TW201916449A - Vehicle-mounted battery temperature regulation system - Google Patents

Abstract

The invention discloses a vehicle-mounted battery temperature regulation system, comprising an on-board air conditioning module comprising a cooling branch and a battery cooling branch connected in series with the cooling branch, wherein the refrigeration branch comprises a compressor and a condenser, and the battery cooling branch The circuit includes a valve connected with a heat exchanger and a heat exchanger; a battery temperature adjusting module connected with a battery cooling branch to form a heat exchange flow path, wherein the battery temperature adjusting module comprises a medium container, a pump, and a medium container A plurality of mutually connected temperature regulating branches connected to the pump, a plurality of mutually connected temperature regulating branches respectively connected to a plurality of parallel connected batteries, and a controller connected to the on-board air conditioning module and the battery temperature regulating module for regulating The temperature of the battery. The temperature adjustment system of the present invention can adjust the temperature when the temperature of the on-board battery is too high or too low, so that the temperature of the on-board battery is maintained within a preset range, and the situation that the performance of the on-board battery is affected by the temperature is avoided.

Description

Temperature regulation system of vehicle battery

The invention relates to the technical field of automobiles, and in particular to a temperature regulating system for a vehicle battery.

At present, the performance of the on-board battery of electric vehicles is greatly affected by the climatic environment. Too high or low ambient temperature will affect the performance of the on-board battery. Therefore, the temperature of the on-board battery needs to be adjusted to maintain its temperature within a preset range. .

In related technologies, for regions with hot climates, by adding battery cooling systems to electric vehicles to reduce the temperature of vehicle batteries when the temperature of the vehicles is too high; for regions with cold climates, by adding battery heating systems to electric vehicles, To increase the temperature of the on-board battery when it is too cold.

However, for areas with hot summers and cold winters, the above methods cannot solve the problem of too high and low temperature of the car battery, and the method of adjusting the temperature of the car battery is rough, and it cannot be heated according to the actual condition of the car battery The power and cooling power are precisely controlled, so the temperature of the on-board battery cannot be guaranteed to stay within the preset range.

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

To this end, an object of the present invention is to provide a temperature adjustment system for a vehicle battery, which can adjust the temperature when the temperature of the vehicle battery is too high or too low, so as to maintain the temperature of the vehicle battery in a preset range and avoid the influence of temperature. Car battery performance.

In order to achieve the above object, an embodiment of the present invention proposes a temperature adjustment system for a vehicle battery, including: a vehicle air-conditioning module, the vehicle air-conditioning module includes a refrigeration branch and a battery cooling branch connected in series with the refrigeration branch, wherein The refrigeration branch includes a compressor and a condenser connected to the compressor. The battery cooling branch includes a heat exchanger and a valve connected to the heat exchanger. The battery cooling branch is connected to the battery cooling branch to form a heat exchange flow path. Battery temperature adjustment module, wherein the battery temperature adjustment module includes a medium container, a pump, and a plurality of temperature adjustment branches connected in parallel with the medium container and the pump, and the plurality of temperature adjustment branches connected in parallel with each other are respectively The plurality of parallel-connected batteries are connected; a controller, the controller is connected to the vehicle air-conditioning module and a battery temperature adjustment module for adjusting the temperature of the battery.

According to the temperature adjustment system of the vehicle battery in the embodiment of the present invention, the controller adjusts the temperature of the battery by controlling the battery temperature adjustment module. Therefore, the system can adjust the temperature when the temperature of the vehicle battery is too high or too low, so as to maintain the temperature of the vehicle battery in a preset range, and avoid the situation that the performance of the vehicle battery is affected by the temperature. In addition, the temperature adjustment system of the vehicle battery according to the above embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the above-mentioned temperature regulation system for an on-board battery further includes: a battery state detection module connected to the battery, and the battery state detection module is configured to detect a current of the battery.

According to an embodiment of the present invention, each of the temperature regulating branches includes: a first temperature sensor for detecting an inlet temperature of a medium flowing into the battery; and a second temperature sensor for detecting a temperature of the medium flowing out of the battery. Outlet temperature of the medium; flow rate sensor for detecting the flow rate of the medium in the heat exchange flow path.

According to an embodiment of the present invention, the battery temperature adjustment module further includes a heater, which is connected to the controller and is used for heating the medium in the heat exchange flow path.

According to an embodiment of the present invention, the battery temperature adjustment module further comprises: a total flow rate sensor connected to the pump, for detecting the total flow rate of the medium flowing into the heat exchange flow path of the plurality of temperature adjustment branches.

According to an embodiment of the present invention, the battery temperature adjustment module further includes: a total temperature sensor connected to the medium container, for detecting a total outlet temperature of the medium flowing out of the plurality of batteries.

According to an embodiment of the present invention, the controller includes: a battery management controller, a battery thermal management controller, and a vehicle air-conditioning controller, wherein the battery management controller is connected to the battery status detection module to obtain the battery. Power required for temperature regulation; the battery thermal management controller is connected to the pump, the first temperature sensor, the second temperature sensor, the flow rate sensor and the heater to obtain the actual temperature regulation power of the battery, And adjusting the power of the heater according to the temperature adjustment actual power and the temperature adjustment actual power to adjust the temperature of the battery; the vehicle air-conditioning controller is connected to the compressor and the valve for adjusting the required power according to the temperature The actual power is adjusted with the temperature to adjust the power of the compressor to adjust the temperature of the battery.

According to an embodiment of the present invention, the battery management controller is further configured to obtain a temperature of the battery. When the temperature of the battery is greater than a first temperature threshold, the temperature adjustment system enters a cooling mode, and the temperature of the battery is controlled. When less than the second temperature threshold, the temperature adjustment system enters a heating mode.

According to an embodiment of the present invention, when the temperature adjustment required power is greater than the temperature adjustment actual power, the vehicle air-conditioning controller obtains a power difference between the temperature adjustment required power and the temperature adjustment actual power; when in a cooling mode The vehicle air-conditioning controller increases at least one of the power of the compressor for cooling the battery and the opening degree of the valve according to the power difference, and decreases when the temperature adjustment required power is less than or equal to the temperature adjustment actual power. At least one of the power of the compressor holding the battery and the opening of the valve; when in the heating mode, the battery thermal management controller increases the power of the heater for heating the battery according to the power difference, and When the temperature adjustment required power is less than or equal to the temperature adjustment actual power, the power of the heater is reduced / maintained.

According to an embodiment of the present invention, when the temperature adjustment required power is less than or equal to the temperature adjustment actual power, the battery thermal management controller is further configured to reduce / maintain the speed of the pump; at the temperature adjustment required power is greater than the temperature The battery thermal management controller is also used to increase the speed of the pump when adjusting the actual power.

According to an embodiment of the present invention, the vehicle-mounted air conditioning module further includes an in-vehicle cooling branch connected in series with the cooling branch and in parallel with the battery cooling branch.

According to an embodiment of the present invention, the heat exchanger is a plate heat exchanger.

According to an embodiment of the present invention, the refrigeration branch is plural, the battery cooling branch is plural, and the plurality of battery cooling branches are respectively connected to the plurality of compressors through a plurality of valves.

According to an embodiment of the present invention, the in-vehicle cooling branch is plural, and each of the in-vehicle cooling branches includes an evaporator corresponding to the compressor and a valve connected to the evaporator.

According to an embodiment of the present invention, each of the battery cooling branches is provided with a temperature sensor for detecting a temperature of a medium on the battery cooling branch.

According to an embodiment of the present invention, each of the battery cooling branches is provided with a flow velocity sensor for detecting a flow rate of a medium on the battery cooling branch.

According to an embodiment of the present invention, the cooling branch is plural, the battery cooling branch is one, and the plurality of cooling branch machines are connected to the battery cooling branch.

