Vehicle thermal management system and control method thereof

Abstract

The present invention provides a vehicle thermal management system, a control method for the vehicle thermal management system, and a vehicle. The system includes: a motor heat exchange circuit, a low-temperature heat dissipation circuit, a battery heat exchange circuit, a heat exchange circuit, a heat pump heat exchange circuit, and an engine heat exchange circuit. The motor heat exchange circuit is connected to the heat exchange circuit via a first control valve, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit via a second control valve. The battery heat exchange circuit is connected to the heat exchange circuit and the first control valve, respectively, via a third control valve. The heat exchange circuit is provided with a first heat exchange module and a second heat exchange module. The heat pump heat exchange circuit is connected to the second heat exchange module. The engine heat exchange circuit is connected to the heater module and the first heat exchange module, respectively, via a fourth control valve. The system also includes an onboard charger and a transmission oil cooler connected in parallel with the motor module in the motor heat exchange circuit. The present invention can improve energy utilization and vehicle endurance in new energy vehicles.

Description

Technical Field

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

[0002] In order to adapt to the increasingly severe energy crisis, the current automotive industry is committed to research on reducing vehicle energy consumption. Among them, new energy vehicles are receiving more and more attention.

[0003] Currently, the range reduction of pure electric vehicles in winter continues to plague OEMs in new energy vehicle technology. Range is primarily limited by battery charge. However, in new energy vehicles, the energy required for heating the battery and the passenger compartment comes from the battery, further straining the limited energy storage capacity. Therefore, improving energy utilization in new energy vehicles, thereby extending range for the same battery charge, is crucial to enhancing product competitiveness and user experience. Summary of the Invention

[0004] The embodiments of the present invention provide a vehicle thermal management system and a control method thereof to solve the problem that the energy utilization rate of new energy vehicles needs to be improved.

[0005] In a first aspect, an embodiment of the present invention provides a vehicle thermal management system, comprising: a motor heat exchange circuit, a low-temperature heat dissipation circuit, a battery heat exchange circuit, a heat exchange circuit, a heat pump heat exchange circuit, and an engine heat exchange circuit;

[0006] The motor heat exchange circuit is connected to the heat exchange circuit via a first control valve, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit via a second control valve; the battery heat exchange circuit is connected to the heat exchange circuit and the first control valve respectively via a third control valve; the heat exchange circuit is provided with a first heat exchange module and a second heat exchange module; the heat pump heat exchange circuit is connected to the second heat exchange module; the engine heat exchange circuit is connected to the heater module and the first heat exchange module respectively via a fourth control valve;

[0007] The vehicle thermal management system also includes an on-board charger and a transmission oil cooler connected in parallel with the motor module in the motor heat exchange circuit.

[0008] In a possible implementation, the motor heat exchange circuit includes a motor module, and the low-temperature heat dissipation circuit includes a low-temperature radiator;

[0009] The motor heat exchange circuit is connected to the heat exchange circuit through a first control valve, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit through a second control valve, including:

[0010] One end of the motor module is connected to the first end of the first heat exchange module through the first valve port and the fourth valve port of the first control valve, the second end of the first heat exchange module is connected to the first end of the second heat exchange module, and the second end of the second heat exchange module is connected to the other end of the motor module;

[0011] One end of the motor module is also connected to the first valve port of the second control valve through the first valve port and the second valve port of the first control valve, the second valve port of the second control valve is connected to one end of the low-temperature radiator, the other end of the low-temperature radiator is connected to the third valve port of the second control valve, and the fourth valve port of the second control valve is connected to the other end of the motor module.

[0012] In one possible implementation, the vehicle thermal management system further includes a fifth control valve;

[0013] The vehicle thermal management system further includes an onboard charger and a transmission oil cooler connected in parallel with the motor module in the motor heat exchange circuit, including:

[0014] The first valve port of the fifth control valve is connected to one end of the on-board charger, the other end of the on-board charger is connected to one end of the transmission oil cooler, the other end of the transmission oil cooler is connected to one end of the motor module, the second valve port of the fifth control valve is connected to the other end of the motor module, and the third valve port of the fifth control valve is connected to the fourth valve port of the second control valve.

[0015] In one possible implementation, the battery heat exchange circuit includes a battery module;

[0016] The battery heat exchange circuit is connected to the heat exchange circuit and the first control valve respectively through a third control valve, including:

[0017] One end of the battery module is connected to the first valve port of the third control valve, the second valve port of the third control valve is connected to the third valve port of the first control valve, the third valve port of the third control valve is connected to the second end of the second heat exchange module, and the fourth valve port of the third control valve is connected to the other end of the battery module.

[0018] In a possible implementation, the heat pump heat exchange circuit includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a gas-liquid separator;

[0019] The heat pump heat exchange circuit is connected to the second heat exchange module, and includes:

[0020] One end of the compressor is connected to one end of the indoor heat exchanger, the other end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger via a first electronic expansion valve, the other end of the outdoor heat exchanger is connected to one end of the gas-liquid separator via a first stop valve, and the other end of the gas-liquid separator is connected to the other end of the compressor;

[0021] The other end of the indoor heat exchanger is also connected to the third end of the second heat exchange module through a second stop valve and a second electronic expansion valve, the fourth end of the second heat exchange module is connected to the first valve port of the sixth control valve, and the third valve port of the sixth control valve is connected to one end of the gas-liquid separator; the second valve port of the sixth control valve is connected between the first electronic expansion valve and the other end of the indoor heat exchanger; the other end of the outdoor heat exchanger is also connected to one end of the third stop valve, and the other end of the third stop valve is connected between the second stop valve and the second electronic expansion valve in one path, and is connected to one end of the gas-liquid separator through the third electronic expansion valve and the evaporator in the other path.

[0022] In one possible implementation, the engine heat exchange circuit includes an engine module and a high-temperature radiator;

[0023] The engine heat exchange circuit is connected to the heater module and the first heat exchange module respectively through a fourth control valve, including:

[0024] One end of the engine module is connected to one end of the high-temperature radiator, and the other end of the high-temperature radiator is connected to the other end of the engine module; the other end of the engine module is also connected to one end of the heater module through the third valve port and the first valve port of the fourth control valve, and the other end of the heater module is connected to one end of the engine module; the other end of the engine module is also connected to the third end of the first heat exchange module through the third valve port and the second valve port of the fourth control valve, and the fourth end of the first heat exchange module is connected between the third valve port of the third control valve and the other end of the engine module.

