CN119099280B - Dual-temperature zone liquid cooling type thermal management system, operation method of thermal management system and vehicle - Google Patents
Dual-temperature zone liquid cooling type thermal management system, operation method of thermal management system and vehicle Download PDFInfo
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- CN119099280B CN119099280B CN202411236866.2A CN202411236866A CN119099280B CN 119099280 B CN119099280 B CN 119099280B CN 202411236866 A CN202411236866 A CN 202411236866A CN 119099280 B CN119099280 B CN 119099280B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
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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
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/65—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
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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
- H01M10/65—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
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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
- H01M10/65—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
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a double-temperature-zone liquid cooling type heat management system, an operation method of the heat management system and a vehicle, which comprise a refrigeration module, a main heat management flow channel and a battery pack heat management flow channel; the main heat management flow channel and the battery pack heat management flow channel can selectively form independent liquid cooling medium circulation, and the main heat management flow channel and the battery pack heat management flow channel can also selectively form liquid cooling medium circulation in a serial connection mode; the main heat management runner can cut in or cut out the liquid cooling medium circulation by a bypass mode; the invention can provide a plurality of operation modes, can meet the thermal management requirements of vehicles under various working conditions while taking energy conservation into consideration, and has the characteristics of excellent thermal management performance, rich and easily controlled functional modes, high integration level and low energy consumption.
Description
Technical Field
The invention relates to the technical field of automobile thermal management systems, in particular to a double-temperature-zone liquid cooling type thermal management system, an operation method of the thermal management system and a vehicle.
Background
The battery pack, the motor and the controller of the new energy automobile taking the motor as one of driving force can generate a large amount of heat, and heat dissipation is required in a high-temperature environment, otherwise, the performance, the safety and the service life of the new energy automobile are influenced, the low-temperature environment is very easy to influence the endurance of the battery pack, and therefore, the battery pack of the new energy automobile is required to be subjected to heat preservation/heating treatment in the low-temperature environment.
Based on the above considerations, a new energy automobile is generally configured with a thermal management system to realize the temperature control of each part, where the liquid cooling type thermal management system is a thermal management system scheme widely used in the new energy automobile field.
In the prior art, a part of the new energy automobile is provided with independent heat management systems (at least comprising a plurality of refrigerating devices and a plurality of liquid cooling waterways) for the battery pack, the motor and the controller respectively, so that the problems of overlarge energy consumption, high system complexity and overlarge weight of the whole automobile are obviously caused, and the new energy automobile also comprises a part of the new energy automobile, wherein a set of refrigerating devices are used as cores of the heat management systems, and the independent liquid cooling waterways are respectively provided for the battery pack, the motor, the controller and other parts, so that the energy consumption and the weight of the whole automobile can be reduced to a certain extent, but the system complexity is not effectively reduced, and the new energy automobile still has higher energy consumption and the weight of the whole automobile.
In summary, how to provide a thermal management system with excellent thermal management performance, rich and controllable functional modes, high integration level and low energy consumption for a new energy automobile is a problem to be solved.
Disclosure of Invention
The invention aims to provide a double-temperature-zone liquid cooling type heat management system, an operation method of the heat management system and a vehicle, which have the characteristics of excellent heat management performance, rich and controllable functional modes, high integration level and low energy consumption.
The invention provides a double-temperature-zone liquid cooling type heat management system which is applied to a vehicle, wherein the vehicle comprises a battery pack and at least one electric energy conversion component, the vehicle comprises a refrigeration module, a main heat management flow channel and a battery pack heat management flow channel, the refrigeration module comprises a compressor, a condenser, a throttling device and an evaporation heat exchanger, refrigerant channels of the compressor, the condenser, the throttling device and the evaporation heat exchanger are sequentially communicated in a circulating mode, so that the refrigerant can circulate in refrigerant channels of the compressor, the condenser, the throttling device and the evaporation heat exchanger, the main heat management flow channel comprises a first circulating pump, a main flow channel heat exchanger, a radiating water tank with a fan and a branch switching valve, the main flow channel heat exchanger can exchange heat with the electric energy conversion component of the vehicle, the first circulating pump, the main flow channel heat exchanger, the water tank and the branch switching valve are sequentially communicated in a circulating mode, the battery pack heat management flow channel comprises a second circulating pump and a second circulating heat exchanger, the heat management valve of the battery pack heat exchanger, the main heat management heat exchanger and the heat management valve of the main heat management flow channel of the vehicle can be communicated with the main heat management flow channel of the vehicle, the main heat management flow channel of the battery pack heat exchanger can be mutually communicated with the main heat management flow channel of the battery pack heat exchanger, the main heat exchanger heat exchange medium can be mutually connected with the main heat management flow channels of the heat exchanger, the main heat exchanger heat exchange channels of the main heat exchange channels of the vehicle, the heat exchange channels of the heat exchange fluid can be respectively, the main heat management flow channel and the battery pack heat management flow channel can also selectively form liquid cooling medium circulation in a serial connection mode, the main heat management flow channel can cut in or cut out the cooling water tank to circulate the liquid cooling medium in a bypass mode, and the main heat management flow channel can cut in or cut out the liquid cooling medium channel of the condenser of the refrigeration module to circulate the liquid cooling medium in a bypass mode.
According to the technical scheme, the branch switching valve of the main thermal management flow channel is a four-way valve and comprises an a port, a b port, a c port and a d port which are controlled by an upper computer to be opened/closed, wherein the a port of the branch switching valve is communicated with a battery pack heat exchanger of the battery pack thermal management flow channel, the d port of the branch switching valve is communicated with a liquid cooling medium channel of an evaporation heat exchanger of the refrigeration module, the b port of the branch switching valve is communicated with a first circulating pump of the main thermal management flow channel, and the c port of the branch switching valve is communicated with a radiating water tank of the main thermal management flow channel.
