Thermal management system of vehicle and vehicle

Abstract

The present application provides a vehicle thermal management system and a vehicle, which are applied in the field of vehicle thermal management. The thermal management system of the vehicle includes a battery temperature equalization circuit and a battery direct cooling circuit; the battery temperature equalization circuit includes a dual-medium cold plate and a motor water pump in a motor liquid cooling system; the dual-medium cold plate is arranged at the battery module of the vehicle, including a refrigerant flow channel and a coolant flow channel; the coolant flow channel and the motor water pump are connected to form a circuit; the battery direct cooling circuit includes a refrigerant flow channel and a refrigerant system; the refrigerant flow channel is connected to the refrigerant system. The present application can use a battery direct cooling circuit and a battery temperature equalization circuit to simultaneously perform thermal management on the battery module. When the temperature difference between the battery cells in the battery module is large, the battery temperature equalization circuit can be operated to reduce the temperature difference between the battery cells and avoid affecting the performance and life of the battery module.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle thermal management, and in particular to a vehicle thermal management system and a vehicle. Background Art

[0002] The vehicle's thermal management system is a critical system in the vehicle that ensures the vehicle remains within the optimum or optimal temperature range under various operating conditions. The vehicle's thermal management system maintains the operating temperature of the engine, battery modules, motors and other key components, which helps ensure that these components operate efficiently and extend their service life while ensuring the comfort of the passenger compartment.

[0003] In the related art, when thermally managing the battery modules in a vehicle, the refrigerant in the vehicle's air conditioner is usually used to cool the battery modules. However, the inventors have found that this method can easily lead to a large temperature difference between the battery cells in the battery module, thereby affecting the performance and life of the battery module. Summary of the invention

[0004] The embodiments of the present application provide a vehicle thermal management system and a vehicle to solve the problem in the related art that when thermal management is performed on the battery module of the vehicle, a large temperature difference between the cells in the battery module is easily caused, thereby affecting the performance and life of the battery module.

[0005] In a first aspect, an embodiment of the present application provides a thermal management system for a vehicle, which may include a battery temperature equalization circuit and a battery direct cooling circuit;

[0006] The battery temperature equalization circuit includes a dual-medium cold plate and a motor water pump in the motor liquid cooling system; the dual-medium cold plate is arranged at the battery module of the vehicle, and includes a refrigerant flow channel and a coolant flow channel; the coolant flow channel and the motor water pump are connected to form a circuit;

[0007] The battery direct cooling circuit includes a refrigerant flow channel and a refrigerant system; the refrigerant flow channel is connected to the refrigerant system.

[0008] The thermal management system of the vehicle provided in the embodiment of the present application uses a dual-medium cold plate disposed at the battery module of the vehicle, so that both refrigerant and coolant can flow through the battery module. The battery module can be cooled by a battery direct cooling circuit, or by a battery temperature equalization circuit for rapid cooling and temperature equalization. The battery module can also be thermally managed simultaneously by a battery direct cooling circuit and a battery temperature equalization circuit. When the temperature difference between the cells in the battery module is large, the battery temperature equalization circuit can be operated to reduce the temperature difference between the cells and avoid affecting the performance and life of the battery module. In addition, when the battery module is in thermal runaway, the battery direct cooling circuit cannot work, and the battery temperature equalization circuit can be used to cool the battery module to avoid performance degradation or failure of the battery module.

[0009] In one possible implementation, the thermal management system of the vehicle further includes a first battery liquid thermal circuit;

[0010] The first battery liquid heat circuit includes an air conditioning water pump, a first PTC heater, a heater core, a coolant flow channel and a motor water pump;

[0011] The first end of the coolant flow channel is connected to the first end of the heater core, the second end of the heater core is connected to the first end of the first PTC heater, the second end of the first PTC heater is connected to the first end of the air conditioning water pump, the second end of the air conditioning water pump is connected to the first end of the motor water pump, and the second end of the motor water pump is connected to the second end of the coolant flow channel.

[0012] In an embodiment of the present application, the thermal management system of the vehicle is provided with a first battery liquid thermal circuit. When the battery temperature is low, the battery module can be heated by the first battery liquid thermal circuit to prevent the battery module temperature from being too low. The first battery liquid thermal circuit utilizes the first PTC heater in the heating circuit of the air conditioner in the vehicle to heat the coolant, and then heats the battery module by the coolant. There is no need to add additional heating equipment at the battery module, which can save costs and reduce the weight of the vehicle.

[0013] In a possible implementation, the battery temperature equalization circuit and the first battery liquid heat circuit both further include a first three-way valve;

[0014] The first end of the first three-way valve is connected to the first end of the heater core, the second end of the first three-way valve is connected to the first end of the coolant flow channel, and the third end of the first three-way valve is connected to the first end of the motor water pump;

[0015] When the first battery liquid heat circuit is in operation, the first end of the first three-way valve is connected to the second end of the first three-way valve;

[0016] When the battery temperature equalizing circuit is working, the second end of the first three-way valve is connected to the third end of the first three-way valve.

[0017] The embodiment of the present application adds a first three-way valve, so that the flow direction of the coolant therein can be controlled by the flow direction of the first three-way valve, so that different circuits can work.

[0018] In a possible implementation, the thermal management system of the vehicle further includes a second battery liquid thermal circuit; the motor liquid cooling system further includes a motor subsystem;

[0019] The second battery liquid heat circuit includes a motor water pump, a motor subsystem and a coolant flow channel;

[0020] The first end of the motor water pump is connected to the first end of the motor subsystem; the second end of the motor water pump is connected to the second end of the coolant channel, and the second end of the motor subsystem is connected to the first end of the coolant channel.

[0021] In the embodiment of the present application, the thermal management system of the vehicle is provided with a second battery liquid heat circuit. When the temperature of the battery module is low, the second battery liquid heat circuit can be operated to heat the battery module by utilizing the waste heat of the motor subsystem or active heat generation to avoid the battery module temperature being too low and affecting the performance. Compared with the method of heating the battery module by a heating film in the related art, the weight and cost of the vehicle can be reduced. At the same time, the second battery liquid heat circuit only connects the motor subsystem and the coolant flow channel, and does not pass through other possible heat absorbing devices, which can reduce heat loss and improve the heating efficiency of the battery module.