[0025] In a second aspect, an embodiment of the present invention provides a control method for a vehicle thermal management system, which is applied to the vehicle thermal management system described in the first aspect or any possible implementation of the first aspect, the control method comprising:

[0026] Acquiring vehicle parameters, and determining a required operating condition of the vehicle thermal management system based on the vehicle parameters;

[0027] Control the conduction directions of the first control valve, the second control valve, the third control valve, and the fourth control valve in the vehicle thermal management system so that the vehicle thermal management system operates in the required working conditions.

[0028] In one possible implementation, controlling the conduction directions of the first control valve, the second control valve, the third control valve, and the fourth control valve in the vehicle thermal management system so that the vehicle thermal management system operates in the desired operating condition includes:

[0029] If the required operating condition is motor heat storage, controlling the first control valve to disconnect the motor module in the motor heat exchange circuit from the heat exchange circuit, and controlling the second control valve to disconnect the motor module from the low-temperature heat dissipation circuit, so that the motor can store heat;

[0030] If the required operating condition is battery temperature equalization, the third control valve is controlled to disconnect the battery heat exchange circuit from the heat exchange circuit and the first control valve, so that the battery self-circulates and equalizes temperature.

[0031] In one possible implementation, controlling the conduction directions of the first control valve, the second control valve, and the third control valve in the vehicle thermal management system so that the vehicle thermal management system operates in the desired operating condition includes:

[0032] If the required operating condition is that the heat pump absorbs motor waste heat while the battery equalizes temperature, the first control valve is controlled to connect the motor module in the motor heat exchange circuit to the heat exchange circuit, and the third control valve is controlled to disconnect the battery heat exchange circuit from the heat exchange circuit and the first control valve, so that the heat pump heat exchange circuit is connected to the motor module in the motor heat exchange circuit through the heat exchange circuit, so that the heat pump absorbs motor waste heat while the battery self-circulates and equalizes temperature;

[0033] If the desired operating condition is that the engine waste heat heats the battery, the third control valve is controlled to connect the battery heat exchange circuit with the heat exchange circuit, and the fourth control valve is controlled to connect the engine heat exchange circuit with the first heat exchange module in the heat exchange circuit, so that the battery heat exchange circuit is connected to the engine heat exchange circuit through the first heat exchange module, so that the engine waste heat heats the battery;

[0034] If the required working condition is that the engine waste heat heats the motor, the first control valve is controlled to connect the motor module in the motor heat exchange circuit with the heat exchange circuit, and the fourth control valve is controlled to connect the engine heat exchange circuit with the first heat exchange module in the heat exchange circuit, so that the motor heat exchange circuit and the engine heat exchange circuit are connected through the first heat exchange module, so that the engine waste heat heats the motor.

[0035] An embodiment of the present invention provides a whole vehicle thermal management system, a control method for the whole vehicle thermal management system, and a vehicle, wherein the motor heat exchange circuit of the system is connected to the heat exchange circuit through a first control valve, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit through a second control valve; the battery heat exchange circuit is connected to the heat exchange circuit and the first control valve respectively through a third control valve; a first heat exchange module and a second heat exchange module are provided on the heat exchange circuit; the heat pump heat exchange circuit is connected to the second heat exchange module; the engine heat exchange circuit is connected to the heater module and the first heat exchange module respectively through a fourth control valve; the whole vehicle thermal management system also includes an on-board charger and a transmission oil cooler connected in parallel with the motor module in the motor heat exchange circuit. Therefore, when needed, the first control valve and the second control valve can be used to form a motor heat storage circuit, so that the motor heat storage circuit can store heat and keep warm. When the temperature is appropriate, the first control valve and the third control valve can be used to transfer heat to the heat pump, so that the heat pump can absorb all the energy that can be absorbed, and widen the operating ambient temperature of the heat pump; or the first control valve, the third control valve and the fourth control valve can be used to allow the engine waste heat to heat the battery or the motor, so as to save energy while making the motor or the battery work at the optimal working temperature; or the first control valve and the third control valve can be used to allow the heat pump to heat the battery, so as to reduce the energy consumption of the battery heating system; thus, based on the connection of the motor heat exchange circuit, the battery heat exchange circuit, the heat pump heat exchange circuit and the engine heat exchange circuit, the energy utilization rate in the new energy vehicle is improved, thereby improving the endurance of the entire vehicle and making the product more competitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 Schematic diagram of the structure of a vehicle thermal management system provided by an embodiment of the present invention;

[0038] Figure 2 Schematic diagram of the heat storage path of the motor heat storage circuit provided by an embodiment of the present invention;

[0039] Figure 3 Schematic diagram of the path of the self-circulating temperature equalization of the battery circuit provided by an embodiment of the present invention;

[0040] Figure 4 Schematic diagram of a path for heating a motor with engine waste heat according to an embodiment of the present invention;

[0041] Figure 5This is a schematic diagram of a path for a heat pump to simultaneously absorb ambient heat and motor waste heat while the battery circuit self-circulates and equalizes temperature, as provided by an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of a path for a heat pump to absorb waste heat from a motor while a battery circuit self-circulates and equalizes temperature, as provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below with reference to the accompanying drawings.

[0045] like Figure 1 As shown, the vehicle thermal management system provided by the embodiment of the present invention includes: a motor heat exchange circuit, a low-temperature heat dissipation circuit, a battery heat exchange circuit, a heat exchange circuit, a heat pump heat exchange circuit and an engine heat exchange circuit; the motor heat exchange circuit in this embodiment is a circuit formed by connecting the motor module 10, the first control valve 11 (V1-V2), and the second control valve (V1-V4); the low-temperature heat dissipation circuit is a circuit formed by connecting the low-temperature radiator 13 and the second control valve 12 (V2-V3); the battery heat exchange circuit is a circuit formed by connecting the battery module 20 and the third control valve 21 (V1-V4); the heat exchange circuit is a circuit formed by connecting the first heat exchange module 22 and the second heat exchange module 23; the heat pump heat exchange circuit is a circuit formed by connecting the compressor 30, the indoor heat exchanger 31, the outdoor heat exchanger 32, and the gas-liquid separator 33; the engine heat exchange circuit is a circuit formed by connecting the engine module 40 and the high-temperature radiator 44. The motor heat exchange circuit is connected to the heat exchange circuit through the first control valve 11, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit through the second control valve 12; the battery heat exchange circuit is connected to the heat exchange circuit and the first control valve 11 respectively through the third control valve 21; the heat exchange circuit is provided with a first heat exchange module 22 and a second heat exchange module 23; the heat pump heat exchange circuit is connected to the second heat exchange module 23; the engine heat exchange circuit is connected to the heater module 41 and the first heat exchange module 22 respectively through the fourth control valve 42.

