A range-extended new energy vehicle thermal management system and vehicle

Abstract

The present application provides a range-extended new energy vehicle thermal management system and a vehicle. The system includes a PTC heating water circuit, an electric drive circuit, and a refrigerant circuit. A six-way valve is used to connect each branch of the PTC heating water circuit; a seven-way valve is used to connect each branch of the electric drive circuit. By switching the states of the six-way valve and the seven-way valve, the heat of the PTC heating water circuit is used to heat the battery branch and the air-conditioning branch; at the same time, the electric drive branch, the battery cooling branch, and the radiator branch are used to absorb ambient heat. By the above method, each circuit is connected to the six-way valve and the seven-way valve, which can reduce the number of valves in the thermal management system, simplify the pipeline layout, and reduce costs.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of automotive thermal management, and particularly relates to a range-extended new energy vehicle thermal management system and an automobile. Background Art

[0002] Range-extended new energy vehicles driven purely by electricity have become a hot research object in the related technical fields due to their advantages such as energy conservation, environmental protection, and low carbon emissions.

[0003] In the prior art, the battery usage efficiency of range-extended new energy vehicles driven purely by electricity greatly affects the driving life after a single charge of the range-extended new energy vehicle. When driving in a cold environment in winter, it is necessary to use the waste heat of the engine or a PTC water heater for heating or heating the battery. Such heating methods will increase the energy consumption of the battery and greatly reduce the cruising range; therefore, it is necessary to design a thermal management system for range-extended new energy vehicles.

[0004] The existing thermal management systems have the following defects:

[0005] 1. Currently, in the industry, the number of water valves used in the thermal management system is large, the pipeline layout is complex, and the cost is high;

[0006] 2. When using a water PTC for heating the warm air and heating the battery, the PTC hot water directly passes through the battery pack, and there is a risk of thermal shock to the battery pack;

[0007] 3. In a low-temperature environment, heating the battery by means of motor stall has a large noise and will cause poor NHV performance of the whole vehicle. Summary of the Invention

[0008] In view of the above defects or deficiencies in the prior art, it is desirable to provide a range-extended new energy vehicle thermal management system and an automobile.

[0009] On the one hand, the present application provides a range-extended new energy vehicle thermal management system, including:

[0010] A PTC heating water circuit, the PTC heating water circuit includes: a PTC branch, an engine branch, an air-conditioning branch, and a heat exchange branch; the PTC heating water circuit is used to absorb the heat generated by the engine;

[0011] An electric drive circuit, the electric drive circuit includes: a battery branch, an electric drive branch, a battery cooling branch, and a radiator branch; the electric drive circuit is used to deliver the heat transferred from the PTC heating water circuit (1) to the battery and the radiator;

[0012] A refrigerant circuit, the refrigerant circuit is used to perform heat exchange with the PTC heating water circuit and the electric drive circuit respectively;

[0013] A six-way valve, the six-way valve is respectively connected to each branch of the PTC heating water circuit; the six-way valve is used to make the air-conditioning branch and the heat exchange branch be connected in parallel with each other, and at the same time be connected in series with the PTC branch;

[0014] A seven-way valve, the seven-way valve is respectively connected to each branch of the electric drive circuit; the seven-way valve is used to make the battery branch form a circuit alone, and the electric drive branch, the battery cooling branch and the radiator branch are connected in series to form a circuit;

[0015] Wherein, the heat of the PTC heating water circuit is used to heat the battery branch and the air-conditioning branch; at the same time, the electric drive branch, the battery cooling branch and the radiator branch are used to absorb ambient heat.

[0016] According to the technical solution provided by the embodiment of the present application, the six-way valve has a first state; when the six-way valve is in the first state, the air-conditioning branch and the heat exchange branch are connected in parallel with each other and are connected in series with the PTC branch;

[0017] The seven-way valve has a sixth state; when the seven-way valve is in the sixth state, the battery branch forms a circuit alone; the electric drive branch, the battery cooling branch and the radiator branch are connected in series to form a circuit.

[0018] According to the technical solution provided by the embodiment of the present application, a plate heat exchanger is connected in series on the heat exchange branch; the battery branch is connected to the other two ends of the plate heat exchanger and a battery module is also connected in series;

[0019] The heat exchange branch exchanges heat with the battery branch through the plate heat exchanger.

[0020] According to the technical solution provided by the embodiment of the present application, a water-cooled condenser and a PTC are connected in series on the PTC branch; an engine assembly and a first radiator are connected in series on the engine branch; an air-conditioning box is connected in series on the air-conditioning branch;

[0021] An electric drive module and a water storage kettle are connected in series on the electric drive branch; a battery cooler is connected in series on the battery cooling branch; a second radiator is connected in series on the radiator branch;

[0022] The battery cooling branch exchanges heat with the refrigerant circuit through the battery cooler.

[0023] According to the technical solution provided by the embodiment of the present application, the refrigerant circuit includes: a compressor, a water-cooled condenser, a liquid storage tank and a battery cooler connected in series in sequence; the water-cooled condenser is connected in parallel with an air-cooled condenser; the battery cooler is connected in parallel with the air-conditioning box;

[0024] The refrigerant circuit exchanges heat with the PTC branch through the water-cooled condenser; exchanges heat with the battery cooling branch through the battery cooler; and exchanges heat with the air-conditioning branch through the air-conditioning box.

[0025] According to the technical solution provided by the embodiment of the present application, a first solenoid valve is connected in series in the branch where the air-cooled condenser is located, and is used to control the connection of the air-cooled condenser to the refrigerant circuit;

[0026] A second solenoid valve is connected in series in the branch where the water-cooled condenser is located, and is used to control the connection of the water-cooled condenser to the refrigerant circuit;

[0027] A third solenoid valve is connected in series in the branch where the air-conditioning box is located, and is used to control the connection of the air-conditioning box to the refrigerant circuit;

[0028] A fourth solenoid valve is connected in series in the branch where the battery cooler is located, and is used to control the connection of the battery cooler to the refrigerant circuit.

[0029] According to the technical solution provided by the embodiment of the present application, the seven-way valve further has a seventh state;

[0030] When the six-way valve is in the first state and the seven-way valve is in the seventh state, the air-conditioning branch and the heat exchange branch are connected in parallel with each other and are connected in series with the PTC branch; the battery branch forms a separate circuit, and the electric drive branch and the battery cooling branch are connected in series to form a circuit;

[0031] The cooling water of the refrigerant circuit releases heat and is cooled at the PTC branch, and absorbs heat at the battery cooling branch;

[0032] After the cooling water of the PTC heating water circuit absorbs heat at the PTC heating water circuit, it releases heat at the air-conditioning branch and the heat exchange branch respectively; at the same time, it heats the passenger compartment connected to the air-conditioning branch and the battery connected to the battery branch.