An embodiment of the present invention is described in detail below. An example of the embodiment is shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The following describes a temperature adjustment system for a vehicle battery according to an embodiment of the present invention with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a flow path of a temperature adjustment system of a vehicle battery according to a first embodiment of the present invention. As shown in FIG. 1, the temperature regulation system of the vehicle battery may include: a vehicle air-conditioning module 100, a battery temperature adjustment module 5, and a controller (not specifically shown in the figure).

The vehicle-mounted air conditioning module 100 may include a cooling branch 10 and a battery cooling branch 4 connected in series with the cooling branch 10. The cooling branch 10 may include a compressor 1 and a condenser 2 connected to the compressor 1. The cooling branch 4 may include a valve connected to the heat exchanger 41 and a valve connected to the heat exchanger 41. The battery temperature adjustment module 5 is connected to the battery cooling branch 4 to form a heat exchange flow path. The battery temperature adjustment module 5 may include a medium container 52, a pump 51, and a plurality of parallel connected to the medium container 52 and the pump 51. The temperature-adjusting branches are connected to a plurality of batteries in parallel. The controller is connected to the vehicle air-conditioning module 100 and the battery temperature adjustment module 5 for adjusting the temperature of the battery. The battery temperature adjustment module 5 may further include a heater 53. The heater 53 may be a PTC (Positive Temperature Coefficient, a semiconductor material or component with a large positive temperature coefficient), a heat exchanger, and a heat exchanger. 41 can be a plate heat exchanger.

Specifically, as shown in FIG. 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 adjustment module 5. The first pipe is connected to the battery temperature adjustment module 5. The second pipeline is arranged adjacent to each other independently, so that the medium (mobile medium such as refrigerant, water, oil, air, or medium such as phase change materials, or other chemicals) is independent of each other. When the temperature of the battery is too high, the cooling function of the vehicle air conditioner is turned on and the battery cooling function is started. The flow direction of the medium (such as refrigerant) in the first pipe and the second pipe is: compressor 1-condenser 2-battery cooling branch 4—compressor 1 and battery cooling branch 4—battery temperature adjustment module 5—battery—battery temperature adjustment module 5—battery cooling branch 4

In the above embodiment, the vehicle air conditioner is only used to cool the battery, and the temperature adjustment system may also cool both the vehicle compartment and the battery through the vehicle air conditioner. When the system cools both the cabin and the battery through the vehicle air conditioner, as shown in FIG. 2, in an embodiment of the present invention, the vehicle air conditioning module 100 may further include a series connection with the cooling branch circuit 10 and a battery cooling branch. The internal cooling branch 3 of the road 4 is connected in parallel. The cooling branch 3 in the vehicle may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33.

Specifically, the interior of the vehicle-mounted air conditioner is divided into two independent cooling branches starting from the condenser 2, which are the internal cooling branch 3 and the battery cooling branch 4, respectively. The internal cooling branch 3 is in the compartment through its evaporator 31. The space provides cooling power, and the battery cooling branch 4 provides cooling power for battery cooling through its heat exchanger 41. When the temperature inside the car is too high, the cooling function in the car is started, and the flow direction of the medium is: compressor 1-condenser 2-car cooling branch 3-compressor 1. When the temperature of the battery is too high, the battery cooling function is activated, and the flow direction of the medium in the first and second pipes is: compressor 1-condenser 2-battery cooling branch 4-compressor 1 and battery cooling branch 4 —Battery temperature adjustment module 5—Battery—Battery temperature adjustment module 5—Battery cooling branch 4. Therefore, the temperature of the vehicle battery can be adjusted when the temperature of the vehicle battery is too high or too low, so that the temperature of the vehicle battery is maintained in a preset range, which avoids the situation that the performance of the vehicle battery is affected by the temperature. If the requirements are met, the temperature inside the car can meet the demand.

It should be noted that when the temperature of the battery is adjusted, a plurality of temperature adjustment branches connected in parallel with each other respectively adjust the temperature of the corresponding battery.

Further, according to an embodiment of the present invention, the battery cooling branch may include a valve and a heat exchanger 41, wherein one end of the valve is connected to the condenser 2 and the other end is connected to the heat exchanger 41. The other end is connected to the compressor 1, and the valve may include a second electronic valve 43 and a second expansion valve 42.

Specifically, the battery cooling branch 4 mainly provides cooling power to the battery 6 through a heat exchanger 41 (such as a plate heat exchanger). Among them, as shown in FIG. 2, the battery cooling branch 4 may further include a second expansion valve 42 and a second electronic valve 43. 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 is used to control the refrigerant flow rate of the battery cooling branch 4.

As shown in FIG. 2, the heat exchanger 41 may include a first pipe and a second pipe, the second pipe is connected to the battery temperature adjustment module 5, and the first pipe is connected to the compressor 1, wherein the first pipe is connected to the first pipe and the second pipe. The two pipes are set up independently of each other. In the embodiment of the present invention, the physical location of the heat exchanger 41 may be located in the circuit where the vehicle-mounted air-conditioning compressor 1 is located, which is convenient for the factory-adjustment of the vehicle-mounted air-conditioner, and enables the vehicle-mounted air-conditioner to be separately supplied and assembled. Only need to fill the medium (refrigerant) once. The physical location of the heat exchanger 41 may also be located in the circuit where the battery is located, and the physical location of the heat exchanger 41 may also be set independently of the circuit where the vehicle-mounted air conditioning compressor 1 is located and the circuit where the battery is located.

In addition, if the heat exchanger 41 is installed in the battery temperature adjustment module 5, the refrigerant circuit of the vehicle air conditioner is not completely sealed, so the second electronic valve 43 needs to be closed first, and then the refrigerant is filled. After being installed in the vehicle, After it is docked with the battery temperature adjustment module 5, the second electronic expansion valve 43 is opened and the vacuum is filled again to fill the refrigerant, and the normal work can be performed.

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

According to an embodiment of the present invention, as shown in FIG. 3, the above-mentioned temperature adjustment system of the vehicle battery further includes: a battery state detection module respectively connected to the battery, and the battery state detection module is configured to detect a battery current. The battery status detection module may be a current sensor.

According to an embodiment of the present invention, as shown in FIG. 3, each temperature adjustment branch may include a first temperature sensor, a second temperature sensor, and a flow rate sensor. The first temperature sensor is connected to the pump 51 to detect the inlet temperature of the medium flowing into the battery, the second temperature sensor is used to detect the outlet temperature of the medium flowing out of the battery, and the flow rate sensor is used to detect the heat exchange flow path. The flow rate of the medium.

Further, according to an embodiment of the present invention, the battery temperature adjustment module 5 further includes: a heater 53, which is connected to the controller and is used for heating the medium in the heat exchange flow path.

Specifically, the heater 53, the pump 51, the cooling flow path in the battery 6, and the medium container 52 are connected in series, that is, the positions of the parts connected in series are not limited. The flow velocity sensor is provided on the series circuit. The temperature sensor is disposed at the entrance of the cooling flow path of the battery, and the second temperature sensor is disposed at the exit of the cooling flow path of the battery. For example, the heater 53 is connected to the heat exchanger 41, the pump 51 is connected to the heater 53 and the first end of the cooling flow path of the battery, and the first temperature sensor is provided at the entrance of the cooling flow path of the battery 6 (the first End) for detecting the inlet temperature of the medium of the battery, the medium container 52 is connected to the second end of the cooling flow path of the battery 6, and the second temperature sensor is provided at the outlet of the cooling flow path of the battery 6 (the second end ) Is used to detect the outlet temperature of the medium of the battery, and the flow rate sensor is provided at the outlet of the cooling flow path of the battery 6 to detect the flow rate of the medium of the battery 6.

According to an embodiment of the present invention, as shown in FIG. 3, the battery temperature adjustment module 5 may further include a total flow rate sensor 59 and a total temperature sensor 508 connected to the pump 51, which are respectively used to detect the inflow complex number. The total flow velocity of the medium in the heat exchange flow path of the temperature adjustment branch, and the total temperature of the medium flowing into the heat exchange flow path of the plurality of temperature adjustment branches is detected.

