TWI667827B - Vehicle battery temperature regulation methods and temperature regulation system - Google Patents

Abstract

The invention discloses a temperature regulation method and a temperature regulation system for a vehicle battery, wherein the temperature regulation system of the vehicle battery comprises a plurality of compressors and a plurality of battery cooling circuits corresponding to the plurality of compressors, a plurality of batteries, and a plurality of batteries and a plurality of batteries connected The plurality of battery temperature adjustment modules between the cooling circuits, the temperature adjustment method of the vehicle battery includes the following steps: separately obtaining the temperature adjustment required power of the plurality of batteries; separately obtaining the temperature adjustment actual power of the plurality of batteries; adjusting the required power and temperature according to the temperature adjustment The actual power controls the corresponding battery temperature adjustment module of each battery to adjust the temperature of the battery. The invention can precisely control the heating power and the cooling power of each battery according to the actual state of each battery, adjust the temperature when the battery temperature is too high or too low, so that the temperature of the battery is maintained within a preset range, and Ensure the temperature balance between the batteries.

Description

Vehicle battery temperature regulation method and temperature regulation system

The present invention relates to the field of automobile technology, and in particular, to a temperature adjustment method for a vehicle battery and a temperature adjustment system for a vehicle battery.

At present, the performance of the vehicle battery of an electric vehicle is greatly affected by the climatic environment. If the ambient temperature is too high or too low, the performance of the vehicle battery will be affected. Therefore, the temperature of the vehicle battery needs to be adjusted to maintain the temperature within the preset range. .

In the related art, in a hot climate region, it is necessary to add a battery cooling system to the electric vehicle to reduce the temperature when the vehicle battery temperature is too high; for a cold climate region, it is necessary to add a battery heating system to the electric vehicle. To raise the temperature when the vehicle battery temperature is too low.

However, for areas with hot summers and cold winters, the above methods cannot solve the problem of excessive temperature and low temperature of the vehicle battery, and the method for adjusting the temperature of the vehicle battery is rough, and cannot be accurately controlled according to the actual state of each battery. The heating power and cooling power of each battery.

The present invention aims to solve at least one of the technical problems in the related art to some extent.

To this end, an object of the present invention is to provide a temperature adjustment method for a vehicle battery, which can accurately control the heating power and cooling power of each battery according to the actual state of each battery, when the battery temperature is too high or too low. The temperature is adjusted to maintain the temperature of the battery within a preset range, and the temperature between the batteries can be balanced.

Another object of the present invention is to provide a temperature adjustment system for a vehicle battery. In order to achieve the above object, an embodiment of the present invention provides a temperature adjustment method for a vehicle battery, wherein the temperature adjustment system of the vehicle battery includes a plurality of compressors and a plurality of battery cooling circuits corresponding to the plurality of compressors, a plurality of batteries, and a plurality of battery temperature adjustment modules connected between the plurality of batteries and the plurality of battery cooling circuits, the method comprising the steps of: separately obtaining temperature adjustment required power of the plurality of batteries Obtaining the actual temperature of the temperature of the plurality of batteries respectively; adjusting the required power according to the temperature and the actual power of the temperature to control the corresponding battery temperature adjustment module of each battery to adjust the temperature of the battery, wherein The plurality of battery cooling circuits communicate with each other, and adjust the required power according to the temperature of the battery and adjust the actual power to adjust the cooling capacity of the plurality of compressors to the battery cooling circuit corresponding to the battery.

According to the temperature adjustment method of the vehicle battery according to the embodiment of the present invention, firstly, the temperature adjustment required power of the plurality of batteries is separately obtained, and then the temperature adjustment actual power of the plurality of batteries is respectively obtained, and finally, the required power and temperature adjustment are adjusted according to the temperature of the plurality of batteries. The actual power controls the battery temperature adjustment module to adjust the temperature of the plurality of parallel batteries. Therefore, the method can accurately control the heating power and the cooling power of each battery according to the actual state of each battery, and adjust the temperature when the battery temperature is too high or too low, so that the temperature of the battery is maintained at a preset range. And can ensure the temperature balance between the individual batteries.

In addition, the temperature adjustment method of the vehicle battery according to the above embodiment of the present invention may further have the following additional technical features: According to an embodiment of the present invention, the required power is adjusted according to the temperature and the actual power is adjusted for the battery. The corresponding battery temperature adjustment module controls to adjust the temperature of the battery, and specifically includes: adjusting the required power according to the temperature and adjusting the actual power to adjust the corresponding battery temperature adjustment mode of each battery in the target time. The group performs control to adjust the temperature of the battery to reach the target temperature.

According to an embodiment of the present invention, the method for temperature regulation of the on-vehicle battery further includes: generating a total temperature adjustment required power according to a temperature adjustment demand power of each of the batteries; generating the plurality of compressors according to the rated cooling power of the plurality of compressors The total rated cooling power; determining whether the total temperature regulating required power is greater than the total rated cooling power of the plurality of compressors; if the total temperature regulating required power is greater than the total rated cooling power of the plurality of compressors, then the plurality of compressors are The cooling capacity of the battery cooling circuit corresponding to the battery is adjusted to a maximum; if the total temperature regulating required power is less than or equal to the total rated cooling power of the plurality of compressors, the required power and the total rated cooling power are adjusted according to the total temperature The difference is adjusted for the cooling capacity of the battery cooling circuit corresponding to the battery.

According to an embodiment of the present invention, the separately obtaining the temperature adjustment required power of the plurality of batteries specifically includes: acquiring the first parameter of each battery opening temperature adjustment separately, and generating the first of each battery according to the first parameter. Temperature regulation required power; separately obtaining a second parameter of each battery during temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter; adjusting required power and the second according to the first temperature The temperature regulation required power produces this temperature regulated demand power for each battery.

According to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time from the initial temperature to the target temperature, and the first temperature is generated according to the first parameter. The power specifically includes: acquiring a first temperature difference between the initial temperature and the target temperature; generating a first temperature adjustment required power according to the first temperature difference and the target time.

According to an embodiment of the invention, the first temperature regulation demand power is generated by the following formula: ΔT ₁ *C*M/t, wherein ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t For this target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is an average current of the battery within a preset time, and the second temperature condition required power is generated by the following formula: I ² *R, where I is the average current, R Is the internal resistance of the battery.

According to an embodiment of the present invention, the method further includes: detecting a temperature of the plurality of batteries; entering a cooling mode when a temperature of any one of the plurality of batteries is greater than a first temperature threshold; When the temperature of a battery is less than the second temperature threshold, the heating mode is entered.

According to an embodiment of the present invention, when in the cooling mode, the corresponding battery temperature adjustment module of each battery is controlled to adjust the temperature of the battery according to the temperature adjustment required power and the temperature adjustment actual power. Specifically, the method includes: determining whether the temperature adjustment required power of each battery is greater than a temperature adjustment actual power corresponding to each battery; if a battery temperature adjustment required power is greater than a temperature adjustment actual power of the battery, acquiring the battery The temperature adjusts the power difference between the required power and the actual power of the temperature adjustment, and increases the power of the compressor for cooling the battery according to the power difference, or adjusts the coolant flow rate of the battery cooling circuit corresponding to the battery. To increase the cooling power of the battery; if the temperature adjustment required power of the battery is less than or equal to the temperature corresponding to the battery, the power of the compressor is reduced or the power of the compressor is kept constant, or adjusted Reducing the coolant flow rate of the battery cooling circuit corresponding to the battery to reduce the Cooling power pool.

According to an embodiment of the present invention, when in the heating mode, the corresponding battery temperature adjustment module of each battery is controlled to adjust the temperature of the battery according to the temperature adjustment required power and the temperature adjustment actual power. Specifically, the method includes: determining whether the temperature adjustment required power of each battery is greater than a temperature adjustment actual power corresponding to each battery; if a battery temperature adjustment required power is greater than a temperature adjustment actual power of the battery, acquiring the battery The temperature adjusts the power difference between the required power and the temperature to adjust the actual power, and increases the power of the heater for cooling the battery according to the power difference, or adjusts the coolant flow rate of the loop branch circuit of the battery. To increase the heating power of the battery; if the temperature adjustment required power of the battery is less than or equal to the temperature corresponding to the battery, the power of the heater is reduced, or the loop of the battery is reduced. Coolant flow to reduce the heating power of the battery, or to maintain the heater Rate unchanged.

According to an embodiment of the present invention, the method further includes: if the temperature adjustment required power of the certain battery is less than the corresponding temperature adjustment actual power, reducing the rotation speed of the water pump; if the temperature adjustment requirement of the certain battery If the power is greater than the corresponding temperature to adjust the actual power, the speed of the water pump is increased.

According to an embodiment of the present invention, the separately obtaining the temperature-regulating actual power of the plurality of batteries specifically includes: obtaining an inlet temperature and an outlet temperature of a flow path for adjusting the temperature of each battery, and acquiring a coolant flowing into the flow path. a flow rate; generating a second temperature difference for each battery based on the flow path inlet temperature and the outlet temperature of each of the cells; generating a temperature-regulated actual power for each of the cells based on the second temperature difference of the each battery and the flow rate.

According to an embodiment of the invention, the temperature-regulated actual power is generated by the following formula: ΔT ₂ *c*m, wherein ΔT _{2 is} the second temperature difference, c is the specific heat capacity of the coolant in the battery cooling circuit, m The mass of the coolant flowing through the cross-sectional area of the flow path per unit time, where m=v*ρ*s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow path Cross-sectional area.

According to an embodiment of the present invention, a plurality of compressors for supplying refrigerant to the battery, the method further comprising: determining the number of compressors to be started according to the temperature adjustment required power and the rated cooling power of each compressor ; in the cooling mode, control the corresponding number of compressors to start.

According to an embodiment of the present invention, determining the number of compressors to be started according to the temperature adjustment required power of each battery and the rated cooling power of each compressor specifically includes: adjusting the required power generation according to the temperature of each battery The temperature adjusts the required power; determines whether the total temperature adjustment required power is greater than the rated cooling power of the single compressor; if greater than the rated cooling power of the single compressor, controls the plurality of compressors to start simultaneously.

According to an embodiment of the present invention, the adjusting the power required by the temperature of the battery and the adjusting the actual power to adjust the cooling capacity of the plurality of compressors to the battery cooling circuit corresponding to the battery, specifically: determining each of the Whether the temperature of the battery is required to be greater than the temperature of the battery to adjust the actual power; if the temperature regulation demand power of the battery is greater than the temperature of the battery to adjust the actual power, increase the cooling power of the plurality of compressors or a single compressor, or increase The degree of cooling provided to the battery cooling circuit corresponding to the battery.

In order to achieve the above object, another embodiment of the present invention provides a temperature regulation system for a vehicle battery, comprising: a plurality of compressors; a plurality of condensers connected to the plurality of compressors; and the plurality of compressors and the plurality a plurality of battery cooling circuits between the condensers, wherein the plurality of battery cooling circuits are connected to each other; and the plurality of battery temperature adjusting modules respectively connected to the plurality of batteries and the plurality of battery cooling circuits are respectively configured to obtain the temperature of the plurality of batteries Adjusting the required power and temperature to adjust the actual power, adjusting the required power according to the temperature and the actual power of the temperature to adjust the temperature of the battery, and adjusting the required power according to the temperature and adjusting the actual power according to the temperature to adjust the plurality of compressors to The degree of cooling provided by the battery cooling circuit corresponding to the battery.

According to the temperature regulation system of the vehicle battery according to the embodiment of the invention, the temperature adjustment required power of the plurality of batteries and the actual power of the temperature adjustment are obtained by the battery temperature adjustment module, and the actual power is adjusted according to the temperature of the plurality of batteries, respectively. The temperature of the plurality of parallel batteries is adjusted, and the actual power is adjusted according to the temperature adjustment demand power and temperature to adjust the degree of cooling provided by the plurality of compressors to the battery cooling circuit corresponding to the battery. Therefore, the system can precisely control the heating power and cooling power of each battery according to the actual state of each battery, and adjust the temperature when the battery temperature is too high or too low, so that the temperature of the battery is maintained at a preset range. To avoid the situation that the performance of the vehicle battery is affected by the temperature, and because the plurality of battery cooling circuits are connected to each other, the battery temperature adjustment module can ensure the opening degree of each battery to adjust the cooling capacity of the battery cooling circuit corresponding to each battery. The temperature is balanced.

In addition, the temperature adjustment system of the vehicle battery according to the above embodiment of the present invention may further have the following additional technical features: According to an embodiment of the present invention, the required power is adjusted according to the temperature and the actual power is adjusted to the temperature of the battery. The adjusting comprises: adjusting the required power according to the temperature and adjusting the actual power to adjust the temperature of the battery within the target time to reach the target temperature.

According to an embodiment of the invention, the battery cooling circuit includes a heat exchanger coupled to the battery temperature regulating module.

According to an embodiment of the present invention, the battery temperature adjustment module includes: a flow path for adjusting a temperature of the battery, the flow path is disposed in the battery; and a water pump connected between the flow path and the heat exchanger a medium container, a heater, and a controller, wherein the controller obtains a temperature adjustment required power of the plurality of batteries and a temperature adjustment actual power, and adjusts the required power according to the temperature and adjusts the actual power to the temperature of the battery. Adjustment.

According to an embodiment of the present invention, the battery temperature adjustment module further includes: a first temperature sensor respectively disposed at an inlet of the flow path, a second temperature sensor respectively disposed at an exit of the flow path, and Flow rate sensor.

According to an embodiment of the present invention, the controller is further configured to generate a total temperature adjustment required power according to a temperature adjustment required power of each of the batteries, and generate a total rated cooling of the plurality of compressors according to the rated cooling power of the plurality of compressors. Power, and determining whether the total temperature adjustment required power is greater than a total rated cooling power of the plurality of compressors, wherein the controller compresses the complex number when the total temperature regulation required power is greater than a total rated cooling power of the plurality of compressors The machine adjusts the cooling capacity of the battery cooling circuit corresponding to the battery to a maximum; when the total temperature regulating required power is less than or equal to the total rated cooling power of the plurality of compressors, the controller adjusts the required power according to the total temperature The difference between the total rated cooling powers adjusts the cooling capacity of the battery cooling circuit corresponding to the battery.

According to an embodiment of the present invention, the controller is configured to respectively acquire a first parameter when each battery is turned on, and generate a first temperature adjustment required power of each battery according to the first parameter, and acquire each of the batteries separately a second parameter of the battery during temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter, and generating each battery according to the first temperature adjustment required power and the second temperature adjustment required power This temperature regulates the required power.

According to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time from the initial temperature to the target temperature, and the controller acquires the initial temperature and the target temperature. a first temperature difference between the first temperature difference and the target time to generate a first temperature adjustment required power.

According to an embodiment of the invention, the controller generates the first temperature regulation demand power by: ΔT ₁ *C*M/t, wherein ΔT ₁ is between the initial temperature of each battery and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the present invention, the second parameter is an average current of each battery in a preset time, and the controller generates a second temperature adjustment required power of each battery by using the following formula: I ² *R, Where I is the average current and R is the internal resistance of the battery.

According to an embodiment of the present invention, the controller is further configured to: detect a temperature of the plurality of batteries, and control the temperature adjustment system when a temperature of any one of the plurality of batteries is greater than a first temperature threshold The cooling mode is entered, and the temperature adjustment system is controlled to enter the heating mode when the temperature of any of the plurality of batteries is less than the second temperature threshold.

According to an embodiment of the present invention, when in a cooling mode, the controller acquires the temperature regulation required power of the battery and the temperature adjustment when a temperature adjustment required power of a battery is greater than a temperature adjustment actual power of the battery. The power difference between the actual powers, and according to the power difference, increases the power of the compressor for cooling the battery, or adjusts the coolant flow rate of the battery cooling circuit corresponding to the battery to increase the cooling power of the battery, and When the temperature adjustment required power of the battery is less than or equal to the temperature-adjusted actual power of the battery, the power of the compressor is reduced or the power of the compressor is kept constant, or the battery cooling circuit corresponding to the battery is adjusted to be reduced. Coolant flow to reduce the cooling power of the battery.

According to an embodiment of the present invention, when in a heating mode, the controller acquires the temperature adjustment required power of the battery and the temperature adjustment when a temperature adjustment required power of a battery is greater than a temperature adjustment actual power of the battery. a power difference between actual powers, and according to the power difference, increasing the power of the heater for cooling the battery or adjusting the coolant flow rate of the loop branch circuit of the battery to increase the heating power of the battery, and When the temperature adjustment demand power of a battery is less than or equal to the temperature corresponding to the actual power of the battery, reduce the power of the heater or adjust the coolant flow rate of the loop branch circuit of the battery to reduce the heating power of the battery. , or keep the power of the heater unchanged.

According to an embodiment of the present invention, the controller is further configured to: when the temperature adjustment required power of the certain battery is less than the corresponding temperature adjustment actual power, reduce the rotation speed of the water pump, and in the battery When the temperature adjustment demand power is greater than the corresponding temperature adjustment actual power, the rotation speed of the water pump is increased.

According to an embodiment of the invention, the controller generates a second temperature difference of each battery according to an inlet temperature detected by the first temperature sensor and an outlet temperature detected by the second temperature sensor, respectively, according to the The second temperature difference of each battery and the flow rate detected by the flow rate sensor produce a temperature-regulated actual power for each of the batteries.

According to an embodiment of the invention, the temperature-regulated actual power is generated by the following formula: ΔT ₂ *c*m, wherein ΔT _{2 is} the second temperature difference, c is the specific heat capacity of the coolant in the battery cooling circuit, m is the mass of the coolant flowing through the cross-sectional area of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow path The cross-sectional area.

According to an embodiment of the invention, there are a plurality of compressors for supplying refrigerant to the battery, and the controller is further configured to: determine the started compressor according to the temperature adjustment required power and the rated cooling power of each compressor The number, and when the temperature regulation system is in the cooling mode, controls the corresponding number of compressors to start.

According to an embodiment of the present invention, the controller generates a total temperature adjustment required power according to the temperature adjustment required power of each battery, and controls the total temperature adjustment required power when the total temperature adjustment demand power is greater than the rated cooling power of the single compressor. The multiple compressors are started at the same time.

According to an embodiment of the present invention, the controller is further configured to increase a cooling power of the battery with a higher temperature when the temperature difference between the batteries exceeds a set value when in the cooling mode; when in the heating mode, When the temperature difference between the batteries exceeds a set value, the heating power of the battery having a lower temperature is increased.

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

When the number of batteries of the vehicle is one, as shown in FIGS. 1A and 1B, the temperature regulation system of the vehicle battery includes: a compressor 1, a condenser 2, a battery cooling branch 4, and a battery temperature adjustment module 5. .

Among them, the condenser 2 is connected to the compressor 1, and the battery cooling branch 4 is connected between the compressor 1 and the condenser 2. The battery temperature adjustment module 5 is connected to the battery cooling branch 4 for obtaining the temperature adjustment demand power P1 of the battery 6 and the temperature adjustment actual power P2 of the battery, and adjusting the required power P1 according to the temperature and the actual power P2 of the temperature adjustment to the battery 6 The temperature is adjusted. The compressor 1 and the condenser 2 constitute a cooling branch.

Specifically, when the temperature adjustment required power P1 is to adjust the temperature of the battery to the target temperature, the temperature required by the battery adjusts the power. The battery temperature adjustment actual power P2 is the temperature adjustment power actually obtained by the battery when the battery is currently temperature-adjusted. The target temperature is the set value, which can be preset according to the actual condition of the vehicle battery. For example, when it is winter, the outdoor environment temperature is very low, and the battery needs to be heated. The target temperature can be set at about 10 ° C. When it is summer, The battery needs to be cooled and the target temperature can be set at around 35 °C. The battery temperature adjustment module 5 acquires the temperature adjustment required power P1 of the battery 6 and the temperature adjustment actual power P2 of the battery 6, and adjusts the power of the compressor 1 and the heater according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 to the battery The temperature of 6 is adjusted. As shown in FIG. 1A, when the coolant of the air conditioner is not connected to the battery temperature adjustment module 5, the battery cooling branch 4 has two pipes, the first pipe is connected to the compressor 1, and the second pipe is connected to the battery. The temperature adjustment module 5 is in communication, wherein the first pipe and the second pipe are disposed adjacent to each other independently, so that the media (media such as refrigerant, water, oil, air, or phase change material or other chemicals) are independent of each other. . When the temperature of the battery 6 is too high, the vehicle air conditioning refrigeration function is turned on, the battery cooling function is activated, and the flow directions of the coolant (such as the refrigerant) in the first pipe and the second pipe are respectively: compressor 1 - condenser 2 - battery cooling Branch 4 - Compressor 1; Battery Cooling Branch 4 - Battery Temperature Regulation Module 5 - Battery 6 - Battery Temperature Regulation Module 5 - Battery Cooling Branch 4.

As shown in FIG. 1B, when the coolant of the air conditioner is connected to the battery temperature adjustment module 5, the flow direction of the coolant is: compressor 1 - condenser 2 - battery cooling branch 4 - battery temperature adjustment module 5—Battery 6—Battery temperature adjustment module 5—Compressor 1.

In the above two embodiments, the vehicle air conditioner is only used to cool and heat the battery 6, and the temperature adjustment system can also cool both the cabin and the battery 6 by the vehicle air conditioner. When the system cools both the compartment and the battery 6 by the vehicle air conditioner, as shown in Fig. 2, the temperature adjustment system may further include an in-vehicle cooling branch 3, and the in-vehicle cooling branch 3 is connected to the compressor 1 and the condenser. Between 2.

When the temperature inside the vehicle is too high, the cooling function in the vehicle is started, and the flow direction of the coolant is: compressor 1 - condenser 2 - interior cooling branch 3 - compressor 1. When the temperature of the battery 6 is too high, the battery cooling function is started, and the flow direction of the coolant in the first pipe and the second pipe is: compressor 1 - condenser 2 - battery cooling branch 4 - compressor 1; battery cooling branch Road 4 - battery temperature adjustment module 5 - battery 6 - battery temperature adjustment module 5 - battery cooling branch 4. Thereby, the heating power and the cooling power of the vehicle battery can be accurately controlled according to the actual state of the battery, thereby adjusting the temperature when the vehicle battery temperature is too high or too low, so that the temperature of the vehicle battery is maintained within a preset range to avoid occurrence. Since the temperature affects the performance of the vehicle battery, and the temperature of the battery satisfies the requirements, the temperature inside the vehicle can be satisfied.

Further, according to an embodiment of the present invention, as shown in FIG. 3, the battery cooling branch 4 may include a heat exchanger 41 including a first pipe and a second pipe, and a second pipe and battery temperature adjustment The modules 5 are connected, and the first pipe is in communication with the compressor 1, wherein the first pipe and the second pipe are disposed adjacent to each other independently. In the embodiment of the present invention, the physical position of the heat exchanger 41 can be located in the circuit where the vehicle air conditioner compressor 1 is located, which facilitates the factory debugging of the vehicle air conditioner, and enables the vehicle air conditioner to be separately supplied and assembled, and at the same time, the vehicle air conditioner is installed. Only the media needs to be added once in the program. The physical position of the heat exchanger 41 can also be located in the circuit where the battery 6 is located. The physical position of the heat exchanger 41 can also be set independently of the circuit in which the vehicle air conditioner compressor 1 is located and the circuit in which the battery 6 is located.

As shown in FIG. 3, the battery temperature adjustment module 5 may include a flow path (not specifically shown) for adjusting the temperature of the battery, and the flow path is disposed in the battery 6. A pump 51, a medium container 52, a heater 53, and a controller (not specifically shown) are connected between the flow path and the heat exchanger 41. The controller acquires the temperature adjustment demand power P1 of the battery 6 and the temperature adjustment actual power P2 of the battery, and adjusts the temperature of the battery 6 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery. The in-vehicle cooling branch 3 may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33. The battery cooling branch 4 may also include a second expansion valve 42 and a second electronic valve 43.

It can be understood that the battery cooling branch 4 may not be provided with the heat exchanger 41. When there is no heat exchanger 41, the refrigerant flowing in the battery cooling branch 4 is the refrigerant. If the heat exchanger 41 is provided, the refrigerant flows in the first pipe of the battery cooling branch 4, the coolant flows in the second pipe, and the refrigerant flows in the cooling pipe 3 in the vehicle.

According to an embodiment of the present invention, as shown in FIG. 3, the battery temperature adjustment module 5 further includes a first temperature sensor 55 disposed at an inlet of the flow path, and a second temperature sensing disposed at an outlet of the flow path. The device 56, as well as the flow rate sensor 57. It will be appreciated that the inlet and outlet locations of the flow path are not absolute, but are determined based on the steering of the pump 51.

Specifically, as shown in FIG. 3A, the controller may include a battery management controller, a battery thermal management controller, and a vehicle air conditioner controller. The battery thermal management controller may be electrically connected to the first temperature sensor 51, the second temperature sensor 52, and the flow rate sensor 57, and perform CAN communication with the pump 51 and the heater 53, and according to the specific heat capacity of the medium. The density of the medium, the cross-sectional area of the flow path, the temperature-adjusted actual power P2, the control of the rotational speed of the pump 51, and the control of the power of the heater 53 are obtained. The battery management controller collects the current flowing through the battery, the temperature of the battery itself, and obtains the temperature adjustment demand power P1 according to the target temperature of the battery, the target time t, the specific heat capacity C of the battery, the quality M of the battery, and the internal resistance R of the battery. And control the vehicle air conditioner controller to start or stop working. The vehicle air conditioner controller is electrically connected with the expansion valve and the electronic valve, and the vehicle air conditioner controller can perform CAN communication with the battery management controller and the battery thermal management controller and the compressor 1 to adjust the required power according to the temperature acquired by the battery management controller. P1 and the temperature adjustment actual power P2 obtained by the battery thermal management controller control the power P of the compressor, the opening and closing of the expansion valve and the electronic valve, and achieve the purpose of controlling the heat exchange amount.

The heat exchanger 41 can be a plate heat exchanger, and the plate heat exchanger can be installed inside the vehicle air conditioner, so that the entire refrigerant circuit is inside the vehicle air conditioner, which facilitates the factory debugging of the vehicle air conditioner, and enables the vehicle air conditioner to be separately supplied and assembled. At the same time, the vehicle air conditioner only needs to be refilled once in the installation procedure.

The coolant flows into the inside of the battery 6 from the inlet of the flow path, and flows out from the outlet of the flow path, thereby achieving heat exchange between the battery 6 and the cooling liquid.

The pump 51 is mainly used to provide power. The medium container 52 is mainly used for storing the coolant and receiving the coolant added to the temperature regulation system. When the coolant in the temperature regulation system is reduced, the coolant in the medium container 52 can be automatically replenished. . The heater 53 can be a PTC (Positive Temperature Coefficient, a semiconductor material or component having a large positive temperature coefficient), and can perform CAN (Controller Area Network) communication with the controller. The heating power is provided for the temperature regulation system of the vehicle battery, and is controlled by the controller, and the heater 53 can be disposed at any position between the medium container 52 and the first temperature sensor 55. That is, the heater 53 is not directly in contact with the battery 6, and has high safety, reliability, and practicability.

The first temperature sensor 55 is configured to detect the temperature of the coolant at the flow path inlet, and the second temperature sensor 56 is configured to detect the temperature of the coolant at the flow path outlet. The flow rate sensor 57 is used to detect the flow rate information of the coolant in the pipe in the temperature regulation system. The first electronic valve 33 is used to control the opening and closing of the in-vehicle cooling branch 3, and the first expansion valve 32 can be used to control the flow rate of the coolant in the in-vehicle cooling branch 3. The second electronic valve 43 is used to control the opening and closing of the battery cooling branch 4, and the second expansion valve 42 can be used to control the flow of the coolant in the battery cooling branch 4.

It can be understood that, as shown in FIG. 1B, when the coolant of the air conditioner is connected to the battery temperature adjustment module 5, it is not necessary to provide the heat exchanger 41, the pump 51, and the medium container 52. The way of connecting the vehicle air conditioning circuit and the battery cooling branch 4 can improve the cooling efficiency and avoid the problem of incomplete heat exchange at the heat exchanger 41, that is, the heat exchange caused by the heat exchange efficiency of the heat exchanger is eliminated. loss. In the manner in which the coolant of the vehicle air conditioning circuit and the cooling branch of the battery are independent of each other, the power of the compressor in the vehicle air conditioning circuit is the actual power of the compressor for cooling the battery after considering the heat exchange efficiency of the heat exchanger 41 or the like. And the compressor power P described later is the power of the compressor described herein for cooling the battery (it is understood that the maximum (or rated) cooling power of the compressor described later is the maximum (or rated) power of the compressor. Multiply by heat transfer efficiency). Wherein, the heat exchange efficiency can be set to a certain value, measured after the whole system is built; or it can be obtained immediately, and the temperature sensor can be added before and after the heat exchanger and the circuit where the heat exchanger is located By increasing the flow rate sensor, the actual heat exchange power can be known, and the ratio of the actual temperature of the battery to the actual heat transfer power P2 is the heat exchange efficiency.

The following describes how the battery temperature adjustment module 5 obtains the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery 6 in conjunction with specific embodiments.

According to an embodiment of the present invention, the controller may be configured to acquire a first parameter when the battery is turned on, and generate a first temperature adjustment required power of the battery according to the first parameter, and acquire a second parameter of the battery when the temperature is adjusted. And generating a second temperature adjustment required power of the battery according to the second parameter, and generating a temperature adjustment required power P1 of the battery according to the first temperature adjustment required power of the battery and the second temperature adjustment required power of the battery.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery 6 is turned on, and a target time t from the initial temperature to the target temperature, and the controller acquires between the initial temperature and the target temperature. The first temperature difference ΔT ₁ , and the first temperature adjustment required power is generated according to the first temperature difference ΔT ₁ and the target time t.

Further, the controller generates the first temperature adjustment required power by the following formula (1): ΔT ₁ *C*M/t (1), where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery 6, and M is the quality of the battery 6.

The second parameter is the average current I of the battery 6 for a preset time, and the controller generates the second temperature adjustment required power by the following formula (2): I ² *R, (2), where I is the average current, and R is The internal resistance of the battery 6.

When the battery 6 is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery 6 is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the invention, the controller generates a second temperature difference ΔT ₂ according to the inlet temperature detected by the first temperature sensor 55 and the outlet temperature detected by the second temperature sensor 56, respectively, and according to each battery The second temperature difference ΔT ₂ and the flow rate v detected by the flow rate sensor 57 generate the temperature-regulated actual power P2 of the battery.

Further, according to an embodiment of the present invention, the actual power P2 is adjusted according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is in the flow path The specific heat capacity of the coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * s * ρ, s is the cross-sectional area of the flow path, v is the flow rate of the coolant, ρ is The density of the coolant.

In addition, the flow rate sensor can also be replaced by a flow sensor, m=Q*ρ, and Q is the flow rate of the coolant flowing through the cross-sectional area of the flow path per unit time measured by the flow sensor.

Specifically, after the vehicle is powered on, the battery management controller determines whether the vehicle needs to perform temperature adjustment. If it is determined that the vehicle needs temperature adjustment, for example, the temperature of the battery 6 is too high, the temperature adjustment function is sent to the vehicle air conditioner controller through the CAN communication. Information, the vehicle air conditioner controller turns on the temperature adjustment function and sends the heat exchange information to the battery thermal management controller, while the vehicle controller controls the second electronic valve 43 to be turned on, and the battery thermal management controller controls the pump 51 to the default speed (such as the low speed) )start working.

At the same time, the battery management controller acquires the initial temperature (ie, the current temperature) of the battery 6, the target temperature, and the target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t can be preset according to actual conditions, and according to the formula (1) Calculate the first temperature adjustment required power of the battery. The battery management controller also obtains the average current I of the battery 6 for a preset time, and calculates the second temperature adjustment required power of the battery according to formula (2). Then, the battery management controller calculates the temperature adjustment required power P1 according to the first temperature adjustment required power of the battery 6 and the second temperature adjustment required power (that is, the required power of the battery 6 is adjusted to the target temperature within the target time), wherein When the battery 6 is cooled, P1 = ΔT ₁ * C * M / t + I ² * R, and when the battery 6 is heated, P1 = ΔT ₁ * C * M / tI ² * R.

Moreover, the battery thermal management controller acquires the first temperature sensor 55 and the second temperature sensor 56 to detect the temperature information, and obtains the flow rate information detected by the flow rate sensor 57, and calculates the battery 6 according to the formula (3). The temperature adjusts the actual power P2.

Finally, the vehicle air conditioner controller controls the output power of the compressor and the opening degree of the second expansion valve 42 according to the temperature adjustment required power P1 of the battery 6, and the temperature adjustment actual power P2. Alternatively, the battery thermal management controller adjusts the pump 51. Speed. For example, if the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, the difference between the temperature adjustment demand power P1 and the temperature adjustment actual power P2 is increased, the power of the compressor is increased, and the opening degree of the second expansion valve 42 is increased. Optionally, the rotation speed of the pump 51 is increased; if the temperature adjustment required power P1 is smaller than the temperature adjustment actual power P2, the difference between the required power P1 and the temperature adjustment actual power P2 is adjusted according to the temperature, and the power of the compressor is reduced and reduced. The opening of the second expansion valve 42 selectively reduces the rotational speed of the pump 51.

For example, it can be seen from the above embodiment that the temperature adjustment required power P1 is composed of two parts. When the battery 6 needs to be cooled, the initial temperature of the battery 6 is 45 ° C, and the target temperature is 35 ° C, then the battery needs to be lowered from 45 ° C to 35 ° C. The heat dissipated is fixed and can be directly calculated by the formula (1), that is, ΔT ₁ *C*M/t, that is, the first temperature adjustment requires power. At the same time, the battery 6 has a discharge and charging procedure in the cooling process. This program generates heat. Since the discharge of the battery 6 or the charging current is changed, this part of the heat can also be directly obtained by detecting the average current I of the battery. The heating power of the current battery 6 is directly calculated by the formula (3), that is, I ² *R, that is, the second temperature adjustment required power. The cooling completion time of the present invention is set based on the target time t (t can be changed according to user needs or the actual design of the vehicle). After determining the target time t required for the completion of the cooling, it is possible to estimate the temperature adjustment required power P1 required for the current battery 6 to cool, P1 = ΔT ₁ * C * M / t + I ² * R. If the heating function is activated, the temperature adjustment demand power P1=ΔT ₁ *C*M/tI ² *R, that is, the larger the discharge or charging current of the battery 6 in the heating process of the battery 6 is, the required heating power That is, the temperature adjustment demand power P1 is smaller.

How to adjust the temperature of the battery 6 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 according to the temperature of each battery 6 will be described below with reference to specific embodiments.

According to an embodiment of the invention, the controller is further configured to detect a temperature of the battery, and when the temperature of the battery is greater than the first temperature threshold, control the temperature adjustment system to enter the cooling mode, and the temperature of the battery is less than the second temperature At the critical value, the temperature control system is controlled to enter the heating mode. The first temperature threshold and the second temperature threshold may be preset according to actual conditions, and the first temperature threshold is generally greater than the second temperature threshold. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold The value can be 0 °C.

Specifically, after the vehicle is powered on, the battery management controller instantly detects the temperature of the battery 6 and makes a determination. If the temperature of the battery 6 is higher than 40 ° C, indicating that the temperature of the battery 6 is too high at this time, in order to avoid the influence of the high temperature on the performance of the battery 6, it is necessary to cool the battery 6 to control the temperature adjustment system to enter the cooling mode, and send The battery cooling function starts the information to the car air conditioner controller. The vehicle air conditioner controller controls the second electronic valve 43 to be turned on after receiving the battery cooling function activation information to exchange heat between the coolant and the battery 6 to lower the temperature of the battery 6. As shown in FIG. 3, when the temperature adjustment system operates in the cooling mode, the flow directions of the coolants in the corresponding first pipe and the second pipe in the circuit of the battery 6 are: compressor 1 - condenser 2 - second Electronic valve 43 - second expansion valve 42 - heat exchanger 41 - compressor 1; medium container 52 - heat exchanger 41 - heater 53 (closed) - pump 51 - valve 58 - first temperature sensor 55 - The battery 6 - the second temperature sensor 56 - the flow rate sensor 57 - the medium container 52, is circulated, and heat is exchanged at the heat exchanger 41 to effect cooling of the battery 6.

If the temperature of the battery 6 is lower than 0 ° C, the temperature of the battery 6 is too low at this time. In order to avoid the influence of the low temperature on the performance of the battery 6, the battery 6 needs to be heated, and the battery management controller controls the temperature adjustment system to enter the heating. Mode, and send battery heating function to start information to the car air conditioner controller. The vehicle air conditioner controller controls the second electronic valve 43 to close after receiving the battery heating function activation information, and the battery thermal management controller controls the heater 53 to be turned on to provide heating power for the temperature regulation system. When the temperature adjustment system is operating in the heating mode, the flow direction of the coolant is: medium container 52 - heat exchanger 41 - heater 53 (on) - pump 51 - first temperature sensor 55 - battery 6 - second The temperature sensor 56 - the flow rate sensor 57 - the medium container 52; in this way, the temperature rise of the battery 6 is achieved.

According to an embodiment of the present invention, when the temperature adjustment system operates in the cooling mode and the temperature adjustment required power P1 of the battery 6 is greater than the temperature-adjusted actual power P2 of the battery, the controller acquires the temperature adjustment required power P1 and temperature of the battery. The power difference between the actual powers P2 is adjusted, and the power of the compressor for cooling the battery 6 is increased according to the power difference, or the coolant flow rate of the battery 6 is increased to increase the cooling power of the battery 6, and the temperature adjustment of the battery 6. When the required power P1 is less than or equal to the temperature-regulated actual power P2, the power of the compressor is reduced or the power of the compressor is kept constant, or the cooling liquid flow rate of the battery is adjusted to reduce the cooling power of the battery 6.

Specifically, when the temperature adjustment system operates in the cooling mode, the battery management controller acquires the temperature adjustment demand power P1 of the battery, the battery thermal management controller acquires the temperature adjustment actual power P2 of the battery, and the vehicle air conditioning controller adjusts the required power P1 according to the temperature. It is judged with the temperature adjustment actual power P2. If the temperature adjustment required power P1 of the battery 6 is greater than the temperature adjustment actual power P2, it indicates that if the cooling of the battery 6 cannot be completed within the target time according to the current cooling power or the coolant flow rate, the vehicle air conditioner controller acquires the temperature of the battery. Adjusting the power difference between the required power P1 and the temperature adjustment actual power P2, and increasing the power of the compressor 1 according to the power difference, or increasing the coolant flow rate of the battery, that is, increasing the opening degree of the second expansion valve 42 to increase the battery The cooling power, wherein the greater the power difference between the temperature-regulated actual power P1 and the temperature-regulated actual power P2, the more the power of the compressor 1 and the coolant flow rate of the battery increase, so that the temperature of the battery is at a preset time t Reduced to the target temperature. And if the temperature adjustment actual power P1 of the battery 6 is less than or equal to the temperature adjustment actual power P2, the vehicle air conditioner controller can keep the power of the compressor 1 constant or appropriately reduce the power of the compressor 1, or reduce the coolant of the battery. The flow rate, that is, the opening degree of the second expansion valve 42, is reduced to reduce the cooling power of the battery. When the temperature of the battery 6 is lower than 35 ° C, the battery 6 is cooled, the battery management controller sends a message to turn off the temperature adjustment function to the vehicle air conditioner controller through the CAN communication, and the vehicle air conditioner controller controls the second electronic valve 43 to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery 6 is higher than 35 ° C, the vehicle air conditioner controller appropriately increases the power of the compressor 1 so that the battery completes the cooling as soon as possible.

According to an embodiment of the present invention, when the temperature adjustment system operates in the heating mode and the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2, the controller acquires the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery. The power difference between them, and the power of the heater 53 for heating the battery is increased according to the power difference, or the coolant flow rate of the battery is increased to increase the heating power of the battery, and the required power P1 is less than or equal to the temperature adjustment of the battery. When the temperature is adjusted to the actual power P2, the power is reduced, or the power of the heater 53 is kept constant, or the cooling liquid flow rate of the battery is adjusted to reduce the heating power of the battery.

Specifically, when the temperature adjustment system operates in the heating mode, the battery management controller acquires the battery P1, and the battery thermal management controller acquires the battery temperature adjustment actual power P2. If the temperature adjustment required power P1 of the battery 6 is greater than the temperature adjustment actual power P2, it indicates that if the temperature of the battery 6 cannot be completed within the target time according to the current heating power or the coolant flow rate, the battery thermal management controller acquires the battery. The temperature adjusts the power difference between the required power P1 and the temperature-regulated actual power P2, and increases the power of the heater 53 for heating the battery 6 according to the power difference, or adjusts the flow rate of the coolant to increase the battery, for example, the pump 51 can be increased. The speed of rotation allows the battery to complete temperature regulation within the target time. Wherein, the greater the difference between the temperature adjustment demand power P1 and the temperature adjustment actual power P2, the more the power of the heater 53 and the coolant flow rate of the battery circuit increase. And if the temperature adjustment required power P1 of the battery is less than or equal to the temperature adjustment actual power P2, the battery thermal management controller may appropriately reduce the power of the heater 53, or keep the power of the heater 53 unchanged, or adjust to reduce the battery circuit. Coolant flow to reduce the heating power of the battery. When the temperature of the battery 6 is higher than a preset temperature, for example, 10 ° C, the battery 6 is heated, and the battery management controller sends a message for turning off the temperature adjustment function to the battery thermal management controller through the CAN communication, and the battery thermal management controller controls the heater. 53 closed. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery 6 is still lower than 10 ° C, the battery thermal management controller appropriately increases the power of the heater 53 so that the battery 6 is warmed up as soon as possible. .

According to an embodiment of the present invention, the controller is further configured to reduce the rotation speed of the pump 51 or keep the rotation speed of the pump 51 when the temperature adjustment required power P1 of the battery is less than or equal to the corresponding temperature adjustment actual power P2, and When the temperature adjustment required power P1 of the battery is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump 51 is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the temperature adjustment required power P1 of the battery 6 is less than the temperature adjustment actual power P2, the controller controls the rotation speed of the pump 51 to be reduced to save power, or to maintain the pump 51. The speed does not change. If the temperature adjustment required power P1 of the battery 6 is greater than the temperature adjustment actual power P2, the controller is used to control the increase of the power of the heater 53, the compressor 1, or the coolant flow rate of the circuit in which the battery is located, and is also used to control the pump 51. The increase of the rotational speed can increase the quality of the coolant flowing through the cross section of the cooling flow path per unit time, thereby increasing the temperature adjustment actual power P2 of the battery to achieve temperature adjustment within the target time t. On the other hand, if the temperature adjustment required power P1 of the battery 6 is equal to the temperature adjustment actual power P2, the rotation speed of the control pump 51 is maintained at the current rotation speed.

In summary, when the temperature adjustment system operates in the cooling mode, if the sum of the temperature adjustment required power P1 of the battery 6 and the in-vehicle cooling required power P4 is less than the maximum cooling power P of the compressor, that is, P1+P4≤P, the vehicle air conditioner The controller controls the compressor 1 to operate at a P1 + P4 cooling power. If P1+P4>P, the battery management controller determines whether the temperature of the battery 6 is greater than a set temperature (for example, 45 ° C), and if it is greater than 45 ° C, the cooling power is preferentially provided to the battery 6, and the vehicle air conditioner controller controls the compressor 1 according to The maximum cooling power operation, the vehicle air conditioner controller controls the opening degrees of the first expansion valve 32 and the second expansion valve 42, so that the cooling power of the battery cooling branch 4 is equal to the battery temperature regulation demand power P1, and the interior cooling branch The power P4 is equal to P minus P1. If it is determined that the battery temperature is not greater than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the interior of the vehicle, and the compressor 1 is controlled to operate at the maximum cooling power, and the cooling power of the in-vehicle cooling branch 3 is P4. The cooling power of the battery cooling branch 4 is P-P4. If the temperature inside the vehicle has reached the set temperature, the cooling of the battery 6 is preferentially satisfied.

When the battery 6 has P1>P2 and the battery 6 needs to be adjusted to have power P3 (P3=P1-P2), if P1+P4+P3≤P, the compressor 1 needs to increase the cooling power to P3, which can be increased by The opening of the second expansion valve 42 and/or the rotation speed of the pump 51 is increased so that P1 = P2. If P1+P4+P3>P, the battery management controller determines whether the battery temperature is greater than the set temperature. For example, the set temperature may be 45 ° C. If the battery temperature is greater than 45 ° C, the battery 6 is preferentially provided with cooling power. The air conditioner controller controls the compressor 1 to operate according to the maximum cooling power. By adjusting the opening degrees of the first expansion valve 32 and the second expansion valve 42, the cooling power of the battery cooling branch 4 is increased by P3 so that P1 = P2, in the vehicle. The cooling power of the cooling branch 3 is reduced. If it is determined that the battery temperature is not greater than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the interior of the vehicle, and the compressor 1 is controlled to operate at the maximum cooling power, and the cooling power of the in-vehicle cooling branch 3 is P4. The cooling power of the battery cooling branch 4 is P-P4. If the temperature inside the vehicle has reached the set temperature, the cooling of the battery 6 is preferentially satisfied, and the cooling power of the battery cooling branch 4 is increased by P3.

And if P1 ≤ P2, then the vehicle air conditioner controller maintains the power of the compressor, or reduces the power of the compressor, or reduces the opening degree of the second expansion valve 42, or reduces the rotation speed of the pump 51, so that the battery cooling branch The cooling power of 4 drops.

When the temperature regulation system is operating in the heating mode, the power difference between P1 and P2 is P3, that is, P1-P2=P3. If P1>P2, the battery thermal management controller controls the heating power of the heater 53 to increase by P3, and increases the rotational speed of the pump 51. If P1 ≤ P2, the battery thermal management can keep the power of the heater 53 constant, or reduce the power of the heater 53 by P3 to save power or reduce the rotational speed of the pump 51.

If the cooling function is turned on for a preset time, for example, after 1 hour, the temperature of the battery 6 is still higher than 35 ° C, the cooling power of the battery is increased. If the average battery temperature is still below 10 ° C after the heating function is turned on for 1 hour, the battery thermal management controller can appropriately increase the power of the heater 53.

If the single compressor 1 cannot meet the power required to cool the battery 6, the plurality of compressors 1 can be provided to provide cooling power to the battery 6. For example, on a bus, there are usually four compressors, and all four compressors can be used to provide cooling power to the battery 6.

According to an embodiment of the present invention, a plurality of compressors 1 for supplying a refrigerant to a battery are provided, and the in-vehicle cooling branch 3 and the battery cooling branch 4 are plural, and the controller is further configured to adjust according to the temperature of the battery. The required power P1 and the maximum cooling power P of each compressor determine the number of compressors that are started, and control the corresponding number of compressors 1 to start when the temperature adjustment system is in the cooling mode.

Specifically, when there are a plurality of compressors 1, correspondingly, the in-vehicle cooling branch 3 and the battery cooling branch 4 are plural. For example, when there are two compressors 1 for supplying the refrigerant to the battery 6, and two of the in-vehicle cooling branch 3 and the battery cooling branch 4, the controller acquires the battery when the temperature adjustment system enters the cooling mode. The temperature of 6 is required to adjust the power P1. If the temperature adjustment required power P1 of the battery 6 is less than or equal to the maximum cooling power of the single compressor 1, the controller controls a compressor 1 to be started. And if the temperature adjustment required power P1 of the battery 6 is greater than the maximum cooling power of the single compressor 1, the controller controls the two compressors 1 to simultaneously start the operation to meet the cooling and cooling power demand of the battery 6.

The working principle of the compressor 1 is the same as that of the compressor 1 described above. To avoid redundancy, no further details will be described herein.