[0022] In a possible implementation, the battery temperature equalization circuit and the second battery liquid heat circuit both further include a second three-way valve;

[0023] A first end of the second three-way valve is connected to a first end of the motor water pump, a second end of the second three-way valve is connected to a first end of the motor subsystem, and a third end of the second three-way valve is connected to a first end of the coolant flow channel;

[0024] When the second battery liquid heat circuit is in operation, the first end of the second three-way valve is in communication with the second end of the second three-way valve;

[0025] When the battery temperature equalizing circuit is working, the first end of the second three-way valve is connected to the third end of the second three-way valve.

[0026] The embodiment of the present application adds a second three-way valve, so that the flow direction of the coolant therein can be controlled by the flow direction of the second three-way valve, so that different circuits can work.

[0027] In a possible implementation, the thermal management system of the vehicle further includes a battery liquid cooling circuit; the motor liquid cooling system further includes a radiator;

[0028] The battery liquid cooling circuit includes a motor water pump, a radiator and a coolant flow channel;

[0029] The first end of the motor water pump is connected to the first end of the radiator and the first end of the coolant flow channel respectively, and the second end of the motor water pump is connected to the second end of the radiator and the second end of the coolant flow channel respectively.

[0030] In an embodiment of the present application, the thermal management system of the vehicle is provided with a battery liquid cooling circuit, which can cool the battery module when the temperature of the battery module is high. Among them, when the battery liquid cooling circuit is used to cool the battery module, the coolant flowing out of the motor water pump directly reaches the radiator for cooling in one way, and directly flows into the coolant flow channel in another way to cool the battery module, without passing through the motor in the middle, thereby reducing cold loss and improving the efficiency of battery liquid cooling. By cooling the battery module through the battery liquid cooling circuit, the temperature difference of the battery module can be reduced, and the performance and life of the battery module can be improved. In addition, when the battery module has thermal runaway, the battery direct cooling circuit cannot work. Therefore, the battery module can be cooled by the battery liquid cooling circuit to avoid the performance degradation or failure of the battery module.

[0031] In a possible implementation, the battery liquid cooling circuit and the battery temperature equalizing circuit both further include a third three-way valve;

[0032] The first end of the third three-way valve is connected to the second end of the radiator, the second end of the third three-way valve is connected to the second end of the motor water pump, and the third end of the third three-way valve is connected to the second end of the coolant flow channel;

[0033] When the battery liquid cooling circuit is working, the first end of the third three-way valve is connected to the second end of the third three-way valve, and the second end of the third three-way valve is connected to the third end of the third three-way valve;

[0034] When the battery temperature equalizing circuit is working, the second end of the third three-way valve is connected to the third end of the third three-way valve.

[0035] The embodiment of the present application adds a third three-way valve, so that the flow direction of the coolant therein can be controlled by the flow direction of the third three-way valve, so that different circuits can work.

[0036] In one possible implementation, the thermal management system of the vehicle further includes a third battery liquid thermal circuit;

[0037] The third battery liquid heat circuit includes an engine water pump, an engine, a fourth three-way valve, an air conditioning water pump, a first PTC heater, a heater core, a first three-way valve, a coolant flow channel, and a motor water pump;

[0038] The first end of the fourth three-way valve is connected to the second end of the air conditioning water pump, the second end of the fourth three-way valve is connected to the third end of the first three-way valve and the first end of the motor water pump respectively, the third end of the fourth three-way valve is connected to the first end of the engine water pump, the second end of the engine water pump is connected to the first end of the engine, and the second end of the engine is connected to the second end of the air conditioning water pump;

[0039] When the third battery liquid heat circuit is working, the first end of the first three-way valve is connected to the second end of the first three-way valve, and the second end of the fourth three-way valve is connected to the third end of the fourth three-way valve;

[0040] When the first battery liquid heat circuit is in operation, the first end of the fourth three-way valve is connected to the second end of the fourth three-way valve;

[0041] When the battery temperature equalization circuit is working, the fourth three-way valve is in a cut-off state.

[0042] In an embodiment of the present application, the thermal management system of the vehicle is provided with a third battery liquid thermal circuit. When the battery temperature is low, the battery module can be heated by the third battery liquid thermal circuit to prevent the battery module temperature from being too low. The third battery liquid thermal circuit utilizes the waste heat of the engine, or the waste heat of the engine is combined with the first PTC heater in the heating circuit of the air conditioner in the vehicle to heat the coolant, and then the battery module is heated by the coolant. There is no need to add additional heating equipment at the battery module, which can save costs and reduce the weight of the vehicle.

[0043] In a possible implementation, the refrigerant system includes an evaporator, a compressor, and a condenser;

[0044] The first end of the refrigerant flow channel and the first end of the evaporator are both connected to the first end of the condenser, the second end of the refrigerant flow channel and the second end of the evaporator are both connected to the first end of the compressor, and the second end of the compressor is connected to the second end of the condenser.

[0045] The embodiment of the present application can quickly cool down the battery module through a battery direct cooling circuit, with high cooling efficiency, and can be applicable to working conditions with high battery temperature.

[0046] In a second aspect, an embodiment of the present application provides a vehicle, comprising a thermal management system of the vehicle as described in the first aspect or any possible implementation of the first aspect.

[0047] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0048] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0050] Figure 1 is a schematic diagram of the structure of a thermal management system for a vehicle provided in one embodiment of the present application;

[0051] Figure 2 It is a schematic diagram of the structure of a thermal management system for a vehicle provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0052] The present application is described more clearly below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the effects of the present application, but are not intended to limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present application. These all fall within the scope of protection of the present application.

[0053] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0054] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0055] In the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and should not be understood as indicating or implying relative importance.

[0056] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0057] In addition, the “plurality” mentioned in the embodiments of the present application should be interpreted as two or more.

[0058] The vehicle's thermal management system can adjust the temperature of the vehicle's battery module so that the battery module can operate efficiently and extend its service life. In the related art, only the refrigerant in the vehicle's air conditioner is used to perform thermal management on the vehicle's battery module. The refrigerant can usually only cool the battery module, and the principle of thermal management by the refrigerant is phase change heat transfer. The refrigerant will undergo a phase change when absorbing heat, from liquid to gas. In this process, the cooling capacity of the refrigerant will change significantly. For example, when the refrigerant cools the battery module, it may be in a liquid state at the beginning, and become a gas after absorbing heat, which may cause the cooling effect of the refrigerant at different positions of the battery module to be inconsistent, which may easily cause a large temperature difference between the battery cells in the battery module, which is easy to affect the performance and life of the battery module. Among them, the battery module refers to the power battery module of the vehicle, which can include multiple battery cells.

