Thermal management system of new energy vehicle and vehicle

Abstract

The present invention provides a thermal management system and a vehicle for a new energy vehicle, belonging to the field of thermal management technology, comprising a refrigerant circuit and a coolant circuit, wherein the refrigerant circuit comprises a compressor, a liquid storage tank, a subcooler, a condenser, and a cooler, wherein the first output end of the liquid storage tank is connected to the subcooler, the second output end of the liquid storage tank is connected to the subcooler, the first output end of the subcooler is connected to the input end of the cooler, the second output end of the subcooler is connected to the electric compressor, and the output end of the cooler is connected to the first input end of the electric compressor; the coolant circuit comprises a ten-way valve and a proportional three-way valve, and by adopting a compressor that supplements air and increases enthalpy, the subcooling degree of the condenser inlet and the temperature of the gaseous refrigerant of the compressor inlet are increased, thereby achieving the purpose of improving the heating efficiency of the system; by adopting a ten-way valve to achieve the connection between multiple parts, the purpose of improving the system integration is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of thermal management technology, and in particular relates to a thermal management system and a vehicle for a new energy vehicle. Background Art

[0002] Currently, the mainstream refrigerant used in new energy vehicle air conditioning systems is still Freon (R134a). However, due to the Kigali Amendment and other relevant industry regulations, the use of Freon-based automotive air conditioning refrigerants will be gradually reduced. Therefore, thermal management systems using alternative refrigerants such as carbon dioxide and propane have become a hot topic in industry research. However, CO2's high operating pressure, strict pressure rating requirements for air conditioning systems, and low summer cooling performance have limited its application. Propane, on the other hand, is a natural refrigerant with excellent cooling performance. It also offers high efficiency in low-temperature heat pump conditions, a wide operating temperature range, low system pressure requirements, and the lowest equivalent carbon emissions. However, it is flammable, which requires a relatively closed refrigerant side of the thermal management system to ensure the refrigerant is sealed and flame-retardant. Secondly, propane's low density at low temperatures makes it difficult to effectively increase mass flow by increasing the speed of the electric compressor, resulting in low system heating efficiency. Furthermore, the current coolant circuit generally uses a large number of valves, which poorly integrates the system and increases costs. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a thermal management system and a vehicle for a new energy vehicle.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: a thermal management system for a new energy vehicle, comprising a refrigerant circuit and a coolant circuit, the refrigerant circuit comprising an electric compressor, a liquid storage tank, a subcooler, a condenser, and a cooler, the output end of the electric compressor being connected to the input end of the condenser, the output end of the condenser being connected to the input end of the liquid storage tank, the first output end of the liquid storage tank being connected to the first input end of the subcooler, the second output end of the liquid storage tank being connected to the second input end of the subcooler through a second expansion valve, the liquid storage tank being used to store the refrigerant, the second output end of the liquid storage tank being located at the top of the liquid storage tank, the first output end of the subcooler being connected to the input end of the cooler through a first expansion valve, the second output end of the subcooler being connected to the second input end of the electric compressor, and the output end of the cooler being connected to the first input end of the electric compressor;

[0005] The coolant circuit includes a ten-way valve and a proportional three-way valve, wherein port 1 of the ten-way valve is connected to the outlet of the air conditioning box heater core, port 2 of the ten-way valve is connected to the inlet of the condenser, port 4 of the ten-way valve is connected to the inlet of the air conditioning radiator, port 5 of the ten-way valve is connected to the inlet of the cooler, and port 6 of the ten-way valve is connected to the outlet of the air conditioning box refrigerator core;

[0006] Port 1 of the proportional three-way valve is connected to the outlet of the cooler, port 2 of the proportional three-way valve is connected to the inlet of the air-conditioning box refrigeration core, and port 3 of the proportional three-way valve is connected to port 6 of the ten-way valve.

[0007] As a further improvement scheme: port 3 of the ten-way valve is connected to the inlet of the low-temperature radiator, port 7 of the ten-way valve is connected to the inlet of the electric drive and DC-DC converter module, port 8 of the ten-way valve is connected to the outlet of the electric drive and DC-DC converter module, port 9 of the ten-way valve is connected to the outlet of the battery module, and port 10 of the ten-way valve is connected to the inlet of the battery module.

[0008] As a further improvement: the coolant circuit further includes:

[0009] a first water pump connected in series between port 10 of the ten-way valve and the battery module;

[0010] a second water pump connected in series between port 2 of the ten-way valve and the condenser;

[0011] a third water pump connected in series between port 7 of the ten-way valve and the electric drive and DC-DC converter module;

[0012] The fourth water pump is connected in series between the cooler and the fifth port of the ten-way valve.

[0013] As a further improvement: the refrigerant circuit further includes:

[0014] a first low-pressure temperature sensor, provided on a pipeline connected to the second output end of the subcooler, for collecting the temperature and pressure of the second output end of the subcooler;

[0015] a second low-pressure temperature sensor, provided on a pipeline connected to the output end of the cooler, for collecting the temperature and pressure of the output end of the cooler;

[0016] a high-pressure temperature sensor, provided on a pipeline connected to the output end of the electric compressor, for collecting the temperature and pressure of the output end of the electric compressor;

[0017] As a further improvement: the coolant circuit further includes:

[0018] a first expansion kettle, wherein the inlet of the first expansion kettle is connected to the inlet of the low-temperature radiator and the outlet of the condenser, and the outlet of the first expansion kettle is connected to the inlet of the third water pump and the inlet of the second water pump;

[0019] A second expansion kettle, the inlet of the second expansion kettle is connected to the inlet of the fourth water pump, and the outlet of the second expansion kettle is connected to the 5 ports of the ten-way valve and the refrigeration core of the air-conditioning box.

