Thermal management system and method, and vehicle

Abstract

A thermal management system, comprising: a driving electric motor thermal management circuit, a traction battery thermal management circuit, and a first multi-way valve (10), wherein the driving electric motor thermal management circuit comprises at least a driving electric motor (20); the traction battery thermal management circuit comprises at least a traction battery (30); and the first multi-way valve (10) is arranged between the driving electric motor thermal management circuit and the traction battery thermal management circuit. The driving electric motor thermal management circuit and the traction battery thermal management circuit are integrated, such that, when the traction battery (30) requires heating, heat from the driving electric motor thermal management circuit can be used to assist in heating the traction battery (30), enabling the power requirements for the selection of an electric heating module to be appropriately reduced, thereby reducing the cost of a vehicle; moreover, energy consumption during electric heating can be reduced, while also recovering thermal energy from the driving electric motor thermal management circuit, thereby improving the energy utilization efficiency of the vehicle. Further provided are an operating method for the thermal management system and a vehicle provided with the thermal management system.

Description

Thermal management system, method and vehicle Technical Field

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

[0002] With increasing environmental awareness, the market share of new energy vehicles continues to expand. New energy vehicles, primarily pure electric vehicles, rely primarily on power batteries for energy. The optimal operating temperature of power batteries is around 25°C. When the power battery temperature is too low or too high, it cannot perform at its best. Therefore, new energy vehicles often have both battery cooling and heating functions.

[0003] Currently, the existing thermal management architecture for new energy vehicles uses independent fluid circulation to dissipate heat for the drive system and power battery system, respectively, while using an electric heating module as a single heat source to heat the power battery. Because this single heat source is often an electric heating module, and to meet heating requirements, electric heating modules often require high power, resulting in high module costs and high energy consumption. Furthermore, significant amounts of thermal energy are unused throughout the vehicle, and when heating is required, the activation of the heating module increases energy consumption, resulting in low overall vehicle energy efficiency.

[0004] Therefore, a thermal management system is urgently needed.

[0005] Summary of the Invention

[0006] In view of the above problems, embodiments of the present application provide a vehicle, method, electronic device, and medium with a fire prevention system to overcome the above problems or at least partially solve the above problems.

[0007] In a first aspect of an embodiment of the present application, a thermal management system is provided, the system comprising at least: a drive motor thermal management circuit, a power battery thermal management circuit, and a first multi-way valve;

[0008] Wherein, the drive motor thermal management circuit at least includes: a drive motor;

[0009] The power battery thermal management circuit includes at least: a power battery;

[0010] The first multi-way valve is arranged between the drive motor thermal management circuit and the power battery thermal management circuit;

[0011] When the power battery needs to be heated, the drive motor thermal management circuit is connected to the power battery thermal management circuit through the first multi-way valve;

[0012] When the power battery needs to dissipate heat, the drive motor thermal management circuit and the power battery thermal management circuit are disconnected by the first multi-way valve.

[0013] Optionally, the drive motor thermal management circuit further includes: a radiator; the system further includes: a second multi-way valve;

[0014] The second multi-way valve is arranged between the driving motor and the radiator; the radiator is connected between the water tank and the second multi-way valve;

[0015] When the drive motor needs to dissipate heat, the drive motor is connected to the radiator through the second multi-way valve.

[0016] Optionally, the system further comprises: a refrigerant circulation circuit;

[0017] At least a heat exchanger is provided on the refrigerant circulation circuit;

[0018] The refrigerant circulation circuit and the power battery thermal management circuit perform heat exchange through the heat exchanger to cool the power battery.

[0019] Optionally, the refrigerant circulation circuit includes a primary refrigerant circulation circuit and a secondary refrigerant circulation circuit;

[0020] The primary refrigerant circulation circuit is used to perform primary cooling when the temperature of the power battery is greater than or equal to a first preset temperature and less than a second preset temperature;

[0021] The secondary refrigerant circulation circuit is used to perform secondary cooling when the temperature of the power battery is greater than or equal to the second preset temperature, and the second preset temperature is greater than the first preset temperature.

[0022] Optionally, the primary refrigerant circulation circuit is provided with: a primary refrigeration component and a first switch valve; the secondary refrigerant circulation circuit is provided with: a secondary refrigeration component, an air compressor, and a second switch valve;

[0023] The air compressor is arranged between the first-level refrigeration component, the second-level refrigeration component and the heat exchanger. The inlet of the air compressor is connected to the outlet of the cold end of the heat exchanger, the outlet of the air compressor is connected to the inlet of the second-level refrigeration component, the outlet of the second-level refrigeration component is connected to the inlet of the second switch valve, the inlet of the first-level refrigeration component is connected to the outlet of the cold end of the heat exchanger, the outlet of the first-level refrigeration component is connected to the inlet of the first switch valve, the outlet of the first switch valve is connected to the inlet of the second switch valve, and the outlet of the second switch valve is connected to the inlet of the cold end of the heat exchanger.

[0024] Optionally, the first multi-way valve is provided with: a first liquid inlet, a second liquid inlet, a first liquid outlet and a second liquid outlet;

[0025] The drive motor thermal management circuit and the power battery thermal management circuit share the first multi-way valve;

[0026] When the temperature of the power battery is lower than a first preset temperature, the first liquid inlet is connected to the first liquid discharge port, and the second liquid inlet is connected to the second liquid discharge port, so that the drive motor thermal management circuit is connected to the power battery thermal management circuit;

[0027] When the temperature of the power battery is greater than or equal to the first preset temperature, the first liquid inlet is connected to the second liquid drain, and the second liquid inlet is connected to the first liquid drain, so that the drive motor thermal management circuit is disconnected from the power battery thermal management circuit.

[0028] Optionally, the drive motor thermal management circuit is further provided with a motor water pump; the power battery thermal management circuit is further provided with a battery water pump;

[0029] The second multi-way valve is provided with a third liquid inlet, a third liquid outlet and a fourth liquid outlet;

[0030] The inlet of the motor water pump is respectively connected to the outlet of the water tank, the third drain port and the outlet of the radiator, the outlet of the motor water pump is connected to the inlet of the drive motor, the outlet of the drive motor is connected to the first liquid inlet, the inlet of the radiator is connected to the fourth drain port, the inlet of the battery water pump is connected to the first drain port, the outlet of the battery water pump is connected to the inlet of the power battery, the outlet of the power battery is connected to the inlet of the hot end of the heat exchanger, the outlet of the hot end of the heat exchanger is connected to the second liquid inlet, and the second drain port is connected to the third liquid inlet.