[0059] In order to solve the above problems, the embodiment of the present application provides a vehicle thermal management system. By setting a dual-medium cold plate at the battery module of the vehicle, both refrigerant and coolant can flow through the battery module. The battery module can be cooled by a battery direct cooling circuit, or by a battery temperature equalization circuit for rapid cooling and temperature equalization. The battery module can also be thermally managed by both a battery direct cooling circuit and a battery temperature equalization circuit. When the temperature difference between the cells in the battery module is large, the battery temperature equalization circuit can be operated to reduce the temperature difference between the cells and avoid affecting the performance and life of the battery module.

[0060] Reference below Figure 1 The thermal management system of a vehicle provided by the present application is described by referring to the structural schematic diagram of the thermal management system of the vehicle provided by the present application. It should be noted that the thermal management system of the vehicle provided by the present application Figure 1 This is only shown to facilitate understanding of the spirit and principle of the present application, and the embodiments of the present application are not limited in this regard.

[0061] See also Figure 1 , an embodiment of the present application provides a thermal management system for a vehicle, which may include a battery temperature equalization circuit and a battery direct cooling circuit;

[0062] The battery temperature equalization circuit includes a dual-medium cold plate 2 and a motor water pump 3 in the motor liquid cooling system; the dual-medium cold plate 2 is arranged at the battery module 1 of the vehicle, and includes a refrigerant flow channel and a coolant flow channel; the coolant flow channel and the motor water pump 3 are connected to form a circuit;

[0063] The battery direct cooling circuit includes a refrigerant flow channel and a refrigerant system; the refrigerant flow channel is connected to the refrigerant system.

[0064] The dual-medium cold plate 2 includes a refrigerant flow channel and a coolant flow channel, wherein the refrigerant flows through the refrigerant flow channel and the coolant flows through the coolant flow channel. The refrigerant may be a refrigerant, such as R134a or R1234yf, etc. The coolant may be water, a mixture of ethylene glycol or a mixture of propylene glycol, etc.

[0065] In the dual-medium cold plate 2, the refrigerant flow channel and the coolant flow channel can be arranged alternately, and the refrigerant flow channel and the coolant flow channel can both be labyrinth flow channels, multiple U-shaped flow channels connected in sequence, wavy flow channels or S-shaped curved flow channels, etc.

[0066] The dual-medium cold plate 2 may be disposed at the battery module 1 of the vehicle, and the battery module 1 may be thermally managed by the refrigerant and / or coolant flowing therethrough.

[0067] The vehicle's thermal management system is provided with a separate battery temperature equalization circuit. In the battery temperature equalization circuit, the motor water pump 3 and the coolant flow channel are connected in series to form a circuit. The motor water pump 3 and the coolant flow channel can be selectively connected. When the motor water pump 3 and the coolant flow channel are connected, the battery temperature equalization circuit is connected. When the motor water pump 3 starts working, the battery temperature equalization circuit works, which can quickly equalize the temperature and / or quickly cool down the battery module 1.

[0068] When the battery temperature equalization circuit is working, the coolant can circulate in it. The motor water pump 3 can be used to promote the circulation of the coolant in the circuit, and can adjust the flow rate of the coolant. When the battery temperature equalization circuit is working, the motor water pump 3 can adjust the flow rate of the coolant, so that the flow rate of the coolant is accelerated, so that the battery module 1 can be quickly equalized and / or quickly cooled. And when the battery temperature equalization circuit is working, only the motor water pump 3 is working in the entire circuit, and the coolant will only exchange heat with the battery module 1, without other heat exchange. Therefore, the temperature difference between the battery modules 1 can be quickly reduced, the temperature of the battery module 1 is balanced, and when the coolant temperature is lower than the temperature of the battery module 1, the battery module 1 can also be quickly cooled.

[0069] When thermal runaway occurs in the battery module 1 or when the temperature difference between the cells of the battery module 1 is large, the battery temperature equalization circuit can be controlled to operate to cool or equalize the temperature of the battery module 1.

[0070] When the battery temperature equalization circuit is working, the coolant flowing out of the motor water pump 3 passes through the coolant flow channel, equalizes the temperature of the battery module 1 and / or cools it down before returning to the motor water pump 3 .

[0071] In some possible implementations, see Figure 1 The battery temperature equalization circuit may further include a coolant branch 4, wherein the motor water pump 3, the coolant branch 4 and the coolant flow channel are connected in series to form a circuit.

[0072] In the embodiment of the present application, the coolant branch 4 is a pipe through which the coolant flows, and the coolant branch 4 does not flow through any device.

[0073] In the battery direct cooling circuit, the refrigerant flow channel can be selectively connected to the refrigerant system. When the refrigerant flow channel is connected to the refrigerant system, the battery direct cooling circuit circulates, the battery direct cooling circuit works, and the battery module 1 can be cooled.

[0074] When the battery direct cooling circuit is working, the refrigerant can flow through it. When the refrigerant flows through the refrigerant flow channel, it can cool down the battery module 1. When the battery direct cooling circuit is working, in order to avoid too large a temperature difference between the cells in the battery module 1, the battery temperature equalization circuit can be operated, that is, the battery direct cooling circuit and the battery temperature equalization circuit are operated at the same time, which can not only quickly cool down the battery module 1, but also avoid too large a temperature difference between the cells in the battery module 1, which affects the performance and life of the battery module 1.

[0075] The thermal management system of the vehicle provided in the embodiment of the present application is provided with a dual-medium cold plate 2 at the battery module 1 of the vehicle, so that both refrigerant and coolant can flow through the battery module 1. The battery direct cooling circuit can be used to cool the battery module 1, or the battery temperature equalization circuit can be used to quickly cool and equalize the temperature of the battery module 1. The battery direct cooling circuit and the battery temperature equalization circuit can also be used to simultaneously perform thermal management on the battery module 1. When the temperature difference between the battery cells in the battery module 1 is large, the battery temperature equalization circuit can be operated to reduce the temperature difference between the battery cells and avoid affecting the performance and life of the battery module 1. In addition, when thermal runaway occurs in the battery module 1, the battery direct cooling circuit cannot work, and the battery temperature equalization circuit can be used to cool the battery module 1 to avoid performance degradation or failure of the battery module 1.

[0076] In addition to the requirements of cooling and temperature equalization, the battery module may also need to be heated. For example, when the ambient temperature is low, the battery module 1 is charged. If the temperature of the battery module 1 is low, the charging efficiency is low. Therefore, the battery module 1 needs to be heated. However, in the related art, only the refrigerant in the vehicle's air conditioner is used to perform thermal management on the vehicle's battery module 1. The refrigerant can usually only cool the battery module 1, and the heating effect on the battery module 1 is not ideal. Therefore, a heating film needs to be installed. When the battery module 1 needs to be heated, the battery module 1 is heated by the heating film. However, this heating method will undoubtedly increase the weight and cost of the vehicle. In order to solve this problem, the thermal management system of the vehicle provided in the embodiment of the present application may also include a first battery liquid thermal circuit to achieve liquid thermal heating of the battery module 1.