The temperature regulation system of the vehicle battery according to the embodiment of the present invention can accurately control the heating power and the cooling power of the battery according to the actual state of the battery, and adjust the temperature when the battery temperature is too high or too low, so that the temperature of the battery is maintained at the pre-charge. Set the range to avoid the situation where the performance of the vehicle battery is affected by the temperature.

Fig. 4 is a flow chart showing a temperature adjustment method of a vehicle battery according to a first embodiment of the present invention. As shown in FIG. 4, the temperature adjustment method of the vehicle battery includes the following steps: S1, obtaining the temperature adjustment required power P1 of the battery.

Further, as shown in FIG. 5, in the embodiment of the present invention, acquiring the temperature adjustment required power of the battery specifically includes: S11, acquiring a first parameter when the battery is turned on, and generating a first temperature according to the first parameter. Adjust the demand power.

S12. Acquire a second parameter of the battery during temperature adjustment, and generate a second temperature adjustment required power according to the second parameter.

S13. The temperature adjustment required power P1 is generated according to the first temperature adjustment required power and the second temperature adjustment required power.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the first temperature adjustment requirement is generated according to the first parameter. The power specifically includes: obtaining a first temperature difference ΔT ₁ between the initial temperature and the target temperature. The first temperature adjustment required power P1 is generated based on the first temperature difference ΔT ₁ and the target time t.

Further, according to an embodiment of the present invention, the first temperature adjustment required power is generated by the following formula (1): ΔT ₁ *C*M/t, (1) where ΔT ₁ is between the initial temperature and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is the average current I of the battery for a preset time, and the second temperature adjustment required power is generated by the following formula (2): I ² *R, (2) where I is the average Current, R is the internal resistance of the battery.

S2, obtaining the temperature adjustment actual power P2 of the battery.

According to an embodiment of the present invention, as shown in FIG. 5, acquiring the temperature-regulating actual power of the battery specifically includes: S21: acquiring an inlet temperature and an outlet temperature of a flow path for adjusting a battery temperature, and acquiring a coolant inflow path Flow rate v.

S22, generating a second temperature difference ΔT ₂ according to the inlet temperature and the outlet temperature.

S23, generating a temperature adjustment actual power P2 according to the second temperature difference ΔT ₂ and the flow velocity v.

Further, according to an embodiment of the present invention, the actual temperature P2 is adjusted according to the following formula (3): ΔT ₂ *C*m, (3) where ΔT ₂ is the second temperature difference and C is the battery Specific heat capacity, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the cross section of the flow path area.

In addition, the flow rate sensor can also be replaced by a flow sensor, m=Q*ρ, and Q is the flow rate of the coolant flowing through the cross-sectional area of the flow path per unit time measured by the flow sensor.

S3, adjusting the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2.

Wherein, in the embodiment of the invention, the temperature of the battery is adjusted within the target time according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 to reach the target temperature.

Specifically, after the vehicle is powered on, it is determined whether the battery needs to be temperature-regulated, and if necessary, the initial temperature of the battery (ie, the current temperature), the target temperature, and the target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t are obtained. The preset can be performed according to the actual situation of the vehicle battery, and then the first temperature adjustment required power is calculated according to the formula (1). At the same time, the average current I of the battery in the preset time is obtained, and the second temperature adjustment required power is calculated according to the formula (2). Then, the temperature adjustment required power P1 (that is, the required power of the battery is adjusted to the target temperature) is calculated based on the first temperature adjustment required power and the second temperature adjustment required power. And, the inlet temperature and the outlet temperature of the battery are obtained, and the flow velocity information is acquired, and the actual temperature adjustment power P2 is calculated according to the formula (3). Finally, the compressor or heater is controlled to operate at different powers depending on the temperature regulated demand power P1 and the temperature regulated actual power P2. Therefore, the control method can accurately control the time required for the battery temperature adjustment, and the battery temperature adjustment actual power is instantly adjustable, which can ensure the temperature adjustment of the vehicle battery is completed within the target time, so that the temperature of the vehicle battery is maintained at a preset range. To avoid the situation where the performance of the vehicle battery is affected by temperature.

According to an embodiment of the present invention, as shown in FIG. 6, the temperature adjustment method of the vehicle battery may further include: detecting a temperature of the battery, and determining whether the temperature is greater than a first temperature threshold or less than a second temperature threshold. (S10-S20). When the temperature of the battery is greater than the first temperature threshold, the cooling mode is entered (S30). The first preset temperature threshold may be preset according to actual conditions, for example, may be 40 ° C. When the temperature of the battery is less than or equal to the first temperature threshold, it is further determined whether the temperature of the battery is less than the second temperature threshold, and when the temperature of the battery is less than the second temperature threshold, the heating mode is entered (S40-S50). The second preset temperature threshold may be preset according to actual conditions, for example, may be 0 ° C.

Specifically, after the vehicle is powered on, the temperature of the battery is instantly detected and judged. If the temperature of the battery is higher than 40 °C, it means that the temperature of the battery is too high. In order to avoid the impact of high temperature on the performance of the battery, it is necessary to cool down the battery, enter the cooling mode, and control the start of the compressor to make the coolant and the battery. Perform heat exchange to lower the temperature of the battery. If the temperature of the battery is lower than 0 °C, it means that the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, it is necessary to heat up the battery, enter the heating mode, and control the heater to open to provide heating power. It can be understood that the temperature adjustment of the battery 6 according to the temperature adjustment demand power P1 and the temperature adjustment actual power P2 of the battery can accurately control the time required for the battery temperature adjustment, and the P2 can be instantly adjusted to ensure the target time t. Complete the temperature adjustment of the battery. Also, the temperature adjustment required power P1 and the temperature adjustment actual power P2 are easily acquired.

As can be seen from the above embodiment, P1 is composed of two parts. Taking a cooling battery as an example, when the battery needs to be cooled, the initial temperature of the battery is 45 ° C, and the target temperature of the battery cooling is 35 ° C, the battery needs to be emitted from 45 ° C to 35 ° C. The heat is fixed and can be directly calculated by the formula (1), ΔT ₁ *C*M/t. Where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery. At the same time, in the cooling process, there is a discharge and charging procedure. This program generates heat. This part of the heat can also be directly obtained by detecting the current. The current battery is directly calculated by the formula (3), ie, I ² *R. The heating power, that is, the second temperature adjustment required power. Where I is the average current and R is the internal resistance of the battery. One of the key points of the present invention is that the cooling time is adjustable, and the cooling completion time can be accurately determined. The present invention is set based on the target time t (t can be changed according to user requirements or actual vehicle design conditions). After determining the target time t required for the completion of the cooling, it is possible to estimate the temperature adjustment required power P1 required for the current battery cooling, P1 = ΔT ₁ * C * M / t + I ² * R. If the heating function is activated, the temperature adjustment demand power P1=ΔT ₁ *C*M/tI ² *R, that is, in the heating process of the battery, the larger the battery discharge or the charging current, the required heating power, that is, the temperature adjustment The smaller the required power P1 is.

Since the discharge of the battery or the charging current is varied, I ² *R is varied, so in order to better ensure the accuracy of the cooling time, the cooling power also varies with the current average discharge of the battery or the charging current. And change. If the car air conditioner cools the battery and the car at the same time, when the discharge current of the battery is small, the I ² *R will decrease, and at this time, the car air conditioner can allocate more cooling power to the car, so that the car is faster. The set temperature is reached. At the same time, when the battery discharge or charging current is large, I ² * R will be larger, and the vehicle air conditioner can allocate more cooling power to the battery. Through such adjustment, the time required for cooling the battery is always accurate, and at the same time, the cooling power of the vehicle air conditioner can be utilized more efficiently, without having to configure an air conditioner with a large cooling power, resulting in waste of cooling power.

Since the cooling time of the battery is affected by the cooling efficiency, since the cooling efficiency is affected by the external ambient temperature and the current temperature of the battery, the efficiency of the temperature regulating system is constantly changing in the battery cooling process, so the cooling efficiency cannot be 100%. Therefore, it is impossible to accurately adjust the time required for battery cooling by adjusting the required power P1 according to the temperature. It is necessary to detect the temperature of the battery to adjust the actual power P2. In the present invention, the temperature-adjusted actual power P2 of the battery can be calculated by the formula (3), that is, ΔT2*C*m. P2 can also be calculated by the actual cooling power P2 of the battery. It can also be calculated by the formula (4), ΔT3*C*m1, where ΔT3 is the temperature change of the battery in a certain period of time, C is the specific heat capacity of the battery, and m1 is the battery. quality. However, due to the high quality of the battery, the temperature change is not obvious per unit time. It takes a long time to see that the temperature difference can be detected and does not meet the immediacy requirement. Therefore, the actual temperature P2 is generally calculated according to formula (3).

Due to the cooling efficiency, the temperature adjustment actual power P2 is hardly equal to the temperature adjustment demand power P1. In order to make the battery cooling target time t more accurate, it is necessary to adjust the power difference between the required power P1 and the temperature adjustment actual power P2 according to the temperature. The value is adjusted to ensure that the battery's temperature regulation demand power P1 is equal to the battery's temperature regulation actual power P2.

How to adjust the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 will be described below in conjunction with specific embodiments.

According to an embodiment of the present invention, when the current working mode is the cooling mode, as shown in FIG. 7, adjusting the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 specifically includes: S31, determining the temperature Adjust whether the required power P1 is greater than the temperature-regulated actual power P2.

S32, if the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, the power difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2 is obtained, and the power of the compressor for cooling the battery is increased according to the power difference.

S33. If the temperature adjustment demand power is less than or equal to the temperature adjustment actual power, reduce the power of the compressor or keep the power of the compressor unchanged.

Specifically, when entering the cooling mode, the power of the compressor 1 is adjusted according to the temperature adjustment required power P1 and the temperature adjustment actual power P2. If the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, it means that if the compressor operates at the current power, the temperature of the battery cannot be lowered to the target temperature within the target time t. Therefore, the power difference between the temperature adjustment demand power P1 and the temperature adjustment actual power P2 is continuously obtained, and the power of the compressor is increased according to the power difference. The power difference between the temperature adjustment demand power P1 and the temperature adjustment actual power P2 is larger, and the compressor is larger. The more power is increased, so that the temperature of the battery is lowered to the target temperature within a preset time. On the other hand, if the temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2, the power of the compressor can be kept constant or the power of the compressor can be appropriately reduced. When the temperature of the battery is lower than 35 °C, the battery is cooled, and the information of turning off the temperature adjustment function is sent to the car air conditioner through CAN communication. If the temperature of the battery is still higher than 35 ° C after entering the cooling mode for a long time, for example, after 1 hour, the power of the compressor is appropriately increased to allow the battery to complete the cooling as soon as possible.

According to an embodiment of the present invention, as shown in FIG. 7, when the current working mode is the heating mode, adjusting the actual power according to the temperature adjustment required power and temperature to adjust the temperature of the battery specifically includes: S34, determining the temperature adjustment Whether the required power P1 is greater than the temperature-regulated actual power P2.

S35. If the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, the power difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2 is obtained, and the power of the heater for heating the battery is increased according to the power difference.

S36, if the temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2, the power of the heater is kept unchanged.

Specifically, when entering the heating mode, the heater is turned on, and the power of the heater is adjusted according to the temperature adjustment required power P1 and the temperature adjustment actual power P2. If the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, it means that if the heater is heated according to the current power, the temperature of the battery cannot be raised to the target temperature within a preset time. Therefore, the power difference between the temperature adjustment demand powers P1 and P2 is continuously obtained, and the power of the heater is increased according to the power difference, wherein the difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2 is larger, and the power of the heater is increased. The more. If the temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2, the power of the heater can be kept constant. When the temperature of the battery is higher than the preset temperature, for example, 10 ° C, the battery is heated, and the battery management controller sends a message to the battery thermal management controller to turn off the temperature adjustment function through CAN communication, and controls the heater to turn off. If the temperature of the battery is still below 10 ° C after entering the heating mode for a long time, for example, after 1 hour, the power of the heater is appropriately increased to allow the battery to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, as shown in FIG. 8, the temperature adjustment method of the above-mentioned vehicle battery may further include: S37, if the temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2, the rotation speed of the pump is lowered. Or keep the speed of the pump unchanged.

S38, if the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, the rotation speed of the pump is increased.

Specifically, when entering the heating mode or the cooling mode, if the temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2, the rotation speed of the control pump is lowered to save electric energy or keep the rotation speed of the pump unchanged. If the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, in addition to controlling the power of the heater or the compressor, the speed of the pump is controlled to increase, and the quality of the coolant flowing through the cross section of the cooling flow path per unit time can be increased. , thereby increasing the temperature adjustment actual power P2 to achieve temperature regulation of the battery within the target time.

According to an embodiment of the present invention, when there are a plurality of compressors for supplying a refrigerant to the battery, the above method may further include: determining the started compressor according to the temperature adjustment required power P1 and the maximum cooling power of each compressor quantity. When in the cooling mode, the corresponding number of compressors are controlled to start.

Further, determining the number of compressors to be started according to the temperature adjustment demand power P1 and the maximum cooling power of each compressor specifically includes determining whether the temperature adjustment demand power P1 of the battery is greater than the maximum cooling power of the single compressor. If greater than the maximum cooling power of a single compressor, the control plurality of compressors are simultaneously activated.

For example, when there are two compressors 1 that supply refrigerant to the battery, when entering the cooling mode, the number of compressors that are started is determined according to the temperature adjustment demand power P1 and the maximum cooling power of each compressor, if the temperature Adjusting the required power P1 is less than or equal to the maximum cooling power of a single compressor, then controlling a compressor to start. If the degree-regulated demand power P1 is greater than the maximum cooling power of the single compressor, then the two compressors are controlled to start working simultaneously to meet the cooling and cooling power requirements of the battery.

It should be noted that, in the embodiment of the present invention, the battery may be a single battery pack (consisting of a plurality of battery cells), or may be composed of a plurality of battery packs connected in series, in parallel, or mixed. When the battery includes a plurality of battery packs connected in parallel, temperature-regulated power distribution between the individual battery packs is required, which requires power distribution through the valves.

In summary, when the temperature adjustment system is operating in the cooling mode, if the sum of the temperature adjustment required power P1 of the battery and the required cooling power P4 of the interior is less than the maximum cooling power P of the compressor, that is, P1+P4≤P5, control compression The machine operates according to the P1+P4 cooling power. If P1+P4>P, it is judged whether the temperature of the battery is greater than the set temperature (such as 45 °C). If it is greater than 45 °C, the cooling power is preferentially provided for the battery, and the compressor is controlled to operate according to the maximum cooling power through the cooling branch of the battery. The flow rate of the refrigerant in the cooling branch of the vehicle is controlled so that the cooling power of the cooling branch of the battery is equal to the power demanding power P1 of the battery, and the power P4 of the cooling branch of the vehicle is equal to P minus P1. If it is determined that the battery temperature is not more than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the vehicle, the compressor is controlled to operate according to the maximum cooling power, and the cooling power of the cooling branch in the vehicle is P4, the battery The cooling power of the cooling branch is P-P4. If it is determined that the battery temperature is not greater than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the interior of the vehicle, and the compressor 1 is controlled to operate at the maximum cooling power, and the cooling power of the cooling branch in the vehicle is P4. The cooling power of the battery cooling branch is P-P4. If the temperature inside the car has reached the set temperature, then the cooling of the battery is prioritized.

When the battery has P1>P2 and the battery needs to be adjusted to P3 (P3=P1-P2), if P1+P4+P3≤P5, the compressor 1 needs to increase the cooling power to P3, which can be increased by increasing the battery. The refrigerant flow of the branch and / or increase the speed of the pump so that P1 = P2. If P1+P4+P3>P, the battery management controller determines whether the battery temperature is greater than the set temperature. For example, the set temperature may be 45 ° C. If the temperature of the battery is greater than 45 ° C, the cooling power is preferentially provided for the battery, and the compression is controlled. The machine operates according to the maximum cooling power, so that the cooling power of the battery cooling branch is increased, and the cooling power of the cooling branch in the vehicle is reduced. If it is determined that the battery temperature is not more than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the vehicle, the compressor is controlled to operate according to the maximum cooling power, and the cooling power of the cooling branch in the vehicle is P4, the battery The cooling power of the cooling branch is P-P4. If the temperature inside the vehicle has reached the set temperature, the cooling of the battery is preferentially satisfied, and the cooling power of the battery cooling branch is increased by P3.

If P1 ≤ P2, then the power of the compressor is kept constant, or the power of the compressor is reduced, or the flow rate of the refrigerant cooled by the battery is reduced, or the rotation speed of the pump is lowered, so that the cooling power of the battery cooling branch is lowered.

When the temperature regulation system is operating in the heating mode, the power difference between P1 and P2 is P3, that is, P1-P2=P3. If P1>P2, the heating power of the control heater is increased by P3, and the pump speed is increased. If P1 ≤ P2, the power of the heater can be kept constant, or the heater power can be reduced by P3 to save power or reduce the speed of the pump.

If the cooling function is turned on for a preset time, for example, after 1 hour, the battery temperature is still higher than 35 ° C, the battery cooling power demand is increased. If the average battery temperature is still below 10 °C after the heating function is turned on for 1 hour, the battery thermal management controller can appropriately increase the power of the heater.

According to the temperature adjustment method of the vehicle battery according to the embodiment of the invention, firstly, the temperature adjustment required power of the battery is obtained, and then the temperature adjustment actual power of the battery is obtained, and finally, the temperature is adjusted according to the temperature, and the actual power is adjusted to the temperature of the battery at the target time. Adjust to reach the target temperature. Therefore, the method can accurately control the temperature adjustment time of the battery, and the actual temperature of the battery temperature adjustment is instantly adjustable, which can ensure that the heating power and the cooling power of the vehicle battery are precisely controlled according to the actual state of the vehicle battery in the target time. When the temperature of the vehicle battery is too high or too low, the temperature is adjusted to maintain the temperature of the vehicle battery in a preset range, so as to avoid the situation that the performance of the vehicle battery is affected by the temperature.

In addition, the present invention also provides a non-transitory computer readable storage medium having a computer program stored thereon, which is implemented by the processor to implement the above-described temperature adjustment method of the vehicle battery.

According to the non-transitory computer readable storage medium of the embodiment of the present invention, firstly, the temperature adjustment required power of the battery is acquired, and then the temperature of the battery is adjusted to adjust the actual power. Finally, the actual power is adjusted according to the temperature to adjust the required power and the temperature is performed on the temperature of the battery. The adjustment can adjust the temperature when the temperature of the vehicle battery is too high or too low, so that the temperature of the vehicle battery is maintained within a preset range, thereby avoiding the situation that the performance of the vehicle battery is affected by the temperature.

When the number of the batteries 6 of the vehicle is plural, and the plurality of batteries 6 are connected in parallel, for example, the number of the batteries 6 is two, which are the first battery 61 and the second battery 62, respectively, as shown in FIG. The battery temperature regulation system includes a compressor 1, a condenser 2, a battery cooling branch 4, and a battery temperature adjustment module 5.

Among them, the condenser 2 is connected to the compressor 1, and the battery cooling branch 4 is connected between the compressor 1 and the condenser 2. The battery temperature adjustment module 5 is connected to the plurality of parallel batteries 6 and the battery cooling branch 4, and obtains the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the plurality of parallel batteries, and adjusts the required power according to the temperature of the plurality of parallel batteries respectively. P1 and the temperature-regulated actual power P2 regulate the temperature of the plurality of parallel batteries.

Further, according to an embodiment of the present invention, the temperature of the battery connected in parallel is adjusted according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery connected in parallel, and specifically includes: respectively, according to the temperature of the battery connected in parallel The regulated demand power P1 and the temperature-regulated actual power P2 are adjusted for the target parallel temperature to the target temperature within the target time t.

That is to say, when the battery temperature adjustment module 5 performs temperature adjustment for each battery 6 according to P1 and P2 of each battery, it can be ensured that the heating of the vehicle battery is accurately controlled according to the actual state of each battery 6 within the target time t. Power and cooling power to adjust the temperature when the vehicle battery temperature is too high or too low.

When the temperature inside the vehicle is too high, the cooling function in the vehicle is started, and the flow direction of the coolant is: compressor 1 - condenser 2 - interior cooling branch 3 - compressor 1. When the temperature of the first battery 61 is too high, the battery cooling function is activated, and the flow direction of the coolant in the first pipe and the second pipe is: compressor 1 - condenser 2 - battery cooling branch 4 - compressor 1; Cooling branch 4 - battery temperature regulating module 5 - first battery 61 - battery temperature regulating module 5 - battery cooling back to branch 4. When the temperature of the second battery 62 is too high, the flow direction of the coolant in the first pipe and the second pipe is: compressor 1 - condenser 2 - battery cooling branch 4 - compressor 1; battery cooling back branch road 4—Battery temperature adjustment module 5—Second battery 62—Battery temperature adjustment module 5—Battery cooling branch 4.

The cooling power of the battery temperature regulating module 5 is provided by the vehicle air conditioner, and the cooling capacity is shared with the in-vehicle refrigeration system, thereby reducing the volume of the temperature regulating system and making the distribution of the coolant flow more flexible. Thereby, the heating power and the cooling power of each battery can be precisely controlled according to the actual state of each battery, thereby adjusting the temperature when the vehicle battery temperature is too high or too low, so that the temperature of the vehicle battery is maintained at a preset range. To avoid the situation where the performance of the vehicle battery is affected by temperature.

Further, according to an embodiment of the present invention, as shown in FIGS. 4 and 5, the battery cooling branch 4 may include a heat exchanger 41 including a first duct and a second duct, and a second duct The first pipe is connected to the compressor 1 , and the first pipe and the second pipe are adjacent to each other.

The battery temperature adjustment module 5 may include a flow path (not specifically shown) for adjusting the temperature of the battery, and the flow path is disposed in the battery 6. A pump 51, a medium container 52, a heater 53, and a controller (not specifically shown) are connected between the flow path and the heat exchanger 41. Wherein, the controller respectively obtains the temperature adjustment required power P1 of the battery 6 in parallel and the temperature adjustment actual power P2 of the battery, and adjusts the required power P1 and the temperature adjustment actual power P2 according to the temperature of each battery to each battery 6 respectively. The temperature is adjusted. The in-vehicle cooling branch 3 may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33. The battery cooling branch 4 may also include a second expansion valve 42 and a second electronic valve 43.

It can be understood that the battery cooling branch 4 may not be provided with the heat exchanger 41. When there is no heat exchanger 41, the refrigerant flowing in the battery cooling branch 4 is the refrigerant. If the heat exchanger 41 is provided, the refrigerant flows in the first pipe in the battery cooling branch 4, the coolant flows in the second pipe, and the refrigerant flows in the cooling circuit in the vehicle.

According to an embodiment of the present invention, as shown in FIG. 9, the battery temperature adjustment module 5 further includes a first temperature sensor 55 disposed at an inlet of the flow path, and a second temperature sensing disposed at an outlet of the flow path. The device 56, as well as the flow rate sensor 57. It will be appreciated that the inlet and outlet locations of the flow path are not absolute, but are determined based on the steering of the pump 51.

Specifically, the controller may include a battery management controller, a battery thermal management controller, and a vehicle air conditioning controller. The battery thermal management controller can be electrically connected to the pump 51, the first temperature sensor 51, the second temperature sensor 52, and the flow rate sensor 57, and obtain a plurality of parallels according to the specific heat capacity of the medium and the density of the medium. The temperature of the battery adjusts the actual power P2 and controls the rotational speed of the pump 51. The battery management controller collects the current flowing through the battery, the temperature of the battery itself, and obtains the temperature adjustment demand power P1 according to the target temperature of the battery, the target time t, the specific heat capacity C of the battery, the quality M of the battery, and the internal resistance R of the battery. And control the vehicle air conditioner controller to start or stop working. The vehicle air conditioner controller is electrically connected with the compressor 1, the expansion valve and the electronic valve to control the power P and the expansion of the compressor according to the temperature adjustment required power P1 obtained by the battery management controller and the temperature adjustment actual power P2 obtained by the battery thermal management controller. The opening and closing of the valve and the electronic valve achieve the purpose of controlling the amount of heat exchange.

The heat exchanger 41 can be a plate heat exchanger, and the plate heat exchanger can be installed inside the vehicle air conditioner, so that the entire refrigerant circuit is inside the vehicle air conditioner, which facilitates the factory debugging of the vehicle air conditioner, and enables the vehicle air conditioner to be separately supplied and assembled. At the same time, the vehicle air conditioner only needs to be refilled once in the installation procedure.

The coolant flows into the inside of the battery 6 from the inlet of the flow path, and flows out from the outlet of the flow path, thereby achieving heat exchange between the battery 6 and the cooling liquid.

The pump 51 is mainly used to provide power. The medium container 52 is mainly used for storing the coolant and receiving the coolant added to the temperature regulation system. When the coolant in the temperature regulation system is reduced, the coolant in the medium container 52 can be automatically replenished. . The heater 53 can be a PTC (Positive Temperature Coefficient, a semiconductor material or component having a large positive temperature coefficient), and can perform CAN (Controller Area Network) communication with the controller. Provides heating power for the on-board battery temperature regulation system, controlled by the controller. That is, the heater 53 is not directly in contact with the battery 6, and has high safety, reliability, and practicability.

The first temperature sensor 55 is configured to detect the temperature of the coolant at the flow path inlet, and the second temperature sensor 56 is configured to detect the temperature of the coolant at the flow path outlet. The flow rate sensor 57 is used to detect the flow rate information of the coolant in the pipe in the temperature regulation system. The first electronic valve 33 is used to control the opening and closing of the in-vehicle cooling branch 3, and the first expansion valve 32 can be used to control the flow rate of the coolant in the in-vehicle cooling branch 3. The second electronic valve 43 is used to control the opening and closing of the battery cooling branch 4, and the second expansion valve 42 can be used to control the flow of the coolant in the battery cooling branch 4. A valve 58 is also provided at the flow path inlet of each battery 6. The controller can control the flow rate of the coolant flowing into each of the batteries 6 through the control valves 58 in accordance with P1 and P2 corresponding to each of the batteries 6, so that the heating power/cooling power of each of the batteries 6 can be accurately controlled. According to an embodiment of the present invention, the controller is further configured to generate a total temperature adjustment required power Pz according to the temperature adjustment required power P1 of the plurality of parallel batteries, and determine whether the total temperature adjustment required power Pz matches the maximum cooling power P of the vehicle air conditioner. Wherein, if matched, the controller cools the battery 6 in parallel according to the temperature adjustment required power P1 of the plurality of parallel batteries. If there is no match, the controller cools the battery 6 in parallel according to the maximum cooling power P of the air conditioner and the temperature adjustment required power P1 of the plurality of parallel batteries.

Specifically, as shown in FIG. 9, the controller can calculate the total temperature adjustment required power Pz of the entire temperature adjustment system according to the temperature adjustment required power P1 of each battery, that is, add the temperature adjustment required power P1 of each battery. The total temperature adjustment required power Pz can be obtained. Then, according to the total temperature adjustment demand power Pz, it is judged whether Pz matches the maximum cooling power P of the vehicle air conditioner, that is, whether Pz is less than or equal to P, and if so, the controller adjusts the required power P1 according to the temperature of each battery through the control valve 58. Or control the power of the compressor 1 to cool each battery. If P _Z does not match the maximum cooling power P of the vehicle air conditioner, that is, Pz is greater than P, the controller adjusts the required power P1 according to the maximum cooling power P of the air conditioner and the temperature of each battery, and proportionally adjusts the opening degree of the valve 58. Coolant flow distribution is performed so that each battery 6 can be cooled down with maximum efficiency.

The following describes how the battery temperature adjustment module 5 acquires the temperature adjustment required power P1 and the temperature adjustment actual power P2 of each battery 6 in conjunction with specific embodiments.

According to an embodiment of the present invention, the controller may be configured to separately acquire a first parameter when each battery is turned on, and generate a first temperature adjustment required power of each battery according to the first parameter, and acquire each battery separately. a second parameter at the time of temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter, and adjusting the required power according to the first temperature of each battery and the second temperature adjustment required power of each battery The temperature adjustment of each battery requires power P1.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery 6 is turned on, and a target time t from the initial temperature to the target temperature, and the controller acquires between the initial temperature and the target temperature. The first temperature difference ΔT ₁ , and the first temperature adjustment required power is generated according to the first temperature difference ΔT ₁ and the target time t.

Further, the controller generates the first temperature adjustment required power by the following formula (1): ΔT ₁ *C*M/t (1), where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery 6, and M is the quality of the battery 6.

The second parameter is the average current I of each battery 6 within a preset time, and the controller generates a second temperature adjustment required power by the following formula (2): I ² *R, (2), where I is the average current, R is the internal resistance of the battery 6.

When the battery 6 is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery 6 is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the invention, the controller generates a second temperature difference ΔT ₂ according to the inlet temperature detected by the first temperature sensor 55 and the outlet temperature detected by the second temperature sensor 56, respectively, and according to each battery The second temperature difference ΔT ₂ and the flow rate v detected by the flow rate sensor 57 produce a temperature-regulated actual power P2 for each battery.

Further, according to an embodiment of the present invention, the actual power P2 is adjusted according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is in the flow path The specific heat capacity of the coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow path The cross-sectional area.

Specifically, after the vehicle is powered on, the battery management controller determines whether the vehicle needs to perform temperature adjustment. If it is determined that the vehicle needs temperature adjustment, for example, the temperature of the battery 6 is too high, the information of the temperature adjustment function is sent to the vehicle air conditioner through the CAN communication. After the vehicle air conditioner controller turns on the temperature adjustment function, the heat exchange information is sent to the battery thermal management controller, and the vehicle controller controls the second electronic valve 43 to be turned on, and the battery thermal management controller controls the pump 51 to start at the default speed (such as the low speed). jobs.

At the same time, the battery management controller acquires the initial temperature (ie, the current temperature) of each battery 6, the target temperature, and the target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t can be preset according to actual conditions, and The first temperature adjustment required power of each battery is calculated according to formula (1). At the same time, the battery management controller also obtains the average current I of the battery 6 for a preset time, and calculates the second temperature adjustment required power of each battery according to the formula (2). Then, the battery management controller calculates the temperature adjustment required power P1 according to the first temperature adjustment required power and the second temperature adjustment required power of each battery 6 (that is, the required power of the battery 6 is adjusted to the target temperature within the target time), Here, when the battery 6 is cooled, P1 = ΔT ₁ * C * M / t + I ² * R, and when the battery 6 is heated, P1 = ΔT ₁ * C * M / tI ² * R.

Moreover, the battery thermal management controller acquires the first temperature sensor 55 and the second temperature sensor 56 corresponding to each battery to detect the temperature information, and respectively obtains the flow rate information detected by the flow rate sensor 57, according to Equation (3) calculates the temperature-adjusted actual power P2 of each battery 6, respectively.

Finally, the vehicle air conditioner controller controls the flow rate of the coolant flowing into each of the batteries 6 through the control valve 58 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 corresponding to each battery 6, so that the heating of each battery 6 can be accurately controlled. Power / cooling power. For example, if the temperature adjustment required power P1 of the first battery 61 is greater than the temperature adjustment required power P1 of the second battery 62, the controller may control to increase the opening degree of the valve 58 of the circuit in which the first battery 61 is located, and reduce the second battery. 62 The opening of the valve 58 of the circuit in which it is located.

If the temperature of the battery 6 is low, the vehicle air conditioner controller controls the second electronic valve 43 to be turned off, the battery thermal management controller controls the heater 53 to be activated, and the battery thermal management controller adjusts the required power P1 and the temperature to adjust the actual power P2 according to the temperature. The heating power of the heater 53 is controlled to raise the temperature of the battery 6 to the target temperature within the target time t, preventing the excessive temperature from affecting the performance of the battery 6. Thereby, it is possible to ensure that the heating power and the cooling power of each battery are accurately controlled according to the actual state of each battery in the target time, thereby adjusting the temperature when the vehicle battery temperature is too high or too low.

Specifically, it can be seen from the above embodiment that the temperature adjustment required power P1 is composed of two parts. Taking the first battery 61 as an example, when the first battery 61 needs to be cooled, the initial temperature of the first battery 61 is 45 ° C, and the target temperature is At 35 ° C, the heat required to dissipate the battery from 45 ° C to 35 ° C is fixed and can be directly calculated by the formula (1), ΔT ₁ *C*M/t. At the same time, the first battery 61 has a discharge and charging procedure in the cooling process, and the program generates heat. This part of the heat can also be directly obtained by detecting the average current I of the first battery, by formula (3), ie, I ^{2 .} *R, directly calculate the heating power of the current first battery 61, that is, the second temperature adjustment required power. The cooling completion time of the present invention is set based on the target time t (t can be changed according to user needs or the actual design of the vehicle). After determining the target time t required for the completion of the cooling, it is possible to estimate the temperature adjustment required power P1 required for the cooling of the first battery 61, P1 = ΔT ₁ * C * M / t + I ² * R. On the other hand, if the heating function is activated, the temperature adjustment required power P1=ΔT ₁ *C*M/tI ² *R, that is, in the heating process of the first battery 61, the discharge or charging current of the first battery 61 is larger. The required heating power, that is, the temperature adjustment required power P1 is smaller.

Since the discharge of the electric first battery 61 or the charging current is varied, I ² *R is varied, so in order to better ensure the accuracy of the cooling time, the cooling power also depends on the current average of the first battery 61. The discharge changes or changes in the charging current. If the vehicle air conditioner simultaneously cools the first battery 61 and the cabin, when the discharge current of the first battery 61 is small, the I ² *R is reduced, and at this time, more cooling power can be distributed to the passenger compartment, so that The cabin reaches the set temperature faster. Meanwhile, when the discharge or charging current of the first battery 61 is large, I ² *R is large, and at this time, the vehicle air conditioner can allocate more cooling power to the first battery 61. Through such adjustment, the time required for cooling the battery is always accurate, and at the same time, the cooling power of the vehicle air conditioner can be utilized more efficiently, without having to configure the vehicle air conditioner with a large cooling power, resulting in waste of cooling power.

The cooling time of the battery is affected by the cooling efficiency. Since the cooling efficiency is affected by the external ambient temperature and the current temperature of the battery, in the process of cooling the first battery 61, the efficiency of the temperature regulating system is also constantly changing, so the cooling efficiency cannot be 100. Therefore, it is necessary to detect the temperature adjustment actual power P2 of the first battery 61 only based on the fact that P1 cannot accurately adjust the cooling time of the first battery 61. In the present invention, the temperature-adjusted actual power P2 of the first battery 62 can be calculated by the formula (3), that is, ΔT2*c*m. P2 can also be actually cooled by the battery, which can be calculated by the formula (4), that is, ΔT3*C*m1, where ΔT3 is the temperature change of the first battery 61 in a certain period of time, and C is the first battery 61. The specific heat capacity, m1 is the quality of the first battery 61. However, since the quality of the general battery is large, the temperature change per unit time is not obvious, and it takes a long time to detect the temperature difference, so the actual temperature P2 is generally calculated according to the formula (3).

When the second battery 62 needs to be temperature-adjusted, the temperature adjustment required power P1 and the temperature-regulated actual power P2 are acquired in the same manner as the first battery 61 described above, and are not described herein again.

Due to the cooling efficiency, the temperature adjustment actual power P2 is hardly equal to the temperature adjustment demand power P1. In order to make the cooling target time t of each battery 6 more accurate, it is necessary to adjust the required power P1 and the temperature adjustment actual power P2 according to the temperature. The power difference between them is adjusted to ensure that the temperature adjustment required power P1 of the battery 6 is equal to the temperature adjustment actual power P2 of the battery.

How to adjust the temperature of each battery 6 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of each battery 6 will be described below in conjunction with specific embodiments.

According to an embodiment of the present invention, the controller is further configured to detect a temperature of the plurality of parallel batteries, and control the temperature adjustment system to enter when the temperature of at least one of the plurality of parallel batteries 6 is greater than the first temperature threshold. The cooling mode, and when the temperature of at least one of the plurality of parallel batteries 6 is less than the second temperature threshold, controls the temperature adjustment system to enter the heating mode. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the battery management controller instantly detects the temperature of each battery 6 and makes a determination. If the temperature of one of the batteries 6 is higher than 40 ° C, the temperature of the battery 6 is too high at this time, in order to avoid the influence of the high temperature on the performance of the battery 6, the battery 6 needs to be cooled, and the battery management controller controls The temperature adjustment system enters the cooling mode, and sends a battery cooling function startup information to the vehicle air conditioner controller, and the vehicle air conditioner controller controls the second electronic valve 43 to open after receiving the battery cooling function activation information, so that the coolant and the battery 6 are heated. Exchange to lower the temperature of the battery 6. As shown in FIG. 9, when the temperature adjustment system operates in the cooling mode, the flow directions of the coolants in the corresponding first pipe and the second pipe in the circuit where the first battery 61 is located are: compressor 1 - condenser 2 - Second electronic valve 43 - second expansion valve 42 - heat exchanger 41 - compressor 1; medium container 52 - heat exchanger 41 - heater 53 (closed) - pump 51 - valve 58 - first temperature sensor 55—First Battery 61—Second Temperature Sensor 56—Flow Sense Sensor 57—The media container 52, thus looped, exchanges heat at the heat exchanger 41 to effect cooling of the first battery 61. The flow directions of the coolant in the first pipe and the second pipe in the circuit where the second battery 62 is located are: compressor 1 - condenser 2 - second electronic valve 43 - second expansion valve 42 - heat exchanger 41 - compressor 1; medium container 52 - heat exchanger 41 - heater 53 (off) - pump 51 - valve 58 - first temperature sensor 55 - second battery 62 - second temperature sensor 56 - flow rate sensor 57 - The medium container 52 is circulated in such a manner that heat is exchanged at the heat exchanger 41 to achieve temperature reduction of the second battery 62.

If the temperature of a certain battery 6 is lower than 0 ° C, the temperature of the battery 6 is too low at this time, in order to avoid the influence of the low temperature on the performance of the battery 6, the battery 6 needs to be warmed up, and the battery management controller controls The temperature adjustment system enters the heating mode and sends a battery heating function to start the information to the vehicle air conditioner controller. The vehicle air conditioner controller controls the second electronic valve 43 to be turned off after receiving the battery heating function activation information, and the battery thermal management controller controls the heater 53 to be turned on to provide heating power to the temperature regulation system. When the temperature adjustment system operates in the heating mode, the flow directions of the coolant in the first battery 61 and the second battery 62 are respectively: the medium container 52 - the heat exchanger 41 - the heater 53 (open) - the pump 51 - the valve 58 - first temperature sensor 55 - first battery 61 - second temperature sensor 56 - flow rate sensor 57 - medium container 52; medium container 52 - heat exchanger 41 - heater 53 (on) - pump 51—First Temperature Sensor 55—Second Battery 62—Second Temperature Sensor 56—Flow Rate Sensor 57—Media Container 52, thus looping, to achieve temperature rise of battery 6. It will be appreciated that by adjusting the opening of the valve 58, the flow of coolant into each of the cells 6 can be adjusted to adjust the heating/cooling power of each battery.

According to an embodiment of the present invention, when the temperature adjustment system operates in the cooling mode, the controller acquires the temperature adjustment requirement of the battery when the temperature adjustment required power P1 of the certain battery 6 is greater than the temperature adjustment actual power P2 corresponding to the battery. The power difference between the power P1 and the temperature adjustment actual power P2 increases the power of the compressor for cooling the battery 6 according to the power difference, or increases the coolant flow rate of the battery 6, to increase the cooling power of the battery 6, and at some When the temperature adjustment required power P1 of the battery 6 is less than or equal to the temperature adjustment actual power P2, the power of the compressor is reduced or the power of the compressor is kept constant, or the cooling liquid flow of the battery is adjusted to reduce the cooling power of the battery 6. .

Specifically, if the battery 6 is plural and connected in parallel, when the temperature adjustment system operates in the cooling mode, the battery management controller acquires the temperature adjustment required power P1 of the battery, and the battery thermal management controller acquires the temperature adjustment actual power P2 of the battery. The vehicle air conditioner controller judges according to the temperature adjustment demand power P1 and the temperature adjustment actual power P2. If the temperature adjustment required power P1 of one of the batteries 6 is greater than the actual temperature adjustment power P2, it means that if the cooling of the battery 6 cannot be completed within the target time according to the current cooling power or the coolant flow rate, the vehicle air conditioner controller obtains The temperature of the battery adjusts the power difference between the required power P1 and the temperature adjusted actual power P2, and increases the power of the compressor 1 according to the power difference, or increases the coolant flow rate of the battery, that is, increases the opening degree of the second expansion valve 42. To increase the cooling power of the battery, wherein the greater the power difference between the temperature adjustment demand power P1 and the temperature adjustment actual power P2, the more the power of the compressor 1 and the coolant flow rate of the battery increase, so that the temperature of the battery It is lowered to the target temperature within the preset time t. And if the temperature adjustment required power P1 of one of the batteries 6 is less than or equal to the temperature adjustment actual power P2, the vehicle air conditioner controller can keep the power of the compressor 1 constant or appropriately reduce the power of the compressor 1, or reduce the battery. The coolant flow rate, that is, the opening degree of the second expansion valve 42, is reduced to reduce the cooling power of the battery. When the temperature of all the batteries 6 is lower than 35 ° C, the battery 6 is cooled, the battery management controller transmits information for turning off the temperature adjustment function to the vehicle air conditioner through the CAN communication, and the vehicle air conditioner controller controls the second electronic valve 43 to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery 6 is higher than 35 ° C, the cooling power of the battery is appropriately increased to allow the battery to complete the cooling as soon as possible.

According to an embodiment of the present invention, when the temperature adjustment system operates in the heating mode, the controller acquires the temperature adjustment required power P1 and the temperature adjustment of the battery when the temperature adjustment required power P1 of a certain battery is greater than the temperature adjustment actual power P2. The power difference between the actual power P2, and the power of the heater 53 for heating the battery is increased according to the power difference, or the coolant flow rate of the battery is increased to increase the heating power of the battery, and the temperature adjustment requirement of a certain battery. When the power P1 is less than or equal to the temperature adjustment actual power P2, the power is reduced, or the power of the heater 53 is kept constant, or the cooling liquid flow of the battery is adjusted to reduce the heating power of the battery.

Specifically, if the battery is plural and connected in parallel, the battery management controller acquires the temperature adjustment required power P1 of the battery when the temperature adjustment system operates in the heating mode, and the battery thermal management controller acquires the temperature adjustment actual power P2 of the battery. If the temperature adjustment demand power P1 of one of the batteries 6 is greater than the temperature adjustment actual power P2, it means that if the temperature of the battery 6 cannot be completed within the target time according to the current heating power or the coolant flow rate, the battery thermal management controller Obtaining a power difference between P1 and P2 of the battery, and increasing the power of the heater 53 for heating the battery 6 according to the power difference, or adjusting the coolant flow rate of the battery, for example, the rotation speed of the pump 51 can be increased, so that The battery can be temperature adjusted within the target time. Wherein, the greater the difference between the temperature adjustment demand power P1 and the temperature adjustment actual power P2, the more the power of the heater 53 and the coolant flow rate of the battery circuit increase. And if the temperature adjustment required power P1 of a battery is less than or equal to the temperature adjustment actual power P2, the controller may appropriately reduce the power of the heater 53, or keep the power of the heater 53 unchanged, or adjust to reduce the cooling of the battery circuit. Liquid flow to reduce the heating power of the battery. When the temperature of all the batteries 6 is higher than the preset temperature, for example, 10 ° C, the battery 6 is heated, the battery management controller sends the information of the temperature adjustment function to the vehicle air conditioner through the CAN communication, and the battery thermal management controller controls the heater 53 to be turned off. . If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery 6 is still lower than 10 ° C, the battery thermal management controller can appropriately increase the power of the heater 53 and the rotation speed of the pump 51. In order to complete the temperature rise of the battery as soon as possible.

According to an embodiment of the present invention, the controller is further configured to reduce the rotation speed of the pump 51 when the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, and adjust the temperature requirement of a certain battery. When the power P1 is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump 51 is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the temperature adjustment required power P1 of a certain battery 6 is smaller than the temperature adjustment actual power P2, the controller controls the rotation speed of the pump 51 to be reduced to save electric energy. If the temperature adjustment demand power P1 of a certain battery 6 is greater than the temperature adjustment actual power P2, the controller controls the pump 51 in addition to controlling the power of the heater 53, the compressor 1, or the coolant flow rate of the circuit in which the battery is located. The increase of the rotational speed can increase the quality of the coolant flowing through the cross section of the cooling flow path per unit time, thereby increasing the temperature adjustment actual power P2 of the battery to achieve temperature adjustment within the target time t.

If the single compressor 1 cannot meet the power required to cool the plurality of batteries 6, the plurality of compressors 1 can be provided to provide cooling power to the battery 6. For example, on a bus, there are usually four compressors, and all four compressors can be used to provide cooling power to the battery 6.

According to an embodiment of the present invention, if there are a plurality of compressors 1 for supplying a refrigerant to a battery, the controller is further configured to adjust the required power P1 according to the temperature of each battery and the maximum cooling power P of each compressor. The number of compressors started, and when the temperature regulation system is in the cooling mode, controls the corresponding number of compressors 1 to start.

Further, the controller may generate the total temperature adjustment required power Pz according to the temperature adjustment required power P1 of each battery, and the controller controls the plurality of compressors 1 when determining that the total temperature adjustment required power Pz is greater than the maximum cooling power P of the single compressor Start at the same time.

For example, when there are two compressors 1 that supply refrigerant to the plurality of batteries 6, when the temperature adjustment system enters the cooling mode, the controller acquires P1 of each battery 6 and adds P1 of each battery. The total temperature regulation required power Pz of the entire temperature regulation system is calculated. If Pz is less than or equal to the maximum cooling power of the single compressor 1, the controller controls a compressor 1 to be started. And if Pz is greater than the maximum cooling power of the single compressor 1, the controller controls the two compressors 1 to simultaneously start operation to meet the cooling and cooling power demand of the battery 6.

In order to make the present invention more clearly understood by those skilled in the art, the working procedure of the temperature regulation system of the vehicle battery shown in FIG. 9 will be described below in conjunction with a specific embodiment.

The battery 6 includes a first battery 61 and a second battery 62, Pz=P11+P12, P11 is the temperature adjustment required power of the first battery 61, P12 is the required power for the temperature adjustment of the second battery 62, and Pz is the first battery 61 and The temperature of the second battery 62 is adjusted to the sum of the required power (total temperature adjustment demand power Pz). Pf=P21+P22, P21 is the temperature-adjusted actual power of the battery 61, P22 is the temperature-adjusted actual power of the battery 62, and Pf is the sum of the temperature-regulated actual powers of the first battery 61 and the second battery 62.

When the temperature of a battery is greater than the first temperature threshold (for example, 40 ° C), the temperature regulation system of the vehicle battery operates in the cooling mode, if the sum of the total temperature adjustment demand power Pz and the interior cooling demand power P4 is less than the maximum compressor The cooling power P, that is, Pz + P4 ≤ P, controls the compressor 1 to operate in accordance with the Pz + P4 cooling power. It can be understood that Pz<P, P4<P in this case.

If Pz+P4>P, it is judged whether the temperature of the first battery 61 or the second battery 62 is greater than 45° C., if it is greater than 45° C., the cooling power is preferentially provided for battery cooling, and the controller controls the compressor 1 according to the maximum cooling power P. In operation, the cooling power of the battery cooling branch 4 is Pz, and the cooling power of the in-vehicle cooling branch 3 is equal to P-Pz.

If it is determined that the battery temperature is not greater than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the interior of the vehicle, the compressor 1 is operated according to the maximum cooling power P, and the cooling power of the cooling branch of the vehicle is P4, the battery The cooling power of the cooling branch is equal to P-P4. The first battery 61 cooling branch and the second battery 62 cooling branch scale down the cooling power. The ratio can be: (P-P4) / (P11 + P12). If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied.

