A thermal management system, method, computer equipment, vehicle, and storage medium

Abstract

This invention relates to the field of new energy technology and discloses a thermal management system, method, computer equipment, vehicle, and storage medium. The water-cooled condenser designed in this invention connects the refrigerant circuit and the heating circuit, and can dissipate the high-temperature refrigerant emitted by the electric compressor in the refrigerant circuit to the heating circuit. At the same time, the designed first three-way valve can realize the selective heating of the passenger compartment and battery by the heat exchanged water in the heating circuit. This enables the vehicle to use the refrigerant circuit to heat the passenger compartment and battery in pure electric mode, without the need for the engine and water heater, thus saving energy.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, specifically to a thermal management system, method, computer equipment, vehicle, and storage medium. Background Technology

[0002] With the development and increasing popularity of new energy vehicles, more and more users are gradually recognizing their value. When buying a new or repurchased car, more and more users will choose to buy new energy vehicles. However, the performance of power batteries deteriorates in low temperatures, resulting in a reduction in the vehicle's range and a significant impact on normal driving mileage. Furthermore, the current coverage of public charging facilities is not comprehensive. For first-time car buyers and those who only own one car and are replacing it, considering long-distance travel during holidays, pure electric vehicles are often not the preferred choice. In this situation, hybrid models have become a better option.

[0003] As battery costs decrease, hybrid vehicles are achieving longer pure electric ranges, enabling driving scenarios where only the generator is operating normally, i.e., in pure electric mode. However, in low-temperature driving scenarios, the existing thermal management system architecture only considers the normal operation of the power system. The passenger compartment or battery heating relies on the engine's waste heat or water heaters. In pure electric mode, the engine's waste heat cannot be used, and water heaters are used for heating, resulting in higher overall vehicle energy consumption. Summary of the Invention

[0004] In view of this, the present invention provides a thermal management system, method, computer equipment, vehicle, and storage medium to solve the problem that heat pump systems increase system costs and waste resources, and have design redundancy in vehicle use scenarios with consistently high temperatures.

[0005] In a first aspect, the present invention provides a thermal management system, which includes at least a heating circuit, a refrigerant circuit, a battery circuit, a first three-way valve, and a water-cooled condenser. The refrigerant circuit includes an electric compressor. The heating circuit and the refrigerant circuit are connected through the water-cooled condenser, which is used to exchange heat from the high-temperature refrigerant emitted by the electric compressor in the refrigerant circuit to the heating circuit. The first port of the first three-way valve is connected to the heating circuit, the second port is connected to the passenger compartment heating device, and the third port is connected to the battery circuit, and is used to adjust the connection relationship between the heating circuit, the heating device, and the battery circuit.

[0006] The thermal management system provided by this invention features a water-cooled condenser that connects the refrigerant circuit and the heating circuit. This condenser can dissipate the high-temperature refrigerant from the electric compressor in the refrigerant circuit to the heating circuit. Simultaneously, the designed first three-way valve enables the heating circuit to selectively heat the passenger compartment and battery using the water after heat exchange. This allows the vehicle to use the refrigerant circuit to heat the passenger compartment and battery in pure electric mode, eliminating the need for an engine and water heater, thus saving energy.

[0007] In one optional embodiment, the thermal management system further includes an electric drive cooling circuit, a waste heat recovery unit, and a second three-way valve. The electric drive cooling circuit includes at least a low-temperature radiator, an electronic control unit, a rear electric drive, and a water-cooled intermediate cooler. The fourth port of the second three-way valve is connected to the refrigerant circuit through the waste heat recovery unit. The fifth port is located on the pipeline through which the waste heat from the electronic control unit, the rear electric drive, and the water-cooled intermediate cooler flows. The sixth port is located at the inlet end of the low-temperature radiator in the electric drive cooling circuit and is used to adjust the flow direction of the electric drive waste heat. The waste heat recovery unit is used to increase the temperature of the refrigerant by utilizing the recovered electric drive waste heat.

[0008] The second three-way valve designed in this invention regulates the flow direction of the waste heat from the electric drive, allowing the waste heat to enter the waste heat recovery unit. This enables the refrigerant, after heat exchange and throttling and pressure reduction, to absorb the waste heat from the electric drive and increase its temperature. The refrigerant, now at a higher temperature, returns to the electric compressor, reducing the work done by the electric compressor and lowering the energy consumption of the thermal management system.

[0009] In one optional embodiment, the thermal management system further includes a first refrigerant shut-off valve and a second refrigerant shut-off valve. The refrigerant circuit also includes a condenser and an electronic expansion valve. The first refrigerant shut-off valve is installed on the pipeline connecting the electric compressor and the waste heat recovery unit, and is used to control the refrigerant discharged from the electric compressor to enter the passenger compartment evaporator or battery circuit after passing through the electronic expansion valve and the condenser. The second refrigerant shut-off valve is installed on the pipeline connecting the electric compressor and the water-cooled condenser, and is used to control the high-temperature refrigerant discharged from the electric compressor to enter the water-cooled condenser.

[0010] This invention achieves cooling or heating of the passenger compartment and / or battery by setting the conduction state of the first refrigerant shut-off valve and the second refrigerant shut-off valve, respectively.

[0011] In one optional embodiment, the battery circuit includes at least a battery cooler and a battery, wherein the first port of the first three-way valve is connected to the outlet of the water-cooled condenser, the second port is connected to the heating device of the passenger compartment, and the third port is connected to the battery cooler in the battery circuit; the battery cooler is connected to the battery and is used to receive water flowing out of the battery, and after heat exchange, the water flows into the battery.

[0012] The present invention designs a first three-way valve to realize the heating circuit for heating the crew compartment and / or battery.

[0013] In one optional embodiment, the thermal management system further includes an engine circuit and a four-way valve, wherein the seventh and eighth ports of the four-way valve are connected to the engine circuit, and the ninth and tenth ports are connected to the heating circuit, for adjusting the connection relationship between the engine circuit and the heating circuit.

[0014] In one optional implementation, the engine circuit includes at least an engine and an electronic main water pump, wherein the seventh port of the four-way valve is connected to the engine outlet, the eighth port is connected to the engine inlet via the electronic main water pump, the ninth port is connected to the passenger compartment heating system, and the tenth port is connected to the inlet of the water-cooled condenser.

[0015] The four-way valve designed in this invention can support the direct heating of the passenger compartment and battery by the waste heat of the engine during operation, and also supports the heating of the passenger compartment and battery by the refrigerant circuit in pure electric mode, thereby improving the energy utilization efficiency and capacity of the entire system, avoiding energy waste, and improving energy utilization by more than 5%.

[0016] In one optional embodiment, the thermal management system further includes a first refrigerant expansion valve and a second refrigerant expansion valve. The battery circuit includes at least a battery cooler and a battery. The first refrigerant expansion valve is disposed on the pipeline connecting the condenser and the evaporator of the passenger compartment air conditioning unit, and is used to control the refrigerant discharged from the condenser to enter the evaporator of the passenger compartment air conditioning unit. The second refrigerant expansion valve is disposed on the pipeline connecting the battery cooler and the condenser, and is used to control the refrigerant discharged from the condenser to enter the battery cooler. The battery cooler is connected to the battery and is used to receive water flowing out of the battery, and after heat exchange, the water flows into the battery.

[0017] This invention, by setting a first refrigerant expansion valve and a second refrigerant expansion valve, and based on the respective conduction states of the two refrigerant expansion valves, realizes the cooling of the passenger compartment and / or battery by the refrigerant circuit, making the application scenarios of the thermal management system more comprehensive.

[0018] In one alternative implementation, the first three-way valve is a three-way proportional valve.

[0019] The three-way valve designed in this invention is a three-way proportional valve. When heating the passenger compartment and the battery at the same time, the corresponding outflow ratio can be set according to the requirements of the thermal management system, thereby improving the flexibility of the system heating.

[0020] Secondly, the present invention provides a thermal management method applicable to the thermal management method of the first aspect or any corresponding embodiment thereof. The method includes: acquiring the current driving mode of the vehicle, the operating state of the battery, and the temperature of the passenger compartment; determining the battery temperature requirement based on the operating state of the battery, and determining the current thermal management requirement based on the relationship between the current driving mode of the vehicle, the current battery temperature, the battery temperature requirement, the temperature of the passenger compartment, and the user's temperature requirement for the passenger compartment; and controlling the port conduction state of the first three-way valve, the second three-way valve, and the four-way valve based on the current thermal management requirement to change the operating state of the thermal management system to meet the current thermal management requirement.

