Heat management system, control method and electric vehicle of extended-range vehicle

Abstract

A heat management system of a range extended vehicle, a control method and an electric vehicle, the heat management system of the range extended electric vehicle comprising: a refrigerant circuit, an engine circuit, a battery circuit; the refrigerant circuit comprising an evaporator, the engine circuit comprising a warm core, the refrigerant circuit and the engine circuit exchanging heat through the evaporator and the warm core; the battery circuit and the refrigerant circuit comprising a battery cooler, the battery circuit and the refrigerant circuit exchanging heat through the battery cooler; the engine circuit and the motor circuit comprising an electronic thermostat, the battery circuit and the engine circuit exchanging heat through the electronic thermostat. The application realizes the range extended heat management of the battery vehicle by coupling the refrigerant circuit, the engine circuit and the battery circuit.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle technology, specifically relating to a thermal management system, control method, and electric vehicle for range-extended electric vehicles. Background Technology

[0002] With the development of the automotive industry, the demand for extended-range electric vehicles (REEVs) is increasing. REEVs make up for the high operating costs of traditional fuel vehicles, while also addressing the range anxiety and reliance on charging infrastructure issues of pure electric vehicles.

[0003] With the continuous development of range-extended electric vehicle technology, thermal management systems are becoming increasingly important. In traditional gasoline vehicles, the engine is usually the only source of heat for the passenger compartment. However, in range-extended electric vehicles, both the engine and the electric motor generate heat during operation. This heat can be collected and used to heat the passenger compartment and the battery, thereby improving energy efficiency.

[0004] Currently, there is no mature thermal management system for range-extended electric vehicles that can distribute the waste heat of the entire vehicle, meaning that the heat from the engine and motor is still not being fully utilized.

[0005] In the prior art, there are the following two solutions to this problem:

[0006] Method 1: Relying entirely on engine heat to heat the battery and passenger compartment, this method still suffers from the disadvantage of slow cold starts in traditional vehicles;

[0007] Method 2: The passenger compartment and battery are heated entirely by the refrigerant system or electric heaters. This method does not use the heat from the engine, resulting in a waste of energy for the entire vehicle and an increase in overall vehicle energy consumption.

[0008] Therefore, a more rational and advanced thermal management system is needed to maximize the use of energy by using engine heat sources and electric drive heat sources to heat the passenger compartment and battery, thereby improving the energy efficiency and driving range of the whole vehicle and maintaining battery performance. Summary of the Invention

[0009] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a thermal management system, control method and electric vehicle for range-extended vehicles, which at least solves one of the technical problems in the background art.

[0010] To achieve the above objectives, the present invention adopts the following technical solution.

[0011] The first aspect of this invention provides a thermal management system for a range-extended electric vehicle, comprising at least:

[0012] Refrigerant circuit, engine circuit, and battery circuit;

[0013] The refrigerant circuit includes an evaporator, and the engine circuit includes a heater core. The refrigerant circuit and the engine circuit exchange heat through the evaporator and the heater core.

[0014] The battery circuit and the refrigerant circuit together include a battery cooler, through which the battery circuit and the refrigerant circuit exchange heat.

[0015] The engine circuit and the motor circuit together include an electronic thermostat, through which the battery circuit and the engine circuit exchange heat.

[0016] In one embodiment of the present invention, the refrigerant circuit further includes a compressor, an outdoor heat exchanger, a liquid receiver, a first electronic expansion valve, a second electronic expansion valve, and a battery cooler; the first electronic expansion valve and the second electronic expansion valve are connected in parallel, and the second electronic expansion valve is connected in series with the battery cooler;

[0017] The refrigerant flowing out of the compressor passes through the outdoor heat exchanger and the liquid receiver, then flows into the first expansion valve and the second expansion valve respectively, and then flows into the evaporator through the first expansion valve and the battery cooler respectively, before returning to the compressor.

[0018] In one embodiment of the present invention, the engine circuit further includes an engine, a high-temperature radiator, a water heater, a first three-way valve, and a second three-way valve; the engine is connected in parallel with the high-temperature radiator and is sequentially connected to the heater core and the electronic thermostat via the first three-way valve and the second three-way valve pipelines.

[0019] In one embodiment of the present invention, in passenger cabin dehumidification mode, in extended range mode, the refrigerant circuit and engine circuit work together to dehumidify the passenger cabin, including removing water vapor from the passenger cabin through the evaporator in the refrigerant circuit and regulating the temperature of the passenger cabin through engine heat.