[0046] The vehicle thermal management system further includes an on-board charger 14 and a transmission oil cooler 15 connected in parallel with the motor module 10 in the motor heat exchange circuit.

[0047] Optional, such as Figure 1As shown, the motor heat exchange circuit includes a motor module 10, and the low-temperature heat dissipation circuit includes a low-temperature radiator 13; one end of the motor module 10 is connected to the first end of the first heat exchange module 22 through the first valve port V1 and the fourth valve port V4 of the first control valve 11, the second end of the first heat exchange module 22 is connected to the first end of the second heat exchange module 23, and the second end of the second heat exchange module 23 is connected to the other end of the motor module 10; one end of the motor module 10 is also connected to the first valve port V1 of the second control valve 12 through the first valve port V1 and the second valve port V2 of the first control valve 11, the second valve port V2 of the second control valve 12 is connected to one end of the low-temperature radiator 13, the other end of the low-temperature radiator 13 is connected to the third valve port V3 of the second control valve 12, and the fourth valve port V4 of the second control valve 12 is connected to the other end of the motor module 10.

[0048] Optional, such as Figure 1 As shown, the vehicle thermal management system also includes a fifth control valve 16; the first valve port 1 of the fifth control valve 16 is connected to one end of the on-board charger 14, the other end of the on-board charger 14 is connected to one end of the transmission oil cooler 15, the other end of the transmission oil cooler 15 is connected to one end of the motor module 10, the second valve port 2 of the fifth control valve 16 is connected to the other end of the motor module 10, and the third valve port 3 of the fifth control valve 16 is connected to the fourth valve port V4 of the second control valve 12.

[0049] Optional, such as Figure 1 As shown, the battery heat exchange circuit includes a battery module 20; one end of the battery module 20 is connected to the first valve port V1 of the third control valve 21, the second valve port V2 of the third control valve 21 is connected to the third valve port V3 of the first control valve 11, the third valve port V3 of the third control valve 21 is connected to the second end of the second heat exchange module 23, and the fourth valve port V4 of the third control valve 21 is connected to the other end of the battery module 20.

[0050] Optional, such as Figure 1As shown, the heat pump heat exchange circuit includes a compressor 30, an indoor heat exchanger 31, an outdoor heat exchanger 32, and a gas-liquid separator 33; one end of the compressor 30 is connected to one end of the indoor heat exchanger 31, the other end of the indoor heat exchanger 31 is connected to one end of the outdoor heat exchanger 32 through a first electronic expansion valve 35a, the other end of the outdoor heat exchanger 32 is connected to one end of the gas-liquid separator 33 through a first stop valve 36a, and the other end of the gas-liquid separator 33 is connected to the other end of the compressor 30; the other end of the indoor heat exchanger 31 is also connected to the second end of the second heat exchange module 23 through a second stop valve 36b and a second electronic expansion valve 35b. The three ends are connected, the fourth end of the second heat exchange module 23 is connected to the first valve port 1 of the sixth control valve 34, and the third valve port 3 of the sixth control valve 34 is connected to one end of the gas-liquid separator 33; the third valve port 3 of the sixth control valve 34 is connected between the first electronic expansion valve 35a and the other end of the indoor heat exchanger 31; the other end of the outdoor heat exchanger 32 is also connected to one end of the third stop valve 36c, and the other end of the third stop valve 36c is connected between the second stop valve 36b and the second electronic expansion valve 35b, and the other end is connected to one end of the gas-liquid separator 33 through the third electronic expansion valve 35c and the evaporator 37.

[0051] Optional, such as Figure 1 As shown, the engine heat exchange circuit includes an engine module 40 and a high-temperature radiator 44; one end of the engine module 40 is connected to one end of the high-temperature radiator 44, and the other end of the high-temperature radiator is connected to the other end of the engine module 40; the other end of the engine module 40 is also connected to one end of the heater module 41 through the third valve port 3 and the first valve port 1 of the fourth control valve 42, and the other end of the heater module 41 is connected to one end of the engine module 40; the other end of the engine module 40 is also connected to the third end of the first heat exchange module 22 through the third valve port 3 and the second valve port 2 of the fourth control valve 42, and the fourth end of the first heat exchange module 22 is connected between the third valve port 3 of the fourth control valve 42 and the other end of the engine module 40.

[0052] It should be noted that if Figure 1 As shown, the vehicle thermal management system also includes overflow tanks 50a and 50b, which are used to pass coolant into the motor heat exchange circuit, the battery heat exchange circuit, and the engine heat exchange circuit to transfer heat through the flow of coolant. The three heat exchange circuits are all connected to electronic water pumps (i.e., the motor water pump 60a, the battery water pump 60b, and the engine water pump 60c in the figure) to provide flow power for the coolant. The three heat exchange circuits are also connected to one-way throttle valves 70a, 70b, and 70c to control the flow and direction of the coolant. The engine heat exchange circuit can also include a thermostat 43; one end of the engine module 40 is connected to one end of the high-temperature radiator 44 and the other end of the heater module 41 through the thermostat 43; the thermostat 43 is used to adjust the flow direction of the cooling water according to the temperature of the cooling water.

[0053] For example, the first control valve 11 , the second control valve 12 , and the third control valve 21 may all be four-way solenoid valves, and the fourth control valve 42 , the fifth control valve 16 , and the sixth control valve 34 may all be three-way solenoid valves.

[0054] Among them, when the valve port V1 and the valve port V2 of the first control valve 11 are connected, the valve port V1 and the valve port V2 of the second control valve 12 are connected, and the valve port V3 and the valve port V4 of the second control valve 12 are connected, the low-temperature radiator 13 (i.e. Figure 1 The low-temperature radiator LT RAD in the motor module 10 dissipates heat. The path for the low-temperature radiator LT RAD to dissipate heat for the motor module 10 is:

[0055] Motor water pump 60a → fifth control valve 16 (3, 2-way) → motor module 10 → first control valve 11 (V1→V2) → second control valve 12 (V1→V2) → low-temperature radiator LTRAD → overflow tank 50a → second control valve 12 (V3→V4) → motor water pump 60a.