[0031] Optionally, when the temperature of the power battery is lower than the first preset temperature, the third liquid inlet is connected to the third liquid outlet;

[0032] When the temperature of the power battery is greater than or equal to the first preset temperature, the third liquid inlet is communicated with the fourth liquid outlet.

[0033] Optionally, the drive motor thermal management circuit, the power battery thermal management circuit, and the refrigerant circulation circuit are each provided with at least one temperature sensor;

[0034] Among them, the temperature sensor arranged in the drive motor thermal management circuit is used to measure the temperature of the drive motor, the temperature sensor arranged in the power battery thermal management circuit is used to measure the temperature of the power battery, and the temperature sensor arranged in the refrigerant circulation circuit is used to measure the temperature of the refrigerant after being cooled by the refrigerant circulation circuit.

[0035] In a second aspect of the embodiments of the present application, a thermal management method is provided, which is applied to the thermal management system described in the first aspect of the present application, and the method includes:

[0036] Respectively obtaining the temperature of the power battery in the power battery thermal management circuit and the temperature of the drive motor in the drive motor thermal management circuit;

[0037] When the temperature of the power battery is lower than a first preset temperature, the power battery thermal management circuit and the drive motor thermal management circuit are connected via a first multi-way valve, so that the drive motor thermal management circuit heats the power battery; or

[0038] When the temperature of the power battery is greater than or equal to the first preset temperature, the power battery thermal management circuit and the drive motor thermal management circuit are disconnected through the first multi-way valve, so that the drive motor thermal management circuit stops heating the power battery.

[0039] Optionally, the method further includes:

[0040] When the temperature of the power battery is greater than or equal to the first preset temperature, and / or the temperature of the drive motor is greater than or equal to a third preset temperature, the drive motor is connected to the radiator through a second multi-way valve so that the radiator dissipates heat for the drive motor.

[0041] Optionally, the method further includes:

[0042] When the temperature of the power battery is greater than or equal to the first preset temperature and less than a second preset temperature, controlling the power battery thermal management circuit to perform heat exchange with the primary refrigerant circulation circuit to perform primary cooling of the power battery; or

[0043] When the temperature of the power battery is greater than or equal to the second preset temperature, heat exchange is controlled between the power battery thermal management circuit and the secondary refrigerant circulation circuit to perform secondary cooling of the power battery, and the second preset temperature is greater than the first preset temperature.

[0044] In a third aspect of an embodiment of the present application, a vehicle is provided, which includes the thermal management system as described in the first aspect of the present application, and / or executes the thermal management method as described in the second aspect of the present application.

[0045] This application has the following advantages:

[0046] An embodiment of the present application provides a thermal management system, the system comprising at least: a drive motor thermal management circuit, a power battery thermal management circuit, and a first multi-way valve; wherein the drive motor thermal management circuit comprises at least: a drive motor; the power battery thermal management circuit comprises at least: a power battery; the first multi-way valve is disposed between the drive motor thermal management circuit and the power battery thermal management circuit; when the power battery requires heating, the drive motor thermal management circuit and the power battery thermal management circuit are connected via the first multi-way valve; when the power battery requires heat dissipation, the drive motor thermal management circuit and the power battery thermal management circuit are disconnected via the first multi-way valve. By integrating the drive motor thermal management circuit with the power battery thermal management circuit, the present application can utilize the heat of the drive motor thermal management circuit to assist in heating the power battery when heating is required, appropriately reducing the power requirement for the electric heating module selection and reducing the cost of the entire vehicle. Furthermore, it can reduce energy consumption during electric heating while recovering heat energy in the drive motor thermal management circuit, thereby improving the energy efficiency of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. 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 creative work.

[0048] FIG1 is a schematic diagram of the system structure of a thermal management system provided in an embodiment of the present application;

[0049] FIG2 is a schematic diagram of a process flow of a thermal management method provided in an embodiment of the present application;

[0050] FIG3 is a flow chart of a thermal management method provided in an embodiment of the present application.

[0051] Explanation of the accompanying drawings: 10. first multi-way valve; 20. drive motor; 21. motor water pump; 30. power battery; 31. battery water pump; 40. radiator; 50. second multi-way valve; 60. water tank; 70. heat exchanger; 80. primary refrigeration assembly; 81. first switch valve; 90. secondary refrigeration assembly; 91. air compressor; 92. second switch valve; 101. first liquid inlet; 102. second liquid inlet; 103. first liquid discharge port; 104. second liquid discharge port; 105. third liquid inlet; 106. third liquid discharge port; 107. fourth liquid discharge port; 100. first temperature sensor; 110. second temperature sensor; 120. third temperature sensor; 130. fourth temperature sensor; 140. fifth temperature sensor; 150. sixth temperature sensor. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present application will be described in more detail below in conjunction with the accompanying drawings in the embodiments of the present application. Although the accompanying drawings show exemplary embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0053] In a first aspect of an embodiment of the present application, a thermal management system is provided, the system comprising at least: a drive motor thermal management circuit, a power battery thermal management circuit, and a first multi-way valve 10;

[0054] Wherein, the drive motor thermal management circuit at least includes: a drive motor 20;

[0055] The power battery thermal management circuit includes at least: a power battery 30;

[0056] The first multi-way valve 10 is provided between the drive motor thermal management circuit and the power battery thermal management circuit;

[0057] When the power battery 30 needs to be heated, the drive motor thermal management circuit is connected to the power battery thermal management circuit through the first multi-way valve 10;

[0058] When the power battery 30 needs to dissipate heat, the drive motor thermal management circuit and the power battery thermal management circuit are disconnected through the first multi-way valve 10 .