Further, according to an embodiment of the present invention, as shown in FIG. 3, the battery temperature adjustment module 5 may further include a total temperature sensor 58 connected to the medium container 52 for detecting the medium flowing out of the plurality of batteries. Total outlet temperature.

In addition, in the embodiment of the present invention, as shown in FIG. 3, each temperature regulating branch may further include a regulating valve, and the openings of the regulating valve 60 and the regulating valve 601 are controlled by the first battery 61 and the second battery 62. The required cooling power is determined. The regulating valve 60 is used to control the cooling flow of the cooling branch of the first battery 61, and the regulating valve 601 is used to control the cooling flow of the cooling branch of the second battery 62.

Specifically, when the battery temperature is higher than the set value, the battery cooling function is started. At this time, the second electronic valve 43 is opened, but the direction of the media loop in the battery has two directions. Direction 1: heat exchanger 41-heating 53 (closed)-pump 51-regulating valve 60-flow rate sensor 571-first temperature sensor 551-first battery 61-second temperature sensor 561-medium container 52-heat exchanger 41. Direction 2: heat exchanger 41—heater 53 (closed) —pump 51—regulating valve 601—flow rate sensor 572—first temperature sensor 552—second battery 62—second temperature sensor 562—medium Container 52—heat exchanger 41.

When the battery temperature is lower than the set value, the battery heating function is activated, the second electronic valve 43 is closed, and the heater 53 is activated. The flow direction of the medium in the battery cooling pipe has two directions, direction 1: heat exchanger 41-heater 53 (start)-pump 51-regulating valve 60-flow rate sensor 571-first temperature sensor 551-first A battery 61-a second temperature sensor 561-a medium container 52-a heat exchanger 41. Direction 2: heat exchanger 41-heater 53 (start)-pump 51-regulating valve 601-flow rate sensor 572-first temperature sensor 552-second battery 62-second temperature sensor 562-medium Container 52—heat exchanger 41. The two battery cooling branches described above are connected in parallel.

In an embodiment of the present invention, as shown in FIG. 4, the controller may include a battery management controller, a battery thermal management controller, and a vehicle air-conditioning controller, wherein the battery management controller is connected to a battery status detection module. Is used to obtain the temperature adjustment required power P1 of the battery. The battery thermal management controller is connected to the pump 51, the first temperature sensor, the second temperature sensor, the flow rate sensor and the heater 53 to obtain the battery's The temperature adjusts the actual power P2, and adjusts the power of the heater 53 according to the temperature adjustment demand power P1 and the temperature adjustment actual power P2 to adjust the temperature of the battery. The vehicle air-conditioning controller is connected to the compressor 1 and the valves (the first electronic valve 33, the second electronic valve 43, the first expansion valve 32, and the second expansion valve 42), and is used to adjust the required power P1 and the actual power according to the temperature. P2 regulates the power of the compressor 1 to regulate the temperature of the battery.

Specifically, the battery thermal management controller may communicate with the first temperature sensor 551, the first temperature sensor 552, the second temperature sensor 561, the second temperature sensor 562, the flow rate sensor 571, and the flow rate sensor. The tester 572 is connected to perform CAN communication with the pump 51 and the heater 53. According to the specific heat capacity of the medium, the density of the medium, and the cross-sectional area of the flow path, the temperature adjustment actual power P2 is obtained, and the speed of the pump 51 and the heater are controlled 53 power. The battery management controller collects the current flowing through the battery, the temperature of the battery itself, and obtains the temperature adjustment required power P1 according to the battery's target temperature, target time t, and 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 car air-conditioning controller to start or stop working. The vehicle air-conditioning controller is connected to the expansion valve and the electronic valve, and the vehicle air-conditioning controller can perform CAN communication with the battery management controller, the battery thermal management controller, and the compressor 1 to adjust the required power P1 according to the temperature obtained by the battery management controller. And the temperature adjustment actual power P2 obtained by the battery thermal management controller controls the power P of the compressor, the opening and closing of the expansion valve and the electronic valve, so as to achieve the purpose of controlling the heat exchange amount.

The battery thermal management controller can detect the total water inlet temperature through the total temperature and temperature sensor 508, and the total water outlet temperature through the total temperature sensor 58 to calculate the temperature difference between the water inlet and outlet. The total flow rate sensor 59 can measure the total medium temperature For the branch flow rate, the current actual cooling / heating power of the total battery cooling branch is estimated from the above three parameters. The battery thermal management controller can control whether the heater 53 works and adjust the heating power of the heater 53 through CAN communication. The battery thermal management controller can control the working state of the pump 51 through the CAN line, thereby controlling the flow rate of the battery medium.

The battery thermal management controller checks the temperature of the water inlet of the first battery 61 through the first temperature sensor 551, detects the temperature of the water outlet of the first battery 61 through the second temperature sensor 561, calculates the temperature difference between the water inlet and the water, and detects the temperature through the flow velocity. The device 571 can measure the flow velocity of the medium in the cooling branch branch of the first battery 61, and estimate the current actual cooling / heating power of the cooling branch branch of the first battery 61 through the above three parameters. The current actual cooling / heating power of the cooling branch branch of the second battery 62 is estimated in the same manner. The battery thermal management controller may control the openings of the regulating valve 60 and the regulating valve 601 according to the battery temperature conditions of the first battery 61 and the second battery 62 to control the cooling branch branches of the first battery 61 and the second battery 62. The medium flow is distributed so as to control the cell temperature balance between the first battery 61 and the second battery 62. When the vehicle needs to be cooled, if the temperature of the first battery 61 is higher than the temperature of the second battery 62, the opening degree of the regulating valve 60 can be increased and the opening degree of the regulating valve 601 can be reduced. When the average temperatures of the two batteries 62 are equal, the openings of the control valve 60 and the control valve 601 can be controlled to keep the temperature of the two batteries balanced.

In addition, the battery thermal management controller can control the operation of the heater 53 and adjust the heating power of the heater through CAN communication. When the heater 53 receives the battery heating function activation information sent by the battery thermal management controller, the battery thermal management is started. The controller sends the heating power demand of the battery immediately, and the heater 53 adjusts the output power according to the heating power demand. At the same time, the battery thermal management controller can also control the working state of the pump through CAN communication, so as to control the flow rate and flow direction of the battery medium. After receiving the pump 51 startup information sent by the battery thermal management controller, it starts to work, and according to the battery The flow information sent by the thermal management controller adjusts the speed and flow.

In order to keep the temperatures of the first battery 61 and the second battery 62 equal, during 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 a preset temperature ( (Eg, 3 ° C), that is, T61-T62> 3 ° C, the battery thermal management controller controls the opening of the regulating valve 60 in the cooling branch of the first battery 61 to increase, and controls the opening of the regulating valve 601 in the cooling branch of the second battery 62 The opening degree is reduced so that the cooling power of the first battery 61 is increased and the cooling power of the second battery 62 is reduced, thereby achieving temperature equilibrium between the first battery 61 and the second battery 62. If T62-T61> 3 ° C, the battery thermal management controller controls the opening degree of the regulating valve 601 in the cooling branch of the second battery 62 to increase, and decreases the opening degree of the regulating valve 60 in the cooling branch of the first battery 61. In order to increase the cooling power of the second battery 62 and decrease the cooling power of the first battery 61, the temperature balance of the first battery 61 and the second battery 62 is achieved.

In an embodiment of the present invention, the pump 51 is mainly used to provide power, and the medium container 52 is mainly used to store the medium and receive the medium added to the temperature adjustment system. When the medium in the temperature adjustment system decreases, the The media can be replenished automatically. The heater 53 can perform CAN communication with the controller to provide heating power for the temperature adjustment system of the vehicle battery. Under the control of the controller, the heater 53 can be arranged at any position between the medium container 52 and the first temperature sensor. That is, the heater 53 is not in direct contact with the battery, and has high safety, reliability and practicability.

