Electric vehicle thermal management system based on double multi-way valves

Abstract

The invention is applicable to the technical field of electric vehicle thermal management, and provides an electric vehicle thermal management system based on double multi-way valves, which comprises a refrigerant management module, a passenger compartment thermal management module, a battery pack thermal management module, an electric drive thermal management module and a low-temperature radiator module. According to the system, all management modules on the cooling liquid side are integrated by introducing a five-way water valve. And a fully indirect heat pump technology is applied, so that the safety risk caused by leakage of a novel environment-friendly refrigerant is effectively reduced. Function exchange of the first heat exchanger and the second heat exchanger is achieved by means of the refrigerant four-way valve, a refrigerant and cooling liquid flow reversely during refrigeration, the refrigerant and the cooling liquid flow smoothly during heating, and the requirement for a five-way water valve development mode is greatly reduced. And by introducing the gas-liquid separator, normal work of the compressor is ensured, and the performance of the heat pump is improved. Various requirements of refrigeration and heating, waste heat utilization, dehumidification and defrosting and the like are fully met in cooperation with a five-way water valve, a cooling liquid side loop is simplified, and the system cost is effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal management of electric vehicles, and in particular relates to a thermal management system of an electric vehicle based on a dual multi-way valve. Background Art

[0002] The thermal management of electric vehicles is mainly aimed at the heat control technology of new power systems such as electric vehicles, covering multiple key links such as heat dissipation, cooling, heating and temperature control. Compared with the thermal management objects of traditional fuel vehicles, which are systems such as engines, transmissions and air conditioners, the thermal management of new energy vehicles has added thermal management objects such as power batteries and electric drives.

[0003] As the concept of environmental protection has gained popularity, new environmentally friendly refrigerants are increasingly used in the field of electric vehicles. The application of fully indirect heat pump technology can largely solve the potential safety hazards that may be caused by refrigerant leakage, such as harm to human health and fire. Water circuit integration solutions are widely used in electric vehicle thermal management systems, which are beneficial in improving the heat transfer efficiency of coolant between modules, simplifying circuits, and reducing energy loss. However, how to achieve the conversion of different cooling and heating requirements of the system, and based on this, integrate the thermal management system is still a problem that needs to be improved. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide an electric vehicle thermal management system based on a dual multi-way valve, aiming to solve the problems raised in the above background technology.

[0005] The embodiment of the present invention is implemented as follows: an electric vehicle thermal management system based on a dual multi-way valve includes a refrigerant management module, a passenger compartment thermal management module, a battery pack thermal management module, an electric drive thermal management module and a low-temperature radiator module;

[0006] The refrigerant management module includes a compressor, a refrigerant four-way valve, a first heat exchanger, a two-way electronic expansion valve, a second heat exchanger and a gas-liquid separator, wherein the first heat exchanger and the second heat exchanger both have a refrigerant side and a coolant side, the outlet end of the compressor is connected to port No. 2 of the refrigerant four-way valve, port No. 1 of the refrigerant four-way valve is connected to port No. 2 of the refrigerant side of the first heat exchanger, port No. 1 of the refrigerant side of the first heat exchanger is connected to one end of the two-way electronic expansion valve, the other end of the two-way electronic expansion valve is connected to port No. 1 of the refrigerant side of the second heat exchanger, port No. 2 of the refrigerant side of the second heat exchanger is connected to port No. 3 of the refrigerant four-way valve, port No. 4 of the refrigerant four-way valve is connected to the inlet of the gas-liquid separator, and the outlet of the gas-liquid separator is connected to the inlet of the compressor;

[0007] The passenger compartment thermal management module includes a five-way water valve, a coolant side of a first heat exchanger, a first water pump, a blower in a passenger compartment HVAC assembly, a first core in the passenger compartment HVAC assembly, a second core in the passenger compartment HVAC assembly, and a proportional three-way valve, wherein port No. 1 of the five-way water valve is connected to port No. 1 of the coolant side of the first heat exchanger, port No. 2 of the coolant side of the first heat exchanger is connected to the inlet of the first water pump, the outlet of the first water pump is connected to the first core in the passenger compartment HVAC assembly, the outlet of the first core in the passenger compartment HVAC assembly is connected to port No. 3 of the proportional three-way valve, and port No. 2 of the proportional three-way valve is connected to port No. 5 of the five-way water valve; the blower in the passenger compartment HVAC assembly is arranged in front of the first core in the passenger compartment HVAC assembly; the second core in the passenger compartment HVAC assembly is arranged behind the first core in the passenger compartment HVAC assembly;

