Vehicle thermal management system

Abstract

The utility model discloses a vehicle thermal management system which comprises an electric drive cooling system, an air conditioning system and a battery management system. The electric drive cooling system is communicated with the air conditioning system and the battery management system, the air conditioning system is communicated with the battery management system, and the electric drive cooling system, the air conditioning system and the battery management system can be selected according to the working state of the vehicle. The beneficial effects of the utility model are that the front-end module assembly is integrated with an electric drive cooling system radiator, a cockpit refrigeration loop, a first refrigeration loop, a second refrigeration loop and a heating loop, so that the performance requirements of a thermal management system under various working conditions of driving, conventional charging and rapid charging can be met; in addition, through integrated design of the battery management system, the air conditioning system and the electric drive cooling system and in combination with the control strategy of the whole vehicle thermal management system, the performance requirements of the whole vehicle thermal management system under different working conditions can be met, the energy consumption of the thermal management system is reduced, and the cost, weight and whole vehicle arrangement difficulty of the whole vehicle battery thermal management system are reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a vehicle thermal management system. Background Technology

[0002] In recent years, with the increase in battery capacity, voltage platform, and charging power of pure electric heavy-duty trucks, the performance requirements for vehicle battery thermal management have also been continuously increasing. Currently, most pure electric heavy-duty trucks use either independent thermal management units for their battery thermal management systems, often found in traditional fuel-to-electric conversion models, or the battery thermal management system is integrated with the air conditioning system, which reduces the space required for the thermal management system and facilitates weight reduction and cost reduction. Both solutions can meet the battery pack cooling requirements during driving and regular charging. However, with the continuous increase in charging power of charging piles, the maximum cooling performance of both solutions will eventually be insufficient to meet the battery pack cooling requirements during supercharging.

[0003] To meet the battery pack cooling requirements during supercharging, a standalone battery thermal management unit solution can increase the cooling performance of the unit by increasing the compressor displacement and the size of components such as plate heat exchangers and condensers. However, this increases the complexity of vehicle layout, as well as cost and weight. The integrated battery thermal management system with the air conditioning system is limited by the condenser's placement, making it impossible to increase heat exchange by enlarging its size. Furthermore, the cooling performance of a single compressor is limited. Therefore, a standalone integrated solution is unlikely to meet the battery pack cooling requirements during supercharging.

[0004] To address this, the inventor designed a vehicle thermal management system. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems existing in the above or prior art, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a vehicle thermal management system that can solve the problem of high performance requirements for the vehicle battery thermal management system when the large-capacity power battery is overcharged. At the same time, through the integrated design of the battery thermal management system, air conditioning system and electric drive cooling system, combined with the vehicle thermal management system control strategy, it can adapt to the performance requirements of the vehicle thermal management system under different operating conditions. It can not only reduce the energy consumption of the thermal management system and increase the driving range, but also reduce the cost of the vehicle battery thermal management system and the difficulty of vehicle layout.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vehicle thermal management system, which includes an electric drive cooling system, an air conditioning system, and a battery management system; the electric drive cooling system is connected to the air conditioning system and the battery management system, the air conditioning system is connected to the battery management system, the electric drive cooling system can dissipate heat and cool, the air conditioning system can cool the battery management system, the battery management system can perform thermal management of the battery, and the electric drive cooling system, the air conditioning system, and the battery management system can be selected according to the vehicle's operating status.

[0009] As a preferred embodiment of the vehicle thermal management system of this utility model, in the normal state, the electric drive cooling system includes an electric drive cooling circuit, which includes a front-end module assembly. The front-end module assembly is connected to an electric drive chilled water pump, which is connected to a multi-function module. The multi-function module is connected to an MCU controller, which is connected to a drive unit. The drive unit is connected to the front-end module assembly through the A1 and A2 lines of a proportional three-way valve. The multi-function module, the drive unit, and the MCU controller are cooled by a radiator on the front-end module assembly.

