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

Abstract

The invention discloses a thermal management system and a control method of an extended-range vehicle and an electric vehicle. The thermal management system of the extended-range vehicle comprises a refrigerant loop, an engine loop and a battery loop, the refrigerant loop comprises an evaporator, the engine loop comprises a warm core, and the refrigerant loop and the engine loop exchange heat through the evaporator and the warm core; the battery loop and the refrigerant loop jointly comprise a battery cooler, and heat exchange is carried out between the battery loop and the refrigerant loop through the battery cooler; the engine loop and the motor loop jointly comprise an electronic thermostat, and heat exchange is conducted between the battery loop and the engine loop through the electronic thermostat. According to the invention, the refrigerant loop, the engine loop and the battery loop are coupled, so that the extended-range thermal management of the battery automobile is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and specifically relates to a thermal management system, a control method and an electric vehicle for an extended-range vehicle. Background Art

[0002] With the development of the automobile industry, the demand for extended-range electric vehicles (REEV) is increasing. Extended-range electric vehicles make up for the high driving cost of traditional fuel vehicles, while also making up for the range anxiety and dependence on charging facilities of pure electric vehicles.

[0003] With the continuous development of extended-range electric vehicle technology, thermal management systems have become increasingly important. In traditional fuel vehicles, usually only the engine is relied on to provide heat for the passenger compartment, while the engine and motor in extended-range electric vehicles will generate heat when running, which can be collected and used to heat the passenger compartment and battery to improve energy efficiency.

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

[0005] In the prior art, there are two solutions to this problem: Method 1: Relying entirely on engine heat to heat the battery and passenger compartment, this method still has the disadvantage of slow cold start of traditional vehicles; Method 2: Relying entirely on the refrigerant system or electric heater to heat the passenger compartment and the battery. This method does not use the heat of the engine, resulting in energy waste for the entire vehicle and increasing the energy consumption of the entire vehicle.

[0006] Therefore, a more reasonable and advanced thermal management system is needed to enable the engine heat source and electric drive heat source to heat the passenger compartment and battery to maximize energy utilization, improve the energy efficiency and cruising range of the entire vehicle, and maintain battery performance. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a thermal management system, a control method and an electric vehicle for an extended-range vehicle, which at least solve one technical problem in the above-mentioned background technology.

[0008] To achieve the above purpose, the present invention adopts the following technical solution.

[0009] A first aspect of the present invention provides a thermal management system for an extended-range electric vehicle, comprising at least: Refrigerant circuit, engine circuit and battery circuit; The refrigerant circuit includes an evaporator, the engine circuit includes a heater core, and the refrigerant circuit and the engine circuit exchange heat via the evaporator and the heater core; The battery circuit and the refrigerant circuit jointly include a battery cooler, and heat is exchanged between the battery circuit and the refrigerant circuit via the battery cooler; The engine circuit and the motor circuit jointly include an electronic thermostat, and heat is exchanged between the battery circuit and the engine circuit via the electronic thermostat.

[0010] As an embodiment of the present invention, the refrigerant circuit further includes a compressor, an outdoor heat exchanger, a liquid storage tank, a first electronic expansion valve, a second electronic expansion valve and a battery cooler; the first electronic expansion valve is connected in parallel with the second electronic expansion valve, 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 storage tank, and 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, and then returns to the compressor again.

[0011] As an embodiment of the present invention, 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 through the first three-way valve and the second three-way valve pipelines.

[0012] As an embodiment of the present invention, in the passenger compartment dehumidification mode, in the extended range state, the refrigerant circuit and the engine circuit jointly dehumidify the passenger compartment, including removing water vapor from the passenger compartment through the evaporator in the refrigerant circuit and regulating the temperature of the passenger compartment through the engine heat.

[0013] As an embodiment of the present invention, in the passenger compartment heating mode, in the range-extending state, the heat generated by the engine is used to heat the passenger compartment via the heater core.

[0014] As an embodiment of the present invention, in the battery heating mode, in the range-extending state, the heat generated by the engine heats the battery via the electronic thermostat.

[0015] As an embodiment of the present invention, it further includes a motor circuit and a six-way valve, and the motor circuit selectively exchanges heat with the battery circuit via the six-way valve.

[0016] As an embodiment of the present invention, the motor circuit includes a motor and a low-temperature radiator connected in parallel, the liquid inlet end of the motor is connected to the fifth port of the six-way valve via a pipeline, the liquid inlet end of the low-temperature radiator is connected to the sixth port of the six-way valve via a pipeline, and the liquid outlet ends of the motor and the low-temperature radiator are merged and connected to the first port of the six-way valve via a pipeline.