[0059] The present application provides a structural schematic diagram of a thermal management system as shown in Figure 1. As shown in Figure 1, the circuit connected by straight lines in the figure flows through a coolant. When the coolant flows in the straight line circuit in the figure, a drive motor thermal management circuit described in the present application is formed; similarly, the coolant flows in the single-point dashed line in Figure 1. When the coolant flows in the single-point dashed line, a power battery thermal management circuit in the present application is formed; the refrigerant flows in the double-point dashed line in Figure 1. When the refrigerant flows in the double-point dashed line in the figure, a refrigerant circulation circuit in the present application is formed.

[0060] Specifically, in this embodiment, as shown in FIG1 , a thermal management system is provided, wherein the thermal management system includes at least a drive motor thermal management circuit, a power battery thermal management circuit, and a first multi-way valve 10 capable of integrating the drive motor thermal management circuit and the power battery thermal management circuit. Specifically, the drive motor thermal management circuit includes at least a drive motor 20, and the power battery thermal management circuit includes at least a power battery 30. In this embodiment, when the temperature of the power battery 30 is too low, the drive motor thermal management circuit and the power battery thermal management circuit can be connected through the first multi-way valve 10, thereby utilizing the heat generated by the drive motor 20 in the drive motor thermal management circuit when it is driven to heat the power battery 30. In actual applications, the medium flowing in both the drive motor thermal management circuit and the power battery thermal management circuit is a coolant. Therefore, the principle of heating the power battery 30 through the drive motor thermal management circuit is to use the heat generated by the drive motor 20 during operation to heat the coolant in the drive motor thermal management circuit. When the power battery 30 needs to be heated, the first multi-way valve 10 connects the drive motor thermal management circuit with the power battery thermal management circuit. Therefore, the heated coolant in the drive motor thermal management circuit flows through the power battery thermal management circuit, exchanging heat with the coolant in the power battery thermal management circuit, thereby heating the power battery 30. If the temperature of the power battery 30 is too high, the first multi-way valve 10 can disconnect the drive motor thermal management circuit from the power battery thermal management circuit, preventing the coolant in the drive motor thermal management circuit from exchanging heat with the coolant in the power battery thermal management circuit, thereby preventing the drive motor thermal management circuit from heating the power battery 30.

[0061] This application integrates the drive motor thermal management circuit with the power battery thermal management circuit. When the power battery needs to be heated, the heat of the drive motor thermal management circuit can be used to assist in heating the power battery. The power requirement for the selection of the electric heating module can be appropriately reduced, the cost of the entire vehicle can be reduced, and the energy consumption during electric heating can be reduced. At the same time, the heat energy in the drive motor thermal management circuit can be recovered to improve the energy utilization efficiency of the entire vehicle. In addition, the drive motor thermal management circuit and the power battery thermal management circuit can be disconnected in time when the power battery needs to dissipate heat to avoid the drive motor thermal management circuit heating the power battery.

[0062] In a preferred embodiment, the first multi-way valve 10 is provided with: a first liquid inlet 101, a second liquid inlet 102, a first liquid discharge port 103 and a second liquid discharge port 104;

[0063] The drive motor thermal management circuit and the power battery thermal management circuit share the first multi-way valve 10;

[0064] When the temperature of the power battery 30 is lower than a first preset temperature, the first liquid inlet 101 is connected to the first liquid discharge port 103, and the second liquid inlet 102 is connected to the second liquid discharge port 104, so that the drive motor thermal management circuit is connected to the power battery thermal management circuit;

[0065] When the temperature of the power battery 30 is greater than or equal to the first preset temperature, the first liquid inlet 101 is connected to the second liquid drain port 104, and the second liquid inlet 102 is connected to the first liquid drain port 103, so that the drive motor thermal management circuit is disconnected from the power battery thermal management circuit.

[0066] In this embodiment, the first multi-way valve 10 is provided with a first liquid inlet 101, a second liquid inlet 102, a first liquid discharge port 103 and a second liquid discharge port 104. In actual application, the first multi-way valve 10 can be a four-way solenoid valve. In this embodiment, the drive motor thermal management circuit and the power battery thermal management circuit can share the first multi-way valve 10.

[0067] When the temperature of the power battery 30 is lower than the first preset temperature, the first liquid inlet 101 is connected to the first liquid drain port 103, and the second liquid inlet 102 is connected to the second liquid drain port 104, so that the drive motor thermal management circuit is connected to the power battery thermal management circuit; when the temperature of the power battery 30 is greater than or equal to the first preset temperature, the first liquid inlet 101 is connected to the second liquid drain port 104, and the second liquid inlet 102 is connected to the first liquid drain port 103, so that the drive motor thermal management circuit is disconnected from the power battery thermal management circuit.

[0068] In this embodiment, the first multi-way valve can be controlled to open or close the first liquid inlet, the second liquid inlet, the first liquid outlet, and the second liquid outlet according to the temperature of the power battery to connect or disconnect the drive motor thermal management circuit and the power battery thermal management circuit, thereby achieving heating or heat dissipation of the power battery.

[0069] In a preferred embodiment of the present application, the drive motor thermal management circuit further includes: a radiator 40; the system further includes: a second multi-way valve 50;

[0070] The second multi-way valve 50 is disposed between the drive motor 20 and the radiator 40 ; the radiator 40 is connected between the water tank 60 and the second multi-way valve 50 ;

[0071] When the driving motor 20 needs to dissipate heat, the driving motor 20 and the radiator 40 are connected via the second multi-way valve 50 .

[0072] Specifically, continuing to refer to the thermal management system shown in Figure 1, a radiator 40 is also provided in the thermal management circuit of the drive motor, and the thermal management system also includes a second multi-way valve 50; wherein, the second multi-way valve 50 is provided between the drive motor 20 and the radiator 40, and the radiator 40 is connected between the water tank 60 and the second multi-way valve 50.

[0073] In this embodiment, when the drive motor 20 needs to dissipate heat, the drive motor 20 and the radiator 40 are connected through the second multi-way valve 50. Therefore, the coolant in the thermal management circuit of the drive motor can flow through the radiator 40, thereby cooling the coolant in the thermal management circuit of the drive motor. Then, when the cooled coolant flows through the drive motor 20, the drive motor 20 is cooled and dissipated.