According to the technical scheme, the main heat management flow channel further comprises a first bypass switching valve, and the first bypass switching valve can cut in or cut out the liquid cooling medium circulation through the heat dissipating water tank in a bypass mode.
In the above technical scheme, the first bypass switching valve of the main thermal management flow channel is a three-way valve, which comprises an a port, a b port and a c port which are controlled by an upper computer to be opened/closed, wherein the a port of the first bypass switching valve is communicated with the radiating water tank, the c port of the first bypass switching valve is communicated with the main flow channel heat exchanger, and the b port of the first bypass switching valve is communicated with the branch switching valve.
According to the technical scheme, the main heat management flow channel further comprises a second bypass switching valve and a one-way valve, the second bypass switching valve comprises two ports which are controlled by an upper computer to be opened/closed, the two ports of the second bypass switching valve are respectively communicated with the outlet end of the radiating water tank and the inlet end of a liquid cooling medium channel of a condenser of the refrigerating module, and the two ports of the one-way valve are respectively communicated with the outlet end of the liquid cooling medium channel of the condenser of the refrigerating module and the inlet end of the radiating water tank.
In the above technical scheme, the battery pack thermal management flow channel further comprises a heater for heating the liquid cooling medium.
In the above technical solution, the dual-temperature-zone liquid-cooled thermal management system of the present invention further includes a first temperature sensor connected to an inlet end of the heat dissipating water tank of the main thermal management flow channel, a second temperature sensor connected to an inlet end of the battery heat exchanger of the battery thermal management flow channel, a third temperature sensor connected to an outlet end of the battery heat exchanger of the battery thermal management flow channel, and a fourth temperature sensor connected to an inlet end of the main flow channel heat exchanger of the main thermal management flow channel.
The operation method of the thermal management system is applied to the double-temperature-zone liquid cooling type thermal management system, and comprises the following steps:
According to at least one working condition signal of the vehicle and/or the double-temperature-zone liquid cooling type heat management system, selectively entering one of the following operation modes:
The compressor refrigeration mode comprises the steps of starting a compressor and a throttling device of a refrigeration module, starting a fan of a heat radiation water tank, enabling a main heat management flow channel and a battery pack heat management flow channel to form mutually independent liquid cooling medium circulation, enabling the liquid cooling medium of the main heat management flow channel to absorb heat of an electric energy conversion part through a main flow channel heat exchanger and radiate heat at the heat radiation water tank, enabling the liquid cooling medium of the battery pack heat management flow channel to absorb heat of a battery pack through a battery pack heat exchanger and radiate heat at an evaporation heat exchanger of the refrigeration module, and enabling the liquid cooling medium channel of a condenser of the refrigeration module to be connected into the liquid cooling medium circulation in a branch way;
The heat dissipation mode of the water tank comprises the steps of stopping the compressor and the throttling device of the refrigeration module, starting the fan of the heat dissipation water tank, enabling the main heat management flow channel and the battery pack heat management flow channel to form liquid cooling medium circulation in a serial mode, enabling the liquid cooling medium of the main heat management flow channel to absorb heat of the electric energy conversion component through the main flow channel heat exchanger and dissipate heat at the heat dissipation water tank, enabling the liquid cooling medium of the battery pack heat management flow channel to absorb heat of the battery pack through the battery pack heat exchanger and dissipate heat at the heat dissipation water tank of the main heat management flow channel, and enabling the liquid cooling medium channel of the condenser of the refrigeration module to be cut out of liquid cooling medium circulation;
The waste heat utilization mode comprises the steps of stopping a compressor and a throttling device of the refrigeration module, stopping a fan of the heat radiating water tank, enabling the main heat management flow channel and the battery pack heat management flow channel to form liquid cooling medium circulation in a serial mode, enabling the liquid cooling medium of the main heat management flow channel to absorb heat of the electric energy conversion component through the main flow channel heat exchanger, enabling the heat to be transferred to the battery pack through the battery pack heat exchanger of the battery pack heat management flow channel, enabling the heat radiating water tank to cut out liquid cooling medium circulation in a bypass mode, and enabling the liquid cooling medium channel of the condenser of the refrigeration module to be cut out of liquid cooling medium circulation;
A battery self-circulation mode/a battery heat preservation mode, wherein a compressor and a throttling device of the refrigeration module are stopped, a fan of the radiating water tank is stopped, and the liquid cooling medium circulation of the main heat management flow channel is stopped;
And in a standby mode, stopping the compressor and the throttling device of the refrigeration module, stopping the fan of the radiating water tank, and stopping the liquid cooling medium circulation of the main heat management flow channel and the liquid cooling medium circulation of the battery pack heat management flow channel.