[0033] According to the technical solution provided by the embodiment of the present application, the six-way valve further has a second state; the seven-way valve further has a tenth state;

[0034] When the six-way valve is in the second state and the seven-way valve is in the tenth state, the air-conditioning branch and the heat exchange branch are connected in parallel with each other and are connected in series with the PTC branch and the engine branch; the battery branch, the electric drive branch, the battery cooling branch and the radiator branch are connected in series to form a circuit;

[0035] The cooling water in the PTC heating water circuit absorbs heat at the engine branch and then releases heat at the heat exchange branch and the air-conditioning branch; the second radiator connected to the air-conditioning branch and the radiator branch is used to dissipate heat from the engine branch connected to the engine.

[0036] According to the technical solution provided by the embodiment of the present application, the six-way valve further has a third state;

[0037] When the six-way valve is in the third state and the seven-way valve is in the tenth state, the PTC branch and the heat exchange branch are connected in series to form a loop; the battery branch, the electric drive branch, the battery cooling branch, and the radiator branch are connected in series to form a loop;

[0038] The cooling water in the refrigerant loop releases heat and cools at the PTC branch and absorbs heat at the battery cooling branch;

[0039] After the cooling water in the PTC heating water loop absorbs heat at the PTC heating water loop, it releases heat at the heat exchange branch, and the cooling water in the electric drive loop absorbs heat and heats the second radiator connected to the radiator branch for defrosting.

[0040] On the other hand, the present application provides an automobile, including an extended-range new energy vehicle thermal management system as described in any one of the above.

[0041] The beneficial effects of the present application are as follows:

[0042] By providing a six-way valve and a seven-way valve; the six-way valve is respectively connected to the PTC branch, the engine branch, the air-conditioning branch, and the heat exchange branch of the PTC heating water loop; the seven-way valve is respectively connected to the battery branch, the electric drive branch, the battery cooling branch, and the radiator branch.

[0043] The six-way valve makes the air-conditioning branch and the heat exchange branch be connected in parallel with each other and at the same time be connected in series with the PTC branch; when the seven-way valve makes the battery branch form a loop alone and the electric drive branch, the battery cooling branch, and the radiator branch are connected in series to form a loop, the heat of the PTC heating water loop is used to heat the battery branch and the air-conditioning branch; at the same time, the electric drive branch, the battery cooling branch, and the radiator branch are used to absorb ambient heat.

[0044] By the above method, each loop is connected to the six-way valve and the seven-way valve, which can reduce the number of valves in the thermal management system, simplify the pipeline layout, and reduce costs; also, by switching the states of the six-way valve and the seven-way valve, the cooling water in the loop is used to transfer heat to heat the battery, which can avoid the direct passage of PTC hot water to the battery pack and avoid the risk of thermal shock; using the cooling water in the loop to absorb the waste heat of the engine to heat the battery reduces the motor noise and improves the NVH performance of the whole vehicle. Description of the Drawings

[0045] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more obvious:

[0046] Figure 1 Schematic diagram of the loop structure of a range-extended new energy vehicle thermal management system provided for this application;

[0047] Figure 2 Schematic diagram of the structure of the PTC heating water loop;

[0048] Figure 3 Schematic diagram of the refrigerant loop structure;

[0049] Figure 4 Schematic diagram of the electric drive loop structure;

[0050] Figure 5 Schematic diagram of the port connection relationship between the six-way valve and the seven-way valve;

[0051] Figure 6 Schematic diagram of the connection relationship between each loop and the six-way valve and the seven-way valve;

[0052] Figure 7 Schematic diagram of the connection when the six-way valve is in the first state;

[0053] Figure 8 Schematic diagram of the connection when the six-way valve is in the second state;

[0054] Figure 9 Schematic diagram of the connection when the six-way valve is in the third state;

[0055] Figure 10 Schematic diagram of the connection when the six-way valve is in the fourth state;

[0056] Figure 11 Schematic diagram of the connection when the seven-way valve is in the fifth state;

[0057] Figure 12 Schematic diagram of the connection when the seven-way valve is in the sixth state;

[0058] Figure 13 Schematic diagram of the connection when the seven-way valve is in the seventh state;

[0059] Figure 14 Schematic diagram of the connection when the seven-way valve is in the eighth state;

[0060] Figure 15 Schematic diagram of the connection when the seven-way valve is in the ninth state;

[0061] Figure 16 Schematic diagram of the connection when the seven-way valve is in the tenth state;

[0062] Figure 17 Schematic diagram of the connection when the seven-way valve is in the eleventh state;

[0063] Wherein: 1. PTC heating water circuit; 2. Refrigerant circuit; 3. Six-way valve; 4. Seven-way valve; 5. PTC branch; 6. Engine branch; 7. Air-conditioning branch; 8. Heat exchange branch; 9. Battery branch; 10. Electric drive branch; 11. Battery cooling branch; 12. Radiator branch; 13. PTC; 14. Engine assembly; 15. First radiator; 16. Water-cooled condenser; 17. Air-conditioning box; 18. Plate heat exchanger; 19. Battery module; 20. Electric drive module; 21. Water storage kettle; 22. Battery cooler; 23. Second radiator; 24. Compressor; 25. Liquid storage tank; 26. Air-cooled condenser;

[0064] 101. First input end; 102. First output end; 103. Second input end; 104. Second output end; 105. Third input end; 106. Third output end; 107. Fourth input end; 108. Fourth output end; 109. Fifth input end; 110. Fifth output end; 111. Sixth input end; 112. Sixth output end; 113. Seventh input end; 114. Seventh output end; 115. Eighth input end; 116. Eighth output end;

[0065] 201. First end; 202. Second end; 203. Third end; 204. Fourth end; 205. Fifth end; 206. Sixth end; 207. Seventh end; 208. Eighth end; 209. Ninth end; 210. Tenth end; 211. Eleventh end; 212. Twelfth end; 213. Thirteenth end. Detailed implementation manners

[0066] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0067] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0068] Embodiment 1

[0069] Please refer to Figures 1 to 5 , which is a schematic diagram of a range-extended new energy vehicle thermal management system provided in this embodiment, including:

[0070] The PTC heating water circuit 1, the PTC heating water circuit 1 includes: a PTC branch 5, an engine branch 6, an air-conditioning branch 7, and a heat exchange branch 8; the PTC heating water circuit 1 is used to absorb the heat generated by the engine;

[0071] The electric drive circuit, the electric drive circuit includes: a battery branch 9, an electric drive branch 10, a battery cooling branch 11, and a radiator branch 12; the electric drive circuit is used to transfer the heat transferred in the PTC heating water circuit 1 to the battery and the radiator.