The sum of the temperature-regulated actual powers of the first battery 61 and the second battery 62 is Pf, and when Pz>Pf, the power to be adjusted is Pc (Pc=Pz-Pf). If Pz + P4 + Pc ≤ P, the compressor needs to increase the cooling power to Pc, increase the opening degree of the second expansion valve 42, and increase the rotation speed of the pump 51. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the second battery 62 is reduced.

If Pz+P4+Pc>P (and Pz+Pc≤P), the following determination is made: It is judged whether the temperatures of the first battery 61 and the second battery 62 are greater than 45 °C. If it is greater than 45 ° C, the cooling power is preferentially provided for battery cooling, the compressor operates according to the maximum cooling power, and the rotation speed of the pump 51 is increased, the cooling power of the battery cooling branch is increased by Pc, and the cooling power of the vehicle is reduced by Pc. If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the second battery 62 is reduced.

If the battery temperature is not more than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the vehicle, the compressor operates according to the maximum cooling power P, the rotation speed of the pump 51 is increased, and the cooling of the cooling branch in the vehicle is performed. The power is P4, and the cooling power of the battery cooling branch is equal to P-P4. The first battery 61 cooling branch and the second battery 62 cooling branch scale down the cooling power. The ratio can be: (P-P4) / (P11 + P12). The cooling power of the first battery 61 is P11*(P-P4)/(P11+P12), and the cooling power of the second battery 62 is P12*(P-P4)/(P11+P12).

If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied, the compressor operates at the maximum power P, the opening degree of the second expansion valve 42 is increased, and the rotation speed of the pump 51 is increased, so that the cooling power of the battery cooling branch circuit is increased. Pc. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the second battery 62 is reduced.

When Pz ≤ Pf, when the power to be adjusted is Pc (Pc = Pf - Pz), the compressor cooling power is maintained, or the cooling power of the compressor is lowered, or the opening degree of the second expansion valve 42 is decreased, or Reduce the speed of the pump 51. If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the second battery 62 is reduced.

When the compressor 1 for supplying cooling power to the battery is plural, and the sum of the maximum cooling powers of the plurality of compressors is P5, the battery cooling power adjustment may be: (1) When Pz>Pf, the power to be adjusted is required. For Pc(Pc=Pz-Pf), if Pz+P4+Pc≤P5, the compressor needs to increase the cooling power to Pc, increase the opening of the second expansion valve, and increase the pump speed. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the battery 62 is reduced.

If Pz+P4+Pc>P5 (and Pz+Pc≤P5), the following judgment is made: It is judged whether the battery temperature is greater than 45 °C. If it is greater than 45 ° C, the cooling power is preferentially provided for battery cooling, the compressor operates according to the maximum cooling power, and the rotation speed of the water pump is increased, the cooling power of the battery cooling branch is increased by Pc, and the power of the cooling branch of the vehicle is decreased by Pc.

If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the second battery 62 is reduced.

If the battery temperature is not more than 45 ° C, and the temperature inside the car has not reached the set temperature, the cooling power is preferentially provided for the vehicle. All the compressors are operated according to the maximum cooling power, and the water pump speed is increased, and the cooling power of the cooling branch in the vehicle is increased. For P4, the cooling power of the battery cooling branch = P5-P4. The first battery 61 cooling branch and the second battery 62 cooling branch scale down the cooling power. The ratio can be: (P5-P4) / (P11 + P12). The cooling power of the first battery 61 is P11*(P5-P4)/(P11+P12), and the cooling power of the second battery 62 is P12*(P5-P4)/(P11+P12).

If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied, all the compressors are operated at the maximum power, the opening degree of the second expansion valve is increased, and the water pump speed is increased, so that the cooling power of the battery cooling branch circuit is increased by Pc. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the battery 62 is reduced.

(2) When Pz ≤ Pf, and the power to be adjusted is Pc (Pc = Pf - Pz), the compressor cooling power is maintained, or the cooling power of the compressor is lowered, or the opening degree of the second expansion valve 42 is decreased. , or reduce the speed of the pump 51. If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the cooling power of the battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the cooling power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the cooling power of the second battery 62 is reduced.

When the temperature of the vehicle battery is less than the second temperature threshold (for example, 0 ° C), when the temperature adjustment system of the vehicle battery operates in the heating mode, if Pz>Pf, the power to be adjusted is Pc (Pc=Pz-Pf), heating The heating power of the unit 53 is increased by Pc to increase the rotational speed of the pump 51. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the heating power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the heating power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the heating power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the heating power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the heating power of the second battery 62 is reduced.

If Pz ≤ Pf, and the power to be adjusted is Pc (Pc = Pz - Pf), the power of the heater remains unchanged, or the heating power Pc is reduced, or the pump rotation speed is lowered. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the heating power of the first pool 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the heating power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the heating power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the heating power of the battery 62 is reduced.

In order to balance the temperatures of the first battery 61 and the second battery 62, the following processing may be performed: In the battery cooling process, if the battery temperature difference between the temperature T61 of the first battery 61 and the temperature T62 of the second battery 62 is different Above 3 ° C, the temperature value is a preset value, that is, if T61-T62>3 ° C, the battery thermal management controller controls the opening degree of the regulating valve 58 in the cooling branch of the first battery 61 to increase, and controls the second battery 62 to cool. The opening degree of the regulating valve 58 in the branch is reduced to increase the cooling power of the first battery 61, and the cooling power of the second battery 62 is reduced, thereby achieving temperature equalization of the first battery 61 and the second battery 62. And if T62-T61>3° C., the battery thermal management controller controls the opening degree of the regulating valve 58 in the cooling branch of the second battery 62 to increase, and controls the opening degree of the regulating valve 58 in the cooling branch of the first battery 61 to decrease, In order to increase the cooling power of the second battery 62, the cooling power of the first battery 61 is reduced, thereby achieving temperature equalization of the first battery 61 and the second battery 62.

In the battery heating process, if the battery temperature difference between the first battery 61 and the second battery 62 exceeds 3 ° C, that is, if T61-T62 > 3 ° C, the battery thermal management controller controls the battery 61 in the cooling branch The opening degree of the regulating valve 58 is decreased, and the opening degree of the regulating valve 58 in the cooling branch of the control battery 62 is increased to reduce the heating power of the first battery 61, and the heating power of the second battery 62 is increased, thereby realizing the first battery. The temperature of 61 and second battery 62 is equalized. If T62-T61>3°C, the battery thermal management controller controls the opening of the regulating valve 58 in the cooling branch of the battery 62 to decrease, and controls the opening degree of the regulating valve 58 in the cooling branch of the battery 61 to increase The heating power of one battery 61 is increased, and the heating power of the second battery 62 is decreased, thereby achieving temperature equalization of the first battery 61 and the second battery 62.

According to the temperature regulation system of the vehicle battery according to the embodiment of the present invention, the temperature adjustment required power and the temperature adjustment actual power of the plurality of parallel batteries are obtained through the battery temperature adjustment module, and the required power and temperature are respectively adjusted according to the temperature of the plurality of parallel batteries. Adjusting the actual power adjusts the temperature of the battery in parallel. Therefore, the system can precisely control the heating power and cooling power of each battery according to the actual state of each battery, and adjust the temperature when the battery temperature is too high or too low, so that the temperature of the battery is maintained at a preset range. To avoid the situation where the performance of the vehicle battery is affected by temperature.

Fig. 10 is a flow chart showing a temperature adjustment method of a vehicle battery according to a sixth embodiment of the present invention. The vehicle battery includes a plurality of batteries connected in parallel. As shown in FIG. 10, the temperature adjustment method of the vehicle battery includes the following steps: s1, respectively obtaining the temperature adjustment required power P1 of the plurality of parallel batteries.

Further, according to an embodiment of the present invention, respectively obtaining the temperature adjustment required power P1 of the plurality of parallel batteries includes: acquiring the first parameter when the opening temperature of each battery is separately adjusted, and generating each battery according to the first parameter. The first temperature regulates the required power. A second parameter of each battery during temperature adjustment is separately obtained, and a second temperature adjustment required power of each battery is generated according to the second parameter. The temperature adjustment required power P1 of each battery is generated according to the first temperature adjustment required power of each battery and the second temperature adjustment required power of each battery, respectively.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the first parameter is generated according to the first parameter. A temperature adjustment required power specifically includes: obtaining a first temperature difference ΔT ₁ between the initial temperature and the target temperature. The first temperature adjustment required power P1 is generated based on the first temperature difference ΔT ₁ and the target time t.

Further, according to an embodiment of the present invention, the first temperature adjustment required power is generated by the following formula (1): ΔT ₁ *C*M/t, (1) where ΔT ₁ is between the initial temperature and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is the average current I of each battery cell for a preset time, and the second temperature adjustment required power of each battery is generated by the following formula (2): I ² *R, ( 2) where I is the average current and R is the internal resistance of the battery.

S2, respectively obtaining the temperature-regulated actual power P2 of the plurality of parallel batteries.

According to an embodiment of the present invention, respectively obtaining the temperature-regulated actual power P2 of the plurality of parallel batteries includes: obtaining an inlet temperature and an outlet temperature of a flow path for adjusting each battery temperature, and obtaining a flow rate of the coolant inflow path v. A second temperature difference ΔT ₂ is generated according to the inlet temperature and the outlet temperature of the flow path of each battery. The temperature adjustment actual power P2 is generated according to the second temperature difference ΔT ₂ and the flow rate v of each battery.

Further, according to an embodiment of the present invention, the temperature-adjusted actual power P2 is generated according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is the flow path The specific heat capacity of the medium coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow The cross-sectional area of the road.

S3, adjusting the temperature of the plurality of parallel batteries according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the plurality of parallel batteries.

According to an embodiment of the present invention, the battery temperature adjustment module is controlled to adjust the temperature of the battery to achieve the target temperature within the target time t according to the temperature adjustment required power P1 and the temperature adjustment actual power P2.

Specifically, after the vehicle is powered on, it is determined whether the battery needs to be temperature-regulated, and if it is determined, the initial temperature (ie, the current temperature) of each battery, the target temperature, and the target time t from the initial temperature to the target temperature are respectively acquired, wherein the target The temperature and the target time t can be preset according to actual conditions, and the first temperature adjustment required power is calculated according to formula (1). At the same time, the average current I of each battery in a preset time is respectively obtained, and the second temperature adjustment required power of each battery is separately calculated according to formula (2). Then, according to the first temperature adjustment required power and the second temperature adjustment required power of each battery, respectively, the temperature adjustment required power P1 of each battery (that is, the required power of the battery is adjusted to the target temperature) is calculated. And, respectively, the inlet temperature and the outlet temperature of each battery are obtained, and the flow velocity information is obtained, and the actual temperature adjustment power P2 of each battery is calculated according to formula (3). Finally, the temperature of the battery is adjusted according to P1 and P2 of each battery, respectively. Therefore, the control method can accurately control the heating power and the cooling power of each battery according to the actual state of each battery, and adjust the temperature when the battery temperature is too high or too low, so that the temperature of the battery is maintained at a preset. Scope to avoid the situation where the performance of the vehicle battery is affected by temperature.

How to adjust the temperature of the battery according to the temperature adjustment demand power P1 and the temperature adjustment actual power P2 of the battery will be described below with reference to specific embodiments.

When the vehicle battery includes a plurality of parallel batteries, according to an embodiment of the present invention, as shown in FIG. 8, the battery temperature adjustment module is respectively performed according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the plurality of parallel batteries. Controlling to adjust the temperature of the battery may further include: generating a total temperature adjustment required power Pz according to the temperature adjustment demand power P1 of the plurality of parallel batteries. It is judged whether the total temperature adjustment required power Pz matches the maximum cooling power P of the vehicle air conditioner. If they match, the battery is adjusted in accordance with the temperature regulation demand power P1 of the plurality of parallel batteries for a plurality of parallel batteries. If they do not match, the battery is cooled in accordance with the maximum cooling power P of the air conditioner and the temperature adjustment demand power P1 of the plurality of parallel batteries.

Specifically, the total temperature adjustment required power Pz of the entire temperature adjustment system can be calculated according to the temperature adjustment required power P1 of each battery, that is, the temperature adjustment required power P1 of each battery is added to obtain the total temperature adjustment required power Pz. Then, according to the total temperature, the required power Pz is adjusted to determine whether Pz matches the maximum cooling power P of the vehicle air conditioner, that is, whether Pz is less than or equal to P, and if so, the required power P1 is adjusted according to the temperature of each battery to flow into each by control. Each battery is cooled by the coolant flow of the battery and by controlling the power of the compressor. If the Pz does not match the maximum cooling power P of the vehicle air conditioner, that is, Pz is greater than P, the controller adjusts the required power P1 according to the maximum cooling power P of the air conditioner and the temperature of each battery, and adjusts the flow rate of the coolant flowing into each battery. The coolant flow distribution is scaled so that each battery can be cooled down with maximum efficiency.

When the number of batteries is a plurality of parallels, according to an embodiment of the present invention, the temperature adjustment method of the battery may further include the step of detecting the temperature of the plurality of parallel batteries. When at least one of the plurality of parallel batteries has a temperature greater than the first temperature threshold, the cooling mode is entered. When at least one of the plurality of parallel batteries has a temperature lower than a second temperature threshold, the heating mode is entered. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the temperature of each battery is instantly detected and judged. If the temperature of one of the batteries is higher than 40 °C, the temperature of the battery is too high. In order to avoid the influence of high temperature on the performance of the battery, the battery needs to be cooled, enters the cooling mode, and sends the battery cooling function. Start the information to the air conditioning system.

If the temperature of a battery is lower than 0 °C, the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, the battery needs to be warmed up, enters the heating mode, and controls the battery cooling branch. Turn off and control the heater to turn on to provide heating power to the battery.

In order to balance the temperatures of the first battery and the second battery, the following processing may be performed: For example, as shown in FIG. 9, when the battery includes the first battery and the second battery, in the battery cooling process, if The difference in battery temperature between the temperature T61 of the first battery and the temperature T62 of the second battery exceeds 3 ° C, and the temperature value is a preset value, that is, if T61-T62>3 ° C, the battery thermal management controller controls the first battery The opening of the regulating valve in the cooling branch is increased, and the opening degree of the regulating valve in the cooling branch of the second battery is controlled to decrease, so that the cooling power of the first battery is increased, and the cooling power of the second battery is reduced, thereby realizing the first battery. The temperature of the second battery is equalized.

And if T62-T61>3° C., the opening of the regulating valve in the second battery cooling branch is controlled to increase, and the opening degree of the regulating valve in the first battery cooling branch is controlled to decrease, so that the cooling power of the second battery is increased. The cooling power of the first battery is reduced, thereby achieving temperature equalization of the first battery and the second battery.

In the battery heating process, if the battery temperature difference between the first battery and the second battery exceeds 3 ° C, that is, if T61-T62 > 3 ° C, the battery thermal management controller controls the adjustment in the first battery cooling branch The valve opening degree is decreased, and the opening degree of the regulating valve in the second battery cooling branch is controlled to increase, so that the heating power of the first battery is increased, and the heating power of the second battery is decreased, thereby realizing the first battery and the second battery. The temperature is balanced. If T62-T61>3° C., the opening of the regulating valve in the second battery cooling branch is controlled to decrease, and the opening degree of the regulating valve in the first battery cooling branch is controlled to increase the heating power of the second battery. Increasing, the heating power of the first battery is reduced, thereby achieving temperature equalization of the first battery and the second battery.

According to an embodiment of the present invention, when the cooling mode is performed, the temperature of the battery connected in parallel according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the plurality of parallel batteries are respectively adjusted, specifically: determining each battery Whether the temperature adjustment required power P1 is greater than the temperature-adjusted actual power P2 corresponding to each battery. If the temperature adjustment required power P1 of a battery is greater than the temperature-adjusted actual power P2 corresponding to the battery, the power difference between the temperature adjustment required power P1 of the battery and the temperature adjustment actual power P2 is obtained, and is increased for cooling according to the power difference. The power of the battery's compressor, or adjust to increase the battery's coolant flow to increase the battery's cooling power. If the temperature adjustment demand power P1 of a battery is less than or equal to the temperature adjustment actual power P2 corresponding to the battery, reduce the power of the compressor or keep the power of the compressor unchanged, or adjust the cooling liquid flow of the battery to reduce the battery. Cooling power.

Specifically, when operating in the cooling mode, P1 and P2 of each battery are respectively acquired and judged. If the P1 of one of the batteries is greater than P2, it means that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and according to The power difference increases the power of the compressor 1 or increases the coolant flow rate of the battery to increase the cooling power of the battery. The greater the power difference between P1 and P2, the more the power of the compressor and the coolant flow rate of the battery increase. More so that the temperature of the battery is lowered to the target temperature within the preset time t. If P1 of one of the batteries is less than or equal to P2, the power of the compressor 1 can be kept constant or the power of the compressor can be appropriately reduced, or the coolant flow rate of the battery can be reduced, and the cooling power of the battery can be reduced. When the temperature of all the batteries is lower than 35 °C, the battery cooling is completed, the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the battery cooling branch is controlled to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery is higher than 35 ° C, the cooling power of the d battery is appropriately increased, so that the battery is cooled as soon as possible.

According to an embodiment of the present invention, when the heating mode is performed, the temperature of the plurality of batteries connected in parallel is adjusted according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the plurality of parallel batteries, respectively, including: determining each battery Whether the temperature adjustment required power P1 is greater than the temperature-adjusted actual power P2 corresponding to each battery. If the temperature adjustment required power P1 of a battery is greater than the temperature-adjusted actual power P2 corresponding to the battery, the power difference between the temperature adjustment required power P1 of the battery and the temperature adjustment actual power P2 is obtained, and is increased for cooling according to the power difference. The power of the battery heater, or the increase in the coolant flow rate of the battery to increase the heating power of the battery.

Specifically, when in the heating mode, P1 and P2 of each battery are respectively acquired and judged. If P1 of one of the batteries is greater than P2, it means that if the heating temperature of the battery cannot be completed within the target time t according to the current heating power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained. And increasing the power of the heater for heating the battery according to the power difference, or adjusting the coolant flow rate of the battery so that the battery can complete the temperature adjustment within the target time t. Among them, the greater the difference between P1 and P2, the more the power of the heater and the coolant flow of the battery circuit increase. If the P1 of a certain battery is less than or equal to P2, the power of the heater may be appropriately reduced, or the power of the heater may be kept constant, or the flow rate of the coolant of the battery circuit may be adjusted to reduce the heating power of the battery. When the temperature of all the batteries is higher than the preset temperature, for example, 10 ° C, the battery is heated, and the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the heater is turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery is lower than 10 ° C, then the power of the heater and the rotation speed of the pump are appropriately increased to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, the temperature adjustment method of the vehicle battery may further include: if the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, reducing the rotation speed of the pump; if the temperature of a certain battery When the required power P1 is adjusted to be greater than the corresponding temperature-adjusted actual power P2, the rotational speed of the pump is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if P1 of a certain battery is smaller than P2, the rotation speed of the control pump is lowered to save electric energy. If the P1 of a battery is greater than P2, in addition to controlling the power of the heater, the compressor, or the coolant flow of the circuit in which the battery is located, the speed of the pump can be controlled to increase the flow rate per unit time. The coolant quality of the cross section of the road, thereby increasing the temperature of the battery to adjust the actual power P2 to achieve temperature regulation within the target time t.

In order to make the present invention more clearly understood by those skilled in the art, a temperature adjustment method of an in-vehicle battery system will be described below in conjunction with a specific embodiment.

As shown in FIG. 9, the battery may include a first battery and a second battery, Pz=P11+P12, P11 is the temperature adjustment required power of the first battery, and P12 is the required power for the second battery temperature adjustment, and Pz is the first. The sum of the temperature adjustment required power of the battery and the second battery (total temperature adjustment required power Pz). Pf=P21+P22, P21 is the temperature adjustment actual power of the battery, P22 is the temperature adjustment actual power of the battery, and Pf is the sum of the temperature adjustment actual powers of the first battery and the second battery.

When the temperature of a battery is greater than the first temperature threshold (for example, 40 ° C), the temperature regulation system of the vehicle battery operates in the cooling mode, if the sum of the total battery cooling demand power Pz and the interior cooling demand power P4 is less than the maximum compressor The cooling power P, that is, Pz + P4 ≤ P, controls the compressor 1 to operate in accordance with the Pz + P4 cooling power. It can be understood that Pz<P, P4<P in this case.

If Pz+P4>P, it is judged whether the temperature of the first battery or the second battery is greater than 45 ° C. If it is greater than 45 ° C, the cooling power is preferentially provided for battery cooling, and the controller controls the compressor to operate according to the maximum cooling power P, the battery The cooling power of the cooling branch is Pz, and the cooling power of the cooling branch in the vehicle is equal to P-Pz.

If it is determined that the battery temperature is not more than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the vehicle, the compressor operates according to the maximum cooling power P, and the cooling power of the cooling branch in the vehicle is P4, and the battery is cooled. The cooling power of the branch is equal to P-P4. The first battery cooling branch and the second battery cooling branch scale down the cooling power. The ratio can be: (P-P4) / (P11 + P12). If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied.

The sum of the temperature-regulated actual powers of the first battery and the second battery is Pf, and when Pz>PF, the power to be adjusted is Pc (Pc=Pz-Pf). If Pz+P4+Pc≤P, the compressor needs to increase the cooling power to increase the opening degree of the second expansion valve and increase the rotation speed of the pump 51. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the cooling power of the second battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first electric power is kept constant, or the opening degree of the regulating valve of the circuit in which the first battery is located is controlled to decrease, so that the cooling power of the first battery is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the second battery is located is decreased, so that the cooling power of the second battery is reduced.

If Pz+P4+Pc>P (and Pz+Pc≤P), the following determination is made: It is judged whether the temperatures of the first battery and the second battery are greater than 45 °C. If it is greater than 45 ° C, the cooling power is preferentially provided for battery cooling, the compressor operates according to the maximum cooling power, and the rotation speed of the pump is increased, the cooling power of the battery cooling branch is increased by Pc, and the cooling power of the vehicle is reduced by Pc. If P11 ≥ P21, and P11 - P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the cooling power of the first battery is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the cooling power of the second battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery is kept constant, or the opening of the regulating valve that controls the circuit in which the first battery is located is reduced, so that the cooling power of the battery is reduced. If P12 < P22, and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is located is controlled to decrease, so that the cooling power of the second battery is reduced.

If the battery temperature is not more than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the vehicle. The compressor operates according to the maximum cooling power P, which increases the speed of the pump and the cooling power of the cooling branch in the vehicle. For P4, the cooling power of the battery cooling branch is equal to P-P4. The first battery 61 cooling branch and the second battery 62 cooling branch scale down the cooling power. The ratio can be: (P-P4) / (P11 + P12). The cooling power of the first battery is P11*(P-P4)/(P11+P12), and the cooling power of the second battery is P12*(P-P4)/(P11+P12).

If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied, the compressor operates at the maximum power P, the opening degree of the second expansion valve is increased, the rotation speed of the pump is increased, and the cooling power of the battery cooling branch circuit is increased. . At the same time, the following processing is performed: If P11 ≥ P21, and P11-P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the cooling power of the first battery is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the cooling power of the second battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery is kept constant, or the opening of the regulating valve that controls the circuit in which the first battery is located is reduced, so that the cooling power of the battery is reduced. If P12 < P22, and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is located is controlled to decrease, so that the cooling power of the second battery is reduced.

When Pz ≤ Pf, when the power to be adjusted is Pc (Pc=Pf-Pz), the compressor cooling power is maintained, or the cooling power of the compressor is reduced, or the opening of the second expansion valve is reduced, or reduced. The speed of the pump. If P11 ≥ P21, and P11 - P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the cooling power of the first battery is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery is located is increased, so that the cooling power of the battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening of the regulating valve of the circuit in which the first battery is located is controlled to decrease, so that the cooling power of the first battery is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the adjustment opening of the loop in which the second battery is controlled is decreased, so that the cooling power of the second battery is reduced.

When the temperature of the vehicle battery is less than the second temperature threshold (for example, 0 ° C), when the temperature adjustment system of the vehicle battery operates in the heating mode, if Pz>Pf, the power to be adjusted is Pc (Pc=Pz-Pf), heating The heating power of the device increases Pc and increases the speed of the pump. At the same time, the following processing is performed: If P11 ≥ P21, and P11-P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the heating power of the first battery is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the heating power of the second battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery is kept constant, or the opening of the regulating valve that controls the circuit in which the first battery is located is reduced, so that the heating power of the first battery is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is located is controlled to decrease, so that the heating power of the second battery is reduced.

If Pz ≤ Pf, and the power to be adjusted is Pc (Pc = Pz - Pf), the power of the heater remains unchanged, or the heating power Pc is reduced, or the pump rotation speed is lowered. At the same time, the following processing is performed: If P11 ≥ P21, and P11-P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the heating power of the first pool is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the heating power of the second battery is increased by Pc2. If P11 < P12 and P21 - P11 = Pc1, the heating power of the first battery is kept constant, or the opening of the regulating valve that controls the circuit in which the first battery is located is reduced, so that the heating power of the first battery is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is controlled is reduced, so that the heating power of the battery is reduced.

According to an embodiment of the present invention, a plurality of compressors for supplying a refrigerant to a battery may further include: adjusting a required power P1 and a maximum cooling power of each compressor according to a temperature of each battery Determine the number of compressors that are started. When in the cooling mode, the corresponding number of compressors are controlled to start.

Further, determining the number of compressors to be started according to the temperature adjustment required power P1 of each battery and the maximum cooling power P of each compressor specifically includes: adjusting the required power P1 according to the temperature of each battery to generate the total temperature adjustment actual power P _Z ; determining whether the total temperature adjustment demand power P _Z is greater than the maximum refrigeration power P of the single compressor; if greater than the maximum refrigeration power P of the single compressor, controlling the plurality of compressors to start simultaneously.

Specifically, when there are a plurality of compressors, correspondingly, the in-vehicle cooling branch and the battery cooling branch are plural. For example, when there are two compressors for supplying refrigerant to the battery, and two of the in-vehicle cooling branch and the battery cooling branch, respectively, when the temperature adjustment system enters the cooling mode, respectively, P1 of each battery is obtained, The total temperature adjustment required power P _Z of the entire temperature regulation system can be calculated by adding P1 of each battery. If P _{Z is} less than or equal to the maximum cooling power P of a single compressor, then control of a compressor is started. And if Pz is greater than the maximum cooling power P of a single compressor, then the two compressors are controlled to start working simultaneously to meet the cooling and cooling power requirements of the battery.

When the number of compressors for supplying refrigerant to the battery is plural, and the sum of the maximum cooling powers of the plurality of compressors is P5, the battery cooling power adjustment may be: (1) When Pz>Pf, the power to be adjusted is Pc (Pc = Pz - Pf), if Pz + P4 + Pc ≤ P5, the compressor needs to increase the cooling power to Pc, increase the opening of the second expansion valve, and increase the pump speed. At the same time, the following processing is performed: If P11 ≥ P21, and P11-P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the cooling power of the first battery is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the cooling power of the second battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery is kept constant, or the opening of the regulating valve that controls the circuit in which the first battery is located is reduced, so that the cooling power of the first battery is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is located is controlled to decrease, so that the cooling power of the battery is reduced.

If Pz+P4+Pc>P5 (and Pz+Pc≤P5), the following judgment is made: It is judged whether the battery temperature is greater than 45 °C. If it is greater than 45 ° C, the cooling power is preferentially provided for battery cooling, the compressor operates according to the maximum cooling power, and the rotation speed of the water pump is increased, the cooling power of the battery cooling branch is increased by Pc, and the power of the cooling branch of the vehicle is decreased by Pc.

If P11 ≥ P21, and P11-P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery is located is increased, so that the cooling power of the battery is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the cooling power of the second battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the battery is kept constant, or the opening of the regulating valve that controls the circuit in which the first battery is located is reduced, so that the cooling power of the first battery is reduced. If P12 < P22, and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is located is controlled to decrease, so that the cooling power of the second battery is reduced.

If the battery temperature is not more than 45 ° C, and the temperature inside the car has not reached the set temperature, the cooling power is preferentially provided for the vehicle. All the compressors are operated according to the maximum cooling power, and the water pump speed is increased, and the cooling power of the cooling branch in the vehicle is increased. For P4, the cooling power of the battery cooling branch = P5-P4. The first battery cooling branch and the second battery cooling branch scale down the cooling power. The ratio can be: (P5-P4) / (P11 + P12). The cooling power of the first battery 61 is P11*(P5-P4)/(P11+P12), and the cooling power of the second battery 62 is P12*(P5-P4)/(P11+P12).

If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied, all the compressors are operated at the maximum power, the opening degree of the second expansion valve is increased, and the water pump speed is increased, so that the cooling power of the battery cooling branch circuit is increased by Pc. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery is located is increased, so that the cooling power of the first battery is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the cooling power of the second battery is increased by Pc2. If P11 < P12 and P21 - P11 = Pc1, the cooling power of the first battery is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery is located is reduced, so that the cooling power of the first battery is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is located is controlled to decrease, so that the cooling power of the battery is reduced.

(2) When Pz ≤ Pf and the power to be adjusted is Pc (Pc = Pf - Pz), the compressor cooling power is maintained, or the cooling power of the compressor is reduced, or the opening of the second expansion valve is reduced. Or reduce the speed of the pump. If P11 ≥ P21, and P11 - P21 = Pc1, the opening of the regulating valve that controls the circuit in which the first battery is located is increased, so that the cooling power of the first battery is increased by Pc1. If P12 ≥ P22, and P12-P22 = Pc2, the opening of the regulating valve that controls the circuit in which the second battery is located is increased, so that the cooling power of the battery is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery is kept constant, or the opening of the regulating valve that controls the circuit in which the first battery is located is reduced, so that the cooling power of the first battery is reduced. If P12 < P22, and P22 - P12 = Pc2, the cooling power of the second battery is kept constant, or the opening of the regulating valve of the circuit in which the second battery is located is controlled to decrease, so that the cooling power of the second battery is reduced.

When the temperature of the vehicle battery is less than the second temperature threshold (for example, 0 ° C), when the temperature adjustment system of the vehicle battery operates in the heating mode, if Pz>Pf, the power to be adjusted is Pc (Pc=Pz-Pf), heating The heating power of the unit 53 is increased by Pc to increase the rotational speed of the pump 51. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the heating power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the heating power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the heating power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the heating power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the heating power of the second battery 62 is reduced.

If Pz ≤ Pf, and the power to be adjusted is Pc (Pc = Pz - Pf), the power of the heater remains unchanged, or the heating power Pc is reduced, or the pump rotation speed is lowered. At the same time, the following processing is performed: If P11 ≥ P21, and P11 - P21 = Pc1, the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is increased, so that the heating power of the first pool 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the opening degree of the regulating valve 58 that controls the circuit in which the second battery 62 is located is increased, so that the heating power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the regulating valve 58 that controls the circuit in which the first battery 61 is located is decreased, so that the heating power of the first battery 61 is reduced. If P12 < P22 and P22 - P12 = Pc2, the cooling power of the second battery 62 is kept constant, or the opening degree of the regulating valve 58 of the circuit in which the second battery 62 is controlled is decreased, so that the heating power of the battery 62 is reduced. According to the temperature adjustment method of the vehicle battery according to the embodiment of the present invention, first, respectively, the temperature adjustment required power of the plurality of parallel batteries is obtained, and then the temperature adjustment actual power of the plurality of parallel batteries is respectively obtained, and finally, according to the plurality of parallel batteries Temperature regulation requires power and temperature regulation The actual power regulates the temperature of a plurality of parallel batteries. Therefore, the method can accurately control the heating power and the cooling power of each battery according to the actual state of each battery, and adjust the temperature when the battery temperature is too high or too low, so that the temperature of the battery is maintained at a preset range. To avoid the situation where the performance of the vehicle battery is affected by temperature.

When the number of the vehicle batteries is plural, and the batteries are independently arranged, the present invention also proposes another temperature regulation system for the vehicle battery.

Specifically, as shown in FIG. 11A, the temperature adjustment system includes: a plurality of compressors 1, a plurality of condensers 2, a plurality of battery cooling branches 4, and a plurality of battery temperature adjustment modules 5.

The plurality of condensers 2 are connected to the plurality of compressors 1, the plurality of battery cooling branches 4 are connected between the plurality of compressors 1 and the plurality of condensers 2, and the plurality of battery cooling branches 4 are connected to each other. The battery temperature adjustment module 5 is respectively connected to the plurality of batteries 6 and the plurality of battery cooling branches 4 for respectively obtaining the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the plurality of batteries, and adjusting the required power P1 and the temperature adjustment according to the temperature. The power P2 adjusts the temperature of the battery, and adjusts the degree of cooling provided by the plurality of compressors 1 to the battery cooling branch 4 corresponding to the battery 6 based on the temperature adjustment required power P1 and the temperature adjustment actual power P2.

Further, according to an embodiment of the present invention, the temperature of the battery is adjusted according to the temperature adjustment required power and P1 and the temperature adjustment actual power P2, specifically including: adjusting the required power P1 according to the temperature and adjusting the actual power P2 according to the temperature at the target time t The temperature of the battery is adjusted to reach the target temperature.

That is to say, when the battery temperature adjustment module 5 performs temperature adjustment for each battery 6 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2, it can be ensured that the actual state of each battery 6 is accurately controlled within the target time t. The heating power and cooling power of the vehicle battery, so that the temperature is adjusted when the vehicle battery temperature is too high or too low.

As shown in FIG. 11A, taking the compressor 1, the battery cooling branch 4, and the battery temperature adjusting module 5 as six, the battery cooling branch 4 may include a first battery cooling branch 401 and a second battery. The cooling branches 402 correspond to the first battery 61 and the second battery 62, respectively.

When the coolant of the air conditioner is not connected to the battery temperature adjustment module 5, the battery cooling branch 4 has two pipes, the first pipe is connected to the compressor 1, and the second pipe is connected to the battery temperature adjustment module 5. Wherein the first pipe and the second pipe are disposed adjacent to each other independently. Taking the first battery cooling branch 401 where the first battery 61 is located as an example, when the temperature of the first battery 61 is too high, the vehicle air conditioning refrigeration function is turned on, the battery cooling function is activated, and the coolant in the first pipeline and the second pipeline ( The flow direction of the refrigerant, for example, is: compressor 1 - condenser 2 - first battery cooling branch 401 - compressor 1; first battery cooling branch 401 - battery temperature regulating module 5 - first battery 61 - battery The temperature adjustment module 5 - the first battery cooling branch 401.

It can be understood that each battery temperature adjustment module 5 can adjust the required power and P1 and the temperature adjustment actual power P2 according to the temperature of the corresponding battery, and adjust the cooling power of the battery by adjusting the flow rate of the coolant flowing into the corresponding battery cooling branch 4. / Heating power, thereby ensuring that the temperature of the battery is adjusted according to the actual state of each battery within the target time t. At the same time, since the plurality of battery cooling branches 4 are connected to each other, the battery temperature adjusting module 5 can ensure the cooling capacity of the battery cooling branch 4 corresponding to the battery according to the temperature of each battery, thereby ensuring the battery capacity. The temperature is balanced. Therefore, the temperature can be adjusted within the target time when the temperature of the vehicle battery is too high or too low, so that the temperature of the vehicle battery is maintained within a preset range, thereby avoiding the situation that the performance of the vehicle battery is affected by the temperature, and each can be guaranteed. The temperature between the batteries is balanced.

According to an embodiment of the present invention, as shown in FIG. 11A, the battery cooling branch 4 may include a heat exchanger 41 including a first pipe and a second pipe, and a second pipe and battery temperature adjustment module 5 Connected, the first pipe is in communication with the compressor 1, wherein the first pipe and the second pipe are disposed adjacent to each other independently.

The battery temperature adjustment module 5 may include a flow path (not specifically shown) for adjusting the temperature of the battery, and the flow path is disposed in the battery 6. A pump 51, a medium container 52, a heater 53, and a controller (not specifically shown) are connected between the flow path and the heat exchanger 41. The controller acquires the temperature adjustment required power P1 of the plurality of batteries 6 and the temperature adjustment actual power P2 of the battery, and adjusts the temperature of the battery 6 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 of each battery. The battery cooling branch 4 may also include a second expansion valve 42 and a second electronic valve 43.

As shown in FIG. 11, the first battery cooling branch 401 may further include a first regulating valve 411 and a third regulating valve 413; the second battery cooling branch 402 may further include a second regulating valve 412 and a fourth regulating valve 414, For details of the connection mode of each regulating valve, refer to FIG. 11A, and no further description is made here.

As shown in Fig. 11A, the compressor 11 controls the flow rate of the refrigerant flowing to the 401 branch and the 402 branch, respectively, through the first regulating valve 411 and the second regulating valve 412. The compressor 12 controls the flow rates of the refrigerants of the flow rate 401 branch and the 402 branch, respectively, through the third regulator 413 valve and the fourth regulator valve 414. The cooling power of the battery cooling branch 401 is related to the refrigerant flow rates of the first regulator valve 411 and the third regulator valve 413. The cooling power of the battery cooling branch 402 is related to the refrigerant flow rates of the second regulator valve 412 and the fourth regulator valve 414.

It can be understood that the battery cooling branch 4 may not be provided with the heat exchanger 41. When there is no heat exchanger 41, the refrigerant flowing in the battery cooling branch 4 is the refrigerant. If the heat exchanger 41 is provided, the refrigerant flows in the first pipe in the battery cooling branch 4, and the coolant flows in the second pipe.

According to an embodiment of the present invention, as shown in FIG. 11A, the battery temperature adjustment module 5 may further include a first temperature sensor 55 disposed at an inlet of the flow path, and a second temperature sense disposed at the outlet of the flow path. A detector 56, and a flow rate sensor 57. It will be appreciated that the inlet and outlet locations of the flow path are not absolute, but are determined based on the steering of the pump 51.

Specifically, the heat exchanger 41 may be a plate heat exchanger, and the plate heat exchanger may be installed inside the vehicle air conditioner, so that the entire refrigerant circuit is inside the vehicle air conditioner, facilitating the commissioning of the vehicle air conditioner, and the vehicle air conditioner can be separately supplied. And assembly, at the same time, the car air conditioner only needs to be refilled once in the installation procedure. The coolant flows into the inside of the battery 6 from the inlet of the flow path, and flows out from the outlet of the flow path, thereby achieving heat exchange between the battery 6 and the cooling liquid.

The pump 51 is mainly used to provide power. The medium container 52 is mainly used for storing the coolant and receiving the coolant added to the temperature regulation system. When the coolant in the temperature regulation system is reduced, the coolant in the medium container 52 can be automatically replenished. . The heater 53 can be a PTC heater, can perform CAN communication with the controller, and provides heating power for the temperature regulation system of the vehicle battery, and is controlled by the controller. Moreover, the heater 53 is not directly in contact with the battery 6, and has high safety, reliability, and practicality.

The first temperature sensor 55 is configured to detect the temperature of the coolant at the flow path inlet, and the second temperature sensor 56 is configured to detect the temperature of the coolant at the flow path outlet. The flow rate sensor 57 is used to detect the flow rate information of the coolant in the corresponding pipe. The second electronic valve 43 is used to control the opening and closing of the respective battery cooling branch 4, and the second expansion valve 42 can be used to control the flow of coolant in the responding battery cooling branch 4. The controller can adjust the temperature of the two batteries by adjusting the opening degrees of the first to fourth regulating valves 411-414 while controlling the coolant flow rates of the two cooling branch circuits of the first battery 61 and the second battery 62. At the same time, the controller can also perform CAN communication with the vehicle air conditioner and the heater 53, and can control the rotation speed of the pump 51 and monitor the temperature and flow information of the coolant, and can also manage the battery 6 to detect the voltage and temperature of the battery 6. Information to control the on/off of the temperature regulation system of the vehicle battery.

How each battery temperature adjustment module 5 obtains the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the corresponding battery 6 will be described below with reference to specific embodiments.

According to an embodiment of the present invention, the controller may be configured to separately acquire a first parameter when each battery is turned on, and generate a first temperature adjustment required power of each battery according to the first parameter, and acquire each battery separately. a second parameter at the time of temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter, and adjusting the required power according to the first temperature of each battery and the second temperature adjustment required power of each battery The temperature adjustment of each battery requires power P1.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery 6 is turned on, and a target time t from the initial temperature to the target temperature, and the controller acquires between the initial temperature and the target temperature. The first temperature difference ΔT ₁ , and the first temperature adjustment required power is generated according to the first temperature difference ΔT ₁ and the target time t.

Further, the controller generates the first temperature adjustment required power by the following formula (1): ΔT ₁ *C*M/t (1), where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery 6, and M is the quality of the battery 6.

The second parameter is the average current I of each battery 6 within a preset time, and the controller generates a second temperature adjustment required power by the following formula (2): I ² *R, (2), where I is the average current, R is the internal resistance of the battery 6.

When the battery 6 is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery 6 is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the invention, the controller generates the first of each battery according to the inlet temperature detected by the first temperature sensor 55 of the loop in which each battery 6 is located and the outlet temperature detected by the second temperature sensor 56. The temperature difference ΔT _{2 is two} , and the temperature-regulated actual power P2 of each battery is generated according to the second temperature difference ΔT _{2 of} each battery and the flow rate v detected by the flow rate sensor 57.

Further, according to an embodiment of the present invention, the actual power P2 is adjusted according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is in the flow path The specific heat capacity of the coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow path The cross-sectional area.

Specifically, after the vehicle is powered on, the controller determines whether the vehicle needs to perform temperature adjustment. If it is determined that the vehicle needs temperature adjustment, the temperature adjustment function is turned on, and the low speed information is sent to the pump 51, and the pump is driven to a default speed (such as a low speed). start working. Then, the controller acquires an initial temperature (ie, current temperature) of each battery 6, a target temperature, and a target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t can be preset according to actual conditions, and according to the formula (1) Calculate the first temperature adjustment required power of each battery. At the same time, the controller separately obtains the average current I of each battery 6 for a preset time, and calculates the second temperature adjustment required power of each battery according to formula (2). Then, the controller calculates the temperature adjustment required power P1 according to the first temperature adjustment required power and the second temperature adjustment required power of each battery 6 (that is, the required power of the battery 6 is adjusted to the target temperature within the target time). And the controller obtains the temperature information detected by the first temperature sensor 55 and the second temperature sensor 56 corresponding to each battery, and respectively obtains the flow rate information detected by the flow rate sensor 57, according to the formula (3) The temperature adjustment actual power P2 of each battery 6 is calculated separately. Finally, the controller can adjust the required power and P1 and the temperature adjustment actual power P2 according to the temperature of the corresponding battery, adjust the cooling power of the battery by adjusting the flow rate of the coolant flowing into the corresponding battery cooling branch 4, or by adjusting the heater. The heating power is adjusted so as to ensure that the temperature of the battery is adjusted according to the actual state of each battery within the target time t.

How to adjust the temperature of each battery 6 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 according to the temperature of each battery 6 will be described below with reference to specific embodiments.

According to an embodiment of the present invention, the controller may be configured to generate a total temperature adjustment required power Pz according to the temperature adjustment required power P1 of each battery, and generate a total maximum cooling power of the plurality of compressors according to the maximum cooling power P of the plurality of compressors. P5, and determining whether the total temperature adjustment demand power P _Z is greater than the total maximum cooling power P5 of the plurality of compressors, wherein when the total temperature adjustment required power P _{Z is} greater than the total maximum cooling power P5 of the plurality of compressors, the controller compresses the plurality The machine 1 adjusts the cooling capacity of the battery cooling branch 4 corresponding to the battery to the maximum; when the total temperature regulating required power Pz is less than or equal to the total maximum cooling power P5 of the plurality of compressors, the controller adjusts the required power Pz according to the total temperature. The difference in the degree of cooling of the battery cooling branch 4 corresponding to the battery 6 is adjusted by the difference from the total maximum cooling power P5.

Specifically, as shown in FIG. 11A, when the battery is cooled, the controller can calculate the total temperature adjustment required power Pz of the entire temperature adjustment system according to the temperature adjustment required power P1 of each battery, that is, the temperature of each battery. The total required temperature adjustment demand power Pz is obtained by adjusting the required power P1, and the controller calculates the total maximum cooling power P5 of the plurality of compressors according to the maximum cooling power P of each compressor 1, that is, the maximum of each compressor 1 The total cooling power P5 is obtained by adding the cooling power P. Then, the controller determines whether Pz>P5, and if so, the controller controls to adjust the opening degree of each of the second expansion valves 42 to the maximum to increase the flow rate of the coolant flowing into each of the batteries; The battery can be cooled down within the target time. And if Pz ≤ P5, the controller adjusts the opening degree of each of the second expansion valves 42 according to the difference between Pz and P5, wherein the larger the absolute value of the difference between Pz and P5, the second expansion valve 42 The smaller the opening, the purpose of saving energy.

According to an embodiment of the invention, the controller is further configured to: detect the temperature of the plurality of batteries, and control the temperature adjustment system to enter the cooling mode when the temperature of any of the plurality of batteries 6 is greater than the first temperature threshold And controlling the temperature adjustment system to enter the heating mode when the temperature of any of the plurality of batteries is less than the second temperature threshold. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the controller detects the temperature of each battery 6 and determines it. If the temperature of one of the batteries 6 is higher than 40 ° C, the temperature of the battery 6 is too high at this time, in order to avoid the influence of the high temperature on the performance of the battery 6, the battery 6 needs to be cooled, and the controller controls the temperature adjustment. The system enters a cooling mode and sends a battery cooling function activation information to the air conditioning system, and controls the corresponding second electronic valve 43 to open to exchange heat between the coolant and the battery 6 to lower the temperature of the battery 6.

If the temperature of a certain battery 6 is lower than 0 ° C, the temperature of the battery 6 is too low at this time, in order to avoid the influence of the low temperature on the performance of the battery 6, the battery 6 needs to be heated, and the controller controls the temperature adjustment. The system enters a heating mode, controls the second electronic valve 43 to close, and controls the corresponding heater 53 to open to provide heating power to the temperature regulating system. When the temperature adjustment system is operating in the heating mode, the heater 53 provides heating power to heat the first battery 61. The flow direction of the coolant in the circuit where the first battery 61 is located is: the medium container 52 - the heat exchanger 41 - heating 53 (open) - pump 51 - first temperature sensor 55 - first battery 61 - second temperature sensor 56 - flow sensor 57 - medium container 52, such loop, to achieve the first battery The temperature of 61 is raised.

According to an embodiment of the present invention, when the temperature adjustment required power P1 of a certain battery is greater than the temperature-adjusted actual power P2 of the battery, the controller acquires the temperature adjustment required power P1 of the battery and the actual temperature adjustment. The power difference between the powers P2, and the power of the compressor 1 for cooling the battery is increased according to the power difference, or the coolant flow rate of the battery cooling branch 4 corresponding to the battery 6 is increased to increase the cooling power of the battery, and When the temperature adjustment required power P1 of a battery is less than or equal to the temperature-adjusted actual power P2 corresponding to the battery, the power of the compressor is reduced or the power of the compressor is kept constant, or the battery cooling branch 4 corresponding to the battery 6 is adjusted to be reduced. Coolant flow to reduce battery cooling power.

Specifically, when operating in the cooling mode, the controller acquires P1 and P2 of each battery 6, respectively, and makes a judgment. If the P1 of one of the batteries 6 is greater than P2, it means that if the cooling of the battery 6 cannot be completed within the target time according to the current cooling power or the coolant flow rate, the controller acquires the power between the battery P1 and P2. Poor, and increase the power of the compressor 1 for cooling the battery according to the power difference, or increase the coolant flow rate of the battery cooling branch 4 where the battery is located to increase the cooling power of the battery, wherein the power of P1 and P2 The greater the difference, the more the power of the corresponding compressor 1 and the coolant flow rate of the battery increase, so that the temperature of the battery is lowered to the target temperature within a preset time t. And if P1 of one of the batteries 6 is less than or equal to P2, the power of the compressor 1 for cooling the battery may be kept constant or the power of the compressor 1 may be appropriately reduced, or the battery cooling branch where the battery is located may be reduced 4 The coolant flow reduces the cooling power of the battery. When the temperature of all the batteries 6 is lower than 35 ° C, the battery 6 is cooled, and the controller transmits information for turning off the temperature adjustment function to the vehicle air conditioner through the CAN communication, and controls all the second electronic valves 43 to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery 6 is still higher than 35 ° C, the controller appropriately increases the power of the corresponding compressor 1 or the rotation speed of the pump to make the battery Complete the cooling as soon as possible.