[0021] The thermal management method provided by this invention determines the battery temperature requirement based on the vehicle's current driving mode and the battery's operating state. Based on the relationship between the current battery temperature and the battery temperature requirement, as well as the relationship between the current passenger compartment temperature and the user's temperature requirement for the passenger compartment, the current thermal management requirement is determined. Then, based on the determined thermal management requirement, the ports of the first three-way valve, the second three-way valve, and the four-way valve are controlled to open, thereby achieving the goal of meeting the current thermal management requirement.

[0022] In one optional implementation, determining the battery temperature requirement based on the battery's operating state, and determining the current thermal management requirement based on the vehicle's current driving mode, the battery temperature requirement, and the relationship between the passenger compartment temperature and the user's temperature requirement for the passenger compartment, includes: if the current battery temperature is within the battery temperature requirement range, but the current passenger compartment temperature is greater than the user's temperature requirement for the passenger compartment, determining the current thermal management requirement as a first thermal management requirement for the refrigerant circuit to cool the passenger compartment; or, if the current battery operating state is charging, or the current battery temperature is greater than the battery temperature requirement range, and the current passenger compartment temperature is greater than the user's temperature requirement for the passenger compartment, determining the current thermal management requirement as a second thermal management requirement for the refrigerant circuit to cool both the passenger compartment and the battery; or, if the vehicle's current driving mode is engine operating mode, the current battery temperature is within the battery temperature requirement range, but the current passenger compartment temperature is less than the user's temperature requirement for the passenger compartment. The current thermal management requirement is determined as the third thermal management requirement: heating of the passenger compartment by the engine circuit. Alternatively, if the vehicle is currently in engine operating mode, the current battery temperature is below the required battery temperature range, and the current passenger compartment temperature is below the user's required passenger compartment temperature, the current thermal management requirement is determined as the fourth thermal management requirement: heating of the passenger compartment and battery by the engine circuit. Alternatively, if the vehicle is currently in pure electric mode, the current battery temperature is within the required battery temperature range, but the current passenger compartment temperature is below the user's required passenger compartment temperature, the current thermal management requirement is determined as the fifth thermal management requirement: heating of the passenger compartment by the refrigerant circuit. Alternatively, if the vehicle is currently in pure electric mode, the current battery temperature is below the required battery temperature range, and the current passenger compartment temperature is below the user's required passenger compartment temperature, the current thermal management requirement is determined as the sixth thermal management requirement: heating of the passenger compartment and battery by the refrigerant circuit.

[0023] This invention takes into account the different thermal management requirements corresponding to different scenarios, and controls the conduction state of the first three-way valve, the second three-way valve and the four-way valve based on different thermal management requirements, thereby changing the working state of the system to meet the thermal management requirements, which is more comprehensive.

[0024] In one optional implementation, controlling the port conduction states of the first three-way valve, the second three-way valve, and the four-way valve based on the current thermal management requirement includes: if the current thermal management requirement is a first thermal management requirement or a second thermal management requirement, controlling the fifth and sixth ports of the second three-way valve to be open, and the first three-way valve and the four-way valve to be closed; if the current thermal management requirement is a third thermal management requirement, controlling the fifth and sixth ports of the second three-way valve to be open, the first and second ports of the first three-way valve to be open, and the seventh and ninth ports of the four-way valve to be connected, and the eighth and tenth ports to be connected; if the current thermal management requirement is a fourth thermal management requirement, controlling the fifth and sixth ports of the second three-way valve to be open, and the first three-way valve to be closed, and the fourth three-way valve to be closed. The first, second, and third ports of the three-way valve are all open, and the seventh and ninth ports of the four-way valve are connected and open, as are the eighth and tenth ports. If the current thermal management requirement is the fifth thermal management requirement, the fourth and fifth ports of the second three-way valve are opened, the first and second ports of the first three-way valve are opened, and the seventh and eighth ports of the four-way valve are connected and open, as are the ninth and tenth ports. If the current thermal management requirement is the sixth thermal management requirement, the fourth and fifth ports of the second three-way valve are opened, the first, second, and third ports of the first three-way valve are all open, and the seventh and eighth ports of the four-way valve are connected and open, as are the ninth and tenth ports.

[0025] In one optional implementation, the method further includes: if the current thermal management demand is a first thermal management demand or a second thermal management demand, controlling the first refrigerant shut-off valve to open and the second refrigerant shut-off valve to close; if the current thermal management demand is a third thermal management demand or a fourth thermal management demand, controlling both the first and second refrigerant shut-off valves to close; if the current thermal management demand is a fifth thermal management demand or a sixth thermal management demand, controlling the first refrigerant shut-off valve to close and the second refrigerant shut-off valve to open.

[0026] In an optional implementation, the method further includes: if the current thermal management demand is a first thermal management demand, controlling the first refrigerant expansion valve to open and the second refrigerant expansion valve to close; if the current thermal management demand is a second thermal management demand, controlling both the first and second refrigerant expansion valves to open; if the current thermal management demand is a third, fourth, fifth, or sixth thermal management demand, controlling both the first and second refrigerant expansion valves to close.

[0027] Thirdly, the present invention provides a computer device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the thermal management method described in the second aspect or any corresponding embodiment thereof.

[0028] Fourthly, the present invention provides a vehicle comprising a thermal management system and a controller according to the first aspect or any corresponding embodiment thereof, the controller being configured to execute the thermal management method according to the second aspect or any corresponding embodiment thereof.

[0029] Fifthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform the thermal management method described in the first aspect or any corresponding embodiment thereof.

[0030] The thermal management system provided by this invention features a water-cooled condenser that connects the refrigerant circuit and the heating circuit. This condenser can dissipate the high-temperature refrigerant from the electric compressor in the refrigerant circuit to the heating circuit. Simultaneously, the designed first three-way valve enables the heating circuit to selectively heat the passenger compartment and battery using the heat-exchanged water. This allows the vehicle to heat the passenger compartment and battery using the refrigerant circuit in pure electric mode, eliminating the need for an engine and water heater, thus saving energy. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a structural example diagram of a thermal management system according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic flowchart of a thermal management method according to an embodiment of the present invention;

[0034] Figure 3 This is a flowchart illustrating the first thermal management requirement in the thermal management method according to an embodiment of the present invention.

[0035] Figure 4 This is a flowchart illustrating the second thermal management requirement in the thermal management method according to an embodiment of the present invention.

[0036] Figure 5 This is a flowchart illustrating a third thermal management requirement in a thermal management method according to an embodiment of the present invention.

[0037] Figure 6 This is a flowchart illustrating the fourth thermal management requirement in the thermal management method according to an embodiment of the present invention.

[0038] Figure 7This is a flowchart illustrating the fifth thermal management requirement in the thermal management method according to an embodiment of the present invention.

[0039] Figure 8 This is a flowchart illustrating the sixth thermal management requirement in the thermal management method according to an embodiment of the present invention.

[0040] Figure 9 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention;

[0041] Figure 10 This is a structural example diagram of a vehicle according to an embodiment of the present invention.

[0042] In the diagram, the components are: 1. Electric compressor; 2. Second refrigerant shut-off valve; 3. Water-cooled condenser; 4. First refrigerant shut-off valve; 5. Electronic expansion valve; 6. Waste heat recovery unit; 7. Condenser; 8. First refrigerant expansion valve; 9. Second refrigerant expansion valve; 10. Evaporator; 11. Battery cooler; 12. Engine; 13. Electronic main water pump; 14. Fifth water temperature sensor; 15. High-temperature radiator; 16. Second water temperature sensor; 17. High-temperature water tank; 18. Cooling fan; 19. Generator; 10. First electronic auxiliary water pump. 20. First water temperature sensor; 21. Generator radiator; 22. Low-temperature water storage tank; 23. Water-cooled intercooler; 24. Rear electric drive; 25. Electronic control; 26. Second electronic auxiliary water pump; 27. Fourth water temperature sensor; 28. Low-temperature radiator; 29. ​​Second three-way valve; 30. Four-way valve; 31. Third electronic auxiliary water pump; 32. Heating device; 33. First three-way valve; 34. Third water temperature sensor; 35. Battery; 36. Fourth electronic auxiliary water pump; 37. Battery storage tank; 38. Refrigerant check valve; 39. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The performance of power batteries deteriorates at low temperatures, resulting in a reduction in the overall vehicle range. This has a significant impact on the vehicle's driving range. Furthermore, the availability of public charging infrastructure is not yet fully developed. For first-time car buyers and those who are replacing their only car, considering long-distance travel during holidays, pure electric vehicles are often not the preferred choice. In such cases, hybrid vehicles become a better option.

