WO2019062937A1 - Système de régulation de température pour batterie embarquée - Google Patents

Système de régulation de température pour batterie embarquée Download PDF

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Publication number
WO2019062937A1
WO2019062937A1 PCT/CN2018/108735 CN2018108735W WO2019062937A1 WO 2019062937 A1 WO2019062937 A1 WO 2019062937A1 CN 2018108735 W CN2018108735 W CN 2018108735W WO 2019062937 A1 WO2019062937 A1 WO 2019062937A1
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WO
WIPO (PCT)
Prior art keywords
battery
temperature
vehicle
cooling
power
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Application number
PCT/CN2018/108735
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English (en)
Chinese (zh)
Inventor
伍星驰
谈际刚
王洪军
Original Assignee
比亚迪股份有限公司
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Publication of WO2019062937A1 publication Critical patent/WO2019062937A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6572—Peltier elements or thermoelectric devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of automotive technology, and in particular, to a temperature regulation system for a vehicle battery.
  • 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. .
  • 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 it cannot be heated according to the actual condition of the vehicle battery.
  • the power and cooling power are precisely controlled so that the temperature of the vehicle battery cannot be maintained within the preset range.
  • the present application aims to solve at least one of the technical problems in the related art to some extent.
  • an object of the present application 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 that the temperature of the vehicle battery is maintained within a preset range, thereby avoiding the occurrence of temperature. Affects the performance of the car battery.
  • an embodiment of the present application provides a temperature adjustment system for a vehicle battery, including: a vehicle air conditioner module, the vehicle air conditioner module includes a cooling branch and a battery cooling branch connected in series with the cooling branch.
  • the refrigeration branch includes a compressor and a condenser connected to the compressor, the battery cooling branch including a valve connected to the heat exchanger and the heat exchanger; and the battery cooling branch a battery temperature adjustment module connected to form a heat exchange flow path, wherein the battery temperature adjustment module includes a medium container, a pump, and a plurality of mutually connected temperature adjustment branches connected to the medium container and the pump,
  • the mutually parallel temperature adjustment branches are respectively connected to the plurality of parallel batteries; the controller is connected to the vehicle air conditioning module and the battery temperature adjustment module for adjusting the temperature of the battery.
  • 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 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.
  • thermo adjustment system of the vehicle battery may further have the following additional technical features:
  • the temperature adjustment system of the vehicle battery further includes: a battery state detecting module connected to the battery, wherein the battery state detecting module is configured to detect a current of the battery.
  • each of the temperature adjustment 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 medium flowing out of the battery An outlet temperature; a flow rate sensor for detecting a flow rate of the medium in the heat exchange flow path.
  • the battery temperature adjustment module further includes: a heater connected to the controller for heating a medium in the heat exchange flow path.
  • the battery temperature adjustment module further includes: a total flow rate sensor connected to the pump for detecting a total flow rate of the medium flowing into the heat exchange passages of the plurality of temperature adjustment branches .
  • 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.
  • the controller includes: a battery management controller, a battery thermal management controller, and a vehicle air conditioning controller, wherein the battery management controller is coupled to the battery state detecting module for acquiring The required power for temperature regulation of the battery; the battery thermal management controller is coupled to the pump, the first temperature sensor, the second temperature sensor, the flow rate sensor, and the heater for obtaining temperature adjustment of the battery Actual power, and adjusting the power of the heater according to the required power and the actual power to adjust the temperature of the battery; the vehicle air conditioning controller is connected to the compressor and the valve for The power of the compressor is adjusted based on the demand power and the actual power to adjust the temperature of the battery.
  • the battery management controller is further configured to acquire 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, the temperature adjustment system enters the heating mode.
  • the vehicle air conditioner controller acquires a power difference between the required power and the actual power when the required power is greater than the actual power; when in a cooling mode, The vehicle air conditioner controller increases at least one of a power of the compressor for cooling the battery and an opening degree of the valve according to the power difference, and decreases when the required power is less than or equal to the actual power Holding at least one of a power of a compressor of the battery and an opening of the valve; when in a heating mode, the battery thermal management controller increases a heater for heating the battery according to the power difference And the power of the heater is reduced/held when the required power is less than or equal to the actual power.
  • the battery thermal management controller is further configured to reduce/maintain a rotational speed of the pump when the required power is less than or equal to the actual power; and the required power is greater than the actual
  • the battery thermal management controller is also used to increase the rotational speed of the pump.
  • the onboard 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.
  • the heat exchanger is a plate heat exchanger.
  • the plurality of cooling branches are plural, and the plurality of battery cooling branches are connected, and the plurality of battery cooling branches are respectively connected to the plurality of compressors through a plurality of valves.
  • 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. .
  • each of the battery cooling branches is provided with a temperature sensor for detecting the temperature of the medium on the battery cooling branch.
  • each of the battery cooling branches is provided with a flow rate sensor for detecting a flow rate of the medium on the battery cooling branch.
  • the plurality of cooling branches are one, and the battery cooling branch is one, and the plurality of cooling branches are connected to the battery cooling branch.
  • FIG. 1 is a schematic structural view of a temperature adjustment system of a vehicle battery according to a first embodiment of the present application
  • FIG. 2 is a schematic structural view of a temperature adjustment system of a vehicle battery according to a second embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a third embodiment of the present application.