[0008] The battery pack thermal management module includes a third water pump and a battery pack, wherein the inlet of the third water pump is connected to port No. 3 of the proportional three-way valve, the outlet of the third water pump is connected to the coolant inlet of the battery pack, and the coolant outlet of the battery pack is connected to port No. 1 of the proportional three-way valve;

[0009] The electric drive thermal management module includes a fourth water pump and an electric drive, wherein the inlet of the fourth water pump is connected to port No. 3 of the five-way water valve, the outlet of the fourth water pump is connected to the coolant inlet of the electric drive, and the coolant outlet of the electric drive is connected to port No. 4 of the five-way water valve;

[0010] The low-temperature radiator module includes a low-temperature radiator, a second water pump, a coolant side of a second heat exchanger and a three-way valve, wherein port No. 1 of the coolant side of the second heat exchanger is connected to port No. 2 of the five-way water valve, port No. 2 of the coolant side of the second heat exchanger is connected to the inlet of the second water pump, the outlet of the second water pump is connected to port No. 1 of the three-way valve, port No. 3 of the three-way valve is connected to the inlet of the low-temperature radiator, and the outlet of the low-temperature radiator is connected to port No. 3 of the five-way water valve.

[0011] According to a further technical solution, a first temperature and pressure sensor is provided on the pipeline connecting the outlet of the compressor and the refrigerant four-way valve, a second temperature and pressure sensor is provided on the pipeline connecting the inlet of the compressor and the refrigerant four-way valve, and the second temperature and pressure sensor is placed between the gas-liquid separator and the compressor.

[0012] A further technical solution is that a first temperature sensor is provided at the air outlet of the first core in the passenger compartment HVAC assembly, a second temperature sensor is provided at the air outlet of the second core in the passenger compartment HVAC assembly, a third temperature sensor is provided at the coolant inlet of the battery pack, and the third temperature sensor is provided on the pipeline connecting the coolant outlet of the battery pack and the inlet of the third water pump, a fourth temperature sensor is provided at the coolant outlet of the battery pack, and the fourth temperature sensor is provided on the pipeline between the battery pack and port No. 1 of the proportional three-way valve, a fifth temperature sensor is provided at the coolant outlet of the electric drive, and the fifth temperature sensor is provided on the pipeline between the electric drive and port No. 4 of the five-way water valve, a sixth temperature sensor is provided at the coolant side outlet of the second heat exchanger, and the sixth temperature sensor is provided on the pipeline between the coolant side outlet of the second heat exchanger and the inlet of the second water pump, a seventh temperature sensor is provided at the coolant side outlet of the first heat exchanger, and the seventh temperature sensor is provided on the pipeline between the coolant side outlet of the first heat exchanger and the inlet of the first water pump.

[0013] According to a further technical solution, both the first heat exchanger and the second heat exchanger are plate heat exchangers.

[0014] A further technical solution also includes a first water kettle and a second water kettle, wherein the inlet of the first water kettle is connected to the inlet of the fourth water pump, the outlet of the first water kettle is connected to the outlet of the electric drive coolant, the inlet of the second water kettle is connected to the inlet of the third water pump, and the outlet of the second water kettle is connected to the outlet of the battery pack coolant.

[0015] According to a further technical solution, an active air intake grille is installed at the low-temperature radiator.

[0016] An electric vehicle thermal management system based on a dual multi-way valve provided by an embodiment of the present invention has the following beneficial effects:

[0017] (1) The system uses cleverly designed connecting pipes to achieve countercurrent flow of refrigerant and coolant during cooling and concurrent flow of refrigerant and coolant during heating, thereby improving the heat exchange effect. The system also introduces a gas-liquid separator and active air intake grille to ensure the normal operation of the compressor, reduce heat loss, and improve energy utilization efficiency.

[0018] (2) The system reduces the working mode of the five-way water valve while meeting the requirements of various thermal management modules, which facilitates the development of the five-way water valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a thermal management system for an electric vehicle based on a dual multi-way valve provided in an embodiment of the present invention;

[0020] Figure 2A schematic diagram of a system cycle of a thermal management system for an electric vehicle based on a dual multi-way valve in a passenger compartment heating, battery-free, and electric drive waste heat utilization mode provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a system cycle of an electric vehicle thermal management system based on a dual multi-way valve in passenger compartment heating, battery heating, and electric drive waste heat utilization modes provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a system cycle of a thermal management system for an electric vehicle based on a dual multi-way valve in a passenger compartment-free, battery heating, and electric drive reduced efficiency heating mode provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a system cycle of an electric vehicle thermal management system based on a dual multi-way valve in a passenger compartment dehumidification, battery heating, and electric drive waste heat utilization mode provided by an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a system cycle of a thermal management system for an electric vehicle based on a dual multi-way valve in a passenger compartment dehumidification, battery-free, and electric drive waste heat utilization mode provided by an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of a system cycle of an electric vehicle thermal management system based on a dual multi-way valve in a driving defrosting mode provided by an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of a system cycle of a thermal management system for an electric vehicle based on a dual multi-way valve in passenger compartment-free, battery cooling, and electric drive heat dissipation modes provided by an embodiment of the present invention;