[0017] As an embodiment of the present invention, the second port of the six-way valve is connected to the liquid inlet end of the battery via a pipeline; the third port of the six-way valve is connected to the lower liquid inlet end of the battery cooler via a pipeline; the fourth port of the six-way valve is connected to the electronic thermostat via a pipeline.

[0018] The second aspect of the present invention provides a control method of the electric vehicle thermal management system based on the first aspect of the present invention, the electric vehicle thermal management system at least comprising: Refrigerant circuit, engine circuit and battery circuit; The refrigerant circuit includes an evaporator, the engine circuit includes a heater core, and the refrigerant circuit and the engine circuit exchange heat via the evaporator and the heater core; The battery circuit and the refrigerant circuit jointly include a battery cooler, and heat is exchanged between the battery circuit and the refrigerant circuit via the battery cooler; The engine circuit and the motor circuit jointly include an electronic thermostat, and heat is exchanged between the motor circuit and the engine circuit via the electronic thermostat.

[0019] A third aspect of the present invention provides an electric vehicle, comprising: a thermal management system for an extended-range electric vehicle as described in the first aspect of the present invention.

[0020] The 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 calls the program instructions to execute the steps of the control method of the electric vehicle thermal management system as described in the second aspect of the present invention.

[0021] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects: 1. The present invention realizes extended-range thermal management for battery vehicles by coupling between the refrigerant circuit, the engine circuit and the battery circuit. Compared with pure electric vehicles or fuel vehicles, the present invention further improves the energy utilization efficiency; 2. The present invention realizes heating of the passenger compartment and the battery by the heat of the engine and the motor under different mode combinations, thereby maximizing the utilization of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the composition of a thermal management system of an extended-range electric vehicle in one embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the operation of the extended-range state of the passenger compartment heating mode in one embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the operation of the passenger compartment heating mode in a pure electric state in one embodiment of the present invention.

[0026] Figure 4 It is a schematic diagram of the operation in the extended range state of the passenger compartment cooling mode in one embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the operation of the passenger compartment cooling mode in a pure electric state in one embodiment of the present invention.

[0028] Figure 6 It is a schematic diagram of the operation of the extended-range state of the passenger compartment dehumidification mode in one embodiment of the present invention.

[0029] Figure 7 It is a schematic diagram of the operation of the passenger compartment dehumidification mode in a pure electric state in one embodiment of the present invention.

[0030] Figure 8 It is a schematic diagram of the operation of the battery heating mode extended range state in one embodiment of the present invention.

[0031] Fig. 9 It is a schematic diagram of the operation of the battery heating mode in a pure electric state in one embodiment of the present invention.

[0032] Fig.10 It is a schematic diagram of the operation of the battery cooling mode extended range state in one embodiment of the present invention.

[0033] Fig.11 It is a schematic diagram of the operation of the battery cooling mode in a pure electric state in one embodiment of the present invention.

[0034] Fig.12 It is a schematic diagram of the operation of the battery air cooling mode extended range state in one embodiment of the present invention.

[0035] Fig.13It is a schematic diagram of the operation of the battery air cooling mode in a pure electric state in one embodiment of the present invention.

[0036] Fig.14 It is a schematic diagram of the operation of the extended range state of the electric drive cooling mode in one embodiment of the present invention.

[0037] Fig.15 It is a schematic diagram of the operation of the electric drive cooling mode in a pure electric state in one embodiment of the present invention.

[0038] Fig.16 It is a schematic diagram of the operation of the motor heating battery mode in a pure electric state in one embodiment of the present invention.

[0039] Fig.17 FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

[0040] Reference numerals 1-compressor; 2-outdoor heat exchanger (OHX); 3-liquid storage tank (RD); 4-first electronic expansion valve (electronic expansion valve: EXV); 5-second electronic expansion valve (electronic expansion valve: EXV); 6-Battery cooler (Chiller); 7-Evaporator (EVAP); 8-Engine; 9-High temperature radiator (HTR); 10-Water heater (WPTC); 11-first water pump; 12-first three-way valve; 13-second three-way valve; 14-second water pump; 15-heating core (H / C); 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 DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0042] It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In addition, in the following embodiments, the description of each embodiment has its own emphasis, and for parts not described in detail in one embodiment, reference can be made to the relevant description of other embodiments.

[0043] like Figure 1As shown, the first aspect of the present invention provides a thermal management system for an extended-range electric vehicle, comprising at least: Refrigerant circuit, engine circuit and battery circuit; The refrigerant circuit and the engine circuit exchange heat via the evaporator 7 and the heater core 15; The battery circuit and the refrigerant circuit exchange heat via the battery cooler 6; The battery circuit and the engine circuit exchange heat via the electronic thermostat 16 .