  • FIG. 4 is a schematic diagram of a working principle of a controller according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a fourth embodiment of the present application.
  • FIG. 6 is a schematic view showing a distribution position of an air outlet according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a fifth embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a sixth embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a seventh embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to an eighth embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a ninth embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a tenth embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to an eleventh embodiment of the present application.
  • the temperature regulation system of the vehicle battery may include: a vehicle air conditioner module 100, a battery temperature adjustment module 5, and a controller 7.
  • the vehicle air conditioning module 100 may include a cooling branch 10 and a battery cooling branch 4 connected in series with the cooling branch 10, wherein the cooling branch 10 includes a compressor 1 and a condenser 2 connected to the compressor 1, and the battery is cooled.
  • the branch 4 may include a valve that is coupled to the heat exchanger 41 and to the heat exchanger 4.
  • the battery temperature adjustment module 5 is connected to the battery cooling branch 4 to form a heat exchange flow path, wherein 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 adjustment branch, a plurality of mutually parallel temperature adjustment branches are respectively connected to a plurality of parallel batteries.
  • the controller 7 is connected to the vehicle air conditioner 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 positive temperature coefficient, generally refers to a semiconductor material or component with a large positive temperature coefficient), and the heat exchanger may be 41 can be a plate heat exchanger.
  • 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
  • the pipes are arranged independently of each other so that the medium (media such as refrigerant, water, oil, air, or phase change material or other chemicals) is independent of each other.
  • 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.
  • the vehicle air conditioner is only used to cool the battery, and the temperature adjustment system can also cool both the cabin and the battery through the vehicle air conditioner.
  • the car air conditioning module 100 may further include a series connection with the cooling branch 10 and a battery cooling branch 4 Parallel in-vehicle cooling branch 3.
  • the in-vehicle cooling branch 3 may include an evaporator 31, a first expansion valve 32, and a first electronic valve 33.
  • the interior of the vehicle air conditioner is divided into two independent cooling branches from the condenser 2, which are an in-vehicle cooling branch 3 and a battery cooling branch 4, respectively, and the in-vehicle cooling branch 3 is in the cabin through its evaporator 31.
  • the space provides refrigeration power
  • the battery cooling branch 4 provides cooling power to the battery cooling through its heat exchanger 41.
  • the temperature of the battery is too high, the battery cooling function is started, and the flow direction of the medium 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. Therefore, the temperature 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 within a preset range, thereby avoiding the situation that the performance of the vehicle battery is affected by the temperature, and also the temperature of the battery. When the requirements are met, the temperature inside the vehicle is made to meet the demand.
  • a plurality of mutually connected temperature adjustment branches respectively adjust the temperature of the corresponding battery.
  • 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, and 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.
  • the battery cooling branch 4 supplies cooling power to the battery 6 mainly through a heat exchanger 41 such as a plate heat exchanger.
  • 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 for controlling the opening and closing of the battery cooling branch 4
  • the second expansion valve 42 is for controlling the flow rate of the refrigerant of the battery cooling branch 4.
  • 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 Independent adjacent settings.
  • the physical position of the heat exchanger 41 can be located in the branch of the vehicle air conditioner compressor 1 to facilitate the commissioning of the vehicle air conditioner, and the vehicle air conditioner can be separately supplied and assembled, and at the same time, the vehicle air conditioner is installed. Only one medium (refrigerant) needs to be added during the process.
  • the physical position of the heat exchanger 41 can also be located in the branch where the battery is located, and the physical position of the heat exchanger 41 can also be set independently of the branch where the vehicle air conditioner compressor 1 is located and the branch where the battery is located.
  • the second electronic valve 43 needs to be closed first, and then the refrigerant is added, and after being installed in the vehicle, The battery is connected to the battery temperature adjustment module 5, the second electronic expansion valve 43 is opened, and the refrigerant is again vacuumed to perform normal operation.
  • the heat exchanger 41 may not be disposed in the battery cooling branch 4.
  • the refrigerant flowing in the battery cooling branch 4 is the refrigerant.
  • the refrigerant flowing in the first pipe of the battery cooling branch 4 is the refrigerant
  • the medium flowing in the second pipe is the refrigerant
  • the refrigerant flowing in the cooling branch 3 in the vehicle is the refrigerant.
  • the above-mentioned temperature regulation 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 the current of the battery.
  • the battery state detecting module may be a current sensor.
  • each of the temperature adjustment branches 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 for detecting the inlet temperature of the medium flowing into the battery
  • the second temperature sensor is for detecting the outlet temperature of the medium flowing out of the battery
  • the flow rate sensor is for detecting the medium in the heat exchange flow path. Flow rate.
  • the battery temperature adjustment module 5 further includes: a heater 53 connected to the controller 7 for heating the medium in the heat exchange flow path.
  • 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 respective portions connected in series are not limited, wherein the flow rate sensor is disposed on the series circuit, the first temperature sensor It is disposed at the inlet of the cooling flow path of the battery, and the second temperature sensor is disposed at the outlet of the cooling flow path of the battery.