[0027] Fig. 9 A schematic diagram of a system cycle of an electric vehicle thermal management system based on a dual multi-way valve in passenger compartment cooling, battery cooling, and electric drive heat dissipation modes provided by an embodiment of the present invention;

[0028] Fig.10 A schematic diagram of a system cycle of a thermal management system for an electric vehicle based on a dual multi-way valve in a passenger compartment cooling, battery-free, and electric drive cooling mode provided by an embodiment of the present invention;

[0029] Fig.11 A schematic diagram of a system cycle of an electric vehicle thermal management system based on a dual multi-way valve in an electric drive heat storage mode provided by an embodiment of the present invention;

[0030] Fig.12 A schematic diagram of a system cycle of an electric vehicle thermal management system based on a dual multi-way valve in a battery temperature equalization mode provided in an embodiment of the present invention.

[0031] In the attached figure: 1-refrigerant four-way valve; 2-first heat exchanger; 3-two-way electronic expansion valve; 4-second heat exchanger; 5-compressor; 6-first water pump; 7-first core in passenger compartment HVAC assembly; 8-second core in passenger compartment HVAC assembly; 9-three-way valve; 10-second water pump; 11-third water pump; 12-battery pack; 13-proportional three-way valve; 14-low-temperature radiator; 15-fourth water pump; 16-electric drive; 17-first temperature and pressure sensor; 18-second temperature and pressure sensor; 19-first temperature sensor; 20-second temperature sensor; 21-third temperature sensor; 22-fourth temperature sensor; 23-fifth temperature sensor; 24-sixth temperature sensor; 25-seventh temperature sensor; 26-five-way water valve; 27-blower in passenger compartment HVAC assembly; 28-first kettle; 29-second kettle; 30-gas-liquid separator. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0034] like Figure 1 As shown, an electric vehicle thermal management system based on a dual multi-way valve is provided in one embodiment of the present invention, including a refrigerant management module, a passenger compartment thermal management module, a battery pack thermal management module, an electric drive thermal management module and a low-temperature radiator module;

[0035] The refrigerant management module includes a compressor 5, a refrigerant four-way valve 1, a first heat exchanger 2, a two-way electronic expansion valve 3, a second heat exchanger 4 and a gas-liquid separator 30, wherein the first heat exchanger 2 and the second heat exchanger 4 both have a refrigerant side and a coolant side, the outlet end of the compressor 5 is connected to port No. 2 of the refrigerant four-way valve 1, port No. 1 of the refrigerant four-way valve 1 is connected to port No. 2 of the refrigerant side of the first heat exchanger 2, port No. 1 of the refrigerant side of the first heat exchanger 2 is connected to one end of the two-way electronic expansion valve 3, the other end of the two-way electronic expansion valve 3 is connected to port No. 1 of the refrigerant side of the second heat exchanger 4, port No. 2 of the refrigerant side of the second heat exchanger 4 is connected to port No. 3 of the refrigerant four-way valve 1, port No. 4 of the refrigerant four-way valve 1 is connected to the inlet of the gas-liquid separator 30, and the outlet of the gas-liquid separator 30 is connected to the inlet of the compressor 5;

[0036] The passenger compartment thermal management module includes a five-way water valve 26, a coolant side of the first heat exchanger 2, a first water pump 6, a first core 7 in the passenger compartment HVAC assembly, a second core 8 in the passenger compartment HVAC assembly, a proportional three-way valve 13, and a blower 27 in the passenger compartment HVAC assembly, wherein port No. 1 of the five-way water valve 26 is connected to port No. 1 of the coolant side of the first heat exchanger 2, port No. 2 of the coolant side of the first heat exchanger 2 is connected to the inlet of the first water pump 6, and the first water The outlet of the pump 6 is connected to the first core 7 in the passenger compartment HVAC assembly, the outlet of the first core 7 in the passenger compartment HVAC assembly is connected to the No. 3 port of the proportional three-way valve 13, and the No. 2 port of the proportional three-way valve 13 is connected to the No. 5 port of the five-way water valve 26; the blower 27 in the passenger compartment HVAC assembly is arranged in front of the first core 7 in the passenger compartment HVAC assembly; the second core 8 in the passenger compartment HVAC assembly is arranged behind the first core 7 in the passenger compartment HVAC assembly;