It can be understood that when the medium of the air conditioner is connected to the battery temperature adjustment module 5, there is no need to provide a heat exchanger 41, a pump 51, and a medium container 52. This way of communication between 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.

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, taking the first battery 61 as an example.

According to an embodiment of the present invention, the battery management controller for obtaining the temperature adjustment required power of the battery specifically includes: obtaining a first parameter when the battery is turned on for temperature adjustment, generating the first temperature adjustment required power according to the first parameter, and obtaining the battery The second parameter during temperature adjustment generates a second temperature adjustment required power according to the second parameter, and generates a temperature adjustment required power P1 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 adjusted, and a target time from when the initial temperature reaches the target temperature, and the controller obtains a first value between the initial temperature and the target temperature. The temperature difference generates a first temperature adjustment demand power according to the first temperature difference and the target time.

Furthermore, according to an embodiment of the present invention, the battery management controller can generate the first required power for temperature adjustment by using the formula (1): ΔT ₁ * C * M / t (1) where ΔT ₁ is the initial temperature The first temperature difference from 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 the battery within a preset time, and the battery management controller generates the second temperature adjustment required power through the following formula (2): I ² * R (2) where I is the average current and R is Internal resistance of the battery.

According to an embodiment of the present invention, the battery thermal management controller generates a second temperature difference according to the inlet temperature and the outlet temperature, and generates a temperature adjustment actual power P2 according to the second temperature difference and the flow rate.

Further, according to an embodiment of the present invention, the battery thermal management controller may obtain the temperature-regulated actual power through the following formula (3): ΔT ₂ * c * m (3) where ΔT ₂ is the first temperature and the second temperature The difference between them, c is the specific heat capacity of the medium in the flow path, m is the quality of the medium flowing through the cross section of the flow unit per unit time, where m = v * ρ * s, v is the flow velocity of the medium, and ρ is the medium Density, s is the cross-sectional area of the flow path.

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

Specifically, after the vehicle is powered on, the battery management controller determines whether the vehicle needs temperature adjustment. If it is determined that the vehicle needs temperature adjustment, for example, the temperature of the battery is too high, it sends information to the vehicle air-conditioning controller to enable the temperature adjustment function through CAN communication. After the vehicle air-conditioning controller turns on the temperature adjustment function, it sends heat exchange information to the battery thermal management controller. At the same time, the vehicle controller controls the second electronic valve 43 to open, and the battery thermal management controller controls the pump 51 to start at a default speed (such as a low speed). jobs.

At the same time, the battery management controller obtains the initial temperature of the battery (that is, the current temperature), the target temperature, and the target time t from the initial temperature to reach the target temperature, where the target temperature and the target time t can be preset according to the actual situation, and according to the above Formula (1) calculates the first temperature adjustment required power of the battery. The battery management controller also obtains the average current I of the battery within 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 (that is, the power required to adjust the temperature of the battery to the target temperature within the target time) according to the first temperature adjustment required power and the second temperature adjustment required power of the battery. 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.

In addition, the battery thermal management controller obtains the temperature information detected by the first temperature sensor 551 and the second temperature sensor 561, and obtains the flow velocity information detected by the flow velocity sensor 571, and calculates the temperature of the battery according to the above formula (3). Adjust the actual power P2.

Finally, the vehicle air-conditioning controller adjusts the required power P1 and the temperature-adjusted actual power P2 according to the temperature of the battery to control the output power of the compressor and the opening degree of the second expansion valve 42. Optionally, the battery thermal management controller adjusts the rotation speed of the pump 51 . For example, if the temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, then according to the difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2, the power of the compressor is increased and the opening degree of the second expansion valve 42 is increased. Optionally, increase the rotation speed of the pump 51; if the temperature adjustment required power P1 is smaller than the temperature adjustment actual power P2, the difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2 is used to reduce the power of the compressor and reduce the The opening degree of the two expansion valves 42 can selectively reduce the rotation speed of the pump 51.

For example, according to the above embodiment, it can be seen that the power required for temperature adjustment P1 is composed of two parts. When the battery needs to be cooled, assuming that the initial temperature of the battery is 45 ° C and the target temperature is 35 ° C, the battery needs to be released from 45 ° C to 35 ° C The amount of heat is fixed and can be obtained by directly calculating ΔT ₁ * C * M / t from the above formula (1), that is, the first temperature adjustment required power. At the same time, during the cooling process of the battery, there is a discharging and charging process, which generates heat. Because the battery discharge or charging current changes, this part of the heat can also be directly obtained by detecting the average battery current I, through Formula (2) is I ² * R, which directly calculates the current heating power of the battery, 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 situation of the vehicle). After the target time t required to complete the cooling is determined, the current temperature adjustment required power P1 required for battery cooling can be estimated, P1 = ΔT ₁ * C * M / t + I ² * R. If the heating function is started, the power required for temperature adjustment is P1 = ΔT ₁ * C * M / tI ² * R, that is, during the battery heating process, the larger the battery discharge or charging current, the more heating power required is the temperature. The smaller the regulation required power P1 is.

The following will describe how the vehicle air-conditioning controller adjusts the temperature of the battery 6 according to the temperature adjustment of the required power P1 and the temperature adjustment actual power P2 according to the specific embodiments. According to an embodiment of the present invention, the battery management controller is further configured to obtain a temperature of the battery. When the temperature of the battery is greater than a first temperature threshold, the temperature adjustment system enters a cooling mode, and when the temperature of the battery is less than the second temperature threshold. Value, the temperature adjustment system enters the heating mode. The first temperature critical value and the second temperature critical value can be preset according to actual conditions. The first temperature critical value is generally larger than the second temperature critical value. For example, the first temperature critical value may be 40 ° C and the second temperature critical value. The value can be 0 ° C.

Specifically, after the vehicle is powered on, the battery management controller detects the temperature of the battery immediately (the following method is applicable to both the first battery 61 and the second battery 62) and judges it. If the temperature of the battery is higher than 40 ° C, it means that the temperature of the battery is too high at this time. In order to avoid high temperature affecting the performance of the battery, the battery needs to be cooled down, the temperature adjustment system is controlled to enter the cooling mode, and the battery cooling function is sent to start Information to the car air conditioning controller. The vehicle air-conditioning controller controls the second electronic valve 43 to open after receiving the battery cooling function activation information, so that the medium and the battery perform heat exchange to reduce the temperature of the battery. As shown in Figure 3, when the temperature adjustment system works in the cooling mode, the flow directions of the medium in the first and second pipes corresponding to the circuit where the battery is located are: compressor 1-condenser 2-second electronic valve 43—the second expansion valve 42—the heat exchanger 41—the compressor 1; the heat exchanger 41—the heater 53 (closed) —the pump 51—the flow rate sensor 571—the first temperature sensor 551—the first battery 61 —The second temperature sensor 561—the medium container 52—the heat exchanger 41, and in this way, heat is exchanged at the heat exchanger 41 to achieve the cooling 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 at this time. In order to avoid the impact of the low temperature on the performance of the battery, the battery needs to be heated up. The battery heating function activates the information to the car air-conditioning controller. The vehicle air-conditioning controller controls the second electronic valve 43 to close after receiving the battery heating function activation information, and at the same time, the battery thermal management controller controls the heater 53 to turn on to provide heating power for the temperature adjustment system. When the temperature adjustment system works in the heating mode, the flow directions of the medium in the first battery 61 and the second battery 62 are respectively: heat exchanger 41-heater 53 (on)-pump 51-flow rate sensor 571-first Temperature sensor 551-first battery 61-second temperature sensor 561-medium container 52-heat exchanger 41; heat exchanger 41-heater 53 (on)-pump 51-flow rate sensor 572-first A temperature sensor 552-a second battery 62-a second temperature sensor 562-a medium container 52-a heat exchanger 41, and in this way, the temperature of the battery is raised.