  • 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
  • the first temperature sensor is disposed at the inlet of the cooling flow path of the battery 6 (first end)
  • the medium container 52 is connected to the second end of the cooling flow path of the battery 6
  • the second temperature sensor is disposed at the outlet (second end) of the cooling flow path of the battery 6 for The outlet temperature of the medium of the battery is detected
  • the flow rate sensor is disposed at the outlet of the cooling flow path of the battery 6 for detecting the flow rate of the medium of the battery 6.
  • 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 for detecting the inflow of the plurality of temperature adjustment branches, respectively.
  • the battery temperature adjustment module 5 may further include: a total temperature sensor 58 connected to the medium container 53, for detecting a total outlet of the medium flowing out of the plurality of batteries. temperature.
  • each of the temperature adjustment branches may further include a regulating valve, and the opening degrees of the regulating valve 60 and the regulating valve 601 are required by the first battery 61 and the second battery 62.
  • the cooling power is determined, the regulating valve 60 is used to control the cooling flow rate of the cooling branch of the first battery 61, and the regulating valve 601 is used to control the cooling flow rate of the cooling branch of the second battery 62.
  • the battery cooling function is activated, at which time the second electronic valve 43 is opened, and the medium circulation direction in the battery has two directions
  • the direction 1 the heat exchanger 41-heating The device 53 (closed) - the pump 51 - the regulating valve 60 - 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.
  • 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 - Media container 52 - Heat exchanger 41.
  • the flow direction of the medium in the battery cooling duct 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 battery 61 - The second temperature sensor 561 - the medium container 52 - the 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 in a parallel relationship.
  • the controller 7 may include: a battery management controller 71, a battery thermal management controller 72, and a vehicle air conditioner controller 73, wherein the battery management controller 71 and the battery status
  • the detection module is connected to obtain the required power P1 of the battery
  • the battery thermal management controller 72 is connected to the pump 51, the first temperature sensor, the second temperature sensor, the flow rate sensor and the heater 53, for acquiring the actual power P2 of the battery.
  • the power of the heater 53 is adjusted according to the required power P1 and the actual power P2 to adjust the temperature of the battery.
  • the vehicle air conditioner controller 73 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) for compressing according to the required power P1 and the actual power P2.
  • the power of the machine 1 is adjusted to adjust the temperature of the battery.
  • the battery management controller 71 may include, for example, a DSP chip having a battery management function.
  • Battery thermal management controller 72 may, for example, include a DSP chip with battery thermal management functionality.
  • the vehicle air conditioner controller 73 may include, for example, a vehicle air conditioner DSP chip.
  • the battery thermal management controller 72 may be coupled to 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 572, with the pump 51 and the heater 53 performs CAN (Controller Area Network) communication, and obtains the actual power P2, controls the rotation speed of the pump 51, and controls 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. power.
  • CAN Controller Area Network
  • the battery management controller 71 collects the current flowing through the battery, the temperature of the battery itself, and obtains the required power P1 according to the target temperature of the battery, the target time t, the specific heat capacity C of the battery, the mass M of the battery, and the internal resistance R of the battery, and The vehicle air conditioner controller 73 is controlled to start or stop working.
  • the vehicle air conditioner controller 73 is connected to the expansion valve and the electronic valve, and the vehicle air conditioner controller 73 can perform CAN communication with the battery management controller 71 and the battery thermal management controller 72 and the compressor 1 to be acquired according to the battery management controller 71.
  • the required power P1 and the actual power P2 obtained by the battery thermal management controller 72 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 battery thermal management controller 72 can detect the total inlet temperature through the total temperature sensor 508, detect the total outlet temperature through the total temperature sensor 58, calculate the temperature difference between the inlet and outlet, and measure the flow rate of the total branch of the medium through the total flow sensor 59.
  • the current actual cooling/heating power of the battery cooling total branch is estimated by the above three parameters.
  • the battery thermal management controller 72 can control whether the heater 53 operates by CAN communication, and adjust the heating power of the heater 53.
  • the battery thermal management controller 72 controls the operating state of the pump 51 via the CAN line to control the battery medium flow rate.
  • the battery thermal management controller 72 checks the water inlet temperature of the first battery 61 through the first temperature sensor 551, detects the water outlet temperature of the first battery 61 through the second temperature sensor 561, calculates the temperature difference between the inlet and outlet, and measures the flow rate sensor 571.
  • the flow rate of the medium in the cooling branch of a battery 61 is estimated by the above three parameters for the actual cooling/heating power of the cooling branch of the first battery 61.
  • the actual cooling/heating power of the cooling branch of the second battery 62 is estimated in the same manner.
  • the battery thermal management controller 72 can control the opening degrees of the regulating valve 60 and the regulating valve 601 to control the two cooling branches of the first battery 61 and the second battery 62 according to the battery temperature conditions of the first battery 61 and the second battery 62.
  • the medium flow is distributed so as to control the battery temperature balance between the first battery 61 and 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 first battery 61 and the first battery
  • the opening degrees of the regulating valve 60 and the regulating valve 601 can be controlled to maintain the temperature balance of the two batteries.
  • the battery thermal management controller 72 can control the heater 53 to operate and adjust the heating power of the heater through the CAN communication.
  • the heater 53 receives the battery heating function startup information sent by the battery thermal management controller 72, the battery is started to operate.