[0020] In one embodiment of the present invention, in passenger cabin heating mode, in range-extended mode, the heat generated by the engine is used to heat the passenger cabin via a heating core.

[0021] In one embodiment of the present invention, in battery heating mode, in range-extending mode, the heat generated by the engine is used to heat the battery via an electronic thermostat.

[0022] As one embodiment of the present invention, it further includes a motor circuit and a six-way valve, wherein the motor circuit selectively exchanges heat with the battery circuit via the six-way valve.

[0023] In one embodiment of the present invention, the motor circuit includes a motor and a cryogenic radiator connected in parallel. The liquid inlet of the motor is connected to the fifth port of the six-way valve via a pipeline, and the liquid inlet of the cryogenic radiator is connected to the sixth port of the six-way valve via a pipeline. The liquid outlets of the motor and the cryogenic radiator are combined and connected to the first port of the six-way valve via a pipeline.

[0024] In one embodiment of the present invention, the second port of the six-way valve is connected to the liquid inlet of the battery via a pipeline; the third port of the six-way valve is connected to the lower liquid inlet of the battery cooler via a pipeline; and the fourth port of the six-way valve is connected to the electronic thermostat via a pipeline.

[0025] A second aspect of the present invention provides a control method for an electric vehicle thermal management system based on the first aspect of the present invention, wherein the electric vehicle thermal management system comprises at least:

[0026] Refrigerant circuit, engine circuit, and battery circuit;

[0027] The refrigerant circuit includes an evaporator, and the engine circuit includes a heater core. The refrigerant circuit and the engine circuit exchange heat through the evaporator and the heater core.

[0028] The battery circuit and the refrigerant circuit together include a battery cooler, through which the battery circuit and the refrigerant circuit exchange heat.

[0029] The engine circuit and the motor circuit together include an electronic thermostat, through which the motor circuit and the engine circuit exchange heat.

[0030] A third aspect of the present invention provides an electric vehicle, comprising: a thermal management system for a range-extended electric vehicle as described in the first aspect of the present invention.

[0031] A fourth aspect of the present invention provides an electronic device, comprising: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores program instructions executable by the processor, and the processor invokes the program instructions to perform steps of the control method for an electric vehicle thermal management system as described in the second aspect of the present invention.

[0032] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0033] 1. This invention achieves range-extended thermal management for battery-powered vehicles by coupling the refrigerant circuit, engine circuit, and battery circuit. Compared with pure electric vehicles or fuel vehicles, this invention further improves energy utilization efficiency.

[0034] 2. This invention enables the heating of the passenger cabin and battery by engine heat and motor heat under different mode combinations, thereby maximizing energy utilization. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the composition of a thermal management system for a range-extended electric vehicle in one embodiment of the present invention.

[0037] Figure 2 This is a schematic diagram of the extended range of the passenger cabin heating mode in one embodiment of the present invention.

[0038] Figure 3 This is a schematic diagram of the passenger cabin heating mode in pure electric state in one embodiment of the present invention.

[0039] Figure 4 This is a schematic diagram of the extended range of the passenger cabin cooling mode in one embodiment of the present invention.

[0040] Figure 5 This is a schematic diagram of the passenger cabin cooling mode in pure electric state in one embodiment of the present invention.

[0041] Figure 6 This is a schematic diagram of the extended range of the passenger cabin dehumidification mode in one embodiment of the present invention.

[0042] Figure 7 This is a schematic diagram of the passenger cabin dehumidification mode in pure electric state in one embodiment of the present invention.

[0043] Figure 8 This is a schematic diagram of the battery heating mode range extension state in one embodiment of the present invention.

[0044] Figure 9 This is a schematic diagram of the battery heating mode in pure electric state in one embodiment of the present invention.

[0045] Figure 10 This is a schematic diagram of the battery cooling mode range extension state in one embodiment of the present invention.

[0046] Figure 11 This is a schematic diagram of the battery cooling mode in pure electric state in one embodiment of the present invention.

[0047] Figure 12This is a schematic diagram of the battery air-cooled range-extending state in one embodiment of the present invention.

[0048] Figure 13 This is a schematic diagram of the battery operating in pure electric mode in one embodiment of the present invention.

[0049] Figure 14 This is a schematic diagram of the operation of the electric drive cooling mode range extension state in one embodiment of the present invention.

[0050] Figure 15 This is a schematic diagram of the operation of the electric drive cooling mode in pure electric state in one embodiment of the present invention.