[0010] As a preferred embodiment of the vehicle thermal management system of this utility model, the air conditioning system includes a cockpit cooling circuit, which includes a first electric compressor. The first electric compressor is connected in parallel with a first air conditioning unit and a second air conditioning unit. The first air conditioning unit and the second air conditioning unit are respectively connected to a first electromagnetic expansion valve and a second electromagnetic expansion valve. The first electromagnetic expansion valve and the second electromagnetic expansion valve are connected to the front-end module assembly. The first electromagnetic expansion valve and the second electromagnetic expansion valve can control the on / off state of the first air conditioning unit and the second air conditioning unit. The first air conditioning unit and the second air conditioning unit can cool the vehicle cockpit.

[0011] As a preferred embodiment of the vehicle thermal management system of this utility model, the air conditioning system further includes a first refrigeration circuit, which includes a first battery cooler connected to the cockpit refrigeration circuit. One end of the first battery cooler is connected to a first electronic expansion valve. The first electronic expansion valve is connected in parallel with a first electromagnetic expansion valve and a second electromagnetic expansion valve. The first battery cooler is connected to the A1 and A3 lines of an electromagnetic three-way valve. The electromagnetic three-way valve is connected to the first battery pack and the second battery pack through a battery cooling water pump. The first battery pack and the second battery pack dissipate heat through the first battery cooler. The cockpit refrigeration circuit cools the first battery pack and the second battery pack.

[0012] In a preferred embodiment of the vehicle thermal management system of this utility model, the electric drive cooling circuit is not in operation during fast charging, and the battery management system includes a cabin cooling circuit and a first cooling circuit; the cabin cooling circuit cools the first battery pack and the second battery pack through the first cooling circuit, and the refrigerant dissipates heat through the air conditioning condenser on the front-end module assembly.

[0013] As a preferred embodiment of the vehicle thermal management system of this utility model, the battery management system further includes a second refrigeration circuit, which includes a second battery cooler connected to a second electric compressor. The second battery cooler is connected to the front-end module assembly via a second electronic expansion valve and is also connected to the first battery cooler. The second battery cooler can cool the coolant in the first and second battery packs, and the thermal management condenser on the front-end module assembly can dissipate heat.

[0014] As a preferred embodiment of the vehicle thermal management system of this utility model, in the battery heating state under low-temperature charging, the electric drive cooling circuit, the cockpit cooling circuit, the first cooling circuit, and the second cooling circuit are not working. The battery management system also includes a battery heating circuit, which includes a battery cooling water pump. The battery cooling water pump is connected to the first battery pack and the second battery pack. The first battery pack and the second battery pack are connected to a multi-way module. The multi-way module is connected to the A2 channel of the electromagnetic three-way valve through a PTC heater. The A3 channel of the electromagnetic three-way valve is connected to the battery cooling water pump. The first battery pack and the second battery pack are heated by the PTC heater.

[0015] As a preferred embodiment of the vehicle thermal management system of this utility model, in the battery cooling state under low-temperature charging, the A3 line on the proportional three-way valve in the electric drive cooling circuit is connected to the multi-way module, the coolant in the electric drive cooling circuit is dissipated through the assembly radiator on the front-end module assembly, the first refrigeration circuit and the second refrigeration circuit are connected to the multi-way module, and the multi-way module can mix the coolant in the electric drive cooling circuit and the first refrigeration circuit and the second refrigeration circuit and cool the first battery pack and the second battery pack.

[0016] As a preferred embodiment of the vehicle thermal management system of this utility model, the proportional three-way valve can control the water inlet temperature of the first battery pack and the second battery pack by adjusting its own opening degree and the fan speed of the front-end module assembly.