[0020] As a further improvement: the coolant circuit further includes:

[0021] a first water temperature sensor connected to the condenser outlet;

[0022] a second water temperature sensor connected to an inlet of the battery module;

[0023] a third water temperature sensor connected to the outlet of the electric drive and DC-DC converter module;

[0024] A fourth water temperature sensor is connected to the cooler outlet.

[0025] As a further improvement, a one-way valve is provided between the 9th port of the ten-way valve and the 10th port of the ten-way valve.

[0026] As a further improvement, the invention further comprises a controller, which is connected to the coolant circuit and is used to control the working mode of the coolant circuit.

[0027] The present invention also provides an automobile, comprising the thermal management system for the new energy automobile according to any one of claims 1 to 6.

[0028] As a further improvement:

[0029] Compared with the prior art, the beneficial effects of the present invention are: by providing a coolant circuit, the relative independence of the refrigerant circuit is achieved, thereby achieving the purpose of ensuring the safety of the system; by adopting an electric compressor with air replenishment and enthalpy increase, the subcooling degree of the condenser inlet and the gaseous refrigerant temperature of the electric compressor inlet are increased, thereby achieving the purpose of improving the heating efficiency of the system; by adopting a ten-way valve to achieve the connection between multiple parts, the purpose of improving the system integration is achieved, thereby solving the problems of poor safety, low thermal efficiency and poor system integration of the vehicle thermal management system in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of a thermal management system for a new energy vehicle provided by an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the operating modes of passenger compartment cooling, electric drive cooling, and battery cooling provided by an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the working modes of electric drive cooling and battery cooling provided by an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the operating modes of passenger compartment cooling and electric drive cooling provided by an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the operating modes of passenger compartment heating, battery heating, and electric drive waste heat utilization provided by an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the working mode of battery heating and electric drive waste heat utilization provided by an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the working mode of passenger cabin heating and electric drive waste heat utilization provided by an embodiment of the present invention;

[0037] Figure 8 Schematic diagram of the operating modes of passenger cabin heating, battery heating, and air source heat pump provided by an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the working mode of battery heating and air source heat pump provided by an embodiment of the present invention;

[0039] Figure 10 Schematic diagram of the working mode of passenger cabin heating and air source heat pump provided by an embodiment of the present invention;

[0040] Figure 11 Schematic diagram of the passenger compartment heating and dehumidification working mode provided by an embodiment of the present invention;

[0041] Figure 12 Schematic diagram of the working mode of electric drive cooling or outdoor radiator defrosting provided by an embodiment of the present invention;

[0042] Figure 13 This is the working mode in which the battery module, electric drive and DC-DC converter module provided by the embodiment of the present invention are connected in series to dissipate heat;

[0043] In the figure: 101, electric compressor; 102, condenser; 103, liquid storage tank; 104, second expansion valve; 105, subcooler; 106, first expansion valve; 107, cooler; 201, water heater; 202. Second water pump; 203. First expansion kettle; 204. Ten-way valve; 205. First water pump; 206. Battery module; 207. Electric drive and DC-DC converter module; 208. Third water pump; 209. Air conditioning box; 209-1. Blower; 209-2. Refrigeration core; 209-3. Heater core; 210. Fourth water pump; 211. Proportional three-way valve; 212. Second expansion kettle; 213. Fan; 214. Air conditioning radiator; 215. Low-temperature radiator; 216. One-way valve; 301. High-pressure temperature sensor; 302. First low-pressure temperature sensor; 303. Second low-pressure temperature sensor; 304. First water temperature sensor; 305. Second water temperature sensor; 306. Third water temperature sensor; 307. Fourth water temperature sensor. DETAILED DESCRIPTION

[0044] The technical solution of the present application will be further described in detail below in conjunction with specific implementation methods.

[0045] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0046] See also Figure 1 、 Figure 2In one embodiment, a thermal management system for a new energy vehicle includes a refrigerant circuit and a coolant circuit. The refrigerant circuit includes an electric compressor 101, a liquid storage tank 103, a subcooler 105, a condenser 102, and a cooler 107. The output end of the electric compressor 101 is connected to the input end of the condenser 102, the output end of the condenser 102 is connected to the input end of the liquid storage tank 103, the first output end of the liquid storage tank 103 is connected to the first input end of the subcooler 105, and the second output end of the liquid storage tank 103 is connected to the second input end of the subcooler 105 through a second expansion valve 104. The two input ends are connected, the liquid storage tank 103 is used to store the refrigerant and receive the gaseous refrigerant flowing out of the condenser 102, the second output end of the liquid storage tank 103 is located at the top of the liquid storage tank 103, the first output end of the liquid storage tank 103 is located at the bottom of the liquid storage tank 103, the first output end of the subcooler 105 is connected to the input end of the cooler 107 through the first expansion valve 106, the second output end of the subcooler 105 is connected to the second input end of the electric compressor 101, and the output end of the cooler 107 is connected to the first input end of the electric compressor 101;