[0074] In some embodiments, the drive motor thermal management circuit is further provided with a motor water pump 21; the power battery thermal management circuit is further provided with a battery water pump 31;

[0075] The second multi-way valve 50 is provided with a third liquid inlet 105, a third liquid outlet 106 and a fourth liquid outlet 107;

[0076] The inlet of the motor water pump 21 is respectively connected to the outlet of the water tank 60, the third drain port 106 and the outlet of the radiator 40, the outlet of the motor water pump 21 is connected to the inlet of the drive motor 20, the outlet of the drive motor 20 is connected to the first liquid inlet 101, the inlet of the radiator 40 is connected to the fourth drain port 107, the inlet of the battery water pump 31 is connected to the first drain port 103, the outlet of the battery water pump 31 is connected to the inlet of the power battery 30, the outlet of the power battery 30 is connected to the inlet of the hot end of the heat exchanger 70, the outlet of the hot end of the heat exchanger 70 is connected to the second liquid inlet 102, and the second drain port 104 is connected to the third liquid inlet 105.

[0077] In this embodiment, with continued reference to FIG1 , a motor water pump 21 is provided in the drive motor thermal management circuit, and a battery water pump 31 is provided in the power battery thermal management circuit. The inlet of the motor water pump 21 is connected to the outlet of the water tank 60, the third liquid drain port 106, and the outlet of the radiator 40, respectively. The outlet of the motor water pump 21 is connected to the inlet of the drive motor 20, which is connected to the first liquid inlet 101. The inlet of the radiator 40 is connected to the fourth liquid drain port 107. The inlet of the battery water pump 31 is connected to the first liquid drain port 103. The outlet of the battery water pump 31 is connected to the inlet of the power battery 30. The outlet of the power battery 30 is connected to the inlet of the hot end of the heat exchanger 70, which is connected to the second liquid inlet 102.

[0078] In this embodiment, the second multi-way valve 50 is provided with a third liquid inlet 105, a third liquid discharge port 106 and a fourth liquid discharge port 107, the inlet of the radiator 40 is connected to the fourth liquid discharge port 107, the second liquid discharge port 104 is connected to the third liquid inlet 105, and the outlet of the hot end of the heat exchanger 70 is connected to the second liquid inlet 102.

[0079] In some embodiments, when the temperature of the power battery 30 is lower than the first preset temperature, the third liquid inlet 105 is connected to the third liquid outlet 106;

[0080] When the temperature of the power battery 30 is greater than or equal to the first preset temperature, the third liquid inlet 105 is communicated with the fourth liquid outlet 107 .

[0081] Specifically, in this embodiment, when the temperature of the power battery 30 is lower than the first preset temperature, the following measures can be taken: the third liquid inlet is connected to the third liquid outlet. This allows the coolant to bypass the radiator 40 and flow into the inlet of the motor water pump 21, thereby preventing the radiator 40 from cooling and dissipating the coolant, thereby maintaining the coolant temperature.

[0082] When the temperature of the power battery 30 reaches or exceeds the first preset temperature, since the drive motor thermal management circuit and the power battery thermal management circuit are in a disconnected state, the drive motor thermal management circuit does not need to heat the power battery 30, so the following measures can be taken: connect the third liquid inlet 105 with the fourth liquid discharge port 107, so that the coolant from the drive motor thermal management circuit flows through the radiator 40, and the coolant is cooled and dissipated by the radiator 40, thereby reducing the temperature of the drive motor 20.

[0083] In a preferred embodiment of the present application, the system further comprises: a refrigerant circulation circuit;

[0084] At least a heat exchanger 70 is provided on the refrigerant circulation circuit;

[0085] The refrigerant circulation circuit and the power battery thermal management circuit exchange heat through the heat exchanger 70 to cool the power battery 30 .

[0086] Continuing to refer to the thermal management system shown in FIG1 , it also includes a refrigerant circulation circuit. Unlike the drive motor thermal management circuit and the power battery thermal management circuit, the drive motor thermal management circuit circulates refrigerant.

[0087] At least one heat exchanger 70 is provided in the refrigerant circulation loop, and heat is exchanged between the refrigerant circulation loop and the power battery thermal management loop via the heat exchanger 70. In this embodiment, when the temperature of the power battery 30 becomes excessively high and requires heat dissipation, the coolant in the power battery thermal management loop and the refrigerant in the refrigerant circulation loop can exchange heat at the heat exchanger 70, thereby dissipating heat from the power battery 30. It should be noted that during the heat exchange at the heat exchanger 70, the coolant and refrigerant circulate in separate pipes and do not come into contact with each other.

[0088] In a preferred embodiment of the present application, the refrigerant circulation circuit includes a primary refrigerant circulation circuit and a secondary refrigerant circulation circuit;

[0089] The primary refrigerant circulation circuit is used to perform primary cooling when the temperature of the power battery 30 is greater than or equal to a first preset temperature and less than a second preset temperature;

[0090] The secondary refrigerant circulation circuit is used to perform secondary cooling when the temperature of the power battery 30 is greater than or equal to the second preset temperature, and the second preset temperature is greater than the first preset temperature.

[0091] Specifically, in this embodiment, the refrigerant circulation circuit as described above specifically includes a primary refrigerant circulation circuit and a secondary refrigerant circulation circuit; wherein, the primary refrigerant circulation circuit is used to perform primary cooling of the power battery 30 when the temperature of the power battery 30 is greater than or equal to a first preset temperature and less than a second preset temperature; the secondary refrigerant circulation circuit is used to perform secondary cooling of the power battery 30 when the temperature of the power battery 30 is greater than or equal to the second preset temperature, and the second preset temperature is greater than the first preset temperature.

[0092] In this embodiment, by setting the refrigerant circulation circuit as a primary refrigerant circulation circuit and a secondary refrigerant circulation circuit, and choosing whether to open the primary refrigerant circulation circuit or the secondary refrigerant circulation circuit specifically according to the temperature of the power battery 30, the energy consumption of the refrigerant circulation circuit can be better optimized, and effective heat dissipation of the power battery 30 can be ensured.

