Vehicle thermal management system, vehicle thermal management control method and vehicle

Abstract

The present invention provides a vehicle thermal management system, a vehicle thermal management control method, and a vehicle. The system includes: a motor heat exchange circuit connected to a heat exchange circuit via a first control valve, which is then connected to a low-temperature heat dissipation circuit via a second control valve; a battery heat exchange circuit connected to the heat exchange circuit and the first control valve, respectively, via a third control valve; a first heat exchange module and a second heat exchange module connected in series to the heat exchange circuit; a heat pump heat exchange circuit connected to the second heat exchange module; and an engine heat exchange circuit connected to a heater module and the first heat exchange module, respectively, via a fourth control valve. A first heat exchange branch is connected in parallel to the motor module in the motor heat exchange circuit, and a transmission oil cooler is connected in series to the first heat exchange branch; a second heat exchange branch is connected in parallel to the battery module in the battery heat exchange circuit, and an onboard charger is connected in series to the second heat exchange branch. The present invention can improve energy utilization 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, a whole vehicle thermal management control method, and a vehicle. 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] Embodiments of the present invention provide a whole vehicle thermal management system, a whole vehicle thermal management control method, and a vehicle, so as to improve the energy utilization rate in new energy vehicles.

[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; 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; a first heat exchange module and a second heat exchange module are connected in series to the heat exchange circuit; the heat pump heat exchange circuit is connected to the second heat exchange module; and the engine heat exchange circuit is connected to the heater module and the first heat exchange module respectively via a fourth control valve;

[0006] The vehicle thermal management system also includes a first heat exchange branch, which is connected in parallel with the motor module in the motor heat exchange circuit, and a transmission oil cooler is connected in series to the first heat exchange branch.

[0007] Optionally, 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:

[0008] One end of the motor module is connected to the first end of the first control valve, the second end of the first control valve is connected to the first end of the second control valve, the second end 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 end of the second control valve, the fourth end of the second control valve is connected to the other end of the motor module, and the fourth end of the first control valve is connected to the other end of the motor module through the first and second ends of the first heat exchange module and the first and second ends of the second heat exchange module in sequence.

[0009] Optionally, 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:

[0010] One end of the battery module is connected to the first end of the third control valve, the second end of the third control valve is connected to the third end of the first control valve, the second end of the second heat exchange module is connected to the third end of the third control valve, and the fourth end of the third control valve is connected to the other end of the battery module.

[0011] Optionally, 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:

[0012] 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; one end of the engine module is also connected to the first end of the fourth control valve, the second end of the fourth control valve is connected to the other end of the engine module, the third end of the fourth control valve is connected to one end of the heater module, the other end of the heater module is connected to the first end of the fifth control valve, the second end of the fifth control valve is connected to the third end of the first heat exchange module, the third end of the fifth control valve is connected to the fourth end of the fourth control valve, and the fourth end of the first heat exchange module is connected to the fourth end of the fourth control valve.

[0013] Optionally, the heat pump heat exchange circuit includes a compressor, an indoor heat exchanger, and an outdoor heat exchanger; the heat pump heat exchange circuit is connected to the second heat exchange module, including:

[0014] 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 through a first electronic expansion valve, the other end of the outdoor heat exchanger is connected to one end of the gas-liquid separator through a first stop valve, and the other end of the gas-liquid separator is connected to the other end of the compressor;

[0015] The other end of the indoor heat exchanger is also connected to the third end of the second heat exchange module through the second stop valve and the second electronic expansion valve, the fourth end of the second heat exchange module is connected to the first end of the sixth control valve, and the third end of the sixth control valve is connected to one end of the gas-liquid separator; the second end 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 way, and is connected to one end of the gas-liquid separator through the third electronic expansion valve and the evaporator in the other way.

[0016] Optionally, the first heat exchange branch is connected in parallel with the motor module in the motor heat exchange circuit, including:

[0017] The fourth end of the second control valve is connected to the first end of the seventh control valve, the second end of the seventh control valve is connected to one end of the transmission oil cooler, the third end of the seventh control valve is connected to the other end of the motor module, and the other end of the transmission oil cooler is connected to the first end of the first control valve.

[0018] Optionally, the vehicle thermal management system further includes a second heat exchange branch, the second heat exchange branch is connected in parallel with the battery module in the battery heat exchange circuit, and the second heat exchange branch is connected in series with an on-board charger.