[0047] The coolant circuit includes a ten-way valve 204 and a proportional three-way valve 211. Port 1 of the ten-way valve 204 is connected to the outlet of the heater core 209-3 of the air conditioning box 209, port 2 of the ten-way valve 204 is connected to the inlet of the condenser 102, port 4 of the ten-way valve 204 is connected to the inlet of the air conditioning radiator 214, port 5 of the ten-way valve 204 is connected to the inlet of the cooler 107, and port 6 of the ten-way valve 204 is connected to the outlet of the refrigerator core 209-2 of the air conditioning box 209;

[0048] Port 1 of the proportional three-way valve 211 is connected to the outlet of the cooler 107 , port 2 of the proportional three-way valve 211 is connected to the inlet of the refrigerator core 209 - 2 of the air-conditioning box 209 , and port 3 of the proportional three-way valve 211 is connected to port 6 of the ten-way valve 204 .

[0049] In this embodiment, the electric compressor 101 is an electric compressor 101 with air-injection enthalpy-increasing function, and the electric compressor 101 is used to control the movement speed of the gaseous refrigerant in the refrigerant circuit based on the heat load of the vehicle. The first expansion valve 106 and the second expansion valve 104 are electronic expansion valves. Refrigerant flows in the refrigerant circuit, and the refrigerant exchanges heat with the coolant circuit through the condenser 102 and the cooler 107. The condenser 102 is used to release the heat of the gaseous refrigerant in the refrigerant to the coolant circuit, and the cooler 107 is used to convert the liquid refrigerant in the refrigerant into the gaseous refrigerant and absorb heat. The subcooler 105 is used to convert the liquid refrigerant flowing out of the second output end of the liquid storage tank 103 into the gaseous refrigerant flowing into the electric compressor 101, and cool the liquid refrigerant flowing out of the first output end of the liquid storage tank 103 to obtain the liquid refrigerant flowing into the first expansion valve 106;

[0050] The air-conditioning box 209 includes a refrigerator core 209-2, a heater core 209-3, and a blower 209-1. The inlet of the refrigerator core 209-2 is connected to port 2 of the proportional three-way valve 211, and the outlet of the refrigerator core 209-2 is connected to port 6 of the ten-way valve 204. The refrigerator core 209-2 is used to cool the passenger compartment using the low-temperature coolant. The inlet of the heater core 209-3 is connected to the outlet of the water heater 201, and the output end of the heater core 209-3 is connected to port 1 of the ten-way valve 204. The heater core 209-3 is used to heat the passenger compartment using the high-temperature coolant.

[0051] The opening of the first expansion valve 106 is controlled based on the superheat of the output end of the cooler 107 , and the opening of the second expansion valve 104 is controlled based on the superheat of the second output end of the subcooler 105 .

[0052] The refrigerant circulation process is as follows: the refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 passes through the subcooler 105 to be cooled again to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle.

[0053] The coolant circuit can be switched by adjusting the proportional three-way valve 211 and the ten-way valve 204. The high-temperature coolant is obtained by heat exchange with the gaseous refrigerant through the condenser 102, and the low-temperature coolant is obtained by heat exchange with the liquid refrigerant through the cooler 107. The low-temperature coolant flows through the refrigerator core 209-2 to realize cooling and dehumidification of the passenger compartment, and the high-temperature coolant flows through the heater core 209-3 in the air-conditioning box 209 to realize heating of the passenger compartment.

[0054] See also Figure 1 In one embodiment, port 3 of the ten-way valve 204 is connected to the inlet of the low-temperature radiator 215, port 7 of the ten-way valve 204 is connected to the inlet of the electric drive and DC-DC converter module 207, port 8 of the ten-way valve 204 is connected to the outlet of the electric drive and DC-DC converter module 207, port 9 of the ten-way valve 204 is connected to the outlet of the battery module 206, and port 10 of the ten-way valve 204 is connected to the inlet of the battery module 206.

[0055] In this embodiment, the coolant circuit also includes a water heater 201 and a fan 213. The fan 213 is installed at the position of the low-temperature radiator 215. The water heater 201 is connected to the heater core 209-3 of the air-conditioning box 209. The high-temperature or low-temperature coolant in the coolant circuit flows through the battery module 206 to heat or cool the battery module 206. Different heat sources can be utilized under low-temperature conditions. The waste heat of the electric drive and DC-DC converter module 207 can be used to heat the battery module 206, the low-temperature radiator 215 can be used to absorb heat from the environment, and the water heater 201 can be used to supplement heat. Under high-temperature conditions, the low-temperature radiator 215 is responsible for the low-water temperature heat dissipation of the electric drive and DC-DC converter module 207 and battery module 206 circuits, and the air-conditioning radiator 214 is responsible for heat exchange with the refrigerant circuit, and the temperature is relatively high. The two radiators work independently to effectively prevent high-temperature coolant from entering the electric drive and DC-DC converter module 207 or battery module 206 circuits, thereby improving heat exchange efficiency. In addition, the battery module 206 can also adopt the form of electric drive and DC-DC converter module 207 in series to realize that the battery module 206 uses the low-temperature radiator 215 to dissipate heat, which can save energy consumption generated by using the air-conditioning system.