In the technical scheme, when the compressor enters a refrigeration mode, an a port and a d port of a branch switching valve of a main heat management flow channel are communicated, a b port and a c port of the branch switching valve of the main heat management flow channel are communicated, and an a port and a c port of a first bypass switching valve are communicated, so that the main heat management flow channel and a battery pack heat management flow channel form mutually independent liquid cooling medium circulation;
When the water tank heat dissipation mode is entered, a port c and a port d of a branch switching valve of the main heat management flow channel are communicated, a port a and a port b of the branch switching valve of the main heat management flow channel are communicated, and the port a and the port c of the first bypass switching valve are communicated, so that the main heat management flow channel and the battery pack heat management flow channel form liquid cooling medium circulation in a serial connection mode;
when the waste heat utilization mode is entered, a port c and a port d of a branch switching valve of the main heat management flow channel are communicated, a port a and a port b of the branch switching valve of the main heat management flow channel are communicated, and a port b and a port c of the first bypass switching valve are communicated, so that the main heat management flow channel and the battery pack heat management flow channel form liquid cooling medium circulation in a serial connection mode, and the heat dissipating water tank cuts out liquid cooling medium circulation;
When the battery self-circulation mode/the battery heat preservation mode is entered, an a port and a d port of a branch switching valve of the main heat management flow channel are communicated, a b port and a c port of the branch switching valve of the main heat management flow channel are closed, so that the liquid cooling medium circulation of the main heat management flow channel is stopped, and the battery pack heat management flow channel forms independent liquid cooling medium circulation.
A vehicle comprises the double-temperature-zone liquid cooling type heat management system.
Compared with the prior art, the dual-temperature-area liquid cooling type heat management system, the operation method of the heat management system and the vehicle have the advantages that under the control of the branch switching valve of the main heat management flow channel, the main heat management flow channel and the battery pack heat management flow channel can selectively form independent liquid cooling medium circulation, the main heat management flow channel and the battery pack heat management flow channel can selectively form liquid cooling medium circulation in a serial mode, the main heat management flow channel can cut in or cut out a heat radiating water tank to circulate liquid cooling medium in a bypass mode, the main heat management flow channel can cut in or cut out a liquid cooling medium channel of a condenser of a refrigeration module to circulate liquid cooling medium in a branch mode, and at least multiple operation modes such as a compressor refrigeration mode, a water tank heat radiating mode, a waste heat utilization mode, a battery self-circulation mode, a battery heat preservation mode and a standby mode can be provided, the heat management requirements of the vehicle under various excellent working conditions are met while energy conservation is achieved, and the dual-temperature-area liquid cooling type heat management system has the characteristics of being rich in heat management capability, easy to control, high in integration degree and low in energy consumption.
Drawings
Fig. 1 is a system configuration view of the present invention.
Fig. 2 is a schematic diagram of refrigerant circulation and liquid cooling medium circulation in the compressor refrigeration mode according to the present invention.
Fig. 3 is a schematic diagram of the liquid cooling medium circulation in the radiator cooling mode according to the present invention.
Fig. 4 is a schematic diagram of the liquid cooling medium circulation in the waste heat utilization mode according to the present invention.
Fig. 5 is a schematic diagram of the liquid cooling medium circulation in the battery self-circulation mode/battery thermal insulation mode according to the present invention.
The device comprises 100 parts of a battery pack, 200 parts of an electric energy conversion component, 11 parts of a compressor, 12 parts of a condenser, 13 parts of a throttling device, 14 parts of an evaporation heat exchanger, 21 parts of a first circulating pump, 22 parts of a main channel heat exchanger, 23 parts of a radiating water tank, 231 parts of a fan, 24 parts of a branch switching valve, 25 parts of a first bypass switching valve, 26 parts of a second bypass switching valve, 27 parts of a one-way valve, 31 parts of a second circulating pump, 32 parts of a battery pack heat exchanger, 33 parts of a heater, TT1 parts of a first temperature sensor, TT2 parts of a second temperature sensor, TT3 parts of a third temperature sensor, TT4 parts of a fourth temperature sensor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment provides a double-temperature-zone liquid cooling type heat management system which is applied to a vehicle (particularly a new energy automobile which stores energy by a battery pack and takes a motor as (one of) driving force).
The vehicle includes a battery pack 100 and at least one electric energy conversion component 200, where the battery pack 100 is typically a lithium ion battery pack 100, and the electric energy conversion component 200 may be a motor or a controller (i.e. a motor driver), and in this embodiment, the electric energy conversion component 200 is a motor, an automobile controller (MCU), and an all-in-one controller integrated in the same module.
Referring to fig. 1, the dual-temperature-zone liquid-cooled thermal management system of the present embodiment includes a refrigeration module, a main thermal management flow channel 2, and a battery thermal management flow channel 3.
The refrigeration module comprises a compressor 11, a condenser 12, a throttling device 13 and an evaporation heat exchanger 14, wherein the compressor 11 is a compressor for compressing a refrigerant in the refrigeration system, preferably a variable frequency compressor, the condenser 12 is a condenser in the refrigeration system, particularly a water condenser, namely the condenser 12 is provided with a liquid cooling medium channel, the air convection devices such as a fan and the like can dissipate heat through the liquid cooling medium, the selectable configuration of the condenser 12 is provided, the throttling device 13 is a throttling device in the refrigeration system, preferably an electronic expansion valve, the evaporation heat exchanger 14 is a metal heat exchanger and is provided with a refrigerant evaporation structure for being used as an evaporator in the refrigeration system, the evaporation heat exchanger 14 is provided with a liquid cooling medium channel, and the liquid cooling medium flowing through the liquid cooling medium channel can be cooled to a low temperature, and the refrigerant channels of the compressor 11, the condenser 12, the throttling device 13 and the evaporation heat exchanger 14 are sequentially and circularly communicated, so that the refrigerant can circulate in the refrigerant channels of the compressor 11, the condenser 12, the throttling device 13 and the evaporation heat exchanger 14, and the refrigeration medium channel can realize the function of the refrigeration module.