[0045] As battery costs decrease, the pure electric range of hybrid vehicles is increasing. However, the existing thermal management system architecture only considers the normal operation of the powertrain. It does not take into account the use of the heat pump system in the refrigerant circuit, and the passenger compartment heating relies on the engine's waste heat or water heaters. However, in pure electric mode, the engine's waste heat cannot be used, and the use of water heaters results in high energy consumption. The pure electric mode does not consider the use of the engine's own waste heat. Under low-temperature conditions, the refrigerant system cannot be effectively combined with the water system, resulting in energy waste. The architecture design focuses more on the heat dissipation of the powertrain or battery cooling under high-temperature conditions, but does not consider energy-saving design under low-temperature conditions. Low-temperature heating relies more on the engine's waste heat, without considering the design of the heating system and energy saving in pure electric mode, among other issues.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. An embodiment of the invention discloses a thermal management system, such as... Figure 1 As shown, the thermal management system includes a heating circuit, a refrigerant circuit, and a battery circuit, and also includes a first three-way valve 34 and a water-cooled condenser 3. The heating circuit and the refrigerant circuit are connected through the water-cooled condenser 3, which is used to exchange heat from the high-temperature refrigerant emitted by the electric compressor 1 in the refrigerant circuit to the heating circuit. The first port of the first three-way valve 34 is connected to the heating circuit, the second port is connected to the heating device 33 in the passenger compartment, and the third port is connected to the battery circuit, and is used to adjust the connection relationship between the heating circuit, the heating device, and the battery circuit.

[0049] like Figure 1 As shown, the thermal management system of this embodiment further includes a generator circuit, which consists of a generator radiator 22, a first water temperature sensor 21, a first electronic auxiliary water pump 20, a generator 19, a low-temperature water storage tank 23, and a cooling fan 18. The generator circuit operates as follows: water from the generator radiator 22 passes through the first water temperature sensor 21 and enters the first electronic auxiliary water pump 20. After flowing out of the first electronic auxiliary water pump 20, it enters the generator 19 and flows back to the generator radiator 22 after flowing out of the generator 19, where it exchanges heat with the air. The water supply pipe of the low-temperature water storage tank 23 is connected to the front of the first electronic auxiliary water pump 20, and the water outlet of the generator 19 is connected to the overflow port of the low-temperature water storage tank 23. The engine circuit consists of an engine 12, an electronic main water pump 13, a second water temperature sensor 16, a high-temperature radiator 15, and a fifth water temperature sensor. 14. The system consists of a high-temperature water tank 17 and a cooling fan 18. The engine 12 circuit operates as follows: water from the engine 12 enters the electronic main water pump 13, flows out of the electronic main water pump 13, passes through the second water temperature sensor 16, enters the high-temperature radiator 15, exchanges heat with the air, flows out of the high-temperature radiator 15, passes through the fifth water temperature sensor 14, and returns to the engine 12. The outlet of the high-temperature radiator 15 is connected to the overflow port of the high-temperature water tank 17, and the water supply pipe of the high-temperature water tank 17 is connected to the outlet of the electronic main water pump 13. This is just an example. The engine circuit and generator circuit automatically shut down or open as needed. The heating circuit includes a third electronic auxiliary water pump 32 and a passenger compartment heating device 33. The specific heating circuit principle is existing technology and is used to heat the passenger compartment and / or battery, which will not be described in detail here. The refrigerant circuit of this embodiment includes an electric compressor 1, a refrigerant one-way valve 39, and an electronic expansion valve 5. The heating circuit and the refrigerant circuit are connected through a water-cooled condenser 3. The water-cooled condenser 3 is used to exchange heat between the high-temperature refrigerant discharged from the refrigerant circuit and the heating circuit. When the vehicle is in pure electric mode and low-temperature operating conditions, and the engine 12 is not working, the refrigerant circuit heats the passenger compartment and / or the battery. The high-temperature and high-pressure refrigerant discharged from the electric compressor 1 enters the water-cooled condenser 3. The water-cooled condenser 3 is used to exchange heat between the high-temperature refrigerant and the water in the heating circuit, thereby increasing the temperature of the water flowing in the heating circuit. The refrigerant after heat exchange flows out from the water-cooled condenser 3, passes through the refrigerant one-way valve 39, and then passes through the electronic expansion valve 5 for throttling and pressure reduction before entering the waste heat recovery unit 6. At this time, the refrigerant entering the waste heat recovery unit 6 has a lower temperature after heat exchange and throttling and pressure reduction by the electronic expansion valve 5.

[0050] In this embodiment of the invention, the water flowing in the heating circuit exchanges heat with the high-temperature refrigerant through the water-cooled condenser and then enters the first port of the first three-way valve 34. Based on the conduction mode of the first three-way valve 34, the water after heat exchange can flow out from the second port or the third port to heat the crew cabin or battery.

[0051] The thermal management system provided by this invention features a water-cooled condenser that connects the refrigerant circuit and the heating circuit. This condenser can dissipate the high-temperature refrigerant from the electric compressor in the refrigerant circuit to the heating circuit. Simultaneously, the designed first three-way valve enables the heating circuit to selectively heat the passenger compartment and battery using the heat-exchanged water. This allows the vehicle to heat the passenger compartment and battery using the refrigerant circuit in pure electric mode, eliminating the need for an engine and water heater, thus saving energy.

[0052] In some optional embodiments, the thermal management system further includes an electric drive cooling circuit, a waste heat recovery unit, and a second three-way valve 30. The electric drive cooling circuit includes at least a low-temperature radiator 29, an electronic control unit 26, a rear electric drive unit 25, and a water-cooled intermediate cooler 24. The fourth port of the second three-way valve 30 is connected to the refrigerant circuit through the waste heat recovery unit 6. The fifth port is located on the pipeline through which the waste heat from the electronic control unit 26, the rear electric drive unit 25, and the water-cooled intermediate cooler 24 flows. The sixth port is located at the inlet end of the low-temperature radiator 29 in the electric drive cooling circuit and is used to adjust the flow direction of the electric drive waste heat. The waste heat recovery unit 6 is used to increase the temperature of the refrigerant by utilizing the recovered electric drive waste heat.

[0053] like Figure 1As shown, the electric drive cooling circuit of this embodiment includes a low-temperature radiator 29, a fourth water temperature sensor 28, a second electronic auxiliary water pump 27, an electronic control unit 26, a rear electric drive unit 25, and a water-cooled intercooler 24. The fourth port of the second three-way valve 30 is connected to the refrigerant circuit through the waste heat recovery unit 6, the fifth port is connected to the low-temperature radiator 29 through the electronic control unit 26, the rear electric drive unit 25, and the water-cooled intercooler 24, and the sixth port is connected to the inlet end of the low-temperature radiator 29. Based on the second three-way valve 30... The conduction mode is used to adjust the flow of waste heat from the electric drive. The working state of the electric drive heat dissipation circuit is as follows: the water outlet of the low-temperature radiator 29 enters the second electronic auxiliary water pump 27 through the fourth water temperature sensor 28. After flowing out of the second electronic auxiliary water pump 27, it enters the electronic control 26, the rear electric drive 25, and the water-cooled intercooler 24 respectively. After flowing out of the electronic control 26, the rear electric drive 25, and the water-cooled intercooler 24, it is combined into one channel and enters the second three-way valve 30. It enters from the fifth port of the second three-way valve 30. Among them, the electronic control 26... The waste heat from the rear electric drive 25 and the water-cooled intercooler 24 flows into the pipeline. At this time, the waste heat from the electric drive enters the fifth port of the second three-way valve 30. Then, depending on the conduction mode of the second three-way valve 30, the waste heat from the electric drive flowing into the fifth port can flow out from the fourth port or from the sixth port to achieve different functions. For example, under high temperature conditions, the fourth port is closed to avoid the waste heat from the electric drive affecting the heat dissipation of the refrigerant circuit. When the vehicle is in pure electric mode and under low temperature conditions, the engine 12 does not work, so the fourth port is open, and the waste heat from the electric drive flows into the waste heat recovery unit 6 through the fourth port. Then, the refrigerant in the waste heat recovery unit 6 absorbs the heat from the electric drive, further increasing the temperature of the refrigerant. The refrigerant that has absorbed the waste heat from the electric drive flows out from the waste heat recovery unit 6, passes through the condenser 7, the first refrigerant expansion valve 8 and the evaporator 10, and finally returns to the electric compressor 1. This can reduce the work done by the electric compressor 1, thereby reducing system energy consumption and achieving the purpose of energy saving.