Further, according to an embodiment of the present invention, when the vehicle-mounted air conditioning controller has a temperature adjustment required power greater than the actual temperature adjustment power, it obtains the power difference between the temperature adjustment required power and the temperature adjustment actual power. The air-conditioning controller increases at least one of the power of the compressor for cooling the battery and the opening degree of the valve according to the power difference, and reduces / maintains the compressor of the battery when the power required for temperature adjustment is less than or equal to the actual power for temperature adjustment At least one of power and valve opening. When in the heating mode, the battery thermal management controller increases the power of the heater for heating the battery according to the power difference, and reduces / maintains the power of the heater when the power required for temperature adjustment is less than or equal to the actual power for temperature adjustment.

Specifically, when the temperature adjustment system works in the cooling mode, the battery management controller obtains the temperature adjustment required power P1 of the battery, the battery thermal management controller obtains the actual temperature adjustment power P2 of the battery, and the vehicle air-conditioning controller adjusts the required power P1 according to the temperature adjustment And temperature adjustment actual power P2 to judge. If the temperature adjustment power P1 of the battery is greater than the actual temperature adjustment power P2, it means that if the current cooling power or medium flow rate cannot be used to cool down the battery within the target time, the vehicle air-conditioning controller obtains the battery temperature adjustment power The power difference between P1 and temperature adjustment actual power P2, and increase the power of compressor 1 according to the power difference, or increase the medium flow rate of the battery, that is, increase the opening of the second expansion valve 42 to increase the cooling power of the battery, Among them, the larger the power difference between the actual temperature adjustment power P1 and the actual temperature adjustment power P2, the more the power of the compressor 1 and the medium flow rate of the battery increase, so that the temperature of the battery is reduced to the target temperature within a preset time t. . And if the actual temperature adjustment power P1 of the battery is less than or equal to the actual temperature adjustment power P2, the vehicle air-conditioning controller can keep the power of the compressor 1 unchanged or reduce the power of the compressor 1 appropriately, or reduce the medium flow of the battery, 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 is lower than 35 ° C, the battery is cooled down, the battery management controller sends information to turn off the temperature adjustment function to the vehicle air-conditioning controller through CAN communication, and the vehicle air-conditioning controller controls the second electronic valve 43 to close. 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 vehicle air-conditioning controller appropriately increases the power of the compressor 1 so that the battery can cool down as soon as possible.

When the temperature adjustment system works in the heating mode, the battery thermal management controller obtains P1 of the battery, and the battery thermal management controller obtains the battery's temperature adjustment actual power P2. If the temperature adjustment power P1 of the battery is greater than the actual temperature adjustment power P2, it means that if the current heating power or the medium flow rate cannot complete the temperature rise of the battery within the target time, the battery thermal management controller obtains the temperature adjustment of the battery The power difference between the required power P1 and the actual power P2 is adjusted by the temperature, and the power of the heater 53 for heating the battery is increased or the medium flow of the battery is adjusted according to the power difference. For example, the speed of the pump 51 may be increased to make the The battery can complete temperature adjustment within the target time. The larger the difference between the temperature adjustment required power P1 and the temperature adjustment actual power P2, the more the power of the heater 53 and the medium flow rate of the battery circuit increase. And if the battery temperature adjustment required power P1 is less than or equal to the temperature adjustment actual power P2, the battery thermal management controller can appropriately reduce the power of the heater 53 or keep the power of the heater 53 unchanged, or adjust to reduce the battery circuit's power. Media flow to reduce the heating power of the battery. When the temperature of the battery is higher than the preset temperature, for example, 10 ° C, the battery is heated up. The battery management controller sends information to the battery thermal management controller to turn off the temperature adjustment function through CAN communication. The battery thermal management controller controls the heater 53 to turn 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, the battery thermal management controller appropriately increases the power of the heater 53 so that the battery can complete the heating as soon as possible.

According to an embodiment of the present invention, when the power required for temperature adjustment is less than or equal to the actual power for temperature adjustment, the battery thermal management controller is further configured to reduce / maintain the speed of the pump. When the power required for temperature adjustment is greater than the actual power for temperature adjustment, the battery The thermal management controller is also used to increase the speed of the pump.

Specifically, when the temperature adjustment system enters the heating mode or the cooling mode, if the temperature adjustment required power P1 of the battery is smaller than the actual temperature adjustment power P2, the battery thermal management controller controls the rotation speed of the pump 51 to be lowered, or to maintain the pump 51 The speed does not change. And if the battery temperature adjustment required power P1 is greater than the temperature adjustment actual power P2, the battery thermal management controller is also used to control the increase of the rotation speed of the pump 51, which can increase the quality of the medium flowing through the cross-sectional area of the cooling channel per unit time, thereby improving The temperature of the battery adjusts the actual power P2 to achieve temperature adjustment within the target time t. And if the battery temperature adjustment required power P1 is equal to the temperature adjustment actual power P2, then the rotation speed of the control pump 51 can be maintained at the current rotation speed.

It should be noted that the temperature adjustment system of the vehicle battery shown in FIG. 2 has a simpler structure. The actual cooling / heating power of the first battery 61 and the second battery 62 can be sensed by the temperature sensor and the flow rate of the respective branches. The device estimates that the actual cooling / heating power of the first battery 61 and the second battery 62 is the sum of the two branches.

Therefore, in the temperature adjustment system of the vehicle battery according to the embodiment of the present invention, when the battery management controller detects that the temperature difference between the water outlet temperature and the water inlet temperature of the battery exceeds a set value, it sends activation information of the battery inner loop function. After receiving the information, the vehicle air-conditioning controller forwards it to the battery thermal management controller. The battery thermal management controller controls the pump to start working, and the medium in the cooling branch is driven by the pump to make the battery temperature reach equilibrium through the medium.

FIG. 5 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a fourth embodiment of the present invention. As shown in FIG. 5, the temperature regulation system of the vehicle battery may include a plurality of cooling branches, a plurality of battery cooling branches, and a plurality of in-vehicle cooling branches.

Among them, the plurality of battery cooling branches are connected to the plurality of compressors through a plurality of valves, respectively. Each cooling branch in the vehicle includes an evaporator corresponding to the compressor and a valve connected to the evaporator.

According to an embodiment of the present invention, as shown in FIG. 5, each battery cooling branch is provided with a temperature sensor for detecting a temperature of a medium on the battery cooling branch. For example, a third temperature sensor 451 is provided on the battery cooling branch 401, and a third temperature sensor 452 is provided on the battery cooling branch 402.

Further, as shown in FIG. 5, each battery cooling branch is provided with a flow velocity sensor for detecting the flow rate of the medium on the battery cooling branch. For example, the battery cooling branch 401 is provided with a second flow rate sensor 441, and the battery cooling branch 402 is provided with a second flow rate sensor 442.

Specifically, two examples are a cooling branch, a battery cooling branch, an in-vehicle cooling branch, and a battery. The battery 6 is a first battery 61 and a second battery 62, which are connected in parallel with each other. The cooling branch is a cooling branch 111 and a cooling branch 112, and the battery cooling branch is a battery cooling branch 401 and a battery cooling branch 402. The internal cooling branch is the internal cooling branch 301 and the internal cooling branch 302, respectively. The compressor may be plural and is not related to each other. The in-vehicle cooling branch 301 may include a first electronic valve 331 and a first expansion valve 321, and the in-vehicle cooling branch 302 may include a first electronic valve 332 and a first expansion. Valve 322. The battery cooling branch 401 may include a second electronic valve 431 and a second expansion valve 421, and the battery cooling branch 402 may include a second electronic valve 432 and a second expansion valve 422.