[0019] In a second aspect, an embodiment of the present invention provides a vehicle thermal management control method, which is used to control the vehicle thermal management system according to the first aspect above;

[0020] The method includes:

[0021] Obtain vehicle parameters and determine the required operating conditions of the vehicle thermal management system based on the vehicle parameters;

[0022] Control 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 to make the vehicle thermal management system operate in the required working conditions.

[0023] Optionally, 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 a desired operating condition includes:

[0024] If the required working condition is that the motor module has a heat dissipation requirement, the motor heat exchange circuit and the low-temperature heat dissipation circuit are connected by controlling the second control valve, so as to dissipate heat for the motor module in the motor heat exchange circuit through the low-temperature heat dissipation circuit;

[0025] If the required operating condition is that the battery module has a heat dissipation requirement, the battery heat exchange circuit and the low-temperature heat dissipation circuit are connected by controlling the first control valve, the second control valve, and the third control valve to dissipate heat for the battery module in the battery heat exchange circuit through the low-temperature heat dissipation circuit;

[0026] If the required working condition is motor heat storage, the motor heat exchange circuit is disconnected from other circuits by controlling the first control valve and the second control valve, and the motor heat exchange circuit performs self-circulation heat storage;

[0027] If the required working condition is that the heat pump absorbs the motor waste heat or heats the motor, the motor heat exchange circuit is connected to the heat pump heat exchange circuit through the heat exchange circuit by controlling the first control valve;

[0028] If the required operating condition is that the heat pump absorbs the battery waste heat or heats the battery, the battery heat exchange circuit is connected to the heat pump heat exchange circuit through the heat exchange circuit by controlling the third control valve;

[0029] If the required working condition is to heat the motor with the engine waste heat, the first control valve and the fourth control valve are controlled to connect the engine heat exchange circuit to the motor heat exchange circuit through the heat exchange circuit.

[0030] In a third aspect, an embodiment of the present invention provides a vehicle comprising an electronic device and a vehicle thermal management system as described in the first aspect above. The electronic device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the vehicle thermal management control method as described in the second aspect above are implemented.

[0031] 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 first heat exchange module and the second heat exchange module are connected in series on the heat exchange circuit; the heat pump heat exchange circuit is connected to the first heat exchange module; and the engine heat exchange circuit is connected to the heater module and the second heat exchange module respectively through a fourth control valve. Furthermore, when needed, the first and second control valves can be used to form a motor heat storage circuit for heat storage. When the temperature is appropriate, the first control valve and the second heat exchange module can be used to transfer heat to the heat pump, allowing the heat pump to absorb all available energy and widening the operating temperature range of the heat pump. Alternatively, the first, third, fourth, and fifth control valves, along with the first heat exchange module, can be used to transfer engine waste heat to the battery or motor, thereby saving energy and allowing the motor or battery to operate at an optimal operating temperature. Alternatively, the first, third, and sixth control valves can be used to transfer heat to the battery, thereby reducing energy consumption of the battery heating system. Alternatively, the fourth control valve can be used to form an engine heat storage circuit for heat storage, which can be transferred to the heater and to the heat pump, battery, and motor via the first and second heat exchange modules, thereby effectively utilizing engine waste heat. Furthermore, the transmission oil cooler is connected in parallel with the motor module, allowing the transmission oil cooler to be heated or cooled when needed. If not, only the motor module can be connected, saving energy consumption of the water pump. The embodiments of the present invention can improve the energy utilization rate in new energy vehicles, thereby improving the endurance of the entire vehicle and making the product more competitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 Schematic diagram of the structure of a vehicle thermal management system provided by an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the heat storage path of the motor heat storage circuit provided by an embodiment of the present invention;

[0035] 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;

[0036] Figure 4 Schematic diagram of a path for heating a motor with engine waste heat according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the path of the engine circuit self-circulation heat storage provided by an embodiment of the present invention;

[0038] Figure 6 This 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;

[0039] Figure 7 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

[0040] 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.

[0041] 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.

[0042] 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 described 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 12 (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 (V3-V2); 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, and the outdoor heat exchanger 32; and the engine heat exchange circuit is a circuit formed by connecting the engine module 40 and the high-temperature radiator 45. 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 first heat exchange module 22 and the second heat exchange module 23 are connected in series on the heat exchange circuit; 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 31 and the first heat exchange module 22 respectively through the fourth control valve 44.