[0056] Exemplarily, the motor module 10 may include a P2.5 MCU, a DC / DC, a P4 three-in-one controller, and a motor. When the motor starts, the motor generates heat. If the temperature is too high, it will affect the normal operation of the motor. In this embodiment, a low-temperature radiator LT RAD can be used to dissipate heat from the motor module 10 so that the motor can operate at a suitable temperature.

[0057] When the valve port V1 and the valve port V2 of the first control valve 11 are connected, and the valve port V1 and the valve port V4 of the second control valve 12 are connected, a motor heat storage circuit is formed to store heat in the motor heat storage circuit. Figure 2 As shown in the figure, the heat storage path of the motor heat storage circuit is:

[0058] Motor water pump 60a → fifth control valve 16 (3, 2-way) → motor module 10 → first control valve 11 (V1 → V2) → second control valve 12 (V1 → V4) → motor water pump 60a.

[0059] In this embodiment, if the temperature of the motor is within the normal operating temperature range, there is no need to dissipate heat from the motor. The low-temperature radiator 13 can be disconnected from the motor module 10 through the second control valve 12, thereby forming a motor heat storage circuit to provide the motor with heat preservation and heat storage effects, so that when the temperature is appropriate, the heat can be supplied to the battery or heat pump.

[0060] When the valve ports V1 and V2 of the first control valve 11 are connected, the valve ports V1 and V2 of the second control valve 12 are connected, the valve ports V3 and V4 are connected, and the valve ports V3 and V2 of the fifth control valve 16 are connected, the low-temperature radiator LT RAD cools the on-board charger 14 and the transmission oil cooler 15 connected in series. The cooling path of the low-temperature radiator LT RAD for cooling the on-board charger 14 and the transmission oil cooler 15 in series is as follows:

[0061] Motor water pump 60a → fifth control valve 16 (3, 2-way) → OBC 14 → transmission oil cooler 15 → first control valve 11 (V1 → V2) → second control valve 12 (V1 → V2) → low-temperature radiator LT RAD → overflow tank 50a → second control valve 12 (V3 → V4) → motor water pump 60a.

[0062] like Figure 1 As shown, the transmission oil cooler 15 is connected in series to the onboard charger 14 (i.e. Figure 1 The LT RAD is connected to the circuit containing the OBC (onboard charger) and also in series with the circuit containing the transmission 17. By connecting the transmission oil cooler 15 in series with the onboard charger 14 and then in parallel with the motor module 10, the low-temperature radiator LT RAD can be used to cool the transmission oil cooler and OBC when necessary. When cooling the transmission oil cooler and OBC is not necessary, only the motor module 10 is cooled, thereby saving water pump energy.

[0063] When the valve ports V3 and V2 of the first control valve 11 are in communication, the valve ports V1 and V2 of the second control valve 12 are in communication, and the valve ports V3 and V4 of the third control valve 21 are in communication, the battery heat exchange circuit can be disconnected from the heat exchange circuit, allowing the low-temperature radiator LT RAD to dissipate heat from the battery module 20. The path for the low-temperature radiator LT RAD to dissipate heat from the battery module 20 is:

[0064] Battery water pump 60b → battery module 20 → third control valve 21 (V1→V2) → first control valve 11 (V3→V2) → second control valve 12 (V1→V2) → low-temperature radiator LTRAD → overflow tank 50a → second control valve 12 (V3→V4) → third control valve 21 (V3→V4) → battery water pump 60b.

[0065] The battery module 20 also needs to operate at a suitable temperature. In this embodiment, a low-temperature radiator LT RAD can be used to dissipate heat from the battery module 20 so that the battery can operate at a suitable temperature.

[0066] Among them, when the valve port V1 and the valve port V4 of the third control valve 21 are connected, the battery module 20 in the battery heat exchange circuit can be disconnected from the first heat exchange module 22, the second heat exchange module 23 and the motor heat exchange circuit in the heat exchange circuit, so that the battery circuit can be self-circulated and temperature-equalized when the temperature inside the battery is uneven.

[0067] like Figure 3 As shown, the path of the battery circuit self-circulation temperature equalization is:

[0068] Battery water pump 60 b →battery module 20 →third control valve 21 ( V1 →V4 ) →battery water pump 60 b .

[0069] In this embodiment, the third control valve 21 is used to disconnect the battery module 20 in the battery heat exchange circuit from the first heat exchange module 22, the second heat exchange module 23 in the heat exchange circuit, and the motor heat exchange circuit, so that the battery circuit can achieve self-circulation and temperature equalization, thereby improving the flexibility of the vehicle thermal management system and enabling the vehicle thermal management system to utilize energy more flexibly according to actual conditions.

[0070] When the valve ports V1 and V2 of the third control valve 21 are connected, the valve ports V3 and V4 of the first control valve 11 are connected, and the valve ports 1 and 2 of the fourth control valve 42 are connected, the battery heat exchange circuit and the motor heat exchange circuit can be disconnected, and the battery heat exchange circuit and the engine heat exchange circuit can be connected, so that the engine waste heat heats the battery. The path for the engine waste heat to heat the battery is:

[0071] Battery water pump 60b → battery module 20 → third control valve 21 (V1→V2) → first control valve 11 (V3→V4) → first heat exchange module 22 → second heat exchange module 23 → third control valve 21 (V3→V4) → battery water pump 60b.

[0072] Engine module 40 →thermostat 43 →heater water pump 60 d →heater core CH →fourth control valve 42 (1, 2-way) →first heat exchange module 22 →engine water pump 60 c →engine module 40 .

[0073] In this embodiment, the battery heat exchange circuit and the motor heat exchange circuit are disconnected, and the battery heat exchange circuit and the engine heat exchange circuit are connected, so that the engine waste heat can be used to heat the battery.

[0074] Among them, when the valve port 3 and valve port 2 of the fifth control valve 16 are connected, the valve port V1 and valve port V4 of the first control valve 11 are connected, and the valve port 1 and valve port 2 of the fourth control valve 42 are connected, the motor module 10 and the low-temperature radiator 13 in the motor heat exchange circuit can be disconnected, and the motor module 10 in the motor heat exchange circuit can be connected to the first heat exchange module 22 and the second heat exchange module 23 in the heat exchange circuit, and the engine heat exchange circuit can be connected to the first heat exchange module 22 in the heat exchange circuit, so that the engine waste heat can heat the motor. Figure 4 As shown in the figure, the path for the engine waste heat to heat the motor is:

[0075] Motor water pump 60a → fifth control valve 16 (3, 2-way) → motor module 10 → first control valve 11 (V1 → V4) → first heat exchange module 22 → second heat exchange module 23 → motor water pump 60a.