[0077] In some embodiments, see Figure 1 , the thermal management system of the vehicle further includes a first battery liquid thermal circuit;

[0078] The first battery liquid heat circuit includes an air conditioning water pump 18, a first PTC (Positive Temperature Coefficient, positive temperature coefficient / positive temperature coefficient thermistor) heater 19, a heater core 20, a coolant flow channel and a motor water pump 3;

[0079] The first end of the coolant flow channel is connected to the first end of the heater core 20, the second end of the heater core 20 is connected to the first end of the first PTC heater 19, the second end of the first PTC heater 19 is connected to the first end of the air conditioning water pump 18, the second end of the air conditioning water pump 18 is connected to the first end of the motor water pump 3, and the second end of the motor water pump 3 is connected to the second end of the coolant flow channel.

[0080] The first PTC heater 19 may be a WPTC heater, that is, a water-heating type PTC heater.

[0081] In the first battery liquid thermal circuit, the first end of the coolant flow channel and the first end of the heater core 20, the second end of the air conditioning water pump 18 and the first end of the motor water pump 3, and the second end of the motor water pump 3 and the second end of the coolant flow channel can be selectively connected. When the first end of the coolant flow channel and the first end of the heater core 20, the second end of the air conditioning water pump 18 and the first end of the motor water pump 3, and the second end of the motor water pump 3 and the second end of the coolant flow channel are all connected, the first battery liquid thermal circuit is flowing. When the air conditioning water pump 18 and the first PTC heater 19 are working, or when the motor water pump 3 and the first PTC heater 19 are working, the first battery liquid thermal circuit is working.

[0082] When the first battery liquid heat circuit is working, the coolant can flow in it. The air conditioning water pump 18 and / or the motor water pump 3 can be used to promote the circulation of the coolant in the circuit and adjust the flow rate of the coolant. The coolant flowing out of the air conditioning water pump 18 is heated by the first PTC heater 19, flows through the warm air core 20, enters the coolant flow channel, heats the battery module 1, flows through the motor water pump 3 and returns to the air conditioning water pump 18.

[0083] In some possible implementations, when the battery module 1 has a heating demand, the first battery liquid thermal circuit may be controlled to operate to heat the battery module 1 .

[0084] In some possible implementations, see Figure 1 The first battery liquid heat circuit may further include a second overflow tank 28 , the second end of the air conditioning water pump 18 is connected to the first end of the second overflow tank 28 , and the second end of the second overflow tank 28 is connected to the first end of the motor water pump 3 .

[0085] In the embodiment of the present application, the thermal management system of the vehicle is provided with a first battery liquid thermal circuit. When the battery temperature is low, the battery module 1 can be heated by the first battery liquid thermal circuit to prevent the battery module 1 from being too low in temperature. The first battery liquid thermal circuit utilizes the first PTC heater 19 in the heating circuit of the air conditioner in the vehicle to heat the coolant, and then heats the battery module 1 by the coolant. There is no need to add additional heating equipment (heating film) to the battery module 1, which can save costs and reduce the weight of the vehicle.

[0086] In some embodiments, see Figure 1 , the battery temperature equalizing circuit and the first battery liquid heat circuit both further include a first three-way valve 17;

[0087] The first end of the first three-way valve 17 is connected to the first end of the heater core 20, the second end of the first three-way valve 17 is connected to the first end of the coolant flow channel, and the third end of the first three-way valve 17 is connected to the first end of the motor water pump 3;

[0088] When the first battery liquid heat circuit is working, the first end of the first three-way valve 17 is connected to the second end of the first three-way valve 17;

[0089] When the battery temperature equalizing circuit is working, the second end of the first three-way valve 17 is connected to the third end of the first three-way valve 17 .

[0090] The embodiment of the present application adds a first three-way valve 17, so that the flow direction of the coolant therein can be controlled by the flow direction of the first three-way valve 17, so that different circuits can work.

[0091] In addition to the aforementioned first battery liquid thermal circuit, the vehicle's thermal management system also has other battery liquid thermal circuits that can also heat the battery module 1, which are described in detail below.

[0092] In some embodiments, see Figure 1 , the vehicle's thermal management system also includes a second battery liquid thermal loop; the motor liquid cooling system also includes a motor subsystem;

[0093] The second battery liquid heat circuit includes a motor water pump 3, a motor subsystem and a coolant flow channel;

[0094] The first end of the motor water pump 3 is connected to the first end of the motor subsystem; the second end of the motor water pump 3 is connected to the second end of the coolant channel, and the second end of the motor subsystem is connected to the first end of the coolant channel.

[0095] See also Figure 1The motor liquid cooling system may include the motor water pump 3, the motor subsystem and the radiator 5. The motor liquid cooling system may also be referred to as a motor liquid cooling circuit, wherein the motor water pump 3, the motor subsystem and the radiator 5 are connected in series to form a circuit. The motor subsystem may include an OBC three-in-one 6 and a motor 7 connected in series. The OBC three-in-one 6 may include an OBC (On-Board Charger), a PDU (Power Distribution Unit) and a DC-DC (Direct Current-Direct Current) converter. See Figure 1 A first temperature sensor 8 may be provided at the inlet of the motor 7 to collect the inlet temperature of the motor 7. The radiator 5 may be a low-temperature radiator.

[0096] When the second battery liquid heat circuit is working, the coolant flowing out of the motor water pump 3 is heated by the motor subsystem, flows into the coolant flow channel, heats the battery module 1, and then returns to the motor water pump 3.

[0097] In the second battery liquid heat circuit, the motor water pump 3, the motor subsystem and the coolant flow channel are connected in series to form a circuit. The motor water pump 3 and the motor subsystem, as well as the motor water pump 3 and the coolant flow channel can be selectively connected. When the motor water pump 3 and the motor subsystem, as well as the motor water pump 3 and the coolant flow channel are connected, the second battery liquid heat circuit is connected, and the second battery liquid heat circuit works to heat and increase the temperature of the battery module 1.