  • the thermal management controller 72 transmits the battery heating power demand in real time, and the heater 53 adjusts the output power according to the heating power demand.
  • the battery thermal management controller 72 can also control the working state of the pump through CAN communication, thereby controlling the flow rate of the battery medium and the flow direction of the medium, and when receiving the pump 51 startup information sent by the battery thermal management controller 72, starts working, and The speed and flow rate are adjusted based on the flow information sent by the battery thermal management controller 72.
  • the battery thermal management controller 72 controls the opening degree of the regulating valve 60 in the cooling branch of the first battery 61 to increase, and controls 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 decreased, thereby achieving temperature equalization of the first battery 61 and the second battery 62.
  • the battery thermal management controller 72 controls the opening degree of the regulating valve 601 in the cooling branch of the second battery 62 to increase, and controls the opening degree of the regulating valve 60 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.
  • the pump 51 is primarily used to provide power
  • the media container 52 is primarily used for storing media and accepting media added to the temperature regulating system, when the media in the temperature regulating system is reduced, in the media container 52
  • the media can be replenished automatically.
  • the heater 53 can perform CAN communication with the controller to provide heating power to the temperature regulation system of the onboard battery, controlled by the controller, and the heater 53 can be disposed at any position between the medium container 52 and the first temperature sensor. That is, the heater 53 is not directly in contact with the battery, and has high safety, reliability, and practicability.
  • the medium 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.
  • the following describes how the battery temperature adjustment module 5 obtains the required power P1 and the actual power P2 of the battery, with the first battery 61 as an example.
  • the battery management controller 71 is configured to acquire the required power of the battery, where the battery management controller 71 acquires the first parameter when the battery is turned on, and generates the first required power according to the first parameter. And obtaining a second parameter of the battery during temperature adjustment, and generating a second required power according to the second parameter, and generating the required power P1 according to the first required power and the second required power.
  • 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 obtains the first between the initial temperature and the target temperature.
  • a temperature difference is generated, and the first required power is generated according to the first temperature difference and the target time.
  • the battery management controller 71 may generate the first required power by using the formula (1):
  • ⁇ T 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
  • M is the mass of the battery.
  • the second parameter is the average current I of the battery within a preset time, and the battery management controller 71 generates the second required power by the following formula (2):
  • I is the average current and R is the internal resistance of the battery.
  • the battery thermal management controller 72 generates a second temperature difference based on the inlet temperature and the outlet temperature, and generates the actual power P2 based on the second temperature difference and the flow rate.
  • the battery thermal management controller 72 may obtain the actual power by the following formula (3):
  • ⁇ T 2 is the difference between the first temperature and the second temperature
  • c is the specific heat capacity of the medium in the flow path
  • m is the mass of the medium flowing through the cross section of the flow path per unit time
  • m v* ⁇ *s
  • v is the flow velocity of the medium
  • ⁇ is the density of the medium
  • s is the cross-sectional area of the flow path.
  • the battery management controller 71 determines whether the vehicle needs to perform temperature adjustment. If it is determined that the vehicle requires temperature adjustment, for example, the temperature of the battery is too high, the temperature adjustment is sent to the vehicle air conditioner controller 73 through CAN communication. The function information, the vehicle air conditioner controller 73 turns on the temperature adjustment function and sends the heat exchange information to the battery thermal management controller 72, while the onboard controller controls the second electronic valve 43 to be turned on, and the battery thermal management controller 72 controls the pump 51 to the default speed. (such as low speed) start working.
  • the vehicle air conditioner controller 73 turns on the temperature adjustment function and sends the heat exchange information to the battery thermal management controller 72, while the onboard controller controls the second electronic valve 43 to be turned on, and the battery thermal management controller 72 controls the pump 51 to the default speed. (such as low speed) start working.
  • the battery management controller 71 acquires 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 may be preset according to actual conditions, and according to The above formula (1) calculates the first required power of the battery.
  • the battery management controller 71 also acquires the average current I of the battery for a preset time and calculates the second required power of the battery according to formula (2).
  • the battery thermal management controller 72 acquires the first temperature sensor 551 and the second temperature sensor 561 to detect the temperature information, and acquires the flow rate information detected by the flow rate sensor 571, and calculates the actual power P2 of the battery according to the above formula (3).
  • the vehicle air conditioner controller 73 controls the output power of the compressor and the opening degree of the second expansion valve 42 according to the required power P1 of the battery, the actual power P2, and optionally, the battery thermal management controller 72 adjusts the rotational speed of the pump 51. For example, if the required power P1 is greater than the actual power P2, the power of the compressor is increased and the opening degree of the second expansion valve 42 is increased according to the difference between the required power P1 and the actual power P2, and the rotation speed of the pump 51 is selectively increased. If the required power P1 is less than the actual power P2, the power of the compressor is reduced and the opening degree of the second expansion valve 42 is decreased according to the difference between the required power P1 and the actual power P2, and the pump 51 is selectively reduced. Rotating speed.
  • the required power P1 is composed of two parts.
  • the initial temperature of the battery is 45 ° C and the target temperature is 35 ° C
  • the amount of heat that needs to be dissipated when the battery is lowered from 45 ° C to 35 ° C. It is fixed and can be directly calculated by the above formula (1), that is, ⁇ T 1 *C*M/t, that is, the first required power.