[0043] The vehicle thermal management system further includes a first heat exchange branch, which is connected in parallel with the motor module 10 in the motor heat exchange circuit, and the transmission oil cooler 15 of the transmission 17 is connected in series to the first heat exchange branch.

[0044] The vehicle thermal management system further includes a second heat exchange branch, which is connected in parallel with the battery module 20 in the battery heat exchange loop, and the on-board charger 14 is connected in series to the second heat exchange branch.

[0045] In a more detailed example:

[0046] 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 V1 of the first control valve 11, the second end V2 of the first control valve 11 is connected to the first end V1 of the second control valve 12, the second end 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 end V3 of the second control valve 12, and the fourth end V4 of the second control valve 12 is connected to the other end of the motor module 10. The fourth end V4 of the first control valve 11 is connected to the other end of the motor module 10 via the first and second ends of the first heat exchange module 22 and the first and second ends of the second heat exchange module 23, in sequence.

[0047] The battery heat exchange circuit includes a battery module 20. One end of the battery module 20 is connected to the first end V1 of the third control valve 21. The second end V2 of the third control valve 21 is connected to the third end V3 of the first control valve 11. The second end of the second heat exchange module 23 is connected to the third end V3 of the third control valve 21. The fourth end V4 of the third control valve 21 is connected to the other end of the battery module 20.

[0048] The engine heat exchange circuit includes an engine module 40 and a high-temperature radiator 45. One end of the engine module 40 is connected to one end of the high-temperature radiator 45, and the other end of the high-temperature radiator 45 is connected to the other end of the engine module 40. One end of the engine module 40 is also connected to the first end V1 of the fourth control valve 44, the second end V2 of the fourth control valve 44 is connected to the other end of the engine module 40, the third end V3 of the fourth control valve 44 is connected to one end of the heater module 41, the other end of the heater module 41 is connected to the first end of the fifth control valve 42, the second end of the fifth control valve 42 is connected to the third end of the first heat exchange module 22, the third end of the fifth control valve 42 is connected to the fourth end V4 of the fourth control valve 44, and the fourth end of the first heat exchange module 22 is connected to the fourth end V4 of the fourth control valve 44.

[0049] Preferably, one end of the engine module 40 is connected to one end of the high-temperature radiator 45 and the first end of the fourth control valve 44 through a thermostat 43. The thermostat 43 is used to adjust the flow direction of the cooling water according to the temperature of the cooling water, automatically adjust the amount of water entering the high-temperature radiator 13 according to the temperature of the cooling water, change the circulation range of the water, adjust the heat dissipation capacity of the cooling system, and ensure that the engine operates within a suitable temperature range.

[0050] The heat pump heat exchange circuit includes a compressor 30, an indoor heat exchanger 31, and an outdoor heat exchanger 32. One end of the compressor 30 is connected to one end of the indoor heat exchanger 31, and 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 a 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 third end of the second heat exchange module 23 through a second stop valve 36b and a second electronic expansion valve 35b, and the fourth end of the second heat exchange module 23 is connected to the second heat exchange module 23. It is connected to the first end of the sixth control valve 34, and the third end of the sixth control valve 34 is connected to one end of the gas-liquid separator 33; the second end 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 on one path, and is connected to one end of the gas-liquid separator 33 through the third electronic expansion valve 35c and the evaporator 37 on the other path.

[0051] In this embodiment, after absorbing external heat in the outdoor heat exchanger 32 , the cooling water may flow back to the compressor 30 , or release heat through the evaporator 37 , or flow into the second heat exchange module 23 .

[0052] Furthermore, the fourth end V4 of the second control valve 12 is connected to the first end of the seventh control valve 16, the second end of the seventh control valve 16 is connected to one end of the transmission oil cooler 15, the third end of the seventh control valve 16 is connected to the other end of the motor module 10, and the other end of the transmission oil cooler 15 is connected to the first end V1 of the first control valve 11. The fourth end V4 of the third control valve 21 is connected to one end of the onboard charger 14, and the other end of the onboard charger 14 is connected to the first end V1 of the third control valve 21.

[0053] like 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, battery heat exchange circuit and engine heat exchange circuit to transfer heat through the flow of coolant. The three heat exchange circuits are all connected to an electronic water pump (i.e. Figure 1The motor water pump 60a, battery water pump 60b, and engine water pump 60c in the heat exchange circuit provide the flow of coolant. Each of the three heat exchange circuits is also connected to a one-way throttle valve 70a, 70b, and 70c to control the flow and direction of the coolant.