When the battery cooling function is activated, there are two directions of refrigerant flow in each cooling branch. Taking the cooling branch 111 as an example, the direction of refrigerant flow in the cooling branch of the vehicle is: compressor 11-condenser 21-first electronic Valve 331—first expansion valve 321—evaporator 311—compressor 11; the refrigerant flow direction of the battery cooling branch is: compressor 11—condenser 21—second electronic valve 431—second expansion valve 421—second flow rate Sensor 441-third temperature sensor 451-heat exchanger 411-fourth temperature sensor 1A-compressor 11. Taking the cooling branch 112 as an example, the refrigerant flow direction of the cooling branch in the vehicle is: compressor 12-condenser 22-first electronic valve 332-first expansion valve 322-evaporator 312-compressor 12; battery cooling branch The refrigerant flow direction of the circuit is: compressor 12—condenser 22—second electronic valve 432—second expansion valve 422—second flow rate sensor 442—third temperature sensor 452—heat exchanger 412—fourth Temperature sensor 1B—compressor 12.

When the battery temperature is higher than the set value, the battery cooling function is activated, the second electronic valve 431 and the second electronic valve 432 are activated, and when the indoor air conditioner does not require cooling, the first electronic valve 331 and the first electronic valve 332 are closed. There are four media loop directions in the battery cooling pipe, as shown below: heat exchanger 411-heater 53 (closed)-pump 51-regulating valve 60-flow rate sensor 571-first temperature sensor 551 — First battery 61 — Second temperature sensor 561 — Medium container 52 — Heat exchanger 411. Heat exchanger 411—heater 53 (closed) —pump 51—regulating valve 601—flow rate sensor 572—first temperature sensor 552—second battery 62—second temperature sensor 562—media container 52— Heat exchanger 411. Heat exchanger 412-heater 53 (closed)-pump 51-regulating valve 60-flow rate sensor 571-first temperature sensor 551-first battery 61-second temperature sensor 561-medium container 52- Heat exchanger 412. Heat exchanger 412—heater 53 (closed) —pump 51—regulating valve 601—flow rate sensor 572—first temperature sensor 552—second battery 62—second temperature sensor 562—media container 52— Heat exchanger 412.

When the battery temperature is lower than the set value, the battery heating function is activated, the second electronic valve 431 and the second electronic valve 432 are closed, and the heater 53 is activated. There are four media loop directions in the battery cooling pipe, as shown below: heat exchanger 411-heater 53 (start)-pump 51-regulating valve 60-flow rate sensor 571-first temperature sensor 551 — First battery 61 — Second temperature sensor 561 — Medium container 52 — Heat exchanger 411. Heat exchanger 411-heater 53 (start)-pump 51-regulating valve 601-flow rate sensor 572-first temperature sensor 552-second battery 62-second temperature sensor 562-medium container 52- Heat exchanger 411. Heat exchanger 412-heater 53 (start)-pump 51-regulating valve 60-flow rate sensor 571-first temperature sensor 551-first battery 61-second temperature sensor 561-medium container 52- Heat exchanger 412. Heat exchanger 412-heater 53 (start)-pump 51-regulating valve 601-flow rate sensor 572-first temperature sensor 552-second battery 62-second temperature sensor 562-medium container 52- Heat exchanger 412.

In an embodiment of the present invention, the battery temperature adjustment module 5 may further include a controller, wherein the controller may include a pool management controller, a battery thermal management controller, and a vehicle air-conditioning controller.

The vehicle air-conditioning controller estimates the cooling power of the battery cooling circuit 401 through the third temperature sensor 451, the fourth temperature sensor 1A, and the second flow rate sensor 441, and can use the third temperature sensor 452 and the fourth temperature The sensor 1B and the second flow rate sensor 442 estimate the cooling power of the battery cooling branch 402. The vehicle air-conditioning controller can control the refrigerant flow of the battery cooling branch 401 through the second electronic valve 431 and the second expansion valve 421, and control the refrigerant flow of the battery cooling branch 402 through the second electronic valve 432 and the second expansion valve 422, thereby The cooling powers of the battery cooling branch branch 1 and the battery cooling branch branch 2 are controlled.

The vehicle air-conditioning controller also detects the air temperature in each area of the cabin, and can adjust the power distribution of each cooling branch to the battery cooling branch according to the temperature difference in each area and the system's thermal management power requirements, thereby balancing the regional air temperature.

For example, as shown in FIG. 6, it is assumed that both the air outlet 1 and the air outlet 2 are provided with cooling power by the cooling branch 1, and the air outlet 3 and the air outlet 4 are provided with cooling power by the cooling branch 2. When the battery cooling function is activated, if the vehicle air-conditioning controller detects that the temperature near the air outlet 1 and the air outlet 2 is higher than the temperature in the area where the air outlet 3 and the air outlet 4 are located, and the difference is large, the car air-conditioning controller can control The opening degree of the first expansion valve 321 is increased, and the opening degree of the second expansion valve 421 is decreased, so that the cooling power of the in-vehicle cooling branch 301 in the cooling branch 111 is increased, and the cooling power of the battery cooling branch 401 is reduced. At the same time, in order to ensure that the cooling power of the battery does not change, the vehicle air-conditioning controller can control the opening degree of the first expansion valve 322 to decrease and the opening degree of the second expansion valve 422 to increase, thereby making the cooling branch in the vehicle in the cooling branch 112 The cooling power of 302 decreases, and the cooling power of battery cooling branch 402 increases. In this way, the temperature in each area of the compartment can be balanced, and at the same time, the cooling power requirements of the battery can be met.

As a specific example, the battery manager detects the temperature information of the power battery pack in real time. When the battery temperature is higher than the set value, the battery cooling function start information is sent to the vehicle air-conditioning controller through CAN communication. When the battery temperature reaches the set value of the cooling end, the battery cooling function end information is sent. When the battery temperature is lower than the set value, the battery heating function start information is sent to the vehicle air-conditioning controller through CAN communication. When the battery temperature reaches the set value of the heating end, the battery heating function end information is sent. The battery management controller can estimate the current heating value of the battery through the current discharge / charge current of the battery, and estimate the actual cooling / heating efficiency of the system based on the difference between the current average temperature of the two batteries and the target temperature of the battery. The battery heating / cooling power information is required for the vehicle air-conditioning controller.

The battery management controller detects the water temperature information of the third temperature sensor 452, the third temperature sensor 451, the fourth temperature sensor 1B, and the fourth temperature sensor 1A in real time, and detects the second flow rate sensor in real time. The flow rate information of 441 and the second flow rate sensor 442 are used to estimate the cooling power of the battery cooling branch 401 and the battery cooling branch 402. When the temperature difference in the area near each air outlet in the cabin is large, it is necessary to adjust the cooling capacity distribution of the cooling branch branch in the cabin. At this time, by adjusting the opening degrees of the first expansion valve 321, the first expansion valve 322, the second expansion valve 421, and the second expansion valve 422, the cooling of the cooling branch in the vehicle and the branch of the battery cooling branch can be redistributed. Power distribution. When adjusting the cooling power allocated by the cooling branch 111 and the cooling branch 112 to the battery cooling branch branch, the vehicle air conditioner first adjusts the opening degree of the expansion valve. After the adjustment is completed, the vehicle air conditioning controller estimates each battery cooling branch branch. The cooling power of the circuit is determined whether it has been adjusted in place. If the battery cooling branch branch power has not reached the target value, then continue to adjust the opening of the expansion valve.

The battery thermal management controller detects the temperature of the water inlet of the first battery 61 through the first temperature sensor 551, detects the temperature of the water outlet of the first battery 61 through the second temperature sensor 561, and calculates the temperature difference between the water inlet and the outlet. The flow velocity sensor 571 can measure the flow velocity of the medium in the cooling branch branch of the first battery 61, and estimates the current actual cooling / heating power of the cooling branch branch of the first battery through the above three parameters. The battery thermal management controller detects the temperature of the water inlet of the second battery 62 through the second temperature sensor 552, and detects the temperature of the water outlet of the second battery 62 through the second temperature sensor 562, and calculates the temperature difference between the water inlet and the outlet. The flow velocity sensor 572 measures the flow velocity of the medium in the cooling branch branch of the second battery 62, and estimates the current actual cooling / heating power of the cooling branch branch of the second battery 62 through the above three parameters. The battery thermal management controller may control the openings of the regulating valve 60 and the regulating valve 601 according to the battery temperature conditions of the first battery 61 and the second battery 62 to control the cooling branch branches of the first battery 61 and the second battery 62. The medium flow rate is distributed, so as to control the battery temperature balance of the first battery 61 and the second battery 62.