[0056] See also Figure 1 In one embodiment, the cooling liquid circuit further comprises:

[0057] A first water pump 205 is connected in series between the ten-way valve 204 and the battery module 206;

[0058] A second water pump 202 is connected in series between the second port of the ten-way valve 204 and the condenser 102;

[0059] A third water pump 208 is connected in series between the 7th port of the ten-way valve 204 and the electric drive and DC-DC converter module 207;

[0060] The fourth water pump 210 is connected in series between the cooler 107 and the fifth port of the ten-way valve 204 .

[0061] See also Figure 1 In one embodiment, the refrigerant circuit further comprises:

[0062] A first low-pressure temperature sensor 302 is provided on a pipeline connected to the second output end of the subcooler 105 and is used to collect the temperature and pressure of the second output end of the subcooler 105;

[0063] A second low-pressure temperature sensor 303 is provided on a pipeline connected to the output end of the cooler 107 and is used to collect the temperature and pressure of the output end of the cooler 107;

[0064] A high-pressure temperature sensor 301 is provided on a pipeline connected to the output end of the electric compressor 101 and is used to collect the temperature and pressure of the output end of the electric compressor 101;

[0065] See also Figure 1 In one embodiment, the cooling liquid circuit further comprises:

[0066] a first expansion kettle 203, wherein the inlet of the first expansion kettle 203 is connected to the inlet of the low-temperature radiator 215 and the outlet of the condenser 102, and the outlet of the first expansion kettle 203 is connected to the inlet of the third water pump 208 and the inlet of the second water pump 202;

[0067] The second expansion kettle 212 has its inlet connected to the inlet of the fourth water pump 210 , and its outlet connected to the 5th port of the ten-way valve 204 and the refrigeration core 209 - 2 of the air-conditioning box 209 .

[0068] See also Figure 1 In one embodiment, the cooling liquid circuit further comprises:

[0069] A first water temperature sensor 304, which is connected to the outlet of the condenser 102 and is used to monitor the water temperature at the outlet of the condenser 102;

[0070] A second water temperature sensor 305, which is connected to the inlet of the battery module 206 and is used to monitor the water temperature at the inlet of the battery module 206;

[0071] A third water temperature sensor 306 is connected to the outlet of the electric drive and DC-DC converter module 207 and is used to monitor the water temperature at the outlet of the electric drive and DC-DC converter module 207;

[0072] The fourth water temperature sensor 307 is connected to the outlet of the cooler 107 and is used to monitor the water temperature at the outlet of the cooler 107 .

[0073] See also Figure 1 In one embodiment, a one-way valve 216 is provided between the 9th port of the ten-way valve 204 and the 10th port of the ten-way valve 204 .

[0074] See also Figure 1 In one embodiment, a controller is further included, which is connected to the coolant circuit and is used to control the working mode of the coolant circuit. Different working modes are used to cool down or heat up different components of the vehicle through the high-temperature coolant or the low-temperature coolant.

[0075] The controller can realize heat exchange of various components by controlling the ten-way valve 204, the proportional three-way valve 211 and the water pumps. The various achievable working modes include but are not limited to: passenger compartment cooling and electric drive cooling; electric drive cooling and battery cooling; passenger compartment cooling, electric drive cooling and battery cooling; passenger compartment heating and electric drive waste heat utilization; battery heating and electric drive waste heat utilization; passenger compartment heating, battery heating and electric drive waste heat utilization; passenger compartment heating and air source heat pump; battery heating and air source heat pump; passenger compartment heating, battery heating and air source heat pump; passenger compartment heating and dehumidification; outdoor radiator defrosting, etc.

[0076] In one embodiment, a system operation mode for passenger compartment cooling, electric drive cooling, and battery cooling is provided, such as Figure 2 As shown. This mode operates in an environment between 20°C and 40°C. The passenger compartment requires cooling, the electric drive is in a normal cooling cycle, and the battery temperature has reached the required temperature and requires cooling. The status of each component primarily includes: 10-way valve 204 has ports 2 and 4 connected, ports 3 and 8 connected, ports 5 and 9 connected, and ports 6 and 10 connected; ports 1, 2, and 3 of proportional three-way valve 211 are all connected; the first water pump 205, second water pump 202, third water pump 208, and fourth water pump 210 are all on; the water heater 201 is off; the electric compressor 101 is on; the fan 213 is on; and the blower 209-1 is on.