[0044] The present invention realizes extended-range thermal management for battery vehicles by coupling between the refrigerant circuit, the engine circuit and the battery circuit. Compared with pure electric vehicles or fuel vehicles, the present invention improves the energy utilization efficiency and improves the heat utilization disadvantages of existing electric vehicle thermal management.

[0045] In the present invention, the refrigerant circuit includes a compressor 1, an outdoor heat exchanger 2, a liquid storage tank 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 is connected in parallel with the second electronic expansion valve 5, and the second electronic expansion valve 5 is connected in series with the battery cooler 6; After the compressor 1 is connected to the outdoor heat exchanger 2 and the liquid storage tank 3 in sequence through 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 again. Based on this method, the flow of refrigerant in the refrigerant circuit is realized.

[0046] 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 realize the flow of the refrigerant, and the battery circuit uses the lower liquid inlet and the upper liquid inlet to realize the flow of the coolant at the battery end.

[0047] In the present 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 is also connected in parallel with the high-temperature radiator 9. The parallel pipelines are merged to the first three-way valve 12 and are sequentially connected to the heater core 15 through the second three-way valve 13 and the second water pump 14. The heater core 15 is connected to the electronic thermostat 16 through a pipeline, and the lower liquid outlet of the electronic thermostat 16 is connected to the pipeline between the second three-way valve 13 and the second water pump 14 through a pipeline.

[0048] Specifically, the heater core 15 and the evaporator 7 can serve the cooling, heating and / or dehumidification of the passenger compartment.

[0049] Specifically, there is a temperature sensor on the first three-way valve 12. The purpose of the temperature sensor is to measure the engine water temperature. When the engine water temperature is very high (for example, >70°C), a portion of the water enters the HTR radiator to cool the engine. When the engine water temperature is low (for example, ≤70°C), all the water is controlled not to enter the HTR for heat dissipation, and enters the H / C to heat the passenger compartment or heat the engine itself (cold start of the engine accelerates the rise of engine temperature).

[0050] Specifically, in the present invention, in the connection relationship of the engine circuit, 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 liquid outlet end 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 side 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 liquid inlet end of the second water pump 14, and the three pipelines are connected from the pipeline connected at the right side end of the engine 8.

[0051] In one embodiment of the present invention, the battery circuit includes a battery cooler 6 , a battery 17 and a third water pump 21 .

[0052] 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;

[0053] In one embodiment of the present invention, the motor circuit selectively exchanges heat with the battery circuit via the six-way valve 20 .

[0054] Specifically, the first port of the six-way valve 20 is connected to the converging pipeline of the liquid outlet ends of the motor 18 and the low-temperature radiator 19 via a pipeline; the second port of the six-way valve 20 is connected to the pipeline of the battery 17 via the third water pump 21; the third port of the six-way valve 20 is connected to the pipeline of the lower liquid inlet end of the battery cooler 6; the fourth port of the six-way valve 20 is connected to the pipeline of the electronic thermostat 16; the fifth port of the six-way valve 20 is connected to the pipeline of the motor 18 via the fourth water pump 22; and the sixth port of the six-way valve 20 is connected to the pipeline of the low-temperature radiator 19.

[0055] Specifically, in the present 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 connected to the third port of the six-way valve 20 is in parallel with the battery 17, and the lower liquid outlet end 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 among the refrigerant circuit, the battery circuit and the engine circuit.

[0056] All components in the drawings of the present invention are only schematic diagrams and do not represent the sizes and positions of actual components.

[0057] like Figure 2-Figure 16 As shown, the present invention expresses the content to be protected by the thermal management system of the extended-range electric vehicle in the present invention by comparing the two states of pure electric state and extended-range state. Among them, in some figures, different pipe colors represent different meanings. Among them, in the figures, orange represents the high-temperature water circuit, and the main parts include the engine, HTR, WPTC, H / C, and water-to-water heat exchanger; blue represents the refrigerant circuit, and the main parts include the compressor, OHX, EXV, EVAP, and Chiller; the green circuit represents the low-temperature water circuit, and the main parts include ESS, LTR, EDS, and six-way valve. The parts of the drawings shown in the present invention can be used as a supplement and explanation of the embodiments of the present invention. Those skilled in the art can fully understand and implement the present invention on the premise of knowing the contents of the drawings of the present invention.

[0058] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, in the passenger compartment heating mode, in the extended-range state, the heat generated by the engine 8 is used to heat the passenger compartment via the heater core 15; in the pure electric state, the passenger compartment is heated only by the water heater 10, and the passenger compartment heating effect is better in the extended-range state.