  • ⁇ T 1 *C*M/t that is, the first required power.
  • there is a discharge and charging process This process generates heat. Since the discharge of the battery or the charging current changes, this part of the heat can also be directly obtained by detecting the average current I of the battery.
  • Equation (2) I 2 *R, directly calculates the heating power of the current battery, that is, the second required power.
  • the battery management controller 71 is further configured to acquire a temperature of the battery, when the temperature of the battery is greater than the 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 The temperature adjustment system enters the heating mode.
  • the first temperature threshold and the second temperature threshold may be preset according to actual conditions.
  • the first temperature threshold is generally greater than the second temperature threshold.
  • the first temperature threshold may be 40 ° C
  • the second temperature threshold may be 0 ° C.
  • the battery management controller 71 detects the temperature of the battery in real time (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, 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 the battery, control the temperature adjustment system to enter the cooling mode, and send the battery cooling function to start. The information is given to the vehicle air conditioner controller 73. The vehicle air conditioner controller 73 controls the second electronic valve 43 to be turned on after receiving the battery cooling function activation information to exchange heat between the medium and the battery to lower the temperature of the battery. As shown in FIG.
  • the flow directions of the medium in the corresponding first pipe and the second pipe in the circuit where the battery is located are: compressor 1 - condenser 2 - second electronic valve 43 - second expansion valve 42 - heat exchanger 41 - compressor 1; heat exchanger 41 - heater 53 (closed) - pump 51 - flow rate sensor 571 - first temperature sensor 551 - first battery 61 - second temperature sensor 561—The medium container 52—the heat exchanger 41, is circulated, and heat is exchanged at the heat exchanger 41 to achieve temperature reduction of the battery.
  • the battery management controller 71 controls the temperature adjustment system to enter the heating mode, and
  • the battery heating function activation information is sent to the vehicle air conditioner controller 73.
  • the vehicle air conditioner controller 73 controls the second electronic valve 43 to close after receiving the battery heating function activation information, while the battery thermal management controller 72 controls the heater 53 to be turned on to provide heating power to the temperature adjustment system.
  • the flow directions of the medium in the first battery 61 and the second battery 62 are: 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 temperature sensor 552 - second battery 62—Second temperature sensor 562—medium container 52—heat exchanger 41 is circulated to achieve temperature rise of the battery.
  • the vehicle air conditioner controller 73 acquires a power difference between the required power and the actual power when the required power is greater than the actual power, and when the temperature adjustment system is in the cooling mode, the vehicle air conditioner controller 73 increasing at least one of a power of the compressor for cooling the battery and an opening degree of the valve according to the power difference, and reducing/maintaining the power of the compressor of the battery and the opening degree of the valve when the required power is less than or equal to the actual power At least one of them.
  • the battery thermal management controller 72 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 required power is less than or equal to the actual power.
  • the battery management controller 71 acquires the required power P1 of the battery
  • the battery thermal management controller 72 acquires the actual power P2 of the battery
  • the vehicle air conditioning controller 73 according to the required power P1 and the actual power. P2 judges. If the required power P1 of the battery is greater than the actual power P2, it indicates that if the cooling of the battery cannot be completed within the target time according to the current cooling power or the medium flow rate, the vehicle air conditioning controller 73 obtains the required power P1 and the actual power P2 of the battery.
  • the vehicle air conditioner controller 73 can keep the power of the compressor 1 unchanged or appropriately reduce the power of the compressor 1, or reduce the medium flow of the battery, that is, reduce the number
  • the opening of the expansion valve 42 is to reduce the cooling power of the battery.
  • the battery management controller 71 transmits information for turning off the temperature adjustment function to the vehicle air conditioner controller 73 via CAN communication, and the vehicle air conditioner controller 73 controls the second electronic valve 43 to be closed.
  • the vehicle air conditioner controller 73 appropriately increases the power of the compressor 1 so that the battery completes the cooling as soon as possible.
  • the battery thermal management controller 72 acquires the battery P1, and the battery thermal management controller 72 acquires the actual power P2 of the battery. If the required power P1 of the battery is greater than the actual power P2, it indicates that if the temperature of the battery cannot be completed within the target time according to the current heating power or the medium flow rate, the battery thermal management controller 72 obtains the required power P1 of the battery and the actual amount.
  • the power difference between the powers P2, and the power of the heater 53 for heating the battery is increased according to the power difference, or the medium flow rate of the battery is increased, for example, the rotation speed of the pump 51 can be increased, so that the battery can be completed in the target time. Temperature adjustment.
  • the battery thermal management controller 72 may appropriately reduce the power of the heater 53, or keep the power of the heater 53 unchanged, or adjust to reduce the medium flow of the battery circuit.
  • the battery management controller 71 sends information to turn off the temperature adjustment function to the battery thermal management controller 72 through CAN communication, and the battery thermal management controller 72 controls the heating.
  • the unit 53 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 still lower than 10 ° C, the battery thermal management controller 72 appropriately increases the power of the heater 53 to complete the temperature rise as soon as possible.