[0077] The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. The electric drive, along with the DC-DC converter module 207, low-temperature radiator 215, and third water pump 208, form a separate water circuit. The electric drive coolant absorbs heat from the electric drive and flows through the eight inlets and three outlets of the ten-way valve 204 before entering the low-temperature radiator 215 for dissipation. The cooling fan 213 operates, dissipating heat to the outside air. The refrigerant circuit operates normally. The speed of the electric compressor 101 is controlled by the air conditioning controller according to the control logic based on the vehicle's heat load. The first and second expansion valves 106 and 104 adjust the flow rate based on superheat and cooling capacity requirements. The low temperature side of the coolant circuit is composed of the coolant side of the cooler 107, the refrigerator core 209-2, the first water pump 205 and the fourth water pump 210. The cooling water is evaporated by the fourth water pump 210 through the refrigerant cooler 107 to absorb heat and cool down. It enters the refrigerator core 209-2 through the proportional three-way valve 211 to exchange heat with the hot air in the passenger compartment and absorb heat to cool the passenger compartment. Then, it passes through the 6-port inlet and 10-port outlet of the ten-way valve 204, mixes with the water in the battery circuit, cools the battery, and then passes through the ten-way valve 20 The 9 inlets and 5 outlets of the ten-way valve 204 flow into the fourth water pump 210. The proportional three-way valve 211 can adjust the proportion of cooling water entering the refrigerator core 209-2, thereby adjusting the cooling capacity distributed between the passenger compartment and the battery to meet the comfort requirements of the passenger compartment; the high-temperature side of the coolant circuit is composed of the second water pump 202, the water heater 201, the condenser 102, and the air-conditioning radiator 214. The cooling water absorbs heat through the condenser 102, passes through the 4 inlets and 2 outlets of the ten-way valve 204, and dissipates heat to the outside through the air-conditioning radiator 214.

[0078] In one embodiment, a working mode of the system under battery cooling and electric drive cooling is provided, such as Figure 3As shown, the status of each component mainly includes: port 2 and port 4 of the ten-way valve 204 are connected, port 3 and port 8 are connected, port 5 and port 9 are connected, port 6 and port 10 are connected, port 1 and port 3 of the proportional three-way valve 211 are connected, the status of the first water pump 205, the second water pump 202, the third water pump 208 and the fourth water pump 210 are all on, the status of the water heater 201 is off, the status of the electric compressor 101 is on, the status of the fan 213 is on, and the status of the blower 209-1 is off. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. On the coolant side, based on the passenger compartment cooling, electric drive cooling and battery cooling modes, the blower 209-1 is closed, and ports 1 and 3 of the proportional three-way valve 211 are connected. The cooling water cooled by the cooler 107 does not flow through the refrigerator core 209-2 but directly enters the battery for battery cooling.

[0079] In one embodiment, a system operation mode is provided for passenger compartment cooling and electric drive cooling. Figure 4The status of each component mainly includes: ports 5 and 6 of the ten-way valve 204 are connected, ports 3 and 8 are connected, and ports 2 and 4 are connected; ports 1 and 2 of the proportional three-way valve 211 are connected; the first water pump 205, the second water pump 202, the third water pump 208, and the fourth water pump 210 are all on; the water heater 201 is off; the electric compressor 101 is on; the fan 213 is on; and the blower 209-1 is on. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. On the coolant side, based on the passenger compartment cooling, electric drive cooling and battery cooling modes, the working state of the ten-way valve 204 is changed to a connection between port 5 and port 6, and the proportional three-way valve 211 is changed to a connection between port 1 and port 2. The cooling water flowing out of the refrigerator core 209-2 flows directly into the fourth water pump 210 through the 6-port inlet and 5-port outlet of the ten-way valve 204 without passing through the battery module 206.

[0080] In one embodiment, a system operation mode is provided for passenger compartment heating, battery heating, and electric drive waste heat utilization, such as Figure 5The operating environment of this mode is -30°C to 0°C. The status of each component mainly includes: ports 1 and 10 of the ten-way valve 204 are connected, ports 2 and 9 are connected, ports 5 and 8 are connected, and ports 6 and 7 are connected. Ports 1 and 3 of the proportional three-way valve 211 are connected. The first water pump 205, the second water pump 202, the third water pump 208, and the fourth water pump 210 are all turned on. The status of the water heater 201 is adjusted according to the cooling water temperature on the condenser 102 side. The electric compressor 101 is turned on, the fan 213 is turned off, and the blower 209-1 is turned on. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. The refrigerant then flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 passes through the second expansion valve 104 and enters the subcooler 105, where it evaporates and absorbs heat, changing from a gas-liquid mixed state to a gaseous state. The refrigerant then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the degree of subcooling. It then passes through the first expansion valve 106 and enters the coolant cooler 107, where it evaporates and absorbs heat with the coolant circuit to cool the coolant. The refrigerant then flows out of the cooler 107 and enters the intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port, forming a refrigerant circuit. The speed of the electric compressor 101 is controlled by the air conditioning controller according to the control logic based on the heat load of the entire vehicle. The first expansion valve 106 and the second expansion valve 104 adjust the flow rate according to the superheat and heating demand. The low-temperature side of the coolant circuit is composed of the coolant side of the cooler 107, the electric drive, the third water pump 208 and the fourth water pump 210. The cooling water is evaporated by the fourth water pump 210 through the cooler 107 to absorb heat, passes through the 1st inlet and 3rd outlet of the proportional three-way valve 211, and then passes through the 6th inlet and 7th outlet of the ten-way valve 204, enters the electric drive and DC-DC converter module 207 through the third water pump 208 to absorb the waste heat of the electric drive, and then flows into the fourth water pump 210 through the 8th inlet and 5th outlet of the ten-way valve 204 to complete the waste heat utilization of the electric drive; the high-temperature side of the coolant circuit is cooled by the condenser 102 The liquid side, the water heater 201, the first water pump 205, the second water pump 202, the heater core 209-3, and the battery module 206 are composed of the cooling water. The cooling water is supplied from the second water pump 202 through the condenser 102 to absorb heat, and then enters the heater core 209-3 through the water heater 201 to exchange heat with the cold air in the passenger compartment to release heat, thereby heating the passenger compartment. The cooling water passes through the 1-port inlet and the 10-port outlet of the ten-way valve 204, mixes with the water in the battery circuit, heats the battery, and then flows into the second water pump 202 through the 9-port inlet and the 2-port outlet of the ten-way valve 204 to complete the heating of the passenger compartment and the battery.