The main thermal management flow channel 2 comprises a first circulation pump 21, a main flow channel heat exchanger 22, a heat dissipating water tank 23 with a fan 231 and a branch switching valve 24, wherein the first circulation pump 21 is a liquid cooling medium dedicated circulation pump, such as an electronic water pump, the main flow channel heat exchanger 22 can exchange heat with the electric energy conversion component 200 of the vehicle, in some possible embodiments, the main flow channel heat exchanger 22 is a liquid cooling medium heat exchanger built in the electric energy conversion component 200, in other possible embodiments, the main flow channel heat exchanger 22 is a liquid cooling medium heat exchanging plate attached to the surface of the electric energy conversion component 200, the heat dissipating water tank 23 is a metal cooler with a plurality of liquid flow channels, heat dissipating fins are arranged between the liquid flow channels, and the metal cooler can dissipate heat for the liquid cooling medium flowing through the metal cooler by forced convection or natural convection, and the first circulation pump 21, the main flow channel heat exchanger 22, the water tank 23 and the liquid cooling medium channels of the branch switching valve 24 are sequentially and circularly communicated.
The battery pack heat management flow channel 3 comprises a second circulation pump 31 and a battery pack heat exchanger 32, wherein the second circulation pump 31 is a liquid cooling medium special circulation pump, such as an electronic water pump, the battery pack heat exchanger 32 can exchange heat with the battery pack 100 of the vehicle, in some possible embodiments, the battery pack heat exchanger 32 is a liquid cooling medium heat exchanger built in the battery pack 100, in other possible embodiments, the battery pack heat exchanger 32 is a liquid cooling medium heat exchange plate attached to the surface of the battery pack 100, and the second circulation pump 31, the battery pack heat exchanger 32, the branch switching valve 24 of the main heat management flow channel 2 and the liquid cooling medium channel of the evaporation heat exchanger 14 of the refrigeration module are sequentially and circularly communicated.
The main thermal management flow channel 2 and the battery thermal management flow channel 3 can selectively form a liquid cooling medium circulation independently of each other under the control of the bypass switching valve 24 of the main thermal management flow channel 2, and the main thermal management flow channel 2 and the battery thermal management flow channel 3 can also selectively form a liquid cooling medium circulation in a serial manner, the main thermal management flow channel 2 can cut in or cut out the heat dissipating water tank 23 to circulate the liquid cooling medium in a bypass manner, and the main thermal management flow channel 2 can cut in or cut out the liquid cooling medium passage of the condenser 12 of the refrigeration module to circulate the liquid cooling medium in a bypass manner.
Specifically, the bypass switching valve 24 of the main thermal management flow channel 2 is a four-way valve, specifically an electric control four-way valve, such as an electric four-way valve or a magnetic control four-way valve, and includes an a port, a b port, a c port and a d port which are controlled to be opened/closed by an upper computer (such as a vehicle controller, a programmable controller and an embedded system), wherein the a port of the bypass switching valve 24 is communicated with the battery heat exchanger 32 of the battery thermal management flow channel 3, the d port of the bypass switching valve 24 is communicated with a liquid cooling medium channel of the evaporation heat exchanger 14 of the refrigeration module, the b port of the bypass switching valve 24 is communicated with the first circulation pump 21 of the main thermal management flow channel 2, and the c port of the bypass switching valve 24 is communicated with the heat dissipating water tank 23 of the main thermal management flow channel 2.
Specifically, the main thermal management flow channel 2 further includes a first bypass switching valve 25, and the first bypass switching valve 25 can bypass the radiator tank 23 into or out of the liquid cooling medium circulation.
Further specifically, the first bypass switching valve 25 of the main thermal management flow channel 2 is a three-way valve, specifically an electric control three-way valve, such as an electric three-way valve or a magnetic control three-way valve, which includes an a port, a b port and a c port that are controlled to be opened/closed by an upper computer (such as a vehicle controller, a programmable controller and an embedded system), wherein the a port of the first bypass switching valve 25 is communicated with the heat dissipating water tank 23, the c port of the first bypass switching valve 25 is communicated with the main flow channel heat exchanger 22, and the b port of the first bypass switching valve 25 is communicated with the branch switching valve 24.
Specifically, the main thermal management flow channel 2 further includes a second bypass switching valve 26 and a check valve 27, where the second bypass switching valve 26 is specifically an electric control valve, for example, an electric valve or a magnetic control valve, and includes two ports that are controlled to be opened/closed by an upper computer (for example, a vehicle controller, a programmable controller, and an embedded system), the check valve 27 is a mechanical check valve or an electric control check valve for preventing liquid from flowing back, the two ports of the second bypass switching valve 26 are respectively connected to an outlet end of the radiator tank 23 and an inlet end of a liquid cooling medium channel of the condenser 12 of the refrigeration module, and the two ports of the check valve 27 are respectively connected to an outlet end of a liquid cooling medium channel of the condenser 12 of the refrigeration module and an inlet end of the radiator tank 23.
Further, the battery pack thermal management flow passage 3 further includes a heater 33 for heating the liquid-cooled medium, and the heater 33 is a water heater for vehicle (WPTC) connected between the second circulation pump 31 of the battery pack thermal management flow passage 3 and the battery pack heat exchanger 32.
Further, the dual-temperature-zone liquid-cooled heat management system of the present embodiment further includes a first temperature sensor TT1 (for detecting the outlet temperature of the main flow path heat exchanger 22) connected to the inlet end of the heat dissipating water tank 23 of the main heat management flow path 2, a second temperature sensor TT2 (for detecting the inlet temperature of the battery heat exchanger 32) connected to the inlet end of the battery heat exchanger 32 of the battery heat management flow path 3, a third temperature sensor TT3 (for detecting the outlet temperature of the battery heat exchanger 32) connected to the outlet end of the battery heat exchanger 32 of the battery heat management flow path 3, and a fourth temperature sensor TT4 (for detecting the inlet temperature of the main flow path heat exchanger 22) connected to the inlet end of the main flow path heat exchanger 22 of the main heat management flow path 2, and it is understood that the first temperature sensor TT1, the second temperature sensor TT2, the third temperature sensor TT3, and the fourth temperature sensor TT4 are all temperature sensors.