  • the battery thermal management controller 72 is further configured to reduce/maintain the rotational speed of the pump when the required power is less than or equal to the actual power.
  • the battery thermal management controller 72 further uses To increase the speed of the pump.
  • the battery thermal management controller 72 controls the rotation speed of the pump 51 to decrease to save power, or keep the rotation speed of the pump 51 not maintained. change. If the required power P1 of the battery is greater than the actual power P2, the battery thermal management controller 72 is further used to control the increase of the rotational speed of the pump 51, which can increase the mass of the medium flowing through the cross-sectional area of the cooling flow path per unit time, thereby improving the actual battery life.
  • the power P2 is used to achieve temperature regulation within the target time t. And if the required power P1 of the battery is equal to the actual power P2, then the rotational speed of the control pump 51 is maintained at the current rotational speed.
  • the temperature adjustment system of the vehicle battery shown in FIG. 2 has a simpler structure, and the actual cooling/heating power of the first battery 61 and the second battery 62 can be estimated by the temperature sensor and the flow rate sensor of the respective branches.
  • the actual cooling/heating power of the first battery 61 and the second battery 62 is the sum of the two branches.
  • the battery management controller 71 detects that the temperature difference between the water outlet temperature and the water inlet temperature of the battery exceeds a set value
  • the battery internal circulation function startup information is transmitted.
  • the vehicle air conditioner controller 73 forwards the battery to the battery thermal management controller 72.
  • the battery thermal management controller 72 controls the pump to start working, and the pump starts to drive the medium in the cooling branch, and the medium reaches the battery temperature through the medium. balanced.
  • FIG. 5 is a schematic structural view of a temperature adjustment system of a vehicle battery according to a fourth embodiment of the present application.
  • 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.
  • the plurality of battery cooling branches are respectively connected to the plurality of compressors through a plurality of valves.
  • Each of the in-vehicle cooling branches includes an evaporator corresponding to the compressor and a valve connected to the evaporator.
  • each of the battery cooling branches is provided with a temperature sensor for detecting the temperature of the medium on the battery cooling branch.
  • a third temperature sensor 451 is disposed on the battery cooling branch 401
  • a third temperature sensor 452 is disposed on the battery cooling branch 402.
  • each of the battery cooling branches is provided with a flow rate sensor for detecting the flow rate of the medium on the battery cooling branch.
  • the battery cooling branch 401 is provided with a second flow rate sensor 441
  • the battery cooling branch 402 is provided with a second flow rate sensor 442.
  • the cooling branch is a first battery 61 and a second battery 62, respectively, and is connected in parallel with each other.
  • the cooling branches are respectively a cooling branch 111 and a cooling branch 112.
  • the battery cooling branches are a battery cooling branch 401 and a battery cooling branch 402, respectively.
  • the in-vehicle cooling branch is an in-vehicle cooling branch 301 and an in-vehicle cooling branch 302, respectively.
  • the compressor may be multiple and not related to each other
  • the in-vehicle cooling branch 301 may include a first electronic valve 331 and a first expansion valve 321
  • the in-vehicle cooling branch 302 may include a first electronic valve 332 and a first Expansion valve 322.
  • the battery cooling branch 401 can include a second electronic valve 431 and a second expansion valve 421
  • the battery cooling branch 402 can include a second electronic valve 432 and a second expansion valve 422.
  • the flow direction of the refrigerant in the cooling branch of the vehicle is: compressor 11 - condenser 21 - first electron Valve 331 - first expansion valve 321 - evaporator 311 - compressor 11; refrigerant flow direction of the battery cooling branch is: compressor 11 - condenser 21 - second electronic valve 431 - second expansion valve 421 - second flow rate
  • the refrigerant flow direction of the in-vehicle cooling branch 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 road 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.
  • the battery cooling function 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 in-vehicle air conditioner does not require cooling, the first electronic valve 331 and the first electronic valve 332 are closed.
  • heat exchanger 411 - heater 53 start) - pump 51 - regulating valve 60 - flow rate sensor 571 - first temperature sensor 551 - first battery 61 a second temperature sensor 561 - a medium container 52 - a 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.
  • the battery temperature adjustment module 5 may further include a controller 7, wherein the controller 7 may include a pool management controller, a battery thermal management controller 72, and a vehicle air conditioner controller 73.
  • the vehicle air conditioner controller 73 estimates the cooling power of the battery cooling path 401 through the third temperature sensor 451, the fourth temperature sensor 1A, and the second flow rate sensor 441, and passes through the third temperature sensor 452, the fourth temperature sensor 1B, and the second flow rate sensor. 442 estimates the cooling power of the battery cooling branch 402.
  • the vehicle air conditioner controller 73 can control the refrigerant flow rate of the battery cooling branch 401 through the second electronic valve 431 and the second expansion valve 421, and control the refrigerant flow rate of the battery cooling branch 402 through the second electronic valve 432 and the second expansion valve 422. Thereby, the cooling power of the battery cooling branch 1 and the battery cooling branch 2 is controlled.
  • the vehicle air conditioner controller 73 also detects the air temperature in each area of the vehicle compartment, and can adjust the power distribution of each cooling branch to the battery cooling branch according to the temperature difference of each area and the thermal management power demand of the system, thereby balancing the respective areas. air temperature.