[0017] As a preferred embodiment of the vehicle thermal management system of this utility model, in the driving assistance mode, the A1 path of the electromagnetic three-way valve is closed, the electric drive cooling circuit is connected to the multi-way module through the A3 path of the proportional three-way valve, the multi-way module mixes the coolant in the electric drive cooling circuit with the coolant in the first and second battery packs, the multi-way module is connected to the A3 path of the electromagnetic three-way valve through the PTC heater, the A2 path of the electromagnetic three-way valve is connected to the battery cooling water pump, the battery cooling water pump is connected to the first and second battery packs, and the first and second battery packs can be heated by the residual heat in the electric drive cooling circuit.

[0018] The beneficial effects of this utility model are as follows: The front-end module assembly integrates the electric drive cooling system radiator, the integrated cockpit cooling circuit, the first cooling circuit, the second cooling circuit, and the heating circuit. It can not only meet the performance requirements of the thermal management system under various operating conditions such as driving, regular charging, and fast charging, but also adapt to the performance requirements of the vehicle thermal management system under different operating conditions through the integrated design of the battery management system, air conditioning system, and electric drive cooling system, combined with the vehicle thermal management system control strategy. This reduces the energy consumption of the thermal management system, increases the driving range, and also reduces the cost, weight, and overall layout difficulty of the vehicle battery thermal management system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the vehicle thermal management system. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Example 1

[0024] Reference Figure 1This is the first embodiment of the present invention. This embodiment provides a vehicle thermal management system, specifically including: an electric drive cooling system, an air conditioning system, and a battery management system; the electric drive cooling system is connected to the air conditioning system and the battery management system, the air conditioning system is connected to the battery management system, the electric drive cooling system can dissipate heat and cool, the air conditioning system can cool the battery management system, the battery management system can perform thermal management of the battery, and the electric drive cooling system, the air conditioning system, and the battery management system can be selected according to the vehicle's operating status.

[0025] Ideally, the appropriate system can be automatically selected to operate based on the vehicle's condition, adapting to the performance requirements of the vehicle's thermal management system under different operating conditions, reducing the energy consumption of the thermal management system, increasing the driving range, and also reducing the cost, weight, and layout difficulty of the vehicle's battery thermal management system.

[0026] Furthermore, under normal conditions, the electric drive cooling system includes an electric drive cooling circuit, which includes a front-end module assembly 1. The front-end module assembly 1 is connected to the electric drive chilled water pump 2, the electric drive chilled water pump 2 is connected to the multi-function module 3, the multi-function module 3 is connected to the MCU controller 4, the MCU controller 4 is connected to the drive unit 5, and the drive unit 5 is connected to the front-end module assembly 1 through the A1 and A2 lines of the proportional three-way valve 6. The multi-function module 3, the drive unit 5, and the MCU controller 4 are cooled by the heat sink on the front-end module assembly 1.

[0027] Furthermore, the air conditioning system includes a cockpit cooling circuit, which includes a first electric compressor 7. The first electric compressor 7 is connected in parallel with a first air conditioning unit 8 and a second air conditioning unit 9. The first air conditioning unit 8 and the second air conditioning unit 9 are respectively connected to a first electromagnetic expansion valve 10 and a second electromagnetic expansion valve 11. The first electromagnetic expansion valve 10 and the second electromagnetic expansion valve 11 are connected to the front-end module assembly 1. The first electromagnetic expansion valve 10 and the second electromagnetic expansion valve 11 can control the on / off state of the first air conditioning unit 8 and the second air conditioning unit 9. The first air conditioning unit 8 and the second air conditioning unit 9 can cool the vehicle cockpit.

[0028] Furthermore, the air conditioning system also includes a first refrigeration circuit, which includes a first battery cooler 12 connected to the cockpit refrigeration circuit. One end of the first battery cooler 12 is connected to a first electronic expansion valve 13. The first electronic expansion valve 13 is connected in parallel with a first electromagnetic expansion valve 10 and a second electromagnetic expansion valve 11. The first battery cooler 12 is connected to the A1 and A3 lines of an electromagnetic three-way valve 14. The electromagnetic three-way valve 14 is connected to a first battery pack 16 and a second battery pack 17 through a battery cooling water pump 15. The first battery pack 16 and the second battery pack 17 dissipate heat through the first battery cooler 12. The cockpit refrigeration circuit cools the first battery pack 16 and the second battery pack 17.