It CAN be understood that the dual-temperature-zone liquid-cooled thermal management system of the present embodiment is configured with an upper computer (the whole Vehicle Controller (VCU)) and the throttle device 13 of the refrigeration module, the bypass switching valve 24, the first bypass switching valve 25 and the actuator of the second bypass switching valve 26 of the main thermal management flow channel 2 are all connected with signals of the upper computer through LIN buses, the compressor 11 of the refrigeration module and the heater 33 of the battery thermal management flow channel 3 are all connected with signals of the upper computer through CAN buses, and the first circulation pump 21 and the fan 231 of the main thermal management flow channel 2, the second circulation pump 31 of the battery thermal management flow channel 3, the first temperature sensor TT1, the second temperature sensor TT2, the third temperature sensor TT3 and the fourth temperature sensor TT4 are all connected with signals of the upper computer through special signal lines.
It CAN be appreciated that the upper computer may also be in signal connection with a Battery Management System (BMS) of the battery pack 100, for example, implemented through a CAN bus, to obtain information such as a battery cell temperature, a remaining power, and a charge/discharge mode of the battery pack 100.
The embodiment also provides an operation method of the thermal management system, and the method comprises the following steps of:
According to at least one working condition signal of the vehicle and/or the double-temperature-zone liquid cooling type heat management system, selectively entering one of the following operation modes:
The compressor 11 is in a refrigerating mode (shown in fig. 2), namely, the compressor 11 and the throttling device 13 of the refrigerating module are started, the fan 231 of the radiating water tank 23 is started, the main heat management flow channel 2 and the battery pack heat management flow channel 3 form mutually independent liquid cooling medium circulation, the liquid cooling medium of the main heat management flow channel 2 absorbs heat of the electric energy conversion component 200 through the main flow channel heat exchanger 22 and radiates heat at the radiating water tank 23, the liquid cooling medium of the battery pack heat management flow channel 3 absorbs heat of the battery pack 100 through the battery pack heat exchanger 32 and radiates heat at the evaporating heat exchanger 14 of the refrigerating module, and the liquid cooling medium channel of the condenser 12 of the refrigerating module is connected into the liquid cooling medium circulation through the main heat management flow channel 2 in a branch way.
In this embodiment, the compressor 11 cooling mode is suitable for use when the temperature of the battery pack 100 is high (for example, when the battery pack 100 is charged by a fast charging technique, when the battery cell temperature of the battery pack 100 exceeds an alarm temperature, or when the battery pack is in extremely high temperature weather), and at this time, the first circulation pump 21 of the main thermal management flow channel 2 and the second circulation pump 31 of the battery pack thermal management flow channel 3 are both started, the refrigerant circulation is driven by the compressor 11 of the refrigeration module, the liquid cooling medium in the battery pack thermal management flow channel 3 can be rapidly cooled by the evaporation heat exchanger 14, the battery pack 100 can be rapidly cooled by the battery pack heat exchanger 32, the thermal management of the battery pack 100 can be completed at the fastest rate, the frequency of the compressor 11 and the opening of the throttling device 13 of the refrigeration module are controlled according to the battery cell of the battery pack 100, and at the same time, the heat dissipation can be independently performed by the heat dissipation water tank 23 (forced by the fan 231).
The water tank heat dissipation mode (shown in fig. 3) is that the compressor 11 and the throttling device 13 of the refrigeration module are stopped, the fan 231 of the heat dissipation water tank 23 is started, the main heat management flow channel 2 and the battery pack heat management flow channel 3 form liquid cooling medium circulation in a serial mode, the liquid cooling medium of the main heat management flow channel 2 absorbs heat of the electric energy conversion component 200 through the main flow channel heat exchanger 22 and dissipates heat at the heat dissipation water tank 23, the liquid cooling medium of the battery pack heat management flow channel 3 absorbs heat of the battery pack 100 through the battery pack heat exchanger 32 and dissipates heat at the heat dissipation water tank 23 of the main heat management flow channel 2, and the liquid cooling medium channel of the condenser 12 of the refrigeration module is cut out to be circulated with the liquid cooling medium.
In this embodiment, the water tank heat dissipation mode is suitable for when the temperature of the battery pack 100 is higher (for example, when the battery pack 100 is charged by a slow charging technique, when the battery pack is in a higher temperature weather, or when the vehicle is running at a moderate temperature), and at this time, the first circulation pump 21 of the main thermal management flow channel 2 and the second circulation pump 31 of the battery pack thermal management flow channel 3 are both started, or alternatively started, and the heat dissipation of the battery pack 100 and the electric energy conversion component 200 can be simultaneously achieved through the heat dissipation water tank 23 (using the fan 231 as forced convection heat dissipation), so that the thermal management of the battery pack 100 and the electric energy conversion component 200 is also achieved.
The waste heat utilization mode (shown in fig. 4) is to stop the compressor 11 and the throttle device 13 of the refrigeration module and stop the fan 231 of the heat dissipating water tank 23, the main heat management flow channel 2 and the battery pack heat management flow channel 3 form a liquid cooling medium circulation in series, the liquid cooling medium of the main heat management flow channel 2 absorbs heat of the electric energy conversion part 200 through the main flow channel heat exchanger 22 and transfers the heat to the battery pack 100 through the battery pack heat exchanger 32 of the battery pack heat management flow channel 3, the main heat management flow channel 2 bypasses the heat dissipating water tank 23 to cut out the liquid cooling medium circulation, and the liquid cooling medium channel of the condenser 12 of the refrigeration module is cut out of the liquid cooling medium circulation.