[0093] In some embodiments, the primary refrigerant circulation circuit is provided with: a primary refrigeration component 80, a first switch valve 81; the secondary refrigerant circulation circuit is provided with: a secondary refrigeration component 90, an air compressor 91, and a second switch valve 92;

[0094] The air compressor 91 is arranged between the first-stage refrigeration component 80, the second-stage refrigeration component 90 and the heat exchanger 70. The inlet of the air compressor 91 is connected to the outlet of the cold end of the heat exchanger 70, the outlet of the air compressor 91 is connected to the inlet of the second-stage refrigeration component 90, the outlet of the second-stage refrigeration component 90 is connected to the inlet of the second switch valve 92, the inlet of the first-stage refrigeration component 80 is connected to the outlet of the cold end of the heat exchanger 70, the outlet of the first-stage refrigeration component 80 is connected to the inlet of the first switch valve 81, the outlet of the first switch valve 81 is connected to the inlet of the second switch valve 92, and the outlet of the second switch valve 92 is connected to the inlet of the cold end of the heat exchanger 70.

[0095] In this embodiment, continuing to refer to the thermal management system shown in Figure 1, the refrigerant circulation circuit set in the thermal management system includes a primary refrigerant circulation circuit and a secondary refrigerant circulation circuit, wherein the primary refrigerant circulation circuit is provided with a primary refrigeration component 80 and a first switch valve 81, and the secondary refrigerant circulation circuit is provided with a secondary refrigeration component 90, an air compressor 91 and a second switch valve 92. The flow direction of the refrigerant in the primary refrigerant circulation loop is as follows: the refrigerant flows from the outlet of the cold end of the heat exchanger 70 into the inlet of the primary refrigeration component 80, flows out from the outlet of the primary refrigeration component 80, and finally flows through the first switch valve 81 and the second switch valve 92, and then flows back to the heat exchanger 70 through the inlet of the cold end of the heat exchanger 70; the flow direction of the refrigerant in the secondary refrigerant circulation loop is as follows: the refrigerant flows from the outlet of the cold end of the heat exchanger 70 into the inlet of the air compressor 91, and flows from the outlet of the air compressor 91 into the inlet of the second refrigeration component 90, flows out from the outlet of the second refrigeration component 90, flows through the second switch valve 92, and finally flows back to the heat exchanger 70 through the inlet of the cold end of the heat exchanger 70. In this embodiment, the primary refrigerant circulation loop and the secondary refrigerant circulation loop share the second switch valve 92. It should be noted that, in this embodiment, a temperature control valve is provided between the air compressor 91, the primary refrigeration assembly 80 and the heat exchanger 70. When the temperature of the power battery 30 is between the first preset temperature and the second preset temperature, the vehicle controller can control the temperature control valve to connect to the primary refrigerant circulation loop; and when the temperature of the power battery 30 exceeds the second preset temperature, the vehicle controller can control the temperature control valve to connect to the secondary refrigerant circulation loop.

[0096] As shown in Figure 1, the air compressor 91 is arranged between the first-stage refrigeration component 80, the second-stage refrigeration component 90 and the heat exchanger 70. The inlet of the air compressor 91 is connected to the outlet of the cold end of the heat exchanger 70, the outlet of the air compressor 91 is connected to the inlet of the second-stage refrigeration component 90, the outlet of the second-stage refrigeration component 90 is connected to the inlet of the second switch valve 92, the inlet of the first switch valve 81 is connected to the outlet of the first-stage refrigeration component 80, and the outlet of the second switch valve 92 is connected to the inlet of the cold end of the heat exchanger 70.

[0097] In this embodiment, the primary refrigerant circulation circuit includes a primary refrigeration assembly 80, a first on-off valve 81, and the cold end of the heat exchanger 70. When the temperature of the power battery 30 is between a first preset temperature and a second preset temperature, the primary refrigerant circulation circuit in the refrigerant circulation circuit opens, and the first on-off valve 81 opens, allowing the refrigerant in the primary refrigerant circulation circuit to circulate within the primary refrigerant circulation circuit. At this time, the coolant in the power battery thermal management circuit exchanges heat with the refrigerant in the primary refrigerant circulation circuit in the heat exchanger 70, thereby reducing the temperature of the power battery 30. The secondary refrigerant circulation circuit includes an air compressor 91, the secondary refrigeration assembly 90, a second on-off valve 92, and the cold end of the heat exchanger 70. When the temperature of the power battery 30 exceeds the second preset temperature, the secondary refrigerant circulation circuit of the refrigerant circulation circuit is opened, the air compressor 91 is opened, and the second switch valve 92 is opened. The refrigerant in the secondary refrigerant circulation circuit is cooled by the secondary refrigeration component 90, and then flows through the cold end of the heat exchanger 70 through the second switch valve 92. The coolant in the power battery thermal management circuit and the refrigerant in the secondary refrigerant circulation circuit perform heat exchange in the heat exchanger 70, thereby reducing the temperature of the power battery 30. In actual applications, the primary refrigerant circulation circuit and the secondary refrigerant circulation circuit do not coexist, but the refrigerant in the primary refrigerant circulation circuit and the refrigerant in the secondary refrigerant circulation circuit are the same refrigerant.

[0098] In some preferred embodiments, the refrigerant circulation circuit is further provided with at least one temperature sensor; wherein the plurality of temperature sensors include: a first temperature sensor 100 and a second temperature sensor 110;

[0099] The first temperature sensor 100 is provided on the primary refrigeration assembly 80 and is used to measure the temperature of the refrigerant after being cooled by the primary refrigeration assembly 80;

[0100] The second temperature sensor 110 is disposed on the secondary refrigeration assembly 90 and is used to measure the temperature of the refrigerant after being cooled by the secondary refrigeration assembly 90 .

[0101] In this embodiment, as shown in FIG1 , a first temperature sensor 100 and a second temperature sensor 110 are further provided on the refrigerant circulation circuit. The first temperature sensor 100 is provided on the first refrigerant circulation circuit, and the second temperature sensor 110 is provided on the second refrigerant circulation circuit.