According to an embodiment of the present invention, when in the heating mode, the controller acquires the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery when the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2. The power difference between the two, and the power of the heater 53 for heating the battery is increased according to the power difference to increase the heating power of the battery, and when the temperature adjustment required power P1 of a certain battery is less than or equal to the temperature adjustment actual power P2, The power of the small heater 53 or the power of the heater 53 is kept constant.

Specifically, when in the heating mode, the controller acquires P1 and P2 of each battery 6, respectively, and makes a determination. If P1 of one of the batteries 6 is greater than P2, it means that if the heating of the battery 6 cannot be completed within the target time according to the current heating power or the coolant flow rate, the controller acquires the power between P1 and P2 of the battery. It is poor, and the power for heating the heater 53 of the battery 6 is increased in accordance with the power difference so that the battery can complete the temperature adjustment within the target time. Among them, the larger the difference between P1 and P2, the more the power of the heater 53 is increased. And if P1 of a certain battery is less than or equal to P2, the controller can appropriately reduce the power of the heater 53 to save power or keep the power of the heater 53 unchanged. When the temperature of all the batteries 6 is higher than a preset temperature, for example, 10 ° C, the heating of the battery 6 is completed, and the controller controls the heater 53 to be turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery 6 is still lower than 10 ° C, the controller further increases the power of the heater 53 to complete the temperature rise as soon as possible.

For example, as shown in FIG. 11A, since the heating functions of the first battery 61 and the second battery 62 are independent of each other, the first battery 61 and the second battery 62 are respectively heated by a heater, so only the first battery is used. 61 is an example to illustrate the power adjustment of the battery heating function. (Assume that P11 is the temperature adjustment required power of the first battery 61, P21 is the temperature adjustment actual power of the first battery 61, and the power difference between P11 and P21 is P31)

If P11>P21, the power to be adjusted is P31 (P31=P11-P21), the heating power of the heater 53 is increased by P31, and the rotation speed of the pump 51 is increased.

If P11 ≤ P21, and the power to be adjusted is P31 (P31 = P11 - P21), the power of the heater 53 remains unchanged, or the power of the heater 53 is decreased by P31, or the rotational speed of the pump 51 is lowered.

According to an embodiment of the present invention, the controller is further configured to reduce the rotation speed of the pump 51 when the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, and adjust the temperature requirement of a certain battery. When the power P1 is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump 51 is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if P1 of a certain battery 6 is smaller than P2, the controller controls the rotation speed of the corresponding pump 51 to be reduced to save electric energy. If the P1 of a certain battery 6 is greater than P2, the controller controls the power of the corresponding heater 53 or the compressor 1 to increase or the coolant flow rate of the circuit in which the battery is located to increase, and also controls the rotation speed of the pump 51 to increase. The quality of the coolant flowing through the cross section of the cooling flow path per unit time increases the temperature adjustment actual power P2 of the battery to achieve temperature regulation within the target time t.

According to an embodiment of the present invention, if there are a plurality of compressors 1 for supplying a refrigerant to a battery, the controller is further configured to adjust the required power P1 according to the temperature of each battery and the maximum cooling power P of each compressor. The number of compressors started, and when the temperature regulation system is in the cooling mode, controls the corresponding number of compressors 1 to start.

Further, the controller may generate the total temperature adjustment required power Pz according to the temperature adjustment required power P1 of each battery, and the controller controls the plurality of compressors 1 when determining that the total temperature adjustment required power Pz is greater than the maximum cooling power P of the single compressor Start at the same time.

Specifically, as shown in FIG. 11A, taking the compressor 1 as two as an example, when the temperature adjustment system enters the cooling mode, the controller acquires P1 of each battery 6, and the temperature-regulated actual power P2 of each battery, respectively. The maximum cooling power P of a single compressor, and the P1 of each battery is added to calculate the total temperature adjustment demand power Pz of the entire temperature regulation system, and the temperature adjustment actual power P2 of each battery is added to obtain the total temperature adjustment actual The power Pf, which adds the maximum cooling power of each compressor, calculates the sum P5 of the maximum cooling powers of all the compressors. The temperature adjustment required power of the first battery 61 is P11, and the temperature adjustment required power of the second battery 62 is P12. The temperature adjustment actual power of the first battery 61 is P21, and the temperature adjustment actual power of the second battery 62 is P22. The maximum cooling power P of each compressor is equal.

If Pz ≤ P, then only one compressor 1 needs to be controlled to provide cooling power, and two compressors 1 can also be controlled to work together. If P < Pz ≤ P5, two compressors 1 are required to work together, and the initial cooling power of each compressor is Pz/2. If Pz ≤ P5, the compressor 1 is controlled to operate according to the Pz cooling power, and by adjusting the opening degrees of the first to fourth regulating valves, the initial cooling power of the first battery cooling branch 401 is cooled according to the P11 cooling power, The initial cooling power of the two-cell cooling branch 402 is cooled according to the P21 cooling power. If Pz>P5, each compressor operates according to the maximum cooling power P, and the initial cooling power of the first battery cooling branch 401 can be cooled according to the P5*[P11/(P11+P12)] cooling power, the second battery The initial cooling power of the cooling branch 402 can be cooled according to the cooling power of P5*[P12/(P11+P12)].

According to an embodiment of the present invention, the controller is further configured to increase the cooling power of the battery 6 with a higher temperature when the temperature difference between the batteries 6 exceeds a set value in the cooling mode, so that the battery 6 is reduced. The difference in temperature between; when in the heating mode, when the temperature difference between the batteries exceeds the set value, the heating power of the battery 6 having a lower temperature is increased.

It can be understood that when the temperature adjustment system operates in the cooling mode, as shown in FIG. 11A, the controller can separately calculate the temperature adjustment required power P1 of the first battery 61 and the second battery 62, and then respectively according to the P1 of each battery. The opening degree of the corresponding second expansion valve 42 is adjusted with the maximum cooling power P of the compressor. In the cooling process, the controller continues to adjust the opening degree of the second expansion valve 42 according to the actual power P2 of each battery. At the same time, the controller adjusts the first battery cooling branch 401 and the second battery cooling branch by adjusting the opening degrees of the first to fourth regulating valves 411-414 according to the temperature condition between the first battery 61 and the second battery 62. The coolant flow rate of the path 402 is distributed so as to control the equalization of the temperatures of the first battery 61 and the second battery 62. Wherein, when the temperature of the first battery 61 is higher than the temperature of the second battery 62 and the difference exceeds the set value, the opening degrees of the first regulating valve 411 and the third regulating valve 413 may be increased, and the second regulating valve 412 and the second regulating valve 412 may be decreased. The opening degree of the fourth regulating valve 414 is to increase the cooling power of the first battery 61; when the temperatures of the first battery 61 and the second battery 62 are equal, if the cooling powers provided by the two compressors 1 are equal, controllable The opening degrees of the first to fourth regulating valves 411-414 are the same; and if the cooling powers provided by the two compressors 1 are not equal, the opening degrees of the first regulating valve 411 and the second regulating valve 412 can be controlled to be equal, and the control is The three regulating valves 413 and the fourth regulating valve 414 are equally open. When the temperature adjustment system operates in the heating mode, when the temperature of the first battery 61 is lower than the temperature of the second battery 62 and the difference exceeds the set value, the controller increases the heating of the heater 53 corresponding to the first battery 61. power. Thereby, the temperature balance between the two batteries can be maintained. According to an embodiment of the present invention, the temperature adjustment system of the vehicle battery can also be shown in FIGS. 11B and 11C. Wherein, FIG. 11B shows that the plurality of compressors (ie, the first compressor 11 and the second compressor 12 in FIG. 11B) are connected in parallel and share an expansion valve, and each of the battery cooling branches increases the regulating valve (ie, the first regulating valve). 411 and the second regulating valve 412) adjust the flow rate of the coolant flowing into each of the battery cooling branches through the regulating valve to adjust the cooling power of each battery. 11C is a parallel compressor (ie, the first compressor 11 and the second compressor 12 in FIG. 11C) are connected in parallel and share a condenser 2, and each of the battery cooling branches is provided with a second expansion valve 42 and The electronic valve adjusts the flow rate of the coolant flowing into each of the battery cooling branches by adjusting the opening degree of the second expansion valve 42 to adjust the cooling power of each battery, and controls the opening and closing of each of the battery cooling branches through the electronic valve.

The temperature adjustment procedure of the system shown in Fig. 11C will be described below in conjunction with a specific embodiment.

As shown in FIG. 11C, the battery may include a first battery and a second battery, Pz=P11+P12, P11 is the temperature adjustment required power of the first battery, and P12 is the required power for the second battery temperature adjustment, and Pz is the first. The sum of the temperature adjustment required power of the battery and the second battery (total temperature adjustment required power Pz). Pf=P21+P22, P21 is the temperature adjustment actual power of the battery, P22 is the temperature adjustment actual power of the battery, and Pf is the sum of the temperature adjustment actual powers of the first battery and the second battery. P is the maximum cooling power of the compressor, and P5 is the sum of the maximum cooling power of all the compressors, P5=2*P.

Initial distribution of compressor power: If Pz ≤ P, only one compressor is needed to provide cooling power, or two compressors work together; if P < Pz ≤ P5, two compressors are required to work together, each The initial cooling power of the compressor is Pz/2; if Pz>P5, two compressors are required to work together, and each compressor operates at the maximum cooling power P.

When Pz ≤ P5, the compressor operates according to the Pz cooling power, the initial cooling power of the first battery 61 cooling branch is cooled according to the P11 cooling power, and the second battery 62 cooling branch initial cooling power is cooled according to the P21 cooling power. When Pz>P5, each compressor operates at the maximum cooling power P. The initial cooling power of the cooling branch of the first battery 61 is cooled according to the cooling power of P5*[P11/(P11+P12)]; the initial cooling power of the cooling branch of the second battery 62 is cooled according to P5*[P12/(P11+P12)] The power is cooled.

In the process of cooling the battery, the cooling power of the battery needs to be adjusted as follows: When Pz>Pf, the power to be adjusted is Pc (Pc=Pz-Pf). If Pz + Pc ≤ P5, the compressor needs to increase the cooling power to be Pc. At the same time, the following processing is performed: If P11 ≥ P21, and P11-P21 = Pc1, the opening degree of the expansion valve that controls the circuit in which the first battery 61 is located is increased, and the rotation speed of the pump of the control circuit is increased, so that the first battery 61 is The cooling power is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the expansion valve opening degree of the circuit in which the second battery 62 is controlled is increased, and the rotation speed of the pump of the control circuit is increased, so that the cooling power of the second battery 62 is increased by Pc2. If P11 < P12, and P21 - P11 = Pc1, the cooling power of the first battery 61 is kept constant, or the opening degree of the expansion valve 8 of the circuit in which the first battery 61 is controlled is decreased, and the rotation speed of the pump of the circuit in which the circuit is controlled is lowered. The cooling power of the first battery 61 is reduced. If P12<P22, and P22-P12=Pc2, the cooling power of the second battery 62 is kept unchanged, or the opening degree of the expansion valve of the circuit in which the second battery 62 is controlled is decreased, and the rotation speed of the pump of the control circuit is lowered. The cooling power of the second battery 62 is reduced.

P5 If Pz +Pc>P5, each compressor operates according to the maximum cooling power P, increasing the water pump speed. At the same time, the following processing is performed: controlling the opening degree of the expansion valve of the cooling branch where the first battery 61 is located, so that the cooling power of the cooling branch of the first battery 61 is cooled according to the cooling power of P5*[P11/(P11+P12)]; The expansion valve opening of the cooling branch where the battery 62 is located causes the cooling power of the cooling branch of the second battery 62 to be cooled according to the cooling power of P5*[P12/(P11+P12)].

When Pz ≤ Pf, when the power to be adjusted is Pc (Pc = Pf - Pz), the compressor cooling power is maintained, or the cooling power of the compressor is lowered, and the following processing is performed. If P11 ≥ P21, and P11 - P21 = Pc1, the expansion valve opening degree of the circuit in which the first battery 61 is controlled is increased, and the rotation speed of the pump of the control circuit is increased, so that the cooling power of the first battery 61 is increased by Pc1. If P12 ≥ P22, and P12 - P22 = Pc2, the expansion valve opening of the circuit in which the second battery 62 is controlled is increased, and the rotation speed of the pump of the circuit in which it is controlled is increased, so that the cooling power of the battery 62 is increased by Pc2. If P11<P12 and P21-P11=Pc1, the cooling power of the first battery 61 is kept unchanged, or the opening degree of the expansion valve of the circuit in which the first battery 61 is controlled is decreased, and the rotation speed of the pump of the control circuit is lowered. The cooling power of the first battery 61 is reduced. If P12<P22, and P22-P12=Pc2, the cooling power of the second battery 62 is kept unchanged, or the opening degree of the expansion valve of the circuit in which the second battery 62 is controlled is decreased, and the rotation speed of the pump of the control circuit is lowered. The cooling power of the second battery 62 is reduced.

Heating power adjustment: Since the heating functions of the first battery 61 and the second battery 62 are independent of each other, the first battery 61 and the second battery 62 respectively perform heating demand power of the first battery 61 with a heater, and P21 is the second battery 61. The actual heating power, the power difference is P31) If P11>P21, the power to be adjusted is P31 (P31=P11-P21), the heating power of the heater is increased by P31, and the speed of the pump is increased. If P11 ≤ P21, the power to be adjusted is P31 (P31 = P11 - P21), the power of the heater remains unchanged, or the heating power P31 is reduced, or the speed of the pump is reduced.

Battery temperature equalization: In the battery cooling process, if the battery temperature difference between the temperature T61 of the first battery 61 and the temperature T62 of the second battery 62 exceeds 3 ° C, the temperature value is a preset value, that is, if T61-T62 >3 ° C, the battery thermal management controller controls the opening degree of the second expansion valve 42 in the cooling branch of the first battery 61 to increase, or simultaneously controls the rotation speed of the pump in the branch where the first battery 61 is located, and controls the second The opening degree of the second expansion valve 42 in the cooling branch of the battery 62 is decreased, or at the same time, the rotation speed of the pump in the branch in which the second battery 62 is located is controlled to decrease, so that the cooling power of the first battery 61 is increased, and the second battery 62 is The cooling power is reduced, thereby achieving temperature equalization of the first battery 61 and the second battery 62.

And if T62-T61>3°C, the battery thermal management controller controls the second expansion valve 42 in the cooling branch of the second battery 62 to increase the opening degree, or simultaneously controls the rotation speed of the pump in the branch where the second battery 62 is located. Controlling the decrease in the opening degree of the second expansion valve 42 in the cooling branch of the first battery 61, or simultaneously controlling the decrease in the rotational speed of the pump in the branch in which the first battery 61 is located, so as to increase the cooling power of the second battery 62, The cooling power of one battery 61 is reduced, thereby achieving temperature equalization of the first battery 61 and the second battery 62.

In the battery heating process, if the battery temperature difference between the first battery 61 and the second battery 62 exceeds 3 ° C, that is, if T61-T62 > 3 ° C, the battery thermal management controller controls the heating of the first battery 61. The heating power of the heater 53 in the circuit is reduced, and the rotation speed of the pump 51 of the circuit is lowered, and the heating power of the heater 53 in the heating circuit of the second battery 62 is controlled to increase, and the rotation speed of the circuit is increased to make The heating power of the first battery 61 is increased, and the heating power of the second battery 62 is decreased, thereby achieving temperature equalization of the first battery 61 and the second battery 62. If T62-T61>3°C, the battery thermal management controller controls the heating power of the heater 53 in the heating circuit in which the first battery 61 is located to increase, and increases the rotation speed of the pump 51 of the circuit, and controls the heating circuit of the second battery 62. The heating power of the heater 53 is reduced, and the loop pump speed is lowered to reduce the heating power of the first battery 61, and the heating power of the second battery 62 is increased, thereby realizing the first battery 61 and the second battery. The temperature of 62 is balanced.

It can be understood that the difference between FIG. 11B and FIG. 11C is that FIG. 11B is between the first battery cooling branch 401 where the first battery 61 is located and the second battery cooling branch 402 where the second battery 62 is located. The cooling power is regulated by the regulating valve; the two battery cooling branches of Fig. 11C are adjusted by the expansion valve to achieve the cooling power of the two cooling branches. For the specific adjustment procedure of FIG. 11B, reference may be made to the above embodiments, and details are not described herein again.

The temperature adjustment system according to the embodiment of the present invention can accurately control the heating power and the cooling power of each battery according to the actual state of each battery, and adjust the temperature when the battery temperature is too high or too low to maintain the temperature of the battery. In the preset range, the situation that the performance of the vehicle battery is affected by the temperature is avoided, and since the plurality of battery cooling branches are connected to each other, the battery temperature adjustment module can be adjusted by adjusting the cooling capacity of the battery cooling branch corresponding to each battery. Degree, to ensure the temperature balance between the individual batteries.

Fig. 12a is a flow chart showing a temperature adjustment method of a vehicle battery according to a sixth embodiment of the present invention. The vehicle battery temperature regulation system includes a plurality of compressors and a plurality of battery cooling branches corresponding to the plurality of compressors, a plurality of batteries, and a plurality of battery temperature adjustment modules connected between the plurality of batteries and the plurality of battery cooling branches. As shown in Fig. 12a, the temperature adjustment method of the vehicle battery includes the following steps:

S1'', respectively, the temperature adjustment required power P1 of the plurality of batteries is obtained.

Further, according to an embodiment of the present invention, as shown in FIG. 12b, respectively obtaining the temperature adjustment required power P1 of the plurality of batteries specifically includes: S11'', respectively acquiring the first parameter when the opening temperature of each battery is adjusted, And generating a first temperature adjustment required power of each battery according to the first parameter.

S12'', respectively obtaining a second parameter of each battery during temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter.

S13'', the temperature adjustment required power P1 of each battery is respectively generated according to the first temperature adjustment required power of each battery and the second temperature adjustment required power of each battery.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the first parameter is generated according to the first parameter. A temperature adjustment required power specifically includes: obtaining a first temperature difference ΔT ₁ between the initial temperature and the target temperature. The first temperature adjustment required power is generated based on the first temperature difference ΔT ₁ and the target time t.

Further, according to an embodiment of the present invention, the first temperature adjustment required power is generated by the following formula (1): ΔT ₁ *C*M/t, (1) where ΔT ₁ is between the initial temperature and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is the average current I of each battery for a preset time, and the second temperature adjustment required power of each battery is generated by the following formula (2): I ² *R, (2 Where I is the average current and R is the internal resistance of the battery.

Wherein, when the battery is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery is heated, P1 = ΔT ₁ * C * M / tI ² * R.

S2'', respectively, obtains the temperature-regulated actual power P2 of the plurality of batteries.

According to an embodiment of the present invention, as shown in FIG. 12b, respectively acquiring the temperature-regulated actual power P2 of the plurality of batteries specifically includes: S21'', obtaining an inlet temperature and an outlet temperature of a flow path for adjusting the temperature of each battery, And obtain the flow rate v of the coolant flowing into the flow path.

S22'', a second temperature difference ΔT ₂ is generated according to the inlet temperature and the outlet temperature of the flow path of each battery.

S23'', the temperature-regulated actual power P2 of each battery is generated according to the second temperature difference ΔT ₂ and the flow rate v of each battery.

Further, according to an embodiment of the present invention, the temperature-adjusted actual power P2 is generated according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is the flow path The specific heat capacity of the medium coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow The area of the road.

S3'', the corresponding battery temperature adjustment module of each battery is controlled to adjust the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2. Wherein, the plurality of battery cooling branches communicate with each other, and the cooling capacity opening degree provided by the plurality of compressors to the battery cooling branch corresponding to the battery is adjusted according to the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2.

In the embodiment of the present invention, the corresponding battery temperature adjustment module of each battery is controlled according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 to adjust the temperature of the battery, specifically: adjusting the required power according to the temperature. P1 and the temperature-regulated actual power P2 control the corresponding battery temperature adjustment module of each battery during the target time t to adjust the temperature of the battery to reach the target temperature.

Adjusting the required power P1 and the temperature adjusting actual power P2 according to the temperature of the battery to adjust the cooling capacity provided by the plurality of compressors to the battery cooling branch corresponding to the battery, specifically comprising: determining whether the temperature adjustment required power P1 of each battery is greater than the battery The temperature adjusts the actual power P2; if the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery, the cooling power of the plurality of compressors or the single compressor is increased, or the cooling provided to the battery cooling branch corresponding to the battery is increased. The amount of opening.

Specifically, after the vehicle is powered on, it is determined whether the battery needs to be temperature-regulated, and if it is determined, the initial temperature (ie, the current temperature) of each battery, the target temperature, and the target time t from the initial temperature to the target temperature are respectively acquired, wherein the target The temperature and the target time t can be preset according to actual conditions, and the first temperature adjustment required power is calculated according to formula (1). At the same time, the average current I of each battery in a preset time is respectively obtained, and the second temperature adjustment required power of each battery is separately calculated according to formula (2). Then, according to the first temperature adjustment required power and the second temperature adjustment required power of each battery, respectively, the temperature adjustment required power P1 of each battery (that is, the required power of the battery is adjusted to the target temperature) is calculated. And, respectively, the inlet temperature and the outlet temperature of each battery are obtained, and the flow velocity information is obtained, and the actual temperature adjustment power P2 of each battery is calculated according to formula (3). Then, the required power and P1 and the temperature adjustment actual power P2 can be adjusted according to the temperature of the corresponding battery, and the cooling power/heating power of the battery can be adjusted by adjusting the flow rate of the coolant flowing into the corresponding battery cooling branch or the corresponding heater power. Thereby, it is possible to ensure that the temperature of the battery is adjusted in accordance with the actual state of each battery within the target time t. At the same time, since the plurality of battery cooling branches are connected to each other, the temperature of each battery can be balanced by adjusting the cooling capacity of the battery cooling branch corresponding to the battery according to the temperature of each battery. Therefore, the temperature can be adjusted within the target time when the temperature of the vehicle battery is too high or too low, so that the temperature of the vehicle battery is maintained within a preset range, thereby avoiding the situation that the performance of the vehicle battery is affected by the temperature.

How to control the corresponding battery temperature adjustment module of each battery to adjust the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 will be described below with reference to specific embodiments.

According to one embodiment of the present invention, as shown in FIG. 12b of the temperature adjusting method of vehicle battery may further include: S31 '', the required power adjustment of the temperature of each cell P1 produce a total power demand temperature regulator P _Z.

S32'', the total maximum cooling power P5 of the plurality of compressors is generated based on the maximum cooling power P of the plurality of compressors.

S33'', it is judged whether the total temperature adjustment required power P _Z is greater than the total maximum cooling power P5 of the plurality of compressors.

S34'', if the total temperature adjustment required power P _{Z is} greater than the total maximum cooling power P5 of the plurality of compressors, the cooling capacity of the plurality of compressors to the battery cooling branch corresponding to the battery is adjusted to the maximum.

S35'', if the total temperature adjustment required power P _{Z is} less than or equal to the total maximum cooling power P5 of the plurality of compressors, the difference between the required power P _Z and the total maximum cooling power P5 is adjusted according to the total temperature to the battery cooling branch corresponding to the battery The cooling capacity is adjusted.

Specifically, the total temperature adjustment required power P _Z of the entire temperature adjustment system can be calculated according to the temperature adjustment required power P1 of each battery, that is, the temperature adjustment required power P1 of each battery is added to obtain the total temperature adjustment required power P. _Z. At the same time, the total maximum cooling power P5 of the plurality of compressors is calculated according to the maximum cooling power P of each compressor, that is, the maximum cooling power P of each compressor is added to obtain the total maximum cooling power P5. Then, it is judged whether P _Z >P5, and if so, the control adjusts the opening degree of each of the second expansion valves to the maximum to adjust the coolant flow rate of the plurality of compressors to the battery cooling branch corresponding to the battery to the maximum The battery can be cooled down within the target time t. And if P _Z ≤ P5, the opening degree of the second expansion valve is adjusted according to the difference between P _Z and P5, wherein the larger the absolute value of the difference between P _Z and P5 is, the opening degree of the second expansion valve The smaller, the goal of saving energy.

According to an embodiment of the present invention, as shown in FIG. 13, the temperature adjustment method of the battery may further include the steps of: detecting a temperature of the battery, and determining whether the temperature is greater than a first temperature threshold or less than a second temperature threshold ( S10''-S20''). When the temperature of the battery is greater than the first temperature threshold, the cooling mode is entered (S30''). The first preset temperature threshold may be preset according to actual conditions, for example, may be 40 ° C. When the temperature of the battery is less than or equal to the first temperature threshold, further determining whether the temperature of the battery is less than the second temperature threshold, and entering the heating mode when the temperature of the battery is less than the second temperature threshold (S40''-S50'' ). The second preset temperature threshold may be preset according to actual conditions, for example, may be 0 ° C.

Specifically, after the vehicle is powered on, the temperature of each battery is instantly detected and judged. If the temperature of one of the batteries is higher than 40 °C, the temperature of the battery is too high. In order to avoid the influence of high temperature on the performance of the battery, the battery needs to be cooled, enters the cooling mode, and sends the battery cooling function. Start the information to the air conditioning system. If the temperature of a battery is lower than 0 °C, the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, the battery needs to be warmed up, enters the heating mode, and controls the corresponding battery cooling. The branch is closed and the heater is turned on to provide heating power to the battery.

According to an embodiment of the present invention, as shown in FIG. 13, when in the cooling mode, the corresponding battery temperature adjustment module of each battery is controlled according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 to the battery The temperature is adjusted, including:

S36'', it is judged whether the temperature adjustment required power P1 of each battery is larger than the temperature adjustment actual power P2 corresponding to each battery.

S37'', if the temperature adjustment required power P1 of a battery is greater than the temperature-adjusted actual power P2 of the battery, the power difference between the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2 is obtained, and according to the power difference The power of the compressor for cooling the battery is increased, or the coolant flow rate of the battery cooling branch corresponding to the battery is increased to increase the cooling power of the battery.

S38'', if the temperature adjustment demand power P1 of a battery is less than or equal to the temperature adjustment actual power P2 corresponding to the battery, reduce the power of the compressor or keep the power of the compressor unchanged, or adjust the battery cooling corresponding to the battery. The coolant flow of the branch to reduce the cooling power of the battery.

Specifically, when operating in the cooling mode, P1 and P2 of each battery are respectively acquired and judged. If the P1 of one of the batteries is greater than P2, it means that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and according to The power difference is increased by the power of the compressor for cooling the battery, or the coolant flow rate of the battery cooling branch where the battery is located to increase the cooling power of the battery, wherein the power difference between P1 and P2 is larger, correspondingly The more the power of the compressor and the coolant flow rate of the battery are increased, so that the temperature of the battery is lowered to the target temperature within a preset time t. And if P1 of one of the batteries is less than or equal to P2, the power of the compressor for cooling the battery can be kept constant or the power of the compressor can be appropriately reduced, or the coolant flow rate of the battery cooling branch where the battery is located can be reduced. , reduce the cooling power of the battery. When the temperature of all the batteries is lower than 35 °C, the battery cooling is completed, the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the second electronic valve is controlled to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery is still higher than 35 ° C, then the power of the corresponding compressor is appropriately increased, so that the battery is cooled as soon as possible.

According to an embodiment of the present invention, as shown in FIG. 13, when in the heating mode, the corresponding battery temperature adjustment module of each battery is controlled according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 to the battery The temperature is adjusted, specifically including: S39'', determining whether the temperature adjustment requirement P1 power of each battery is greater than the temperature adjustment actual power P2 corresponding to each battery.

S310'', if the temperature adjustment required power P1 of a battery is greater than the temperature-adjusted actual power P2 of the battery, the power difference between the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2 is obtained, and according to the power difference Increase the power of the heater to increase the heating power of the battery.

S311'', if the temperature adjustment required power P1 of a certain battery is less than or equal to the temperature-adjusted actual power P2 corresponding to the battery, the power of the heater is reduced, or the power of the heater is kept constant.

Specifically, when in the heating mode, P1 and P2 of each battery are respectively acquired and judged. If the P1 of one of the batteries is greater than P2, it means that if the heating temperature of the battery cannot be completed within the target time according to the current heating power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and according to The power difference increases the power of the heater used to heat the battery so that the battery can complete temperature regulation within the target time. If the P1 of a battery is less than or equal to P2, the power of the heater can be appropriately reduced to save power or keep the power of the heater unchanged. When the temperature of all the batteries is higher than the preset temperature, for example, 10 ° C, the battery is heated, and the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the heater is turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery is lower than 10 ° C, the power of the heater is appropriately increased to complete the temperature rise as soon as possible.

For example, as shown in FIG. 11A, since the heating functions of the first battery and the second battery are independent of each other, the first battery and the second battery are respectively heated by a heater, so the battery is only illustrated by taking the first battery as an example. Power regulation of the heating function. (Assume that P11 is the temperature regulation required power of the first battery, P21 is the temperature regulation actual power of the first battery, and the power difference between P11 and P21 is P31)

If P11>P21, the power to be adjusted is P31 (P31=P11-P21), the heating power of the heater is increased by P31, and the rotation speed of the pump is increased.

If P11 ≤ P21, the power to be adjusted is P31 (P31 = P11 - P21), the power of the heater remains unchanged, or the power of the heater is reduced by P31, or the speed of the pump is lowered.

According to an embodiment of the present invention, the temperature adjustment method of the vehicle battery may further include: if the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, reducing the rotation speed of the pump; if the temperature of a certain battery When the required power P1 is adjusted to be greater than the corresponding temperature-adjusted actual power P2, the rotational speed of the pump is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if P1 of a certain battery is smaller than P2, the rotation speed of the control pump is lowered to save electric energy. If the P1 of a battery is greater than P2, in addition to controlling the power of the heater, the compressor, or the coolant flow of the circuit in which the battery is located, the speed of the pump can be controlled to increase the flow rate per unit time. The coolant quality of the cross section of the road, thereby increasing the temperature of the battery to adjust the actual power P2 to achieve temperature regulation within the target time t.

According to an embodiment of the present invention, a plurality of compressors for supplying a refrigerant to a battery may further include: adjusting a required power P1 and a maximum cooling power of each compressor according to a temperature of each battery Determine the number of compressors that are started. When in the cooling mode, the corresponding number of compressors are controlled to start.

Further, determining the number of compressors to be started according to the temperature adjustment demand power P1 of each battery and the maximum cooling power P of each compressor specifically includes: adjusting the required power P1 according to the temperature of each battery to generate the total temperature adjustment actual power Pz Whether the total temperature regulation demand power Pz is greater than the maximum refrigeration power P of the single compressor; if it is greater than the maximum refrigeration power P of the single compressor, the control plurality of compressors are simultaneously started.

Specifically, when the temperature adjustment system enters the cooling mode, P1 of each battery is separately acquired, and P1 of each battery is added to calculate the total temperature adjustment required power P _Z of the entire temperature adjustment system. If Pz is greater than the maximum cooling power of a single compressor, then control the plurality of compressors to start the work at the same time, and adjust the flow rate of the coolant flowing into each of the battery cooling branches by adjusting the opening degree of the corresponding regulating valve to meet the corresponding cooling of the battery. Cooling power requirements.

Specifically, as shown in FIG. 11A, taking the compressor 1 as two as an example, when the temperature adjustment system enters the cooling mode, the controller separately acquires P1 of each battery, temperature-adjusted actual power P2 of each battery, and a single The maximum cooling power P of the compressor, and the P1 of each battery is added to calculate the total temperature adjustment demand power P _Z of the entire temperature regulation system, and the temperature adjustment actual power P2 of each battery is added to obtain the total temperature adjustment actual The power Pf, which adds the maximum cooling power of each compressor, calculates the sum P5 of the maximum cooling powers of all the compressors. Wherein, the temperature adjustment required power of the first battery is P11, and the temperature adjustment required power of the second battery is P12. The temperature adjustment actual power of the first battery is P21, and the temperature adjustment actual power of the second battery is P22. The maximum cooling power P of each compressor is equal.

If Pz ≤ P, then only one compressor needs to be controlled to provide cooling power, and two compressors can also be controlled to work together. If P < Pz ≤ P5, two compressors are required to work together, and the initial cooling power of each compressor is Pz/2. If Pz ≤ P5, the compressor is controlled to operate according to the Pz cooling power, and by adjusting the opening degrees of the first to fourth regulating valves, the initial cooling power of the first battery cooling branch is cooled according to the P11 cooling power, and the second battery The cooling branch initial cooling power is cooled according to the P21 cooling power. If Pz>P5, each compressor operates according to the maximum cooling power P, and the initial cooling power of the first battery cooling branch can be cooled according to P5*[P11/(P11+P12)] cooling power, and the second battery is cooled. The initial cooling power of the branch can be cooled according to the cooling power of P5 * [P12 / (P11 + P12)].

According to an embodiment of the present invention, when in the cooling mode, when the temperature difference between the batteries exceeds a set value, the cooling power of the higher temperature battery is increased to reduce the temperature difference between the batteries; In the mode, when the temperature difference between the batteries exceeds the set value, the heating power of the battery having a lower temperature is increased.

It can be understood that, when in the cooling mode, the temperature adjustment required power P1 of the first battery and the second battery can be separately calculated, and then the corresponding second is adjusted according to the P1 of each battery and the maximum cooling power P of the corresponding compressor, respectively. The opening of the expansion valve. And the opening degree of the second expansion valve 42 is continuously adjusted according to the actual power P2 of each battery. At the same time, according to the temperature condition between the first battery and the second battery, the coolant flow distribution of the first battery cooling branch and the second battery cooling branch is adjusted by adjusting the opening degrees of the first to fourth regulating valves, thereby A balance is achieved to control the temperature of the first battery and the second battery. Wherein, when the temperature of the first battery is higher than the temperature of the second battery and the difference exceeds the set value, the opening degrees of the first regulating valve and the third regulating valve may be increased, and the second regulating valve and the fourth regulating valve are decreased The opening degree is to increase the cooling power of the first battery; when the temperatures of the first battery and the second battery are equal, the opening degrees of the first to fourth regulating valves may be controlled to be the same. In the heating mode, when the temperature of the first battery is lower than the temperature of the second battery and the difference exceeds the set value, the heating power of the heater corresponding to the first battery is increased. Thereby, the temperature balance between the two batteries can be maintained.

According to the temperature adjustment method of the vehicle battery according to the embodiment of the present invention, the heating power and the cooling power of each battery can be precisely controlled according to the actual state of each battery, and the temperature is adjusted when the battery temperature is too high or too low. The temperature of the battery is maintained within a preset range, and the temperature balance between the individual batteries can be ensured.

The temperature regulation of the vehicle includes temperature regulation of the battery and temperature regulation within the cabin. In order to meet the demand in the case where the temperature of the battery satisfies the requirements, it is necessary to properly distribute the coolant flow rate of the battery cooling branch and the in-vehicle cooling branch. To this end, embodiments of the present invention provide a temperature adjustment system for a vehicle. The temperature adjustment method and temperature adjustment system of the vehicle proposed by the embodiment of the present invention will be described below with reference to the accompanying drawings.

2 is a block schematic diagram of a temperature adjustment system of a vehicle in accordance with one embodiment of the present invention. As shown in FIG. 2, the temperature adjustment system includes a compressor 1, a condenser 2, an in-vehicle cooling branch 3, a battery cooling branch 4, and a battery temperature adjustment module 5.

Among them, the condenser 2 is connected to the compressor 1, the in-vehicle cooling branch 3 is connected between the compressor 1 and the condenser 2, and the battery cooling branch 4 is connected between the compressor 1 and the condenser 2. The battery temperature adjustment module 5 is connected to the battery cooling branch 4 for acquiring the temperature adjustment demand power P1 and the temperature adjustment actual power P2 of the battery 6, and acquiring the vehicle interior temperature T and the air conditioning set temperature Ts, and adjusting according to the temperature. The required power P1, the temperature-adjusted actual power P2, the in-vehicle temperature T, and the air-conditioning set temperature Ts adjust the opening degrees of the in-vehicle cooling branch 3 and the battery cooling branch 4.

Specifically, the battery temperature adjustment module 5 acquires the temperature adjustment demand power P1 of the battery 6, the temperature adjustment actual power P2 of the battery 6, the interior temperature T of the vehicle, and the air conditioning set temperature Ts, and adjusts according to P1, P2, T, and Ts. The opening of the in-vehicle cooling branch 3 and the battery cooling branch 4 to distribute the cooling capacity. As shown in FIG. 1 , when the vehicle air conditioning refrigeration function is turned on, the flow direction of the coolant is: compressor 1 - condenser 2 - interior cooling branch 3 - compressor 1. The battery cooling branch 4 has two pipes, the first pipe is connected to the compressor 1, and the second pipe is connected to the battery temperature regulating module 5, wherein the first pipe and the second pipe are disposed adjacent to each other independently. When the battery temperature is too high, the battery cooling function is started, and the flow directions of the coolant in the first pipe and the second pipe are: compressor 1 - condenser 2 - battery cooling branch 4 - compressor 1; battery cooling branch 4—Battery temperature adjustment module 5—Battery 6—Battery temperature adjustment module 5—Battery cooling branch 4. When the temperature of the battery 6 is too low, the battery temperature adjusting module 5 starts the battery heating function, and the flow direction of the cooling liquid in the second pipe is: the battery cooling branch 4 - the battery temperature adjusting module 5 - the battery 6 - the battery temperature Adjustment module 5 - battery cooling branch 4.

It can be understood that the cooling power of the battery temperature regulating module 5 is provided by the vehicle air conditioner, and the cooling capacity is shared with the in-vehicle refrigeration system, thereby reducing the volume of the temperature regulating system and making the distribution of the coolant flow more flexible. Therefore, the system adjusts the opening degree of the in-vehicle cooling branch and the battery cooling branch, and can quickly adjust the temperature when the vehicle battery temperature is too high or too low, so that the temperature of the vehicle battery is maintained at the pre-charge. Set the range to avoid the situation that the performance of the vehicle battery is affected by the temperature, and also make the temperature inside the vehicle meet the demand if the temperature of the battery meets the requirements.

According to an embodiment of the present invention, the battery temperature adjustment module 5 is specifically configured to: cool the required cooling power 3 and the battery according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the interior temperature T, and the air conditioning set temperature Ts. The opening of the branch 4 is adjusted so that the battery 6 reaches the target temperature within the target time t.

Specifically, when the battery temperature adjustment module 5 adjusts the opening degrees of the in-vehicle cooling branch 3 and the battery cooling branch 4 according to P1, P2, T, and Ts, it can be ensured according to the actual condition of the battery 6 within the target time t. The state accurately controls the heating power and cooling power of the vehicle battery, thereby adjusting the temperature when the vehicle battery temperature is too high or too low, and satisfies the demand when the temperature of the battery meets the requirements.

Further, according to an embodiment of the present invention, as shown in FIG. 3, the battery cooling branch 4 includes a heat exchanger 41 including a first pipe and a second pipe, and a second pipe and a battery temperature regulating mode The group 5 is connected, and the first pipe is connected to the compressor 1, wherein the first pipe and the second pipe are disposed adjacent to each other independently. The battery temperature adjustment module 5 includes a flow path (not specifically shown) for adjusting the temperature of the battery, and the flow path is disposed in the battery 6. A pump 51, a medium container 52, a heater 53, and a controller (not specifically shown) are connected between the flow path and the heat exchanger 41. The controller obtains the temperature adjustment demand power P1 of the battery 6 and the temperature adjustment actual power P2 of the battery, and adjusts the temperature of the battery 6 according to the temperature adjustment required power P1 and the temperature adjustment actual power P2, and the controller adjusts the demand according to the temperature. The power P1, the temperature-adjusted actual power P2, the in-vehicle temperature T, and the air-conditioning set temperature Ts adjust the opening degrees of the in-vehicle cooling branch 3 and the battery cooling branch 4, so that the vehicle can be made if the temperature of the battery satisfies the requirements. The internal temperature meets the demand. The in-vehicle cooling branch 3 may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33. The battery cooling branch 4 may also include a second expansion valve 42 and a second electronic valve 43.

How to obtain the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery 6 can refer to the above embodiment, and to avoid redundancy, no further details are provided herein.

The following describes how the battery temperature adjustment module 5 adjusts the opening degrees of the in-vehicle cooling branch 3 and the battery cooling branch 4 according to P1, P2, T and Ts in combination with specific embodiments, so that the temperature of the battery satisfies the requirements. Next, make the interior temperature meet the demand.

According to an embodiment of the present invention, when in the cooling mode, the controller may reduce the in-vehicle cooling branch 4 when the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2 and the battery temperature is greater than the third temperature threshold T3. The opening degree is increased and the opening degree of the battery cooling branch 4 is increased. The third temperature threshold is greater than the first temperature threshold. For example, the third predetermined threshold may be 45 °C.

Specifically, after the vehicle is powered on, if the temperature of the battery 6 is higher than 40 ° C, the controller controls the temperature adjustment system to enter a cooling mode to cool the battery 6. In the process of cooling the battery 6, the controller acquires P1 and P2, and when it is judged that the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, it is further determined whether the battery temperature is greater than 45 °C. If the battery temperature is greater than 45 ° C, the battery temperature is too high, the vehicle air conditioner preferentially meets the cooling requirement of the battery 6, and the controller controls to reduce the opening degree of the first expansion valve 32 and increase the opening degree of the second expansion valve 42 to reduce the vehicle. The coolant flow rate of the internal cooling branch 3 increases the coolant flow rate of the battery cooling branch 4 to cause the battery 6 to complete the cooling as soon as possible. When the battery temperature is lowered to 35 ° C, the battery 6 is cooled and the controller controls the battery cooling branch 4 to be turned off. Thereby, it is possible to make the interior temperature satisfy the demand when the battery temperature satisfies the requirement.

According to an embodiment of the present invention, the controller may further be configured to increase the opening degree of the in-vehicle cooling branch 4 and reduce the temperature when the battery temperature is less than the third temperature threshold and the in-vehicle temperature T is greater than the air conditioning set temperature Ts. The opening of the battery cooling branch 3.

Specifically, in the program for cooling the battery 6, the controller further determines whether the interior temperature T is greater than the air-conditioning set temperature Ts when determining that the battery temperature is less than 45 °C. If T>Ts, it means that the temperature T in the vehicle does not reach the set temperature, and the temperature inside the vehicle is high. In order to prevent the user from feeling uncomfortable, the in-vehicle refrigeration demand is preferentially satisfied, and the controller increases the opening degree of the first expansion valve 32, The opening degree of the small second expansion valve 42. If the in-vehicle temperature T reaches the air-conditioning set temperature Ts, the in-vehicle cooling power is sufficient and reaches equilibrium, the controller increases the opening degree of the second expansion valve 42 to increase the cooling power of the battery 6. When the battery temperature is lowered to 35 ° C, the battery 6 is cooled, and the controller controls the second electronic valve 33 to be closed. Thereby, it is possible to make the interior temperature satisfy the demand when the battery temperature satisfies the requirement.

That is to say, the battery temperature is processed hierarchically here, and the critical values of the temperature control are 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery 6 is cooled. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature does not exceed 45 ° C, the cooling demand in the vehicle is still prioritized, and if the cooling power in the vehicle is sufficient and reaches equilibrium, the controller increases. The battery cools the opening of the branch 4 to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

According to an embodiment of the present invention, when in the heating mode, the controller obtains a power difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2 when the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, and according to The power difference increases the power for heating the heater 53 of the battery 6, and keeps the power of the heater 53 constant when the temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2.

Specifically, the vehicle may include a single battery 6, or may be composed of a plurality of batteries 6 connected in series, in parallel, or in a mixture. As shown in FIGS. 14A to 14B, taking two batteries as an example, when two batteries (first battery 61 and second battery 62) are connected in series, the pump corresponds to two, and two One pump is for the forward pump 511 and one for the reverse pump 522.

As shown in Fig. 14A, when the forward pump 511 is started, the flow direction of the coolant in the second pipe is: the medium container 52 - the heat exchanger 41 - the heater 53 - the forward pump 511 - the first temperature sense The detector 55 - the first battery 61 - the second battery 62 - the second temperature sensor 56 - the flow rate sensor 57 - the medium container 52. As shown in FIG. 14B, when the reverse pump 522 is activated, the flow direction of the coolant in the second pipe is: the medium container 52 - the flow rate sensor 57 - the second temperature sensor 56 - the second battery 62 - The first battery 61 - the first temperature sensor 55 - the reverse pump 512 - the heater 53 - the heat exchanger 41 - the medium container 52.

For example, when the cooling function of the first battery 61 and the second battery 62 is turned on, when the temperature adjustment system enters the cooling mode, the controller acquires P1 of each battery, temperature adjustment actual power P2 of each battery, and a single compressor, respectively. The maximum cooling power P, and the P1 of each battery is added, the total temperature adjustment demand power P _Z of the entire temperature adjustment system can be calculated, and the temperature adjustment actual power P2 of each battery is added to obtain the total temperature adjustment actual power Pf. Wherein, the temperature adjustment required power of the first battery is P11, and the temperature adjustment required power of the second battery is P12. The temperature adjustment actual power of the first battery is P21, and the temperature adjustment actual power of the second battery is P22. The maximum cooling power P of the compressor.

If the sum of the total temperature adjustment required power P _Z and the in-vehicle cooling demand power P4 is less than or equal to the maximum cooling power P of the compressor, that is, Pz + P4 ≤ P, the compressor operates at a cooling power of P _Z + P4. And Pz < P, P4 < P.

If Pz+P4>P, it is judged whether the temperature of the first battery 61 or the second battery 62 is greater than 45° C., if it is greater than 45° C., the cooling power is preferentially provided for battery cooling, and the controller controls the compressor 1 according to the maximum cooling power P. In operation, the cooling power of the battery cooling branch 4 is Pz, and the cooling power of the in-vehicle cooling branch 3 is equal to P-Pz.

If it is determined that the battery temperature is not greater than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the interior of the vehicle, the compressor 1 is operated according to the maximum cooling power P, and the cooling power of the cooling branch of the vehicle is P4, the battery The cooling power of the cooling branch is equal to P-P4.

If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied. The cooling power of the battery cooling branch is Pz.

The sum of the temperature-regulated actual powers of the first battery 61 and the second battery 62 is Pf, and when Pz>Pf, the power to be adjusted is Pc (Pc=Pz-Pf). If Pz + P4 + Pc ≤ P, the compressor needs to increase the cooling power to Pc, increase the opening degree of the second expansion valve 42, and increase the rotation speed of the pump 51. At the same time, the following processing is performed: If P11-P21=Pc1, P12-P22=Pc2, P11>P21, P12>P22: When Pc1 is greater than the set value, the control forward pump 511 is turned on, and the reverse pump 512 is turned off, so that the first The cooling power of one battery 61 is increased. When Pc2 is greater than the set value, the control reverse pump 512 is turned on, and the forward pump 511 is turned off, so that the cooling power of the second battery 62 is increased. When Pc1>Pc2, the control forward pump 511 is turned on, and the reverse pump 512 is turned off, so that the cooling power of the first battery 61 is increased. When Pc1 ≤ Pc2, the control reverse pump 512 is turned on, and the forward pump 511 is turned off, so that the cooling power of the second battery 62 is increased.