In this embodiment, the residual heat utilization mode is suitable for the situation that the temperature of the battery pack 100 is low (for example, in low-temperature weather or when driving in low-temperature weather), at this time, the first circulation pump 21 of the main thermal management flow channel 2 and the second circulation pump 31 of the battery pack thermal management flow channel 3 are both started or alternatively started, the residual heat generated by the electric energy conversion component 200 heats/keeps warm the battery pack 100, so as to ensure the normal operation of the battery pack 100, improve the endurance of the battery pack 100 in the low-temperature environment, and effectively utilize the residual heat generated by the electric energy conversion component 200, the main thermal management flow channel 2 bypasses the cooling water tank 23 to circulate the liquid cooling medium, so that the heat loss of the liquid cooling medium at the cooling water tank 23 can be avoided, and the heater 33 of the battery pack thermal management flow channel 3 can be selectively started to heat the liquid cooling medium, thereby further heating/keeping warm the battery pack 100.
The battery self-circulation mode/battery heat preservation mode (shown in figure 5) is that the compressor 11 and the throttling device 13 of the refrigeration module are stopped, the fan 231 of the heat radiation water tank 23 is stopped, the liquid cooling medium circulation of the main heat management flow channel 2 is stopped, and the battery pack heat management flow channel 3 forms independent liquid cooling medium circulation.
In this embodiment, the waste heat utilization mode is suitable for when the temperature of the battery pack 100 is low (for example, in low temperature weather, or when the automobile is idling and stopped in low temperature weather), or when the temperature difference between different battery cells of the battery pack 100 needs to be leveled, at this time, only the second circulation pump 31 of the thermal management flow channel is started, the energy consumption is low, and the heater 33 of the thermal management flow channel 3 of the battery pack can be selectively started to heat the liquid cooling medium, thereby further heating/preserving the heat of the battery pack 100.
In the standby mode, the compressor 11 and the throttling device 13 of the refrigeration module are stopped, the fan 231 of the heat radiation water tank 23 is stopped, and the liquid cooling medium circulation of the main heat management flow channel 2 and the liquid cooling medium circulation of the battery pack heat management flow channel 3 are stopped.
Specifically, when the compressor 11 enters a refrigeration mode (as shown in fig. 2), an a port and a d port of a branch switching valve 24 of a main heat management flow channel 2 are communicated, a b port and a c port of the branch switching valve 24 of the main heat management flow channel 2 are communicated, and an a port and a c port of a first bypass switching valve 25 are communicated to enable the main heat management flow channel 2 and a battery pack heat management flow channel 3 to form mutually independent liquid cooling medium circulation;
When the cooling mode of the water tank is entered (as shown in figure 3), the port c and the port d of the branch switching valve 24 of the main heat management flow channel 2 are communicated, the port a and the port b of the branch switching valve 24 of the main heat management flow channel 2 are communicated, the port a and the port c of the first bypass switching valve 25 are communicated, so that the main heat management flow channel 2 and the battery heat management flow channel 3 form liquid cooling medium circulation in a serial connection mode;
When the waste heat utilization mode is entered (as shown in fig. 4), the port c and the port d of the branch switching valve 24 of the main heat management flow channel 2 are communicated, the port a and the port b of the branch switching valve 24 of the main heat management flow channel 2 are communicated, the port b and the port c of the first bypass switching valve 25 are communicated, the main heat management flow channel 2 and the battery pack heat management flow channel 3 form liquid cooling medium circulation in a serial connection mode, and the heat dissipating water tank 23 cuts out liquid cooling medium circulation;
when the battery self-circulation mode/the battery heat preservation mode is entered (as shown in fig. 5), the port a and the port d of the branch switching valve 24 of the main heat management flow channel 2 are communicated, the port b and the port c of the branch switching valve 24 of the main heat management flow channel 2 are closed, the liquid cooling medium circulation of the main heat management flow channel 2 is stopped, and the battery pack heat management flow channel 3 forms independent liquid cooling medium circulation.