[0076] Engine module 40 →thermostat 43 →heater water pump 60 d →heater core CH →fourth control valve 42 (1, 2-way) →first heat exchange module 22 →engine water pump 60 c →engine module 40 .

[0077] In this embodiment, the motor module 10 and the low-temperature radiator 13 in the motor heat exchange circuit are disconnected, the motor module 10 in the motor heat exchange circuit is connected to the first heat exchange module 22 and the second heat exchange module 23 in the heat exchange circuit, and the engine heat exchange circuit is connected to the first heat exchange module 22 in the heat exchange circuit, so that the engine waste heat can be used to heat the motor.

[0078] In this embodiment, the waste heat from the engine can be used to heat the battery or the motor, thereby saving energy while making the motor or the battery operate at an optimal operating temperature.

[0079] If the battery module 20 does not require heating, the engine can dissipate heat via the engine water pump 60c, engine module 40, thermostat 43, high-temperature radiator HT RAD, and engine water pump 60c. The high-temperature radiator HT RAD can be located adjacent to the outdoor heat exchanger 32 and low-temperature radiator LT RAD in the heat pump heat exchange circuit 30.

[0080] Among them, when the valve port 1 and the valve port 3 of the sixth control valve 34 are connected, and the valve port V1 and the valve port V4 of the third control valve 21 are connected, and the valve port 3 and the valve port 2 of the fifth control valve 16 are connected, and the valve port V1 and the valve port V4 of the first control valve 11 are connected, the motor module 10 in the motor heat exchange circuit can be connected with the first heat exchange module 22 and the second heat exchange module 23 in the heat exchange circuit while making the battery circuit self-circulating and equalizing the temperature, and at the same time, the heat pump heat exchange circuit can be connected with the second heat exchange module 23 in the heat exchange circuit, so that the motor module 10 in the motor heat exchange circuit and the heat pump heat exchange circuit are indirectly connected, so that the heat pump absorbs the waste heat of the motor.

[0081] In this embodiment, by indirectly connecting the motor module 10 in the motor heat exchange circuit and the heat pump heat exchange circuit, the heat pump can absorb not only the heat from the environment but also the heat from the motor, thereby widening the operating ambient temperature of the heat pump.

[0082] Specifically, based on the specific structure of the heat pump heat exchange circuit, when valve ports 1, 2, and 3 of the sixth control valve 34 are all blocked, the heat pump heat exchange circuit can be disconnected from the other circuits, allowing the heat pump to heat the passenger compartment alone. The path for the heat pump to heat the passenger compartment is:

[0083] Compressor 30 →indoor heat exchanger 31 →first electronic expansion valve 35 a →outdoor heat exchanger 32 →first stop valve 36 a →gas-liquid separator 33 →compressor 30 .

[0084] Indoor heat exchanger 31 →heating module 41.

[0085] Among them, the indoor heat exchanger 31 can be arranged adjacent to the heater module 41, so as to adopt the form of a combination of a heat pump and a heater module 41. When the heat pump heats the passenger compartment, if the ambient temperature is low or the heating demand of the passenger compartment is large, the heat pump can be used as the main function and the heater module 41 as the auxiliary function. If the ambient temperature is relatively high or the heating demand of the passenger compartment is small, the energy of the heater module 41 can be used for heating first, with the heat pump as the auxiliary function. Moreover, the heater module 41 can also assist in engine heating. Therefore, the combination of the heat pump and the heater module 41 can make the heating energy efficiency of the vehicle thermal management system higher and more energy-saving.

[0086] Specifically, based on the specific structure of the heat pump heat exchange circuit, when valve ports 1 and 3 of the sixth control valve 34 are connected, valve ports V1 and V2 of the third control valve 21 are connected, valve ports V3 and V4 are connected, and valve ports V3 and V4 of the first control valve 11 are connected, the heat pump heat exchange circuit and the battery heat exchange circuit can be connected, allowing the heat pump to heat the battery. Furthermore, the heat pump can also heat the battery and the passenger compartment. The heat pump heating path for the battery is as follows:

[0087] Compressor 30 → indoor heat exchanger 31 → second stop valve 36b → second electronic expansion valve 35b → second heat exchange module 23 → sixth control valve 34 (1, 2-way) → first electronic expansion valve 35a → outdoor heat exchanger 32 → first stop valve 36a → gas-liquid separator 34 → compressor 30 .

[0088] Battery water pump 60b → battery module 20 → third control valve 21 (V1→V2) → first control valve 11 (V3→V4) → first heat exchange module 22 → second heat exchange module 23 → third control valve 21 (V3→V4) → battery water pump 60b.

[0089] The path for the heat pump to heat the battery and passenger compartment is:

[0090] Compressor 30 →indoor heat exchanger 31 →first electronic expansion valve 35 a →outdoor heat exchanger 32 →first stop valve 36 a →gas-liquid separator 33 →compressor 30 .

[0091] Compressor 30 → indoor heat exchanger 31 → second stop valve 36b → second electronic expansion valve 35b → second heat exchange module 23 → sixth control valve 34 (1, 2-way) → first electronic expansion valve 35a → outdoor heat exchanger 32 → first stop valve 36a → gas-liquid separator 34 → compressor 30 .

[0092] Battery water pump 60b → battery module 20 → third control valve 21 (V1→V2) → first control valve 11 (V3→V4) → first heat exchange module 22 → second heat exchange module 23 → third control valve 21 (V3→V4) → battery water pump 60b.

[0093] In this embodiment, when the vehicle heat pump system is started, the heat pump can be used to heat the passenger compartment and the battery. The use of the heat pump can greatly reduce the energy consumption of the air conditioning heating and battery heating systems, thereby improving the endurance of the entire vehicle.