[0102] Specifically, the first temperature sensor 100 is arranged on the first refrigeration component 80 on the first refrigerant circulation loop, and is used to measure the temperature of the refrigerant after being refrigerated by the first refrigeration component 80; the second temperature sensor 110 is arranged on the second refrigeration component 90 on the second refrigerant circulation loop, and is used to measure the temperature of the refrigerant after being refrigerated by the second refrigeration component 90.

[0103] In this embodiment, the temperature of the refrigerant can be monitored by a temperature sensor, and the monitored temperature of the refrigerant can be used to further control the first refrigeration component or the second refrigeration component to lower the temperature of the refrigerant, thereby better cooling and dissipating heat for the power battery.

[0104] In some preferred embodiments, at least one temperature sensor is further provided on the drive motor thermal management circuit, wherein the plurality of temperature sensors include: a third temperature sensor 120 and a fourth temperature sensor 130; the third temperature sensor 120 is located between the motor water pump 21 and the drive motor 20, and the fourth temperature sensor 130 is located between the drive motor 20 and the first multi-way valve 10;

[0105] The third temperature sensor 120 and the fourth temperature sensor 130 are used to measure the temperature of the drive motor 20 .

[0106] In some embodiments, at least one temperature sensor is further provided on the power battery thermal management circuit, wherein the plurality of temperature sensors include: a fifth temperature sensor 140 and a sixth temperature sensor 150;

[0107] The fifth temperature sensor 140 is located between the battery water pump 31 and the power battery 30 , and the sixth temperature sensor 150 is located between the power battery 30 and the heat exchanger 70 ;

[0108] The fifth temperature sensor 140 and the sixth temperature sensor 150 are used to measure the temperature of the power battery 30 .

[0109] Specifically, in this embodiment, the drive motor thermal management circuit is provided with a third temperature sensor 120 and a fourth temperature sensor 130. The third temperature sensor 120 is located between the motor water pump 21 and the drive motor 20 and is used to measure the temperature of the drive motor 20. The fourth temperature sensor 130 is located between the drive motor 20 and the first multi-way valve 10 and is also used to measure the temperature of the drive motor 20. In actual application, the third temperature sensor 120 can measure the temperature of the coolant before entering the drive motor 20, and the fourth temperature sensor 130 can measure the temperature of the coolant after passing through the drive motor 20. By comparing the measurement results of the fourth temperature sensor 130 and the third temperature sensor 120, the temperature change of the drive motor 20 can be determined, and then, based on the temperature change of the drive motor 20, it can be determined whether the drive motor 20 needs to be cooled.

[0110] The power battery thermal management circuit is equipped with a fifth temperature sensor 140 and a sixth temperature sensor 150. The fifth temperature sensor 140 is located between the battery water pump 31 and the power battery 30 and is used to measure the temperature of the power battery 30. The sixth temperature sensor 150 is located between the power battery 30 and the heat exchanger 70 and is also used to measure the temperature of the power battery 30. In actual application, the fifth temperature sensor 140 can measure the temperature of the coolant before entering the power battery 30, and the sixth temperature sensor 150 can measure the temperature of the coolant after passing through the power battery 30. By comparing the measurement results of the fifth temperature sensor 140 and the sixth temperature sensor 150, the temperature change of the power battery 30 can be determined, and then, based on the temperature change of the power battery 30, it can be determined whether the power battery 30 needs to be heated or cooled.

[0111] In this embodiment, by setting multiple temperature sensors in the drive motor thermal management circuit and the power battery thermal management circuit respectively, the temperature of each component can be monitored more accurately in real time, and the thermal management strategy can be adjusted as needed to ensure that the entire thermal management system can better achieve thermal management control.

[0112] An embodiment of the present application provides a thermal management system comprising a drive motor thermal management circuit, a power battery thermal management circuit, and a refrigerant circulation circuit. The drive motor thermal management circuit and the power battery thermal management circuit are integrated via a first multi-way valve, and the power battery thermal management circuit and the refrigerant circulation circuit are integrated via a heat exchanger. When the drive motor thermal management circuit requires independent heat dissipation, the first and second multi-way valves can be used to connect the drive motor to a radiator, allowing heat dissipation from the drive motor. When the power battery requires heating, the first multi-way valve connects the drive motor thermal management circuit to the power battery thermal management circuit, allowing the coolant in the drive motor thermal management circuit to heat the power battery. Simultaneously, the second multi-way valve disconnects the drive motor from the radiator, preventing the radiator from dissipating heat to the coolant in the drive motor thermal management circuit, thereby maintaining heat. When the power battery requires heat dissipation, the first multi-way valve disconnects the drive motor thermal management circuit from the power battery thermal management circuit, preventing the coolant in the drive motor thermal management circuit from heating the power battery. Simultaneously, the refrigerant circulation circuit cools the coolant in the power battery thermal management circuit, thereby dissipating heat from the power battery. In this application, by integrating different circuits, not only can the heat of the drive motor thermal management circuit be used to assist in heating the power battery when the power battery needs to be heated, but the power requirements for the selection of the electric heating module can be appropriately reduced, and the cost of the entire vehicle can be reduced. In addition, the energy consumption during electric heating can be reduced, and the heat energy in the drive motor thermal management circuit can be recovered at the same time, thereby improving the energy utilization efficiency of the entire vehicle and having the power battery heat dissipation function. In addition, the integration of the drive motor thermal management circuit, the power battery thermal management circuit and the refrigerant circulation circuit can simplify the piping layout, make assembly simpler, maintenance and repair easier, and reduce the cost of the entire vehicle.

[0113] Based on the same inventive concept, the second aspect of the present application provides a thermal management method applied to a vehicle controller. The method is shown in FIG2 and includes:

[0114] Step S101, respectively acquiring the temperature of the power battery in the power battery thermal management circuit and the temperature of the drive motor in the drive motor thermal management circuit;

[0115] Step S102, when the temperature of the power battery is lower than a first preset temperature, connecting the power battery thermal management circuit and the drive motor thermal management circuit through a first multi-way valve, so that the drive motor thermal management circuit heats the power battery; or

[0116] Step S103 : When the temperature of the power battery is greater than or equal to the first preset temperature, the power battery thermal management circuit and the drive motor thermal management circuit are disconnected through the first multi-way valve, so that the drive motor thermal management circuit stops heating the power battery.