[0054] Illustratively, the first control valve 11 , the second control valve 12 , the third control valve 21 , and the fourth control valve 44 are all four-way solenoid valves, and the fifth control valve 42 and the sixth control valve 34 are all three-way solenoid valves.

[0055] 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, and the valve ports V3 and V4 of the second control valve 12 are connected, the low-temperature radiator 13 (LTRAD) dissipates heat from the motor module 10. The path for the low-temperature radiator 13 to dissipate heat from the motor module 10 is:

[0056] Motor water pump 60a → seventh control valve 16 (1, 3-way) → motor module 10 → first control valve 11 (V1→V2) → second control valve 12 (V1→V2) → low-temperature radiator 13 → overflow tank 50a → second control valve 12 (V3→V4) → motor water pump 60a.

[0057] At the same time, if Figure 1 As shown, the transmission oil cooler 15 is connected in parallel with the motor module 10. When the transmission oil cooler needs to be heated or cooled, port 2 of the seventh control valve 16 is controlled to be open, allowing coolant to flow through the transmission oil cooler 15 for heating or cooling. When heating or cooling is not required, port 2 of the seventh control valve 16 is closed, allowing coolant to flow only through the motor module 10, saving water pump energy.

[0058] 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 13 can be used to dissipate heat from the motor module 10 so that the motor can operate at a suitable temperature.

[0059] 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 through the motor heat storage circuit. Figure 2 As shown in the figure, the heat storage path of the motor heat storage circuit is:

[0060] Motor water pump 60a → seventh control valve 16 (1, 3-way) → motor module 10 → first control valve 11 (V1 → V2) → second control valve 12 (V1 → V4) → motor water pump 60a.

[0061] 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 second control valve 12 disconnects the low-temperature radiator 13 from the motor module 10 to form a motor heat storage circuit, providing the motor with heat preservation and heat storage functions, thereby providing heat to the battery or heat pump when the temperature is appropriate.

[0062] 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 motor module 10 in the battery heat exchange circuit and the motor heat exchange circuit can be disconnected, allowing the low-temperature radiator 13 to dissipate heat from the battery module 20. The path for the low-temperature radiator 13 to dissipate heat from the battery module 20 is:

[0063] 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 13 → overflow tank 50a → second control valve 12 (V3→V4) → third control valve 21 (V3→V4) → battery water pump 60b.

[0064] The battery module 20 also needs to operate at a suitable temperature. In this embodiment, the low-temperature radiator 13 can be used to dissipate heat from the battery module 20 so that the battery can operate at a suitable temperature.

[0065] When the valve ports V1 and 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, thereby achieving self-circulation and temperature equalization of the battery circuit and temperature control of the on-board charger 14 when the internal temperature of the battery is uneven. Figure 3 As shown, the path is:

[0066] Battery water pump 60 b →battery module 20 →third control valve 21 ( V1 →V4 ) →battery water pump 60 b .

[0067] Battery water pump 60 b →on-vehicle charger 14 →third control valve 21 ( V1 →V4 ) →battery water pump 60 b .

[0068] In this embodiment, the third control valve 21 disconnects the battery module 20 from the first heat exchange module 22, the second heat exchange module 23, and the motor heat exchange circuit in the battery heat exchange circuit, enabling self-circulation and temperature equalization in the battery circuit. This improves the flexibility of the vehicle's thermal management system and enables it to more flexibly utilize energy based on actual conditions. Furthermore, because the onboard charger 14 is connected in parallel with the battery module 20, the temperature of the onboard charger 14 and the battery module 20 remains consistent regardless of whether the battery module 20 is being heated, cooled, or self-circulated, ensuring that the onboard charger 14 operates at an appropriate temperature.

[0069] 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, the valve ports V1 and V3 of the fourth control valve 44 are connected, the valve ports V2 and V4 of the fourth control valve 44 are connected, and the valve ports 1 and 2 of the fifth 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:

[0070] 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.

[0071] Engine module 40 → thermostat 43 → fourth control valve 44 (V1→V3) → heater water pump 60d → heater module 41 → fifth control valve 42 (1, 2-way) → first heat exchange module 22 → fourth control valve 44 (V4→V2) → engine water pump 60c → engine module 40.