[0098] When the battery module 1 needs to be heated, for example, when the battery module 1 is in an extremely low temperature environment, it needs to be heated. At this time, the second battery liquid heat circuit can be controlled to work. If the motor 7 in the second battery liquid heat circuit is in working state, the coolant flowing out of the motor water pump 3 can absorb the waste heat (residual heat) generated by the motor 7 when it is working, recover the residual heat, and then pass through the coolant flow channel to heat the battery module 1. If the motor 7 in the second battery liquid heat circuit is not in working state, the motor 7 can be controlled to actively block and generate heat, so that the coolant can absorb the heat, thereby heating the battery module 1.

[0099] When the second battery liquid heat circuit is working, the coolant flowing out of the motor water pump 3 only flows through the motor subsystem to absorb heat, and then enters the coolant flow channel to heat the battery module 1. It will not pass through other heat absorbing equipment in the middle, which can reduce heat loss and improve heating efficiency.

[0100] In some possible implementations, see Figure 1 The second battery liquid thermal circuit may further include the above-mentioned first three-way valve 17; the second end of the motor subsystem is connected to the third end of the first three-way valve 17, and the second end of the first three-way valve 17 is connected to the first end of the coolant flow channel.

[0101] When the second battery liquid thermal circuit is in operation, the second end of the first three-way valve 17 is in communication with the third end of the first three-way valve 17 .

[0102] The priority of the second battery liquid thermal circuit can be higher than that of the first battery liquid thermal circuit, that is, when the battery needs to be heated, if the waste heat of the motor 7 can heat the battery module 1, the second battery liquid thermal circuit is used to heat the battery module 1 first; if the waste heat of the motor 7 is insufficient, the first battery liquid thermal circuit is used to heat the battery module 1.

[0103] In the embodiment of the present application, the thermal management system of the vehicle is provided with a second battery liquid thermal circuit. When the temperature of the battery module 1 is low, the second battery liquid thermal circuit can be operated to heat the battery module 1 by utilizing the waste heat of the motor subsystem or active heat generation, so as to avoid the battery module 1 being too low in temperature and affecting the performance. Compared with the method of heating the battery module 1 by a heating film in the related art, the weight and cost of the vehicle can be reduced. At the same time, the second battery liquid thermal circuit only connects the motor subsystem and the coolant flow channel, and does not pass through other possible heat absorbing devices, which can reduce heat loss and improve the heating efficiency of the battery module 1.

[0104] In some embodiments, the battery temperature equalization circuit and the second battery liquid heat circuit both further include a second three-way valve 14;

[0105] A first end of the second three-way valve 14 is connected to a first end of the motor water pump 3, a second end of the second three-way valve 14 is connected to a first end of the motor subsystem, and a third end of the second three-way valve 14 is connected to a first end of the coolant flow channel;

[0106] When the second battery liquid heat circuit is in operation, the first end of the second three-way valve 14 is connected to the second end of the second three-way valve 14;

[0107] When the battery temperature equalizing circuit is working, the first end of the second three-way valve 14 is connected to the third end of the second three-way valve 14 .

[0108] In some possible implementations, the first battery liquid thermal circuit further includes the second three-way valve 14. When the first battery liquid thermal circuit is in operation, the first end of the second three-way valve 14 is connected to the third end of the second three-way valve 14.

[0109] The embodiment of the present application adds a second three-way valve 14, so that the flow direction of the coolant therein can be controlled by the flow direction of the second three-way valve 14, so that different circuits can work.

[0110] In addition to the aforementioned direct battery cooling circuit, the vehicle's thermal management system also has other circuits that can also cool the battery module 1, which are described in detail below.

[0111] In some embodiments, the thermal management system of the vehicle further includes a battery liquid cooling circuit; the motor liquid cooling system further includes a radiator 5;

[0112] The battery liquid cooling circuit includes a motor water pump 3, a radiator 5 and a coolant flow channel;

[0113] The first end of the motor water pump 3 is connected to the first end of the radiator 5 and the first end of the coolant flow channel respectively, and the second end of the motor water pump 3 is connected to the second end of the radiator 5 and the second end of the coolant flow channel respectively.

[0114] In the battery liquid cooling circuit, the motor water pump 3 can be selectively connected to the radiator 5, and the motor water pump 3 can be selectively connected to the coolant flow channel. When the motor water pump 3 is connected to the radiator 5, and the motor water pump 3 is connected to the coolant flow channel, the battery liquid cooling circuit circulates, the battery liquid cooling circuit works, and the battery module 1 can be cooled.

[0115] When the battery liquid cooling circuit is working, the coolant can circulate in it. The motor water pump 3 can be used to promote the circulation of the coolant in the circuit and can adjust the flow rate of the coolant. The coolant flowing out of the motor water pump 3 is divided into two paths: one path of the coolant is cooled by the radiator 5 and returns to the motor water pump 3, wherein the coolant can exchange heat with the external air when flowing through the radiator 5 to dissipate the heat; the other path of the coolant flows into the coolant flow channel, cools the battery module 1, and then returns to the motor water pump 3, wherein the coolant can exchange heat with the battery module 1 in the coolant flow channel, absorb the heat of the battery module 1, and reduce the temperature of the battery module 1. The temperature of the coolant passing through the coolant flow channel will increase, but after merging with the coolant passing through the radiator 5, the temperature will decrease.

[0116] The battery liquid cooling circuit provided in the embodiment of the present application is connected to the above-mentioned radiator 5 and does not pass through the above-mentioned motor subsystem. Therefore, it will not exchange heat with the motor subsystem, which can reduce cold loss.

[0117] In some possible implementations, see Figure 1 The motor liquid cooling system further includes a first overflow tank 9 connected between the radiator 5 and the motor water pump 3. Correspondingly, the battery liquid cooling circuit further includes the first overflow tank 9, and the second end of the radiator 5 is connected to the second end of the motor water pump 3 through the first overflow tank 9.

[0118] When thermal runaway occurs in the battery module 1, the battery direct cooling circuit is prohibited from working. At this time, the battery module 1 can be cooled by the battery liquid cooling circuit.

[0119] In the embodiment of the present application, the thermal management system of the vehicle is provided with a battery liquid cooling circuit, which can cool the battery module 1 when the temperature of the battery module 1 is high. Among them, when the battery liquid cooling circuit is used to cool the battery module 1, the coolant flowing out of the motor water pump 3 directly reaches the radiator 5 for cooling in one way, and directly flows into the coolant flow channel in another way to cool the battery module 1, without passing through the motor 7 in the middle, thereby reducing the cold loss and improving the battery liquid cooling efficiency. By cooling the battery module 1 through the battery liquid cooling circuit, the temperature difference of the battery module 1 can be reduced, and the performance and life of the battery module 1 can be improved. In addition, when the battery module 1 has thermal runaway, the battery direct cooling circuit cannot work. Therefore, the battery module 1 can be cooled through the battery liquid cooling circuit to avoid the performance degradation or failure of the battery module 1.