[0059] like Figure 4 and Figure 5 As shown, in one embodiment of the present invention, in the passenger compartment cooling mode, in the extended-range state, the refrigerant circuit and the engine circuit jointly cool the passenger compartment, including taking away the heat of the warm 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 compartment is cooled only by the evaporator 7 in the refrigerant circuit. It can be seen that the passenger compartment cooling effect is better in the extended-range state.

[0060] like Figure 6 and Figure 7As shown, in one embodiment of the present invention, in the passenger compartment dehumidification mode, in the extended-range state, the refrigerant circuit and the engine circuit jointly dehumidify the passenger compartment, including removing water vapor from the passenger compartment through the evaporator 7 in the refrigerant circuit, and regulating the temperature of the passenger compartment through the engine heat; in the pure electric state, the water vapor from the passenger compartment is removed by the evaporator 7 in the refrigerant circuit, and the temperature of the passenger compartment is regulated by the WPTC electric heating heat; it can be seen that the thermal management energy consumption is better in the extended-range state, and the passenger compartment cooling effect is better in the extended-range state.

[0061] like Figure 8 and Fig. 9 As shown, in one embodiment of the present invention, in the battery heating mode, in the extended-range state, the heat generated by the engine 8 is used to heat the battery 17 via the electronic thermostat 16; in the pure electric state, the battery 17 is heated only by the water heater 10. It can be seen that the heating effect of the battery 17 is better in the extended-range state.

[0062] like Fig.10 and Fig.11 As shown, in one embodiment of the present invention, in the battery cooling mode, in the extended-range state, the first electronic expansion valve in the refrigerant circuit may not be involved in the work, and the battery cooling is performed 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 in the extended-range state is better.

[0063] Specifically, the battery cooling mode is a water cooling mode, and in addition, it also includes a battery air cooling mode. Battery cooling means that the heat of the battery is taken away by the refrigerant through the Chiller, and the compressor needs to be started for the refrigeration cycle; battery air cooling means that the heat of the battery enters the LTR through hot water to dissipate heat to the environment, and there is no need to start the compressor to do additional work.

[0064] like Fig.12 and Fig.13 As shown, in one embodiment of the present invention, in the battery air cooling mode, in the extended-range 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, wherein the motor circuit achieves heat exchange with the battery circuit through the second port, the third port, the fifth port and the sixth port 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 in the extended-range state is better.

[0065] like Fig.14 and Fig.15As shown, in one embodiment of the present invention, in the electric drive cooling mode, in the extended-range state, the electric drive cooling is achieved by the high-temperature radiator 9 in the engine circuit and the low-temperature radiator 19 in the motor circuit exchanging heat with the motor 18 to achieve electric drive cooling; in the pure electric state, the electric drive cooling is achieved only by the low-temperature radiator 19 in the motor circuit. It can be seen that the electric drive cooling effect is better in the extended-range state.

[0066] In the motor heating battery mode, the engine will start in the extended range state, and the battery can be heated directly using the engine's waste heat.

[0067] like Fig.16 As shown, in one embodiment of the present invention, in the motor heating battery mode, in the pure electric state, in the motor circuit, the coolant passes 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 to realize the motor heating cycle.

[0068] Based on this, the electric vehicle thermal management system to be protected by the present invention is an integration of the contradictions existing in the prior art. The present invention realizes the effective thermal management of the passenger compartment and the battery by the engine and the motor through the integration of various circuits, realizes the comprehensive utilization of the energy of the whole vehicle, and can heat the passenger compartment and the battery with the heat of the engine and the motor under different mode combinations, thereby maximizing the utilization of energy.

[0069] It should be noted that the various modes involved in the present invention, such as passenger compartment heating mode, passenger compartment cooling mode, passenger compartment dehumidification mode, battery heating mode, battery cooling mode, battery air cooling mode, electric drive cooling mode and motor heating battery mode, etc., can all be judged or obtained through existing sensor data. The present invention is not limited to specific data obtained through temperature sensor data, humidity sensor data, etc. The present invention is still generally applicable to the distinction and application between modes by reference to the division method according to season, region, latitude, etc., and the above improvements are still within the scope of protection of the present invention.

[0070] It should be noted that the loop method and drawings of the extended-range thermal management system shown in the present invention have clearly disclosed the role and effect of each component in different thermal management requirements. Those skilled in the art, knowing the technical solution provided by the present invention, the simple stacking, modification, addition and deletion of components performed by them should all fall within the scope of protection of the present invention.