Also, when the temperature T61 of the first battery 61 is greater than the temperature T62 of the second battery 62, the control forward pump 511 is turned on, and the reverse pump 512 is turned off, so that the cooling power of the first battery 61 is increased. When the temperature T61 of the first battery 61 is less than or equal to the temperature T62 of the second battery 62, the control reverse pump 512 is turned on, and the forward pump 511 is turned off, so that the cooling power of the battery 62 is increased.

If P21-P11=Pc1, P22-P12=Pc2, P11≤P21, P12≤P22, it can be processed as follows: When Pc1 is greater than the set value, the control forward pump 511 is turned off, and the reverse pump 512 is turned on, so that The cooling power of the first battery 61 is reduced. When Pc2 is greater than the set value, the control reverse pump 512 is turned off, and the forward pump 511 is turned on, so that the cooling power of the second battery 62 is reduced. When Pc1>Pc2, the control forward pump 511 is turned off, and the reverse pump 512 is turned on, so that the cooling power of the first battery 61 is reduced. When Pc1 ≤ Pc2, the control reverse pump 512 is turned off, and the forward pump 511 is turned on, so that the cooling power of the second battery 62 is reduced.

Also, when the temperature T61 of the first battery 61 is greater than the temperature T62 of the second battery 62, the control forward pump 511 is turned on, and the reverse pump 512 is turned off, so that the cooling power of the first battery 61 is increased. When the temperature T61 of the first battery 61 is less than or equal to the temperature T62 of the second battery 62, the control reverse pump 512 is turned on, and the forward pump 511 is turned off, so that the cooling power of the battery 62 is increased. In addition, when the cooling function of the first battery 61 and the second battery 62 is activated, if the temperature of the first battery 61 is higher than the temperature of the second battery 62, and the difference exceeds a preset value, the controller controls The forward pump 511 operates to allow the coolant to flow through the first battery 61 and then through the second battery 62, thereby causing the first battery 61 to complete the cooling as soon as possible. And if the temperature of the second battery 62 is higher than the temperature of the first battery 61, and the difference exceeds a preset value, the controller controls the reverse pump 512 to operate, so that the coolant first flows through the second battery 62, and then flows. The first battery 61 is passed, so that the second battery 62 is cooled as soon as possible. Thereby, the temperature difference between the first battery 61 and the second battery 62 can be reduced by changing the flow direction of the cooling liquid.

When neither the cooling function nor the heating function of the first battery 61 and the second battery 62 is activated, if the temperature difference between the first battery 61 and the second battery 62 exceeds a preset value, the controller may control the forward pump 511. Or the reverse pump 512 is activated to cause the coolant in the battery cooling branch 4 to flow, thereby equalizing the temperatures of the first battery 61 and the second battery 62.

When the pump 51 is rotating forward and the maximum value of the temperature difference between the respective batteries obtained by the battery management controller exceeds a preset value, the battery management controller sends a message for controlling the pump reversal to the battery thermal management controller to The battery thermal manager controls the pump reverse (the flow direction of the loop is counterclockwise) so that the temperature of each series battery is less than the difference.

In summary, the temperature adjustment system of the vehicle according to the embodiment of the present invention acquires the temperature adjustment required power and the temperature adjustment actual power of the battery through the battery temperature adjustment module, and acquires the interior temperature of the vehicle and the set temperature of the air conditioner, and according to The temperature adjustment demand power, the temperature adjustment actual power, the interior temperature and the air conditioning set temperature adjust the opening degree of the interior cooling branch and the battery cooling branch. Therefore, the system adjusts the opening degree of the in-vehicle cooling branch and the battery cooling branch, and can quickly adjust the temperature when the vehicle battery temperature is too high or too low, so that the temperature of the vehicle battery is maintained at the pre-charge. Set the range to avoid the situation that the performance of the vehicle battery is affected by the temperature, and also make the temperature inside the vehicle meet the demand if the battery temperature meets the requirements.

Figure 15 is a flow chart showing a temperature adjustment method of a vehicle according to a first embodiment of the present invention. As shown in Fig. 15, the temperature adjustment method of the vehicle includes the following steps: S1', obtaining the temperature adjustment required power P1 of the battery and the temperature adjustment actual power P2.

Further, as shown in FIG. 16 , in the embodiment of the present invention, acquiring the temperature adjustment required power P1 of the battery specifically includes: S11′, acquiring the first parameter when the battery is turned on, and generating the first parameter according to the first parameter. A temperature adjustment requires power.

S12', obtaining a second parameter of the battery during temperature adjustment, and generating a second temperature adjustment required power according to the second parameter.

S13', the temperature adjustment required power P1 is generated according to the first temperature adjustment required power and the second temperature adjustment required power.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the first temperature adjustment requirement is generated according to the first parameter. The power specifically includes: acquiring a first temperature difference ΔT ₁ between the initial temperature and the target temperature; generating the first temperature adjustment required power according to the first temperature difference ΔT ₁ and the target time t.

Further, according to an embodiment of the present invention, the first temperature adjustment required power is generated by the following formula (1): ΔT ₁ *C*M/t, (1) where ΔT ₁ is between the initial temperature and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is the average current I of the battery for a preset time, and the second temperature adjustment required power is generated by the following formula (2): I ² *R, (2) where I is the average Current, R is the internal resistance of the battery.

When the battery is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the present invention, as shown in FIG. 16, acquiring the temperature-regulated actual power P2 of the battery specifically includes: S14', obtaining an inlet temperature and an outlet temperature of a flow path for adjusting the temperature of the battery, and obtaining a coolant inflow The flow rate of the flow path v.

S15', generating a second temperature difference ΔT ₂ according to the inlet temperature and the outlet temperature.

S16', the temperature adjustment actual power P2 is generated according to the second temperature difference ΔT ₂ and the flow velocity v.

Further, according to an embodiment of the present invention, the temperature-adjusted actual power P2 is generated according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is the flow path The specific heat capacity of the medium coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow The cross-sectional area of the road.

S2', the in-vehicle temperature T of the vehicle and the air-conditioning set temperature Ts are acquired.

S3' adjusts the opening degree of the in-vehicle cooling branch and the battery cooling branch according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the interior temperature T, and the air conditioning set temperature Ts.

Further, according to an embodiment of the present invention, the opening degree of the in-vehicle cooling branch and the battery cooling branch is adjusted according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the interior temperature T, and the air conditioning set temperature Ts, The method includes: adjusting the opening degree of the interior cooling branch and the battery cooling branch according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the interior temperature T, and the air conditioning set temperature Ts, so that the battery reaches the target time t Target temperature.

Specifically, after the vehicle is powered on, it is determined whether the vehicle needs to perform temperature adjustment, and if necessary, the initial temperature of the battery (ie, the current temperature), the target temperature, and the target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t are obtained. It can be preset according to the actual situation, and the first temperature adjustment required power is calculated according to formula (1). At the same time, the average current I of the battery in the preset time is obtained, and the second temperature adjustment required power is calculated according to the formula (2). Then, the temperature adjustment required power P1 (that is, the required power of the battery is adjusted to the target temperature) is calculated based on the first temperature adjustment required power and the second temperature adjustment required power. And, the inlet temperature and the outlet temperature of the battery are obtained, and the flow velocity information is acquired, and the actual temperature adjustment power P2 is calculated according to the formula (3). And obtain the interior temperature T and the air conditioner set temperature Ts. Finally, the opening degrees of the in-vehicle cooling branch and the battery cooling branch are adjusted according to P1, P2, T and Ts, so that the battery reaches the target temperature within the target time t. Therefore, the method adjusts the opening degree of the in-vehicle cooling branch and the battery cooling branch, and can quickly adjust the temperature when the vehicle battery temperature is too high or too low, so that the temperature of the vehicle battery is maintained at the pre-heat Set the range to avoid the situation that the performance of the vehicle battery is affected by the temperature, and also make the temperature inside the vehicle meet the demand if the temperature of the battery meets the requirements.

According to an embodiment of the present invention, as shown in FIG. 17, the temperature adjustment method of the vehicle may further include: detecting a temperature of the battery, and determining whether the temperature is greater than a first temperature threshold or less than a second temperature threshold ( S10'-S20'). When the temperature of the battery is greater than the first temperature threshold, the cooling mode is entered (S30'). The first preset temperature threshold may be preset according to actual conditions, for example, may be 40 ° C. When the temperature of the battery is less than or equal to the first temperature threshold, it is further determined whether the temperature of the battery is less than the second temperature threshold, and when the temperature of the battery is less than the second temperature threshold, the heating mode is entered (S40'-S50'). The second preset temperature threshold may be preset according to actual conditions, for example, may be 0 ° C.

Specifically, after the vehicle is powered on, the temperature of the battery is instantly detected and judged. If the temperature of the battery is higher than 40 °C, it means that the temperature of the battery is too high. In order to avoid the impact of high temperature on the performance of the battery, it is necessary to cool down the battery, enter the cooling mode, and control the start of the compressor to make the coolant and the battery. Perform heat exchange to lower the temperature of the battery. If the temperature of the battery is lower than 0 °C, it means that the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, it is necessary to heat up the battery, enter the heating mode, and control the heater to open to provide heating power.

It can be understood that, according to the temperature adjustment demand power P1 of the battery, the temperature adjustment actual power P2, the interior temperature T and the air conditioning set temperature Ts are adjusted by adjusting the opening degree of the interior cooling branch and the battery cooling branch, and the battery can be adjusted. While meeting the temperature requirements, the interior temperature meets the demand. Also, the temperature adjustment required power P1 and the temperature adjustment actual power P2 are easily acquired.

Specifically, it can be seen from the above embodiment that P1 is composed of two parts, taking a cooling battery as an example. When the battery needs to be cooled, the initial temperature of the battery is 45 ° C, and the target temperature of the battery cooling is 35 ° C, the battery is lowered from 45 ° C to The heat that needs to be dissipated at 35 ° C is fixed and can be directly calculated by the formula (1), ΔT ₁ *C*M/t. Where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery. At the same time, in the cooling process, there is a discharge and charging procedure. This program generates heat. This part of the heat can also be directly obtained by detecting the current. The current battery is directly calculated by the formula (3), ie, I ² *R. The heating power, that is, the second temperature adjustment required power. Where I is the average current and R is the internal resistance of the battery. One of the key points of the present invention is that the cooling time is adjustable, and the cooling completion time can be accurately determined. The present invention is set based on the target time t (t can be changed according to user requirements or actual vehicle design conditions). After determining the target time t required for the completion of the cooling, it is possible to estimate the temperature adjustment required power P1 required for the current battery cooling, P1 = ΔT ₁ * C * M / t + I ² * R. If the heating function is activated, the temperature adjustment demand power P1=ΔT ₁ *C*M/tI ² *R, that is, in the heating process of the battery, the larger the battery discharge or the charging current, the required heating power, that is, the temperature adjustment The smaller the required power P1 is.

Since the discharge of the battery or the charging current is varied, I ² *R is varied, so in order to better ensure the accuracy of the cooling time, the cooling power also varies with the current average discharge of the battery or the charging current. And change. If the car air conditioner cools the battery and the car at the same time, when the discharge current of the battery is small, the I ² *R will decrease, and at this time, the car air conditioner can allocate more cooling power to the car, so that the car is faster. The set temperature is reached. At the same time, when the battery discharge or charging current is large, I ² * R will be larger, and the vehicle air conditioner can allocate more cooling power to the battery. Through such adjustment, the time required for cooling the battery is always accurate, and at the same time, the cooling power of the vehicle air conditioner can be utilized more efficiently, without having to configure an air conditioner with a large cooling power, resulting in waste of cooling power.

Since the cooling time of the battery is affected by the cooling efficiency, since the cooling efficiency is affected by the external ambient temperature and the current temperature of the battery, the efficiency of the temperature regulating system is constantly changing in the battery cooling process, so the cooling efficiency cannot be 100%. Therefore, it is only necessary to detect the cooling time of the battery according to P1, and it is necessary to detect the temperature of the battery to adjust the actual power P2. In the present invention, the temperature-adjusted actual power P2 of the battery can be calculated by the formula (3), that is, ΔT2*c*m. P2 can also be calculated by the actual cooling power P2 of the battery. It can also be calculated by the formula (4), ΔT3*C*m1, where ΔT3 is the temperature change of the battery in a certain period of time, C is the specific heat capacity of the battery, and m1 is the battery. quality. However, due to the high quality of the battery, the temperature change is not obvious per unit time, and it takes a long time to detect the temperature difference, which does not meet the immediacy requirement, so the P2 power is generally calculated according to formula (3).

Due to the cooling efficiency, P2 is difficult to be completely equal to P1. In order to make the battery cooling target time t more accurate, it needs to be adjusted according to the power difference between P1 and P2 to ensure the temperature adjustment of the battery and the power of the battery. Adjust the actual power P2 to be equal. How to adjust the opening degree of the in-vehicle cooling branch and the battery cooling branch according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the interior temperature T, and the air-conditioning set temperature Ts will be described below with reference to specific embodiments. The temperature of the vehicle is adjusted.

According to an embodiment of the present invention, as shown in FIG. 18, when in the cooling mode, the demand power P1, the temperature adjustment actual power P2, the interior temperature T, and the air conditioning set temperature Ts are adjusted according to the temperature to the in-vehicle cooling branch and The adjustment of the opening degree of the battery cooling branch specifically includes: S31', when the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, it is determined whether the battery temperature T is greater than the third temperature threshold. Wherein, the third temperature threshold is greater than the first temperature threshold, for example, the third temperature threshold may be 45 °C.

S32', if the battery temperature T is greater than the third temperature threshold, the opening degree of the cooling branch in the vehicle is lowered, and the opening degree of the battery cooling branch is increased.

Specifically, after the vehicle is powered on, if the temperature of the battery is higher than 40 ° C, the temperature control system is controlled to enter a cooling mode to cool the battery. In the battery cooling program, P1 and P2 are obtained, and when it is judged that the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, it is further determined whether the battery temperature is greater than 45 °C. If the battery temperature is greater than 45 °C, the battery temperature is too high, the car air conditioner preferentially meets the cooling demand of the battery 6, the control reduces the opening degree of the cooling branch in the vehicle, and increases the opening degree of the battery cooling branch to reduce the cooling branch in the vehicle. The coolant flow of the road increases the coolant flow of the battery cooling branch to allow the battery to cool down as quickly as possible. When the battery temperature drops to 35 ° C, the battery cooling is completed and the control battery cooling branch is turned off. Thereby, the temperature inside the vehicle can be made to satisfy the demand if the temperature of the battery satisfies the requirement.

According to an embodiment of the present invention, as shown in FIG. 18, the temperature adjustment method of the vehicle may further include: S33', if the battery temperature is less than the third temperature threshold, further determining whether the interior temperature T is greater than the air conditioner setting Temperature Ts.

S34', if the in-vehicle temperature T is greater than the air-conditioning set temperature Ts, the opening degree of the in-vehicle cooling branch is increased, and the opening degree of the battery cooling branch is lowered.

Specifically, in the battery cooling program, when it is determined that the battery temperature is less than 45 ° C, it is further determined whether the interior temperature T is greater than the air-conditioning set temperature Ts. If T>Ts, it means that the temperature T in the car does not reach the set temperature, and the temperature inside the car is high. In order to prevent the user from feeling uncomfortable, the cooling demand in the car is preferentially satisfied, the opening degree of the cooling branch in the car is increased, and the battery is reduced. The opening of the cooling branch. If the temperature T of the vehicle reaches the set temperature Ts of the air conditioner and the cooling power in the vehicle is sufficient and reaches equilibrium, the opening degree of the cooling branch of the battery is increased to increase the cooling power of the battery. When the battery temperature drops to 35 ° C, the battery cooling is completed and the control battery cooling branch is turned off. Thereby, it is possible to make the interior temperature satisfy the demand when the battery temperature satisfies the requirement.

That is to say, the battery temperature is processed hierarchically here, and the critical values of the temperature control are 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery cooling is completed. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature is less than 45 ° C, the in-vehicle refrigeration demand is first satisfied, and if the in-vehicle refrigeration power is sufficient and reaches equilibrium, the battery cooling branch is increased. Opening degree to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

According to an embodiment of the present invention, as shown in FIG. 18, when in the heating mode, adjusting the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2 specifically includes: S35', determining the power required for temperature adjustment Whether P1 is greater than the temperature adjustment actual power P2.

S36', if the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, the power difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2 is obtained, and the power of the heater for heating the battery is increased according to the power difference.

S37', if the temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2, the power of the heater is kept constant.

Specifically, when entering the heating mode, the heater is turned on, and the power of the heater is adjusted according to P1 and P2. If P1 is greater than P2, it means that if the heater is heated at the current power, the temperature of the battery cannot be raised to the target temperature within the target time t. Therefore, the power difference between P1 and P2 is continuously obtained, and the power of the heater is increased according to the power difference, wherein the larger the difference between P1 and P2, the more the power of the heater is increased. And if P1 is less than or equal to P2, the power of the heater can be kept constant. When the temperature of the battery is higher than the preset temperature, for example, 10 ° C, the battery is heated, and the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the heater is turned off. If the temperature of the battery is still below 10 ° C after entering the heating mode for a long time, for example, after 1 hour, the power of the heater is appropriately increased to allow the battery to complete the temperature rise as soon as possible. Thereby, the temperature adjustment power can be precisely controlled according to the actual state of the battery, and the battery can be temperature-regulated within the target time.

According to an embodiment of the present invention, the temperature adjustment method of the vehicle may further include: if the temperature adjustment required power P1 is smaller than the temperature adjustment actual power P2, reducing the rotation speed of the pump. If the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, the rotation speed of the pump is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if P1 is less than P2, the rotation speed of the control pump is lowered to save power. If P1 is greater than P2, the control can control the increase of the power of the heater or control the increase of the opening degree of the battery cooling branch, and also control the increase of the rotation speed of the pump, and can increase the coolant flowing through the cross section of the cooling flow path per unit time. The quality, thereby increasing the temperature adjustment actual power P2, to achieve temperature regulation of the battery within the target time t.

The vehicle may comprise a single battery or may be composed of a plurality of batteries connected in series, in parallel or in a mixture. As shown in Figures 14A to 14B, taking two batteries as an example, when the battery is two (first battery and second battery), the pump corresponds to two, and two pumps are positive. To the pump, one for the reverse pump.

When the temperature regulation system enters the cooling mode, the controller separately obtains P1 of each battery, the temperature adjustment actual power P2 of each battery, and the maximum cooling power P of a single compressor, and adds P1 of each battery to calculate The total temperature of the entire temperature regulation system adjusts the required power P _Z , and adds the temperature adjustment actual power P2 of each battery to obtain the total temperature adjustment actual power Pf. Wherein, the temperature adjustment required power of the first battery is P11, and the temperature adjustment required power of the second battery is P12. The temperature adjustment actual power of the first battery is P21, and the temperature adjustment actual power of the second battery is P22. The maximum cooling power P of the compressor.

If the sum of the total temperature adjustment required power P _Z and the in-vehicle cooling demand power P4 is less than or equal to the maximum cooling power P of the compressor, that is, Pz + P4 ≤ P, the compressor operates at a cooling power of P _Z + P4.

If Pz+P4>P, it is determined whether the temperature of the first battery or the second battery is greater than 45 ° C. If it is greater than 45 ° C, the cooling power is preferentially provided for battery cooling, and the controller controls the compressor 1 to operate according to the maximum cooling power P. The cooling power of the battery cooling branch 4 is Pz, and the cooling power of the in-vehicle cooling branch 3 is equal to P-Pz.

If it is determined that the battery temperature is not greater than 45 ° C, and the temperature inside the vehicle has not reached the set temperature, the cooling power is preferentially provided for the interior of the vehicle, the compressor 1 is operated according to the maximum cooling power P, and the cooling power of the cooling branch of the vehicle is P4, the battery The cooling power of the cooling branch is equal to P-P4.

If the temperature inside the vehicle has reached the set temperature, the cooling power of the battery is preferentially satisfied. The cooling power of the battery cooling branch is Pz.

The sum of the temperature-regulated actual powers of the first battery and the second battery is Pf, and when Pz>Pf, the power to be adjusted is Pc (Pc=Pz-Pf). If Pz+P4+Pc≤P, the compressor needs to increase the cooling power to Pc, increase the opening degree of the second expansion valve, and increase the rotation speed of the pump. At the same time, the following processing is performed: If P11-P21=Pc1, P12-P22=Pc2, P11>P21, P12>P22: When Pc1 is greater than the set value, the control forward pump is turned on, and the reverse pump is turned off, so that the first battery The cooling power is increased. When Pc2 is greater than the set value, the control reverse pump is turned on, and the forward pump is turned off, so that the cooling power of the second battery is increased. When Pc1>Pc2, the control forward pump is turned on, and the reverse pump is turned off, so that the cooling power of the first battery is increased. When Pc1 ≤ Pc2, the control reverse pump is turned on, and the forward pump is turned off, so that the cooling power of the second battery is increased.

And, when the temperature T61 of the first battery is greater than the temperature T62 of the second battery, the control forward pump is turned on, and the reverse pump is turned off, so that the cooling power of the first battery is increased. When the temperature T61 of the first battery is less than or equal to the temperature T62 of the second battery, the reverse pump is controlled to be turned on, and the forward pump is turned off, so that the cooling power of the battery is increased.

If P21-P11=Pc1, P22-P12=Pc2, P11≤P21, P12≤P22, it can be processed as follows: When Pc1 is greater than the set value, the control forward pump is turned off, and the reverse pump is turned on, so that the first The cooling power of the battery is reduced. When Pc2 is greater than the set value, the control reverse pump is turned off, and the forward pump is turned on, so that the cooling power of the second battery is reduced. When Pc1>Pc2, the control forward pump is turned off, and the reverse pump is turned on, so that the cooling power of the first battery is reduced. When Pc1 ≤ Pc2, the control reverse pump is turned off, and the forward pump is turned on, so that the cooling power of the second battery is reduced.

And, when the temperature T61 of the first battery is greater than the temperature T62 of the second battery, the control forward pump is turned on, and the reverse pump is turned off, so that the cooling power of the first battery is increased. When the temperature T61 of the first battery is less than or equal to the temperature T62 of the second battery, the reverse pump is controlled to be turned on, and the forward pump is turned off, so that the cooling power of the battery is increased.

In addition, when the cooling function of the first battery and the second battery is started, if the temperature of the first battery is higher than the temperature of the second battery, and the difference exceeds a preset value, the forward pump operation is controlled. In order to allow the coolant to flow through the first battery and then through the second battery, the first battery is cooled as soon as possible. And if the temperature of the second battery is higher than the temperature of the first battery, and the difference exceeds a preset value, controlling the reverse pump operation, so that the coolant first flows through the second battery and then flows through the first battery, thereby Allow the second battery to cool down as soon as possible. Thereby, by changing the flow direction of the cooling liquid, the temperature difference between the first battery and the second battery can be reduced.

When the cooling function and the heating function of the first battery and the second battery are not activated, if the temperature difference between the first battery and the second battery exceeds a preset value, the forward pump or the reverse pump can be controlled to be started. The coolant in the battery cooling branch flows to equalize the temperatures of the first battery and the second battery.

According to the temperature adjustment method of the vehicle according to the embodiment of the present invention, first, the temperature adjustment demand power of the battery is acquired, and then the temperature adjustment actual power of the battery is obtained, and finally, the required power is adjusted according to the temperature, the actual power is adjusted, the temperature inside the vehicle, and the set temperature of the air conditioner are set. The opening degree of the in-vehicle cooling branch and the battery cooling branch are adjusted. Therefore, the method adjusts the opening degree of the in-vehicle cooling branch and the battery cooling branch, and can quickly adjust the temperature when the vehicle battery temperature is too high or too low, so that the temperature of the vehicle battery is maintained at the pre-heat Set the range to avoid the situation that the performance of the vehicle battery is affected by the temperature, and also make the temperature inside the vehicle meet the demand if the temperature of the battery meets the requirements.

When the battery, the cooling branch, the in-vehicle cooling branch and the battery cooling branch are plural, the temperature regulation system of the vehicle battery includes: a plurality of cooling branches, a plurality of in-vehicle cooling branches, a plurality of battery cooling branches, and a battery temperature Adjust the module.

Wherein each refrigeration branch comprises a compressor 1 and a condenser 2 connected to the compressor 1. The plurality of in-vehicle cooling branches are respectively connected to the plurality of cooling branches. The battery temperature adjustment module 5 is connected to the battery cooling branch for acquiring the temperature adjustment required power P1 and the temperature adjustment actual power P2, and acquiring the regional temperature Tq and the air conditioning set temperature Ts of the plurality of regions in the vehicle, and adjusting the required power according to the temperature. P1, the temperature adjustment actual power P2, the complex area temperature Tq, and the air conditioning set temperature Ts adjust the opening degrees of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and the plurality of cooling branches.

Wherein, in the implementation of the present invention, the battery can be a battery pack or a battery module. Each battery cooling branch corresponds to a plurality of batteries connected in parallel or in series.

Further, according to an embodiment of the present invention, the battery temperature adjustment module 5 adjusts the required power P1, the temperature adjustment actual power P2, the complex region temperature Tq, and the air conditioner set temperature Ts to the plurality of vehicles within the target time t. The opening of the cooling branch, the plurality of battery cooling branches, and the plurality of cooling branches are adjusted to achieve the target temperature.

For example, as shown in FIG. 19 to FIG. 20, taking the cooling branch, the battery cooling branch, the in-vehicle cooling branch, and the battery as two examples, the batteries are the first battery 61 and the second battery 62, respectively. The cooling branches are respectively a first cooling branch 11 and a second cooling branch 12, and the battery cooling branches are a first battery cooling branch 401 and a second battery cooling branch 402, respectively, and the in-vehicle cooling branch circuits are respectively The first in-vehicle cooling branch 301 and the second in-vehicle cooling branch 302. 19A and 19B are batteries connected in series, and Fig. 20 is a battery connected in parallel. When the temperature of the first battery 61 and/or the second battery 62 is too high/low, the temperature adjustment of the first battery 61 and/or the second battery 62 is required. The battery temperature adjustment module 5 obtains the temperature adjustment required power P1 and the temperature adjustment actual power P2, adjusts the opening degree of the plurality of battery cooling branches according to P1 and P2 to adjust the cooling power of the battery, and the battery temperature adjustment module 5 acquires the plurality of regions. The temperature Tq and the air conditioner set the temperature Ts, and control the opening degree of each battery cooling branch according to Tq and Ts. For example, if the Tq of a certain area is high and the Tq of the other area is large, the battery temperature adjustment module 5 The opening degree of the in-vehicle cooling branch that controls the cooling of the area is increased, and the opening degree of the corresponding battery cooling branch is controlled to be reduced, and at the same time, to ensure the cooling power of the battery is unchanged, the battery temperature adjusting module 5 controls another The opening degree of the cooling branch in the vehicle is reduced, and the opening degree of the corresponding battery cooling branch is controlled to increase. Therefore, the system allocates the cooling capacity of the battery and each area in the vehicle according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only when the battery temperature is too high or when the temperature is too low. Adjustments are made to maintain the temperature of the battery within a preset range, and the temperature in each zone of the compartment can be equalized.

It can be understood that the cooling power of the battery temperature regulating module 5 is provided by the vehicle air conditioner, and the cooling capacity is shared with the in-vehicle refrigeration system, thereby reducing the volume of the temperature regulating system and making the distribution of the coolant flow more flexible.

According to an embodiment of the invention, the battery cooling branch may include a heat exchanger 41 connected to the battery temperature regulating module 5. The heat exchanger 41 may include a first pipe and a second pipe, the second pipe is connected to the battery temperature regulating module 5, and the first pipe is connected to the compressor 1, wherein the first pipe and the second pipe are adjacent to each other. . The battery temperature adjustment module 5 includes a flow path (not specifically shown) for adjusting the temperature of the battery, and the flow path is disposed in the battery. A pump 51, a medium container 52, a heater 53, and a controller (not specifically shown) are connected between the flow path and the heat exchanger 41. The controller acquires the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2 of the battery, and adjusts the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2. The in-vehicle cooling branch may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33. The battery cooling branch 4 may also include a second expansion valve 42 and a second electronic valve 43.

As shown in Fig. 20, when the batteries are connected in parallel, a valve 58 is also provided at the flow path inlet of each battery. The controller can control the flow rate of the coolant flowing into each of the batteries through the control valve 58 according to the corresponding valves P1 and P2 of each battery, so that the heating power/cooling power of each battery can be precisely controlled.

According to an embodiment of the present invention, as shown in FIGS. 19 to 20, when there are a plurality of batteries and the flow paths are connected in series, the plurality of batteries correspond to a plurality of pumps for regulating the coolant flow rate of the battery, and the pump For the two-way pump.

As shown in FIG. 19 to FIG. 20, taking two batteries as an example, when two batteries (first battery 61 and second battery 62) are connected in series, the pump corresponds to two, and two One pump is for the forward pump 511 and one for the reverse pump 522.

As shown in Fig. 19A, when the forward pump 511 is started, the flow direction of the coolant in the second pipe is: the medium container 52 - the heat exchanger 41 - the heater 53 - the forward pump 511 - the first temperature sense The detector 55 - the first battery 61 - the second battery 62 - the second temperature sensor 56 - the flow rate sensor 57 - the medium container 52. As shown in FIG. 19B, when the reverse pump 522 is activated, the flow direction of the coolant in the second pipe is: the medium container 52 - the flow rate sensor 57 - the second temperature sensor 56 - the second battery 62 - The first battery 61 - the first temperature sensor 55 - the reverse pump 512 - the heater 53 - the heat exchanger 41 - the medium container 52.

In addition, when the cooling function of the first battery 61 and the second battery 62 is activated, if the temperature of the first battery 61 is higher than the temperature of the second battery 62, and the difference exceeds a preset value, the controller controls the forward pump The 511 operates to allow the coolant to flow through the first battery 61 and then through the second battery 62, thereby causing the first battery 61 to complete the cooling as soon as possible. And if the temperature of the second battery 62 is higher than the temperature of the first battery 61, and the difference exceeds a preset value, the controller controls the reverse pump 512 to operate, so that the coolant first flows through the second battery 62, and then flows. The first battery 61 is passed, so that the second battery 62 is cooled as soon as possible. Thereby, the temperature difference between the first battery 61 and the second battery 62 can be reduced by changing the flow direction of the cooling liquid. When neither the cooling function nor the heating function of the first battery 61 and the second battery 62 is activated, if the temperature difference between the first battery 61 and the second battery 62 exceeds a preset value, the controller may control the forward pump 511. The startup is performed to cause the coolant in the battery cooling branch 4 to flow, thereby equalizing the temperatures of the first battery 61 and the second battery 62.

How to obtain the temperature adjustment required power P1 and the temperature adjustment actual power P2 will be described below in conjunction with specific embodiments.

According to an embodiment of the present invention, the controller may be configured to separately acquire a first parameter when each battery is turned on, and generate a first temperature adjustment required power of each battery according to the first parameter, and acquire each battery separately. a second parameter at the time of temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter, and adjusting the required power according to the first temperature of each battery and the second temperature adjustment required power of each battery The temperature adjustment of each battery requires power P1.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the controller acquires the first between the initial temperature and the target temperature. A temperature difference ΔT ₁ , and generating a first temperature adjustment required power according to the first temperature difference ΔT ₁ and the target time t.

Further, the controller generates the first temperature adjustment required power by the following formula (1): ΔT ₁ *C*M/t (1), where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery 6, and M is the quality of the battery.

The second parameter is the average current I of each battery within a preset time, and the controller generates a second temperature adjustment required power by the following formula (2): I ² *R, (2), where I is the average current, R It is the internal resistance of the battery.

When the battery is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the invention, the controller generates a second of each battery according to an inlet temperature detected by the first temperature sensor 55 of each circuit in which the battery is located and an outlet temperature detected by the second temperature sensor 56, respectively. The temperature difference ΔT ₂ , and the temperature-regulated actual power P2 of each battery is generated according to the second temperature difference ΔT _{2 of} each battery and the flow rate v detected by the flow rate sensor 57.

Further, according to an embodiment of the present invention, the actual power P2 is adjusted according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is in the flow path The specific heat capacity of the coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow path The cross-sectional area.

Specifically, as shown in FIG. 19 to FIG. 20, after the vehicle is powered on, the controller determines whether the vehicle needs to perform temperature adjustment. If it is determined that the vehicle needs temperature adjustment, the temperature adjustment function is turned on, and the low rotation speed information is sent to the pump 51. The pump starts working at the default speed (such as low speed). The controller can acquire an initial temperature (ie, current temperature) of each battery, a target temperature, and a target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t can be preset according to actual conditions, and according to the formula (1) Calculate the first temperature regulation required power of each battery. At the same time, the controller obtains the average current I of each battery for a preset time, and calculates the second temperature adjustment required power of each battery according to formula (2). Then, the controller calculates the temperature adjustment required power P1 according to the first temperature adjustment required power and the second temperature adjustment required power of each battery, respectively. Moreover, as shown in FIG. 19 to FIG. 20, when the batteries are connected in series, the controller acquires the first temperature sensor 55 and the second temperature sensor 56 to detect the temperature information, and separately acquires the flow rate sensor to detect The measured flow rate information is calculated according to formula (3), and the actual temperature P2 of the battery is adjusted. As shown in FIG. 20, when the batteries are connected in parallel, the controller acquires the first temperature sensor 55 and the second temperature sensor 56 corresponding to each battery to detect the temperature information, and respectively obtains the flow rate sensor. 57 The detected flow rate information is calculated according to formula (3), and the actual temperature P2 of each battery 6 is calculated.

How to adjust the plurality of in-vehicle cooling branches (30 and 30) to the plurality of battery cooling branches (401) according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the complex area temperature Tq, and the air conditioning set temperature Ts will be described below with reference to specific embodiments. And 402) and the opening of the plurality of cooling branches (11 and 12) are adjusted.

According to an embodiment of the present invention, the controller is further configured to generate the total temperature adjustment required power Pz according to the temperature adjustment required power P1 of the plurality of batteries, and determine whether the total temperature adjustment required power Pz matches the maximum cooling power P of the vehicle air conditioner, Wherein, if matched, the controller cools the battery according to the total temperature adjustment demand power P1 of the plurality of parallel batteries; if not, the controller adjusts the demand according to the maximum cooling power P of the compressor and the temperature of the plurality of battery cooling branches Power P1 cools the battery.

Specifically, as shown in FIG. 20, when the battery cooling function is turned on, the controller can calculate the total temperature adjustment required power Pz of the entire temperature adjustment system according to the temperature adjustment required power P1 of each battery, that is, the temperature of each battery. The total required temperature adjustment required power Pz can be obtained by adjusting the required power P1. Then, according to the total temperature adjustment demand power Pz, it is judged whether P _Z matches the maximum cooling power P of the vehicle air conditioner, that is, whether Pz is less than or equal to P, and if so, the controller adjusts the required power P1 according to the temperature of each battery through the control valve. 58 cool each battery. If P _Z does not match the maximum cooling power P of the vehicle air conditioner, that is, Pz is greater than P, the controller adjusts the required power P1 according to the maximum cooling power P of the air conditioner and the temperature of each battery, and proportionally adjusts the opening degree of the valve 58. Coolant flow distribution is performed so that each battery can be cooled down with maximum efficiency.

According to an embodiment of the invention, the plurality of cooling branches respectively correspond to the plurality of air outlets, and the plurality of regional temperatures are the temperatures of the plurality of air outlets.

For example, as shown in Fig. 21, four air outlets, which are an air outlet 1 - an air outlet 4, can be provided in the vehicle compartment. The corresponding zone temperature Tq is detected by detecting the tuyere temperature Tc. It is assumed that the air outlet 1 and the air outlet 2 are supplied with the cooling power by the first cooling branch 11, and the outlet 3 and the outlet 4 are provided with the cooling power by the second cooling branch 12.

According to an embodiment of the invention, the controller is further configured to detect a temperature of the plurality of batteries, and control the temperature adjustment system to enter the cooling mode when the temperature of any of the plurality of parallel batteries is greater than the first temperature threshold, and When the temperature of any of the plurality of batteries is less than the second temperature threshold, the temperature control system is controlled to enter the heating mode. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the controller instantly detects the temperature of each battery and makes a judgment. If the temperature of one of the batteries is higher than 40 °C, the temperature of the battery is too high. In order to avoid the influence of high temperature on the performance of the battery, the battery needs to be cooled, and the controller controls the temperature adjustment system to enter the cooling mode. And sending a battery cooling function to start the information to the air conditioning system, and controlling the second electronic valve 43 to open, so that the coolant exchanges heat with the battery to lower the temperature of the battery.

If the temperature of a battery is lower than 0 °C, the temperature of the battery 6 is too low. In order to avoid the influence of low temperature on the performance of the battery, the battery needs to be warmed up, and the controller controls the temperature adjustment system to enter the heating mode. The second electronic valve 43 is controlled to be closed, and the heater 53 is controlled to be turned on to provide heating power to the temperature adjustment system.

According to an embodiment of the present invention, when in the cooling mode, the controller is further configured to determine whether the battery temperature is greater than a third temperature threshold when the temperature adjustment required power P1 of the battery cooling branch is greater than the temperature adjustment actual power P2. Wherein, if the battery temperature is greater than the third temperature threshold, the controller reduces the opening degree of the plurality of in-vehicle cooling branches, and increases the opening degree of the plurality of battery cooling branches, wherein the opening degree of the plurality of battery cooling branches passes corresponding The valve (ie, the second expansion valve 42) is separately controlled, and the third temperature threshold is greater than the first temperature threshold, for example, the third temperature threshold may be 45 °C.

Specifically, when in the cooling mode, if P1 is greater than P2, the controller determines whether the temperature of the battery is greater than 45 °C. If the temperature of any of the batteries is greater than 45 ° C, indicating that the current temperature of the battery is too high, the controller reduces the opening degree of the first expansion valve 32 to reduce the coolant flow rate of the cooling branch in the vehicle, and increases the second expansion valve 42. The opening is increased to increase the coolant flow rate of the battery cooling branch. Thus, by adjusting the cooling capacity distribution of the in-vehicle cooling branch and the battery cooling branch, the temperature adjustment of the battery can be completed within the target time when the battery temperature is too high.

According to an embodiment of the present invention, in the cooling mode, the controller is further configured to obtain the temperature adjustment required power P1 of the battery and the actual temperature adjustment when the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery. The power difference between the powers P2, and increases the power of the compressor 1 for cooling the battery according to the power difference, or adjusts the coolant flow rate of the loop branch circuit of the battery to increase the cooling power of the battery, or at some The temperature adjustment demand power P1 of the battery is less than or equal to the temperature adjustment actual power P2 of the battery, reduce the power of the compressor or keep the power of the compressor unchanged, or adjust the coolant flow rate of the loop branch circuit of the battery to reduce the battery Cooling power.

Specifically, when operating in the cooling mode, if the battery is plural, the controller acquires P1 and P2 of each battery, respectively, and makes a judgment. If the P1 of one of the batteries is greater than P2, it means that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the coolant flow rate, the controller obtains the power difference between P1 and P2 of the battery. And increasing the power of the compressor 1 according to the power difference, or increasing the coolant flow rate of the loop branch circuit of the battery to increase the cooling power of the battery, wherein the power difference between P1 and P2 is larger, the power of the compressor 1 is The more the coolant flow rate of the battery is increased, so that the temperature of the battery is lowered to the target temperature within a preset time t. And if P1 of one of the batteries is less than or equal to P2, the power of the compressor 1 can be kept constant or the power of the compressor 1 can be appropriately reduced, or the coolant flow rate of the loop branch circuit of the battery can be reduced, and the cooling of the battery can be reduced. power. When the temperature of all the batteries is lower than 35 ° C, the battery cooling is completed, and the controller sends information for turning off the temperature adjustment function to the vehicle air conditioner through the CAN communication, and controls the second electronic valve 43 to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery is still higher than 35 ° C, the controller appropriately increases the power of the compressor to complete the cooling of the battery as soon as possible.

According to an embodiment of the present invention, the controller is further configured to reduce the opening degree of the plurality of in-vehicle cooling branches when the temperature of the battery is less than the third temperature threshold and the indoor temperature is equal to the air conditioning set temperature Ts, and Increase the opening of the cooling branch of the multiple battery.

Specifically, when it is in the cooling mode, if the temperature of each battery is less than 45 ° C, the controller determines whether the temperature inside the vehicle reaches the air-conditioning set temperature Ts. If so, the controller reduces the opening degree of the first expansion valve 32 and increases the opening degree of the second expansion valve 42 to increase the coolant flow rate of the battery cooling branch and reduce the coolant of the cooling branch in the vehicle. Flow, complete the battery cooling as soon as possible. On the other hand, if the temperature inside the vehicle does not reach the air-conditioning set temperature Ts, the cooling demand in the vehicle is preferentially satisfied, and the controller increases the opening degree of the first expansion valve 32 and reduces the opening degree of the second expansion valve 42.

In addition, the battery temperature was also processed hierarchically, and the critical values of temperature control were 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery cooling is completed. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature does not exceed 45 ° C, the cooling demand in the vehicle is still prioritized, and if the cooling power in the vehicle is sufficient and reaches equilibrium, the controller increases. The battery cools the opening of the branch to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

According to an embodiment of the invention, the controller is further configured to obtain a temperature difference between the plurality of regional temperatures, and when the temperature difference is greater than the fourth temperature threshold, the in-vehicle cooling corresponding to the cooling branch where the high temperature air outlet is located The opening degree of the branch road is increased, and the opening degree of the battery cooling branch corresponding to the cooling branch where the high temperature air outlet is located is lowered. The fourth temperature threshold may be preset according to actual conditions, for example, may be 3 ° C.

Further, according to an embodiment of the present invention, the controller is further configured to reduce the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the low temperature air outlet is located, and correspond to the cooling branch where the low temperature air outlet is located The opening of the battery cooling branch is increased.

Specifically, in the battery cooling process, if the air conditioner needs to be turned on in the vehicle, the ambient temperature in the vehicle compartment needs to be monitored and controlled, so that the ambient temperature throughout the vehicle is balanced, and at the same time, the battery cooling requirement can be met. As shown in FIG. 21, when it is detected that the regional temperature Tq at the air outlet 1 and the air outlet 2 is higher than the temperature Tq of the vicinity of the air outlet 3 and the air outlet 4 by more than 3 ° C, the first in-vehicle cooling branch 301 is controlled. The opening degree of the first expansion valve 32 is increased while controlling the opening degree of the second expansion valve 42 in the first battery cooling branch 401 to decrease, so that the cooling power in the first in-vehicle cooling branch 301 is increased. . The controller also controls the opening degree of the first expansion valve 32 in the second in-vehicle cooling branch 302 to decrease, and the opening degree of the second expansion valve 42 in the second battery cooling branch 402 is increased to make the second car The cooling power in the internal cooling branch 302 is small. Thereby, the cooling power of the first battery cooling 301 and the second battery cooling branch 302 can be made constant, and at the same time, the temperature in the vicinity of the air outlets in the vehicle is equalized. When the vehicle air conditioner detects the air outlet 1, the air temperature Tq near the air outlet 2, the air outlet 3, and the air temperature Tq in the vicinity of the air outlet 4, the controller controls the first interior cooling branch 301 and The first expansion valve 32 in the second in-vehicle cooling branch 302 has the same opening degree to ensure that the cooling powers of the first in-vehicle cooling branch 301 and the second in-vehicle cooling branch 302 are the same.

According to an embodiment of the present invention, when in the heating mode, the controller acquires the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery when the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery. The power difference between the power, and the power of the heater for heating the battery is increased according to the power difference, or the coolant flow rate of the loop branch circuit of the battery is increased to increase the heating power of the battery, and in a certain battery When the temperature adjustment required power P1 is less than or equal to the temperature of the battery to adjust the actual power P2, the power of the heater is reduced or the power of the heater is kept constant, or the coolant flow rate of the loop circuit of the battery is adjusted to reduce the battery flow. heating power.

Specifically, when in the heating mode, the controller acquires P1 and P2 of each battery, respectively, and makes a determination. If P1 of one of the batteries is greater than P2, it means that if the heating of the battery cannot be completed within the target time according to the current heating power or the flow rate of the coolant, the controller obtains the power difference between P1 and P2 of the battery. And increasing the power of the heater 53 for heating the battery according to the power difference, or by adjusting the rotation speed of the corresponding pump 51 to increase the coolant flow rate of the loop branch circuit of the battery, so that the battery can be at the target time. Temperature adjustment is completed within t. Among them, the larger the difference between P1 and P2, the more the power of the heater 53 is increased. If the P1 of a certain battery is less than or equal to P2, the controller can appropriately reduce the power of the heater 53 to save power, or reduce the cooling of the loop branch circuit of the battery by adjusting the rotation speed of the corresponding pump 51. The liquid flow rate is to reduce the heating power or to keep the power of the heater 53 unchanged. When the temperature of all the batteries is higher than the preset temperature, for example, 10 ° C, the battery heating is completed, and the controller sends the information of the temperature adjustment function to the vehicle air conditioner through the CAN communication, and controls the heater 53 to be turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery is still lower than 10 ° C, the controller further increases the power of the heater 53 to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, the controller is further configured to reduce the rotation speed of the pump 51 when the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, and adjust the temperature requirement of a certain battery. When the power P1 is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump 51 is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the P1 of a certain battery is less than P2, the controller controls the rotation speed of the corresponding pump 51 to be reduced to save power. If the P1 of a certain battery 6 is greater than P2, the controller controls the power of the corresponding heater 53 or the compressor 1 to increase or the coolant flow rate of the circuit in which the battery is located to increase, and also controls the rotation speed of the pump 51 to increase. The quality of the coolant flowing through the cross section of the cooling flow path per unit time increases the temperature adjustment actual power P2 of the battery to achieve temperature regulation within the target time t.

According to an embodiment of the present invention, as shown in FIG. 20, the plurality of batteries are connected in parallel, and the controller is further configured to increase the temperature of the battery when the temperature difference between the batteries exceeds a set value when in the cooling mode. Cooling power; when in the heating mode, when the temperature difference between the batteries exceeds a set value, the heating power of the battery having a lower temperature is increased. Among them, the set value can be 3 °C.

Specifically, as shown in FIG. 20, when the batteries are connected in parallel, a valve 58 is further provided at the flow path inlet of each battery, and when in the cooling mode, when the temperature difference between the batteries exceeds 3 ° C, then control is performed. By increasing the opening of the valve 58 in the battery cooling branch where the higher temperature battery is located, the cooling power of the higher temperature battery is increased. In the heating mode, when the temperature difference between the batteries exceeds 3 ° C, the controller increases the opening degree of the valve 58 in the battery cooling branch where the lower temperature battery is located to increase the heating power of the lower temperature battery. .

According to an embodiment of the present invention, as shown in FIG. 20, the plurality of batteries are connected in parallel, and in the cooling mode, the controller individually controls the coolant flow rate of each branch flow path, and can adjust the demand according to the temperature of each battery. Power, adjust the coolant flow rate of each battery pack flow path so that the real temperature adjustment actual power and temperature demand power of each battery are equal.

Specifically, as shown in FIG. 20, when in the cooling mode, the controller can control the coolant flow rates of the first battery cooling branch 401 and the second battery cooling branch 402 by controlling the opening degree of the second expansion valve 42, respectively. And controlling the flow rate of the coolant flowing into the flow paths of the first battery 61 and the second battery 62 by controlling the opening degree of the valve 58, respectively, so that the real temperature adjustment actual power P1 and the temperature demand power P2 of each battery are equal, as soon as possible Complete the temperature adjustment of the battery.

According to an embodiment of the present invention, as shown in FIG. 19 to FIG. 20, when the battery is plural and the flow paths are connected in series, the plurality of batteries correspond to a plurality of pumps for regulating the coolant flow rate of the battery, and the pump is Two-way pump.