[0120] In some embodiments, see Figure 1 , the battery liquid cooling circuit and the battery temperature equalizing circuit both further include a third three-way valve 13;

[0121] The first end of the third three-way valve 13 is connected to the second end of the radiator 5, the second end of the third three-way valve 13 is connected to the second end of the motor water pump 3, and the third end of the third three-way valve 13 is connected to the second end of the coolant flow channel;

[0122] When the battery liquid cooling circuit is working, the first end of the third three-way valve 13 is connected to the second end of the third three-way valve 13, and the second end of the third three-way valve 13 is connected to the third end of the third three-way valve 13;

[0123] When the battery temperature equalizing circuit is working, the second end of the third three-way valve 13 is connected to the third end of the third three-way valve 13 .

[0124] See also Figure 1 The first battery liquid thermal circuit and the second battery liquid thermal circuit both further include the third three-way valve 13 mentioned above.

[0125] When the first battery liquid thermal circuit is in operation, the second end of the third three-way valve 13 is connected to the third end of the third three-way valve 13 .

[0126] When the second battery liquid heat circuit is working, the second end of the third three-way valve 13 is connected to the third end of the third three-way valve 13 .

[0127] The battery liquid cooling circuit may further include a second three-way valve 14 ; when the battery liquid cooling circuit is in operation, the first end of the second three-way valve 14 is connected to the third end of the second three-way valve 14 .

[0128] The embodiment of the present application adds a third three-way valve 13, so that the flow direction of the coolant therein can be controlled by the flow direction of the third three-way valve 13, so that different circuits can work.

[0129] In addition to the aforementioned first battery liquid thermal circuit and second battery liquid thermal circuit, the vehicle's thermal management system also has other battery liquid thermal circuits that can also heat the battery module 1, which are described in detail below.

[0130] In some embodiments, see Figure 1 , the vehicle's thermal management system also includes a third battery liquid thermal loop;

[0131] The third battery liquid heat circuit includes an engine water pump 22, an engine 21, a fourth three-way valve 27, an air conditioning water pump 18, a first PTC heater 19, a heater core 20, a first three-way valve 17, a coolant flow channel and a motor water pump 3;

[0132] A first end of the fourth three-way valve 27 is connected to a second end of the air conditioning water pump 18, a second end of the fourth three-way valve 27 is connected to a third end of the first three-way valve 17 and a first end of the motor water pump 3 respectively, a third end of the fourth three-way valve 27 is connected to a first end of the engine water pump 22, a second end of the engine water pump 22 is connected to a first end of the engine 21, and a second end of the engine 21 is connected to a second end of the air conditioning water pump 18;

[0133] When the third battery liquid heat circuit is working, the first end of the first three-way valve 17 is connected to the second end of the first three-way valve 17, and the second end of the fourth three-way valve 27 is connected to the third end of the fourth three-way valve 27;

[0134] When the first battery liquid heat circuit is working, the first end of the fourth three-way valve 27 is connected to the second end of the fourth three-way valve 27;

[0135] When the battery temperature equalization circuit is working, the fourth three-way valve 27 is in a cut-off state.

[0136] When the battery liquid cooling circuit is working, the fourth three-way valve 27 is in a cut-off state.

[0137] See also Figure 1 The third battery liquid thermal circuit also includes a second three-way valve 14 and a third three-way valve 13; when the third battery liquid thermal circuit is working, the second end of the third three-way valve 13 is connected to the third end of the third three-way valve 13, and the first end of the second three-way valve 14 is connected to the third end of the second three-way valve 14.

[0138] When the third battery liquid thermal circuit is working, the coolant can circulate in it. The engine water pump 22 can be used to promote the circulation of the coolant in the circuit and can adjust the flow rate of the coolant. The coolant flowing out of the engine water pump 22 is heated by the engine 21, flows through the air conditioning water pump 18, the first PTC heater 19 and the heater core 20, enters the coolant flow channel, heats the battery module 1, and then flows through the motor water pump 3 and returns to the engine water pump 22. The third battery liquid thermal circuit can absorb the waste heat of the engine 21 to heat the battery module 1.

[0139] When the battery module 1 has a heating demand, the third battery liquid heat circuit can be controlled to operate, and the battery module 1 can be heated by the waste heat of the engine 21 , or the battery module 1 can be heated by the waste heat of the engine 21 and the first PTC heater 19 .

[0140] When the third battery liquid heat circuit is working, the first PTC heater 19 may or may not work.

[0141] The third battery liquid thermal loop may have a lower priority than the first battery liquid thermal loop and the second battery liquid thermal loop.

[0142] In an embodiment of the present application, the thermal management system of the vehicle is provided with a third battery liquid heat circuit. When the battery temperature is low, the battery module 1 can be heated by the third battery liquid heat circuit to prevent the battery module 1 from being too low in temperature; and the third battery liquid heat circuit utilizes the waste heat of the engine 21, or the waste heat of the engine 21 is combined with the first PTC heater 19 in the heating circuit of the air conditioner in the vehicle to heat the coolant, and then the battery module 1 is heated by the coolant, and there is no need to add additional heating equipment at the battery module 1, which can save costs and reduce the weight of the vehicle.

[0143] In some possible implementations, see Figure 2 , a second PTC heater 29 may be provided on the coolant branch 4;

[0144] The thermal management system of the vehicle may further include a fourth battery liquid thermal circuit; the fourth battery liquid thermal circuit includes the motor water pump 3, the second PTC heater 29 on the coolant branch 4, and the coolant flow channel.

[0145] When the fourth battery liquid heat circuit is working, the coolant flowing out of the motor water pump 3 is heated by the second PTC heater 29 of the coolant branch 4, flows into the coolant flow channel, heats the battery module 1, and then returns to the motor water pump 3.

[0146] exist Figure 2 In the illustrated architecture, the fourth battery liquid heat circuit and the battery temperature equalization circuit are the same circuit, but when the battery temperature equalization circuit is working, the second PTC heater 29 does not work, and when the fourth battery liquid heat circuit is working, the second PTC heater 29 works. Similarly, when the battery liquid cooling circuit is working, the second PTC heater 29 also does not work.