[0072] The refrigerant circuit 2, the refrigerant circuit 2 is used to perform heat exchange with the PTC heating water circuit 1 and the electric drive circuit respectively.

[0073] The six-way valve 3, the six-way valve 3 is respectively connected to each branch of the PTC heating water circuit 1; the six-way valve 3 is used to make the air-conditioning branch 7 and the heat exchange branch 8 be in parallel with each other, and at the same time be in series with the PTC branch 5.

[0074] The seven-way valve 4, the seven-way valve 4 is respectively connected to each branch of the electric drive circuit; the seven-way valve 4 is used to make the battery branch 9 form a loop alone, and the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop.

[0075] Wherein, the heat of the PTC heating water circuit 1 is used to heat the battery branch 9 and the air-conditioning branch 7; at the same time, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are used to absorb the ambient heat.

[0076] Specifically, referring to Figures 6 to 17 , the PTC branch 5 has a first input end 101 and a first output end 102; the engine branch 6 has a second input end 103 and a second output end 104; the air-conditioning branch 7 has a third input end 105 and a third output end 106; the heat exchange branch 8 has a fourth input end 107 and a fourth output end 108.

[0077] The battery branch 9 has a fifth input end 109 and a fifth output end 110; the electric drive branch 10 has a sixth input end 111 and a sixth output end 112; the battery cooling branch 11 has a seventh input end 113 and a seventh output end 114; the radiator branch 12 has an eighth input end 115 and an eighth output end 116; the eighth output end 116 is communicated with the sixth input end 111.

[0078] Specifically, the six-way valve 3 has a first end 201, a second end 202, a third end 203, a fourth end 204, a fifth end 205, and a sixth end 206.

[0079] The first end 201 is in communication with the first output end 102; the second end 202 is in communication with the fourth input end 107; the third end 203 is in communication with the third input end 105; the fourth end 204 is in communication with the third output end 106 and the fourth output end 108; the fifth end 205 is in communication with the first input end 101 and the second output end 104; the sixth end 206 is in communication with the second input end 103.

[0080] Specifically, the seven-way valve 4 has a seventh end 207, an eighth end 208, a ninth end 209, a tenth end 210, an eleventh end 211, a twelfth end 212, and a thirteenth end 213.

[0081] The seventh end 207 is in communication with the seventh input end 113; the eighth end 208 is in communication with the seventh output end 114; the ninth end 209 is in communication with the sixth output end 112; the tenth end 210 is in communication with the sixth input end 111; the eleventh end 211 is in communication with the eighth input end 115; the twelfth end 212 is in communication with the fifth input end 109; the thirteenth end 213 is in communication with the fifth output end 110.

[0082] In some embodiments, the functions of all the water valves in the entire thermal management system are concentrated on a six-way valve 3 and a seven-way valve 4. By connecting the respective ends of the six-way valve 3 to the PTC branch 5, the engine branch 6, the air-conditioning branch 7, and the heat exchange branch 8 of the PTC heating water circuit 1; and connecting the respective ends of the seven-way valve 4 to the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 of the electric drive circuit, the states of the six-way valve 3 and the seven-way valve 4 can be freely switched, thereby switching the connection relationships between the respective branches. Ultimately, the waste heat generated by the engine can be reasonably distributed according to actual needs, and the waste heat generated by the engine can be used to heat the passenger compartment and the battery in a cold environment, ensuring that passengers have a good riding experience; at the same time, the battery can be maintained within the normal operating temperature range, ensuring the normal operation of the entire vehicle.

[0083] The thermal management system provided by the present application only includes a six-way valve 3 and a seven-way valve 4, which can realize the reasonable utilization of the entire engine waste heat; the pipeline structure of the thermal management system is simplified through a simpler design, reducing the cost consumption of the water valve.

[0084] In some embodiments, in the thermal management system provided by the present application, heat is transferred by means of heat exchange between multiple loops. The hot water generated at the PTC flows from the PTC branch 5 to the heat exchange branch 8, and the heat in the hot water is transferred to the water in the battery branch 9 through a plate heat exchanger; the cooling water in the battery branch 9 is used to absorb heat secondly and flows to the battery pack to heat the battery pack; it can avoid the hot water generated by heating at the PTC from directly flowing through the battery pack, generating a thermal shock and damaging the battery pack.

[0085] Among them, according to the first law and the second law of thermodynamics, during the heat transfer process between two loops, part of the heat will be dissipated to the environment with a lower temperature, and the heat-absorbing side can only absorb part of the heat. Therefore, using the water in the battery branch 9 to absorb heat secondly will make the water temperature after the secondary heat absorption significantly lower than the water temperature at the PTC; furthermore, the water temperature for heating the battery pack will not be too high, thus avoiding thermal shock and damaging the battery pack, and ensuring that the battery is in a normal operating temperature range.

[0086] In some embodiments, aiming at the problem that using motor stall to generate heat to heat the battery will generate relatively large noise in the prior art, the thermal management system provided by the present application utilizes the heat generated during motor operation, absorbs the heat through the cooling water in the electric drive branch 10, and transfers the heat to the battery pack to heat the battery when the seven-way valve 4 connects the electric drive branch 10 and the battery branch 9. In this way, there is no need for the motor to stall to generate heat, which can reduce motor noise and improve the NHV performance of the whole vehicle.

[0087] Further, the six-way valve 3 has a first state; when the six-way valve 3 is in the first state, the air-conditioning branch 7 and the heat exchange branch 8 are connected in parallel with each other and in series with the PTC branch 5;

[0088] The seven-way valve 4 has a sixth state; when the seven-way valve 4 is in the sixth state, the battery branch 9 forms a loop alone; the electric drive branch 10, the battery cooling branch 11 and the radiator branch 12 are connected in series to form a loop.

[0089] Specifically, the six-way valve 3 has a first state, a second state, a third state and a fourth state.

[0090] When in the first state, the first end 201, the second end 202 and the third end 203 are connected, and the fourth end 204 and the fifth end 205 are connected;

[0091] When in the second state, the first end 201, the second end 202 and the third end 203 are connected, and the fourth end 204 and the sixth end 206 are connected;

[0092] When in the third state, the first end 201 and the second end 202 are connected, and the fourth end 204 and the fifth end 205 are connected;

[0093] When in the fourth state, the first end 201 and the second end 202 are connected, and the fourth end 204 and the sixth end 206 are connected;

[0094] Specifically, the seven-way valve 4 has a fifth state, a sixth state, a seventh state, an eighth state, a ninth state, a tenth state, and an eleventh state.