[0051] Figure 16 This is a schematic diagram of the operation of the motor heating battery mode in pure electric state in one embodiment of the present invention.

[0052] Figure 17 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0053] Figure Labels

[0054] 1-Compressor; 2-Outdoor heat exchanger (OHX); 3-Liquid receiver (RD); 4-First electronic expansion valve (wherein electronic expansion valve: EXV); 5-Second electronic expansion valve (wherein electronic expansion valve: EXV);

[0055] 6- Battery cooler (Chiller); 7- Evaporator (EVAP); 8- Engine; 9- High-temperature radiator (HTR); 10- Water heater (WPTC);

[0056] 11-First water pump; 12-First three-way valve; 13-Second three-way valve; 14-Second water pump; 15-Heating core (H / C);

[0057] 16-Electronic thermostat; 17-Battery (ESS); 18-Motor (EDS); 19-Low Temperature Radiator (LTR); 20-Six-way valve; 21-Third water pump; 22-Fourth water pump. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application.

[0059] It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment in the following embodiments have their own emphasis; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0060] like Figure 1 As shown, the first aspect of the present invention provides a thermal management system for a range-extended electric vehicle, comprising at least:

[0061] Refrigerant circuit, engine circuit, and battery circuit;

[0062] The refrigerant circuit and the engine circuit exchange heat through the evaporator 7 and the heating element 15;

[0063] The battery circuit and the refrigerant circuit exchange heat via the battery cooler 6.

[0064] The battery circuit and the engine circuit exchange heat via an electronic thermostat 16.

[0065] This invention achieves range-extended thermal management for battery electric vehicles by coupling the refrigerant circuit, engine circuit, and battery circuit. Compared with pure electric vehicles or fuel vehicles, this invention improves energy utilization efficiency and overcomes the shortcomings of existing electric vehicle thermal management in terms of heat utilization.

[0066] In this invention, the refrigerant circuit includes a compressor 1, an outdoor heat exchanger 2, a liquid receiver 3, a first electronic expansion valve 4, a second electronic expansion valve 5, a battery cooler 6, and an evaporator 7; wherein the first electronic expansion valve 4 and the second electronic expansion valve 5 are connected in parallel, and the second electronic expansion valve 5 is connected in series with the battery cooler 6.

[0067] After the compressor 1 is connected to the outdoor heat exchanger 2 and the liquid storage tank 3 in sequence via pipelines, the refrigerant flowing out of the liquid storage tank 3 flows into the first expansion valve 4 and the second expansion valve 5 respectively, and flows into the evaporator 7 through the liquid outlet end of the first expansion valve 4 and the upper liquid outlet end of the battery cooler 6 respectively, and then returns to the compressor 1. Based on this method, the flow of refrigerant in the refrigerant circuit is realized.

[0068] Specifically, each battery cooler 6 has two liquid outlets and corresponding liquid inlets, including an upper liquid outlet, a lower liquid outlet, an upper liquid inlet, and a lower liquid inlet. The refrigerant circuit uses the upper liquid outlet and the upper liquid inlet to achieve the flow of refrigerant, while the battery circuit uses the lower liquid inlet and the upper liquid inlet to achieve the flow of coolant to the battery.

[0069] In this invention, the engine circuit includes an engine 8, a high-temperature radiator 9, a water heater 10, a first water pump 11, a first three-way valve 12, a second three-way valve 13, a second water pump 14, a heater core 15, and an electronic thermostat 16. The engine 8 is connected in parallel with the first water pump 11, and together with the high-temperature radiator 9. The parallel pipelines converge at the first three-way valve 12 and sequentially pass through the second three-way valve 13 and the second water pump 14 before connecting to the heater core 15. The heater core 15 is connected to the electronic thermostat 16 via a pipeline. The lower outlet of the electronic thermostat 16 is connected via a pipeline between the pipelines connecting the second three-way valve 13 and the second water pump 14.

[0070] Specifically, the heating element 15 and the evaporator 7 can serve to cool, heat and / or dehumidify the passenger cabin.

[0071] Specifically, a temperature sensor is present on the first three-way valve 12. The purpose of the temperature sensor is to measure the engine coolant temperature. When the engine coolant temperature is very high (e.g., >70°C), a portion of the water enters the HTR radiator to cool the engine. When the engine coolant temperature is low (e.g., ≤70°C), all water is prevented from entering the HTR radiator for cooling, and instead enters the H / C to heat the passenger compartment or heat the engine itself (engine cold start accelerates the rise in engine temperature).