[0029] Ideally, the vehicle should be in driving condition or using a conventional charging station with a charging current ≤400A.

[0030] The A1 and A2 lines of the proportional three-way valve 6 in the electric drive cooling circuit are connected to the front-end module assembly 1, while the A3 line is closed. The electric drive chilled water pump 2 is connected to the radiator and drive unit 5 of the front-end module assembly 1, and the electric drive chilled water pump 2 is connected to the fan of the front-end module assembly 1. The multi-function module 3, drive unit 5, and MCU controller 4 are cooled by the radiator on the front-end module assembly 1. The first electric compressor 7 in the cockpit cooling circuit is connected to the fan of the front-end module assembly 1, and the refrigerant is cooled by the integrated air conditioning condenser on the front-end module assembly 1. When the air conditioning requires cooling, the first electromagnetic expansion valve 10 and the second electromagnetic expansion valve 11 open. The blowers of the first air conditioning unit 8 and the second air conditioning unit 9 operate, cooling the passenger compartment through the evaporator of the air conditioning unit assembly. When the battery pack has a cooling demand, the first electronic expansion valve 13 opens, cooling the coolant in the circuit of the first battery pack 16 and the second battery pack 17 through the first battery cooler 12. The first battery cooler 12 is connected to the A1 and A3 lines of the electromagnetic three-way valve 14, while the A2 line is closed. The battery cooling water pump 15 is connected to the circuit of the first battery cooler 12, and the second battery cooler 18 is connected to the circuit of the first battery pack 16 and the second battery pack 17. The battery cooling water pump 15 operates, and the battery pack dissipates heat through the first battery cooler 12.

[0031] Furthermore, in fast charging mode, the electric drive cooling circuit does not work, and the battery management system includes a cockpit cooling circuit and a first cooling circuit; the cockpit cooling circuit cools the first battery pack 16 and the second battery pack 17 through the first cooling circuit, and the refrigerant dissipates heat through the air conditioning condenser on the front-end module assembly 1.

[0032] Furthermore, the battery management system also includes a second cooling circuit, which includes a second battery cooler 18. The second battery cooler 18 is connected to the second electric compressor 19. The second battery cooler 18 is connected to the front-end module assembly 1 through the second electronic expansion valve 20. The second battery cooler 18 is also connected to the first battery cooler 12. The second battery cooler 18 can cool the coolant in the first battery pack 16 and the second battery pack 17. The thermal management condenser on the front-end module assembly 1 can dissipate heat.

[0033] Ideally, the vehicle should be charged using a fast charging station with a charging current greater than 400A.

[0034] During charging, the electric drive cooling circuit is not working; the first electric compressor 7 and the fan of the front-end module assembly 1 are working, and the refrigerant is dissipated through the air conditioning condenser on the front-end module assembly 1. The first electronic expansion valve 13 is open, and the coolant in the battery cooling circuit is cooled through the first battery cooler 12; the second electric compressor 19 is working, the second electronic expansion valve 20 is open, and the refrigerant is dissipated through the condenser on the front-end module assembly 1. The coolant in the cooling circuit of the first battery pack 16 and the second battery pack 17 is cooled through the second battery cooler 18; the A1 and A3 channels on the electromagnetic three-way valve 14 are open, and the battery cooling water pump 15 is connected to the first battery cooler 12, and the second battery cooler 18 is connected to the first battery pack 16 and the second battery pack 17. The battery cooling water pump 15 is working, and the battery pack is cooled through the first battery cooler 12 and the second battery cooler 18.