[0095] When in the fifth state, the seventh end 207 and the twelfth end 212 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the eleventh end 211 are connected;

[0096] When in the sixth state, the twelfth end 212 and the thirteenth end 213 are connected, the seventh end 207 and the eleventh end 211 are connected, and the eighth end 208 and the ninth end 209 are connected;

[0097] When in the seventh state, the twelfth end 212 and the thirteenth end 213 are connected, the seventh end 207 and the tenth end 210 are connected, and the eighth end 208 and the ninth end 209 are connected;

[0098] When in the eighth state, the seventh end 207 and the tenth end 210 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the twelfth end 212 are connected;

[0099] When in the ninth state, the twelfth end 212 and the thirteenth end 213 are connected;

[0100] When in the tenth state, the seventh end 207 and the eleventh end 211 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the twelfth end 212 are connected;

[0101] When in the eleventh state, the ninth end 209 and the eleventh end 211 are connected.

[0102] Specifically, according to the connection relationships described above, since the respective ends of the six-way valve 3 and the seven-way valve 4 are respectively connected to the input or output ends of the respective branches; at the same time, the states of the six-way valve 3 and the seven-way valve 4 are switched to connect the respective ends inside the valves, thereby connecting the corresponding branches. In the above manner, a six-way valve 3 and a seven-way valve 4 can be used to freely switch the connection relationships between multiple branches, simplify the pipeline layout, and reasonably distribute the heat in the system.

[0103] Further, a plate heat exchanger 18 is connected in series on the heat exchange branch 8; the battery branch 9 is communicated with the other two ends of the plate heat exchanger 18 and a battery module 19 is also connected in series.

[0104] The heat exchange branch 8 exchanges heat with the battery branch 9 through the plate heat exchanger 18.

[0105] In some embodiments, the heat exchange branch 8 exchanges heat with the battery branch 9 through the plate heat exchanger 18, which can utilize the cooling water to absorb heat at the engine and flow to the plate heat exchanger 18 of the heat exchange branch 8. The heat is transferred to the battery branch 9 through the plate heat exchanger 18, and then the heat is transferred to the battery pack through the cooling water in the battery branch 9 to heat the battery.

[0106] Specifically, the cooling water in the battery branch 9 absorbs heat for the second time and flows to the battery pack to heat the battery pack; it can avoid the hot water generated by heating at the PTC directly flowing to the battery pack, resulting in thermal shock and damaging the battery pack.

[0107] Further, a water-cooled condenser 16 and a PTC 13 are connected in series on the PTC branch 5; an engine assembly 14 and a first radiator 15 are connected in series on the engine branch 6; an air-conditioning box 17 is connected in series on the air-conditioning branch 7.

[0108] An electric drive module 20 and a water storage kettle 21 are connected in series on the electric drive branch 10; a battery cooler 22 is connected in series on the battery cooling branch 11; a second radiator 23 is connected in series on the radiator branch 12.

[0109] The battery cooling branch 11 exchanges heat with the refrigerant circuit 2 through the battery cooler 22.

[0110] In some embodiments, the battery cooling branch 11 exchanges heat with the refrigerant circuit 2 through the battery cooler 22; when the seven-way valve 4 connects the battery branch 9 and the battery cooling branch 11, the lower-temperature cooling water in the refrigerant circuit 2 can absorb the temperature of the cooling water in the battery cooling branch 11, and then dissipate the heat generated when the battery outputs electric energy outward, avoiding the temperature at the battery pack being too high and ensuring that the battery pack works within a normal temperature range.

[0111] Further, the refrigerant circuit 2 includes: a compressor 24, a water-cooled condenser 16, a liquid storage tank 25 and a battery cooler 22 connected in series in sequence; the water-cooled condenser 16 is connected in parallel with an air-cooled condenser 26; the battery cooler 22 is connected in parallel with the air-conditioning box 17.

[0112] The refrigerant circuit 2 exchanges heat with the PTC branch 5 through the water-cooled condenser 16; exchanges heat with the battery cooling branch 11 through the battery cooler 22; and exchanges heat with the air-conditioning branch 7 through the air-conditioning box 17.

[0113] In some embodiments, a compressor 24, a water-cooled condenser 16, an air-cooled condenser 26, and a battery cooler 22 for cooling the cooling water in the circuit are connected to the refrigerant circuit 2. Both ends of the water-cooled condenser 16 are connected to the refrigerant circuit 2, and the other two ends are connected to the PTC branch 5, for absorbing the heat of the cooling water in the PTC branch 5 to cool the PTC branch 5.

[0114] Specifically, both ends of the battery cooler 22 are connected to the battery cooling branch 11, and the other two ends are connected to the refrigerant circuit 2, for exchanging heat between the battery cooling branch 11 and the refrigerant circuit 2. When the water temperature on one side of the battery cooling branch 11 is relatively high, the battery cooler 22 cools the battery cooling branch 11; when the water temperature on one side of the battery cooling branch 11 is relatively low, the battery cooler 22 heats the battery cooling branch 11.

[0115] Specifically, both ends of the air-conditioning box 17 are connected to the refrigerant circuit 2, and the other two ends are connected to the air-conditioning branch 7. When the air-conditioning box 17 is only connected to the refrigerant circuit 2, the refrigerant circuit 2 cools the passenger compartment connected to the air-conditioning box 17; when the air-conditioning box 17 is only connected to the air-conditioning branch 7, the relatively warm cooling water in the air-conditioning branch 7 heats the passenger compartment connected to the air-conditioning box 17.

[0116] Through the above heat exchange method, it is possible to reasonably distribute heat according to the actual external environmental temperature and the circuit where the heat in the thermal management system is located, so that each circuit can be in the normal working temperature range.

[0117] Further, a first solenoid valve is connected in series in the branch where the air-cooled condenser 26 is located, for controlling the connection of the air-cooled condenser 26 to the refrigerant circuit 2;

[0118] A second solenoid valve is connected in series in the branch where the water-cooled condenser 16 is located, for controlling the connection of the water-cooled condenser 16 to the refrigerant circuit 2;

[0119] A third solenoid valve is connected in series in the branch where the air-conditioning box 17 is located, for controlling the connection of the air-conditioning box 17 to the refrigerant circuit 2;

[0120] A fourth solenoid valve is connected in series in the branch where the battery cooler 22 is located, for controlling the connection of the battery cooler 22 to the refrigerant circuit 2.