[0081] In one embodiment, a working mode of the system under battery heating and electric drive waste heat utilization is provided, such as Figure 6The status of each component mainly includes: port 1 and port 10 of the ten-way valve 204 are connected, port 2 and port 9 are connected, port 5 and port 8 are connected, and port 6 and port 7 are connected; port 1 and port 3 of the proportional three-way valve 211 are connected; the first water pump 205, the second water pump 202, the third water pump 208, and the fourth water pump 210 are all in the on state; the status of the water heater 201 is adjusted according to the cooling water temperature on the condenser 102 side; the status of the electric compressor 101 is on; the status of the fan 213 is off; and the status of the blower 209-1 is off. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. On the coolant side, the blower 209-1 is turned off based on the passenger compartment heating, battery heating and electric drive waste heat utilization modes. The cooling water flowing out of the condenser 102 passes through the heater core 209-3 without heating the passenger compartment, but only heating the battery.

[0082] In one embodiment, a working mode of the system is provided for passenger cabin heating and electric drive waste heat utilization, such as Figure 7The status of each component mainly includes: ports 1 and 2 of the ten-way valve 204 are connected, ports 5 and 8 are connected, and ports 6 and 7 are connected; ports 1 and 3 of the proportional three-way valve 211 are connected; the second water pump 202, the third water pump 208, and the fourth water pump 210 are all on; the first water pump 205 is off; the status of the water heater 201 is adjusted according to the cooling water temperature on the condenser 102 side; the electric compressor 101 is on; the fan 213 is off; and the blower 209-1 is on. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. On the coolant side, based on the passenger compartment heating, battery heating and electric drive waste heat utilization modes, the working state of the ten-way valve 204 is changed to port 1 being connected to port 2, port 5 being connected to port 8, and port 6 being connected to port 7. The cooling water flowing out of the heater core 209-3 flows directly into the second water pump 202 through the ten-way valve 204 without passing through the battery.

[0083] In one embodiment, a system is provided with a working mode of passenger cabin heating, battery heating and air source heat pump, such as Figure 8The operating environment of this mode is 0°C to 20°C. The status of each component mainly includes: ports 1 and 10 of the ten-way valve 204 are connected, ports 2 and 9 are connected, ports 3 and 6 are connected, and ports 5 and 8 are connected. Ports 1 and 3 of the proportional three-way valve 211 are connected. The first water pump 205, the second water pump 202, the third water pump 208, and the fourth water pump 210 are all on. The water heater 201 is off, the electric compressor 101 is on, the fan 213 is on, and the blower 209-1 is on. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. The refrigerant then flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104, where it evaporates and absorbs heat, changing from a gas-liquid mixed state to a gaseous state. The refrigerant then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the degree of subcooling. It then enters the coolant circuit 107 through the first expansion valve 106, where it evaporates and absorbs heat from the coolant circuit to cool the coolant. The refrigerant then flows out of the cooler 107 and enters the intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port, forming a refrigerant circuit. The speed of the electric compressor 101 is controlled by the air conditioning controller according to the control logic based on the heat load of the entire vehicle. The first and second electronic expansion valves adjust the flow rate according to the superheat and heating demand. The low-temperature side of the coolant circuit is composed of the coolant side of the cooler 107, the electric drive, the low-temperature radiator 215, the third water pump 208 and the fourth water pump 210. The cooling water is evaporated by the fourth water pump 210 through the cooler 107 to absorb heat, passes through the 1-port inlet and 3-port outlet of the proportional three-way valve 211, and then passes through the 6-port inlet and 3-port outlet of the ten-way valve 204, absorbs the heat from the air side through the low-temperature radiator 215, enters the electric drive and DC-DC converter module 207 through the third water pump 208 to absorb the waste heat of the electric drive, and then flows into the fourth water pump 210 through the 8-port inlet and 5-port outlet of the ten-way valve 204, completing the air source heat pump heat absorption; The high-temperature side of the cooling liquid circuit is composed of the coolant side of the condenser 102, the water heater 201, the first water pump 205, the second water pump 202, the heater core 209-3, and the battery. The cooling water is supplied by the second water pump 202 through the condenser 102 to absorb heat, and then enters the heater core 209-3 through the water heater 201 to exchange heat with the cold air in the passenger compartment to release heat, thereby heating the passenger compartment. The water is mixed with the water in the battery circuit through the 1-inlet and 10-outlet of the ten-way valve 204 to heat the battery, and then flows into the second water pump 202 through the 9-inlet and 2-outlet of the ten-way valve 204 to complete the heating of the passenger compartment and the battery.