In the dual-temperature-zone liquid-cooled thermal management system, the operation method of the thermal management system and the vehicle of the embodiment, under the control of the bypass switching valve 24 of the main thermal management flow channel 2, the main thermal management flow channel 2 and the battery thermal management flow channel 3 can selectively form independent liquid-cooled medium circulation, the main thermal management flow channel 2 and the battery thermal management flow channel 3 can also selectively form liquid-cooled medium circulation in a serial connection mode, the main thermal management flow channel 2 can cut or cut the heat-dissipating water tank 23 into or out of liquid-cooled medium circulation in a bypass mode, the main thermal management flow channel 2 can cut or cut the liquid-cooled medium channel of the condenser 12 of the refrigeration module into or out of liquid-cooled medium circulation in a bypass mode, and at least a plurality of operation modes such as a compressor 11 refrigeration mode, a water tank heat dissipation mode, a waste heat utilization mode, a battery self-circulation mode, a battery heat preservation mode and a standby mode can be provided, and the like can be provided, and the thermal management requirements of the vehicle under various excellent working conditions can be satisfied while the thermal management, the characteristics of rich and easy control, high integration and low energy consumption can be achieved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A double-temperature-zone liquid cooling type heat management system is applied to a vehicle, the vehicle comprises a battery pack and at least one electric energy conversion component,
The device comprises a refrigeration module, a main heat management flow channel and a battery pack heat management flow channel;
The refrigerating module comprises a compressor, a condenser, a throttling device and an evaporation heat exchanger, wherein refrigerant channels of the compressor, the condenser, the throttling device and the evaporation heat exchanger are sequentially and circularly communicated, so that refrigerant can circulate in the refrigerant channels of the compressor, the condenser, the throttling device and the evaporation heat exchanger;
the main heat management flow passage comprises a first circulating pump, a main flow passage heat exchanger, a radiating water tank with a fan and a branch switching valve, wherein the main flow passage heat exchanger can exchange heat with an electric energy conversion part of the vehicle, and liquid cooling medium passages of the first circulating pump, the main flow passage heat exchanger, the radiating water tank and the branch switching valve are sequentially and circularly communicated;
The battery pack heat management flow channel comprises a second circulating pump and a battery pack heat exchanger, the battery pack heat exchanger can exchange heat with a battery pack of the vehicle, and the second circulating pump, the battery pack heat exchanger, a branch switching valve of the main heat management flow channel and a liquid cooling medium channel of an evaporation heat exchanger of the refrigeration module are sequentially and circularly communicated;
the main heat management flow channel and the battery pack heat management flow channel can selectively form liquid cooling medium circulation independent of each other under the control of the branch switching valve of the main heat management flow channel, and the main heat management flow channel and the battery pack heat management flow channel can also selectively form liquid cooling medium circulation in a serial connection mode;
the main heat management runner can cut in or cut out the liquid cooling medium circulation of the radiating water tank in a bypass mode;
The main heat management flow channel can connect or cut out liquid cooling medium channels of the condenser of the refrigeration module to circulate in a branch way.
2. The dual-temperature-zone liquid-cooled thermal management system of claim 1, wherein the bypass switching valve of the main thermal management flow channel is a four-way valve comprising an a port, a b port, a c port and a d port which are opened/closed under control of an upper computer;
An a port of the bypass switching valve is communicated with a battery pack heat exchanger of the battery pack heat management flow channel, and a d port of the bypass switching valve is communicated with a liquid cooling medium channel of an evaporation heat exchanger of the refrigeration module;
The port b of the branch switching valve is communicated with the first circulating pump of the main heat management flow passage, and the port c of the branch switching valve is communicated with the radiating water tank of the main heat management flow passage.
3. The dual-temperature zone liquid cooled thermal management system of claim 1 or 2, wherein the primary thermal management runner further comprises a first bypass switching valve;
the first bypass switching valve can cut in or cut out the cooling water tank to circulate the liquid cooling medium in a bypass mode.
4. The dual-temperature-zone liquid-cooled thermal management system of claim 3, wherein the first bypass switching valve of the main thermal management flow channel is a three-way valve comprising an a port, a b port and a c port that are opened/closed under control of an upper computer;
the port a of the first bypass switching valve is communicated with the radiating water tank, the port c of the first bypass switching valve is communicated with the main runner heat exchanger, and the port b of the first bypass switching valve is communicated with the bypass switching valve.
5. The dual-temperature zone liquid cooled thermal management system of claim 1 or 2, wherein the primary thermal management runner further comprises a second bypass switching valve and a check valve;
The second bypass switching valve comprises two ports which are controlled by the upper computer to be opened/closed;
Two ports of the second bypass switching valve are respectively communicated with the outlet end of the radiating water tank and the inlet end of a liquid cooling medium channel of a condenser of the refrigeration module;
Two ports of the one-way valve are respectively communicated with the outlet end of the liquid cooling medium channel of the condenser of the refrigeration module and the inlet end of the radiating water tank.
6. The dual-temperature zone liquid cooled thermal management system of claim 1, wherein the battery pack thermal management runner further comprises a heater for heating a liquid cooled medium.
7. The dual-temperature zone liquid cooled thermal management system of claim 1, further comprising a first temperature sensor coupled to an inlet end of the radiator tank of the primary thermal management runner, a second temperature sensor coupled to an inlet end of the battery heat exchanger of the battery thermal management runner, a third temperature sensor coupled to an outlet end of the battery heat exchanger of the battery thermal management runner, and a fourth temperature sensor coupled to an inlet end of the primary runner heat exchanger of the primary thermal management runner.