[0094] Among them, when the valve port 1 and the valve port 3 of the sixth control valve 34 are connected, and the valve port V1 and the valve port V4 of the third control valve 21 are connected, and the valve port 3 and the valve port 2 of the fifth control valve 16 are connected, and the valve port V1 and the valve port V4 of the first control valve 11 are connected, the motor module 10 in the motor heat exchange circuit can be connected with the first heat exchange module 22 and the second heat exchange module 23 in the heat exchange circuit while making the battery circuit self-circulating and equalizing the temperature, and at the same time, the heat pump heat exchange circuit can be connected with the second heat exchange module 23 in the heat exchange circuit, so that the motor module 10 in the motor heat exchange circuit and the heat pump heat exchange circuit are indirectly connected, so that the heat pump absorbs the waste heat of the motor.

[0095] Specifically, such as Figure 5 As shown, the first electronic expansion valve 35a, the third stop valve 36c, and the second electronic expansion valve 35b are controlled to be open, and the second stop valve 36b is controlled to be closed. While the battery circuit is self-circulating and temperature-averaging, the heat pump simultaneously absorbs ambient heat and motor waste heat in the following path:

[0096] Compressor 30 → indoor heat exchanger 31 → first electronic expansion valve 35a → outdoor heat exchanger 32 → third stop valve 36c → second electronic expansion valve 35b → second heat exchange module 23 → sixth control valve 34 (1, 3-way) → gas-liquid separator 33 → compressor 30 .

[0097] Motor water pump 60a → fifth control valve 16 (3, 2-way) → motor module 10 → first control valve 11 (V1 → V4) → first heat exchange module 22 → second heat exchange module 23 → motor water pump 60a.

[0098] Battery water pump 60 b →battery module 20 →third control valve 21 ( V1 →V4 ) →battery water pump 60 b .

[0099] Specifically, such as Figure 6 As shown, the first electronic expansion valve 35a and the third stop valve 36c are controlled to be closed, and the second electronic expansion valve 35b and the second stop valve 36b are controlled to be open. While the battery circuit is self-circulating and temperature-averaging, the heat pump absorbs the waste heat of the motor in the following path:

[0100] Compressor 30 → indoor heat exchanger 31 → second stop valve 36 b → second electronic expansion valve 35 b → second heat exchange module 23 → sixth control valve 34 (1, 3-way) → gas-liquid separator 33 → compressor 30 .

[0101] Motor water pump 60a → fifth control valve 16 (3, 2-way) → motor module 10 → first control valve 11 (V1 → V4) → first heat exchange module 22 → second heat exchange module 23 → motor water pump 60a.

[0102] Battery water pump 60 b →battery module 20 →third control valve 21 ( V1 →V4 ) →battery water pump 60 b .

[0103] In this embodiment, by indirectly connecting the motor module 10 in the motor heat exchange circuit and the heat pump heat exchange circuit, the heat pump can absorb not only the heat from the environment but also the heat from the motor, thereby widening the operating ambient temperature of the heat pump.

[0104] Optionally, the heat pump heat exchange circuit may further include a third electronic expansion valve 35 c and an evaporator 37 , so as to perform refrigeration based on the third electronic expansion valve 35 c and the evaporator 37 .

[0105] In an embodiment of the present invention, the motor heat exchange circuit is connected to the heat exchange circuit through a first control valve, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit through a second control valve; the battery heat exchange circuit is connected to the heat exchange circuit and the first control valve respectively through a third control valve; the heat exchange circuit is provided with a first heat exchange module and a second heat exchange module; the heat pump heat exchange circuit is connected to the second heat exchange module; the engine heat exchange circuit is connected to the heater module and the first heat exchange module respectively through a fourth control valve; the vehicle thermal management system also includes an on-board charger and a transmission oil cooler connected in parallel with the motor module in the motor heat exchange circuit. Therefore, when needed, the first control valve and the second control valve can be used to form a motor heat storage circuit, so that the motor heat storage circuit can store heat and keep warm. When the temperature is appropriate, the first control valve and the third control valve can be used to transfer heat to the heat pump, so that the heat pump can absorb all the energy that can be absorbed, and widen the operating ambient temperature of the heat pump; or the first control valve, the third control valve and the fourth control valve can be used to allow the engine waste heat to heat the battery or the motor, so as to save energy while making the motor or the battery work at the optimal working temperature; or the first control valve and the third control valve can be used to allow the heat pump to heat the battery, so as to reduce the energy consumption of the battery heating system; thus, based on the connection of the motor heat exchange circuit, the battery heat exchange circuit, the heat pump heat exchange circuit and the engine heat exchange circuit, the energy utilization rate in the new energy vehicle is improved, thereby improving the endurance of the entire vehicle and making the product more competitive.

[0106] An embodiment of the present invention further provides a control method for a vehicle thermal management system. The control method is applied to the above-mentioned vehicle thermal management system, including:

[0107] Obtain vehicle parameters and determine the required operating conditions of the vehicle thermal management system based on the vehicle parameters.

[0108] Control the conduction direction of the first control valve, the second control valve, and the third control valve in the vehicle thermal management system to make the vehicle thermal management system operate in the required working conditions.

[0109] Optionally, when the motor heat exchange circuit has no heat dissipation demand (that is, the required operating condition of the vehicle thermal management system determined according to vehicle parameters is motor heat storage), the first control valve is controlled to disconnect the motor module in the motor heat exchange circuit from the heat exchange circuit, and the second control valve is controlled to disconnect the motor module from the low-temperature heat dissipation circuit, forming a motor heat storage circuit to allow the motor to store heat.

[0110] In this embodiment, if the temperature of the motor is within the normal operating temperature range, there is no need to dissipate heat from the motor. The low-temperature radiator 13 can be disconnected from the motor module 10 through the second control valve 12, thereby forming a motor heat storage circuit to provide the motor with heat preservation and heat storage effects, so that when the temperature is appropriate, the heat can be supplied to the battery or heat pump.

[0111] Optionally, when the battery heat exchange circuit has no heat dissipation / heating demand (i.e., the required operating condition of the vehicle thermal management system determined according to vehicle parameters is battery equalization), the third control valve is controlled to disconnect the battery heat exchange circuit from the heat exchange circuit and the first control valve, so that the battery can self-circulate and equalize the temperature.

[0112] In this embodiment, the third control valve is used to disconnect the battery module in the battery heat exchange circuit from the heat exchange circuit and the first control valve, that is, the battery module is disconnected from the heat exchange circuit and the motor heat exchange circuit, so that the battery circuit can achieve self-circulation and temperature equalization, thereby improving the flexibility of the vehicle thermal management system and enabling the vehicle thermal management system to utilize energy more flexibly according to actual conditions.