[0035] Furthermore, in the battery heating state under low-temperature charging, the electric drive cooling circuit, cockpit cooling circuit, first cooling circuit, and second cooling circuit are not working. The battery management system also includes a battery heating circuit, which includes a battery cooling water pump 15. The battery cooling water pump 15 is connected to the first battery pack 16 and the second battery pack 17. The first battery pack 16 and the second battery pack 17 are connected to a multi-way module 21. The multi-way module 21 is connected to the A2 channel of the electromagnetic three-way valve 14 through a PTC heater 22. The A3 channel of the electromagnetic three-way valve 14 is connected to the battery cooling water pump 15. The first battery pack 16 and the second battery pack 17 are heated by the PTC heater 22.

[0036] Preferably, in the battery heating state under low-temperature charging, the electric drive cooling circuit, the cockpit cooling circuit, the first cooling circuit, and the second cooling circuit are not working; the A1 line of the electromagnetic three-way valve 14 is closed, the A2 and A3 lines are open, the battery cooling water pump 15 is connected to the PTC heater 22 and the first battery pack 16 and the second battery pack 17 circuits are connected, the battery cooling water pump 15 and the PTC heater 22 are working, and the battery pack is heated through the PTC heater 22.

[0037] Furthermore, in the battery cooling state under low-temperature charging, the A3 line on the proportional three-way valve 6 in the electric drive cooling circuit is connected to the multi-way module 21. The coolant in the electric drive cooling circuit is dissipated through the assembly heat sink on the front-end module assembly 1. The first refrigeration circuit and the second refrigeration circuit are connected to the multi-way module 21. The multi-way module 21 can mix the coolant in the electric drive cooling circuit and the first and second refrigeration circuits and cool the first battery pack 16 and the second battery pack 17.

[0038] Furthermore, the proportional three-way valve 6 can control the inlet water temperature of the first battery pack 16 and the second battery pack 17 by adjusting its own opening degree and the fan speed of the front-end module assembly 1.

[0039] Preferably, when the ambient temperature is below 5°C and the battery pack requires cooling during charging, the electromagnetic three-way valves 14A2 and A3 open, activating the battery cooling water pump 15. The A3 channel on the proportional three-way valve 6 opens, allowing the coolant in the electric drive cooling circuit to be cooled by the radiator on the front-end module assembly 1. Simultaneously, the coolant in the electric drive cooling circuit mixes with the coolant in the cooling circuits of the first battery pack 16 and the second battery pack 17 via the multi-port module 21 through the A3 channel on the proportional three-way valve 6, further cooling the battery pack. The battery pack inlet water temperature can be controlled by adjusting the proportional three-way valve 6 and the fan speed of the front-end module assembly 1. When the battery pack inlet water temperature exceeds 18°C, it is necessary to switch to normal charging or fast charging mode. The cockpit cooling circuit, the first cooling circuit, and the second cooling circuit operate as needed, and the battery pack coolant is cooled by the first battery cooler 12 and the second battery cooler 18.

[0040] Furthermore, in the driving assistance mode, the A1 path of the electromagnetic three-way valve 14 is closed, and the electric drive cooling circuit is connected to the multi-way module 21 through the A3 path of the proportional three-way valve 6. The multi-way module 21 mixes the coolant in the electric drive cooling circuit with the coolant in the first battery pack 16 and the second battery pack 17. The multi-way module 21 is connected to the A2 path of the electromagnetic three-way valve 14 through the PTC heater 22. The A3 path of the electromagnetic three-way valve 14 is connected to the battery cooling water pump 15. The battery cooling water pump 15 is connected to the first battery pack 16 and the second battery pack 17. The residual heat in the electric drive cooling circuit can heat the first battery pack 16 and the second battery pack 17.