[0147] When the battery module 1 needs to be heated, for example, when the battery module 1 is in an extremely low temperature environment, it needs to be heated. At this time, if the motor 7 in the second battery liquid heat circuit is not working, in order to avoid affecting the energy efficiency and the life of the motor 7, the fourth battery liquid heat circuit can be controlled to work. The efficiency of heating the battery module 1 through the fourth battery liquid heat circuit is higher than that of heating the battery module 1 through the first battery liquid heat circuit by using the motor 7 to block the rotor.

[0148] When the fourth battery liquid heat circuit is working, the coolant flowing out of the motor water pump 3 only flows through the second PTC heater 29 for heating, and then enters the coolant flow channel to heat the battery module 1. It will not pass through other heat absorbing equipment in the middle, which can reduce heat loss and improve heating efficiency.

[0149] In some possible implementations, see Figure 2 The fourth battery liquid thermal circuit may further include the first three-way valve 17 , the second three-way valve 14 and the third three-way valve 13 mentioned above.

[0150] When the fourth battery liquid thermal circuit is working, the second end of the first three-way valve 17 is connected to the third end of the first three-way valve 17, the first end of the second three-way valve 14 is connected to the third end of the second three-way valve 14, and the second end of the third three-way valve 13 is connected to the third end of the third three-way valve 13.

[0151] In an embodiment of the present application, the thermal management system of the vehicle is provided with a fourth battery liquid thermal circuit. When the battery temperature is low, the battery module 1 can be heated by the fourth battery liquid thermal circuit to prevent the battery module 1 from being too low in temperature. In addition, when the motor 7 in the second battery liquid thermal circuit is not working and the battery module 1 needs to be heated, the fourth battery liquid thermal circuit can be controlled to operate, which can avoid affecting the life and energy efficiency of the motor 7, and the heating efficiency of the battery module 1 is higher.

[0152] In the above-mentioned embodiments, the coolant flow path in the thermal management system of the vehicle is mainly introduced. The following is a specific introduction to the refrigerant flow path in the thermal management system of the vehicle.

[0153] In some embodiments, see Figure 1 , the refrigerant system includes an evaporator 12, a compressor 11 and a condenser 10;

[0154] The first end of the refrigerant flow channel and the first end of the evaporator 12 are both connected to the first end of the condenser 10, the second end of the refrigerant flow channel and the second end of the evaporator 12 are both connected to the first end of the compressor 11, and the second end of the compressor 11 is connected to the second end of the condenser 10.

[0155] When the battery direct cooling circuit is working, the refrigerant flowing out of the compressor 11 flows through the condenser 10 , enters the refrigerant flow channel, cools the battery module 1 , and then returns to the compressor 11 .

[0156] In an embodiment of the present application, the battery direct cooling circuit may include a compressor 11, a condenser 10, and a refrigerant flow channel. The compressor 11, the condenser 10, and the refrigerant flow channel are connected in series to form a circuit. The condenser 10 and the refrigerant flow channel can be selectively connected. When the condenser 10 and the refrigerant flow channel are connected, the battery direct cooling circuit is connected, and the battery direct cooling circuit works to cool the battery module 1.

[0157] In some possible implementations, see Figure 1 The refrigerant system may further include a first valve 15 and a second valve 16. The first end of the refrigerant flow channel is connected to the first end of the condenser 10 through the first valve 15, and the first end of the evaporator 12 is connected to the first end of the condenser 10 through the second valve 16. The first valve 15 may be an electronic expansion valve; the second valve 16 may include a thermal expansion valve and a stop valve.

[0158] When thermal runaway occurs in the battery module 1, the high-voltage electric compressor 11 is not allowed to work, because if the high-voltage electric compressor 11 continues to work, the thermal runaway of the battery module 1 may become more serious, which may increase the risk of electrical failure. Therefore, when thermal runaway occurs in the battery module 1, the high-voltage electric compressor 11 is not allowed to work, that is, the battery direct cooling circuit is not allowed to work, and the low-voltage motor water pump 3 can work, so the battery module 1 can be cooled by the coolant.

[0159] The embodiment of the present application can quickly cool down the battery module 1 through a battery direct cooling circuit, with high cooling efficiency, and can be applicable to working conditions with high battery temperature.

[0160] It should be noted that the connection relationship between the various components in the thermal management system of the vehicle refers to the connection relationship between the pipes or space containers set at each component through which the coolant or refrigerant can flow. For example, the connection between the motor 7 and the OBC three-in-one 6 means that the pipe set at the motor 7 is connected to the pipe set at the OBC three-in-one 6, and so on.

[0161] In the above-mentioned embodiment, the circuits related to the thermal management of the battery module 1 are mainly introduced. In addition, the thermal management system of the vehicle may also include a circuit for heating the passenger compartment, which is described in detail as follows.

[0162] See also Figure 1 , the thermal management system of the vehicle may also include a first passenger compartment heating circuit;

[0163] The first passenger compartment heating circuit includes an air conditioning water pump 18, a first PTC heater 19, a heater core 20, a first three-way valve 17, a fourth three-way valve 27 and a second overflow tank 28;

[0164] When the first passenger compartment heating circuit is working, the coolant flowing out of the air-conditioning water pump 18 is heated by the first PTC heater 19, flows into the heater core 20, heats the passenger compartment, and then passes through the first three-way valve 17, the fourth three-way valve 27 and the second overflow tank 28 and returns to the air-conditioning water pump 18.

[0165] When the first passenger compartment heating circuit is working, the first end of the fourth three-way valve 27 is connected to the second end of the fourth three-way valve 27 , and the first end of the first three-way valve 17 is connected to the third end of the first three-way valve 17 .

[0166] The vehicle's thermal management system may also include a second passenger compartment heating circuit;

[0167] The second passenger compartment heating circuit includes an engine water pump 22, an engine 21, a second overflow tank 28, an air conditioning water pump 18, a first PTC heater 19, a heater core 20, a first three-way valve 17 and a fourth three-way valve 27;

[0168] When the second passenger compartment heating circuit is working, the coolant flowing out of the engine water pump 22 is heated by the engine 21, flows through the second overflow tank 28, the air-conditioning water pump 18 and the first PTC heater 19 in sequence, enters the heater core 20, heats the passenger compartment, and then returns to the engine water pump 22 through the first three-way valve 17 and the fourth three-way valve 27.

[0169] When the second passenger compartment heating circuit is working, the second end of the fourth three-way valve 27 is connected to the third end of the fourth three-way valve 27 , and the first end of the first three-way valve 17 is connected to the third end of the first three-way valve 17 .