[0054] The second three-way valve designed in this invention is used to avoid the impact of waste heat from the electric drive on the heat dissipation of the refrigerant system under high-temperature conditions. At the same time, under low-temperature conditions, the refrigerant can absorb the waste heat from the electric drive through the waste heat recovery device, thereby reducing energy consumption.

[0055] In some optional embodiments, the thermal management system further includes a first refrigerant shut-off valve 4 and a second refrigerant shut-off valve 2. The refrigerant circuit includes at least a condenser 7 and an electronic expansion valve 5. The first refrigerant shut-off valve 4 is installed on the pipeline connecting the electric compressor 1 and the waste heat recovery unit 6, and is used to control the refrigerant discharged from the electric compressor 1 to enter the crew compartment evaporator 10 or the battery circuit after passing through the electronic expansion valve 5 and the condenser 7. The second refrigerant shut-off valve 2 is installed on the pipeline connecting the electric compressor 1 and the water-cooled condenser 3, and is used to control the high-temperature refrigerant discharged from the electric compressor 1 to enter the water-cooled condenser 3.

[0056] like Figure 1As shown, the thermal management system also includes a first refrigerant shut-off valve 4 and a second refrigerant shut-off valve 2. The first refrigerant shut-off valve 4 is installed on the pipeline connecting the electric compressor 1 and the electronic expansion valve 5. When the first refrigerant expansion valve 8 is open, the high-temperature refrigerant discharged from the electric compressor 1 flows through the first refrigerant shut-off valve 4 and the electronic expansion valve 5, where it is throttled and depressurized, before passing through the waste heat recovery unit 6 and the condenser and entering the crew compartment evaporator 10 and / or the battery circuit. The second refrigerant shut-off valve 2 is installed on the pipeline connecting the electric compressor 1 and the water-cooled condenser 3. When the second refrigerant shut-off valve 2 is open, the high-temperature refrigerant discharged from the electric compressor 1 flows directly into the water-cooled condenser 3 for heat exchange, as illustrated in this example.

[0057] This invention achieves cooling or heating of the passenger compartment and / or battery by setting the conduction state of the first refrigerant shut-off valve and the second refrigerant shut-off valve, respectively.

[0058] Specifically, the thermal management system also includes a first refrigerant expansion valve 8 and a second refrigerant expansion valve 9. The battery circuit includes at least a battery cooler 11 and a battery. The first refrigerant expansion valve 8 is installed on the pipeline connecting the condenser 7 and the crew compartment evaporator 10, and is used to control the refrigerant discharged from the condenser 7 to enter the crew compartment evaporator 10. The second refrigerant expansion valve 9 is installed on the pipeline connecting the battery cooler 11 and the condenser 7, and is used to control the refrigerant discharged from the condenser 7 to enter the battery cooler 11. The battery cooler 11 is connected to the battery 36 and is used to receive water flowing out of the battery, and after heat exchange, the water flows into the battery.

[0059] In this embodiment of the invention, the first refrigerant expansion valve 8 is installed on the pipeline connecting the condenser 7 and the passenger compartment evaporator 10, and the second refrigerant expansion valve 9 is installed on the pipeline connecting the battery cooler 11 and the condenser 7. When the thermal management requirement is cooling, the first refrigerant shut-off valve 4 is open. The refrigerant discharged from the electric compressor 1 is throttled and depressurized by the electronic expansion valve 5, passes through the waste heat recovery unit 6 and the condenser 7, and then enters the first refrigerant expansion valve 8 and the second refrigerant expansion valve 9. If the first refrigerant expansion valve 8 is open, the refrigerant flows into the passenger compartment evaporator 10 and exchanges heat with the passenger compartment air before exiting the evaporator. The refrigerant flows out of the battery and finally into the electric compressor 1. If the second refrigerant expansion valve 9 is open, the refrigerant flows into the battery cooler 11. The battery circuit includes at least the battery 36, the fourth electronic auxiliary water pump 37, the battery water tank 38, and the third water temperature sensor 35. The water from the battery enters the fourth electronic auxiliary water pump 37, flows out of the fourth electronic auxiliary water pump 37 and then into the electronic water tank 38. After flowing out of the electronic water tank 38, it enters the battery cooler 11. The battery cooler 11 exchanges heat between the water and refrigerant flowing out of the battery 36 and then flows out of the battery cooler 11, passes through the third water temperature sensor, and enters the battery 36. This is just an example.

[0060] This invention, by setting a first refrigerant expansion valve and a second refrigerant expansion valve, and based on the respective conduction states of the two refrigerant expansion valves, realizes the cooling of the passenger compartment and / or battery by the refrigerant circuit, making the application scenarios of the thermal management system more comprehensive.

[0061] In some optional embodiments, the battery circuit includes at least a battery cooler 11 and a battery 36. The first port of the first three-way valve 34 is connected to the outlet of the water-cooled condenser 3, the second port is connected to the heating device 33 of the passenger compartment, and the third port is connected to the battery cooler 11 in the battery circuit. The battery cooler 11 is connected to the battery 36 and is used to receive water flowing out of the battery 36, and after heat exchange, the water flows into the battery 36.

[0062] like Figure 1 As shown, in this embodiment of the invention, the first port of the first three-way valve 34 is connected to the outlet of the water-cooled condenser 3. After heat exchange with the high-temperature refrigerant through the water-cooled condenser 3, the heat-exchanged water can directly enter the first port of the first three-way valve 34. The second port of the first three-way valve 34 is connected to the heating device 33 of the passenger compartment. The heating device 33 can be a heating core, which is only an example. The third port is connected to the battery cooler 11 in the battery circuit. Then, based on the conduction mode of the first three-way valve 34, the heating circuit can heat the battery 36 and / or the passenger compartment.

[0063] Specifically, the first three-way valve 34 is a three-way proportional valve. The heat outflow ratio of the second and third ports can be adjusted based on the needs of the thermal management system. The corresponding outflow ratio is set, with one outflow going into the heating device 33 and the other outflow going into the battery cooler 11. This is just an example.

[0064] The three-way valve designed in this invention is a three-way proportional valve. When heating the passenger compartment and the battery at the same time, the corresponding outflow ratio can be set according to the requirements of the thermal management system, thereby improving the flexibility of the system heating.

[0065] In some alternative embodiments, the thermal management system further includes an engine circuit and a four-way valve 31, wherein the seventh and eighth ports of the four-way valve 31 are connected to the engine circuit, and the ninth and tenth ports are connected to the heating circuit, for adjusting the connection relationship between the engine circuit and the heating circuit.

[0066] like Figure 1 As shown, the seventh and eighth ports of the four-way valve 31 are connected to the engine circuit, and the ninth and tenth ports are connected to the heating circuit to adjust the connection relationship between the engine 12 circuit and the heating circuit. For example, the seventh and ninth ports are connected and the eighth and tenth ports are connected, realizing the series connection between the engine circuit and the heating circuit. This allows the waste heat from the engine 12 to flow into the heating device 33 in the passenger compartment through the connected four-way valve 31 to heat the passenger compartment. When the vehicle is in pure electric mode, the engine 12 does not work, and the seventh and eighth ports of the corresponding four-way valve 31 are connected and the ninth and tenth ports are connected, closing the connection between the engine circuit and the heating circuit. This is just an example; the detailed connection method can be set according to the actual situation.

[0067] Specifically, the engine 12 circuit includes at least the engine 12 and the electronic main water pump 13. The seventh port of the four-way valve 31 is connected to the outlet of the engine 12, the eighth port is connected to the inlet of the engine 12 through the electronic main water pump 13, the ninth port is connected to the heating device 33 of the crew compartment, and the tenth port is connected to the inlet of the water-cooled condenser 3.