[0072] 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.

[0073] Among them, when the valve port 1 and valve port 3 of the seventh control valve 16 are connected, the valve port V1 and valve port V4 of the first control valve 11 are connected, the valve port V1 and valve port V3 of the fourth control valve 44 are connected, the valve port V2 and valve port V4 are connected, and the valve port 1 and valve port 2 of the fifth 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 battery heat exchange circuit, and the engine heat exchange circuit can be connected to the first heat exchange module 22 in the battery heat exchange circuit, so that the engine waste heat heats the motor. Figure 4 As shown in the figure, the path of the engine waste heat heating motor is:

[0074] Motor water pump 60a → seventh control valve 16 (1, 3-way) → motor module 10 → first control valve 11 (V1 → V4) → first heat exchange module 22 → second heat exchange module 23 → motor water pump 60a.

[0075] Engine module 40 → thermostat 43 → fourth control valve 44 (V1→V3) → heater water pump 60d → heater module 41 → fifth control valve 42 (1, 2-way) → first heat exchange module 22 → fourth control valve 44 (V4→V2) → engine water pump 60c → engine module 40.

[0076] In this embodiment, the motor module 10 in the motor heat exchange circuit is disconnected from the low-temperature radiator 13, and 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 battery heat exchange circuit. Furthermore, the engine heat exchange circuit is connected to the first heat exchange module 22 in the battery heat exchange circuit. This allows the motor to be heated using engine waste heat. Using engine waste heat to heat the battery or motor can save energy while keeping the motor or battery operating at its optimal operating temperature.

[0077] If the engine needs to dissipate heat, it can be dissipated through the engine water pump 60c → engine module 40 → thermostat 43 → high-temperature radiator 45 → engine water pump 60c. The high-temperature radiator 45 can be set adjacent to the outdoor heat exchanger 32 and the low-temperature radiator 13 in the heat pump heat exchange circuit 30. When the engine does not need to dissipate heat, the valve ports V1 and V2 of the fourth control valve 44 can be controlled to be conductive, forming an engine heat storage circuit for heat storage, so that the heater module 41, battery module 20, and motor module 10 can be heated when they need to be heated, such as Figure 5 As shown, the heat storage path is the engine water pump 60 c → the engine module 40 → the thermostat 43 → the fourth control valve 44 ( V1 → V2 ) → the engine water pump 60 c .

[0078] When valve ports 1, 2, and 3 of the sixth control valve 34 are all blocked, the heat pump heat exchange circuit is disconnected from other circuits, and the heat pump heats the passenger compartment alone. The path for the heat pump to heat the passenger compartment is:

[0079] 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 .

[0080] Indoor heat exchanger 31 →heating module 41.

[0081] In this embodiment, the indoor heat exchanger 31 can be arranged adjacent to the heater module 41 in the engine heat exchange circuit, 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 heating demand of the passenger compartment is large, the heat pump can be used as the main method and the heater module 41 can be used as the auxiliary method. 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 method. The heater module 41 can also assist in engine heating. 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.

[0082] When valve ports 1 and 2 of the sixth control valve 34 are connected, and valve ports V1 and V2, valve ports V3 and V4 of the third control valve 21 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, when valve ports 1 and 2 of the sixth control valve 34 are connected, and valve ports V1 and V2, valve ports V3 and V4 of the third control valve 21 are connected, and valve ports V3 and V4 of the first control valve 11 are connected, the heat pump can also heat the battery and the passenger compartment.

[0083] Among them, the path of the heat pump heating battery is:

[0084] 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 33 → compressor 30 .

[0085] 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.

[0086] The path for the heat pump to heat the battery and passenger compartment is:

[0087] 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 .

[0088] 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 33 → compressor 30 .

[0089] 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.

[0090] 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.

[0091] 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 1 and the valve port 3 of the seventh 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 to the second heat exchange module 23 in the battery heat exchange circuit while the battery circuit is self-circulated and temperature-averaged, and the heat pump heat exchange circuit can be connected to the second heat exchange module 23 in the battery 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.

[0092] like Figure 6 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. The path is:

[0093] 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 .

[0094] Motor water pump 60a → seventh control valve 16 (1, 3-way) → motor module 10 → first control valve 11 (V1 → V4) → first heat exchange module 22 → second heat exchange module 23 → motor water pump 60a.