[0170] When the second passenger compartment heating circuit is working, the first PTC heater 19 may or may not work. When the first PTC heater 19 is working, the coolant absorbs the residual heat of the engine 21 and the heat generated by the first PTC heater 19 to heat the passenger compartment; when the first PTC heater 19 is not working, the coolant only absorbs the residual heat of the engine 21 to heat the passenger compartment.

[0171] In some possible implementations, see Figure 1 The thermal management system of the vehicle may further include a thermostat 25, a third overflow tank 26, a high temperature radiator 23 and a fan 24. The connection relationship can be seen in Figure 1 , no more details.

[0172] When there is a need for heating in the passenger compartment, the embodiment of the present application can control the first passenger compartment heating circuit or the second passenger compartment heating circuit to operate to meet the heating demand of the passenger compartment.

[0173] Corresponding to the thermal management system of the above-mentioned vehicle, an embodiment of the present application further provides a vehicle, including the thermal management system of any one of the above-mentioned vehicles, having the beneficial effects of the thermal management system of any one of the above-mentioned vehicles.

[0174] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0175] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A thermal management system for a vehicle, characterized in that: Including battery temperature equalization circuit and battery direct cooling circuit; The battery temperature equalization circuit includes a dual-medium cold plate and a motor water pump in a motor liquid cooling system; the dual-medium cold plate is arranged at the battery module of the vehicle, and includes a refrigerant flow channel and a coolant flow channel; the coolant flow channel and the motor water pump are connected to form a circuit; in the dual-medium cold plate, the refrigerant flow channel and the coolant flow channel are staggered; The battery direct cooling circuit includes the refrigerant flow channel and the refrigerant system; the refrigerant flow channel is connected to the refrigerant system; The thermal management system of the vehicle also includes a first battery fluid thermal circuit; The first battery liquid heat circuit includes an air conditioning water pump, a first PTC heater, a heater core, the coolant flow channel and the motor water pump; The first end of the coolant flow channel is connected to the first end of the heater core, the second end of the heater core is connected to the first end of the first PTC heater, the second end of the first PTC heater is connected to the first end of the air conditioning water pump, the second end of the air conditioning water pump is connected to the first end of the motor water pump, and the second end of the motor water pump is connected to the second end of the coolant flow channel.

2. The thermal management system of a vehicle according to claim 1, characterized in that: The battery temperature equalizing circuit and the first battery liquid heat circuit both further include a first three-way valve; The first end of the first three-way valve is connected to the first end of the heater core, the second end of the first three-way valve is connected to the first end of the coolant flow channel, and the third end of the first three-way valve is connected to the first end of the motor water pump; When the first battery liquid heat circuit is in operation, the first end of the first three-way valve is connected to the second end of the first three-way valve; When the battery temperature equalizing circuit is working, the second end of the first three-way valve is connected to the third end of the first three-way valve.

3. The thermal management system for a vehicle according to claim 1, characterized in that: The thermal management system of the vehicle further includes a second battery liquid thermal circuit; the motor liquid cooling system further includes a motor subsystem; The second battery liquid thermal circuit includes the motor water pump, the motor subsystem and the coolant flow channel; The first end of the motor water pump is connected to the first end of the motor subsystem; the second end of the motor water pump is connected to the second end of the coolant channel, and the second end of the motor subsystem is connected to the first end of the coolant channel.

4. The thermal management system for a vehicle according to claim 3, characterized in that: The battery temperature equalizing circuit and the second battery liquid heat circuit both further include a second three-way valve; The first end of the second three-way valve is connected to the first end of the motor water pump, the second end of the second three-way valve is connected to the first end of the motor subsystem, and the third end of the second three-way valve is connected to the first end of the coolant flow channel; When the second battery liquid heat circuit is in operation, the first end of the second three-way valve is connected to the second end of the second three-way valve; When the battery temperature equalizing circuit is working, the first end of the second three-way valve is connected to the third end of the second three-way valve.

5. The thermal management system for a vehicle according to claim 1, characterized in that: The vehicle's thermal management system also includes a battery liquid cooling circuit; the motor liquid cooling system also includes a radiator; The battery liquid cooling circuit includes the motor water pump, the radiator and the coolant flow channel; The first end of the motor water pump is connected to the first end of the radiator and the first end of the coolant flow channel respectively, and the second end of the motor water pump is connected to the second end of the radiator and the second end of the coolant flow channel respectively.

6. The thermal management system for a vehicle according to claim 5, characterized in that: The battery liquid cooling circuit and the battery temperature equalizing circuit both further include a third three-way valve; The first end of the third three-way valve is connected to the second end of the radiator, the second end of the third three-way valve is connected to the second end of the motor water pump, and the third end of the third three-way valve is connected to the second end of the coolant flow channel; When the battery liquid cooling circuit is working, the first end of the third three-way valve is connected to the second end of the third three-way valve, and the second end of the third three-way valve is connected to the third end of the third three-way valve; When the battery temperature equalizing circuit is working, the second end of the third three-way valve is connected to the third end of the third three-way valve.

7. The thermal management system for a vehicle according to claim 2, characterized in that: The vehicle's thermal management system also includes a third battery fluid thermal loop; The third battery liquid heat circuit includes an engine water pump, an engine, a fourth three-way valve, the air conditioning water pump, the first PTC heater, the heater core, the first three-way valve, the coolant flow channel and the motor water pump; The first end of the fourth three-way valve is connected to the second end of the air conditioning water pump, the second end of the fourth three-way valve is connected to the third end of the first three-way valve and the first end of the motor water pump respectively, the third end of the fourth three-way valve is connected to the first end of the engine water pump, the second end of the engine water pump is connected to the first end of the engine, and the second end of the engine is connected to the second end of the air conditioning water pump; When the third battery liquid heat circuit is working, the first end of the first three-way valve is connected to the second end of the first three-way valve, and the second end of the fourth three-way valve is connected to the third end of the fourth three-way valve; When the first battery liquid heat circuit is working, the first end of the fourth three-way valve is connected to the second end of the fourth three-way valve; When the battery temperature equalizing circuit is working, the fourth three-way valve is in a cut-off state.

8. The thermal management system for a vehicle according to any one of claims 1 to 7, characterized in that: The refrigerant system includes an evaporator, a compressor and a condenser; The first end of the refrigerant flow channel and the first end of the evaporator are both connected to the first end of the condenser, the second end of the refrigerant flow channel and the second end of the evaporator are both connected to the first end of the compressor, and the second end of the compressor is connected to the second end of the condenser.

9. A vehicle, characterized in that: A thermal management system for a vehicle comprising any one of claims 1 to 8.

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