[0113] Optionally, when the heat pump heat exchange circuit has a heating demand, the battery heat exchange circuit has no heat dissipation / heating demand, and the motor heat exchange circuit has a heat dissipation demand / the motor heat storage circuit has heat storage (that is, the required operating condition of the vehicle thermal management system determined according to vehicle parameters is that the heat pump absorbs motor waste heat while the battery equalizes temperature), the first control valve is controlled to connect the motor module in the motor heat exchange circuit with the heat exchange circuit, and the third control valve is controlled to disconnect the battery heat exchange circuit from the heat exchange circuit and the first control valve, so as to connect the heat pump heat exchange circuit and the motor module in the motor heat exchange circuit through the heat exchange circuit, so that the heat pump absorbs motor waste heat while the battery self-circulates and equalizes temperature, or absorbs ambient heat and motor waste heat at the same time.

[0114] In this embodiment, when the ambient temperature is low and the heat pump system cannot absorb enough heat from the ambient temperature, but the motor has a need for heat dissipation, the motor module 10 in the motor heat exchange circuit and the heat pump heat exchange circuit are indirectly connected, so that the heat pump can not only absorb the heat from the environment, but also absorb the heat from the motor at the same time, thereby widening the operating ambient temperature of the heat pump.

[0115] Optionally, when the heat pump heat exchange circuit has a heating demand and the battery heat exchange circuit has a heating demand, the sixth control valve is controlled to connect the outdoor heat exchanger and the second heat exchange module, and the third control valve and the first control valve are controlled to form a loop of the battery module, the first heat exchange module and the second heat exchange module, so that the heat pump heat exchange circuit and the battery heat exchange circuit are connected through the second heat exchange module, so that the heat pump heats the battery.

[0116] On this basis, the heat pump can also heat the passenger compartment through the path compressor 30 → indoor heat exchanger 31 → first electronic expansion valve 35a → outdoor heat exchanger 32 → first stop valve 36a → gas-liquid separator 33 → compressor 30, and indoor heat exchanger 31 → warm air module 41.

[0117] In this embodiment, when the vehicle heat pump system is started, the heat pump can be used to heat the passenger compartment and the battery. The use of the heat pump can greatly reduce the energy consumption of the air conditioning heating and battery heating systems, thereby improving the endurance of the entire vehicle.

[0118] Moreover, the indoor heat exchanger 31 can be arranged adjacent to the heater module 41, thereby adopting a combination of a heat pump and a heater module 41. When the heat pump heats the passenger compartment, if the ambient temperature is low or the passenger compartment needs to be heated more, the heat pump can be used as the primary function, and the heater module 41 as the auxiliary function. If the ambient temperature is relatively high or the passenger compartment needs to be heated less, the energy of the heater module 41 can be used for heating first, with the heat pump as the auxiliary function. Moreover, the heater module 41 can also assist in engine heating. Therefore, the combination of the heat pump and the heater module 41 can make the heating energy efficiency of the vehicle thermal management system more efficient and more energy-saving.

[0119] Optionally, when the engine heat exchange circuit has a heat dissipation demand and the battery heat exchange circuit has a heating demand (that is, the required operating condition of the vehicle thermal management system determined according to vehicle parameters is that the engine waste heat heats the battery), the third control valve is controlled to connect the battery heat exchange circuit and the heat exchange circuit, and the fourth control valve is controlled to connect the engine heat exchange circuit and the first heat exchange module in the heat exchange circuit, so as to connect the engine heat exchange circuit and the battery heat exchange circuit through the first heat exchange module to utilize the engine waste heat to heat the battery.

[0120] Optionally, when the engine heat exchange circuit has a heat dissipation demand and the motor heat exchange circuit has a heating demand (that is, the required operating condition of the vehicle thermal management system determined according to the vehicle parameters is that the engine waste heat heats the motor), the first control valve is controlled to connect the motor module in the motor heat exchange circuit with the heat exchange circuit, and the fourth control valve is controlled to connect the engine heat exchange circuit with the first heat exchange module in the heat exchange circuit, so that the motor heat exchange circuit and the engine heat exchange circuit are connected through the first heat exchange module, so that the engine waste heat heats the motor.

[0121] In this embodiment, when the vehicle battery needs to be heated, a heat pump can be used for heating, or the engine waste heat can be used for heating. On this basis, the engine waste heat can also be used to heat the motor, thereby improving energy utilization and saving energy while making the motor or battery operate at the optimal operating temperature.

[0122] Optionally, when the on-board charger and the transmission oil cooler have heat dissipation requirements, the fifth control valve, the first control valve and the second control valve are controlled so that the on-board charger and the transmission oil cooler are connected in series and then connected to the low-temperature radiator to form a heat dissipation circuit for the on-board charger and the transmission oil cooler.

[0123] In this embodiment, the transmission oil cooler is connected in series with the onboard charger and then in parallel with the motor module. When the onboard charger and transmission oil cooler require cooling, the heat dissipation module dissipates heat from them. When the onboard charger and transmission oil cooler do not, heat is dissipated only to the motor module, thereby saving water pump energy.

[0124] As another embodiment of the present invention, the present invention may also include a vehicle, including the vehicle thermal management system and control method thereof as in any of the above embodiments, and having the same beneficial effects as the above vehicle thermal management system and control method thereof, which will not be repeated here.

[0125] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0126] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A vehicle thermal management system, characterized in that: include: Motor heat exchange circuit, low-temperature heat dissipation circuit, battery heat exchange circuit, heat exchange circuit, heat pump heat exchange circuit and engine heat exchange circuit; The motor heat exchange circuit is connected to the heat exchange circuit via a first control valve, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit via a second control valve; the battery heat exchange circuit is connected to the heat exchange circuit and the first control valve respectively via a third control valve; the heat exchange circuit is provided with a first heat exchange module and a second heat exchange module; the heat pump heat exchange circuit is connected to the second heat exchange module; the engine heat exchange circuit is connected to the heater module and the first heat exchange module respectively via a fourth control valve; The vehicle thermal management system further includes an on-board charger and a transmission oil cooler connected in parallel with the motor module in the motor heat exchange circuit; The engine heat exchange circuit includes an engine module and a high-temperature radiator; The engine heat exchange circuit is connected to the heater module and the first heat exchange module respectively through a fourth control valve, including: One end of the engine module is connected to one end of the high-temperature radiator, and the other end of the high-temperature radiator is connected to the other end of the engine module; the other end of the engine module is also connected to one end of the heater module through the third valve port and the first valve port of the fourth control valve, and the other end of the heater module is connected to one end of the engine module; the other end of the engine module is also connected to the third end of the first heat exchange module through the third valve port and the second valve port of the fourth control valve, and the fourth end of the first heat exchange module is connected between the third valve port of the third control valve and the other end of the engine module.