[0121] In some embodiments, solenoid valves are connected in series to the water-cooled condenser 16, the air-cooled condenser 26, the air-conditioning box 17, and the battery cooler 22. According to the connection states of the six-way valve 3 and the seven-way valve 4, the second solenoid valve is opened to switch the connection state between the water-cooled condenser 16 and the refrigerant circuit 2, so that the water-cooled condenser 16 cools the cooling water in the PTC branch 5.

[0122] In some embodiments, after the water-cooled condenser 16 cools the cooling water in the PTC branch 5, the third solenoid valve or the fourth solenoid valve is opened; so that the cooling water that has absorbed heat in the refrigerant circuit 2 flows through the air-conditioning branch 7 or the battery cooling branch 11 to heat the passenger compartment or the battery pack. In the above manner, the refrigerant circuit 2 can be used to cool the PTC heating water circuit 1 and transfer the heat to the electric drive circuit; the function of cooling the circuit is realized.

[0123] Further, when the six-way valve 3 is in the first state and the seven-way valve 4 is in the seventh state, the air-conditioning branch 7 and the heat exchange branch 8 are connected in parallel with each other and in series with the PTC branch 5; the battery branch 9 forms a circuit independently, and the electric drive branch 10 and the battery cooling branch 11 are connected in series to form a circuit;

[0124] The cooling water of the refrigerant circuit 2 releases heat and cools at the PTC branch 5 and absorbs heat at the battery cooling branch 11;

[0125] The cooling water of the PTC heating water circuit 1 absorbs heat at the PTC heating water circuit 1 and then releases heat at the air-conditioning branch 7 and the heat exchange branch 8 respectively; at the same time, it heats the passenger compartment connected to the air-conditioning branch 7 and the battery connected to the battery branch 9.

[0126] In some embodiments, when the six-way valve 3 is in the first state, the first end 201, the second end 202, and the third end 203 are connected, and the fourth end 204 and the fifth end 205 are connected; at this time, the six-way valve 3 connects the air-conditioning branch 7 and the heat exchange branch 8 in parallel with each other and in series with the PTC branch 5.

[0127] When the seven-way valve 4 is in the seventh state, the twelfth end 212 and the thirteenth end 213 are connected, the seventh end 207 and the tenth end 210 are connected, and the eighth end 208 and the ninth end 209 are connected; at this time, the battery branch 9 forms a circuit independently; the electric drive branch 10 and the battery cooling branch 11 are connected in series to form a circuit.

[0128] Specifically, the cooling water in the refrigerant circuit 2 absorbs the heat generated by the battery cooler 22 and the electric drive module 20 at the battery cooling branch 11, and circulates through the water circulation in the circuit to the water-cooled condenser 16; the cooling water at the PTC branch 5 absorbs heat after flowing through the water-cooled condenser 16 connected to the refrigerant circuit 2, and then flows to the air-conditioning branch 7 and the heat exchange branch 8 respectively to release heat; the heat generated by the battery cooler 22 and the electric drive module 20 is transferred to the PTC branch 5, and then to the air-conditioning branch 7 and the heat exchange branch 8; it can heat the passenger compartment connected to the air-conditioning branch 7 and the battery connected to the battery branch 9 at the same time.

[0129] Further, when the six-way valve 3 is in the second state and the seven-way valve 4 is in the tenth state, the air-conditioning branch 7 and the heat exchange branch 8 are connected in parallel with each other and are connected in series with the PTC branch 5 and the engine branch 6; the battery branch 9, the electric drive branch 10, the battery cooling branch 11 and the radiator branch 12 are connected in series to form a circuit;

[0130] The cooling water in the PTC heating water circuit 1 absorbs heat at the engine branch 6 and then releases heat at the heat exchange branch 8 and the air-conditioning branch 7; the second radiator 23 connected to the air-conditioning branch 7 and the radiator branch 12 is used to dissipate heat from the engine branch 6 connected to the engine.

[0131] In some embodiments, when the six-way valve 3 is in the second state, the first end 201, the second end 202 and the third end 203 are connected, and the fourth end 204 and the sixth end 206 are connected; at this time, the air-conditioning branch 7 and the heat exchange branch 8 are connected in parallel with each other and are connected in series with the PTC branch 5 and the engine branch 6 in sequence.

[0132] When the seven-way valve 4 is in the tenth state, the seventh end 207 and the eleventh end 211 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the twelfth end 212 are connected; at this time, the battery branch 9, the electric drive branch 10, the battery cooling branch 11 and the radiator branch 12 are connected in series together to form a circuit.

[0133] Specifically, the cooling water in the PTC heating water circuit 1 absorbs heat at the engine branch 6 and then flows to the heat exchange branch 8 and the air-conditioning branch 7, and releases heat through the plate heat exchanger 18 and the air-conditioning box 17 respectively; the plate heat exchanger 18 releases heat by transferring the heat to the radiator branch 12. In the above manner, the second radiator 23 connected to the air-conditioning branch 7 and the radiator branch 12 can be used to dissipate heat from the engine branch 6 connected to the engine, and all the heat dissipation devices in the entire thermal management system can be reasonably used to dissipate heat from the engine, improving the heat dissipation efficiency.

[0134] Further, when the six-way valve 3 is in the third state and the seven-way valve 4 is in the tenth state, the PTC branch 5 and the heat exchange branch 8 are connected in series to form a loop; the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop;

[0135] The cooling water in the refrigerant circuit 2 releases heat and is cooled at the PTC branch 5 and absorbs heat at the battery cooling branch 11;

[0136] The cooling water in the PTC heating water circuit 1 absorbs heat at the PTC heating water circuit 1 and then releases heat at the heat exchange branch 8, and the cooling water in the electric drive circuit absorbs heat and heats the second radiator 23 connected to the radiator branch 12 for defrosting.

[0137] In some embodiments, when the six-way valve 3 is in the third state, the first end 201 and the second end 202 are connected, and the fourth end 204 and the fifth end 205 are connected; at this time, the PTC branch 5 is connected in series with the heat exchange branch 8.

[0138] When the seven-way valve 4 is in the tenth state, the seventh end 207 and the eleventh end 211 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the twelfth end 212 are connected; at this time, the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop together.