In order to make the present invention more clearly understood by those skilled in the art, the working procedure of the temperature regulation system of the vehicle battery will be described below with reference to specific examples.

The main difference between Fig. 19 and Fig. 14A is that the addition of a compressor refrigeration circuit is increased, and the temperature regulation between the air outlet of the air conditioner and the power adjustment between the compressors is increased. Only the differences are listed below, and the rest are not to be described.

As shown in Fig. 19, when there are a plurality of batteries, when the temperature adjustment system enters the cooling mode, the controller acquires P1 of each battery 6, the temperature-regulated actual power P2 of each battery, and the maximum cooling power of a single compressor. P, and add P1 of each battery to calculate the total temperature adjustment demand power Pz of the entire temperature regulation system, add the temperature adjustment actual power P2 of each battery to obtain the total temperature adjustment actual power Pf, and compress each The maximum cooling power of the machine is added to calculate the sum of the maximum cooling powers of all the compressors, P5. P51 is the maximum cooling power of the compressor 11, P52 is the maximum cooling power of the compressor 12, and P5 is the sum of the maximum cooling power of all the compressors, P5 = P51 + P52. The temperature adjustment required power of the first battery 61 is P11, and the temperature adjustment required power of the second battery 62 is P12. The temperature adjustment actual power of the first battery 61 is P21, and the temperature adjustment actual power of the second battery 62 is P22.

If Pz ≤ P51, then only one compressor 1 needs to be controlled to provide cooling power, and two compressors 1 can also be controlled to work together. If P51 < Pz ≤ P5, two compressors are required to work together, and the initial cooling power of each compressor may be Pz/2, or other power combinations such that the sum of the cooling powers of the two compressors is Pz. If Pz > P5, two compressors are required to work together, and each compressor operates at maximum cooling power. The temperature regulation required power of the in-vehicle cooling branch is P4, that is, P4 is the power required to adjust the interior temperature to the set temperature.

When the interior cooling and the battery cooling are simultaneously turned on, it is assumed that the temperature of the air outlet 1 and the air outlet 2 is T51, and the temperature of the air outlet 3 and the air outlet 4 is T52.

If T51-T52≥Tc and Tc is 3°C, the following processing is performed: If Pz+P4≤P5, the cooling power of the first compressor 11 is controlled to be increased, or the battery cooling circuit in the refrigeration circuit of the first compressor 11 is controlled. The opening degree of the expansion valve is reduced, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the expansion valve opening of the cooling circuit in the vehicle is controlled. The reduction makes the temperature of T51 decrease rapidly, and at the same time meets the cooling power requirement of the battery to achieve the temperature balance inside the vehicle.

If Pz+P4>P5, controlling the first compressor 11 and the second compressor 12 to operate at the maximum cooling power, while controlling the expansion valve opening degree of the battery cooling circuit in the refrigeration circuit of the first compressor 11 to be reduced, and controlling the vehicle The opening of the expansion valve of the internal cooling circuit is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, so that the temperature of the T51 is rapidly decreased, and at the same time It also meets the cooling power requirements of the battery to achieve a balanced internal temperature of the vehicle.

If T51-T52≥Tc and Tc is 3°C, the following processing may be performed: controlling the closing of the battery cooling circuit in the refrigeration circuit of the first compressor 11, and controlling the opening of the expansion valve of the cooling circuit in the vehicle to increase, so that the first compression All of the cooling power of the machine 11 is used for in-vehicle cooling. At the same time, the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, and the cooling power of the battery is increased, so that the temperature of the T51 is rapidly decreased, and the cooling of the battery is satisfied. Power demand to achieve a balanced environment temperature inside the car.

The main difference between Fig. 20 and Fig. 9 is that the addition of a compressor refrigeration circuit is increased, and the temperature regulation between the air outlet of the air conditioner in the vehicle and the power adjustment between the compressors is increased. Only the differences are listed below, and the rest are not to be described.

As shown in Fig. 20, when there are a plurality of batteries, when the temperature adjustment system enters the cooling mode, the controller acquires P1 of each battery 6, the temperature-regulated actual power P2 of each battery, and the maximum cooling power of a single compressor. P, and add P1 of each battery to calculate the total temperature adjustment demand power Pz of the entire temperature regulation system, add the temperature adjustment actual power P2 of each battery to obtain the total temperature adjustment actual power Pf, and compress each The maximum cooling power of the machine is added to calculate the sum of the maximum cooling powers of all the compressors, P5. P51 is the maximum cooling power of the compressor 11, P52 is the maximum cooling power of the compressor 12, and P5 is the sum of the maximum cooling power of all the compressors, P5 = P51 + P52. The temperature adjustment required power of the first battery 61 is P11, and the temperature adjustment required power of the second battery 62 is P12. The temperature adjustment actual power of the first battery 61 is P21, and the temperature adjustment actual power of the second battery 62 is P22.

If Pz ≤ P51, then only one compressor 1 needs to be controlled to provide cooling power, and two compressors 1 can also be controlled to work together. If P51 < Pz ≤ P5, two compressors are required to work together, and the initial cooling power of each compressor may be Pz/2, or other power combinations such that the sum of the cooling powers of the two compressors is Pz. If Pz > P5, two compressors are required to work together, and each compressor operates at maximum cooling power. The temperature regulation required power of the in-vehicle cooling branch is P4, that is, P4 is the power required to adjust the interior temperature to the set temperature.

When the interior cooling and the battery cooling are simultaneously turned on, it is assumed that the temperature of the air outlet 1 and the air outlet 2 is T51, and the temperature of the air outlet 3 and the air outlet 4 is T52.

If T51-T52≥Tc and Tc is 3°C, the following processing is performed: If Pz+P4≤P5, the cooling power of the first compressor 11 is controlled to be increased, or the battery cooling circuit in the refrigeration circuit of the first compressor 11 is controlled. The opening degree of the expansion valve is reduced, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the expansion valve opening of the cooling circuit in the vehicle is controlled. The reduction makes the temperature of T51 decrease rapidly, and at the same time meets the cooling power requirement of the battery to achieve the temperature balance inside the vehicle.

If Pz+P4>P5, controlling the first compressor 11 and the second compressor 12 to operate at the maximum cooling power, while controlling the expansion valve opening degree of the battery cooling circuit in the refrigeration circuit of the first compressor 11 to be reduced, and controlling the vehicle The opening of the expansion valve of the internal cooling circuit is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, so that the temperature of the T51 is rapidly decreased, and at the same time It also meets the cooling power requirements of the battery to achieve a balanced internal temperature of the vehicle.

If T51-T52≥Tc and Tc is 3°C, the following processing may be performed: controlling the closing of the battery cooling circuit in the refrigeration circuit of the first compressor 11, and controlling the opening of the expansion valve of the cooling circuit in the vehicle to increase, so that the first compression All of the cooling power of the machine 11 is used for in-vehicle cooling. At the same time, the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, and the cooling power of the battery is increased, so that the temperature of the T51 is rapidly decreased, and the cooling of the battery is satisfied. Power demand to achieve a balanced environment temperature inside the car. According to the temperature regulation system of the vehicle battery according to the embodiment of the present invention, the cooling capacity of each area in the battery and the vehicle compartment can be allocated according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only in the battery temperature When the temperature is too high or too low, the temperature is adjusted to maintain the temperature of the battery within a preset range, and the temperature in each area of the vehicle can be equalized.

When the temperature regulation system of the vehicle battery includes a plurality of battery cooling branches, a plurality of in-vehicle cooling branches, and a plurality of cooling branches, as shown in FIG. 22, the method for adjusting the temperature of the vehicle battery includes the following steps: S1 ''', respectively The temperature regulation required power P1 and the temperature adjustment actual power P2 of the plurality of batteries in the plurality of battery cooling branches. Among them, the battery cooling branch is used to adjust the temperature of the corresponding battery.

According to an embodiment of the present invention, as shown in FIG. 23, separately obtaining the temperature adjustment required power of the plurality of batteries specifically includes: S11''', respectively acquiring the first parameter when each battery is turned on, and according to the first The parameters produce a first temperature regulated demand power for each battery.

S12'', obtaining a second parameter of each battery during temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter.

S13''', the temperature adjustment required power P1 of the battery cooling branch is generated according to the first temperature adjustment required power and the second temperature adjustment required power of each battery.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the first temperature adjustment requirement is generated according to the first parameter. The power specifically includes: acquiring a first temperature difference ΔT ₁ between the initial temperature and the target temperature; generating the first temperature adjustment required power according to the first temperature difference ΔT ₁ and the target time t.

Further, according to an embodiment of the present invention, the first temperature adjustment required power is generated by the following formula (1): ΔT ₁ *C*M/t, (1) where ΔT ₁ is between the initial temperature and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is the average current I of the battery for a preset time, and the second temperature adjustment required power is generated by the following formula (2): I ² *R, (2) where I is the average Current, R is the internal resistance of the battery.

When the battery is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the present invention, as shown in FIG. 23, acquiring the temperature-regulated actual power P2 of the plurality of batteries specifically includes: S14''', obtaining an inlet temperature and an outlet temperature of a flow path for adjusting the temperature of the plurality of batteries, and Obtain the flow rate v of the coolant inflow path.

S15', generating a second temperature difference ΔT _{2 of the} plurality of batteries according to the flow path inlet temperature and the outlet temperature of the plurality of batteries.

S16', generating a temperature-regulated actual power P2 of the plurality of batteries according to the second temperature difference ΔT _{2 of the} plurality of batteries and the flow rate v.

Further, according to an embodiment of the present invention, the temperature-adjusted actual power P2 is generated according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is the flow path The specific heat capacity of the medium coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow The cross-sectional area of the road.

S2''' acquires the area temperature Tq and the air-conditioning set temperature Ts of the plurality of areas in the vehicle, respectively.

S3''', adjust the opening degree of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches and the plurality of cooling branches according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the complex area temperature Tq, and the air conditioning set temperature Ts .

Further, according to an embodiment of the present invention, the plurality of in-vehicle cooling branches and the plurality of battery coolings are performed within the target time t according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the plurality of the area temperature Tq, and the air conditioning set temperature Ts. The opening of the branch and the complex cooling branch is adjusted to reach the target temperature.

As shown in Figures 19 through 20, each battery cooling branch corresponds to a plurality of batteries connected in parallel or in series.

Specifically, taking the cooling branch, the battery cooling branch, the in-vehicle cooling branch, and the battery as two examples, the batteries are a first battery and a second battery, respectively, and the cooling branches are respectively a first cooling branch and a second The cooling branch circuit and the battery cooling branch are respectively a first battery cooling branch and a second battery cooling branch, and the in-vehicle cooling branch circuit is a first in-vehicle cooling branch and a second in-vehicle cooling branch, respectively. When the temperature of the first battery and/or the second battery is too high/low, the temperature adjustment of the first battery and/or the second battery is required. Obtaining the temperature adjustment demand power P1 and the temperature adjustment actual power P2, adjusting the opening degree of the plurality of battery cooling branches according to P1 and P2, adjusting the cooling power of the battery, and acquiring the plurality of regional temperature Tq and the air conditioning set temperature Ts, and according to Tq and Ts controls the opening degree of each battery cooling branch. For example, if the Tq of a certain area is higher and the Tq of the other area is larger, the opening degree of the in-vehicle cooling branch that controls the cooling of the area is increased, and the control is controlled. The opening degree of the corresponding battery cooling branch is reduced, and at the same time, in order to ensure that the cooling power of the battery is constant, the opening degree of controlling the cooling branch of the other vehicle is reduced, and the opening degree of the corresponding battery cooling branch is controlled to be increased. . Therefore, the method allocates the cooling capacity of each area in the battery and the car according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only when the battery temperature is too high or when the temperature is too low. Adjustments are made to maintain the temperature of the battery within a preset range, and the temperature in each zone of the compartment can be equalized.

Hereinafter, how to adjust a plurality of in-vehicle cooling branches, a plurality of battery cooling branches, and a plurality of cooling branches according to a temperature adjustment demand power P1, a temperature adjustment actual power P2, a plurality of area temperatures Tq, and an air conditioning set temperature Ts according to specific embodiments will be described. The opening is adjusted.

According to an embodiment of the present invention, as shown in FIG. 23, when the plurality of vehicle batteries are plural, and the plurality of in-vehicle cooling branches, the battery cooling branch, and the cooling branch are plural, the temperature adjustment method of the above-mentioned vehicle battery is further may include: S31 ''', P1 produce a total power demand P _Z temperature was adjusted according to the temperature required power adjustment of each cell.

S32''', it is judged whether the total temperature adjustment required power P _Z matches the maximum cooling power P of the vehicle air conditioner.

S33''', if matched, cools the battery according to the temperature adjustment required power of the plurality of batteries.

S34'', if not matched, the battery is cooled according to the maximum cooling power P of the compressor and the temperature adjustment required power P1 of the plurality of battery cooling branches.

Specifically, when the battery is in parallel, the total temperature adjustment required power Pz of the entire temperature adjustment system can be calculated according to the temperature adjustment required power P1 of each battery, that is, the temperature adjustment required power P1 of each battery can be added. The total temperature adjustment required power Pz is obtained. Then, according to the total temperature adjustment demand power Pz, it is judged whether Pz matches the maximum cooling power P of the vehicle air conditioner, that is, whether P _Z is less than or equal to P, and if so, the required power P1 is adjusted according to the temperature of each battery by controlling the battery cooling branch. The valves in the road cool each battery. If the Pz does not match the maximum cooling power P of the vehicle air conditioner, that is, Pz is greater than P, the required power P1 is adjusted according to the maximum cooling power P of the air conditioner and the temperature of each battery, and the opening of the valve in the cooling branch of the battery is adjusted. The coolant flow distribution is scaled so that each battery can be cooled down with maximum efficiency.

According to an embodiment of the invention, the temperature adjustment method of the battery may further include the step of detecting the temperature of the plurality of batteries. When the temperature of any of the plurality of batteries is greater than the first temperature threshold, the cooling mode is entered. When the temperature of any of the plurality of batteries is less than the second temperature threshold, the heating mode is entered. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the temperature of each battery is instantly detected and judged. If the temperature of one of the batteries is higher than 40 °C, the temperature of the battery is too high. In order to avoid the influence of high temperature on the performance of the battery, the battery needs to be cooled, enters the cooling mode, and sends the battery cooling function. Start the information to the air conditioning system. If the temperature of a battery is lower than 0 °C, the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, the battery needs to be warmed up, enters the heating mode, and controls the corresponding battery cooling. The branch is closed and the heater is turned on to provide heating power to the battery.

According to an embodiment of the present invention, as shown in FIG. 21, the plurality of cooling branches respectively correspond to the plurality of air outlets, and the temperature of the plurality of regions is the temperature of the plurality of air outlets.

For example, as shown in Fig. 21, four air outlets, which are an air outlet 1 - an air outlet 4, can be provided in the vehicle compartment. The corresponding zone temperature Tq is detected by detecting the tuyere temperature Tc. It is assumed that the air outlet 1 and the air outlet 2 are supplied with the cooling power by the first cooling branch 11, and the outlet 3 and the outlet 4 are provided with the cooling power by the second cooling branch 12.

According to an embodiment of the present invention, when in the cooling mode, the required power P1, the temperature-adjusted actual power P2, the complex region temperature Tq, and the air-conditioning set temperature Ts are adjusted according to the temperature to the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and The opening degree of the plurality of cooling branches is adjusted, specifically: when the temperature adjustment required power P1 of the battery cooling branch is greater than the temperature adjustment actual power P2, it is determined whether the battery temperature is greater than the third temperature threshold. Wherein, the third temperature threshold is greater than the first temperature threshold, for example, the third temperature threshold may be 45 °C. If the battery temperature is greater than the third temperature threshold, the opening of the plurality of in-vehicle cooling branches is reduced, and the opening of the plurality of battery cooling branches is increased. Wherein, the opening degree of the plurality of battery cooling branches is separately controlled by the corresponding valves.

Specifically, when in the cooling mode, if P1 is greater than P2, it is determined whether the temperature of the battery is greater than 45 °C. If the temperature of any of the batteries is greater than 45 ° C, the current temperature of the battery is too high, and the opening degree of the first expansion valve 32 is reduced to reduce the coolant flow rate of the cooling branch in the vehicle while increasing the opening of the second expansion valve 42. Degree to increase the coolant flow rate of the battery cooling branch. Thus, by adjusting the cooling capacity distribution of the in-vehicle cooling branch and the battery cooling branch, the temperature adjustment of the battery can be completed within the target time when the battery temperature is too high.

According to an embodiment of the present invention, when in the cooling mode, the required power P1, the temperature-adjusted actual power P2, the complex region temperature Tq, and the air-conditioning set temperature Ts are adjusted according to the temperature to the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and The adjustment of the opening degree of the plurality of cooling branches further includes: determining whether the temperature adjustment required power P1 of each battery is greater than the temperature adjustment actual power P2 of the battery; if the temperature adjustment required power P1 of a battery is greater than the temperature adjustment actual power of the battery P2, obtaining the power difference between the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2, and adding the power difference to increase the power of the compressor for cooling the battery, or adjusting the loop circuit of the battery to increase the loop Coolant flow to increase the cooling power of the battery; if the temperature regulation demand power P1 of a battery is less than or equal to the battery temperature adjustment actual power P2, reduce the power of the compressor or keep the power of the compressor unchanged, or adjust Reduce the coolant flow in the loop circuit of the battery to reduce the cooling power of the battery.

Specifically, when operating in the cooling mode, if the battery is plural, P1 and P2 of each battery are respectively acquired, and judgment is made. If the P1 of one of the batteries is greater than P2, it means that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and according to The power difference increases the power of the compressor 1, or increases the coolant flow rate of the loop circuit of the battery to increase the cooling power of the battery, wherein the power difference between P1 and P2 is greater, the power of the compressor and the battery The more the coolant flow rate is increased, so that the temperature of the battery is lowered to the target temperature within a preset time t. If P1 of one of the batteries is less than or equal to P2, the power of the compressor can be kept constant or the power of the compressor can be appropriately reduced, or the coolant flow rate of the loop branch circuit of the battery can be reduced, and the cooling power of the battery can be reduced. When the temperature of all the batteries is lower than 35 °C, the battery cooling is completed, the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the second electronic valve is controlled to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery is still higher than 35 ° C, then the power of the compressor is appropriately increased to allow the battery to complete the cooling as soon as possible.

According to an embodiment of the present invention, if the battery temperature is less than the third temperature threshold, it is further determined whether the interior temperature is equal to the air conditioning set temperature Ts; if the interior temperature is equal to the air conditioning set temperature Ts, the plurality of in-vehicle cooling branches are reduced The opening degree and the opening degree of the plurality of battery cooling branches are increased.

Specifically, when it is in the cooling mode, if the temperature of each battery is less than 45 ° C, the controller determines whether the temperature inside the vehicle reaches the air-conditioning set temperature Ts. If it is reached, increase the coolant flow rate of the battery cooling branch, reduce the coolant flow rate of the cooling branch in the vehicle, and complete the cooling of the battery as soon as possible. If the temperature inside the vehicle does not reach the set temperature Ts of the air conditioner, the cooling demand in the vehicle is preferentially satisfied, and the controller increases the coolant flow rate of the cooling branch in the vehicle and reduces the coolant flow rate of the battery cooling branch.

In addition, the battery temperature was processed hierarchically, and the critical values of temperature control were 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery cooling is completed. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature does not exceed 45 ° C, the cooling demand in the vehicle is still prioritized, and if the cooling power in the vehicle is sufficient and reaches equilibrium, the battery cooling is increased. The opening of the branch to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

According to an embodiment of the invention, reducing the opening degree of the plurality of in-vehicle cooling branches specifically comprises: obtaining a temperature difference between the plurality of zone temperatures. Determine if the temperature difference is greater than the fourth temperature threshold. If the temperature difference is greater than the fourth temperature threshold, the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the high temperature air outlet is located is increased, and the cooling branch corresponding to the high temperature air outlet is selectively selected. The opening of the battery cooling branch is reduced. The fourth temperature threshold may be preset according to actual conditions, for example, may be 3 ° C.

Further, according to an embodiment of the present invention, the method for adjusting the temperature of the vehicle battery further includes: reducing the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the low temperature air outlet is located, and placing the air outlet having a low temperature The opening of the battery cooling branch corresponding to the cooling branch is increased.

Specifically, in the battery cooling process, if the air conditioner needs to be turned on in the vehicle, the ambient temperature in the vehicle compartment needs to be monitored and controlled, so that the ambient temperature throughout the vehicle is balanced, and at the same time, the battery cooling requirement can be met. As shown in Fig. 21, when it is detected that the temperature Tq of the air outlet 1 and the air outlet 2 is higher than the temperature Tq of the vicinity of the air outlet 3 and the air outlet 4 by more than 3 ° C, the first in-vehicle cooling branch is increased. The opening degree in the first battery reduces the opening degree in the first battery cooling branch so that the cooling power in the first in-vehicle cooling branch is large. Optionally, the cold opening degree in the second in-vehicle cooling branch is reduced, and the opening degree of the second battery cooling branch is increased to make the cooling power in the second in-vehicle cooling branch smaller. Thereby, the cooling power of the first battery cooling and the second battery cooling branch can be made constant, and at the same time, the temperature in the vicinity of the air outlets in the vehicle is equalized. When the vehicle air conditioner detects the air temperature at the air outlet 1, the air temperature Tq near the air outlet 2, and the temperature difference Tq in the vicinity of the air outlet 3 and the air outlet 4 are within 3 ° C, the first in-vehicle cooling branch and the second vehicle are controlled. The first expansion valve in the inner cooling branch has the same opening degree to ensure that the cooling power of the first in-vehicle cooling branch and the second in-vehicle cooling branch are the same.

According to an embodiment of the present invention, when in the heating mode, the method further comprises: determining whether the temperature adjustment required power P1 of a certain battery is greater than the temperature adjustment actual power P2 of the battery. If the temperature adjustment required power P1 of a battery is greater than the temperature-adjusted actual power P2 corresponding to the battery, the power difference between the temperature adjustment required power P1 of the battery and the temperature adjustment actual power P2 is obtained, and is increased for cooling according to the power difference. The power of the heater of the battery, or the increase in the coolant flow of the loop circuit of the battery to increase the heating power of the battery. If the temperature adjustment required power P1 of a battery is less than or equal to the temperature-adjusted actual power P2 of the battery, the power of the heater is reduced or the power of the heater is kept constant, or the coolant of the loop branch circuit of the battery is adjusted to be reduced. Flow to reduce the heating power of the battery.

Specifically, when in the heating mode, P1 and P2 of each battery are respectively acquired and judged. If the P1 of one of the batteries is greater than P2, it means that if the heating temperature of the battery cannot be completed within the target time according to the current heating power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and according to The power difference is increased by the power of the heater for heating the battery, or by adjusting the rotation speed of the corresponding pump to increase the coolant flow rate of the loop branch circuit of the battery, so that the battery can complete the temperature within the target time t Adjustment. Among them, the greater the difference between P1 and P2, the more the power of the heater increases. If the P1 of a battery is less than or equal to P2, the power of the heater can be appropriately reduced to save power, or the coolant flow rate of the loop branch circuit of the battery can be reduced by adjusting the rotation speed of the corresponding pump to Reduce the heating power or keep the power of the heater constant. When the temperature of all the batteries is higher than the preset temperature, for example, 10 ° C, the battery is heated, and the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the heater is turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery is lower than 10 ° C, the power of the heater is appropriately increased to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, the temperature adjustment method of the vehicle battery may further include: if the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, reducing the rotation speed of the pump in the flow path of the battery; If the temperature adjustment demand power P1 of a certain battery is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump in the flow path of the battery is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the P1 of a certain battery is less than P2, the rotation speed of the corresponding pump is controlled to be reduced to save power. If the P1 of a certain battery is greater than P2, the controller controls the increase of the power of the corresponding heater or the compressor or the coolant flow of the circuit in which the battery is located, and also controls the rotation speed of the pump to increase the flow per unit time. The temperature of the coolant in the cross section of the cooling passage is increased, thereby increasing the temperature adjustment actual power P2 of the battery to achieve temperature regulation within the target time t.

According to an embodiment of the invention, when the battery is plural and the flow paths are connected in series, the plurality of batteries correspond to a plurality of pumps for regulating the coolant flow rate of the battery, and the pump is a two-way pump.

As shown in Fig. 19 to Fig. 20, taking two batteries as an example, when the battery is one (first battery and second battery) and connected in series, the pump corresponds to two, and two pumps One is a positive pump and the other is a reverse pump.

As shown in Fig. 19A, when the forward pump is started, the flow direction of the coolant in the second pipe is: medium container - heat exchanger - heater - forward pump - first temperature sensor - first Battery - Second Battery - Second Temperature Sensor - Flow Sensor - Media Container. As shown in Fig. 19B, when the reverse pump is activated, the flow direction of the coolant in the second pipe is: medium container - flow rate sensor - second temperature sensor - second battery - first battery - A temperature sensor - a reverse pump - a heater - a heat exchanger - a media container.

When the cooling function of the first battery and the second battery is started, if the temperature of the first battery is higher than the temperature of the second battery, and the difference exceeds a preset value, the forward pump is controlled to operate so that the coolant flows first. The first battery is passed through the second battery, so that the first battery is cooled as soon as possible. And if the temperature of the second battery is higher than the temperature of the first battery, and the difference exceeds a preset value, controlling the reverse pump operation, so that the coolant first flows through the second battery and then flows through the first battery, thereby Allow the second battery to cool down as soon as possible. Thereby, by changing the flow direction of the cooling liquid, the temperature difference between the first battery and the second battery can be reduced. When the cooling function and the heating function of the first battery and the second battery are not activated, if the temperature difference between the first battery and the second battery exceeds a preset value, the forward pump or the reverse pump can be controlled to be started. The coolant in the battery cooling branch flows to equalize the temperatures of the first battery and the second battery.

In order to make the present invention more clearly understood by those skilled in the art, the working procedure of the temperature regulation system of the vehicle battery will be described below with reference to specific examples.

The main difference between Fig. 19 and Fig. 14A is that the addition of a compressor refrigeration circuit is increased, and the temperature regulation between the air outlet of the air conditioner and the power adjustment between the compressors is increased. Only the differences are listed below, and the rest are not to be described.

As shown in Fig. 19, when there are a plurality of batteries, when the temperature adjustment system enters the cooling mode, the controller acquires P1 of each battery, temperature adjustment actual power P2 of each battery, and maximum cooling power of a single compressor. And adding P1 of each battery to calculate the total temperature adjustment demand power P _Z of the entire temperature regulation system, adding the temperature adjustment actual power P2 of each battery to obtain the total temperature adjustment actual power Pf, each compression The maximum cooling power of the machine is added to calculate the sum of the maximum cooling powers of all the compressors, P5. P51 is the maximum cooling power of the compressor 11, P52 is the maximum cooling power of the compressor 12, and P5 is the sum of the maximum cooling power of all the compressors, P5 = P51 + P52. Wherein, the temperature adjustment required power of the first battery is P11, and the temperature adjustment required power of the second battery is P12. The temperature adjustment actual power of the first battery 61 is P21, and the temperature adjustment actual power of the second battery 62 is P22.

If Pz ≤ P51, then only one compressor needs to be controlled to provide cooling power, and two compressors can also be controlled to work together. If P51 < Pz ≤ P5, two compressors are required to work together, and the initial cooling power of each compressor may be Pz/2, or other power combinations such that the sum of the cooling powers of the two compressors is Pz. If Pz > P5, two compressors are required to work together, and each compressor operates at maximum cooling power. The temperature regulation required power of the in-vehicle cooling branch is P4, that is, P4 is the power required to adjust the interior temperature to the set temperature.

When the interior cooling and the battery cooling are simultaneously turned on, it is assumed that the temperature of the air outlet 1 and the air outlet 2 is T51, and the temperature of the air outlet 3 and the air outlet 4 is T52.

If T51-T52≥Tc and Tc is 3°C, the following processing is performed: If Pz+P4≤P5, the cooling power of the first compressor 11 is controlled to be increased, or the expansion of the battery cooling circuit in the first compressor refrigeration circuit is controlled. The opening degree of the valve is decreased, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor is controlled to increase, and the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced. The temperature of the T51 is accelerated to decrease, and at the same time, the cooling power requirement of the battery is satisfied, and the ambient temperature of the vehicle is balanced.

If Pz+P4>P5, the first compressor and the second compressor are controlled to operate at the maximum cooling power, and the expansion valve opening of the battery cooling circuit in the first compressor refrigeration circuit is controlled to be reduced, and the in-vehicle cooling circuit is controlled. The opening of the expansion valve is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor is controlled to increase, and the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, so that the temperature of the T51 is rapidly decreased while satisfying the battery. Cooling power demand to achieve a balanced internal temperature of the car.

If T51-T52 ≥ Tc and Tc is 3 ° C, the following processing can also be performed: controlling the closing of the battery cooling circuit in the first compressor refrigeration circuit, and controlling the opening of the expansion valve of the cooling circuit in the vehicle to increase, so that the first compressor All cooling power is used for in-vehicle cooling. At the same time, the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor is controlled to increase, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, and the cooling power of the battery is increased, so that the temperature of the T51 is rapidly decreased, and the cooling power of the battery is satisfied. Demand, to achieve a balanced temperature inside the car.

The main difference between Fig. 20 and Fig. 9 is that the addition of a compressor refrigeration circuit is increased, and the temperature regulation between the air outlet of the air conditioner in the vehicle and the power adjustment between the compressors is increased. Only the differences are listed below, and the rest are not to be described.

As shown in Fig. 20, when there are a plurality of batteries, when the temperature adjustment system enters the cooling mode, the controller acquires P1 of each battery 6, the temperature-regulated actual power P2 of each battery, and the maximum cooling power of a single compressor. P, and add P1 of each battery to calculate the total temperature adjustment demand power Pz of the entire temperature regulation system, add the temperature adjustment actual power P2 of each battery to obtain the total temperature adjustment actual power Pf, and compress each The maximum cooling power of the machine is added to calculate the sum of the maximum cooling powers of all the compressors, P5. P51 is the maximum cooling power of the compressor 11, P52 is the maximum cooling power of the compressor 12, and P5 is the sum of the maximum cooling power of all the compressors, P5 = P51 + P52. The temperature adjustment required power of the first battery 61 is P11, and the temperature adjustment required power of the second battery 62 is P12. The temperature adjustment actual power of the first battery 61 is P21, and the temperature adjustment actual power of the second battery 62 is P22.

If Pz ≤ P51, then only one compressor 1 needs to be controlled to provide cooling power, and two compressors 1 can also be controlled to work together. If P51 < Pz ≤ P5, two compressors are required to work together, and the initial cooling power of each compressor may be Pz/2, or other power combinations such that the sum of the cooling powers of the two compressors is Pz. If Pz > P5, two compressors are required to work together, and each compressor operates at maximum cooling power. The temperature regulation required power of the in-vehicle cooling branch is P4, that is, P4 is the power required to adjust the interior temperature to the set temperature.

When the interior cooling and the battery cooling are simultaneously turned on, it is assumed that the temperature of the air outlet 1 and the air outlet 2 is T51, and the temperature of the air outlet 3 and the air outlet 4 is T52.

If T51-T52≥Tc and Tc is 3°C, the following processing is performed: If Pz+P4≤P5, the cooling power of the first compressor 11 is controlled to be increased, or the battery cooling circuit in the refrigeration circuit of the first compressor 11 is controlled. The opening degree of the expansion valve is reduced, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the expansion valve opening of the cooling circuit in the vehicle is controlled. The reduction makes the temperature of T51 decrease rapidly, and at the same time meets the cooling power requirement of the battery to achieve the temperature balance inside the vehicle.

If Pz+P4>P5, controlling the first compressor 11 and the second compressor 12 to operate at the maximum cooling power, while controlling the expansion valve opening degree of the battery cooling circuit in the refrigeration circuit of the first compressor 11 to be reduced, and controlling the vehicle The opening of the expansion valve of the internal cooling circuit is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, so that the temperature of the T51 is rapidly decreased, and at the same time It also meets the cooling power requirements of the battery to achieve a balanced internal temperature of the vehicle.

If T51-T52≥Tc and Tc is 3°C, the following processing may be performed: controlling the closing of the battery cooling circuit in the refrigeration circuit of the first compressor 11, and controlling the opening of the expansion valve of the cooling circuit in the vehicle to increase, so that the first compression All of the cooling power of the machine 11 is used for in-vehicle cooling. At the same time, the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, and the cooling power of the battery is increased, so that the temperature of the T51 is rapidly decreased, and the cooling of the battery is satisfied. Power demand to achieve a balanced environment temperature inside the car.

According to the temperature adjustment method of the vehicle battery according to the embodiment of the present invention, first, respectively, the temperature adjustment required power of the plurality of batteries in the plurality of battery cooling branches is obtained, and then the regional temperature and the air conditioning set temperature of the plurality of regions in the vehicle are respectively obtained, and then according to the temperature. Adjusting the required power, the temperature adjustment actual power, the plurality of zone temperatures, and the air conditioning set temperature adjusts the opening degrees of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and the plurality of cooling branches. Therefore, the method allocates the cooling capacity of each area in the battery and the car according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only when the battery temperature is too high or when the temperature is too low. Adjustments are made to maintain the temperature of the battery within a preset range, and the temperature in each zone of the compartment can be equalized.

When the battery is plural and the plurality of batteries are independently set, as shown in FIG. 24, the temperature regulation system of the vehicle battery includes: a plurality of cooling branches, a plurality of in-vehicle cooling branches, a plurality of battery cooling branches, and a battery temperature adjusting mode. Group 5.

Wherein each refrigeration branch comprises a compressor 1 and a condenser 2 connected to the compressor 1. The plurality of in-vehicle cooling branches are respectively connected to the plurality of cooling branches. The plurality of battery cooling branches are connected to the plurality of cooling branches, and the plurality of battery cooling branches are connected to each other. The battery temperature adjustment module 5 is respectively connected to the plurality of batteries and the plurality of battery cooling branches for acquiring the temperature adjustment required power P1 and the temperature adjustment actual power P2, and acquiring the regional temperature Tq and the air conditioning set temperature Ts of the plurality of regions in the vehicle, and Adjusting the opening degree of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and the plurality of cooling branches according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the complex area temperature Tq, and the air conditioning set temperature Ts, and according to the battery The temperature adjustment demand power P1 and the temperature adjustment actual power P2 adjust the degree of refrigeration opening provided by the complex compressor 1 to the battery cooling branch corresponding to the battery.

Among them, the battery can be a battery pack or a battery module.

Further, according to an embodiment of the present invention, the battery temperature adjustment module 5 adjusts the required power P1, the temperature adjustment actual power P2, the complex region temperature Tq, and the air conditioner set temperature Ts to the plurality of vehicles within the target time t. The opening of the cooling branch, the plurality of battery cooling branches, and the plurality of cooling branches are adjusted to achieve the target temperature.

For example, as shown in FIG. 24, taking the cooling branch, the battery cooling branch, the in-vehicle cooling branch, and the battery as two examples, the batteries are the first battery 61 and the second battery 62, respectively, and the first battery. The 61 and the second battery 62 are disposed independently of each other. The cooling branches are respectively a first cooling branch 11 and a second cooling branch 12, and the battery cooling branches are a first battery cooling branch 401 and a second battery cooling branch 402, respectively, and the in-vehicle cooling branch is respectively the first The in-vehicle cooling branch 301 and the second in-vehicle cooling branch 302.

When the temperature of the first battery 61 and/or the second battery 62 is too high/low, the temperature adjustment of the first battery 61 and/or the second battery 62 is required. The battery temperature adjustment module 5 obtains the temperature adjustment required power P1 and the temperature adjustment actual power P2, adjusts the opening degree of the plurality of battery cooling branches according to P1 and P2 to adjust the cooling power of the battery, and the battery temperature adjustment module 5 acquires the plurality of regions. The temperature Tq and the air conditioner set the temperature Ts, and control the opening degree of each battery cooling branch according to Tq and Ts. For example, if the Tq of a certain area is high and the Tq of the other area is large, the battery temperature adjustment module 5 The opening degree of the in-vehicle cooling branch that controls the cooling of the area is increased, and the opening degree of the corresponding battery cooling branch is controlled to be reduced, and at the same time, to ensure the cooling power of the battery is unchanged, the battery temperature adjusting module 5 controls another The opening of the in-vehicle cooling branch is reduced. Therefore, the system allocates the cooling capacity of the battery and each area in the vehicle according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only when the battery temperature is too high or when the temperature is too low. Adjustments are made to maintain the temperature of the battery within a preset range, and the temperature in each zone of the compartment can be equalized. At the same time, since the plurality of battery cooling branches are connected to each other, the battery temperature adjusting module 5 can ensure the temperature between the batteries by adjusting the cooling capacity of the battery cooling branch corresponding to the battery according to the temperature of each battery. Balance.

It can be understood that the cooling power of the battery temperature regulating module 5 is provided by the vehicle air conditioner, and the cooling capacity is shared with the in-vehicle refrigeration system, thereby reducing the volume of the temperature regulating system and making the distribution of the coolant flow more flexible.

According to an embodiment of the present invention, as shown in FIG. 24, the battery cooling branch may include a heat exchanger 41 including a first pipe and a second pipe, and the second pipe is connected to the battery temperature regulating module 5. The first pipe is in communication with the compressor 1, wherein the first pipe and the second pipe are disposed adjacent to each other independently.

The battery temperature adjustment module 5 includes a flow path (not specifically shown) for adjusting the temperature of the battery, and the flow path is disposed in the battery. A pump 51, a medium container 52, a heater 53, and a controller (not specifically shown) are connected between the flow path and the heat exchanger 41. The controller acquires the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2 of the battery, and adjusts the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2. The in-vehicle cooling branch may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33. The battery cooling branch 4 may also include a second expansion valve 42 and a second electronic valve 43.

As shown in FIG. 24, the first battery cooling branch 401 may further include a first regulating valve 411 and a third regulating valve 413; the second battery cooling branch 402 may further include a second regulating valve 412 and a fourth regulating valve 414. For the connection mode of each regulating valve, refer to FIG. 24, and no further description is made here. As shown in Fig. 24, the amount of refrigeration per compressor 1 can be distributed to the first battery cooling branch 401 or the second battery cooling branch 402 by adjusting the first to fourth regulating valves 411-414. For example, the compressor 1 of the first cooling branch 11 can distribute the refrigerant to the first battery cooling branch 401 through the first regulating valve 411, and distribute the refrigerant to the second battery cooling branch 402 through the second regulating valve 412. The compressor 1 in the second cooling branch 12 can distribute the refrigerant to the first battery cooling branch 401 through the third regulating valve 413, and distribute the refrigerant to the second battery cooling branch 402 through the fourth regulating valve 414.

According to an embodiment of the present invention, as shown in FIG. 24, the battery temperature adjustment module 5 may further include a first temperature sensor 55 disposed at an inlet of the flow path, and a second temperature sense disposed at the outlet of the flow path. A detector 56, and a flow rate sensor 57. It will be appreciated that the inlet and outlet locations of the flow path are not absolute, but are determined based on the steering of the pump 51.

Specifically, the heat exchanger 41 may be a plate heat exchanger, and the plate heat exchanger may be installed inside the vehicle air conditioner, so that the entire refrigerant circuit is inside the vehicle air conditioner, facilitating the commissioning of the vehicle air conditioner, and the vehicle air conditioner can be separately supplied. And assembly, at the same time, the car air conditioner only needs to be refilled once in the installation procedure. The coolant flows into the interior of the battery from the inlet of the flow path and flows out from the outlet of the flow path, thereby achieving heat exchange between the battery and the cooling liquid.

The pump 51 is mainly used to provide power. The medium container 52 is mainly used for storing the coolant and receiving the coolant added to the temperature regulation system. When the coolant in the temperature regulation system is reduced, the coolant in the medium container 52 can be automatically replenished. . The heater 53 can be a PTC heater, can perform CAN communication with the controller, and provides heating power for the temperature regulation system of the vehicle battery, and is controlled by the controller. Moreover, the heater 53 is not directly in contact with the battery 6, and has high safety, reliability, and practicality.

The first temperature sensor 55 is configured to detect the temperature of the coolant at the flow path inlet, and the second temperature sensor 56 is configured to detect the temperature of the coolant at the flow path outlet. The flow rate sensor 57 is used to detect the flow rate information of the coolant in the corresponding pipe. The second electronic valve 43 is used to control the opening and closing of the respective battery cooling branch 4, and the second expansion valve 42 can be used to control the flow of coolant in the responding battery cooling branch 4. The controller can adjust the temperature of the two batteries by adjusting the opening degrees of the first to fourth regulating valves 411-414 while controlling the coolant flow rates of the two cooling branch circuits of the first battery 61 and the second battery 62. At the same time, the controller can also perform CAN communication with the vehicle air conditioner and heater 53, and can control the rotation speed of the pump 51 and monitor the temperature and flow information of the coolant, and can also manage the battery to detect the voltage and temperature information of the battery. The on/off of the temperature regulation system of the vehicle battery is controlled, and the controllers can communicate with each other.

How each battery temperature adjustment module 5 obtains the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the corresponding battery 6 will be described below with reference to specific embodiments.

According to an embodiment of the present invention, the controller may be configured to separately acquire a first parameter when each battery is turned on, and generate a first temperature adjustment required power of each battery according to the first parameter, and acquire each battery separately. a second parameter at the time of temperature adjustment, and generating a second temperature adjustment required power of each battery according to the second parameter, and adjusting the required power according to the first temperature of each battery and the second temperature adjustment required power of each battery The temperature adjustment of each battery requires power P1.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the controller acquires the first between the initial temperature and the target temperature. A temperature difference ΔT ₁ , and generating a first temperature adjustment required power according to the first temperature difference ΔT ₁ and the target time t.

Further, the controller generates the first temperature adjustment required power by the following formula (1): ΔT ₁ *C*M/t (1), where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

The second parameter is the average current I of each battery within a preset time, and the controller generates a second temperature adjustment required power by the following formula (2): I ² *R, (2), where I is the average current, R It is the internal resistance of the battery.

When the battery is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the invention, the controller generates a second of each battery according to an inlet temperature detected by the first temperature sensor 55 of each circuit in which the battery is located and an outlet temperature detected by the second temperature sensor 56, respectively. The temperature difference ΔT ₂ , and the temperature-regulated actual power P2 of each battery is generated according to the second temperature difference ΔT _{2 of} each battery and the flow rate v detected by the flow rate sensor 57.

Further, according to an embodiment of the present invention, the actual power P2 is adjusted according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is in the flow path The specific heat capacity of the coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow path The cross-sectional area.

Specifically, after the vehicle is powered on, the controller determines whether the vehicle needs to perform temperature adjustment. If it is determined that the vehicle needs temperature adjustment, the temperature adjustment function is turned on, and the low speed information is sent to the pump 51, and the pump is driven to a default speed (such as a low speed). start working. Then, the controller acquires an initial temperature (ie, current temperature) of each battery, a target temperature, and a target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t can be preset according to actual conditions, and according to the formula ( 1) Calculate the first temperature regulation required power of each battery. At the same time, the controller obtains the average current I of each battery for a preset time, and calculates the second temperature adjustment required power of each battery according to formula (2). Then, the controller calculates the temperature adjustment required power P1 according to the first temperature adjustment required power and the second temperature adjustment required power of each battery 6 (that is, the required power of the battery is adjusted to the target temperature within the target time). And the controller obtains the temperature information detected by the first temperature sensor 55 and the second temperature sensor 56 corresponding to each battery, and respectively obtains the flow rate information detected by the flow rate sensor 57, according to the formula (3) The temperature adjustment actual power P2 of each battery is calculated separately.

How to adjust the plurality of in-vehicle cooling branches (30 and 30) to the plurality of battery cooling branches (401) according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the complex area temperature Tq, and the air conditioning set temperature Ts will be described below with reference to specific embodiments. And 402) and the opening of the plurality of cooling branches (11 and 12) are adjusted.

According to an embodiment of the present invention, the controller may be configured to generate a total temperature adjustment demand power P _Z according to the temperature adjustment required power P1 of each battery, and determine whether the total temperature adjustment required power P _Z is greater than the total maximum cooling power of the plurality of compressors. P5, wherein, when the total temperature adjustment required power P _{Z is} greater than the total maximum cooling power P5 of the plurality of compressors, the controller adjusts the cooling capacity of the plurality of compressors 1 to the corresponding battery cooling branch 4 of the battery to a maximum; When the total temperature adjustment required power P _{Z is} less than or equal to the total maximum cooling power P5 of the plurality of compressors, the controller adjusts the difference between the required power P _Z and the total maximum cooling power P5 according to the total temperature to the battery cooling branch 4 corresponding to the battery 6 The cooling capacity is adjusted.

Specifically, as shown in FIG. 24, when the battery is cooled, the controller can calculate the total temperature adjustment required power P _Z of the entire temperature adjustment system according to the temperature adjustment required power P1 of each battery, that is, each battery The temperature adjustment demand power P1 is added to obtain the total temperature adjustment demand power P _Z , and the controller calculates the total maximum cooling power P5P5 of the plurality of compressors according to the maximum cooling power P of each compressor 1, that is, each compressor 1 The maximum cooling power P is added to obtain the total maximum cooling power P5P5. Then, the controller determines whether P _Z >P5P5, and if so, the controller controls to adjust the opening degree of each of the second expansion valves 42 to the maximum to increase the flow rate of the coolant flowing into each of the batteries; Allows the battery to cool down within the target time. And if P _Z ≤ P5P5, two compressors are required to work together, and the initial cooling power of each compressor can be Pz/2, or other power combinations, so that the sum of the cooling powers of the two compressors is Pz, and The opening degree of each second expansion valve 42 is adjusted according to the difference between P _Z and P5, wherein the larger the absolute value of the difference between P _Z and P5 is, the smaller the opening degree of the second expansion valve 42 is To achieve the goal of saving energy.

According to an embodiment of the present invention, as shown in FIG. 24, the controller is further configured to detect a temperature of the plurality of batteries, and when the temperature of any one of the plurality of batteries 6 is greater than the first temperature threshold, The temperature control system is controlled to enter a cooling mode, and the temperature adjustment system is controlled to enter the heating mode when the temperature of any of the plurality of batteries is less than the second temperature threshold. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the controller detects the temperature of each battery in real time and makes a judgment. If the temperature of one of the batteries is higher than 40 °C, the temperature of the battery is too high. In order to avoid the influence of high temperature on the performance of the battery, the battery needs to be cooled, and the controller controls the temperature adjustment system to enter the cooling mode. And sending a battery cooling function start information to the air conditioning system, and controlling the corresponding second electronic valve 43 to open, so that the coolant exchanges heat with the battery to lower the temperature of the battery.

If the temperature of a battery is lower than 0 °C, the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, the battery needs to be warmed up, and the controller controls the temperature adjustment system to enter the heating mode. The second electronic valve 43 is controlled to be closed, and the corresponding heater 53 is controlled to be turned on to provide heating power to the temperature adjustment system. When the temperature adjustment system is operating in the heating mode, the heater 53 provides heating power to heat the first battery 61. The flow direction of the coolant in the circuit where the first battery 61 is located is: the medium container 52 - the heat exchanger 41 - heating 53 (open) - pump 51 - first temperature sensor 55 - first battery 61 - second temperature sensor 56 - flow sensor 57 - medium container 52, such loop, to achieve the first battery The temperature of 61 is raised.

According to an embodiment of the present invention, as shown in FIG. 24, when in the cooling mode, the controller is further configured to determine whether the battery temperature is higher when the temperature adjustment required power P1 of the battery cooling branch is greater than the temperature adjustment actual power P2 The third temperature threshold is greater than the third temperature threshold, wherein if the battery temperature is greater than the third temperature threshold, the controller increases the opening degree of the corresponding battery cooling branch, wherein the opening of the battery cooling branch passes through the corresponding valve (ie, the second The expansion valve 42) is separately controlled, and the third temperature threshold is greater than the first temperature threshold, for example, the third temperature threshold may be 45 °C.