[0117] Specifically, in this embodiment, referring to the flow chart of the thermal management method shown in FIG3 , the temperature of the power battery in the power battery thermal management circuit and the temperature of the drive motor in the drive motor thermal management circuit are respectively obtained through the vehicle controller. In this embodiment, the vehicle controller obtains the temperature of the power battery from the fifth temperature sensor and the sixth temperature sensor arranged on both sides of the power battery, and obtains the temperature of the drive motor from the third temperature sensor and the fourth temperature sensor arranged on both sides of the drive motor.

[0118] Furthermore, the power battery temperature is monitored to determine whether it is less than a first preset temperature. If the power battery temperature is less than the first preset temperature, indicating that the power battery requires heating, the vehicle controller controls the first liquid inlet of the first multi-way valve to connect with the first liquid outlet, and the second liquid inlet to connect with the second liquid outlet, to connect the drive motor thermal management circuit with the power battery thermal management circuit, thereby allowing coolant in the drive motor thermal management circuit to flow into the power battery thermal management circuit, thereby heating the power battery. If the power battery temperature is greater than or equal to the first preset temperature, the vehicle controller controls the first liquid inlet of the first multi-way valve to connect with the second liquid outlet, and the second liquid inlet to connect with the first liquid outlet, to disconnect the drive motor thermal management circuit from the power battery thermal management circuit, thereby preventing coolant in the drive motor thermal management circuit from flowing into the power battery thermal management circuit, thereby preventing further heating of the power battery.

[0119] In a preferred embodiment, when the temperature of the power battery is greater than or equal to the first preset temperature, and / or the temperature of the drive motor is greater than or equal to the third preset temperature, the drive motor is connected to the radiator through a second multi-way valve so that the radiator dissipates heat for the drive motor.

[0120] Specifically, the vehicle controller monitors whether the temperature of the drive motor is greater than or equal to the third preset temperature by obtaining the temperature of the drive motor. If the temperature of the drive motor is greater than or equal to the third preset temperature, the vehicle controller controls the third liquid inlet and the fourth liquid outlet of the second multi-way valve to be connected, so that the drive motor in the drive motor thermal management circuit is connected to the radiator. When the coolant in the drive motor thermal management circuit flows through the radiator, it dissipates heat, thereby achieving the purpose of heat dissipation of the drive motor.

[0121] In a preferred embodiment, when the temperature of the power battery is greater than or equal to the first preset temperature and less than a second preset temperature, the power battery thermal management circuit is controlled to perform heat exchange with the primary refrigerant circulation circuit to perform primary cooling of the power battery; or, when the temperature of the power battery is greater than or equal to the second preset temperature, the power battery thermal management circuit is controlled to perform heat exchange with the secondary refrigerant circulation circuit to perform secondary cooling of the power battery, and the second preset temperature is greater than the first preset temperature.

[0122] Specifically, when the vehicle controller detects that the power battery temperature is greater than or equal to a first preset temperature and less than a second preset temperature, it controls the power battery thermal management circuit to exchange heat with the refrigerant circulation circuit. Specifically, it controls the power battery thermal management circuit to exchange heat with the primary refrigerant circulation circuit, thereby providing primary cooling for the power battery through the primary refrigerant circulation circuit. When the vehicle controller detects that the power battery temperature is greater than or equal to the second preset temperature, it controls the power battery thermal management circuit to exchange heat with the refrigerant circulation circuit. Specifically, it controls the power battery thermal management circuit to exchange heat with the secondary refrigerant circulation circuit, thereby providing secondary cooling for the power battery through the secondary refrigerant circulation circuit. In this embodiment, when the primary refrigerant circulation circuit is activated, the primary refrigeration assembly and the first on-off valve are opened, and the refrigerant in the primary refrigerant circulation circuit circulates within the primary refrigerant circulation circuit. At this time, the coolant in the power battery thermal management circuit and the refrigerant in the primary refrigerant circulation circuit exchange heat in the heat exchanger, thereby reducing the temperature of the power battery. When the secondary refrigerant circulation circuit is activated, the air compressor, the secondary refrigeration assembly, and the second on-off valve are opened. When the temperature of the power battery exceeds the second preset temperature, the secondary refrigerant circulation loop of the refrigerant circulation loop is started, the air compressor is turned on, and the second switch valve is opened. The refrigerant in the secondary refrigerant circulation loop is cooled by the secondary refrigeration component and then flows through the cold end of the heat exchanger through the second switch valve. The coolant in the power battery thermal management loop and the refrigerant in the secondary refrigerant circulation loop exchange heat in the heat exchanger, thereby reducing the temperature of the power battery.

[0123] Based on the same inventive concept, the third aspect of the present application provides a vehicle, which includes the thermal management system as described in the first aspect of the present application, and / or executes the thermal management method as described in the second aspect of the present application.

[0124] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0125] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0126] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0127] The above is a detailed introduction to a thermal management system, method and vehicle provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A thermal management system, characterized in that, The system at least includes: a drive motor thermal management circuit, a power battery thermal management circuit, and a first multi-way valve (10); Among them, the drive motor thermal management circuit at least includes: a drive motor (20); The power battery thermal management circuit at least includes: a power battery (30); The first multi-way valve (10) is arranged between the drive motor thermal management circuit and the power battery thermal management circuit; When the power battery (30) needs to be heated, the drive motor thermal management circuit and the power battery thermal management circuit are connected through the first multi-way valve (10); When the power battery (30) needs to dissipate heat, the drive motor thermal management circuit and the power battery thermal management circuit are disconnected through the first multi-way valve (10).

2. The thermal management system according to claim 1, characterized in that, The drive motor thermal management circuit further includes: a radiator (40); the system further includes: a second multi-way valve (50); The second multi-way valve (50) is arranged between the drive motor (20) and the radiator (40); the radiator (40) is connected between the water tank (60) and the second multi-way valve (50); When the drive motor (20) needs to dissipate heat, the drive motor (20) and the radiator (40) are connected through the second multi-way valve (50).

3. The thermal management system according to claim 2, wherein The system further includes: a refrigerant circulation circuit; At least an exchanger (70) is arranged on the refrigerant circulation circuit; Heat exchange is carried out between the refrigerant circulation circuit and the power battery thermal management circuit through the exchanger (70) to cool the power battery (30).