2. The vehicle thermal management system according to claim 1, characterized in that: The motor heat exchange circuit includes a motor module, and the low-temperature heat dissipation circuit includes a low-temperature radiator; The motor heat exchange circuit is connected to the heat exchange circuit through a first control valve, and the motor heat exchange circuit is connected to the low-temperature heat dissipation circuit through a second control valve, including: One end of the motor module is connected to the first end of the first heat exchange module through the first valve port and the fourth valve port of the first control valve, the second end of the first heat exchange module is connected to the first end of the second heat exchange module, and the second end of the second heat exchange module is connected to the other end of the motor module; One end of the motor module is also connected to the first valve port of the second control valve through the first valve port and the second valve port of the first control valve, the second valve port of the second control valve is connected to one end of the low-temperature radiator, the other end of the low-temperature radiator is connected to the third valve port of the second control valve, and the fourth valve port of the second control valve is connected to the other end of the motor module.

3. The vehicle thermal management system according to claim 2, characterized in that: The vehicle thermal management system also includes a fifth control valve; The vehicle thermal management system further includes an onboard charger and a transmission oil cooler connected in parallel with the motor module in the motor heat exchange circuit, including: The first valve port of the fifth control valve is connected to one end of the on-board charger, the other end of the on-board charger is connected to one end of the transmission oil cooler, the other end of the transmission oil cooler is connected to one end of the motor module, the second valve port of the fifth control valve is connected to the other end of the motor module, and the third valve port of the fifth control valve is connected to the fourth valve port of the second control valve.

4. The vehicle thermal management system according to claim 2, characterized in that: The battery heat exchange circuit includes a battery module; The battery heat exchange circuit is connected to the heat exchange circuit and the first control valve respectively through a third control valve, including: One end of the battery module is connected to the first valve port of the third control valve, the second valve port of the third control valve is connected to the third valve port of the first control valve, the third valve port of the third control valve is connected to the second end of the second heat exchange module, and the fourth valve port of the third control valve is connected to the other end of the battery module.

5. The vehicle thermal management system according to claim 1, characterized in that: The heat pump heat exchange circuit includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a gas-liquid separator; The heat pump heat exchange circuit is connected to the second heat exchange module, and includes: One end of the compressor is connected to one end of the indoor heat exchanger, the other end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger via a first electronic expansion valve, the other end of the outdoor heat exchanger is connected to one end of the gas-liquid separator via a first stop valve, and the other end of the gas-liquid separator is connected to the other end of the compressor; The other end of the indoor heat exchanger is also connected to the third end of the second heat exchange module through a second stop valve and a second electronic expansion valve, the fourth end of the second heat exchange module is connected to the first valve port of the sixth control valve, and the third valve port of the sixth control valve is connected to one end of the gas-liquid separator; the second valve port of the sixth control valve is connected between the first electronic expansion valve and the other end of the indoor heat exchanger; the other end of the outdoor heat exchanger is also connected to one end of the third stop valve, and the other end of the third stop valve is connected between the second stop valve and the second electronic expansion valve in one path, and is connected to one end of the gas-liquid separator through the third electronic expansion valve and the evaporator in the other path.

6. A control method for a vehicle thermal management system, applied to the vehicle thermal management system according to any one of claims 1 to 5, characterized in that: The control method includes: Acquiring vehicle parameters, and determining a required operating condition of the vehicle thermal management system based on the vehicle parameters; Control the conduction directions of the first control valve, the second control valve, the third control valve, and the fourth control valve in the vehicle thermal management system so that the vehicle thermal management system operates in the required working conditions.

7. The control method of the vehicle thermal management system according to claim 6, characterized in that: Controlling the conduction direction of the first control valve, the second control valve, the third control valve, and the fourth control valve in the vehicle thermal management system so that the vehicle thermal management system operates in the desired operating condition includes: If the required operating condition is motor heat storage, controlling the first control valve to disconnect the motor module in the motor heat exchange circuit from the heat exchange circuit, and controlling the second control valve to disconnect the motor module from the low-temperature heat dissipation circuit, so that the motor can store heat; If the required operating condition is battery temperature equalization, the third control valve is controlled to disconnect the battery heat exchange circuit from the heat exchange circuit and the first control valve, so that the battery self-circulates and equalizes temperature.

8. The control method of the vehicle thermal management system according to claim 6, characterized in that: Controlling the conduction direction of the first control valve, the second control valve, and the third control valve in the vehicle thermal management system so that the vehicle thermal management system operates in the desired operating condition includes: If the required operating condition is that the heat pump absorbs motor waste heat while the battery equalizes temperature, the first control valve is controlled to connect the motor module in the motor heat exchange circuit to the heat exchange circuit, and the third control valve is controlled to disconnect the battery heat exchange circuit from the heat exchange circuit and the first control valve, so that the heat pump heat exchange circuit is connected to the motor module in the motor heat exchange circuit through the heat exchange circuit, so that the heat pump absorbs motor waste heat while the battery self-circulates and equalizes temperature; If the desired operating condition is that the engine waste heat heats the battery, the third control valve is controlled to connect the battery heat exchange circuit with the heat exchange circuit, and the fourth control valve is controlled to connect the engine heat exchange circuit with the first heat exchange module in the heat exchange circuit, so that the battery heat exchange circuit is connected to the engine heat exchange circuit through the first heat exchange module, so that the engine waste heat heats the battery; If the required working condition is that the engine waste heat heats the motor, the first control valve is controlled to connect the motor module in the motor heat exchange circuit with the heat exchange circuit, and the fourth control valve is controlled to connect the engine heat exchange circuit with the first heat exchange module in the heat exchange circuit, so that the motor heat exchange circuit and the engine heat exchange circuit are connected through the first heat exchange module, so that the engine waste heat heats the motor.

9. A vehicle, characterized in that: It comprises an electronic device and a vehicle thermal management system as described in any one of claims 1 to 5, wherein the electronic device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the method as described in any one of claims 6 to 8 are implemented.

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