[0139] Specifically, the heat in the PTC heating water circuit 1 is transferred to the battery branch 9 through the plate heat exchanger 18. Since the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop together, the heat transferred by the plate heat exchanger 18 is transferred to the second radiator 23 through the water circulation of the entire electric drive circuit to heat the second radiator 23. By the above method, the frost attached to the surface of the second radiator 23 can be removed by heating, ensuring that the second radiator 23 can normally perform heat dissipation work.

[0140] Specifically, the electric drive module includes a motor. Motor stalling means that a torque is generated at the motor, but no rotation occurs.

[0141] Specifically, the connection states of the ends of the six-way valve 3 and the connection relationships of the branches are as follows.

[0142] In some embodiments, when the six-way valve 3 is in the first state, the first end 201, the second end 202, and the third end 203 are connected, and the fourth end 204 and the fifth end 205 are connected; at this time, the six-way valve 3 makes the air-conditioning branch 7 and the heat exchange branch 8 be connected in parallel with each other and in series with the PTC branch 5.

[0143] In some embodiments, when the six-way valve 3 is in the second state, the first end 201, the second end 202, and the third end 203 are connected, and the fourth end 204 and the sixth end 206 are connected; at this time, the air-conditioning branch 7 and the heat exchange branch 8 are connected in parallel with each other and are successively connected in series with the PTC branch 5 and the engine branch 6.

[0144] In some embodiments, when the six-way valve 3 is in the third state, the first end 201 and the second end 202 are connected, and the fourth end 204 and the fifth end 205 are connected; at this time, the PTC branch 5 is connected in series with the heat exchange branch 8.

[0145] In some embodiments, when the six-way valve 3 is in the fourth state, the first end 201 and the second end 202 are connected, and the fourth end 204 and the sixth end 206 are connected; at this time, the PTC branch 5, the engine branch 6, and the heat exchange branch 8 are connected in series.

[0146] Specifically, the connection states of the respective ends of the seven-way valve 4 and the connection relationships of the respective branches are as follows.

[0147] In some embodiments, when the seven-way valve 4 is in the fifth state, the seventh end 207 and the twelfth end 212 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the eleventh end 211 are connected; at this time, the battery branch 9 is connected in series with the battery cooling branch 1; the electric drive branch 10 is connected in series with the radiator branch 12.

[0148] In some embodiments, when the seven-way valve 4 is in the sixth state, the twelfth end 212 and the thirteenth end 213 are connected, the seventh end 207 and the eleventh end 211 are connected, and the eighth end 208 and the ninth end 209 are connected; at this time, the battery branch 9 forms a loop alone; the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop.

[0149] In some embodiments, when the seven-way valve 4 is in the seventh state, the twelfth end 212 and the thirteenth end 213 are connected, the seventh end 207 and the tenth end 210 are connected, and the eighth end 208 and the ninth end 209 are connected; at this time, the battery branch 9 forms a loop alone; the electric drive branch 10 and the battery cooling branch 11 are connected in series to form a loop.

[0150] In some embodiments, when the seven-way valve 4 is in the eighth state, the seventh end 207 and the tenth end 210 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the twelfth end 212 are connected; at this time, the battery branch 9, the electric drive branch 10, and the battery cooling branch 11 are connected in series to form a loop.

[0151] In some embodiments, when the seven-way valve 4 is in the ninth state, the twelfth end 212 and the thirteenth end 213 are connected; at this time, the battery branch 9 forms a loop alone; the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are all in a disconnected state.

[0152] In some embodiments, when the seven-way valve 4 is in the tenth state, the seventh end 207 and the eleventh end 211 are connected, the eighth end 208 and the thirteenth end 213 are connected, and the ninth end 209 and the twelfth end 212 are connected; at this time, the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop together.

[0153] In some embodiments, when the seven-way valve 4 is in the eleventh state, the ninth end 209 and the eleventh end 211 are connected; at this time, the electric drive branch 10 and the radiator branch 12 are connected in series to form a loop.

[0154] Embodiment 2

[0155] This embodiment provides a vehicle, including an extended-range new energy vehicle thermal management system as described in any one of the above.

[0156] Specifically, a vehicle equipped with an extended-range new energy vehicle thermal management system as described in any one of the above has multiple thermal management modes, specifically including:

[0157] I. Cooling mode: The six-way valve 3 is in a fully closed state, and the seven-way valve 4 is in the fifth state; at this time, the battery branch 9 is connected in series with the battery cooling branch 1; the electric drive branch 10 is connected in series with the radiator branch 12;

[0158] The refrigerant circuit 2 opens the first solenoid valve to connect to the air-cooled condenser 26; opens the third solenoid valve and the fourth solenoid valve to connect to the air-conditioning branch 7 and the battery cooling branch 11.

[0159] The cooling water flows through the air-cooled condenser 26 for cooling, then through the air-conditioning branch 7 connected to the passenger compartment and the battery cooling branch 11 to cool the passenger compartment and the battery; the cooling water in the electric drive branch 10 flows through the second radiator 23 to cool the electric drive branch 10.

[0160] II. First heat pump mode: The six-way valve 3 is in the first state, and the seven-way valve 4 is in the sixth state; at this time, the six-way valve 3 makes the air-conditioning branch 7 and the heat exchange branch 8 be connected in parallel with each other and in series with the PTC branch 5; the battery branch 9 forms a loop alone; the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop.

[0161] The refrigerant circuit 2 opens the second solenoid valve to connect the water-cooled condenser 16; opens the fourth solenoid valve to connect the battery cooler; the cooling water flows through the water-cooled condenser 16 to release heat and be cooled, and then flows through the battery cooler 22 to absorb the heat of the electric drive module 20 and the second radiator 23 and then returns to the compressor 24.

[0162] The PTC water pump is turned on; the cooling water flows through the water-cooled condenser 16 to absorb heat and then flows through the air-conditioning box 17 and the plate heat exchanger 18 to heat the passenger compartment and heat the battery at the same time. The water pumps of the electric drive circuit and the battery circuit are turned on; the coolant in the battery branch flows through the plate heat exchanger 18 to absorb heat and then flows through the battery pack to complete battery heating; the battery cooler 22 and the second radiator 23 absorb ambient heat.

[0163] III. Second heat pump mode: The six-way valve 3 is in the first state, and the seven-way valve 4 is in the seventh state; the six-way valve 3 makes the air-conditioning branch 7 and the heat exchange branch 8 be connected in parallel with each other and in series with the PTC branch 5; the battery branch 9 forms a circuit alone; the electric drive branch 10 and the battery cooling branch 11 are connected in series to form a circuit. The refrigerant circuit 2 opens the second solenoid valve to connect the water-cooled condenser 16; opens the fourth solenoid valve to connect the battery cooler.