4. The thermal management system according to claim 3, characterized in that, The refrigerant circulation circuit includes a primary refrigerant circulation circuit and a secondary refrigerant circulation circuit; The primary refrigerant circulation circuit is used for primary cooling when the temperature of the power battery (30) is greater than or equal to a first preset temperature and less than a second preset temperature; The secondary refrigerant circulation circuit is used for secondary cooling when the temperature of the power battery (30) is greater than or equal to the second preset temperature, and the second preset temperature is greater than the first preset temperature.

5. The thermal management system according to claim 4, characterized in that, The primary refrigerant circulation circuit is provided with: a primary refrigeration component (80), a first switching valve (81); the secondary refrigerant circulation circuit is provided with: a secondary refrigeration component (90), an air compressor (91), a second switching valve (92); The air compressor (91) is arranged between the primary refrigeration assembly (80), the secondary refrigeration assembly (90) and the heat exchanger (70). The inlet of the air compressor (91) is communicated with the outlet of the cold end of the heat exchanger (70), the outlet of the air compressor (91) is communicated with the inlet of the secondary refrigeration assembly (90), the outlet of the secondary refrigeration assembly (90) is communicated with the inlet of the second switching valve (92), the inlet of the primary refrigeration assembly (80) is communicated with the outlet of the cold end of the heat exchanger (70), the outlet of the primary refrigeration assembly (80) is communicated with the inlet of the first switching valve (81), the outlet of the first switching valve (81) is communicated with the inlet of the second switching valve (92), and the outlet of the second switching valve (92) is communicated with the inlet of the cold end of the heat exchanger (70).

6. The thermal management system according to claim 3, characterized in that, The first multi-way valve (10) is provided with: a first liquid inlet (101), a second liquid inlet (102), a first liquid outlet (103) and a second liquid outlet (104); Wherein, the driving motor thermal management loop and the power battery thermal management loop share the first multi-way valve (10); When the temperature of the power battery (30) is lower than the first preset temperature, the first liquid inlet (101) is communicated with the first liquid outlet (103), and the second liquid inlet (102) is communicated with the second liquid outlet (104), so that the driving motor thermal management loop is communicated with the power battery thermal management loop; When the temperature of the power battery (30) is greater than or equal to the first preset temperature, the first liquid inlet (101) is communicated with the second liquid outlet (104), and the second liquid inlet (102) is communicated with the first liquid outlet (103), so that the driving motor thermal management loop is disconnected from the power battery thermal management loop.

7. The thermal management system according to claim 6, wherein A motor water pump (21) is further arranged on the driving motor thermal management loop; a battery water pump (31) is further arranged on the power battery thermal management loop; The second multi-way valve (50) is provided with a third liquid inlet (105), a third liquid outlet (106) and a fourth liquid outlet (107); The inlet of the motor water pump (21) is respectively communicated with the outlet of the water tank (60), the third liquid outlet (106) and the outlet of the radiator (40). The outlet of the motor water pump (21) is communicated with the inlet of the driving motor (20). The outlet of the driving motor (20) is communicated with the first liquid inlet (101). The inlet of the radiator (40) is communicated with the fourth liquid outlet (107). The inlet of the battery water pump (31) is communicated with the first liquid outlet (103). The outlet of the battery water pump (31) is communicated with the inlet of the power battery (30). The outlet of the power battery (30) is communicated with the inlet of the hot end of the heat exchanger (70). The outlet of the hot end of the heat exchanger (70) is communicated with the second liquid inlet (102). The second liquid outlet (104) is communicated with the third liquid inlet (105).

8. The thermal management system according to claim 7, wherein When the temperature of the power battery (30) is less than the first preset temperature, the third liquid inlet (105) is communicated with the third liquid outlet (106); When the temperature of the power battery (30) is greater than or equal to the first preset temperature, the third liquid inlet (105) is communicated with the fourth liquid outlet (107).

9. The thermal management system according to claim 3, wherein, At least one temperature sensor is provided in the drive motor thermal management circuit, the power battery thermal management circuit, and the refrigerant circulation circuit; Among them, the temperature sensor provided in the drive motor thermal management circuit is used to measure the temperature of the drive motor (20), the temperature sensor provided in the power battery thermal management circuit is used to measure the temperature of the power battery (30), and the temperature sensor provided in the refrigerant circulation circuit is used to measure the temperature of the refrigerant after being cooled by the refrigerant circulation circuit.

10. A thermal management method, characterized in that, The method is applied to the thermal management system according to any one of claims 1-9, and the method includes: Obtaining the temperature of the power battery in the power battery thermal management circuit and the temperature of the drive motor in the drive motor thermal management circuit respectively; When the temperature of the power battery is less than the first preset temperature, the power battery thermal management circuit and the drive motor thermal management circuit are connected through a first multi-way valve, so that the drive motor thermal management circuit heats the power battery; or, When the temperature of the power battery is greater than or equal to the first preset temperature, the power battery thermal management circuit and the drive motor thermal management circuit are disconnected through the first multi-way valve, so that the drive motor thermal management circuit stops heating the power battery. The method further includes:

11. The thermal management method according to claim 10, wherein When the temperature of the power battery is greater than or equal to the first preset temperature, and / or the temperature of the drive motor is greater than or equal to the third preset temperature, the drive motor is connected to the radiator through a second multi-way valve, so that the radiator dissipates heat from the drive motor. The method further includes:

12. The thermal management method according to claim 10, wherein When the temperature of the power battery is greater than or equal to the first preset temperature and less than the second preset temperature, controlling heat exchange between the power battery thermal management circuit and the primary refrigerant circulation circuit to perform primary cooling on the power battery; or, When the temperature of the power battery is greater than or equal to the second preset temperature, controlling heat exchange between the power battery thermal management circuit and the secondary refrigerant circulation circuit to perform secondary cooling on the power battery, and the second preset temperature is greater than the first preset temperature. The vehicle includes the thermal management system according to any one of claims 1-9, and / or executes the thermal management method according to any one of claims 10-12.

13. A vehicle, characterized in that, ​

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