[0071] A second aspect of the present invention provides a control method based on any one of the above-mentioned electric vehicle thermal management systems, the electric vehicle thermal management system comprising: Refrigerant circuit, engine circuit, battery circuit; The refrigerant circuit includes an evaporator, the engine circuit includes a heater core, and the refrigerant circuit and the engine circuit exchange heat via the evaporator and the heater core; The battery circuit and the refrigerant circuit jointly include a battery cooler, and heat is exchanged between the battery circuit and the refrigerant circuit via the battery cooler; The engine circuit and the motor circuit jointly include an electronic thermostat, and heat is exchanged between the motor circuit and the engine circuit via the electronic thermostat.

[0072] A third aspect of the present invention provides an electric vehicle, comprising a range-extended electric vehicle thermal management system as described in any one of the above.

[0073] like Fig.17 As shown, the fourth aspect of the present invention provides an electronic device, including: At least one processor; and at least one memory in communication with the processor, wherein: the memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the steps of the method described in any one of the above embodiments.

[0074] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0075] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by 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 instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management system for an extended-range electric vehicle, characterized in that: At least: Refrigerant circuit, engine circuit and battery circuit; The refrigerant circuit includes an evaporator, the engine circuit includes a heater core, and the refrigerant circuit and the engine circuit exchange heat via the evaporator and the heater core; The battery circuit and the refrigerant circuit jointly include a battery cooler, and heat is exchanged between the battery circuit and the refrigerant circuit via the battery cooler; The engine circuit and the motor circuit jointly include an electronic thermostat, and heat is exchanged between the battery circuit and the engine circuit via the electronic thermostat.

2. The thermal management system of the extended-range electric vehicle according to claim 1, characterized in that: The refrigerant circuit further includes a compressor, an outdoor heat exchanger, a liquid storage tank, a first electronic expansion valve, a second electronic expansion valve and a battery cooler; the first electronic expansion valve is connected in parallel with the second electronic expansion valve, 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 storage tank, and 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, and then returns to the compressor again.

3. The thermal management system of the extended-range 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 pipelines.

4. The thermal management system of the extended-range electric vehicle according to claim 3, characterized in that: In the passenger compartment dehumidification mode, in the extended range state, the refrigerant circuit and the engine circuit jointly dehumidify the passenger compartment, including removing water vapor from the passenger compartment through the evaporator in the refrigerant circuit and regulating the temperature of the passenger compartment through the engine heat.

5. The thermal management system of the extended-range electric vehicle according to claim 3, characterized in that: In the passenger compartment heating mode, in the extended range state, the heat generated by the engine is used to heat the passenger compartment through the heater core.

6. The thermal management system of the extended-range electric vehicle according to claim 3, characterized in that: In battery heating mode, during the range extension period, the heat generated by the engine heats the battery via the electronic thermostat.

7. The thermal management system of the extended-range electric vehicle according to claim 1, characterized in that: It also includes a motor circuit and a six-way valve, and the motor circuit selectively exchanges heat with the battery circuit via the six-way valve.

8. The thermal management system of the extended-range electric vehicle according to claim 7, characterized in that: The motor circuit includes a motor and a low-temperature radiator connected in parallel, the liquid inlet end of the motor is connected to the fifth port of the six-way valve via a pipeline, the liquid inlet end of the low-temperature radiator is connected to the sixth port of the six-way valve via a pipeline, and the liquid outlet ends of the motor and the low-temperature radiator are merged and connected to the first port of the six-way valve via a pipeline.

9. The thermal management system of the extended-range electric vehicle according to claim 8, characterized in that: The second port of the six-way valve is connected to the liquid inlet end of the battery via a pipeline; the third port of the six-way valve is connected to the lower liquid inlet end of the battery cooler via a pipeline; the fourth port of the six-way valve is connected to the electronic thermostat via a pipeline.

10. A control method for the electric vehicle thermal management system according to claim 1, characterized in that: The electric vehicle thermal management system at least includes: Refrigerant circuit, engine circuit and battery circuit; The refrigerant circuit includes an evaporator, the engine circuit includes a heater core, and the refrigerant circuit and the engine circuit exchange heat via the evaporator and the heater core; The battery circuit and the refrigerant circuit jointly include a battery cooler, and heat is exchanged between the battery circuit and the refrigerant circuit via the battery cooler; The engine circuit and the motor circuit jointly include an electronic thermostat, and heat is exchanged between the motor circuit and the engine circuit via the electronic thermostat.

11. An electric vehicle, characterized in that: include: A thermal management system for an extended-range electric vehicle as described in any one of claims 1 to 9.

12. 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 calls the program instructions to execute the steps of the control method of the electric vehicle thermal management system as described in claim 10.

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