[0068] In this embodiment of the invention, the seventh port of the four-way valve 31 is connected to the outlet of the engine 12, the eighth port is connected to the inlet of the engine 12 via the electronic main water pump 13, the ninth port is connected to the heating device 33 in the passenger compartment, and the tenth port is connected to the inlet of the water-cooled condenser 3. When the vehicle is in the engine 12 operating state, the seventh and ninth ports are connected and the eighth and tenth ports are connected and connected. Water from the engine 12 enters the electronic main water pump 13, flows out from the electronic main water pump 13, enters the four-way valve 31, enters from the eighth port of the four-way valve 31, flows out from the tenth port, passes through the water-cooled condenser 3, enters the first three-way valve 34, flows in from the first port of the first three-way valve 34, and then flows out from the second and / or third ports. After passing through the heating device 33 and / or the battery cooler 11, it flows out again through the ninth and seventh ports and flows back to the engine 12. This is just an example. If the vehicle is in pure electric mode and engine 12 is not working, then the seventh and eighth ports are connected, and the ninth and tenth ports are connected. This is just an example.

[0069] The four-way valve designed in this invention can support the direct heating of the passenger compartment and battery by the waste heat of the engine during operation, and also supports the heating of the passenger compartment and battery by the refrigerant circuit in pure electric mode, thereby improving the energy utilization efficiency and capacity of the entire system, avoiding energy waste, and improving energy utilization by more than 5%.

[0070] According to an embodiment of the present invention, a thermal management method embodiment is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0071] This embodiment provides a thermal management method that can be used in the thermal management system described in the above embodiments. Figure 2 This is a flowchart of a thermal management method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0072] Step S201: Obtain the vehicle's current driving mode, battery operating status, and passenger compartment temperature.

[0073] Step S202: Determine the battery temperature requirement based on the battery's operating status, and determine the current thermal management requirements based on the vehicle's current driving mode, the current battery temperature and battery temperature requirement, as well as the relationship between the passenger compartment temperature and the user's temperature requirement for the passenger compartment.

[0074] Step S203: Based on the current thermal management requirements, control the port conduction status of the first three-way valve, the second three-way valve, and the four-way valve to change the working state of the thermal management system to meet the current thermal management requirements.

[0075] This invention can obtain the vehicle's current driving mode, including but not limited to pure electric mode or hybrid mode. If the vehicle is in pure electric mode, the generator circuit in the corresponding thermal management system operates, while the engine circuit does not. If the vehicle is in hybrid mode, the engine circuit and generator circuit automatically turn on or off based on demand. The battery's operating state can include, but is not limited to, driving conditions and charging conditions. In driving conditions, when the battery temperature exceeds a preset battery temperature threshold, the battery will issue a cooling request. In charging conditions, the battery will directly request cooling. The current battery temperature and passenger compartment temperature can also be collected in real time using sensors and other acquisition devices. The current battery status can also be obtained in real time. Different battery operating states have corresponding normal temperature requirement ranges. The current battery temperature and the normal temperature requirement range corresponding to the current battery operating state can be... The system compares the current battery temperature with the current temperature of the passenger compartment. If the current battery temperature is lower than the required normal temperature range, the current thermal management requirement is determined to be heating the battery. Users can set the comfort temperature of the passenger compartment according to their own preferences. The system compares the user-set comfort temperature with the current passenger compartment temperature. For example, if the current passenger compartment temperature is lower than the user-set comfort temperature, the current thermal management requirement is determined to be heating the passenger compartment. This is just an example. Then, based on the determined thermal management requirement, the conduction status of the first three-way valve, the second three-way valve, and the four-way valve can be controlled to change the working status of the thermal management system. For example, if the current thermal management requirement is determined to be heating the passenger compartment in pure electric mode, then the first and second ports of the first three-way valve, the fourth and fifth ports of the second three-way valve, the seventh and eighth ports of the four-way valve, and the ninth and tenth ports of the four-way valve are connected and connected. This is just an example.

[0076] The thermal management method provided by this invention determines the battery temperature requirement based on the vehicle's current driving mode and the battery's operating state. Based on the relationship between the current battery temperature and the battery temperature requirement, as well as the relationship between the current passenger compartment temperature and the user's temperature requirement for the passenger compartment, the current thermal management requirement is determined. Then, based on the determined thermal management requirement, the ports of the first three-way valve, the second three-way valve, and the four-way valve are controlled to open, thereby achieving the goal of meeting the current thermal management requirement.

[0077] Specifically, if the current battery temperature is within the required battery temperature range, but the current passenger compartment temperature is higher than the user's desired passenger compartment temperature, the current thermal management requirement is determined to be the first thermal management requirement of the refrigerant circuit for cooling the passenger compartment. Alternatively, if the current battery operating state is charging, or the current battery temperature is higher than the required battery temperature range, and the current passenger compartment temperature is higher than the user's desired passenger compartment temperature, the current thermal management requirement is determined to be the second thermal management requirement of the refrigerant circuit for cooling both the passenger compartment and the battery. Or, if the vehicle's current driving mode is engine operating mode, the current battery temperature is within the required battery temperature range, but the current passenger compartment temperature is lower than the user's desired passenger compartment temperature, the current thermal management requirement is determined to be the third thermal management requirement of the engine circuit for heating the passenger compartment. Alternatively, if the vehicle is currently in engine operating mode... If the current driving mode is engine operating mode, the current battery temperature is below the required battery temperature range, and the current passenger compartment temperature is below the user's required passenger compartment temperature, then the current thermal management requirement is determined to be the fourth thermal management requirement for heating the passenger compartment and battery via the engine circuit. Alternatively, if the current driving mode is pure electric mode, the current battery temperature is within the required battery temperature range, but the current passenger compartment temperature is below the user's required passenger compartment temperature, then the current thermal management requirement is determined to be the fifth thermal management requirement for heating the passenger compartment via the refrigerant circuit. Alternatively, if the current driving mode is pure electric mode, the current battery temperature is below the required battery temperature range, and the current passenger compartment temperature is below the user's required passenger compartment temperature, then the current thermal management requirement is determined to be the sixth thermal management requirement for heating the passenger compartment and battery via the refrigerant circuit.

[0078] This invention identifies the thermal management requirements for all possible situations involving the battery and passenger compartment during vehicle operation, thereby improving the applicability of the thermal management method.

[0079] Specifically, based on the current thermal management requirements, the on / off states of the first three-way valve, the second three-way valve, and the four-way valve are controlled, including: if the current thermal management requirement is the first or second thermal management requirement, the fifth and sixth ports of the second three-way valve are controlled to be open, while the first three-way valve and the four-way valve are closed; if the current thermal management requirement is the third thermal management requirement, the fifth and sixth ports of the second three-way valve are controlled to be open, the first and second ports of the first three-way valve are open, and the seventh and ninth ports of the four-way valve are connected, as are the eighth and tenth ports; if the current thermal management requirement is the fourth thermal management requirement, the fifth and sixth ports of the second three-way valve are controlled to be open, while the first and second ports of the first three-way valve are closed. If the first, second, and third ports are all open, the seventh and ninth ports of the four-way valve are connected, and the eighth and tenth ports are connected. If the current thermal management requirement is the fifth thermal management requirement, the fourth and fifth ports of the second three-way valve are opened, the first and second ports of the first three-way valve are opened, the seventh and eighth ports of the four-way valve are connected, and the ninth and tenth ports are connected. If the current thermal management requirement is the sixth thermal management requirement, the fourth and fifth ports of the second three-way valve are opened, the first, second, and third ports of the first three-way valve are all open, the seventh and eighth ports of the four-way valve are connected, and the ninth and tenth ports are connected.

[0080] In one optional implementation, if the current thermal management demand is a first thermal management demand or a second thermal management demand, the first refrigerant shut-off valve is opened and the second refrigerant shut-off valve is closed; if the current thermal management demand is a third thermal management demand or a fourth thermal management demand, both the first and second refrigerant shut-off valves are closed; if the current thermal management demand is a fifth thermal management demand or a sixth thermal management demand, the first refrigerant shut-off valve is closed and the second refrigerant shut-off valve is opened.

[0081] In one optional implementation, if the current thermal management demand is the first thermal management demand, the first refrigerant expansion valve is turned on and the second refrigerant expansion valve is turned off; if the current thermal management demand is the second thermal management demand, both the first and second refrigerant expansion valves are turned on; if the current thermal management demand is the third, fourth, fifth, or sixth thermal management demand, both the first and second refrigerant expansion valves are turned off.