[0095] Battery water pump 60 b →battery module 20 →third control valve 21 ( V1 →V4 ) →battery water pump 60 b .

[0096] like Figure 7 As shown, the first electronic expansion valve 35a and the first stop valve 36a 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:

[0097] 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 .

[0098] Motor water pump 60a → seventh control valve 16 (1, 3-way) → motor module 10 → first control valve 11 (V1 → V4) → first heat exchange module 22 → second heat exchange module 23 → motor water pump 60a.

[0099] Battery water pump 60 b →battery module 20 →third control valve 21 ( V1 →V4 ) →battery water pump 60 b .

[0100] 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.

[0101] 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 connected in series with a first heat exchange module and a second heat exchange module; the heat pump heat exchange circuit is connected to the first heat exchange module; and the engine heat exchange circuit is connected to the heater module and the second heat exchange module respectively through a fourth control valve. Furthermore, when necessary, the first control valve and the second control valve can be used to form a motor heat storage circuit for heat storage, and when the temperature is appropriate, the first control valve and the second heat exchange module 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 environment temperature of the heat pump; or the first control valve, the third control valve, the fourth control valve, the fifth control valve and the first heat exchange module can be used to heat the battery or the motor with the waste heat of the engine, so as to save energy while making the motor or the battery work at the optimal working temperature; or the first control valve, the third control valve and the sixth control valve can be used to make the heat pump heat the battery. To reduce the energy consumption of the battery heating system; or use the fourth control valve to form an engine heat storage circuit for heat storage, which can be transferred to the warm air and to the heat pump, battery and motor through the first heat exchange module and the second heat exchange module, so as to realize the effective utilization of the engine waste heat; at the same time, the transmission oil cooler is connected in parallel with the motor module, so that the transmission oil cooler can be heated or cooled when needed. If it is not needed, only the motor module can be connected, saving the energy consumption of the water pump; the on-board charger is connected in parallel with the battery module, and can be heated or cooled together with the battery module, so that the on-board charger and the battery module can operate at a suitable temperature during charging. The embodiments of the present invention can improve the utilization rate of energy in new energy vehicles, thereby improving the endurance of the entire vehicle and making the product more competitive.

[0102] An embodiment of the present invention provides a vehicle thermal management control method, which is used to control the vehicle thermal management system in the above embodiment.

[0103] The method includes:

[0104] Obtain vehicle parameters and determine the required operating conditions of the vehicle thermal management system based on the vehicle parameters;

[0105] Control 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 to make the vehicle thermal management system operate in the required working conditions.

[0106] As a possible implementation method, 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 a desired operating condition includes:

[0107] If the required working condition is that the motor module has a heat dissipation requirement, the motor heat exchange circuit and the low-temperature heat dissipation circuit are connected by controlling the second control valve, so as to dissipate heat for the motor module in the motor heat exchange circuit through the low-temperature heat dissipation circuit;

[0108] If the required operating condition is that the battery module has a heat dissipation requirement, the battery heat exchange circuit and the low-temperature heat dissipation circuit are connected by controlling the first control valve, the second control valve, and the third control valve to dissipate heat for the battery module in the battery heat exchange circuit through the low-temperature heat dissipation circuit;

[0109] If the required working condition is motor heat storage, the motor heat exchange circuit is disconnected from other circuits by controlling the first control valve and the second control valve, and the motor heat exchange circuit performs self-circulation heat storage;

[0110] If the required working condition is that the heat pump absorbs the motor waste heat or heats the motor, the motor heat exchange circuit is connected to the heat pump heat exchange circuit through the heat exchange circuit by controlling the first control valve;

[0111] If the required operating condition is that the heat pump absorbs the battery waste heat or heats the battery, the battery heat exchange circuit is connected to the heat pump heat exchange circuit through the heat exchange circuit by controlling the third control valve;

[0112] If the required working condition is to heat the motor with the engine waste heat, the first control valve and the fourth control valve are controlled to connect the engine heat exchange circuit to the motor heat exchange circuit through the heat exchange circuit.

[0113] The specific control process can be found in the description of the above system embodiment and will not be repeated here.

[0114] An embodiment of the present invention also provides a vehicle, including an electronic device and a vehicle thermal management system as in the above-mentioned system embodiment. The electronic device includes a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, the steps of the vehicle thermal management control method as described above are implemented.

[0115] 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.