  • both the air outlet 1 and the air outlet 2 are supplied with cooling power by the cooling branch 1, and both the air outlet 3 and the air outlet 4 are supplied with cooling power by the cooling branch 2.
  • the vehicle air conditioner controller 73 detects that the temperature in the vicinity of 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 vehicle air conditioner controller 73
  • the opening degree of the first expansion valve 321 can be controlled to increase, and the opening degree of the second expansion valve 421 is reduced, 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.
  • the vehicle air conditioner controller 73 can control the opening degree of the first expansion valve 322 to decrease, and the opening degree of the second expansion valve 422 increases, thereby causing the cooling branch in the cooling branch 112.
  • the cooling power of the path 302 is reduced, and the cooling power of the battery cooling branch 402 is increased. This allows the temperature in each area of the cabin to be balanced while meeting the cooling power requirements of the battery.
  • the battery management controller 71 detects temperature information of the power battery pack in real time.
  • the battery cooling function start information is sent to the vehicle air conditioner controller 73 through CAN communication, and when the battery temperature reaches the set value of the cooling end, the battery cooling function end information is transmitted.
  • the battery heating function activation information is sent to the vehicle air conditioner controller 73 via CAN communication, and when the battery temperature reaches the heating end setting value, the battery heating function end information is transmitted.
  • the battery management controller 71 can estimate the current battery heat generation by the current discharge/charge current of the battery, and estimate the actual cooling/heating efficiency of the system by the difference between the average temperature of the current two batteries and the battery target temperature value, and send The required battery heating/cooling power information is supplied to the vehicle air conditioner controller 73.
  • the battery management controller 71 detects 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 flow rate information of the second flow rate sensor 441 and the second flow rate sensor 442 in real time. Thereby, the cooling power of the battery cooling branch 401 and the battery cooling branch 402 is estimated.
  • the cooling power distribution of the redistribution of the in-vehicle cooling branch and the battery cooling branch can be achieved 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 vehicle air conditioner When adjusting the cooling power allocated by the cooling branch 111 and the cooling branch 112 to the battery cooling branch, the vehicle air conditioner first adjusts the opening degree of the expansion valve, and after the adjustment is completed, the vehicle air conditioning controller 73 estimates the cooling of each battery cooling branch. Power, determine whether it has been adjusted in place, if the battery cooling branch power has not reached the target value, continue to adjust the opening of the expansion valve.
  • the battery thermal management controller 72 detects the water inlet temperature of the first battery 61 through the first temperature sensor 551, detects the water outlet temperature of the first battery 61 through the second temperature sensor 561, calculates the temperature difference between the inlet and outlet, and passes the first flow rate sensor 571.
  • the flow rate of the medium in the cooling branch of the first battery 61 can be measured, and the current actual cooling/heating power of the cooling branch of the first battery is estimated by the above three parameters.
  • the battery thermal management controller 72 detects the water inlet temperature of the second battery 62 through the second temperature sensor 552, detects the water outlet temperature of the second battery 62 through the second temperature sensor 562, calculates the temperature difference between the inlet and outlet, and passes the first flow rate sensor 572.
  • the flow rate of the medium in the cooling branch of the second battery 62 can be measured, and the current actual cooling/heating power of the cooling branch of the second battery 62 is estimated by the above three parameters.
  • the battery thermal management controller 72 can control the opening degrees of the regulating valve 60 and the regulating valve 601 to control the two cooling branches of the first battery 61 and the second battery 62 according to the battery temperature conditions of the first battery 61 and the second battery 62.
  • the medium flow is distributed so as to control the battery temperature equalization of the first battery 61 and the second battery 62.
  • the opening degree of the regulating valve 60 can be increased to reduce the opening degree of the regulating valve 601 when the first battery 61 and the second battery
  • the opening degrees of the regulating valve 60 and the regulating valve 601 can be controlled to maintain the temperature balance of the two batteries.
  • the temperature regulation system of the vehicle battery of the embodiment of the present application can simultaneously provide the cooling power for the battery vehicle, and the cooling power of the system is provided by the vehicle air conditioner, and the cooling capacity is shared with the interior refrigeration system, which is beneficial to reducing the volume of the battery thermal management system.
  • the distribution of cooling capacity is more flexible, which can meet the cooling power requirement of the cabin and meet the cooling requirements of the power battery.
  • the battery thermal management function is centrally controlled by the battery thermal management controller 72.
  • the battery thermal management controller 72 determines the heating or cooling power required by the system through the water temperature, the flow rate, the power battery parameters, and the vehicle air conditioning operating conditions, and controls the air conditioning refrigerant flow rate.
  • the distribution, control system and the air conditioning of the vehicle air conditioner are reasonably distributed so that both the interior cooling and the battery cooling are required.
  • FIG. 7 is a schematic structural diagram of a temperature adjustment system of a vehicle battery according to a fifth embodiment of the present application.
  • 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.
  • each of the cooling branches may include a compressor and a condenser, and the plurality of cooling branches are connected to the battery cooling branch 4.
  • a 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).
  • the two compressors are in a parallel relationship, and the refrigerant circulation circuit of the compressor 11 is: a compressor 11 - a condenser 21 - a second electronic valve 43 - a second expansion valve 42 - a heat exchanger 41 - a compressor 11.