[0041] Preferably, during low-temperature driving, when the battery pack temperature is low, the waste heat from the electric drive cooling circuit can be used to heat the battery pack. With the electromagnetic three-way valve 14A1 closed and A2 and A3 open, the battery coolant pump 15, PTC heater 22, and the circuits of the first battery pack 16 and the second battery pack 17 are connected. The A3 channel of the electric drive cooling circuit proportional three-way valve 6 is also open, allowing the battery coolant pump 15 and PTC heater 22 to operate. The coolant in the electric drive cooling circuit mixes with the coolant in the battery pack through the proportional three-way valve 6 and the multi-way module 21, utilizing the waste heat from the electric drive cooling circuit to heat the first battery pack 16 and the second battery pack 17. When the electric drive circuit coolant temperature is too high, the battery pack inlet water temperature can be controlled by adjusting the opening of the proportional three-way valve 6.

[0042] In summary, the front-end module assembly 1 integrates the electric drive cooling system radiator, the integrated cockpit cooling circuit, the first cooling circuit, the second cooling circuit, and the heating circuit. It can not only meet the performance requirements of the thermal management system under various operating conditions such as driving, regular charging, and fast charging, but also adapt to the performance requirements of the vehicle thermal management system under different operating conditions through the integrated design of the battery management system, air conditioning system, and electric drive cooling system, combined with the vehicle thermal management system control strategy. This reduces the energy consumption of the thermal management system, increases the driving range, and also reduces the cost, weight, and overall vehicle layout difficulty of the vehicle battery thermal management system.

[0043] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0044] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0045] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vehicle thermal management system, characterized by: The system comprises an electric drive cooling system, an air conditioning system, and a battery management system; the electric drive cooling system is in communication with the air conditioning system and the battery management system; the air conditioning system is in communication with the battery management system; the electric drive cooling system can be cooled by heat dissipation; the air conditioning system can be refrigerated; the air conditioning system can cool the battery management system; the battery management system can manage the battery; the electric drive cooling system, the air conditioning system, and the battery management system can be selected according to the working state of the vehicle.

2. The vehicle thermal management system of claim 1, wherein: In a normal state, the electric drive cooling system comprises an electric drive cooling circuit, the electric drive cooling circuit comprises a front-end module assembly (1), the front-end module assembly (1) is in communication with an electric drive cooling water pump (2), the electric drive cooling water pump (2) is in communication with a multi-in-one module (3), the multi-in-one module (3) is in communication with an MCU controller (4), the MCU controller (4) is in communication with a driving part (5), the driving part (5) is in communication with the front-end module assembly (1) through A1 and A2 paths of a proportional three-way valve (6), the multi-in-one module (3), the driving part (5), and the MCU controller (4) are cooled by a radiator on the front-end module assembly (1).

3. The vehicle thermal management system of claim 2, wherein: The air conditioning system comprises a cockpit refrigeration circuit, the cockpit refrigeration circuit comprises a first electric compressor (7), the first electric compressor (7) is in parallel communication with a first air conditioning box (8) and a second air conditioning box (9), the first air conditioning box (8) and the second air conditioning box (9) are connected with a first electromagnetic expansion valve (10) and a second electromagnetic expansion valve (11) respectively, the first electromagnetic expansion valve (10) and the second electromagnetic expansion valve (11) are in communication with the front-end module assembly (1), the first electromagnetic expansion valve (10) and the second electromagnetic expansion valve (11) can control the first air conditioning box (8) and the second air conditioning box (9) to be turned on or off, and the first air conditioning box (8) and the second air conditioning box (9) can cool the vehicle cockpit.