[0082] like Figure 3As shown in the diagram, the dashed lines represent the circuits that do not circulate, while the dashed lines represent the circuits through which heat or refrigerant flows. If the current thermal management requirement is the primary thermal management requirement, i.e., when cooling the passenger compartment, the refrigerant circuit and electric drive cooling circuit operate. The engine circuit and generator circuit automatically open or close based on demand, while the heating circuit and battery circuit do not operate. The fifth and sixth ports of the second three-way valve are open, the first three-way valve and four-way valve are closed, the first refrigerant shut-off valve is open, the second refrigerant shut-off valve is closed, the first refrigerant expansion valve is open, and the second refrigerant expansion valve is closed. The refrigerant circuit is as follows: The high-temperature, high-pressure refrigerant discharged from the electric compressor 1 assembly passes through the first refrigerant shut-off valve, electronic expansion valve, and waste heat recovery unit into the condenser, where it exchanges heat with the air. After heat exchange, the refrigerant... The refrigerant enters the first refrigerant expansion valve, and after being throttled and depressurized by the first refrigerant expansion valve, it enters the evaporator to exchange heat with the air inside the vehicle. After heat exchange, it flows out of the evaporator and returns to the electric compressor 1. The electric drive cooling circuit works as follows: the water outlet of the low-temperature radiator enters the second electronic auxiliary water pump through the fourth water temperature sensor. After flowing out of the second electronic auxiliary water pump, it enters the electronic control, the rear electric drive, and the water-cooled intercooler respectively. After flowing out of the electronic control, the rear electric drive, and the water-cooled intercooler, it is combined into one line and enters the second three-way valve. The second three-way valve can also be a three-way proportional valve. It enters from the fifth port (B port) of the second three-way valve and flows out from the sixth port (A port) and returns to the low-temperature radiator. The water supply pipe of the low-temperature reservoir assembly is connected to the front of the second electronic auxiliary water pump, and the water outlet of the low-temperature radiator is connected to the overflow port of the low-temperature reservoir.

[0083] like Figure 4As shown, if the current thermal management demand is the second thermal management demand, the refrigerant circuit and the low-temperature circuit are working, the engine circuit and the generator circuit automatically open or close based on the demand, the heating circuit and the battery circuit are not working, the fifth and sixth ports of the second three-way valve are open, the first three-way valve and the four-way valve are closed, the first refrigerant shut-off valve is open, the second refrigerant shut-off valve is closed, and both the first and second refrigerant expansion valves are open; the refrigerant circuit is as follows: the high-temperature and high-pressure refrigerant discharged from the electric compressor 1 assembly enters the condenser through the first refrigerant shut-off valve, the electronic expansion valve, and the waste heat recovery unit, where it exchanges heat with the air. The refrigerant is divided into two paths, one entering the first refrigerant expansion valve and the other entering the second refrigerant expansion valve. After being throttled and depressurized by the first and second refrigerant expansion valves, it enters the evaporator and the battery cooler respectively. The refrigerant entering the evaporator exchanges heat with the air inside the vehicle. The refrigerant entering the battery cooler exchanges heat with the antifreeze in the battery circuit. After heat exchange, the refrigerant flows out of the evaporator and the battery cooler, and after merging, returns to the electric compressor 1. The low-temperature circuit is as follows: the water outlet of the low-temperature radiator enters the second electronic auxiliary water pump through the fourth water temperature sensor. After flowing out of the second electronic auxiliary water pump, it enters the electronic control, rear electric drive, and water-cooled intercooler respectively. After flowing out of the electronic control, rear electric drive, and water-cooled intercooler, it is combined into one line and enters the second three-way valve. The second three-way valve can also be a three-way proportional valve. It enters from the fifth port (B port) of the second three-way valve and flows out from the sixth port (A port), returning to the low-temperature radiator. The water supply pipe of the low-temperature reservoir assembly is connected to the front of the second electronic auxiliary water pump, and the water outlet of the low-temperature radiator is connected to the overflow port of the low-temperature reservoir.

[0084] like Figure 5As shown, if the current thermal management requirement is the third thermal management requirement, the engine circuit, generator circuit, cryogenic circuit, and heating circuit are working, while the refrigerant circuit and battery circuit are not working; the fifth and sixth ports of the second three-way valve are connected, the first and second ports of the first three-way valve are connected, the seventh and ninth ports of the four-way valve are connected, the eighth and tenth ports are connected, the first and second refrigerant shut-off valves are both closed, and the first and second refrigerant expansion valves are both closed; the engine circuit is as follows: engine outlet water enters the electronic main water pump, from the electronic... After flowing out of the main water pump, the water passes through the second water temperature sensor and enters the high-temperature radiator. After exchanging heat with the air, it flows out of the high-temperature radiator, passes through the fifth water temperature sensor, and returns to the engine. The high-temperature radiator outlet is connected to the high-temperature reservoir overflow port, and the high-temperature reservoir filler pipe is connected to the outlet of the electronic main water pump. The generator circuit is as follows: the water outlet of the generator radiator passes through the first water temperature sensor and enters the first electronic auxiliary water pump. After flowing out of the first electronic auxiliary water pump assembly, it enters the generator and flows out of the generator, returning to the generator radiator to exchange heat with the air. The low-temperature reservoir filler pipe is connected to the first electronic auxiliary water pump assembly. The generator outlet is connected to the overflow port of the low-temperature water tank; the low-temperature circuit is as follows: the water outlet of the low-temperature radiator enters the second electronic auxiliary water pump through the fourth water temperature sensor, and after flowing out of the second electronic auxiliary water pump, it enters the electronic control unit, the rear electric drive, and the water-cooled intercooler respectively. After flowing out of the electronic control unit, the rear electric drive, and the water-cooled intercooler, it is combined into one line and enters the second three-way valve. It enters from the fifth port (port B) of the second three-way valve and flows out from the sixth port (port A), returning to the low-temperature radiator; the water supply pipe of the low-temperature water tank assembly is connected to the front of the second electronic auxiliary water pump, and the water outlet of the low-temperature radiator is connected to the overflow port of the low-temperature water tank; heating The circuit is as follows: water from the engine enters the electronic main water pump, flows out of the electronic main water pump, enters the four-way valve, enters from the eighth port (B port) of the four-way valve, flows out from the tenth port (C port), passes through the water-cooled condenser and enters the first three-way valve, flows in from the first port (B port) of the first three-way valve, flows out from the second port (A port), enters the heater core, exchanges heat with the air in the vehicle, flows out from the heater core, enters the third electronic auxiliary water pump, flows out from the third electronic auxiliary water pump assembly and enters the four-way valve, flows in from the ninth port (D port) of the four-way water valve, flows out from the seventh port (A port), and returns to the engine.

[0085] like Figure 6As shown, if the current thermal management requirement is the fourth thermal management requirement, the engine circuit, generator circuit, cryogenic circuit, heating circuit, and battery circuit are working, while the refrigerant circuit is not working; the fifth and sixth ports of the second three-way valve are open, the first, second, and third ports of the first three-way valve are all open, the seventh and ninth ports of the four-way valve are connected and open, the eighth and tenth ports are connected and open, the first and second refrigerant shut-off valves are both closed, and the first and second refrigerant expansion valves are both closed. The engine cooling circuit operates as follows: engine outlet water enters the electronic main water pump, flows out of the electronic main water pump, passes through the second water temperature sensor, enters the high-temperature radiator, exchanges heat with the air, flows out of the high-temperature radiator, passes through the fifth water temperature sensor, and returns to the engine. The high-temperature radiator outlet is connected to the high-temperature reservoir overflow port, and the high-temperature reservoir water supply pipe is connected to the outlet of the electronic main water pump; the generator circuit operates as follows: generator radiator outlet water passes through the first water temperature sensor, enters the first electronic auxiliary water pump, flows out of the first electronic auxiliary water pump assembly, enters the generator, and from... After flowing out of the generator, the water returns to the generator radiator for heat exchange with the air. The low-temperature water tank's water supply pipe is connected to the first electronic auxiliary water pump assembly, and the generator outlet is connected to the low-temperature water tank's vent. The low-temperature circuit is as follows: water from the low-temperature radiator enters the second electronic auxiliary water pump via the fourth water temperature sensor. After flowing out of the second electronic auxiliary water pump, it enters the electronic control unit, the rear electric drive, and the water-cooled intercooler. After flowing out of the electronic control unit, the rear electric drive, and the water-cooled intercooler, the water is combined into one path and enters the second three-way valve. It enters from the fifth port (port B) and exits from the sixth port (port A) of the second three-way valve, returning to the low-temperature radiator. The water supply hose of the water tank assembly is connected to the second electronic auxiliary water pump. The outlet of the low-temperature radiator is connected to the overflow port of the low-temperature water tank. The heating circuit is as follows: engine outlet water enters the electronic main water pump, flows out of the electronic main water pump, enters the four-way valve, enters from the eighth port (B port) of the four-way valve, and flows out from the tenth port (C port). It passes through the water-cooled condenser and enters the first three-way valve, flows in from the first port (B port) of the first three-way valve, and flows out from the second port (A port) and the third port (C port). It flows out from port A and enters the heater core, where it exchanges heat with the air in the car. After heat exchange, it flows out of the heater core and flows out from port C. The coolant enters the battery cooler and exchanges heat with the antifreeze in the battery circuit. After the antifreeze flows out from the heater core and the battery cooler, it enters the third electronic auxiliary water pump. After flowing out from the third electronic auxiliary water pump (32), it enters the four-way valve. It flows in from the ninth port (D port) of the four-way valve and flows out from the seventh port (A port), returning to the engine. The working state of the battery circuit is as follows: the water from the battery enters the fourth electronic auxiliary water pump, flows out from the fourth electronic auxiliary water pump and enters the battery reservoir. After flowing out from the battery reservoir, it enters the battery cooler. After heat exchange, it flows out from the battery cooler and enters the battery through the third water temperature sensor.