[0072] Specifically, in the connection relationship of the engine circuit in this invention, the first port of the first three-way valve 12 is connected to the first port of the second three-way valve 13, the second port of the first three-way valve 12 is connected to the high-temperature radiator 9, and the third port of the first three-way valve 12 is connected to the outlet of the first water pump 11; the first port of the second three-way valve 13 is connected to the first port of the first three-way valve 12, the second port of the second three-way valve 13 is directly connected to the pipeline and merges with the pipeline connected from the right end of the engine 8, the third port of the second three-way valve 13 is connected to the pipeline, and the pipeline connected to the third port is connected to the pipeline connected to the inlet of the second water pump 14, thus realizing the convergence of three pipelines from the pipeline connected from the right end of the engine 8.

[0073] In one embodiment of the present invention, the battery circuit includes a battery cooler 6, a battery 17, and a third water pump 21.

[0074] In one embodiment of the present invention, the motor circuit includes a motor 18, a low-temperature radiator 19, and a fourth water pump 22;

[0075] In one embodiment of the present invention, the motor circuit selectively exchanges heat with the battery circuit via a six-way valve 20.

[0076] Specifically, the first port of the six-way valve 20 is connected via a pipeline to the confluence pipeline of the liquid outlet of the motor 18 and the cryogenic radiator 19; the second port of the six-way valve 20 is connected via a pipeline of the third water pump 21 to the battery 17; the third port of the six-way valve 20 is connected via a pipeline of the lower liquid inlet of the battery cooler 6; the fourth port of the six-way valve 20 is connected via a pipeline of the electronic thermostat 16; the fifth port of the six-way valve 20 is connected via a pipeline of the fourth water pump 22 to the motor 18; and the sixth port of the six-way valve 20 is connected via a pipeline of the cryogenic radiator 19.

[0077] Specifically, in this invention, in the battery circuit, the battery 17 and the electronic thermostat 16 are directly connected for heat exchange between the engine circuit and the battery circuit. In addition, the electronic cooler 6, which is connected to the third port of the six-way valve 20, is connected in parallel with the battery 17. The lower outlet of the electronic cooler 6 is connected to the pipeline between the battery 17 and the electronic cooler 6 via a pipeline to achieve coupling between the refrigerant circuit, the battery circuit, and the engine circuit.

[0078] All components in the accompanying drawings of this invention are schematic diagrams only and do not represent the actual dimensions and positions of the components.

[0079] like Figures 2-16 As shown, this invention illustrates the protection provided by the thermal management system for range-extended electric vehicles by comparing two states: pure electric and range-extended. In some of the accompanying drawings, different pipe colors represent different meanings. Specifically, orange represents the high-temperature water circuit, with key components including the engine, HTR, WPTC, H / C, and water-to-water heat exchanger; blue represents the refrigerant circuit, with key components including the compressor, OHX, EXV, EVAP, and chiller; and green represents the low-temperature water circuit, with key components including ESS, LTR, EDS, and a six-way valve. The accompanying drawings provided in this invention can supplement and explain the embodiments of this invention. Those skilled in the art, upon understanding the contents of the accompanying drawings, can fully understand and implement this invention.

[0080] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, in the passenger cabin heating mode, in the range-extended state, the heat generated by the engine 8 is used to heat the passenger cabin through the heating core 15; in the pure electric state, the passenger cabin is heated only through the water heater 10, and the passenger cabin heating effect is better in the range-extended state.

[0081] like Figure 4 and Figure 5As shown, in one embodiment of the present invention, in the passenger cabin cooling mode, in the extended range state, the passenger cabin is cooled by both the refrigerant circuit and the engine circuit, including removing the heat from the heating core 15 through the evaporator 7 in the refrigerant circuit and the high-temperature radiator 9 in the engine circuit; in the pure electric state, the passenger cabin is cooled only by the evaporator 7 in the refrigerant circuit. It can be seen that the passenger cabin cooling effect is better in the extended range state.

[0082] like Figure 6 and Figure 7 As shown, in one embodiment of the present invention, in the passenger cabin dehumidification mode, in the extended range state, the refrigerant circuit and the engine circuit jointly dehumidify the passenger cabin, including removing water vapor from the passenger cabin through the evaporator 7 in the refrigerant circuit and regulating the temperature of the passenger cabin through engine heat; in the pure electric state, the evaporator 7 in the refrigerant circuit removes water vapor from the passenger cabin and regulates the temperature of the passenger cabin through WPTC electric heating. It can be seen that the thermal management energy consumption is better in the extended range state, and the passenger cabin cooling effect is better in the extended range state.