[0084] In one embodiment, a working mode of the system under battery heating and air source heat pump is provided, such as Figure 9The status of each component mainly includes: port 1 and port 10 of the ten-way valve 204 are connected, port 2 and port 9 are connected, port 3 and port 6 are connected, and port 5 and port 8 are connected; port 1 and port 3 of the proportional three-way valve 211 are connected; the first water pump 205, the second water pump 202, the third water pump 208, and the fourth water pump 210 are all on; the water heater 201 is off; the electric compressor 101 is on; the fan 213 is off; and the blower 209-1 is off. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. The coolant turns off the blower 209-1 based on the passenger compartment heating, battery heating and air source heat pump modes, and the cooling water flowing out of the condenser 102 passes through the heater core 209-3 without heating the passenger compartment, but only heating the battery.

[0085] In one embodiment, a system is provided for operating in passenger cabin heating and air source heat pump mode, such as Figure 10The status of each component mainly includes: ports 1 and 2 of the ten-way valve 204 are connected, ports 3 and 6 are connected, and ports 5 and 8 are connected; ports 1 and 3 of the proportional three-way valve 211 are connected; the second water pump 202, the third water pump 208, and the fourth water pump 210 are all on; the first water pump 205 is off; the water heater 201 is off; the electric compressor 101 is on; the fan 213 is on; and the blower 209-1 is on. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. On the coolant side, based on the passenger compartment heating, battery heating and air source heat pump modes, the working state of the ten-way valve 204 is changed to port 1 being connected to port 2, port 5 being connected to port 8, and port 6 being connected to port 7. The cooling water flowing out of the heater core 209-3 flows directly into the second water pump 202 through the ten-way valve 204 without passing through the battery.

[0086] In one embodiment, a working mode of the system under heating and dehumidification is provided, such as Figure 11The operating environment of this mode is -5°C to 20°C. In this working mode, the working states of the components include: ports 1 and 2 of the ten-way valve 204 are connected, ports 3 and 6 are connected, and ports 5 and 8 are connected; ports 1 and 2 of the proportional three-way valve 211 are both connected; the second water pump 202, the third water pump 208, and the fourth water pump 210 are all on; the first water pump 205 is off; the water heater 201 is off; the electric compressor 101 is on; the fan 213 is on; and the blower 209-1 is on. The refrigerant is discharged from the exhaust port of the electric compressor 101, enters the water-cooled condenser 102, and is heated by heat exchange with the coolant circuit. Then the refrigerant flows into the liquid storage tank 103. The gaseous or gas-liquid mixed refrigerant at the upper end of the liquid storage tank 103 enters the subcooler 105 through the second expansion valve 104 for evaporation and heat absorption, and changes from a gas-liquid mixed state to a gas state, and then enters the air supply port of the electric compressor 101. The liquid refrigerant in the liquid storage tank 103 is cooled again by the subcooler 105 to increase the supercooling degree, and enters the cooler 107 through the first expansion valve 106 to evaporate and absorb heat with the coolant circuit to cool the coolant, and then flows out of the cooler 107 and enters the air intake port of the electric compressor 101. After being compressed by the electric compressor 101, it is discharged from the exhaust port to form a refrigerant circuit cycle. This mode is mainly used when heating is needed at low temperatures and the humidity is high, and when there is a large temperature difference between the inside and outside of the cab. At this time, the passenger compartment is heated through the heat pump mode, and at the same time, the low-temperature coolant flows into the refrigerator core 209-2 circuit through the proportional three-way valve 211, and the humid air in the passenger compartment is condensed into water in the air-conditioning box 209, and discharged from the passenger compartment through the drain pipe of the air-conditioning box 209, thereby realizing the dehumidification function.

[0087] In one embodiment, a working mode of the system under driving defrosting conditions is provided, such as Figure 12 As shown. In this operating mode, the operating states of various components include: ports 3 and 8 of the ten-way valve 204 are connected, the proportional three-way valve 211, the first water pump 205, the second water pump 202, and the fourth water pump 210 are all off, the third water pump 208 is on, the water heater 201 (WPTC) 201 is off, the electric compressor 101 is off, the fan 213 is on, and the blower 209-1 is off. In this mode, waste heat from the electric drive is used to heat the cooling water to defrost the low-temperature radiator 215.

[0088] In one embodiment, a working mode of the system under electric drive cooling conditions is provided, such as Figure 12As shown. In this operating mode, the operating states of various components include: ports 3 and 8 of the ten-way valve 204 are connected, the proportional three-way valve 211, the first water pump 205, the second water pump 202, and the fourth water pump 210 are all off, the third water pump 208 is on, the water heater 201 is off, the electric compressor 101 is off, the fan 213 is on, and the blower 209-1 is off. In this mode, the electric drive alone is cooled while the air conditioning system is inoperative, resulting in low system energy consumption.

[0089] In one embodiment, a working mode of the system is provided under the condition of electric drive and battery series heat dissipation. Figure 13 As shown. In this operating mode, the operating states of various components include: ports 3 and 9 of the ten-way valve 204 are connected, ports 8 and 10 are connected, the proportional three-way valve 211, the first water pump 205, the second water pump 202, and the fourth water pump 210 are all off, the third water pump 208 is on, the water heater 201 is off, the electric compressor 101 is off, the fan 213 is on, and the blower 209-1 is off. In this mode, the electric drive and battery are connected in series for heat dissipation, resulting in low system energy consumption.