[0116] 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, engine heat exchange circuit; 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 connected in series 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; and 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 further includes a first heat exchange branch, the first heat exchange branch being connected in parallel with the motor module in the motor heat exchange circuit, and a transmission oil cooler being connected in series to the first heat exchange branch; 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, and includes: 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; One end of the engine module is also connected to the first end of the fourth control valve, the second end of the fourth control valve is connected to the other end of the engine module, the third end of the fourth control valve is connected to one end of the heater module, the other end of the heater module is connected to the first end of the fifth control valve, the second end of the fifth control valve is connected to the third end of the first heat exchange module, the third end of the fifth control valve is connected to the fourth end of the fourth control valve, and the fourth end of the first heat exchange module is connected to the fourth end of the fourth control valve.

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 control valve, the second end of the first control valve is connected to the first end of the second control valve, the second end 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 end of the second control valve, the fourth end of the second control valve is connected to the other end of the motor module, and the fourth end of the first control valve is connected to the other end of the motor module through the first and second ends of the first heat exchange module and the first and second ends of the second heat exchange module in sequence.

3. 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 the third control valve; comprising: One end of the battery module is connected to the first end of the third control valve, the second end of the third control valve is connected to the third end of the first control valve, the second end of the second heat exchange module is connected to the third end of the third control valve, and the fourth end of the third control valve is connected to the other end of the battery module.

4. 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, and an outdoor heat exchanger; The heat pump heat exchange circuit is connected to the second heat exchange module, including: 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 through a first electronic expansion valve, the other end of the outdoor heat exchanger is connected to one end of the gas-liquid separator through 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 the second stop valve and the second electronic expansion valve, the fourth end of the second heat exchange module is connected to the first end of the sixth control valve, and the third end of the sixth control valve is connected to one end of the gas-liquid separator; the second end 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 way, and is connected to one end of the gas-liquid separator through the third electronic expansion valve and the evaporator in the other way.

5. The vehicle thermal management system according to claim 3, characterized in that: The first heat exchange branch is connected in parallel with the motor module in the motor heat exchange circuit, and includes: The fourth end of the second control valve is connected to the first end of the seventh control valve, the second end of the seventh control valve is connected to one end of the transmission oil cooler, the third end of the seventh control valve is connected to the other end of the motor module, and the other end of the transmission oil cooler is connected to the first end of the first control valve.

6. The vehicle thermal management system according to claim 1, characterized in that: The vehicle thermal management system further includes a second heat exchange branch, which is connected in parallel with the battery module in the battery heat exchange circuit, and an on-board charger is connected in series to the second heat exchange branch.

7. A vehicle thermal management control method, characterized in that: The method is used to control the vehicle thermal management system according to any one of claims 1 to 6; The method comprises: 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.

8. The vehicle thermal management control method according to claim 7, 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 working condition includes: If the required working condition is that the motor module has a heat dissipation requirement, the motor heat exchange circuit and the low-temperature heat dissipation circuit are connected by controlling the second control valve, so as to dissipate heat for the motor module in the motor heat exchange circuit through the low-temperature heat dissipation circuit; If the required operating condition is that the battery module has a heat dissipation requirement, the battery heat exchange circuit and the low-temperature heat dissipation circuit are connected by controlling the first control valve, the second control valve, and the third control valve to dissipate heat for the battery module in the battery heat exchange circuit through the low-temperature heat dissipation circuit; If the required working condition is motor heat storage, the motor heat exchange circuit is disconnected from other circuits by controlling the first control valve and the second control valve, and the motor heat exchange circuit performs self-circulation heat storage; If the required working condition is that the heat pump absorbs the motor waste heat or heats the motor, the motor heat exchange circuit is connected to the heat pump heat exchange circuit through the heat exchange circuit by controlling the first control valve; If the required operating condition is that the heat pump absorbs the battery waste heat or heats the battery, the battery heat exchange circuit is connected to the heat pump heat exchange circuit through the heat exchange circuit by controlling the third control valve; If the required working condition is to heat the motor with the engine waste heat, the first control valve and the fourth control valve are controlled to connect the engine heat exchange circuit to the motor heat exchange circuit through the heat exchange circuit.

9. A vehicle, characterized in that: The method comprises an electronic device and a vehicle thermal management system as claimed in any one of claims 1 to 6, wherein the electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method as claimed in claim 7 or 8 when executing the computer program.

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