[0086] like Figure 7As shown, if the current thermal management demand is the fifth thermal management demand, the refrigerant circuit, low temperature circuit, and heating circuit are working. The engine cooling circuit and generator circuit automatically open or close based on the demand. The battery circuit is not working. The fourth and fifth ports of the second three-way valve are connected, the first and second ports of the first three-way valve are connected, the seventh and eighth ports of the four-way valve are connected, the ninth and tenth ports are connected, the first refrigerant shut-off valve is closed, the second refrigerant shut-off valve is connected, and both the first and second refrigerant expansion valves are closed. The refrigerant circuit is as follows: The high-temperature and high-pressure refrigerant discharged from the electric compressor 1 enters the water-cooled condenser through the second refrigerant shut-off valve and exchanges heat with the heating circuit. After heat exchange, the refrigerant enters the electronic expansion valve. After throttling and depressurization by the electronic expansion valve, it enters the waste heat recovery unit to absorb the waste heat from the electric drive. After flowing out of the waste heat recovery unit, it passes through the condenser. After flowing out of the condenser, it passes through the first refrigerant expansion valve and the evaporator, and returns to the electric compressor 1. The low-temperature circuit works as follows: The water outlet of the low-temperature radiator enters the second electronic auxiliary water pump through the fourth water temperature sensor. After flowing out of the second electronic auxiliary water pump, it enters the electronic control unit, the rear electric drive unit, and the water-cooled intercooler respectively. After flowing out of the electronic control unit, the rear electric drive unit, and the water-cooled intercooler, it is combined into one channel and enters the second three-way valve. It enters from the fifth port (B port) and flows out from the fourth port (C port) of the second three-way valve, enters the waste heat recovery unit and exchanges heat with the refrigerant. After heat exchange, it flows out of the waste heat recovery unit. Returning to the low-temperature radiator; the low-temperature water reservoir filler pipe is connected to the second electronic auxiliary water pump, and the low-temperature radiator outlet is connected to the low-temperature water reservoir overflow port; the heating circuit is as follows: the antifreeze, after exchanging heat with the refrigerant in the water-cooled condenser, enters the first three-way valve, flows in from the first port (B port) of the first three-way valve, flows out from the second port (A port), enters the heater core, exchanges heat with the air inside the vehicle, flows out from the heater core after heat exchange, enters the third electronic auxiliary water pump, flows out from the third electronic auxiliary water pump, enters the four-way valve, flows in from the ninth port (D port) of the electronic four-way water valve, flows out from the tenth port (C port), and returns to the water-cooled condenser.

[0087] like Figure 8As shown, if the current thermal management demand is the sixth thermal management demand, the refrigerant circuit, low temperature circuit, heating circuit, and battery circuit will operate. The engine circuit and generator circuit will automatically open or close based on the demand. The fourth and fifth ports of the second three-way valve will be open, the first, second, and third ports of the first three-way valve will all be open, the seventh and eighth ports of the four-way valve will be connected and open, the ninth and tenth ports will be connected and open, the first refrigerant shut-off valve will be closed, the second refrigerant shut-off valve will be open, and both the first and second refrigerant expansion valves will be closed. The refrigerant circuit is as follows: The high-temperature and high-pressure refrigerant discharged from the electric compressor 1 enters the water-cooled condenser through the second refrigerant shut-off valve and exchanges heat with the heating circuit. After heat exchange, the refrigerant enters the electronic expansion valve. After throttling and depressurization by the electronic expansion valve, it enters the waste heat recovery unit to absorb the waste heat from the electric drive. After flowing out of the waste heat recovery unit, it passes through the condenser. After flowing out of the condenser, it passes through the first refrigerant expansion valve and the evaporator, and returns to the electric compressor 1. The low-temperature circuit works as follows: The water outlet of the low-temperature radiator enters the second electronic auxiliary water pump through the fourth water temperature sensor. After flowing out of the second electronic auxiliary water pump, it enters the electronic control unit, the rear electric drive unit, and the water-cooled intercooler respectively. After flowing out of the electronic control unit, the rear electric drive unit, and the water-cooled intercooler, it is combined into one channel and enters the second three-way valve. It enters from the fifth port (B port) and flows out from the fourth port (C port) of the second three-way valve, enters the waste heat recovery unit and exchanges heat with the refrigerant. After heat exchange, it flows out of the waste heat recovery unit. Returning to the low-temperature radiator; the low-temperature water reservoir filler pipe is connected to the second electronic auxiliary water pump, and the low-temperature radiator outlet is connected to the low-temperature water reservoir overflow port; the heating circuit is as follows: after exchanging heat with the refrigerant in the water-cooled condenser, the antifreeze enters the first three-way valve, flowing in from the first port (B port) of the first three-way valve, and flowing out from the second port (A port) and the third port (C port) respectively. The antifreeze flowing out from port A enters the heater core, exchanges heat with the air inside the vehicle, and flows out of the heater core after heat exchange. The antifreeze flowing out from port C enters the battery cooler, and then flows into the battery circuit. After heat exchange, the antifreeze flowing from the heater core and battery cooler is collected and enters the third electronic auxiliary water pump. After flowing out of the third electronic auxiliary water pump, it enters the four-way valve, flows in from the ninth port (D port) of the electronic four-way water valve, flows out from the tenth port (C port), and returns to the water-cooled condenser. The battery circuit is as follows: the water from the battery enters the fourth electronic auxiliary water pump, flows out from the fourth electronic auxiliary water pump and enters the battery reservoir, flows out from the battery reservoir and enters the battery cooler. After heat exchange, it flows out from the battery cooler and passes through the third water temperature sensor before entering the battery.

[0088] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 9As shown, the computer device includes one or more processors 40, memory 50, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 9 Take a processor 40 as an example.

[0089] Processor 40 may be a central processing unit, a network processor, or a combination thereof. Processor 40 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0090] The memory 50 stores instructions executable by at least one processor 40 to cause the at least one processor 40 to perform the method shown in the above embodiments.

[0091] The memory 50 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 50 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 50 may optionally include memory remotely located relative to the processor 40, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0092] The memory 50 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 50 may also include a combination of the above types of memory.

[0093] The computer device also includes an input device 60 and an output device 70. The processor 40, memory 50, input device 60, and output device 70 can be connected via a bus or other means. Figure 9 Taking the example of a connection between China and Israel via a bus.

[0094] Input device 60 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 70 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0095] This invention also provides a vehicle, such as... Figure 10 As shown, the vehicle includes a thermal management system and a controller, which executes the thermal management method of the above embodiments.