Specifically, when in the cooling mode, if P1 is greater than P2, the controller determines whether the temperature of the battery is greater than 45 °C. If the temperature of any of the batteries is greater than 45 ° C, indicating that the current temperature of the battery is too high, the controller reduces the opening degree of the corresponding first expansion valve 32 to reduce the coolant flow rate of the cooling branch in the vehicle and increase the second expansion. The opening of the valve 42 increases the flow of coolant in the battery cooling branch. Thus, by adjusting the cooling capacity distribution of the in-vehicle cooling branch and the battery cooling branch, the temperature adjustment of the battery can be completed within the target time when the battery temperature is too high.

According to an embodiment of the present invention, as shown in FIG. 24, in the cooling mode, the controller is further configured to obtain the temperature adjustment of the battery when the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery. The power difference between the required power P1 and the temperature adjustment actual power P2, and the power of the compressor 1 for cooling the battery is increased according to the power difference, or the coolant flow rate of the loop branch circuit of the battery is increased to increase the battery Cooling power, or adjusting the required power P1 of a battery to be less than or equal to the temperature of the battery, adjusting the actual power P2, reducing the power of the compressor or keeping the power of the compressor constant, or adjusting the loop of the loop of the battery. Coolant flow to reduce battery cooling power.

Specifically, when operating in the cooling mode, if the battery is plural, the controller acquires P1 and P2 of each battery, respectively, and makes a judgment. If the P1 of one of the batteries is greater than P2, it means that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the coolant flow rate, the controller obtains the power difference between P1 and P2 of the battery. And increasing the power of the compressor 1 according to the power difference, or increasing the coolant flow rate of the loop branch circuit of the battery to increase the cooling power of the battery, wherein the power difference between P1 and P2 is larger, the power of the compressor 1 is The more the coolant flow rate of the battery is increased, so that the temperature of the battery is lowered to the target temperature within a preset time t. And if P1 of one of the batteries is less than or equal to P2, the power of the compressor 1 can be kept constant or the power of the compressor 1 can be appropriately reduced, or the coolant flow rate of the loop branch circuit of the battery can be reduced, and the cooling of the battery can be reduced. power. When the temperature of all the batteries is lower than 35 ° C, the battery cooling is completed, and the controller sends information for turning off the temperature adjustment function to the vehicle air conditioner through the CAN communication, and controls the second electronic valve 43 to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery is still higher than 35 ° C, the controller appropriately increases the power of the compressor to complete the cooling of the battery as soon as possible.

According to an embodiment of the present invention, as shown in FIG. 24, the controller is further configured to reduce the plurality of in-vehicle cooling when the temperature of the battery is less than the third temperature threshold and the temperature inside the vehicle is equal to the set temperature Ts of the air conditioner. The opening of the branch and the opening of the cooling branch of the plurality of batteries.

Specifically, when it is in the cooling mode, if the temperature of each battery is less than 45 ° C, the controller determines whether the temperature inside the vehicle reaches the air-conditioning set temperature Ts. If so, the controller reduces the opening degree of the first expansion valve 32 and increases the opening degree of the second expansion valve 42 to increase the coolant flow rate of the battery cooling branch and reduce the coolant of the cooling branch in the vehicle. Flow, complete the battery cooling as soon as possible. On the other hand, if the temperature inside the vehicle does not reach the air-conditioning set temperature Ts, the cooling demand in the vehicle is preferentially satisfied, and the controller increases the opening degree of the first expansion valve 32 and reduces the opening degree of the second expansion valve 42.

In addition, the battery temperature was also processed hierarchically, and the critical values of temperature control were 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery cooling is completed. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature does not exceed 45 ° C, the cooling demand in the vehicle is still prioritized, and if the cooling power in the vehicle is sufficient and reaches equilibrium, the controller increases. The battery cools the opening of the branch to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

In an embodiment of the invention, the plurality of cooling branches respectively correspond to the plurality of air outlets, and the plurality of regional temperatures are the temperatures of the plurality of air outlets.

For example, as shown in Fig. 21, four air outlets, which are an air outlet 1 - an air outlet 4, can be provided in the vehicle compartment. The corresponding zone temperature Tq is detected by detecting the tuyere temperature Tc. It is assumed that the air outlet 1 and the air outlet 2 are supplied with the cooling power by the first cooling branch 11, and the outlet 3 and the outlet 4 are provided with the cooling power by the second cooling branch 12.

According to an embodiment of the present invention, as shown in FIG. 24, the controller is further configured to acquire a temperature difference between the temperature of the plurality of regions, and to cool the air outlet with a high temperature when the temperature difference is greater than the fourth temperature threshold. The opening degree of the in-vehicle cooling branch corresponding to the branch road is increased, and the opening degree of the battery cooling branch corresponding to the cooling branch where the high temperature air outlet is located is lowered. The fourth temperature threshold may be preset according to actual conditions, for example, may be 3 ° C.

Further, according to an embodiment of the present invention, the controller is further configured to reduce the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the low temperature air outlet is located, and correspond to the cooling branch where the low temperature air outlet is located The opening of the battery cooling branch is increased.

Specifically, in the battery cooling process, if the air conditioner needs to be turned on in the vehicle, the ambient temperature in the vehicle compartment needs to be monitored and controlled, so that the ambient temperature throughout the vehicle is balanced, and at the same time, the battery cooling requirement can be met. As shown in FIG. 21, when it is detected that the regional temperature Tq at the air outlet 1 and the air outlet 2 is higher than the temperature Tq of the vicinity of the air outlet 3 and the air outlet 4 by more than 3 ° C, the first in-vehicle cooling branch 301 is controlled. The opening degree of the first expansion valve 32 is increased while controlling the opening degree of the second expansion valve 42 in the first battery cooling branch 401 to decrease, so that the cooling power in the first in-vehicle cooling branch 301 is increased. . The controller also controls the opening degree of the first expansion valve 32 in the second in-vehicle cooling branch 302 to decrease, and the opening degree of the second expansion valve 42 in the second battery cooling branch 402 is increased to make the second car The cooling power in the internal cooling branch 302 is small. Thereby, the cooling power of the first battery cooling 301 and the second battery cooling branch 302 can be made constant, and at the same time, the temperature in the vicinity of the air outlets in the vehicle is equalized. When the vehicle air conditioner detects the air outlet 1, the air temperature Tq near the air outlet 2, the air outlet 3, and the air temperature Tq in the vicinity of the air outlet 4, the controller controls the first interior cooling branch 301 and The first expansion valve 32 in the second in-vehicle cooling branch 302 has the same opening degree to ensure that the cooling powers of the first in-vehicle cooling branch 301 and the second in-vehicle cooling branch 302 are the same.

According to an embodiment of the present invention, when in the heating mode, the controller acquires the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery when the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery. The power difference between the power, and the power of the heater for heating the battery is increased according to the power difference, or the coolant flow rate of the loop branch circuit of the battery is increased to increase the heating power of the battery, and in a certain battery When the temperature adjustment required power P1 is less than or equal to the temperature of the battery to adjust the actual power P2, the power of the heater is reduced or the power of the heater is kept constant, or the coolant flow rate of the loop circuit of the battery is adjusted to reduce the battery flow. heating power.

Specifically, when in the heating mode, the controller acquires P1 and P2 of each battery, respectively, and makes a determination. If P1 of one of the batteries is greater than P2, it means that if the heating of the battery cannot be completed within the target time according to the current heating power or the flow rate of the coolant, the controller obtains the power difference between P1 and P2 of the battery. And increasing the power of the heater 53 for heating the battery according to the power difference, or by adjusting the rotation speed of the corresponding pump 51 to increase the coolant flow rate of the loop branch circuit of the battery, so that the battery can be at the target time. Temperature adjustment is completed within t. Among them, the larger the difference between P1 and P2, the more the power of the heater 53 is increased. If the P1 of a certain battery is less than or equal to P2, the controller can appropriately reduce the power of the heater 53 to save power, or reduce the rotation speed of the corresponding pump 51 to reduce the loop branch circuit of the battery. The coolant flow rate is used to reduce the heating power or to keep the power of the heater 53 constant. When the temperature of all the batteries is higher than the preset temperature, for example, 10 ° C, the battery heating is completed, and the controller sends the information of the temperature adjustment function to the vehicle air conditioner through the CAN communication, and controls the heater 53 to be turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery is still lower than 10 ° C, the controller further increases the power of the heater 53 to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, the controller is further configured to reduce the rotation speed of the pump 51 in the battery flow path when the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, and in a certain battery When the temperature adjustment required power P1 is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump 51 in the battery flow path is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the P1 of a certain battery is less than P2, the controller controls the rotation speed of the corresponding pump 51 to be reduced to save power. If the P1 of a certain battery is greater than P2, the controller controls the power of the corresponding heater 53 or the compressor 1 to increase or the coolant flow rate of the circuit in which the battery is located increases, and also controls the rotation speed of the pump 51 to increase, and the unit can be increased. The quality of the coolant flowing through the cross section of the cooling flow path during the time increases the temperature adjustment actual power P2 of the battery to achieve temperature regulation within the target time t.

It can be understood that when the temperature adjustment system operates in the cooling mode, as shown in FIG. 24, the controller can separately calculate the temperature adjustment required power P1 of the first battery 61 and the second battery 62, and then respectively according to the P1 of each battery. The opening degree of the corresponding second expansion valve 42 is adjusted with the maximum cooling power P of the corresponding compressor. In the cooling process, the controller further adjusts the opening degree of the second expansion valve 42 according to the actual power P2 of each battery. At the same time, the controller adjusts the first battery cooling branch 401 and the second battery cooling branch by adjusting the opening degrees of the first to fourth regulating valves 411-414 according to the temperature condition between the first battery 61 and the second battery 62. The coolant flow rate of the path 402 is distributed so as to control the equalization of the temperatures of the first battery 61 and the second battery 62. Wherein, when the temperature of the first battery 61 is higher than the temperature of the second battery 62 and the difference exceeds the set value, the opening degrees of the first regulating valve 411 and the third regulating valve 413 may be increased, and the second regulating valve 412 and the second regulating valve 412 may be decreased. The opening degree of the fourth regulating valve 414 is to increase the cooling power of the first battery 61; when the temperatures of the first battery 61 and the second battery 62 are equal, the opening degrees of the first to fourth regulating valves 411-414 can be controlled the same. When the temperature adjustment system operates in the heating mode, when the temperature of the first battery 61 is lower than the temperature of the second battery 62 and the difference exceeds the set value, the controller increases the heating of the heater 53 corresponding to the first battery 61. power. Thereby, the temperature balance between the two batteries can be maintained.

In order to make the present invention more clearly understood by those skilled in the art, the working procedure of the temperature regulation system of the vehicle battery will be described below with reference to specific examples.

Fig. 24 shows an increase in the in-vehicle cooling circuit as compared with the temperature adjustment system shown in Figs. 11A to 11B. Only the differences are listed below, and the rest are not to be described.

As shown in Fig. 24, when the battery, the in-vehicle cooling circuit 3, and the battery cooling circuit 4 are plural, and the plurality of batteries are independently set, the controller acquires the P1 of each battery 6 when the temperature adjustment system enters the cooling mode. The temperature of each battery adjusts the actual power P2 and the maximum cooling power P of a single compressor, and adds the P1 of each battery to calculate the total temperature adjustment demand power P _Z of the entire temperature regulation system, which will be used for each battery. The temperature adjustment actual power P2 is added to obtain the total temperature adjustment actual power Pf, and the maximum cooling power of each compressor is added to calculate the sum P5 of the maximum cooling powers of all the compressors. The temperature adjustment required power of the first battery 61 is P11, and the temperature adjustment required power of the second battery 62 is P12. The temperature adjustment actual power of the first battery 61 is P21, and the temperature adjustment actual power of the second battery 62 is P22. P51 is the maximum cooling power of the first compressor 11, and P52 is the maximum cooling power of the second compressor 12.

If Pz ≤ P51, then only one compressor 1 needs to be controlled to provide cooling power, and two compressors 1 can also be controlled to work together. If P51 < Pz ≤ P5, two compressors 1 are required to work together, and the initial cooling power of each compressor is Pz/2, or other power combination, so that the sum of the cooling powers of the two compressors is Pz. If Pz > P5, each compressor operates at maximum cooling power.

When the interior cooling and the battery cooling are simultaneously turned on, if the temperature of the air outlet 1 and the air outlet 2 is T51, and the temperature of the air outlet 3 and the air outlet 4 is T52, the following determination is made:

If T51-T52≥Tc and Tc is 3°C, the following processing is performed: If Pz+P4≤P5, the cooling power of the first compressor 11 is controlled to be increased, or the battery cooling circuit in the refrigeration circuit of the first compressor 11 is controlled. The opening degree of the expansion valve is reduced, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the expansion valve opening of the cooling circuit in the vehicle is controlled. The reduction makes the temperature of T51 decrease rapidly, and at the same time meets the cooling power requirement of the battery to achieve the temperature balance inside the vehicle.

If Pz+P4>P5, controlling the first compressor 11 and the second compressor 12 to operate at the maximum cooling power, while controlling the expansion valve opening degree of the battery cooling circuit in the refrigeration circuit of the first compressor 11 to be reduced, and controlling the vehicle The opening of the expansion valve of the internal cooling circuit is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, and the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, so that the temperature of the T51 is rapidly decreased, and at the same time It also meets the cooling power requirements of the battery to achieve a balanced internal temperature of the vehicle.

If T51-T52≥Tc and Tc is 3°C, the following processing may be performed: controlling the closing of the battery cooling circuit in the refrigeration circuit of the first compressor 11, and controlling the opening of the expansion valve of the cooling circuit in the vehicle to increase, so that the first compression All of the cooling power of the machine 11 is used for in-vehicle cooling. At the same time, the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor 12 is controlled to increase, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, and the cooling power of the battery is increased, so that the temperature of the T51 is rapidly decreased, and the cooling of the battery is satisfied. Power demand to achieve a balanced environment temperature inside the car.

In summary, the temperature adjustment system of the vehicle battery according to the embodiment of the present invention acquires the temperature adjustment required power and the temperature adjustment actual power through the battery temperature adjustment module, and acquires the regional temperature and the air conditioner set temperature of the plurality of regions in the vehicle, and Adjusting the opening degree of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches and the plurality of cooling branches according to the temperature adjustment required power, the temperature adjustment actual power, the plurality of zone temperatures, and the air conditioning set temperature, and adjusting the required power according to the temperature of the battery And the temperature adjustment actual power modulates the degree of cooling provided by the plurality of compressors to the battery cooling branch corresponding to the battery. Therefore, the system allocates the cooling capacity of the battery and each area in the vehicle according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only when the battery temperature is too high or when the temperature is too low. Adjustments are made to maintain the temperature of the battery within a preset range, and the temperature of each zone in the compartment and the temperature between the individual batteries can be equalized.

The temperature regulation system of the vehicle battery includes a plurality of cooling branches and a plurality of battery cooling branches corresponding to the plurality of cooling branches, a plurality of in-vehicle cooling branches, a plurality of batteries, and a plurality of batteries connected between the plurality of batteries and the plurality of battery cooling branches When the battery temperature adjustment module is used, as shown in Fig. 25, the temperature adjustment method of the vehicle battery includes the following steps: S1'''', respectively, obtaining the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the plurality of batteries.

According to an embodiment of the present invention, separately obtaining the temperature adjustment required power of the plurality of batteries specifically includes: acquiring a first parameter when each battery is turned on, and generating a first temperature adjustment required power of each battery according to the first parameter. . A second parameter of each battery during temperature adjustment is separately obtained, and a second temperature adjustment required power of each battery is generated according to the second parameter. The temperature adjustment required power P1 of the battery cooling branch is generated according to the first temperature adjustment required power and the second temperature adjustment required power of each battery.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the first temperature adjustment requirement is generated according to the first parameter. The power specifically includes: acquiring a first temperature difference ΔT ₁ between the initial temperature and the target temperature; generating the first temperature adjustment required power according to the first temperature difference ΔT ₁ and the target time t.

Further, according to an embodiment of the present invention, the first temperature adjustment required power is generated by the following formula (1): ΔT ₁ *C*M/t, (1) where ΔT ₁ is between the initial temperature and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is the average current I of the battery for a preset time, and the second temperature adjustment required power is generated by the following formula (2): I ² *R, (2) where I is the average Current, R is the internal resistance of the battery.

When the battery is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the present invention, acquiring the temperature-regulated actual power P2 of the plurality of batteries specifically includes: obtaining an inlet temperature and an outlet temperature of the flow path for adjusting the temperature of the plurality of batteries, and acquiring a flow velocity v of the coolant inflow path. A second temperature difference ΔT _{2 of the} plurality of batteries is generated based on the flow path inlet temperature and the outlet temperature of the plurality of batteries. The temperature-regulated actual power P2 of the plurality of batteries is generated based on the second temperature difference ΔT _{2 of the} plurality of batteries and the flow rate v.

Further, according to an embodiment of the present invention, the temperature-adjusted actual power P2 is generated according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is the flow path The specific heat capacity of the medium coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, and ρ is the density of the coolant.

S2'''' acquires the area temperature Tq and the air-conditioning set temperature Ts of the plurality of areas in the vehicle, respectively.

S3'''', according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the complex area temperature Tq and the air conditioning set temperature Ts, the opening degrees of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches and the plurality of cooling branches are performed. Adjustment. Wherein, the plurality of battery cooling branches communicate with each other, and the cooling capacity opening degree provided by the plurality of compressors to the battery cooling branch corresponding to the battery is adjusted according to the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2.

Further, according to an embodiment of the present invention, the plurality of in-vehicle cooling branches and the plurality of battery coolings are performed within the target time t according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the plurality of the area temperature Tq, and the air conditioning set temperature Ts. The opening of the branch and the complex cooling branch is adjusted to reach the target temperature.

Among them, the battery can be a battery pack or a battery module. Each battery is set independently of each other.

Specifically, taking the cooling branch, the battery cooling branch, the in-vehicle cooling branch, and the battery as two examples, the batteries are a first battery and a second battery, respectively, and the cooling branches are respectively a first cooling branch and a second The cooling branch circuit and the battery cooling branch are respectively a first battery cooling branch and a second battery cooling branch, and the in-vehicle cooling branch circuit is a first in-vehicle cooling branch and a second in-vehicle cooling branch, respectively.

When the temperature of the first battery and/or the second battery is too high/low, the temperature adjustment of the first battery and/or the second battery is required. Obtaining the temperature adjustment demand power P1 and the temperature adjustment actual power P2, adjusting the opening degree of the plurality of battery cooling branches according to P1 and P2, adjusting the cooling power of the battery, and acquiring the plurality of regional temperature Tq and the air conditioning set temperature Ts, and according to Tq and Ts controls the opening degree of each battery cooling branch. For example, if the Tq of a certain area is higher and the Tq of the other area is larger, the opening degree of the in-vehicle cooling branch that controls the cooling of the area is increased, and the control is controlled. The opening degree of the corresponding battery cooling branch is reduced, and at the same time, in order to ensure that the cooling power of the battery is constant, the opening degree of controlling the cooling branch of the other vehicle is reduced, and the opening degree of the corresponding battery cooling branch is controlled to be increased. . Therefore, the method allocates the cooling capacity of each area in the battery and the car according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only when the battery temperature is too high or when the temperature is too low. Adjustments are made to maintain the temperature of the battery within a preset range, and the temperature in each zone of the compartment can be equalized. At the same time, since the plurality of battery cooling branches are connected to each other, the temperature of each battery can be balanced by adjusting the cooling capacity of the battery cooling branch corresponding to the battery according to the temperature of each battery.

Hereinafter, how to adjust a plurality of in-vehicle cooling branches, a plurality of battery cooling branches, and a plurality of cooling branches according to a temperature adjustment demand power P1, a temperature adjustment actual power P2, a plurality of area temperatures Tq, and an air conditioning set temperature Ts according to specific embodiments will be described. The opening is adjusted.

According to an embodiment of the present invention, when the vehicle battery is plural and independently disposed, and the plurality of in-vehicle cooling branches, the battery cooling branch, and the cooling branch are plural, the temperature adjustment method of the above-mentioned vehicle battery may further include: The temperature regulation demand power P1 of each battery produces a total temperature regulation demand power P _Z . The total maximum cooling power P5 of the plurality of compressors is generated based on the maximum cooling power P of the plurality of compressors. It is judged whether the total temperature adjustment required power P _Z is greater than the total maximum cooling power P5 of the plurality of compressors. If the total temperature adjustment required power P _{Z is} greater than the total maximum cooling power P5 of the plurality of compressors, the cooling capacity of the plurality of compressors to the battery cooling branch corresponding to the battery is adjusted to the maximum. If the total temperature adjustment required power P _{Z is} less than or equal to the total maximum cooling power P5 of the plurality of compressors, the difference between the required power P _Z and the total maximum cooling power P5 is adjusted according to the total temperature to the cooling capacity of the battery cooling branch corresponding to the battery. Degree adjustment.

Specifically, the total temperature adjustment required power P _Z of the entire temperature adjustment system can be calculated according to the temperature adjustment required power P1 of each battery, that is, the temperature adjustment required power P1 of each battery is added to obtain the total temperature adjustment required power P. _Z. At the same time, the total maximum cooling power P5 of the plurality of compressors is calculated according to the maximum cooling power P of each compressor, that is, the maximum cooling power P of each compressor is added to obtain the total maximum cooling power P5. Then, it is judged whether P _Z >P5, and if so, the control adjusts the opening degree of each of the second expansion valves to the maximum to adjust the coolant flow rate of the plurality of compressors to the battery cooling branch corresponding to the battery to the maximum The battery can be cooled down within the target time t. And if P _Z ≤ P5, the opening degree of the second expansion valve is adjusted according to the difference between P _Z and P5, wherein the larger the absolute value of the difference between P _Z and P5 is, the opening degree of the second expansion valve The smaller, the goal of saving energy.

According to an embodiment of the invention, the temperature adjustment method of the battery may further include the step of detecting the temperature of the plurality of batteries. When the temperature of any of the plurality of batteries is greater than the first temperature threshold, the cooling mode is entered. When the temperature of any of the plurality of batteries is less than the second temperature threshold, the heating mode is entered. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the temperature of each battery is instantly detected and judged. If the temperature of one of the batteries is higher than 40 °C, the temperature of the battery is too high. In order to avoid the influence of high temperature on the performance of the battery, the battery needs to be cooled, enters the cooling mode, and sends the battery cooling function. Start the information to the air conditioning system. If the temperature of a battery is lower than 0 °C, the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, the battery needs to be warmed up, enters the heating mode, and controls the corresponding battery cooling. The branch is closed and the heater is turned on to provide heating power to the battery.

According to an embodiment of the present invention, when in the cooling mode, the required power P1, the temperature-adjusted actual power P2, the complex region temperature Tq, and the air-conditioning set temperature Ts are adjusted according to the temperature to the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and The adjustment of the opening degree of the plurality of cooling branches specifically includes: determining whether the battery temperature is greater than a third temperature threshold when the temperature adjustment required power P1 of the battery cooling branch is greater than the temperature adjustment actual power P2, wherein if the battery temperature is greater than the third The temperature threshold value, the controller reduces the opening degree of the plurality of in-vehicle cooling branches, and increases the opening degree of the plurality of battery cooling branches, wherein the opening degree of the plurality of battery cooling branches passes through the corresponding valve (ie, the second expansion valve) Controlled separately, the third temperature threshold is greater than the first temperature threshold, for example, the third temperature threshold may be 45 °C.

Specifically, when in the cooling mode, if P1 is greater than P2, it is determined whether the temperature of the battery is greater than 45 °C. If the temperature of any of the batteries is greater than 45 ° C, the current temperature of the battery is too high, and the opening degree of the first expansion valve 32 is reduced to reduce the coolant flow rate of the cooling branch in the vehicle while increasing the opening of the second expansion valve 42. Degree to increase the coolant flow rate of the battery cooling branch. Thus, by adjusting the cooling capacity distribution of the in-vehicle cooling branch and the battery cooling branch, the temperature adjustment of the battery can be completed within the target time when the battery temperature is too high.

According to an embodiment of the present invention, in the cooling mode, the temperature adjustment method of the battery further includes: determining whether the temperature adjustment required power P1 of each battery is greater than the temperature adjustment actual power P2 corresponding to each battery. If the temperature adjustment required power P1 of a battery is greater than the temperature adjustment actual power P2 of the battery, the power difference between the temperature adjustment required power P1 of the battery and the actual power P2 of the temperature adjustment is obtained, and the battery for the battery is increased according to the power difference. The power of the cooled compressor, or the increase in the coolant flow of the loop circuit of the battery to increase the cooling power of the battery. If the temperature adjustment required power P1 of a battery is less than or equal to the temperature adjustment actual power P2 of the battery, the power of the compressor is reduced or the power of the compressor is kept constant, or the coolant flow rate of the loop branch circuit of the battery is adjusted to be reduced. To reduce the cooling power of the battery.

Specifically, when operating in the cooling mode, if the battery is plural, P1 and P2 of each battery are respectively acquired, and judgment is made. If the P1 of one of the batteries is greater than P2, it means that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and according to The power difference increases the power of the compressor, or increases the coolant flow rate of the loop circuit of the battery to increase the cooling power of the battery, wherein the power difference between P1 and P2 is greater, the power of the compressor and the cooling of the battery The more the liquid flow rate is increased, so that the temperature of the battery is lowered to the target temperature within a preset time t. If P1 of one of the batteries is less than or equal to P2, the power of the compressor can be kept constant or the power of the compressor can be appropriately reduced, or the coolant flow rate of the loop branch circuit of the battery can be reduced, and the cooling power of the battery can be reduced. When the temperature of all the batteries is lower than 35 °C, the battery cooling is completed, the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the second electronic valve is controlled to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery is still higher than 35 ° C, then the power of the compressor is appropriately increased to allow the battery to complete the cooling as soon as possible.

According to an embodiment of the present invention, if the battery temperature is less than the third temperature threshold, it is further determined whether the interior temperature is equal to the air conditioning set temperature Ts; if the interior temperature is equal to the air conditioning set temperature Ts, the plurality of in-vehicle cooling branches are reduced The opening degree and the opening degree of the plurality of battery cooling branches are increased.

Specifically, when it is in the cooling mode, if the temperature of each battery is less than 45 ° C, the controller determines whether the temperature inside the vehicle reaches the air-conditioning set temperature Ts. If it is reached, increase the coolant flow rate of the battery cooling branch, reduce the coolant flow rate of the cooling branch in the vehicle, and complete the cooling of the battery as soon as possible. If the temperature inside the vehicle does not reach the set temperature Ts of the air conditioner, the cooling demand in the vehicle is preferentially satisfied, and the controller increases the coolant flow rate of the cooling branch in the vehicle and reduces the coolant flow rate of the battery cooling branch.

In addition, the battery temperature was also processed hierarchically, and the critical values of temperature control were 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery cooling is completed. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature does not exceed 45 ° C, the cooling demand in the vehicle is still prioritized, and if the cooling power in the vehicle is sufficient and reaches equilibrium, the battery cooling is increased. The opening of the branch to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

According to an embodiment of the invention, reducing the opening degree of the plurality of in-vehicle cooling branches specifically comprises: obtaining a temperature difference between the plurality of zone temperatures. Determine if the temperature difference is greater than the fourth temperature threshold. If the temperature difference is greater than the fourth temperature threshold, the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the high temperature air outlet is located is increased, and the battery corresponding to the cooling branch where the high temperature air outlet is located is cooled. The opening of the branch is reduced. The fourth temperature threshold may be preset according to actual conditions, for example, may be 3 ° C.

Further, according to an embodiment of the present invention, the method for adjusting the temperature of the vehicle battery further includes: reducing the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the low temperature air outlet is located, and placing the air outlet having a low temperature The opening of the battery cooling branch corresponding to the cooling branch is increased.

Specifically, in the battery cooling process, if the air conditioner needs to be turned on in the vehicle, the ambient temperature in the vehicle compartment needs to be monitored and controlled, so that the ambient temperature throughout the vehicle is balanced, and at the same time, the battery cooling requirement can be met. As shown in Fig. 21, when it is detected that the temperature Tq of the air outlet 1 and the air outlet 2 is higher than the temperature Tq of the vicinity of the air outlet 3 and the air outlet 4 by more than 3 ° C, the first in-vehicle cooling branch is increased. The opening degree in the first battery reduces the opening degree in the first battery cooling branch so that the cooling power in the first in-vehicle cooling branch is large. The cold opening in the second in-vehicle cooling branch is also reduced, and the opening of the second battery cooling branch is increased to make the cooling power in the second in-vehicle cooling branch smaller. Thereby, the cooling power of the first battery cooling and the second battery cooling branch can be made constant, and at the same time, the temperature in the vicinity of the air outlets in the vehicle is equalized. When the vehicle air conditioner detects the air temperature at the air outlet 1, the air temperature Tq near the air outlet 2, and the temperature difference Tq in the vicinity of the air outlet 3 and the air outlet 4 are within 3 ° C, the first in-vehicle cooling branch and the second vehicle are controlled. The first expansion valve in the inner cooling branch has the same opening degree to ensure that the cooling power of the first in-vehicle cooling branch and the second in-vehicle cooling branch are the same.

According to an embodiment of the present invention, when in the heating mode, the method further comprises: determining whether the temperature adjustment required power P1 of a certain battery is greater than the temperature adjustment actual power P2 of the battery. If the temperature adjustment required power P1 of a battery is greater than the temperature-adjusted actual power P2 corresponding to the battery, the power difference between the temperature adjustment required power P1 of the battery and the temperature adjustment actual power P2 is obtained, and is increased for cooling according to the power difference. The power of the heater of the battery, or the increase in the coolant flow of the loop circuit of the battery to increase the heating power of the battery. If the temperature adjustment required power P1 of a battery is less than or equal to the temperature-adjusted actual power P2 of the battery, the power of the heater is reduced or the power of the heater is kept constant, or the coolant of the loop branch circuit of the battery is adjusted to be reduced. Flow to reduce the heating power of the battery.

Specifically, when in the heating mode, P1 and P2 of each battery are respectively acquired and judged. If the P1 of one of the batteries is greater than P2, it means that if the heating temperature of the battery cannot be completed within the target time according to the current heating power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and according to The power difference is increased by the power of the heater for heating the battery, or by adjusting the rotation speed of the corresponding pump to increase the coolant flow rate of the loop branch circuit of the battery, so that the battery can complete the temperature within the target time t Adjustment. Among them, the greater the difference between P1 and P2, the more the power of the heater increases. If the P1 of a battery is less than or equal to P2, the power of the heater can be appropriately reduced to save power, or the coolant flow rate of the loop branch circuit of the battery can be reduced by adjusting the rotation speed of the corresponding pump to Reduce the heating power or keep the power of the heater constant. When the temperature of all the batteries is higher than the preset temperature, for example, 10 ° C, the battery is heated, and the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the heater is turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, if the temperature of the battery is lower than 10 ° C, the power of the heater is appropriately increased to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, the temperature adjustment method of the vehicle battery may further include: if the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, reducing the rotation speed of the pump in the flow path of the battery; If the temperature adjustment demand power P1 of a certain battery is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump in the flow path of the battery is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the P1 of a certain battery is less than P2, the rotation speed of the corresponding pump is controlled to be reduced to save power. If the P1 of a certain battery is greater than P2, the controller controls the increase of the power of the corresponding heater or the compressor or the coolant flow of the circuit in which the battery is located, and also controls the rotation speed of the pump to increase the flow per unit time. The temperature of the coolant in the cross section of the cooling passage is increased, thereby increasing the temperature adjustment actual power P2 of the battery to achieve temperature regulation within the target time t.

Fig. 24 shows an increase in the in-vehicle cooling circuit as compared with the temperature adjustment system shown in Figs. 11A to 11B. Only the differences are listed below, and the rest are not to be described.

As shown in Fig. 24, when the battery, the in-vehicle cooling circuit, and the battery cooling circuit are plural, and the plurality of batteries are independently set, when the temperature adjustment system enters the cooling mode, the controller acquires each of the batteries P1 and P1, respectively. The temperature of the battery adjusts the actual power P2 and the maximum cooling power P of the single compressor, and adds the P1 of each battery to calculate the total temperature adjustment demand power P _Z of the entire temperature regulation system, and adjusts the temperature of each battery. The power P2 is added to obtain the total temperature adjustment actual power Pf, and the maximum cooling power of each compressor is added to calculate the sum P5 of the maximum cooling powers of all the compressors. Wherein, the temperature adjustment required power of the first battery is P11, and the temperature adjustment required power of the second battery is P12. The temperature adjustment actual power of the first battery is P21, and the temperature adjustment actual power of the second battery is P22. P51 is the maximum cooling power of the first compressor 11, and P52 is the maximum cooling power of the second compressor.

If Pz ≤ P51, then only one compressor needs to be controlled to provide cooling power, and two compressors can also be controlled to work together. If P51 < Pz ≤ P5, two compressors are required to work together, the initial cooling power of each compressor is Pz/2, or other power combinations such that the sum of the cooling powers of the two compressors is Pz. If Pz > P5, each compressor operates at maximum cooling power.

When the interior cooling and the battery cooling are simultaneously turned on, if the temperature of the air outlet 1 and the air outlet 2 is T51, and the temperature of the air outlet 3 and the air outlet 4 is T52, the following determination is made:

If T51-T52≥Tc and Tc is 3°C, proceed as follows: If Pz+P4≤P5, control the cooling power of the first compressor to increase, or control the expansion valve of the battery cooling circuit in the first compressor refrigeration circuit. The opening degree is reduced, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor is controlled to increase, and the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, thereby making The temperature of T51 is accelerated to decrease, and at the same time, the cooling power requirement of the battery is satisfied, and the ambient temperature of the vehicle is balanced.

If Pz+P4>P5, controlling the first compressor 11 and the second compressor 12 to operate at the maximum cooling power, while controlling the expansion valve opening degree of the battery cooling circuit in the refrigeration circuit of the first compressor 11 to be reduced, and controlling the vehicle The opening of the expansion valve of the internal cooling circuit is increased, or the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor is controlled to increase, and the opening degree of the expansion valve of the cooling circuit in the vehicle is controlled to decrease, so that the temperature of the T51 is rapidly decreased, and at the same time Meet the cooling power requirements of the battery to achieve a balanced environment temperature inside the vehicle.

If T51-T52 ≥ Tc and Tc is 3 ° C, the following processing can also be performed: controlling the closing of the battery cooling circuit in the first compressor refrigeration circuit, and controlling the opening of the expansion valve of the cooling circuit in the vehicle to increase, so that the first compressor All cooling power is used for in-vehicle cooling. At the same time, the expansion valve of the battery cooling circuit in the refrigeration circuit of the second compressor is controlled to increase, the opening degree of the expansion valve for controlling the cooling circuit in the vehicle is reduced, and the cooling power of the battery is increased, so that the temperature of the T51 is rapidly decreased, and the cooling power of the battery is satisfied. Demand, to achieve a balanced temperature inside the car.

According to the temperature adjustment method of the vehicle battery according to the embodiment of the present invention, first, respectively, the temperature adjustment required power and the temperature adjustment actual power of the plurality of batteries are respectively acquired, and then the regional temperature and the air conditioning set temperature of the plurality of regions in the vehicle are separately acquired, and then adjusted according to the temperature. The required power, the temperature-regulated actual power, the plurality of zone temperatures, and the air-conditioning set temperature adjust the opening degrees of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and the plurality of cooling branches. Therefore, the method allocates the cooling capacity of each area in the battery and the car according to the actual state of each battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, not only when the battery temperature is too high or when the temperature is too low. Adjustments are made to maintain the temperature of the battery within a preset range, and the temperature of each zone in the compartment and the temperature between the individual batteries can be equalized.

When the battery is one, and the cooling branch, the in-vehicle cooling branch and the battery cooling branch are plural, the temperature regulation system of the vehicle battery includes: a plurality of cooling branches, a plurality of in-vehicle cooling branches, and a plurality of battery cooling branches. And battery temperature adjustment module 5.

Here, as shown in Fig. 26, each of the cooling branches includes a compressor 1 and a condenser 2 connected to the compressor 1. The plurality of in-vehicle cooling branches are respectively connected to the plurality of cooling branches. The battery temperature adjustment module 5 is connected to the battery 6 and the battery cooling branch for acquiring the temperature adjustment required power P1 and the temperature adjustment actual power P2, and acquiring the regional temperature Tq and the air conditioning set temperature Ts of the plurality of regions in the vehicle, and according to the temperature The required power P1, the temperature-regulated actual power P2, the complex region temperature Tq, and the air-conditioning set temperature Ts are adjusted for the power of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and the plurality of cooling branches.

Among them, the battery can be a battery pack or a battery module.

Further, according to an embodiment of the present invention, the battery temperature adjustment module 5 adjusts the required power P1, the temperature adjustment actual power P2, the complex region temperature Tq, and the air conditioner set temperature Ts to the plurality of vehicles within the target time t. The power of the cooling branch, the plurality of battery cooling branches, and the plurality of cooling branches are adjusted to achieve the target temperature. When the temperature of the battery is too high or too low, the battery needs to be temperature adjusted. The battery temperature adjustment module 5 obtains the temperature adjustment demand power P1 of the battery 6 and the temperature adjustment actual power P2, adjusts the opening degree of the plurality of battery cooling branches according to P1 and P2, to adjust the cooling power of the battery, and the battery temperature adjustment module 5 Obtaining the complex area temperature Tq and the air conditioner set temperature Ts, and controlling the opening degree of each battery cooling branch according to Tq and Ts, for example, if the Tq of a certain area is high and the Tq of the other area is large, the battery temperature is adjusted. The module 5 controls the opening degree of the in-vehicle cooling branch of the cooling area to be increased, and at the same time controls the opening degree of the corresponding battery cooling branch to be reduced, and at the same time, the battery temperature adjusting module 5 is ensured to ensure the cooling power of the battery is unchanged. The opening degree of the cooling branch of the other vehicle is controlled to be reduced, and the opening degree of the corresponding battery cooling branch is controlled to increase. Therefore, the system allocates the cooling capacity of the battery and each area in the vehicle according to the actual state of the battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, and can not only adjust the temperature when the battery temperature is too high or too low. In order to maintain the temperature of the battery within a preset range, it is also possible to equalize the temperature of each area in the compartment.

It can be understood that the cooling power of the battery temperature regulating module 5 is provided by the vehicle air conditioner, and the cooling capacity is shared with the in-vehicle refrigeration system, thereby reducing the volume of the temperature regulating system and making the distribution of the coolant flow more flexible.

According to an embodiment of the invention, the battery cooling branch may include a heat exchanger 41 connected to the battery temperature regulating module 5. The heat exchanger 41 may include a first pipe and a second pipe, the second pipe is connected to the battery temperature regulating module 5, and the first pipe is connected to the compressor 1, wherein the first pipe and the second pipe are adjacent to each other. . The battery temperature adjustment module 5 includes a flow path (not specifically shown) for adjusting the temperature of the battery, and the flow path is disposed in the battery. A pump 51, a medium container 52, a heater 53, and a controller (not specifically shown) are connected between the flow path and the heat exchanger 41. The controller acquires the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2 of the battery, and adjusts the temperature of the battery according to the temperature adjustment required power P1 and the temperature adjustment actual power P2. The in-vehicle cooling branch may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33. The battery cooling branch 4 may also include a second expansion valve 42 and a second electronic valve 43.

Specifically, the heat exchanger 41 may be a plate heat exchanger, and the plate heat exchanger may be installed inside the vehicle air conditioner, so that the entire refrigerant circuit is inside the vehicle air conditioner, facilitating the commissioning of the vehicle air conditioner, and the vehicle air conditioner can be separately supplied. And assembly, at the same time, the car air conditioner only needs to be refilled once in the installation procedure. The coolant flows into the interior of the battery from the inlet of the flow path and flows out from the outlet of the flow path, thereby achieving heat exchange between the battery and the cooling liquid.

The pump 51 is mainly used to provide power. The medium container 52 is mainly used for storing the coolant and receiving the coolant added to the temperature regulation system. When the coolant in the temperature regulation system is reduced, the coolant in the medium container 52 can be automatically replenished. . The heater 53 can be a PTC heater, can perform CAN communication with the controller, and provides heating power for the temperature regulation system of the vehicle battery, and is controlled by the controller. Moreover, the heater 53 is not directly in contact with the battery 6, and has high safety, reliability, and practicality.

The first temperature sensor 55 is configured to detect the temperature of the coolant at the flow path inlet, and the second temperature sensor 56 is configured to detect the temperature of the coolant at the flow path outlet. The flow rate sensor 57 is used to detect the flow rate information of the coolant in the corresponding pipe. The second electronic valve 43 is used to control the opening and closing of the respective battery cooling branch, and the second expansion valve 42 can be used to control the flow of coolant in the responding battery cooling branch.

How to obtain the temperature adjustment required power P1 and the temperature adjustment actual power P2 will be described below in conjunction with specific embodiments.

According to an embodiment of the present invention, the controller may be configured to respectively acquire a first parameter when the battery is turned on, and generate a first temperature adjustment required power of the battery according to the first parameter, and obtain a first time when the battery is adjusted in temperature. The second parameter generates a second temperature adjustment required power of the battery according to the second parameter, and generates a temperature adjustment required power P1 of the battery according to the first temperature adjustment required power of the battery and the second temperature adjustment required power of the battery.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the controller acquires the first between the initial temperature and the target temperature. A temperature difference ΔT ₁ , and generating a first temperature adjustment required power according to the first temperature difference ΔT ₁ and the target time t.

Further, the controller generates the first temperature adjustment required power by the following formula (1): ΔT ₁ *C*M/t (1), where ΔT ₁ is the first temperature difference between the initial temperature and the target temperature, t is the target time, C is the specific heat capacity of the battery 6, and M is the quality of the battery.

The second parameter is the average current I of the battery within a preset time, and the controller generates the second temperature adjustment required power by the following formula (2): I ² *R, (2), where I is the average current and R is the battery 6 internal resistance.

When the battery 6 is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery 6 is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the present invention, the controller generates a second temperature difference ΔT _{2 of the} battery according to the inlet temperature detected by the first temperature sensor 55 and the outlet temperature detected by the second temperature sensor 56, respectively, according to the battery. The second temperature difference ΔT ₂ and the flow rate v detected by the flow rate sensor 57 generate the temperature-regulated actual power P2 of the battery.

Further, according to an embodiment of the present invention, the actual power P2 is adjusted according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is in the flow path The specific heat capacity of the coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, and ρ is the density of the coolant.

Specifically, as shown in FIG. 26, after the vehicle is powered on, the controller determines whether the battery 6 needs to be temperature-regulated. If it is determined that the battery 6 requires temperature adjustment, the temperature adjustment function is turned on, and the low-speed information is sent to the pump 51. Pu starts working at the default speed (such as low speed). The controller can obtain the initial temperature (ie, the current temperature) of the 6 battery, the target temperature, and the target time t from the initial temperature to the target temperature, wherein the target temperature and the target time t can be preset according to actual conditions, and according to formula (1) Calculate the first temperature regulation required power of the 6 battery. At the same time, the controller acquires the average current I of the battery 6 for a preset time, and calculates the second temperature adjustment required power of the battery 6 according to the formula (2). Then, the controller calculates the temperature adjustment required power P1 according to the first temperature adjustment required power of the battery and the second temperature adjustment required power, respectively. Moreover, the controller acquires the first temperature sensor 55 and the second temperature sensor 56 to detect the temperature information, and separately obtains the flow rate information detected by the flow rate sensor, and calculates the actual temperature adjustment of the battery according to the formula (3). Power P2.

How to adjust the plurality of in-vehicle cooling branches (30 and 30) to the plurality of battery cooling branches (401) according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the complex area temperature Tq, and the air conditioning set temperature Ts will be described below with reference to specific embodiments. And 402) and the opening of the plurality of cooling branches (11 and 12) are adjusted.

According to an embodiment of the invention, the controller is further configured to generate a total maximum cooling power P5 of the plurality of compressors according to a maximum cooling power P of the plurality of compressors, and determine whether the temperature adjustment required power P1 is greater than a total of the plurality of compressors The maximum cooling power P5, wherein when the temperature adjustment required power P1 is greater than the total maximum cooling power P5 of the plurality of compressors, the controller adjusts the cooling capacity opening of the plurality of battery cooling branches to a maximum; when the temperature adjustment required power P1 is less than or When the total cooling power P5 of the plurality of compressors is equal to the total cooling power P5 of the plurality of compressors, the controller adjusts the cooling capacity of the battery cooling branch according to the difference between the required power P1 and the total maximum cooling power P5.

Specifically, as shown in FIG. 26, the controller can calculate the total maximum cooling power P5 of the plurality of compressors according to the maximum cooling power P of each compressor, that is, add the maximum cooling power P of each compressor to obtain The total maximum cooling power is P5. Then, the controller determines whether P1>P5, and if so, the controller adjusts the opening degree of each of the second expansion valves 42 to the maximum to adjust the coolant flow rate of the plurality of compressors 1 to the battery cooling branch corresponding to the battery. To the maximum, so that the battery 6 can complete the cooling within the target time t. And if P1 ≤ P5, the controller adjusts the opening degree of the second expansion valve 42 according to the difference between P1 and P5, wherein the larger the absolute value of the difference between P1 and P5, the opening of the second expansion valve 42 The smaller the degree, the more energy-saving.

According to an embodiment of the invention, the controller is further configured to detect a temperature of the battery, and when the temperature of the battery is greater than the first temperature threshold, control the temperature adjustment system to enter the cooling mode, and the temperature of the battery is less than the second temperature At the critical value, the temperature control system is controlled to enter the heating mode. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the controller instantly detects the temperature of the battery and makes a judgment. If the temperature of the battery is higher than 40 ° C, indicating that the temperature of the battery 6 is too high, in order to avoid the impact of the high temperature on the performance of the battery 6, the battery 6 needs to be cooled, and the controller controls the temperature adjustment system to enter the cooling mode. And sending a battery cooling function start information to the air conditioning system, and controlling the second electronic valve 43 to open, so that the coolant exchanges heat with the battery to lower the temperature of the battery.

If the temperature of the battery is lower than 0 ° C, the temperature of the battery 6 is too low. In order to avoid the influence of low temperature on the performance of the battery, the battery 6 needs to be heated, and the controller controls the temperature adjustment system to enter the heating mode. The second electronic valve 43 is controlled to be closed, and the heater 53 is controlled to be turned on to provide heating power to the temperature adjustment system.

According to an embodiment of the present invention, when in the cooling mode, the controller is further configured to determine whether the battery temperature is greater than a third temperature threshold when the temperature adjustment required power P1 of the battery cooling branch is greater than the temperature adjustment actual power P2. Wherein, if the battery temperature is greater than the third temperature threshold, the controller reduces the opening degree of the plurality of in-vehicle cooling branches and increases the opening degree of the plurality of battery cooling branches, wherein the opening degree of the battery cooling branch passes through the corresponding valve (ie, the second expansion valve 42) is respectively controlled, the third temperature threshold is greater than the first temperature threshold, for example, the third temperature threshold may be 45 °C.

Specifically, when in the cooling mode, if P1 is greater than P2, the controller determines whether the temperature of the battery is greater than 45 °C. If the temperature of the battery is greater than 45 ° C, indicating that the temperature of the current battery 6 is too high, the controller reduces the opening degree of the first expansion valve 32 to reduce the coolant flow rate of the cooling branch in the vehicle while increasing the second expansion valve 42 Opening to increase the coolant flow rate of the battery cooling branch. Thus, by adjusting the cooling capacity distribution of the in-vehicle cooling branch and the battery cooling branch, the temperature adjustment of the battery can be completed within the target time when the battery temperature is too high.