  • the refrigerant circulation circuit of the compressor 12 is: a compressor 12 - a condenser 22 - a second electronic valve 43 - a second expansion valve 42 - a heat exchanger 41 - a compressor 12.
  • the plurality of compressors 1 may share one condenser 2.
  • the refrigerant flow direction of the compressor 11 is: a compressor 11 - a condenser 2 - a second electronic valve 43 - a second expansion valve 42 - a heat exchanger 41 - a compressor 11.
  • the refrigerant circulation circuit of the compressor 12 is: a compressor 12 - a condenser 2 - a second electronic valve 43 - a second expansion valve 42 - a heat exchanger 41 - a compressor 12.
  • the temperature regulation system of the vehicle battery may further include: a plurality of in-vehicle cooling branches.
  • the first in-vehicle cooling branch is: compressor 11 - condenser 21 - first electronic valve 331 - first expansion valve 321 - evaporator 311 - compressor 11;
  • first battery cooling branch is: compressor 11 - Condenser 21 - Second electronic valve 43 - Second expansion valve 42 - Heat exchanger 41 - Compressor 11.
  • the second in-vehicle cooling branch is: compressor 12 - condenser 22 - first electronic valve 332 - first expansion valve 322 -
  • the evaporator 312 is the compressor 12
  • the second battery cooling branch is: the compressor 12 - the condenser 22 - the second electronic valve 43 - the second expansion valve 42 - the heat exchanger 41 - the compressor 12.
  • a plurality of evaporators may also be connected to a plurality of compressors by sharing one electronic valve and an expansion valve, and the flow direction of the refrigerant will not be described in detail herein.
  • a plurality of compressors 1 are respectively connected to the battery cooling branch 4 through a plurality of electronic valves.
  • the refrigerant circulation circuit of the compressor 11 is: a compressor 11 - a condenser 21 - a second electronic valve 431 - a second expansion valve 421 - a heat exchanger 41 - a compressor 11.
  • the refrigerant circulation circuit of the compressor 12 is: a compressor 12 - a condenser 22 - a second electronic valve 432 - a second expansion valve 422 - a heat exchanger 41 - a compressor 12.
  • the temperature regulation system of the vehicle battery may further include: a plurality of in-vehicle cooling branches.
  • the temperature adjustment 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 the first three-way valve 47, and a plurality of compressors are connected to the in-vehicle cooling branch through the second three-way valve 48.
  • a plurality of cooling branches are connected to one in-vehicle cooling branch, and a three-way valve is used instead of the electronic valve.
  • the working principle is the same as that in the above embodiment, and details are not described herein again.
  • 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 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.
  • 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.
  • features defining “first” and “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
  • 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 otherwise explicitly stated and defined. , 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.
  • the specific meanings of the above terms in the present application can be understood on a case-by-case basis.
  • the first feature "on” or “below” the second feature may be the direct contact of the first and second features, or the first and second features are indirectly through the intermediate medium, unless otherwise explicitly stated and defined. contact.
  • 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.

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Abstract

L'invention concerne un système de régulation de température pour une batterie embarquée, le système comprenant : un module de climatisation embarqué (100) comprenant une branche de réfrigération (10) et une branche de refroidissement de batterie (4) connectée en série à la branche de réfrigération (10), la branche de réfrigération (10) comprenant un compresseur (1) et un condenseur (2), et la branche de refroidissement de batterie (4) comprenant un échangeur de chaleur (41) et des vannes (42, 43) connectées à l'échangeur de chaleur (41) ; un module de régulation de température de batterie (5) connecté à la branche de refroidissement de batterie (4) pour former un passage d'échange de chaleur, le module de régulation de température de batterie (5) comprenant un récipient de milieu (52), une pompe (51), et une pluralité de branches de régulation de température, mutuellement connectées en parallèle, qui sont connectées au récipient de milieu (52) et à la pompe (51), la pluralité de branches de régulation de température mutuellement connectées en parallèle étant respectivement connectées à une pluralité de batteries (61, 62) connectées en parallèle ; et un dispositif de commande (7), connecté au module de climatisation embarqué (100) et au module de régulation de température de batterie (5), et utilisé pour réguler la température des batteries (61, 62). Le système de régulation de température peut réguler la température lorsque la température d'une batterie embarquée est excessivement élevée ou excessivement faible, de sorte que la température de la batterie embarquée soit maintenue à l'intérieur d'une plage prédéfinie, empêchant ainsi que la performance de la batterie embarquée ne soit affectée par la température.
PCT/CN2018/108735 2017-09-30 2018-09-29 Système de régulation de température pour batterie embarquée WO2019062937A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710938268.3A CN109599623B (zh) 2017-09-30 2017-09-30 车载电池的温度调节系统
CN201710938268.3 2017-09-30

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WO2019062937A1 true WO2019062937A1 (fr) 2019-04-04

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CN110048189B (zh) * 2019-04-24 2020-07-17 中通客车控股股份有限公司 一种液冷电池热管理系统及其控制方法
CN111509333A (zh) * 2020-03-23 2020-08-07 江铃汽车股份有限公司 一种电池包的分区热管理控制方法
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