8. A method of operating a thermal management system for use with the dual-temperature zone liquid cooled thermal management system of any one of claims 1-7, the method comprising:
According to at least one working condition signal of the vehicle and/or the double-temperature-zone liquid cooling type heat management system, selectively entering one of the following operation modes:
The compressor refrigeration mode comprises the steps of starting a compressor and a throttling device of a refrigeration module, starting a fan of a heat radiation water tank, enabling a main heat management flow channel and a battery pack heat management flow channel to form mutually independent liquid cooling medium circulation, enabling the liquid cooling medium of the main heat management flow channel to absorb heat of an electric energy conversion part through a main flow channel heat exchanger and radiate heat at the heat radiation water tank, enabling the liquid cooling medium of the battery pack heat management flow channel to absorb heat of a battery pack through a battery pack heat exchanger and radiate heat at an evaporation heat exchanger of the refrigeration module, and enabling the liquid cooling medium channel of a condenser of the refrigeration module to be connected into the liquid cooling medium circulation in a branch way;
The heat dissipation mode of the water tank comprises the steps of stopping the compressor and the throttling device of the refrigeration module, starting the fan of the heat dissipation water tank, enabling the main heat management flow channel and the battery pack heat management flow channel to form liquid cooling medium circulation in a serial mode, enabling the liquid cooling medium of the main heat management flow channel to absorb heat of the electric energy conversion component through the main flow channel heat exchanger and dissipate heat at the heat dissipation water tank, enabling the liquid cooling medium of the battery pack heat management flow channel to absorb heat of the battery pack through the battery pack heat exchanger and dissipate heat at the heat dissipation water tank of the main heat management flow channel, and enabling the liquid cooling medium channel of the condenser of the refrigeration module to be cut out of liquid cooling medium circulation;
The waste heat utilization mode comprises the steps of stopping a compressor and a throttling device of the refrigeration module, stopping a fan of the heat radiating water tank, enabling the main heat management flow channel and the battery pack heat management flow channel to form liquid cooling medium circulation in a serial mode, enabling the liquid cooling medium of the main heat management flow channel to absorb heat of the electric energy conversion component through the main flow channel heat exchanger, enabling the heat to be transferred to the battery pack through the battery pack heat exchanger of the battery pack heat management flow channel, enabling the heat radiating water tank to cut out liquid cooling medium circulation in a bypass mode, and enabling the liquid cooling medium channel of the condenser of the refrigeration module to be cut out of liquid cooling medium circulation;
A battery self-circulation mode/a battery heat preservation mode, wherein a compressor and a throttling device of the refrigeration module are stopped, a fan of the radiating water tank is stopped, and the liquid cooling medium circulation of the main heat management flow channel is stopped;
And in a standby mode, stopping the compressor and the throttling device of the refrigeration module, stopping the fan of the radiating water tank, and stopping the liquid cooling medium circulation of the main heat management flow channel and the liquid cooling medium circulation of the battery pack heat management flow channel.
9. The method of claim 8, wherein the bypass switching valve of the main thermal management flow channel is a four-way valve comprising an a port, a b port, a c port and a d port which are opened/closed by a host computer;
An a port of the bypass switching valve is communicated with a battery pack heat exchanger of the battery pack heat management flow channel, and a d port of the bypass switching valve is communicated with a liquid cooling medium channel of an evaporation heat exchanger of the refrigeration module;
The port b of the branch switching valve is communicated with the first circulating pump of the main heat management flow passage, and the port c of the branch switching valve is communicated with the radiating water tank of the main heat management flow passage;
the primary thermal management runner further includes a first bypass switching valve;
the first bypass switching valve can cut in or cut out the liquid cooling medium to circulate in a bypass mode;
The first bypass switching valve of the main thermal management flow channel is a three-way valve and comprises an a port, a b port and a c port which are controlled by an upper computer to be opened/closed;
An a port of the first bypass switching valve is communicated with the radiating water tank, a c port of the first bypass switching valve is communicated with the main runner heat exchanger, and a b port of the first bypass switching valve is communicated with the bypass switching valve;
the main thermal management flow channel further comprises a second bypass switching valve and a one-way valve;
The second bypass switching valve comprises two ports which are controlled by the upper computer to be opened/closed;
Two ports of the second bypass switching valve are respectively communicated with the outlet end of the radiating water tank and the inlet end of a liquid cooling medium channel of a condenser of the refrigeration module;
two ports of the one-way valve are respectively communicated with the outlet end of the liquid cooling medium channel of the condenser of the refrigeration module and the inlet end of the radiating water tank;
When the compressor enters a refrigeration mode, an a port and a d port of a branch switching valve of the main heat management flow channel are communicated, a b port and a c port of the branch switching valve of the main heat management flow channel are communicated, and the a port and the c port of the first bypass switching valve are communicated, so that the main heat management flow channel and the battery pack heat management flow channel form mutually independent liquid cooling medium circulation;
When the water tank heat dissipation mode is entered, a port c and a port d of a branch switching valve of the main heat management flow channel are communicated, a port a and a port b of the branch switching valve of the main heat management flow channel are communicated, and the port a and the port c of the first bypass switching valve are communicated, so that the main heat management flow channel and the battery pack heat management flow channel form liquid cooling medium circulation in a serial connection mode;
when the waste heat utilization mode is entered, a port c and a port d of a branch switching valve of the main heat management flow channel are communicated, a port a and a port b of the branch switching valve of the main heat management flow channel are communicated, and a port b and a port c of the first bypass switching valve are communicated, so that the main heat management flow channel and the battery pack heat management flow channel form liquid cooling medium circulation in a serial connection mode, and the heat dissipating water tank cuts out liquid cooling medium circulation;
When the battery self-circulation mode/the battery heat preservation mode is entered, an a port and a d port of a branch switching valve of the main heat management flow channel are communicated, a b port and a c port of the branch switching valve of the main heat management flow channel are closed, so that the liquid cooling medium circulation of the main heat management flow channel is stopped, and the battery pack heat management flow channel forms independent liquid cooling medium circulation.
10. A vehicle comprising a dual temperature zone liquid cooled thermal management system according to any one of claims 1-7.
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| CN115675013A (en) * | 2022-11-21 | 2023-02-03 | 上海银轮热交换系统有限公司 | Multi-working-condition finished automobile thermal management system and method for new energy electric automobile |
| CN115709630A (en) * | 2022-11-18 | 2023-02-24 | 中通客车股份有限公司 | New energy vehicle thermal management system and method |
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| CN115709630A (en) * | 2022-11-18 | 2023-02-24 | 中通客车股份有限公司 | New energy vehicle thermal management system and method |
| CN115675013A (en) * | 2022-11-21 | 2023-02-03 | 上海银轮热交换系统有限公司 | Multi-working-condition finished automobile thermal management system and method for new energy electric automobile |
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