[0164] The cooling water flows through the water-cooled condenser to release heat and be cooled, and then flows through the battery cooler to absorb the heat of the electric drive module and the second radiator and then returns to the compressor; the PTC water pump is turned on; the cooling water flows through the water-cooled condenser to absorb heat and then flows through the air-conditioning box and the plate heat exchanger to heat the passenger compartment and heat the battery at the same time.

[0165] The water pumps of the electric drive branch and the battery branch are turned on; the cooling water in the battery branch flows through the plate heat exchanger to absorb heat and then flows through the battery pack to complete battery heating; the electric drive branch is connected to the battery cooler, and the waste heat of the electric drive module is absorbed by the cooling water through the battery cooler and transferred to the refrigerant circuit.

[0166] IV. Third heat pump mode: The six-way valve 3 is in the first state, and the seven-way valve 4 is in the eighth state; the six-way valve 3 makes the air-conditioning branch 7 and the heat exchange branch 8 be connected in parallel with each other and in series with the PTC branch 5; the battery branch 9, the electric drive branch 10 and the battery cooling branch 11 are connected in series to form a circuit. The refrigerant circuit 2 opens the second solenoid valve to connect the water-cooled condenser 16; opens the fourth solenoid valve to connect the battery cooler.

[0167] The cooling water flows through the water-cooled condenser to release heat and be cooled, and then flows through the battery cooler to absorb the heat of the electric drive module and the second radiator and then returns to the compressor; the PTC water pump is turned on; the cooling water flows through the water-cooled condenser to absorb the heat of the cooling water and then flows through the air-conditioning box and the plate heat exchanger to heat the passenger compartment and heat the battery at the same time.

[0168] The water pumps of the electric drive branch and the battery branch are turned on; the electric drive module and the battery branch are connected in series to the plate heat exchanger, and the waste heat of the electric drive module and the battery is absorbed by the cooling water through the battery cooler.

[0169] V. Heating the battery with the waste heat of the electric drive module: The six-way valve 3 is in a fully closed state, and the seven-way valve 4 is in the eighth state; the battery branch 9, the electric drive branch 10, and the battery cooling branch 11 are connected in series to form a loop. The pumps of the electric drive branch and the battery branch are turned on; the heat generated by the motor stalling or the waste heat of the electric drive module is transferred to the battery pack through the cooling water to heat the battery.

[0170] VI. Heating the battery and the passenger compartment with the water PTC: The six-way valve 3 is in the first state, and the seven-way valve 4 is in the ninth state; the six-way valve 3 makes the air-conditioning branch 7 and the heat exchange branch 8 be connected in parallel with each other and be connected in series with the PTC branch 5; the battery branch 9 forms a loop alone; the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are all in a disconnected state.

[0171] The PTC water pump is turned on; the PTC heating and cooling water flows through the air-conditioning box and the battery pack to heat the passenger compartment; at the same time, it heats the battery. The pump of the battery branch is turned on; the cooling water of the battery branch flows through the plate heat exchanger to heat the battery.

[0172] VII. Heating the passenger compartment and the battery with the waste heat of the engine: The six-way valve 3 is in the second state, and the seven-way valve 4 is in the ninth state; the air-conditioning branch 7 and the heat exchange branch 8 are connected in parallel with each other and are connected in series with the PTC branch 5 and the engine branch 6 in sequence; the battery branch 9 forms a loop alone; the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are all in a disconnected state.

[0173] The engine branch is connected to the plate heat exchanger and the air-conditioning box to heat the passenger compartment; at the same time, it heats the battery. The cooling water of the battery branch flows through the plate heat exchanger to absorb heat and then heats the battery.

[0174] VIII. Battery air-cooling mode: The six-way valve 3 is in the second state, and the seven-way valve 4 is in the tenth state; the air-conditioning branch 7 and the heat exchange branch 8 are connected in parallel with each other and are connected in series with the PTC branch 5 and the engine branch 6 in sequence; the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop together.

[0175] The cooling water in the PTC heating water circuit 1 absorbs heat at the engine branch 6 and then flows to the heat exchange branch 8 and the air-conditioning branch 7, and releases heat through the plate heat exchanger 18 and the air-conditioning box 17 respectively; the plate heat exchanger 18 releases heat by transferring the heat to the radiator branch 12.

[0176] IX. Heat pump defrosting: The six-way valve 3 is in the third state, and the seven-way valve 4 is in the tenth state; the PTC branch 5 is connected in series with the heat exchange branch 8; the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a loop together.

[0177] The refrigerant circuit 2 opens the second solenoid valve to connect the water-cooled condenser 16; opens the fourth solenoid valve to connect the battery cooler.

[0178] The heat in the PTC heating water circuit 1 is transferred to the battery branch 9 through the plate heat exchanger 18. Since the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a circuit together, the heat transferred by the plate heat exchanger 18 is transferred to the second radiator 23 through the water circulation of the entire electric drive branch to heat the second radiator 23.

[0179] X. Water PTC defrosting: The six-way valve 3 is in the third state, and the seven-way valve 4 is in the tenth state; the PTC branch 5 is connected in series with the heat exchange branch 8; the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a circuit together. The cooling water heated by the PTC flows through the plate heat exchanger to heat the cooling water of the electric drive circuit, thereby defrosting the radiator.

[0180] XI. Engine waste heat defrosting: The six-way valve 3 is in the fourth state, and the seven-way valve 4 is in the tenth state; the PTC branch 5, the engine branch 6, and the heat exchange branch 8 are connected in series; the battery branch 9, the electric drive branch 10, the battery cooling branch 11, and the radiator branch 12 are connected in series to form a circuit together. The engine branch is connected to the plate heat exchanger to heat the cooling water of the battery branch, thereby defrosting the radiator.

[0181] XII. Electric drive module waste heat defrosting: The six-way valve 3 is in a fully closed state, and the seven-way valve 4 is in the eleventh state; the electric drive branch 10 is connected in series with the radiator branch 12 to form a circuit. The heat generated by the motor stalling or the waste heat of the electric drive module is transferred to the second radiator through the cooling water to defrost it.