According to an embodiment of the present invention, in the cooling mode, the controller is further configured to acquire the temperature adjustment required power P1 and the temperature adjustment actual power P2 of the battery when the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery. The power difference between them, and increase the power of the compressor 1 for cooling the battery according to the power difference, or adjust the coolant flow rate of the loop branch circuit of the battery to increase the cooling power of the battery, or adjust the temperature of the battery The required power P1 is less than or equal to the temperature of the battery to adjust the actual power P2, reduce the power of the compressor or keep the power of the compressor constant, or adjust the coolant flow rate of the loop branch circuit of the battery to reduce the cooling power of the battery.

Specifically, when operating in the cooling mode, the controller acquires P1 and P2 of the battery 6, and makes a judgment. If P1 is greater than P2, it means that if the cooling of the battery 6 cannot be completed within the target time according to the current cooling power or the coolant flow rate, the controller acquires the power difference between P1 and P2 of the battery 6, and increases according to the power difference. The power of the compressor 1, or the coolant flow rate of the loop branch circuit of the battery, to increase the cooling power of the battery, wherein the power difference between P1 and P2 is larger, the power of the compressor and the coolant flow rate of the battery The more the increase, the temperature of the battery is lowered to the target temperature within the preset time t. If the P1 of the battery 6 is less than or equal to P2, the power of the compressor can be kept constant or the power of the compressor can be appropriately reduced, or the coolant flow rate of the loop branch circuit of the battery can be reduced, and the cooling power of the battery can be reduced. When the temperature of the battery is lower than 35 ° C, the battery cooling is completed, and the controller sends information for turning off the temperature adjustment function to the vehicle air conditioner through the CAN communication, and controls the second electronic valve 43 to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, the temperature of the battery is still higher than 35 ° C, the controller further increases the power of the compressor so that the battery 6 completes the cooling as soon as possible.

According to an embodiment of the present invention, the controller is further configured to reduce the opening degree of the plurality of in-vehicle cooling branches and increase the plural when the temperature of the battery is less than the third temperature threshold and the interior temperature is equal to the air conditioning set temperature Ts The opening of the battery cooling branch.

Specifically, when it is in the cooling mode, if the temperature of the battery is less than 45 ° C, the controller determines whether the temperature inside the vehicle reaches the air-conditioning set temperature Ts. If so, the controller reduces the opening degree of the first expansion valve 32 and increases the opening degree of the second expansion valve 42 to increase the coolant flow rate of the battery cooling branch and reduce the coolant of the cooling branch in the vehicle. Flow, complete the battery cooling as soon as possible. On the other hand, if the temperature inside the vehicle does not reach the air-conditioning set temperature Ts, the cooling demand in the vehicle is preferentially satisfied, and the controller increases the opening degree of the first expansion valve 32 and reduces the opening degree of the second expansion valve 42.

In addition, the battery temperature was also processed hierarchically, and the critical values of temperature control were 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery cooling is completed. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature does not exceed 45 ° C, the cooling demand in the vehicle is still prioritized, and if the cooling power in the vehicle is sufficient and reaches equilibrium, the controller increases. The battery cools the opening of the branch to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

In an embodiment of the invention, the plurality of cooling branches respectively correspond to the plurality of air outlets, and the plurality of regional temperatures are the temperatures of the plurality of air outlets.

For example, as shown in Fig. 21, four air outlets, which are an air outlet 1 - an air outlet 4, can be provided in the vehicle compartment. The corresponding zone temperature Tq is detected by detecting the tuyere temperature Tc. It is assumed that the air outlet 1 and the air outlet 2 are supplied with the cooling power by the first cooling branch 11, and the outlet 3 and the outlet 4 are provided with the cooling power by the second cooling branch 12.

According to an embodiment of the invention, the controller is further configured to obtain a temperature difference between the plurality of regional temperatures, and when the temperature difference is greater than the fourth temperature threshold, the in-vehicle cooling corresponding to the cooling branch where the high temperature air outlet is located The opening degree of the branch road is increased, and the opening degree of the battery cooling branch corresponding to the cooling branch where the high temperature air outlet is located is lowered. The fourth temperature threshold may be preset according to actual conditions, for example, may be 3 ° C.

Further, according to an embodiment of the present invention, the controller is further configured to reduce the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the low temperature air outlet is located, and correspond to the cooling branch where the low temperature air outlet is located The opening of the battery cooling branch is increased.

Specifically, in the battery cooling process, if the air conditioner needs to be turned on in the vehicle, the ambient temperature in the vehicle compartment needs to be monitored and controlled, so that the ambient temperature throughout the vehicle is balanced, and at the same time, the battery cooling requirement can be met. As shown in FIG. 21, when it is detected that the regional temperature Tq at the air outlet 1 and the air outlet 2 is higher than the temperature Tq of the vicinity of the air outlet 3 and the air outlet 4 by more than 3 ° C, the first in-vehicle cooling branch 301 is controlled. The opening degree of the first expansion valve 32 is increased while controlling the opening degree of the second expansion valve 42 in the first battery cooling branch 401 to decrease, so that the cooling power in the first in-vehicle cooling branch 301 is increased. . The controller also controls the opening degree of the first expansion valve 32 in the second in-vehicle cooling branch 302 to decrease, and the opening degree of the second expansion valve 42 in the second battery cooling branch 402 is increased to make the second car The cooling power in the internal cooling branch 302 is small. Thereby, the cooling power of the first battery cooling 301 and the second battery cooling branch 302 can be made constant, and at the same time, the temperature in the vicinity of the air outlets in the vehicle is equalized. When the vehicle air conditioner detects the air outlet 1, the air temperature Tq near the air outlet 2, the air outlet 3, and the air temperature Tq in the vicinity of the air outlet 4, the controller controls the first interior cooling branch 301 and The first expansion valve 32 in the second in-vehicle cooling branch 302 has the same opening degree to ensure that the cooling powers of the first in-vehicle cooling branch 301 and the second in-vehicle cooling branch 302 are the same.

According to an embodiment of the present invention, when in the heating mode, the controller obtains between the temperature adjustment required power P1 of the battery and the actual power P2 of the temperature adjustment when the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery. The power difference is increased, and the power of the heater 53 for heating the battery is increased according to the power difference, or the coolant flow rate of the loop branch circuit of the battery is increased to increase the heating power of the battery, and the required power P1 is adjusted at the temperature of the battery. When the actual power P2 is less than or equal to the temperature of the battery, the power of the heater 53 is reduced or the power of the heater 53 is kept constant, or the coolant flow rate of the loop branch circuit of the battery is adjusted to reduce the heating power of the battery.

Specifically, when in the heating mode, the controller acquires P1 and P2 of the battery 6, and makes a judgment. If P1 is greater than P2, it means that if the heating of the battery 6 cannot be completed within the target time according to the current heating power or the coolant flow rate, the controller acquires the power difference between P1 and P2 of the battery 6, and increases according to the power difference. The power for heating the heater 53 of the battery 6, or by adjusting the rotational speed of the pump 51, increases the flow rate of the coolant in the loop branch circuit of the battery so that the battery can complete the temperature adjustment within the target time t. Among them, the larger the difference between P1 and P2, the more the power of the heater 53 is increased. If the P1 of the battery 6 is less than or equal to P2, the controller can appropriately reduce the power of the heater 53 to save power, or reduce the coolant flow of the loop branch circuit of the battery 6 by adjusting the rotation speed of the pump 51. To reduce the heating power, or to keep the power of the heater 53 unchanged. When the temperature of the battery is higher than the preset temperature, for example, 10 ° C, the battery 6 is heated, and the controller sends the information of the temperature adjustment function to the vehicle air conditioner through the CAN communication, and controls the heater 53 to be turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, the temperature of the battery 6 is still lower than 10 ° C, the controller further increases the power of the heater 53 to cause the battery 6 to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, the controller is further configured to reduce the rotation speed of the pump 51 when the temperature adjustment required power P1 of a certain battery is less than the corresponding temperature adjustment actual power P2, and adjust the temperature requirement of a certain battery. When the power P1 is greater than the corresponding temperature adjustment actual power P2, the rotation speed of the pump 51 is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if P1 of the battery 6 is less than P2, the controller controls the rotation speed of the pump 51 to be lowered to save electric energy. If the P1 of the battery 6 is greater than P2, the controller controls the increase of the power of the corresponding heater 53 or the compressor 1 or the coolant flow rate of the circuit in which the battery 6 is located, and also controls the increase of the rotational speed of the pump 51, which can increase the unit time. The quality of the coolant flowing through the cross section of the cooling flow path increases the temperature adjustment actual power P2 of the battery 6 to achieve temperature regulation within the target time t.

It can be understood that the adjustment mode of the battery temperature adjustment module 5 of the system shown in FIG. 26 is similar to that of FIGS. 19A to 19B, and the difference is a single battery pack of FIG. 26, and FIGS. 19A to 19B are two. The battery packs are connected in series. For details of the temperature adjustment procedure of the system shown in FIG. 26 in the embodiment of the present invention, reference may be made to the above embodiments. To avoid redundancy, details are not described herein again.

According to the temperature regulation system of the vehicle battery according to the embodiment of the invention, the temperature adjustment required power and the temperature adjustment actual power are obtained by the battery temperature adjustment module, and the regional temperature and the air conditioner set temperature of the plurality of regions in the vehicle are obtained, and the required power is adjusted according to the temperature. The temperature adjustment actual power, the plurality of zone temperatures, and the air conditioning set temperature adjust the opening degrees of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and the plurality of cooling branches. Therefore, the system allocates the cooling capacity of the battery and each area in the vehicle according to the actual state of the battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, and can not only adjust the temperature when the battery temperature is too high or too low. In order to maintain the temperature of the battery within a preset range, it is also possible to equalize the temperature of each area in the compartment.

Figure 27 is a flow chart showing a temperature adjustment method of a vehicle battery according to an eleventh embodiment of the present invention. Wherein, as shown in FIG. 26, the temperature regulation system of the vehicle battery includes a plurality of cooling branches and a plurality of battery cooling branches corresponding to the plurality of cooling branches, a plurality of in-vehicle cooling branches, a battery, and a battery and a plurality of batteries connected thereto a battery temperature adjustment module between the cooling branches, each battery cooling branch includes a heat exchanger; as shown in Fig. 27, the temperature adjustment method comprises the following steps: S1 ''''', respectively, obtaining the battery The temperature adjustment requires power P1 and the temperature adjustment actual power P2.

According to an embodiment of the present invention, acquiring the temperature adjustment required power of the battery specifically includes: obtaining a first parameter when the battery is turned on, and generating a first temperature adjustment required power of the battery according to the first parameter. Obtaining a second parameter of the battery during temperature adjustment, and generating a second temperature adjustment required power of the battery according to the second parameter. The temperature adjustment required power P1 of the battery cooling branch is generated according to the first temperature adjustment required power and the second temperature adjustment required power.

Further, according to an embodiment of the present invention, the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time t from the initial temperature to the target temperature, and the first temperature adjustment requirement is generated according to the first parameter. The power specifically includes: acquiring a first temperature difference ΔT ₁ between the initial temperature and the target temperature; generating the first temperature adjustment required power according to the first temperature difference ΔT ₁ and the target time t.

Further, according to an embodiment of the present invention, the first temperature adjustment required power is generated by the following formula (1): ΔT ₁ *C*M/t, (1) where ΔT ₁ is between the initial temperature and the target temperature The first temperature difference, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery.

According to an embodiment of the invention, the second parameter is the average current I of the battery for a preset time, and the second temperature adjustment required power is generated by the following formula (2): I ² *R, (2) where I is the average Current, R is the internal resistance of the battery.

When the battery is cooled, P1 = ΔT ₁ * C * M / t + I ² * R; when the battery is heated, P1 = ΔT ₁ * C * M / tI ² * R.

According to an embodiment of the present invention, acquiring the temperature-regulating actual power P2 of the battery specifically includes: obtaining an inlet temperature and an outlet temperature of a flow path for adjusting the temperature of the battery, and acquiring a flow velocity v of the coolant flowing into the flow path. A second temperature difference ΔT _{2 of the} battery is generated based on the flow path inlet temperature and the outlet temperature of the battery. The actual temperature P2 of the temperature of the battery is generated based on the second temperature difference ΔT _{2 of the} battery and the flow rate v.

Further, according to an embodiment of the present invention, the actual power P2 is adjusted according to the following formula (3): ΔT ₂ *c*m, (3) where ΔT ₂ is the second temperature difference and c is in the flow path The specific heat capacity of the coolant, m is the mass of the coolant flowing through the cross section of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is the density of the coolant, and s is the flow path The cross-sectional area.

S2''''', respectively, acquires the area temperature Tq and the air-conditioning set temperature Ts of the plurality of areas in the vehicle.

S3''''', according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the complex area temperature Tq and the air conditioning set temperature Ts to the opening of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches and the plurality of cooling branches Make adjustments.

Further, according to an embodiment of the present invention, the plurality of in-vehicle cooling branches and the plurality of battery coolings are performed within the target time t according to the temperature adjustment required power P1, the temperature adjustment actual power P2, the plurality of the area temperature Tq, and the air conditioning set temperature Ts. The opening of the branch and the complex cooling branch is adjusted to reach the target temperature.

Among them, the battery can be a battery pack or a battery module.

Specifically, taking the cooling branch, the battery cooling branch, the in-vehicle cooling branch, and the battery as two examples, the cooling branch is a first cooling branch and a second cooling branch, respectively, and the battery cooling branch is respectively A battery cooling branch and a second battery cooling branch, the in-vehicle cooling branch circuit are a first in-vehicle cooling branch and a second in-vehicle cooling branch, respectively.

When the temperature of the battery is too high or too low, the battery needs to be temperature adjusted. Electrically obtaining the temperature adjustment demand power P1 of the battery and the temperature adjustment actual power P2, adjusting the opening degree of the plurality of battery cooling branches according to P1 and P2, adjusting the cooling power of the battery, and acquiring the plurality of regional temperature Tq and the air conditioning set temperature Ts, and Controlling the opening degree of each battery cooling branch according to Tq and Ts, for example, if the Tq of a certain area is higher and the Tq of the other area is larger, the opening degree of the in-vehicle cooling branch that controls cooling of the area is increased. At the same time, the opening degree of the corresponding battery cooling branch is controlled to be reduced, and at the same time, in order to ensure that the cooling power of the battery is constant, the opening degree of the cooling branch of the other vehicle is controlled to be reduced, and the corresponding cooling branch of the battery is controlled. The degree increases. Therefore, the method allocates the cooling capacity of the battery and each area in the vehicle according to the actual state of the battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, and can not only adjust the temperature when the battery temperature is too high or too low. In order to maintain the temperature of the battery within a preset range, it is also possible to equalize the temperature of each area in the compartment.

Based on Fig. 26, how to adjust the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and the plurality of in-vehicle cooling branches and the air conditioning set temperature Ts according to the temperature adjustment demand power P1, the temperature adjustment actual power P2, the complex area temperature Tq, and the air conditioning set temperature Ts will be described below with reference to the specific embodiments. The opening of the plurality of cooling branches is adjusted.

According to an embodiment of the present invention, when the vehicle battery is one, and the in-vehicle cooling branch, the battery cooling branch, and the cooling branch are plural, the above-described method for adjusting the temperature of the vehicle battery may further include: according to the plurality of compressors The maximum cooling power P produces the total maximum cooling power P5 of the complex compressor. It is judged whether the temperature adjustment required power P1 is greater than the total maximum cooling power P5 of the plurality of compressors. If the temperature adjustment required power P1 is greater than the total maximum cooling power P5 of the plurality of compressors, the cooling capacity of the plurality of compressors to the battery cooling branch is adjusted to a maximum. If the temperature adjustment required power P1 is less than or equal to the total maximum cooling power P5 of the plurality of compressors, the cooling capacity opening of the battery cooling branch corresponding to the battery is adjusted according to the difference between the temperature adjustment required power P1 and the total maximum cooling power P5.

Specifically, the total maximum cooling power P5 of the plurality of compressors can be calculated according to the maximum cooling power P of each compressor, that is, the maximum cooling power P of each compressor is added to obtain the total maximum cooling power P5. Then, it is judged whether P1>P5, and if so, the opening degree of the second expansion valve in each battery cooling branch is adjusted to the maximum to adjust the coolant flow rate of the plurality of compressors to the battery cooling branch corresponding to the battery to Maximum, so that the battery can complete the cooling within the target time t. And if P1 ≤ P5, the opening degree of the second expansion valve in the battery cooling branch is adjusted according to the difference between P1 and P5, wherein the larger the absolute value of the difference between P1 and P5, the second expansion valve The smaller the opening, the purpose of saving energy.

According to an embodiment of the present invention, the temperature adjustment method of the battery may further include the step of detecting the temperature of the battery. When the temperature of the battery is greater than the first temperature threshold, the cooling mode is entered. When the temperature of the battery is less than the second temperature threshold, the heating mode is entered. The first temperature threshold and the second temperature threshold may be preset according to actual conditions. For example, the first temperature threshold may be 40 ° C, and the second temperature threshold may be 0 ° C.

Specifically, after the vehicle is powered on, the temperature of the battery is instantly detected and judged. If the temperature of the battery is higher than 40 °C, the temperature of the battery is too high. In order to avoid the impact of high temperature on the performance of the battery, the battery needs to be cooled down, enter the cooling mode, and send the battery cooling function to the air conditioning system. If the temperature of the battery is lower than 0 °C, the temperature of the battery is too low. In order to avoid the influence of low temperature on the performance of the battery, it is necessary to heat up the battery, enter the heating mode, control the cooling branch of the battery to turn off, and control the heating. The unit is turned on to provide heating power to the battery.

According to an embodiment of the present invention, when in the cooling mode, the required power P1, the temperature-adjusted actual power P2, the complex region temperature Tq, and the air-conditioning set temperature Ts are adjusted according to the temperature to the plurality of in-vehicle cooling branches, the plurality of battery cooling branches, and The adjustment of the opening degree of the plurality of cooling branches specifically includes: determining whether the battery temperature is greater than a third temperature threshold when the temperature adjustment required power P1 of the battery cooling branch is greater than the temperature adjustment actual power P2, wherein if the battery temperature is greater than the third The temperature threshold value reduces the opening degree of the plurality of in-vehicle cooling branches and increases the opening degree of the plurality of battery cooling branches, wherein the opening degree of the plurality of battery cooling branches is respectively controlled by the corresponding valve (ie, the second expansion valve) The third temperature threshold is greater than the first temperature threshold, for example, the third temperature threshold may be 45 °C.

Specifically, when in the cooling mode, if P1 is greater than P2, it is determined whether the temperature of the battery is greater than 45 °C. If the temperature of the battery is greater than 45 ° C, the current temperature of the battery is too high, and the opening degree of the first expansion valve is reduced to reduce the coolant flow rate of the cooling branch in the vehicle, and increase the opening degree of the second expansion valve 42 to Increase the coolant flow rate of the battery cooling branch. Thus, by adjusting the cooling capacity distribution of the in-vehicle cooling branch and the battery cooling branch, the temperature adjustment of the battery can be completed within the target time when the battery temperature is too high.

According to an embodiment of the present invention, the temperature adjustment method of the battery further includes: determining whether the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2. If the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2 of the battery, the power difference between the temperature adjustment required power P1 of the battery and the actual power P2 of the temperature adjustment is obtained, and the cooling for the battery is increased according to the power difference. The power of the compressor, or the increase in the coolant flow of the loop circuit of the battery to increase the cooling power of the battery. If the temperature adjustment demand power P1 of the battery is less than or equal to the temperature adjustment actual power P2 of the battery, reduce the power of the compressor or keep the power of the compressor unchanged, or adjust the coolant flow rate of the loop branch circuit of the battery to Reduce the cooling power of the battery.

Specifically, when operating in the cooling mode, the batteries P1 and P2 are respectively taken and judged. If P1 is greater than P2, it means that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and the compressor is increased according to the power difference. Power, or increase the coolant flow rate of the loop circuit of the battery to increase the cooling power of the battery, wherein the greater the power difference between P1 and P2, the more the compressor power and the coolant flow rate of the battery increase, So that the temperature of the battery is lowered to the target temperature within the preset time t. If the P1 of the battery is less than or equal to P2, the power of the compressor can be kept constant or the power of the compressor can be appropriately reduced, or the coolant flow rate of the loop branch circuit of the battery can be reduced, and the cooling power of the battery can be reduced. When the temperature of the battery is lower than 35 °C, the battery cooling is completed, the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the second electronic valve is controlled to be closed. If the temperature adjustment system enters the cooling mode for a long time, for example, after 1 hour, if the temperature of the battery is still higher than 35 ° C, then the power of the compressor is appropriately increased to allow the battery to complete the cooling as soon as possible.

According to an embodiment of the present invention, if the battery temperature is less than the third temperature threshold, it is further determined whether the interior temperature is equal to the air conditioning set temperature Ts; if the interior temperature is equal to the air conditioning set temperature Ts, the plurality of in-vehicle cooling branches are reduced The opening degree and the opening degree of the plurality of battery cooling branches are increased.

Specifically, when it is in the cooling mode, if the temperature of the battery is less than 45 ° C, the controller determines whether the temperature inside the vehicle reaches the air-conditioning set temperature Ts. If it is reached, increase the coolant flow rate of the battery cooling branch, reduce the coolant flow rate of the cooling branch in the vehicle, and complete the cooling of the battery as soon as possible. If the temperature inside the vehicle does not reach the set temperature Ts of the air conditioner, the cooling demand in the vehicle is preferentially satisfied, and the controller increases the coolant flow rate of the cooling branch in the vehicle and reduces the coolant flow rate of the battery cooling branch.

In addition, the battery temperature was processed hierarchically, and the critical values of temperature control were 40 ° C, 45 ° C and 35 ° C, respectively. When the battery temperature is higher than 40 ° C, the battery cooling function is activated, and when the battery temperature is lowered to 35 ° C, the battery cooling is completed. When the battery temperature reaches 45 ° C, the battery cooling needs are preferentially met. In addition, when the temperature adjustment demand power P1 is greater than the temperature adjustment actual power P2, if the battery temperature does not exceed 45 ° C, the cooling demand in the vehicle is still prioritized, and if the cooling power in the vehicle is sufficient and reaches equilibrium, the battery cooling is increased. The opening of the branch to increase the cooling power of the battery. If the temperature adjustment demand power P1 is less than or equal to the temperature adjustment actual power P2, the in-vehicle refrigeration demand can be preferentially satisfied.

According to an embodiment of the invention, reducing the opening degree of the plurality of in-vehicle cooling branches specifically comprises: obtaining a temperature difference between the plurality of zone temperatures. Determine if the temperature difference is greater than the fourth temperature threshold. If the temperature difference is greater than the fourth temperature threshold, the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the high temperature air outlet is located is increased, and the battery corresponding to the cooling branch where the high temperature air outlet is located is cooled. The opening of the branch is reduced. The fourth temperature threshold may be preset according to actual conditions, for example, may be 3 ° C.

In an embodiment of the invention, the plurality of cooling branches respectively correspond to the plurality of air outlets, and the plurality of regional temperatures are the temperatures of the plurality of air outlets.

For example, as shown in Fig. 21, four air outlets, which are an air outlet 1 - an air outlet 4, can be provided in the vehicle compartment. The corresponding zone temperature Tq is detected by detecting the tuyere temperature Tc. It is assumed that the air outlet 1 and the air outlet 2 are supplied with the cooling power by the first cooling branch 11, and the outlet 3 and the outlet 4 are provided with the cooling power by the second cooling branch 12.

Further, according to an embodiment of the present invention, the method for adjusting the temperature of the vehicle battery further includes: reducing the opening degree of the in-vehicle cooling branch corresponding to the cooling branch where the low temperature air outlet is located, and placing the air outlet having a low temperature The opening of the battery cooling branch corresponding to the cooling branch is increased.

Specifically, in the battery cooling process, if the air conditioner needs to be turned on in the vehicle, the ambient temperature in the vehicle compartment needs to be monitored and controlled, so that the ambient temperature throughout the vehicle is balanced, and at the same time, the battery cooling requirement can be met. As shown in Fig. 21, when it is detected that the temperature Tq of the air outlet 1 and the air outlet 2 is higher than the temperature Tq of the vicinity of the air outlet 3 and the air outlet 4 by more than 3 ° C, the first in-vehicle cooling branch is increased. The opening degree in the first battery reduces the opening degree in the first battery cooling branch so that the cooling power in the first in-vehicle cooling branch is large. The cold opening in the second in-vehicle cooling branch is also reduced, and the opening of the second battery cooling branch is increased to make the cooling power in the second in-vehicle cooling branch smaller. Thereby, the cooling power of the first battery cooling and the second battery cooling branch can be made constant, and at the same time, the temperature in the vicinity of the air outlets in the vehicle is equalized. When the vehicle air conditioner detects the air temperature at the air outlet 1, the air temperature Tq near the air outlet 2, and the temperature difference Tq in the vicinity of the air outlet 3 and the air outlet 4 are within 3 ° C, the first in-vehicle cooling branch and the second vehicle are controlled. The first expansion valve in the inner cooling branch has the same opening degree to ensure that the cooling power of the first in-vehicle cooling branch and the second in-vehicle cooling branch are the same.

According to an embodiment of the present invention, when in the heating mode, the method further comprises: determining whether the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2. If the temperature adjustment required power P1 of the battery is greater than the temperature adjustment actual power P2, the power difference between the temperature adjustment required power P1 of the battery and the actual power P2 of the temperature adjustment is acquired, and the power of the heater for cooling the battery is increased according to the power difference. Or adjust the coolant flow rate of the loop loop of the battery to increase the heating power of the battery. If the temperature adjustment required power P1 of the battery is less than or equal to the temperature adjustment actual power P2, reduce the power of the heater or keep the power of the heater unchanged, or adjust the coolant flow rate of the loop branch circuit of the battery to reduce the battery. Heating power.

Specifically, when in the heating mode, the batteries P1 and P2 are respectively taken and judged. If P1 is greater than P2, it means that if the heating temperature of the battery cannot be completed within the target time according to the current heating power or the coolant flow rate, the power difference between P1 and P2 of the battery is obtained, and the heating is increased according to the power difference. The power of the heater of the battery is increased by adjusting the rotational speed of the corresponding pump to increase the coolant flow rate of the loop branch circuit of the battery so that the battery can complete the temperature adjustment within the target time t. Among them, the greater the difference between P1 and P2, the more the power of the heater increases. If the P1 of the battery is less than or equal to P2, the power of the heater can be appropriately reduced to save power, or the coolant flow rate of the loop branch circuit of the battery can be reduced by adjusting the rotation speed of the corresponding pump to reduce Heat the power or keep the power of the heater constant. When the temperature of the battery is higher than the preset temperature, for example, 10 ° C, the battery is heated, and the information of the temperature adjustment function is turned off to the vehicle air conditioner through the CAN communication, and the heater is turned off. If the temperature adjustment system enters the heating mode for a long time, for example, after 1 hour, the temperature of the battery is still lower than 10 ° C, then the power of the heater is appropriately increased to allow the battery to complete the temperature rise as soon as possible.

According to an embodiment of the present invention, the temperature adjustment method of the vehicle battery may further include: if the temperature adjustment required power P1 of the battery is less than the temperature adjustment actual power P2, reducing the rotation speed of the pump in the flow path of the battery; if the temperature of the battery is adjusted When the required power P1 is greater than the temperature-regulated actual power P2, the rotational speed of the pump in the flow path of the battery is increased.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the P1 of the battery is less than P2, the rotation speed of the corresponding pump is controlled to be reduced to save power. If the P1 of the battery is greater than P2, the controller increases the power of the corresponding heater or compressor or increases the coolant flow of the loop circuit of the battery, and also controls the speed of the pump to increase, which can increase the flow per unit time. By adjusting the coolant quality of the cross section of the flow path, thereby increasing the temperature of the battery to adjust the actual power P2 to achieve temperature regulation within the target time t.

In summary, according to the method for adjusting the temperature of the vehicle battery according to the embodiment of the present invention, firstly, the temperature adjustment required power and the temperature adjustment actual power of the battery are separately obtained, and then the regional temperature and the air conditioning set temperature of the plurality of regions in the vehicle are respectively obtained. Then, according to the temperature adjustment demand power, the temperature adjustment actual power, the plurality of regional temperatures and the air conditioning set temperature, the opening degrees of the plurality of in-vehicle cooling branches, the plurality of battery cooling branches and the plurality of cooling branches are adjusted. Therefore, the method allocates the cooling capacity of the battery and each area in the vehicle according to the actual state of the battery and the temperature of the plurality of zones in the vehicle and the set temperature of the air conditioner, and can not only adjust the temperature when the battery temperature is too high or too low. In order to maintain the temperature of the battery within a preset range, it is also possible to equalize the temperature of each area in the compartment.

When the compressor 1 in which the battery supplies the refrigerant may be plural and independent of each other, both the in-vehicle cooling branch 3 and the battery cooling back branch 4 may be one.

For example, as shown in FIG. 28, taking the compressor as two examples, the first compressor 11 and the second compressor 12 are included. The controller can control the number of startups of the compressor according to the temperature adjustment demand power P1 and the temperature adjustment actual power P2.

Specifically, when the battery 6 is cooled, if P1 is greater than P2, control of a compressor is started, and if P1 is less than P2, both compressors are controlled to be started.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "plural" means at least two, for example two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any or a plurality of embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

1‧‧‧Compressor

2‧‧‧Condenser

3‧‧‧In-car cooling branch

4‧‧‧Battery cooling branch

5‧‧‧Battery temperature adjustment module

6‧‧‧Battery

11, 12‧‧‧ compressor

31‧‧‧Evaporator

32, 42‧‧‧ expansion valve

33, 43‧‧‧Electronic valve

41‧‧‧heat exchanger

51‧‧‧

52‧‧‧Media container, water tank

51, 52, 55, 56‧‧‧ temperature sensors

53‧‧‧heater

57‧‧‧Flow sensor

58‧‧‧ Valve

61, 62‧‧‧ battery

411, 412, 413, 414‧‧‧ regulating valves

511, 512, 522‧‧ ‧

CAN‧‧‧Controller Area Network

P, P1, P2, Px, Pz‧‧‧ power

T, Tq, Ts‧‧‧ temperature

V‧‧‧ flow rate

ΔT ₂ ‧‧‧temperature difference

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings in which Figures 1A through 1B are in accordance with the first embodiment of the present invention. 2 is a schematic diagram of a flow path structure of a temperature regulation system of a vehicle battery according to a second embodiment of the present invention; FIG. 3 is a schematic diagram of a flow path structure of a temperature regulation system of a vehicle battery according to a second embodiment of the present invention; FIG. 3A is a schematic diagram showing the operation principle of the controller according to an embodiment of the present invention; FIG. 4 is a diagram showing the temperature adjustment method of the vehicle battery according to the first embodiment of the present invention; FIG. 5 is a flowchart of a temperature adjustment method of a vehicle battery according to a second embodiment of the present invention; FIG. 6 is a flowchart of a temperature adjustment method of a vehicle battery according to a third embodiment of the present invention; 7 is a flowchart of a temperature adjustment method of a vehicle battery according to a fourth embodiment of the present invention; FIG. 8 is a temperature of a vehicle battery according to a fifth embodiment of the present invention. FIG. 9 is a schematic diagram showing a flow path structure of a temperature adjustment system of a vehicle battery according to a fourth embodiment of the present invention; FIG. 10 is a temperature adjustment method of a vehicle battery according to a sixth embodiment of the present invention; FIG. 11A to FIG. 11C are schematic diagrams showing a flow path structure of a temperature adjustment system of a vehicle battery according to a seventh embodiment of the present invention; FIGS. 12a to 12b are diagrams showing a sixth embodiment according to the present invention. A flowchart of a temperature adjustment method of a vehicle battery; FIG. 13 is a flowchart of a temperature adjustment method of a vehicle battery according to a seventh embodiment of the present invention; FIGS. 14A to 14B are diagrams according to an eighth embodiment of the present invention. FIG. 15 is a flowchart of a temperature adjustment method of a vehicle according to a first embodiment of the present invention; FIG. 16 is a temperature adjustment method of a vehicle according to a second embodiment of the present invention; Figure 17 is a flowchart of a temperature adjustment method of a vehicle according to a third embodiment of the present invention; Figure 18 is a temperature adjustment method of a vehicle according to a fourth embodiment of the present invention. 19A to 19B are schematic views showing a flow path structure of a temperature adjustment system of a vehicle battery according to an eighth embodiment of the present invention; and Fig. 20 is a temperature of the vehicle battery according to the ninth embodiment of the present invention; FIG. 21 is a schematic view showing a distribution position of an air outlet according to an embodiment of the present invention; and FIG. 22 is a flow chart showing a temperature adjustment method of a vehicle battery according to an eighth embodiment of the present invention; 1 is a flowchart of a temperature adjustment method of a vehicle battery according to a ninth embodiment of the present invention; and FIG. 24 is a schematic diagram showing a flow path structure of a temperature adjustment system of a vehicle battery according to a tenth embodiment of the present invention; A flowchart of a temperature adjustment method of a vehicle battery according to a tenth embodiment of the present invention; FIG. 26 is a schematic diagram showing a flow path structure of a temperature adjustment system of a vehicle battery according to an eleventh embodiment of the present invention; 26B is a schematic diagram showing a flow path structure of a temperature adjustment system of a vehicle battery according to a twelfth embodiment of the present invention; and FIG. 27 is an eleventh embodiment of the present invention. FIG. 28 is a schematic diagram showing a flow path structure of a temperature adjustment system of a vehicle battery according to a thirteenth embodiment of the present invention. FIG.

Claims (31)

A temperature adjustment system for a vehicle battery, wherein the temperature regulation system of the vehicle battery includes a plurality of compressors and a plurality of battery cooling circuits corresponding to the plurality of compressors, a plurality of batteries, and a connection between the plurality of batteries and the plurality of battery cooling circuits The plurality of battery temperature adjustment modules, the method comprising the steps of: separately obtaining the temperature adjustment required power of the plurality of batteries; respectively obtaining the temperature adjustment actual power of the plurality of batteries; adjusting the required power according to the temperature and adjusting the actual power according to the temperature at the target Controlling, by time, a corresponding battery temperature adjustment module of each battery to adjust the temperature of the battery to reach a target temperature, wherein the plurality of battery cooling circuits are connected to each other and adjusted according to the temperature of the battery The demand power and the temperature adjustment actual power adjust the degree of cooling provided by the plurality of compressors to the battery cooling circuit corresponding to the battery. The method for adjusting the temperature of the vehicle battery according to claim 1, further comprising: generating a total temperature adjustment required power according to the temperature of each of the batteries; generating the plurality according to the rated cooling power of the plurality of compressors The total rated cooling power of the compressor; determining whether the total temperature adjustment required power is greater than the total rated cooling power of the plurality of compressors; if the total temperature adjustment required power is greater than the total rated cooling power of the plurality of compressors, compressing the plurality The machine adjusts the cooling capacity of the battery cooling circuit corresponding to the battery to a maximum; if the total temperature adjustment required power is less than or equal to the total rated cooling power of the plurality of compressors, the required power is adjusted according to the total temperature and the total rated The difference in cooling power adjusts the cooling capacity of the battery cooling circuit corresponding to the battery. The method for adjusting the temperature of the vehicle battery according to the first aspect of the invention, wherein the separately obtaining the temperature adjustment required power of the plurality of batteries comprises: separately obtaining a first parameter of each battery opening temperature adjustment, and Generating a first temperature adjustment required power of each battery according to the first parameter; separately obtaining a second parameter of each battery during temperature adjustment, and generating a second temperature adjustment requirement of each battery according to the second parameter Power; generating the temperature regulation required power of each battery according to the first temperature adjustment required power and the second temperature adjustment required power. The method for adjusting a temperature of a vehicle battery according to claim 3, wherein the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target reaching the target temperature from the initial temperature. The generating the first temperature adjustment required power according to the first parameter specifically includes: acquiring a first temperature difference between the initial temperature and the target temperature; generating a first temperature adjustment requirement according to the first temperature difference and the target time power. The method for temperature regulation of an on-vehicle battery according to claim 4, wherein the first temperature adjustment required power is generated by the following formula: ΔT ₁ *C*M/t, wherein ΔT _{1 is} the initial temperature and the The first temperature difference between the target temperatures, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery. The method for adjusting a temperature of an on-vehicle battery according to claim 4, wherein the second parameter is an average current of the battery within a preset time, and the second temperature condition required power is generated by the following formula: I ² *R, where I is the average current and R is the internal resistance of the battery. The method for adjusting the temperature of the vehicle battery according to any one of the preceding claims, further comprising: detecting a temperature of the plurality of batteries; when the temperature of any one of the plurality of batteries is greater than the first temperature At the critical value, the cooling mode is entered; when the temperature of any of the plurality of batteries is less than the second temperature threshold, the heating mode is entered. The method for adjusting the temperature of an on-vehicle battery according to claim 7, wherein, when in the cooling mode, adjusting the required power according to the temperature and adjusting the actual power to the corresponding battery temperature adjustment mode of each of the batteries The group performs control to adjust the temperature of the battery, and specifically includes: determining whether the temperature adjustment required power of each battery is greater than a temperature adjustment actual power corresponding to each battery; if the temperature adjustment demand power of a battery is greater than the battery Corresponding temperature adjustment actual power, obtaining a power difference between the temperature adjustment required power of the battery and the temperature adjustment actual power, and increasing the power of the compressor for cooling the battery according to the power difference, or adjusting the increase The cooling fluid flow of the battery cooling circuit corresponding to the battery to increase the cooling power of the battery; if the temperature regulation required power of the battery is less than or equal to the temperature corresponding to the battery, the power of the compressor is reduced or Keep the power of the compressor unchanged, or adjust to reduce the corresponding battery The coolant flow in the pool cooling circuit to reduce the cooling power of the battery. The method for adjusting the temperature of an on-vehicle battery according to claim 7, wherein, when in the heating mode, adjusting the required power according to the temperature and adjusting the actual power to the corresponding battery temperature adjustment mode of each of the batteries The group performs control to adjust the temperature of the battery, and specifically includes: determining whether the temperature adjustment required power of each battery is greater than a temperature adjustment actual power corresponding to each battery; if the temperature adjustment demand power of a battery is greater than the battery Corresponding temperature adjustment actual power, obtaining a power difference between the temperature adjustment required power of the battery and the temperature adjustment actual power, and increasing the power of the heater for cooling the battery according to the power difference to increase the battery Heating power; if the temperature adjustment required power of the battery is less than or equal to the temperature corresponding to the battery, the power of the heater is reduced to reduce the heating power of the battery or maintain the power of the heater constant. The method for adjusting the temperature of the vehicle battery according to claim 8 or 9, further comprising: if the temperature adjustment required power of the battery is less than the corresponding temperature adjustment actual power, reducing the water pump The speed of rotation; if the temperature adjustment required power of the battery is greater than the corresponding temperature adjustment actual power, the speed of the water pump is increased. The method for adjusting the temperature of the vehicle battery according to the first aspect of the invention, wherein the separately obtaining the temperature-regulating actual power of the plurality of batteries comprises: obtaining an inlet temperature and an outlet of the first-class road for adjusting the temperature of each battery. Temperature, and obtaining a flow rate of the coolant flowing into the flow path; generating a second temperature difference of each battery according to the flow path inlet temperature and the outlet temperature of each of the batteries; according to the second temperature difference of the each battery and the flow rate The temperature of each battery is generated to adjust the actual power. The temperature adjustment method of the vehicle battery according to claim 11, wherein the temperature adjustment actual power is generated by the following formula: ΔT ₂ *c*m, wherein the ΔT _{2 is} the second temperature difference, and c is The specific heat capacity of the coolant in the battery cooling circuit, m is the mass of the coolant flowing through the cross-sectional area of the flow path per unit time, wherein m=v*ρ*s, v is the flow rate of the coolant, and ρ is the The density of the coolant, s is the cross-sectional area of the flow path. The method for temperature regulation of an on-vehicle battery according to claim 1, wherein the compressor for supplying the battery to the battery is plural, the method further comprising: adjusting the required power and each compressor according to the temperature The rated cooling power determines the number of compressors that are started; when in the cooling mode, the corresponding number of compressors are controlled to start. The method for adjusting a temperature of a vehicle battery according to claim 1, wherein the cooling of the battery cooling circuit corresponding to the battery is adjusted according to the temperature adjustment required power of the battery and the actual power adjustment. The opening degree specifically includes: determining whether the temperature adjustment required power of each battery is greater than the temperature adjustment actual power of the battery; if the temperature adjustment demand power of the battery is greater than the temperature adjustment actual power of the battery, increasing the multiple compressor Or the cooling power of a single compressor, or increase the cooling capacity provided to the battery cooling circuit corresponding to the battery. A temperature regulation system for a vehicle battery, comprising: a plurality of compressors; a plurality of condensers connected to the plurality of compressors; a plurality of battery cooling circuits connected between the plurality of compressors and the plurality of condensers, wherein the plurality of batteries are cooled The loops are connected to each other; a plurality of battery temperature adjustment modules respectively connected to the plurality of batteries and the plurality of battery cooling circuits are respectively configured to obtain the temperature adjustment required power and the temperature adjustment actual power of the plurality of batteries, and adjust the required power according to the temperature And adjusting the temperature of the battery to the target temperature within the target time, and adjusting the required power according to the temperature and adjusting the actual power according to the temperature to adjust the plurality of compressors to provide corresponding battery cooling circuits of the battery The degree of cooling capacity. The temperature regulation system for a vehicle battery according to claim 15, wherein the battery cooling circuit comprises a heat exchanger connected to the battery temperature adjustment module. The temperature regulation system of the vehicle battery according to claim 15, wherein the battery temperature adjustment module comprises: a first-class road for adjusting the temperature of the battery, the flow path is disposed in the battery; and is connected to the flow path a water pump, a medium container, a heater, and a controller between the heat exchanger, wherein the controller obtains temperature regulation demand power and temperature adjustment actual power of the plurality of batteries, and according to the temperature Adjusting the required power and adjusting the actual power of the temperature adjusts the temperature of the battery. The temperature regulation system of the vehicle battery according to claim 17, wherein the battery temperature adjustment module further comprises: a first temperature sensor respectively disposed at an inlet of the flow path, respectively disposed in the flow A second temperature sensor at the exit of the road, and a flow sensor. The temperature regulation system for a vehicle battery according to claim 18, wherein the controller is further configured to generate a total temperature adjustment required power according to a temperature adjustment required power of each of the batteries, and according to the plurality of compressors The rated cooling power generates a total rated cooling power of the plurality of compressors, and determines whether the total temperature regulation required power is greater than a total rated cooling power of the plurality of compressors, wherein when the total temperature regulation demand power is greater than the total amount of the plurality of compressors When the cooling power is fixed, the controller adjusts the cooling capacity of the plurality of compressors to the battery cooling circuit corresponding to the battery to a maximum; when the total temperature adjustment required power is less than or equal to the total rated cooling power of the plurality of compressors The controller adjusts the cooling capacity of the battery cooling circuit corresponding to the battery according to the difference between the total temperature adjustment demand power and the total rated cooling power. The temperature regulation system of the vehicle battery according to claim 17, wherein the controller is configured to respectively acquire a first parameter of each battery opening temperature adjustment, and generate each battery according to the first parameter. The first temperature adjusts the required power, and separately obtains a second parameter of each battery during temperature adjustment, and generates a second temperature adjustment required power of each battery according to the second parameter, and adjusts the demand according to the first temperature The power and the second temperature regulation demand power produce the temperature regulation demand power of each battery. The temperature regulation system of the vehicle battery according to claim 20, wherein the first parameter is an initial temperature and a target temperature when the battery is turned on, and a target time from the initial temperature to the target temperature, The controller acquires a first temperature difference between the initial temperature and the target temperature, and generates a first temperature adjustment required power according to the first temperature difference and the target time. The temperature regulation system for a vehicle battery according to claim 21, wherein the controller generates the first temperature adjustment required power by: ΔT ₁ *C*M/t, wherein ΔT _{1 is} the The first temperature difference between the initial temperature of the battery and the target temperature, t is the target time, C is the specific heat capacity of the battery, and M is the quality of the battery. The temperature regulation system of the vehicle battery according to claim 20, wherein the second parameter is an average current of each battery within a preset time, and the controller generates the battery by using the following formula: The second temperature adjustment requires power: I ² *R, where I is the average current and R is the internal resistance of the battery. The temperature regulation system for a vehicle battery according to any one of the preceding claims, wherein the controller is further configured to detect a temperature of the plurality of batteries, and in the plurality of batteries Controlling the temperature adjustment system to enter a cooling mode when the temperature of any of the batteries is greater than the first temperature threshold, and controlling the temperature adjustment system to enter the heating mode when the temperature of any of the plurality of batteries is less than the second temperature threshold . The temperature regulation system of the vehicle battery according to claim 24, wherein, when in the cooling mode, the controller acquires when the temperature adjustment required power of a battery is greater than the temperature adjustment actual power of the battery The temperature of the battery adjusts the power difference between the required power and the actual power of the temperature adjustment, and increases the power of the compressor for cooling the battery according to the power difference, or adjusts the coolant flow rate of the battery cooling circuit corresponding to the battery. To increase the cooling power of the battery, and to reduce the power of the compressor or maintain the power of the compressor when the temperature adjustment demand power of the battery is less than or equal to the temperature corresponding to the battery. Or adjusting the coolant flow rate of the battery cooling circuit corresponding to the battery to reduce the cooling power of the battery. The temperature regulation system of the vehicle battery according to claim 24, wherein, when in the heating mode, the controller acquires when the temperature adjustment required power of a battery is greater than the temperature adjustment actual power of the battery The temperature of the battery adjusts the power difference between the required power and the actual power of the temperature adjustment, and according to the power difference, increases the power of the heater for cooling the battery or adjusts the coolant flow rate of the loop branch circuit of the battery. To increase the heating power of the battery, and to adjust the actual power when the temperature adjustment required power of the battery is less than or equal to the temperature corresponding to the battery, reduce the power of the heater or adjust the loop of the battery to reduce the loop of the battery. Coolant flow to reduce the heating power of the battery or to maintain the power of the heater. The temperature regulation system of the vehicle battery according to claim 24, wherein the controller is further configured to: when the temperature adjustment required power of the certain battery is less than the corresponding temperature adjustment actual power, reduce the water supply The speed of the pump, and when the temperature adjustment demand power of the certain battery is greater than the corresponding temperature to adjust the actual power, the speed of the water pump is increased. The temperature regulation system of the vehicle battery according to claim 18, wherein the controller generates each of the inlet temperature detected by the first temperature sensor and the outlet temperature detected by the second temperature sensor. The second temperature difference of the batteries, and the actual temperature of the temperature adjustment of each of the batteries is generated according to the second temperature difference of the each battery and the flow rate detected by the flow rate sensor. The temperature regulation system for a vehicle battery according to claim 28, wherein the temperature adjustment actual power is generated by the following formula: ΔT ₂ *c*m, wherein the ΔT _{2 is} the second temperature difference, and c is The specific heat capacity of the coolant in the battery cooling circuit, m is the mass of the coolant flowing through the cross-sectional area of the flow path per unit time, where m = v * ρ * s, v is the flow rate of the coolant, ρ is The density of the coolant, s is the cross-sectional area of the flow path. The temperature regulation system for an on-vehicle battery according to claim 15, wherein the compressor for supplying the battery to the battery is plural, and the controller is further configured to: adjust the required power and each according to the temperature The rated cooling power of the compressor determines the number of compressors that are started, and controls the corresponding number of compressors to start when the temperature regulating system is in the cooling mode. The temperature regulation system of the vehicle battery according to claim 15, wherein the controller is further configured to increase the temperature when the temperature difference between the batteries exceeds a set value when in the cooling mode. The cooling power of the battery; when in the heating mode, when the temperature difference between the batteries exceeds a set value, the heating power of the battery having a lower temperature is increased.