[0090] The present invention provides a new energy vehicle thermal management system that utilizes a secondary heat exchange circuit design. The flammable propane refrigerant circuit is located in the engine compartment, while the cab is heated and cooled via a coolant circuit. This effectively improves the safety of the propane air conditioning system. The refrigerant circuit utilizes an air-injection enthalpy-increasing system, effectively increasing system supercooling, improving the system COP, and enhancing system heating efficiency. The coolant circuit utilizes a ten-way valve 204, a proportional three-way valve 211, a water pump, and a heat exchanger to achieve various operating modes, enabling hierarchical energy utilization, improving system efficiency, and reducing vehicle energy consumption. The system utilizes a dual outdoor radiator solution to avoid poor heat dissipation caused by large temperature differences between different heat sources. Furthermore, the system is highly scalable and adaptable to a variety of refrigerants.

[0091] The present invention also provides an automobile, including a thermal management system for a new energy automobile.

[0092] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be embraced herein, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0093] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A thermal management system for a new energy vehicle, characterized in that: The refrigerant circuit includes a refrigerant circuit and a coolant circuit, wherein the refrigerant circuit includes an electric compressor, a liquid storage tank, a subcooler, a condenser, and a cooler, wherein the output end of the electric compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of the liquid storage tank, the first output end of the liquid storage tank is connected to the first input end of the subcooler, the second output end of the liquid storage tank is connected to the second input end of the subcooler through a second expansion valve, the liquid storage tank is used to store the refrigerant, the second output end of the liquid storage tank is located at the top of the liquid storage tank, the first output end of the subcooler is connected to the input end of the cooler through a first expansion valve, the second output end of the subcooler is connected to the second input end of the electric compressor, and the output end of the cooler is connected to the first input end of the electric compressor; The coolant circuit includes a ten-way valve and a proportional three-way valve, wherein port 1 of the ten-way valve is connected to the outlet of the air conditioning box heater core, port 2 of the ten-way valve is connected to the inlet of the condenser, port 4 of the ten-way valve is connected to the inlet of the air conditioning radiator, port 5 of the ten-way valve is connected to the inlet of the cooler, and port 6 of the ten-way valve is connected to the outlet of the air conditioning box refrigerator core; Port 1 of the proportional three-way valve is connected to the outlet of the cooler, port 2 of the proportional three-way valve is connected to the inlet of the air-conditioning box refrigeration core, and port 3 of the proportional three-way valve is connected to port 6 of the ten-way valve; Port 3 of the ten-way valve is connected to the inlet of the low-temperature radiator, port 7 of the ten-way valve is connected to the inlet of the electric drive and DC-DC converter module, port 8 of the ten-way valve is connected to the outlet of the electric drive and DC-DC converter module, port 9 of the ten-way valve is connected to the outlet of the battery module, and port 10 of the ten-way valve is connected to the inlet of the battery module; The coolant circuit also includes: a first water pump connected in series between port 10 of the ten-way valve and the battery module; a second water pump connected in series between port 2 of the ten-way valve and the condenser; a third water pump connected in series between port 7 of the ten-way valve and the electric drive and DC-DC converter module; a fourth water pump connected in series between the cooler and port 5 of the ten-way valve; The coolant circuit also includes: a first expansion kettle, wherein the inlet of the first expansion kettle is connected to the inlet of the low-temperature radiator and the outlet of the condenser, and the outlet of the first expansion kettle is connected to the inlet of the third water pump and the inlet of the second water pump; a second expansion kettle, wherein the inlet of the second expansion kettle is connected to the inlet of the fourth water pump, and the outlet of the second expansion kettle is connected to the five ports of the ten-way valve and the refrigeration core of the air-conditioning box; The opening degree of the first expansion valve is controlled based on the superheat degree of the output end of the cooler, and the opening degree of the second expansion valve is controlled based on the superheat degree of the second output end of the subcooler.

2. A thermal management system for a new energy vehicle according to claim 1, characterized in that: The refrigerant circuit further includes: a first low-pressure temperature sensor, provided on a pipeline connected to the second output end of the subcooler, for collecting the temperature and pressure of the second output end of the subcooler; a second low-pressure temperature sensor, provided on a pipeline connected to the output end of the cooler, for collecting the temperature and pressure of the output end of the cooler; The high-pressure temperature sensor is arranged on the pipeline connected to the output end of the electric compressor and is used to collect the temperature and pressure of the output end of the electric compressor.

3. The thermal management system of a new energy vehicle according to claim 1, characterized in that: The coolant circuit also includes: a first water temperature sensor connected to the condenser outlet; a second water temperature sensor connected to an inlet of the battery module; a third water temperature sensor connected to the outlet of the electric drive and DC-DC converter module; A fourth water temperature sensor is connected to the cooler outlet.

4. The thermal management system of a new energy vehicle according to claim 1, characterized in that: A one-way valve is provided between the 9th port of the ten-way valve and the 10th port of the ten-way valve.

5. A thermal management system for a new energy vehicle according to any one of claims 1 to 4, characterized in that: It also includes a controller, which is connected to the coolant circuit and is used to control the working mode of the coolant circuit.

6. A car, characterized in that: A thermal management system for a new energy vehicle comprising the thermal management system as described in any one of claims 1 to 5.

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