4. The vehicle thermal management system of claim 3, wherein: The air conditioning system further comprises a first refrigeration circuit, the first refrigeration circuit comprises a first battery cooler (12) in communication with the cockpit refrigeration circuit, one end of the first battery cooler (12) is in communication with a first electronic expansion valve (13), the first electronic expansion valve (13) is in parallel with the first electromagnetic expansion valve (10) and the second electromagnetic expansion valve (11), the first battery cooler (12) is in communication with A1 and A3 paths of an electromagnetic three-way valve (14), the electromagnetic three-way valve (14) is in communication with a first battery pack (16) and a second battery pack (17) through a battery cooling water pump (15), the first battery pack (16) and the second battery pack (17) are cooled by the first battery cooler (12), and the cockpit refrigeration circuit refrigerates the first battery pack (16) and the second battery pack (17).

5. The vehicle thermal management system of claim 4, wherein: In a fast charging state, the electric drive cooling circuit does not work, and the battery management system comprises the cockpit refrigeration circuit and the first refrigeration circuit; the cockpit refrigeration circuit refrigerates the first battery pack (16) and the second battery pack (17) through the first refrigeration circuit, and the refrigerant is cooled by an air conditioning condenser on the front-end module assembly (1).

6. The vehicle thermal management system of claim 5, wherein: The battery management system further comprises a second refrigeration circuit, the second refrigeration circuit comprises a second battery cooler (18), the second battery cooler (18) is communicated with a second electric compressor (19), the second battery cooler (18) is communicated with the front-end module assembly (1) through a second electronic expansion valve (20), the second battery cooler (18) is connected in parallel with the first battery cooler (12), the second battery cooler (18) can cool the cooling liquid in the first battery pack (16) and the second battery pack (17), and the thermal management condenser on the front-end module assembly (1) can dissipate heat.

7. The vehicle thermal management system of claim 6, wherein: The battery heating state under low-temperature charging, the electric drive cooling circuit, the cabin refrigeration circuit, the first refrigeration circuit and the second refrigeration circuit are not worked, the battery management system further comprises a battery heating circuit, the battery heating circuit comprises a battery cooling water pump (15), the battery cooling water pump (15) is communicated with the first battery pack (16) and the second battery pack (17), the first battery pack (16) and the second battery pack (17) are communicated with a multi-way module (21), the multi-way module (21) is communicated with a A2 road of the electromagnetic three-way valve (14) through a PTC heater (22), and a A3 road of the electromagnetic three-way valve (14) is communicated with the battery cooling water pump (15); the first battery pack (16) and the second battery pack (17) are heated through the PTC heater (22).

8. The vehicle thermal management system of claim 6, wherein: The battery cooling state under low-temperature charging, a A3 road of a proportional three-way valve (6) in the electric drive cooling circuit is communicated with the multi-way module (21), the cooling liquid in the electric drive cooling circuit is dissipated through an assembly radiator on the front-end module assembly (1), the first refrigeration circuit and the second refrigeration circuit are communicated with the multi-way module (21), and the multi-way module (21) can mix the cooling liquid in the electric drive cooling circuit and the first refrigeration circuit and the second refrigeration circuit and cool the first battery pack (16) and the second battery pack (17).

9. The vehicle thermal management system of claim 8, wherein: The proportional three-way valve (6) can control the water inlet temperature of the first battery pack (16) and the second battery pack (17) by adjusting the opening degree and the fan rotating speed of the front-end module assembly (1).

10. The vehicle thermal management system of claim 9, wherein: The auxiliary driving condition, a A1 road of the electromagnetic three-way valve (14) is closed, the electric drive cooling circuit is communicated with the multi-way module (21) through a A3 road of the proportional three-way valve (6), the multi-way module (21) mixes the cooling liquid in the electric drive cooling circuit and the first battery pack (16) and the second battery pack (17), the multi-way module (21) is communicated with a A3 road of the electromagnetic three-way valve (14) through the PTC heater (22), a A2 road of the electromagnetic three-way valve (14) is communicated with the battery cooling water pump (15), the battery cooling water pump (15) is connected with the first battery pack (16) and the second battery pack (17), and the first battery pack (16) and the second battery pack (17) are heated through the waste heat in the electric drive cooling circuit.

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