[0096] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0097] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A thermal management method, characterized in that, This system is applied to a thermal management system, which includes at least a heating circuit, a refrigerant circuit, a battery circuit, a first three-way valve, and a water-cooled condenser. The refrigerant circuit includes an electric compressor. The heating circuit and the refrigerant circuit are connected via the water-cooled condenser, which transfers heat from the high-temperature refrigerant emitted by the electric compressor in the refrigerant circuit to the heating circuit. The first port of the first three-way valve is connected to the heating circuit, the second port is connected to the passenger compartment's heating system, and the third port is connected to the battery circuit. This valve is used to adjust the connections between the heating circuit, the heating system, and the battery circuit. The thermal management system further includes an electric drive cooling circuit, a waste heat recovery unit, and a second three-way valve. The electric drive cooling circuit includes at least a low-temperature radiator, an electronic control unit, a rear electric drive, and a water-cooled intermediate cooler. The fourth port of the second three-way valve is connected to the refrigerant circuit via the waste heat recovery unit. The fifth port is located on the pipeline through which waste heat from the electronic control unit, the rear electric drive, and the water-cooled intermediate cooler flows. The sixth port is located at the inlet of the low-temperature radiator in the electric drive cooling circuit and is used to adjust the flow direction of the electric drive waste heat. The waste heat recovery unit is used to utilize the recovered electric drive waste heat to increase the refrigerant temperature. The thermal management system further includes an engine circuit and a four-way valve, wherein the seventh and eighth ports of the four-way valve are connected to the engine circuit, and the ninth and tenth ports are connected to the heating circuit, for adjusting the connection relationship between the engine circuit and the heating circuit. The method includes: It obtains the vehicle's current driving mode, battery status, and passenger compartment temperature. The battery temperature requirement is determined based on the battery's operating status, and the current thermal management requirements are determined based on the vehicle's current driving mode, the current battery temperature and the battery temperature requirement, as well as the relationship between the passenger compartment temperature and the user's temperature requirement for the passenger compartment. Based on the current thermal management requirements, the port conduction states of the first three-way valve, the second three-way valve, and the four-way valve are controlled to change the working state of the thermal management system in order to meet the current thermal management requirements.

2. The method according to claim 1, characterized in that, The thermal management system further includes a first refrigerant shut-off valve and a second refrigerant shut-off valve. The refrigerant circuit also includes a condenser and an electronic expansion valve. The first refrigerant shut-off valve is installed on the pipeline connecting the electric compressor and the waste heat recovery unit, and is used to control the refrigerant discharged by the electric compressor to enter the crew compartment cold air evaporator or battery circuit after passing through the electronic expansion valve and condenser. The second refrigerant shut-off valve is installed on the pipeline connecting the electric compressor and the water-cooled condenser, and is used to control the high-temperature refrigerant discharged from the electric compressor from entering the water-cooled condenser.

3. The method according to claim 1, characterized in that, The battery circuit includes at least a battery cooler and a battery, wherein, The first port of the first three-way valve is connected to the outlet of the water-cooled condenser, the second port is connected to the heating device in the crew compartment, and the third port is connected to the battery cooler in the battery circuit. The battery cooler is connected to the battery and is used to receive water flowing out of the battery, exchange heat with it, and then flow the water back into the battery.

4. The method according to claim 1, characterized in that, The engine circuit includes at least an engine and an electric main water pump, wherein, The seventh port of the four-way valve is connected to the engine outlet, the eighth port is connected to the engine inlet via the electronic main water pump, the ninth port is connected to the passenger compartment heating system, and the tenth port is connected to the inlet of the water-cooled condenser.

5. The method according to claim 2, characterized in that, The thermal management system further includes a first refrigerant expansion valve and a second refrigerant expansion valve. The battery circuit includes at least a battery cooler and a battery. The first refrigerant expansion valve is installed on the pipeline connecting the condenser and the crew compartment evaporator, and is used to control the refrigerant discharged from the condenser to enter the crew compartment evaporator. The second refrigerant expansion valve is installed on the pipeline connecting the battery cooler and the condenser. It is used to control the refrigerant discharged from the condenser to enter the battery cooler. The battery cooler is connected to the battery and is used to receive the water flowing out of the battery. After heat exchange, the water flows into the battery.

6. The method according to claim 1 or 3, characterized in that, The first three-way valve is a three-way proportional valve.

7. The method according to claim 5, characterized in that, The process of determining battery temperature requirements based on the battery's operating status, and determining current thermal management requirements based on the vehicle's current driving mode, battery temperature requirements, and the relationship between the passenger compartment temperature and the user's temperature requirements for the passenger compartment, includes: If the current battery temperature is within the required battery temperature range, but the current passenger compartment temperature is higher than the user's required passenger compartment temperature, then the current thermal management requirement is determined as the primary thermal management requirement for the refrigerant circuit to cool the passenger compartment, or... If the current battery is in a charging state, or the current battery temperature is higher than the required battery temperature range, and the current passenger compartment temperature is higher than the user's required passenger compartment temperature, then the current thermal management requirement is determined to be the second thermal management requirement for the refrigerant circuit to cool the passenger compartment and the battery, or... If the vehicle is currently in engine operating mode, and the current battery temperature is within the required battery temperature range, but the current passenger compartment temperature is lower than the user's desired passenger compartment temperature, then the current thermal management requirement is determined to be the third thermal management requirement: engine circuit heating of the passenger compartment. If the vehicle is currently in engine operating mode, the current battery temperature is below the required battery temperature range, and the current passenger compartment temperature is below the user's desired passenger compartment temperature, then the current thermal management requirement is determined to be the fourth thermal management requirement: heating of the passenger compartment and battery by the engine circuit. If the vehicle is currently in pure electric mode, and the current battery temperature is within the required range, but the current passenger compartment temperature is lower than the user's desired passenger compartment temperature, then the current thermal management requirement is determined to be the fifth thermal management requirement for refrigerant circuit heating of the passenger compartment, or... If the vehicle is currently in pure electric mode, the current battery temperature is below the required battery temperature range, and the current passenger compartment temperature is below the user's required passenger compartment temperature, then the current thermal management requirement is determined to be the sixth thermal management requirement for the refrigerant circuit to heat the passenger compartment and the battery.

8. The method according to claim 7, characterized in that, The control of the port conduction states of the first three-way valve, the second three-way valve, and the four-way valve based on the current thermal management requirements includes: If the current thermal management requirement is the first thermal management requirement or the second thermal management requirement, the fifth and sixth ports of the second three-way valve are opened, the first three-way valve is closed, and the four-way valve is closed. If the current thermal management requirement is the third thermal management requirement, control the fifth and sixth ports of the second three-way valve to be connected, the first and second ports of the first three-way valve to be connected, the seventh and ninth ports of the four-way valve to be connected, and the eighth and tenth ports to be connected. If the current thermal management requirement is the fourth thermal management requirement, the fifth and sixth ports of the second three-way valve are connected, the first, second, and third ports of the first three-way valve are all connected, the seventh and ninth ports of the four-way valve are connected, and the eighth and tenth ports are connected. If the current thermal management requirement is the fifth thermal management requirement, control the fourth and fifth ports of the second three-way valve to be connected, the first and second ports of the first three-way valve to be connected, the seventh and eighth ports of the four-way valve to be connected, and the ninth and tenth ports to be connected. If the current thermal management requirement is the sixth thermal management requirement, control the fourth and fifth ports of the second three-way valve to be open, the first, second, and third ports of the first three-way valve to be open, the seventh and eighth ports of the four-way valve to be open, and the ninth and tenth ports to be open.

9. The method according to claim 7, characterized in that, The method further includes: If the current thermal management demand is the first thermal management demand or the second thermal management demand, control the first refrigerant shut-off valve to open and the second refrigerant shut-off valve to close. If the current thermal management demand is the third or fourth thermal management demand, both the first and second refrigerant shut-off valves will be closed. If the current thermal management demand is the fifth or sixth thermal management demand, the first refrigerant shut-off valve is closed and the second refrigerant shut-off valve is opened.

10. The method according to claim 7 or 9, characterized in that, The method further includes: If the current thermal management demand is the primary thermal management demand, control the first refrigerant expansion valve to open and the second refrigerant expansion valve to close. If the current thermal management requirement is the second thermal management requirement, both the first and second refrigerant expansion valves will be turned on. If the current thermal management demand is the third, fourth, fifth, or sixth thermal management demand, control both the first and second refrigerant expansion valves to close.

11. A computer device, characterized in that, include: A memory and a processor are communicatively connected, the memory storing computer instructions, and the processor executing the computer instructions to perform the thermal management method according to any one of claims 1 to 10.

12. A vehicle, characterized in that, The vehicle includes a controller and a thermal management system, the controller being configured to perform the thermal management method according to any one of claims 1 to 10.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to perform the thermal management method according to any one of claims 1 to 10.

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