[0182] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A range-extended new energy vehicle thermal management system, characterized in that, Including: A PTC heated water circuit (1), the PTC heated water circuit (1) including: a PTC branch (5), an engine branch (6), an air-conditioning branch (7), and a heat exchange branch (8); the PTC heated water circuit (1) is used to absorb the heat generated by the engine; An electric drive circuit, the electric drive circuit including: a battery branch (9), an electric drive branch (10), a battery cooling branch (11), and a radiator branch (12); the electric drive circuit is used to transfer the heat transferred from the PTC heated water circuit (1) to the battery and the radiator; A refrigerant circuit (2), the refrigerant circuit (2) being used to perform heat exchange with the PTC heated water circuit (1) and the electric drive circuit respectively; A six-way valve (3), the six-way valve (3) being respectively connected to each branch of the PTC heated water circuit (1); the six-way valve (3) is used to make the air-conditioning branch (7) and the heat exchange branch (8) be in parallel with each other and in series with the PTC branch (5) at the same time; A seven-way valve (4), the seven-way valve (4) being respectively connected to each branch of the electric drive circuit; the seven-way valve (4) is used to make the battery branch (9) form a circuit alone, and the electric drive branch (10), the battery cooling branch (11), and the radiator branch (12) form a series circuit; Wherein, the heat of the PTC heated water circuit (1) is used to heat the battery branch (9) and the air-conditioning branch (7); at the same time, the electric drive branch (10), the battery cooling branch (11), and the radiator branch (12) are used to absorb ambient heat.

2. The range-extended new energy vehicle thermal management system according to claim 1, characterized in that, The six-way valve (3) has a first state; when the six-way valve (3) is in the first state, the air-conditioning branch (7) and the heat exchange branch (8) are in parallel with each other and in series with the PTC branch (5); The seven-way valve (4) has a sixth state; when the seven-way valve (4) is in the sixth state, the battery branch (9) forms a circuit alone; the electric drive branch (10), the battery cooling branch (11), and the radiator branch (12) form a series circuit.

3. The range-extended new energy vehicle thermal management system according to claim 1, wherein A plate heat exchanger (18) is connected in series on the heat exchange branch (8); the battery branch (9) is connected to the other two ends of the plate heat exchanger (18) and a battery module (19) is also connected in series; The heat exchange branch (8) performs heat exchange with the battery branch (9) through the plate heat exchanger (18).

4. The range-extended new energy vehicle thermal management system according to claim 3, wherein, A water-cooled condenser (16) and a PTC (13) are connected in series on the PTC branch (5); an engine assembly (14) and a first radiator (15) are connected in series on the engine branch (6); an air-conditioning box (17) is connected in series on the air-conditioning branch (7); An electric drive module (20) and a water storage kettle (21) are connected in series on the electric drive branch (10); a battery cooler (22) is connected in series on the battery cooling branch (11); a second radiator (23) is connected in series on the radiator branch (12); The battery cooling branch (11) performs heat exchange with the refrigerant circuit (2) through the battery cooler (22).

5. The range-extended new energy vehicle thermal management system according to claim 4, characterized in that, The refrigerant circuit (2) includes: a compressor (24), a water-cooled condenser (16), a liquid storage tank (25), and a battery cooler (22) connected in series in sequence; an air-cooled condenser (26) is connected in parallel with the water-cooled condenser (16); the battery cooler (22) is connected in parallel with the air-conditioning box (17); The refrigerant circuit (2) exchanges heat with the PTC branch (5) through the water-cooled condenser (16); exchanges heat with the battery cooling branch (11) through the battery cooler (22); exchanges heat with the air-conditioning branch (7) through the air-conditioning box (17).

6. The range-extended new energy vehicle thermal management system according to claim 5, characterized in that, A first solenoid valve is connected in series in the branch where the air-cooled condenser (26) is located, for controlling the connection of the air-cooled condenser (26) to the refrigerant circuit (2); A second solenoid valve is connected in series in the branch where the water-cooled condenser (16) is located, for controlling the connection of the water-cooled condenser (16) to the refrigerant circuit (2); A third solenoid valve is connected in series in the branch where the air-conditioning box (17) is located, for controlling the connection of the air-conditioning box (17) to the refrigerant circuit (2); A fourth solenoid valve is connected in series in the branch where the battery cooler (22) is located, for controlling the connection of the battery cooler (22) to the refrigerant circuit (2).

7. The range-extended new energy vehicle thermal management system according to claim 2, wherein, The seven-way valve (4) also has a seventh state; When the six-way valve (3) is in the first state and the seven-way valve (4) is in the seventh state, the air-conditioning branch (7) and the heat exchange branch (8) are connected in parallel with each other and are connected in series with the PTC branch (5); the battery branch (9) forms a circuit alone, and the electric drive branch (10) and the battery cooling branch (11) are connected in series to form a circuit; The cooling water of the refrigerant circuit (2) releases heat and cools at the PTC branch (5), and absorbs heat at the battery cooling branch (11); After the cooling water in the PTC heating water circuit (1) absorbs heat at the PTC heating water circuit (1), it releases heat at the air-conditioning branch (7) and the heat exchange branch (8) respectively; at the same time, it heats the passenger compartment connected to the air-conditioning branch (7) and the battery connected to the battery branch (9).

8. The range-extended new energy vehicle thermal management system according to claim 4, wherein, The six-way valve (3) also has a second state; the seven-way valve (4) also has a tenth state; When the six-way valve (3) is in the second state and the seven-way valve (4) is in the tenth state, the air-conditioning branch (7) and the heat exchange branch (8) are connected in parallel with each other and are connected in series with the PTC branch (5) and the engine branch (6); the battery branch (9), the electric drive branch (10), the battery cooling branch (11), and the radiator branch (12) are connected in series to form a circuit; The cooling water in the PTC heating water circuit (1) absorbs heat at the engine branch (6) and then releases heat at the heat exchange branch (8) and the air-conditioning branch (7); the second radiator (23) connected to the air-conditioning branch (7) and the radiator branch (12) is used to dissipate heat from the engine branch (6) connected to the engine.

9. The range-extended new energy vehicle thermal management system according to claim 4, characterized in that, The six-way valve (3) also has a third state; When the six-way valve (3) is in the third state and the seven-way valve (4) is in the tenth state, the PTC branch (5) and the heat exchange branch (8) are connected in series to form a loop; the battery branch (9), the electric drive branch (10), the battery cooling branch (11) and the radiator branch (12) are connected in series to form a loop; The cooling water of the refrigerant circuit (2) releases heat and is cooled at the PTC branch (5) and absorbs heat at the battery cooling branch (11); The cooling water of the PTC heating water circuit (1) absorbs heat at the PTC heating water circuit (1), releases heat at the heat exchange branch (8), and the cooling water in the electric drive circuit absorbs heat and then heats the second radiator (23) connected to the radiator branch (12) for defrosting.

10. A vehicle, characterized in that, It includes a range-extended new energy vehicle thermal management system according to any one of claims 1-9.

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