[0083] like Figure 8 and Figure 9 As shown, in one embodiment of the present invention, in the battery heating mode, in the range-extending state, the heat generated by the engine 8 heats the battery 17 through the electronic thermostat 16; in the pure electric state, the battery 17 is heated only through the water heater 10. It can be seen that the battery 17 is heated better in the range-extending state.

[0084] like Figure 10 and Figure 11 As shown, in one embodiment of the present invention, in the battery cooling mode, in the range-extending state, the first electronic expansion valve in the refrigerant circuit may not participate in the operation, and the battery cooling is achieved by the battery cooler 6 in the refrigerant circuit and the high-temperature radiator 9 in the engine circuit exchanging heat with the battery to cool the battery 17; in the pure electric state, the battery 17 is cooled only by the battery cooler 6 in the refrigerant circuit. It can be seen that the cooling effect of the battery 17 is better in the range-extending state.

[0085] Specifically, the battery cooling mode is water-cooled, and it also includes air-cooled mode. Battery cooling refers to the battery heat being carried away by the refrigerant through the chiller, which requires the compressor to start the cooling cycle; battery air cooling refers to the battery heat being dissipated to the environment through hot water entering the LTR, without requiring the compressor to start and do additional work.

[0086] like Figure 12 and Figure 13As shown, in one embodiment of the present invention, in the battery air-cooled mode, in the range-extended state, the battery cooler 6 in the refrigerant circuit, the high-temperature radiator 9 in the engine circuit, and the motor circuit work together to achieve heat exchange with the battery 17. The motor circuit exchanges heat with the battery circuit through the second, third, fifth, and sixth ports of the six-way valve 20. In the pure electric state, the battery 17 is cooled only by the battery cooler 6 in the refrigerant circuit and the motor circuit. It can be seen that the air-cooling effect of the battery 17 is better in the range-extended state.

[0087] like Figure 14 and Figure 15 As shown, in one embodiment of the present invention, in the electric drive cooling mode, in the range-extended state, the electric drive cooling is achieved by heat exchange between the high-temperature radiator 9 in the engine circuit and the low-temperature radiator 19 in the motor circuit and the motor 18; in the pure electric state, the electric drive cooling is achieved only through the low-temperature radiator 19 in the motor circuit. It can be seen that the electric drive cooling effect is better in the range-extended state.

[0088] In the motor-heated battery mode, during range extension, the engine will start, and the waste heat of the engine can be used to heat the battery directly.

[0089] like Figure 16 As shown, in one embodiment of the present invention, in the motor heating battery mode, under pure electric conditions, in the motor circuit, the coolant achieves motor heating circulation through the fourth water pump 22, the motor 18, the first port of the six-way valve 20, the second port of the six-way valve 20, the third water pump 21, the battery 17, the battery cooler 6, the third port of the six-way valve 20, and the fifth port of the six-way valve 20.

[0090] Based on this, the electric vehicle thermal management system protected by this invention integrates the contradictions existing in the prior art. By integrating various circuits, this invention achieves effective thermal management of the engine and motor for the passenger compartment and battery, and realizes comprehensive utilization of the vehicle's energy. Under different mode combinations, it can realize the heating of the passenger compartment and battery by the engine heat and motor heat, thereby maximizing the utilization of energy.

[0091] It should be noted that the various modes involved in this invention, such as passenger cabin heating mode, passenger cabin cooling mode, passenger cabin dehumidification mode, battery heating mode, battery cooling mode, battery air cooling mode, electric drive cooling mode, and motor heating battery mode, can all be determined or obtained through existing sensor data. This invention is not limited to specific data obtained through sensors such as temperature and humidity sensors. This invention is also applicable to differentiating and applying modes by means of season, region, latitude, etc., and the above improvements are still within the scope of protection of this invention.

[0092] It should be noted that the loop method and accompanying drawings of the range-extended thermal management system shown in this invention have clearly disclosed the role and effect of each component in different thermal management requirements. Those skilled in the art who are familiar with the technical solutions provided by this invention should be aware that simple stacking, modification, addition or deletion of components should fall within the scope of protection of this invention.