When the vehicle needs to be cooled, if the temperature of the first battery 61 is higher than the temperature of the second battery 62, the opening degree of the regulating valve 60 can be increased and the opening degree of the regulating valve 601 can be reduced. When the average temperature of 62 is equal, the openings of the control valve 60 and the control valve 601 can be controlled to keep the temperature of the two batteries balanced.

It should be noted that, for details not disclosed in the temperature regulation system of the vehicle battery shown in FIG. 5, please refer to the details disclosed in the temperature regulation system of the vehicle battery shown in FIG. 1. To avoid redundancy, no longer here Elaborate.

Therefore, the temperature adjustment system of the vehicle battery in the embodiment of the present invention can provide cooling power for the battery car at the same time. The cooling power of the system is provided by the vehicle air conditioner, and the cooling capacity is shared with the vehicle cooling system, which is beneficial to reducing the battery thermal management system volume. , The distribution of cooling capacity is more flexible, not only can meet the cooling power requirements in the compartment, but also meet the cooling needs of power batteries. At the same time, the battery thermal management function is centrally controlled by the battery thermal management controller. The battery thermal management controller determines the heating or cooling power required by the system through water temperature, flow rate, power battery parameters, and vehicle air-conditioning operating conditions, and controls the air-conditioning refrigerant flow distribution. The cooling capacity of the control system and the vehicle air conditioner is reasonably distributed, so that the needs for cooling in the car and battery cooling can be met at the same time.

FIG. 7 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a fifth embodiment of the present invention. As shown in FIG. 7, the temperature regulation system of the vehicle battery may include a plurality of refrigeration branches, a battery cooling branch 4, and a battery temperature adjustment module 5. Among them, each refrigeration branch can include a compressor and a condenser, and a plurality of refrigeration branch machines are connected to the battery cooling branch 4.

According to an embodiment of the present invention, as shown in FIG. 7, the plurality of compressors 1 are connected to the battery cooling branch 4 through a valve (a second electronic valve 43 and a second expansion valve 42).

Specifically, the two compressors are connected in parallel, and the refrigerant loop circuit of the compressor 11 is: compressor 11-condenser 21-second electronic valve 43-second expansion valve 42-heat exchanger 41-compressor 11. The refrigerant loop circuit of the compressor 12 is: the compressor 12-the condenser 22-the second electronic valve 43-the second expansion valve 42-the heat exchanger 41-the compressor 12.

In addition, as shown in FIG. 8, the plurality of compressors 1 may share a single condenser 2. Among them, the refrigerant flow direction of the compressor 11 is: compressor 11-condenser 2-second electronic valve 43-second expansion valve 42-heat exchanger 41-compressor 11. The refrigerant loop circuit of the compressor 12 is: the compressor 12-the condenser 2-the second electronic valve 43-the second expansion valve 42-the heat exchanger 41-the compressor 12.

In addition, as shown in FIG. 9, the temperature regulation system of the vehicle battery may further include a plurality of internal cooling branch circuits. When the battery cooling function is activated, the refrigerant in each refrigeration branch has two directions of flow, taking refrigeration branch 1 (the refrigeration branch including compressor 11) as an example. The internal cooling branch branch 1 is: compressor 11—condenser 21—first electronic valve 331—first expansion valve 321—evaporator 311—compressor 11; the battery cooling branch branch 1 is: compressor 11—condensation Heater 21-second electronic valve 43-second expansion valve 42-heat exchanger 41-compressor 11. Taking the refrigeration branch 2 (the refrigeration branch including the compressor 12) as an example, the cooling branch branch 2 in the vehicle is: compressor 12-condenser 22-first electronic valve 332-first expansion valve 322-evaporator 312 —Compressor 12; battery cooling branch branch 2 is: compressor 12—condenser 22—second electronic valve 43—second expansion valve 42—heat exchanger 41—compressor 12.

Among them, as shown in FIG. 10, the plurality of evaporators can also share an electronic valve and an expansion valve to be connected to the plurality of compressors, and the flow direction of the refrigerant will not be described in detail here.

According to another embodiment of the present invention, as shown in FIG. 11, the plurality of compressors 1 are connected to the battery cooling branch 4 through a plurality of electronic valves, respectively.

Specifically, the refrigerant loop circuit of the compressor 11 is: the compressor 11-the condenser 21-the second electronic valve 431-the second expansion valve 421-the heat exchanger 41-the compressor 11. The refrigerant loop circuit of the compressor 12 is: the compressor 12-the condenser 22-the second electronic valve 432-the second expansion valve 422-the heat exchanger 41-the compressor 12.

Similarly, as shown in FIG. 13, the temperature regulation system of the vehicle battery may further include a plurality of internal cooling branch circuits.

According to another embodiment of the present invention, as shown in FIG. 12, the temperature regulation system of the vehicle battery may further include a first three-way valve 47 and a second three-way valve 48. Among them, a plurality of compressors are connected to the battery cooling branch 4 through a first three-way valve 47, and a plurality of compressors are connected to the vehicle cooling branch through a second three-way valve 48.

Compared with the temperature adjustment system of the on-board battery of the above embodiment (Fig. 9), the plurality of refrigeration branches are connected to one interior cooling branch, and the three-way valve is used instead of the electronic valve. Its working principle is the same as that in the above embodiment, and will not be repeated here.

In summary, according to the temperature adjustment system of the vehicle battery in the embodiment of the present invention, the controller adjusts the temperature of the battery by controlling the battery temperature adjustment module. Therefore, the system can adjust the temperature when the temperature of the vehicle battery is too high or too low, so as to maintain the temperature of the vehicle battery in a preset range, and avoid the situation that the performance of the vehicle battery is affected by the temperature.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear "," left "," right "," vertical "," horizontal "," top "," bottom "," inside "," outside "," clockwise "," counterclockwise "," axial ", The azimuth or position relationship indicated by "radial", "circumferential", etc. is based on the azimuth or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply the device or element referred to. It must have a specific orientation and be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, for example, two, three, etc., unless it is specifically and specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and other terms shall be understood in a broad sense unless otherwise specified and defined, for example, they may be fixed connections or removable connections , Or integrated; it can be mechanical or electrical; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of the two elements or the interaction between the two elements, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless explicitly stated and defined otherwise, the first feature "on" or "down" of the second feature may be the first and second features in direct contact, or the first and second features indirectly through an intermediate medium. contact. Moreover, the first feature is "above", "above", and "above" the second feature. The first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in level than the second feature. The first feature is “below”, “below”, and “below” of the second feature. The first feature may be directly below or obliquely below the second feature, or it may simply indicate that the first feature is less horizontal than the second feature.

In the description of this specification, the description with reference to the terms “an embodiment”, “some embodiments”, “examples”, “specific examples”, or “some examples” and the like means specific features described in conjunction with the embodiments or examples , Structures, materials, or features are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without any contradiction, those skilled in the art may combine and combine different embodiments or examples and features of the different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present invention. Those skilled in the art can interpret the above within the scope of the present invention. Embodiments are subject to change, modification, substitution, and modification.

1, 11, 12‧‧‧ compressor

1A, 1B‧‧‧ Fourth temperature sensor

2, 21, 22‧‧‧ condenser

3.301, 302‧‧‧‧Cooling branch in the car

4, 401, 402‧‧‧ battery cooling branch

5‧‧‧Battery temperature adjustment module

10, 111, 112‧‧‧ Refrigeration branch

31,311,312‧‧‧‧Evaporator

32, 321, 322‧‧‧The first expansion valve

33, 331, 332‧‧‧‧The first electronic valve

41,411,412‧‧‧‧Heat exchanger

42, 421, 422‧‧‧ Second expansion valve

43, 431, 432‧‧‧Second electronic valve

47‧‧‧The first three-way valve

48‧‧‧Second Three-Way Valve

51‧‧‧Pump

52‧‧‧medium container

53‧‧‧heater

55, 551, 552‧‧‧ first temperature sensor

56,561, 562‧‧‧Second temperature sensor

58,508‧‧‧Total temperature sensor

59‧‧‧Total flow sensor

60, 601‧‧‧ regulating valve

61‧‧‧first battery

62‧‧‧ secondary battery

100‧‧‧car air conditioning module

441, 442‧‧‧Second flow velocity sensor

451, 452‧‧‧ Third temperature sensor

571, 572‧‧‧ velocity sensor

The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments with reference to the accompanying drawings, where FIG. 1 is a temperature of a vehicle battery according to a first embodiment of the present invention Schematic diagram of the structure of the regulation system; FIG. 2 is a diagram of the structure of the temperature regulation system of the vehicle battery according to the second embodiment of the present invention; FIG. 3 is the structure of the temperature regulation system of the vehicle battery according to the third embodiment of the present invention 4 is a schematic diagram of the working principle of a controller according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a fourth embodiment of the present invention; FIG. 6 is a diagram according to the present invention A schematic diagram of the distribution positions of the air outlets of an embodiment; FIG. 7 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a fifth embodiment of the present invention; FIG. 8 is a temperature diagram of a vehicle battery according to a sixth embodiment of the present invention Schematic diagram of the structure of the adjustment system; FIG. 9 is a diagram of the structure of the temperature adjustment system of the vehicle battery according to the seventh embodiment of the present invention; FIG. Is a schematic structural diagram of a temperature adjustment system of a vehicle-mounted battery according to an eighth embodiment of the present invention; FIG. 11 is a schematic structural diagram of a temperature adjustment system of a vehicle-mounted battery according to a ninth embodiment of the present invention; FIG. 13 is a schematic structural diagram of a temperature adjustment system for a vehicle-mounted battery according to a tenth embodiment of the present invention; FIG. 13 is a schematic structural diagram of a temperature adjustment system for a vehicle-mounted battery according to an eleventh embodiment of the present invention.

Claims (17)

A vehicle battery temperature regulating system is characterized by comprising: a vehicle air-conditioning module, the vehicle air-conditioning module comprising a refrigeration branch and a battery cooling branch connected in series with the refrigeration branch, wherein the refrigeration branch It includes a compressor and a condenser connected to the compressor. The battery cooling branch includes a heat exchanger and a valve connected to the heat exchanger. The battery cooling branch is connected to the battery cooling branch to form a heat exchange flow path. A battery temperature adjustment module, wherein the battery temperature adjustment module includes a medium container, a pump, and a plurality of temperature adjustment branches connected in parallel with the medium container and the pump, and the plurality of temperature adjustment branches connected in parallel with each other And a plurality of batteries connected in parallel; a controller, which is connected to the vehicle air-conditioning module and a battery temperature adjustment module, for adjusting the temperature of the battery. The temperature adjustment system for a vehicle battery according to item 1 of the patent application scope, further comprising: a battery status detection module connected to the battery, and the battery status detection module is configured to detect a current of the battery. The temperature adjustment system for a vehicle battery according to item 1 of the scope of the patent application, wherein each of the temperature adjustment branches includes: a first temperature sensor for detecting an inlet temperature of a medium flowing into the battery; Two temperature sensors are used to detect the outlet temperature of the medium flowing out of the battery; and a flow rate sensor is used to detect the flow rate of the medium in the heat exchange flow path. The temperature adjustment system for a vehicle battery according to item 1 of the patent application scope, wherein the battery temperature adjustment module further includes: a heater, the heater is connected to the controller, and is used for heating the heat exchange channel. medium. The temperature adjustment system for an on-board battery according to item 1 of the scope of the patent application, wherein the battery temperature adjustment module further includes: a total flow rate sensor connected to the pump for detecting the inflow of a plurality of the temperature adjustment branches. The total flow rate of the medium in the heat exchange flow path. The temperature adjustment system for an on-board battery according to item 1 of the scope of patent application, wherein the battery temperature adjustment module further comprises: a total temperature sensor connected to the medium container, for detecting the medium flowing out of the plurality of batteries. Total outlet temperature. The temperature regulation system for a vehicle battery according to item 4 of the scope of patent application, wherein the controller includes: a battery management controller, a battery thermal management controller, and a vehicle air-conditioning controller, wherein the battery management controller It is connected with the battery status detection module and used to obtain a temperature adjustment required power of the battery; the battery thermal management controller and the pump, a first temperature sensor, a second temperature sensor, a flow rate sensor The tester is connected to a heater for obtaining a temperature-adjusted actual power of the battery, and adjusting the power of the heater according to the temperature-adjusted required power and the temperature-adjusted actual power to adjust the temperature of the battery; the The vehicle air-conditioning controller is connected to the compressor and a valve, and is used to adjust the power of the compressor according to the temperature adjustment required power and the temperature adjustment actual power to adjust the temperature of the battery. The temperature adjustment system for a vehicle battery according to item 7 of the scope of patent application, wherein the battery management controller is further configured to obtain the temperature of the battery, and the temperature adjustment is performed when the temperature of the battery is greater than a first temperature threshold. The system enters a cooling mode, and when the temperature of the battery is less than a second temperature threshold, the temperature adjustment system enters a heating mode. The temperature adjustment system for a vehicle battery according to item 8 of the scope of the patent application, wherein the vehicle air conditioner controller obtains the temperature adjustment required power and the temperature adjustment actual power when the temperature adjustment required power is greater than the temperature adjustment actual power. A power difference between the two; when in the cooling mode, the vehicle air-conditioning controller increases at least one of the power of the compressor for cooling the battery and the opening degree of the valve according to the power difference, and the temperature adjustment demand When the power is less than or equal to the actual power adjusted by the temperature, at least one of the power of the battery compressor and the opening of the valve is reduced / maintained; when in the heating mode, the battery thermal management controller increases according to the power difference The power of the heater for heating the battery, and the power of the heater is reduced / maintained when the temperature adjustment required power is less than or equal to the temperature adjustment actual power. According to the temperature regulation system for a vehicle battery according to item 9 of the scope of patent application, wherein when the power required for the temperature regulation is less than or equal to the actual power for the temperature regulation, the battery thermal management controller is further configured to reduce / maintain the pump Speed; when the power required for the temperature adjustment is greater than the actual power for the temperature adjustment, the battery thermal management controller is also used to increase the speed of the pump. The temperature adjustment system for a vehicle battery according to item 1 of the scope of patent application, wherein the vehicle air-conditioning module further includes an internal cooling branch in series with the cooling branch and in parallel with the battery cooling branch. The temperature adjustment system for an on-board battery according to item 1 of the scope of patent application, wherein the heat exchanger is a plate heat exchanger. The temperature regulation system for an on-board battery according to item 1 of the scope of patent application, wherein the refrigeration branch is plural, the battery cooling branch is plural, and the plurality of battery cooling branches are connected to the plurality of compressors through a plurality of valves, respectively. . The temperature adjustment system for an on-board battery according to item 1 of the scope of the patent application, wherein the in-vehicle cooling branch is plural, and each of the in-vehicle cooling branches includes an evaporator corresponding to the compressor and one Valve connected to the evaporator. According to the temperature adjustment system for a vehicle battery according to item 13 of the scope of the patent application, wherein each battery cooling branch is provided with a temperature sensor for detecting the temperature of the medium on the battery cooling branch. According to the temperature regulation system of the vehicle battery according to item 13 of the scope of the patent application, each of the battery cooling branches is provided with a flow velocity sensor for detecting the flow rate of the medium on the battery cooling branch. According to the temperature adjustment system for a vehicle battery according to item 1 of the scope of the patent application, the refrigeration branch is plural, the battery cooling branch is one, and the plurality of refrigeration branch machines are connected to the battery cooling branch.