[0093] A second aspect of the present invention provides a control method based on any one of the above-mentioned electric vehicle thermal management systems, wherein the electric vehicle thermal management system comprises:

[0094] Refrigerant circuit, engine circuit, battery circuit;

[0095] The refrigerant circuit includes an evaporator, and the engine circuit includes a heater core. The refrigerant circuit and the engine circuit exchange heat through the evaporator and the heater core.

[0096] The battery circuit and the refrigerant circuit together include a battery cooler, through which the battery circuit and the refrigerant circuit exchange heat.

[0097] The engine circuit and the motor circuit together include an electronic thermostat, through which the motor circuit and the engine circuit exchange heat.

[0098] A third aspect of the present invention provides an electric vehicle, including a range-extended electric vehicle thermal management system as described in any of the preceding claims.

[0099] like Figure 17 As shown, a fourth aspect of the present invention provides an electronic device, comprising:

[0100] At least one processor; and at least one memory communicatively connected to the processor, wherein the memory stores program instructions executable by the processor, and the processor invokes the program instructions to perform the steps of the method as described in any of the above embodiments.

[0101] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0102] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a system including a processing module or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0103] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management system for a range-extended electric vehicle, characterized in that, At least including: Refrigerant circuit, engine circuit, battery circuit, motor circuit, and six-way valve; The refrigerant circuit includes an evaporator, and the engine circuit includes a heater core. The refrigerant circuit and the engine circuit exchange heat through the evaporator and the heater core. The battery circuit and the refrigerant circuit together include a battery cooler, through which the battery circuit and the refrigerant circuit exchange heat. The engine circuit and the battery circuit together include an electronic thermostat, and the battery circuit and the engine circuit exchange heat through the electronic thermostat; The motor circuit selectively exchanges heat with the battery circuit via a six-way valve; the motor circuit includes a motor connected in parallel and a low-temperature radiator; wherein: The outlets of the motor and the cryogenic radiator converge and are connected via a pipeline to the first port of the six-way valve; the second port of the six-way valve is connected via a pipeline to the inlet of the battery; the third port of the six-way valve is connected via a pipeline to the lower inlet of the battery cooler; the fourth port of the six-way valve is connected via a pipeline to the electronic thermostat; the inlet of the motor is connected via a pipeline to the fifth port of the six-way valve; and the inlet of the cryogenic radiator is connected via a pipeline to the sixth port of the six-way valve.

2. The thermal management system for a range-extended electric vehicle according to claim 1, characterized in that, The refrigerant circuit also includes a compressor, an outdoor heat exchanger, a liquid receiver, a first electronic expansion valve, a second electronic expansion valve, and a battery cooler; the first electronic expansion valve and the second electronic expansion valve are connected in parallel, and the second electronic expansion valve is connected in series with the battery cooler; The refrigerant flowing out of the compressor passes through the outdoor heat exchanger and the liquid receiver, then flows into the first expansion valve and the second expansion valve respectively, and then flows into the evaporator through the first expansion valve and the battery cooler respectively, before returning to the compressor.

3. The thermal management system for a range-extended electric vehicle according to claim 1, characterized in that, The engine circuit also includes an engine, a high-temperature radiator, a water heater, a first three-way valve, and a second three-way valve; the engine is connected in parallel with the high-temperature radiator and is sequentially connected to the heater core and the electronic thermostat via the first three-way valve and the second three-way valve pipeline.

4. The thermal management system for a range-extended electric vehicle according to claim 3, characterized in that, In passenger cabin dehumidification mode, in extended range mode, the refrigerant circuit and engine circuit work together to dehumidify the passenger cabin, including removing moisture from the passenger cabin through the evaporator in the refrigerant circuit and regulating the temperature of the passenger cabin through engine heat.

5. The thermal management system for a range-extended electric vehicle according to claim 3, characterized in that, In passenger cabin heating mode, in range-extended mode, the heat generated by the engine is used to heat the passenger cabin via the heating core.

6. The thermal management system for a range-extended electric vehicle according to claim 3, characterized in that, In battery heating mode, during range-extending operation, the heat generated by the engine is used to heat the battery via an electronic thermostat.

7. A control method for an electric vehicle thermal management system, characterized in that, Applied to the electric vehicle thermal management system as described in claim 1.

8. An electric vehicle, characterized in that, include: The range-extended electric vehicle thermal management system as described in any one of claims 1-6.

9. An electronic device, characterized in that, include: At least one processor; And at least one memory communicatively connected to the processor, wherein: the memory stores program instructions executable by the processor, and the processor can execute the steps of the control method of the electric vehicle thermal management system as described in claim 7 by calling the program instructions.

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