[0037] The battery pack thermal management module includes a third water pump 11 and a battery pack 12, wherein the inlet of the third water pump 11 is connected to port No. 3 of the proportional three-way valve 13, the outlet of the third water pump 11 is connected to the coolant inlet of the battery pack 12, and the coolant outlet of the battery pack 12 is connected to port No. 1 of the proportional three-way valve 13;

[0038] The electric drive thermal management module includes a fourth water pump 15 and an electric drive 16, wherein the inlet of the fourth water pump 15 is connected to the No. 3 port of the five-way water valve 26, the outlet of the fourth water pump 15 is connected to the coolant inlet of the electric drive 16, and the coolant outlet of the electric drive 16 is connected to the No. 4 port of the five-way water valve 26;

[0039] The low-temperature radiator module includes a low-temperature radiator 14, a second water pump 10, a coolant side of a second heat exchanger 4 and a three-way valve 9, wherein port No. 1 of the coolant side of the second heat exchanger 4 is connected to port No. 2 of the five-way water valve 26, port No. 2 of the coolant side of the second heat exchanger 4 is connected to the inlet of the second water pump 10, the outlet of the second water pump 10 is connected to port No. 1 of the three-way valve 9, port No. 3 of the three-way valve 9 is connected to the inlet of the low-temperature radiator 14, and the outlet of the low-temperature radiator 14 is connected to port No. 3 of the five-way water valve 26.

[0040] like Figure 1 As shown, as a preferred embodiment of the present invention, a first temperature and pressure sensor 17 is arranged on the pipeline connecting the outlet of the compressor 5 and the refrigerant four-way valve 1, and a second temperature and pressure sensor 18 is arranged on the pipeline connecting the inlet of the compressor 5 and the refrigerant four-way valve 1, and the second temperature and pressure sensor 18 is placed between the gas-liquid separator 30 and the compressor 5.

[0041] like Figure 1 As shown, as a preferred embodiment of the present invention, a first temperature sensor 19 is provided at the air outlet of the first core 7 in the passenger compartment HVAC assembly, a second temperature sensor 20 is provided at the air outlet of the second core 8 in the passenger compartment HVAC assembly, a third temperature sensor 21 is provided at the coolant inlet of the battery pack 12, and the third temperature sensor 21 is provided on the pipeline connecting the coolant outlet of the battery pack 12 and the inlet of the third water pump 11, a fourth temperature sensor 22 is provided at the coolant outlet of the battery pack 12, and the fourth temperature sensor 22 is provided on the pipeline between the battery pack 12 and port No. 1 of the proportional three-way valve 13, A fifth temperature sensor 23 is provided at the coolant outlet of the electric drive 16, and the fifth temperature sensor 23 is provided on the pipeline between the electric drive 16 and port No. 4 of the five-way water valve 26. A sixth temperature sensor 24 is provided at the coolant side outlet of the second heat exchanger 4 (i.e., port No. 2 on the coolant side), and the sixth temperature sensor 24 is provided on the pipeline between the coolant side outlet of the second heat exchanger 4 and the inlet of the second water pump 10. A seventh temperature sensor 25 is provided at the coolant side outlet of the first heat exchanger 2 (i.e., port No. 2 on the coolant side), and the seventh temperature sensor 25 is provided on the pipeline between the coolant side outlet of the first heat exchanger 2 and the inlet of the first water pump 6.

[0042] like Figure 1 As shown, as a preferred embodiment of the present invention, the first heat exchanger 2 and the second heat exchanger 4 are both plate heat exchangers.

[0043] like Figure 1 As shown, as a preferred embodiment of the present invention, it also includes a first water kettle 28 and a second water kettle 29, the inlet of the first water kettle 28 is connected to the inlet of the fourth water pump 15, the outlet of the first water kettle 28 is connected to the coolant outlet of the electric drive 16, the inlet of the second water kettle 29 is connected to the inlet of the third water pump 11, and the outlet of the second water kettle 29 is connected to the coolant outlet of the battery pack 12.

[0044] like Figure 1 As shown, as a preferred embodiment of the present invention, the low-temperature radiator 14 is equipped with an active air intake grille.

[0045] like Figure 2As shown, as a preferred embodiment of the present invention, in the passenger compartment heating, battery-free, electric drive 16 waste heat utilization mode, the first water pump 6 is started and turned on 27, and the coolant enters the coolant side port No. 1 of the first heat exchanger 2 under the drive of the first water pump 6, flows out through the coolant side port No. 2 of the first heat exchanger 2 and enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly and enters the No. 3 port of the proportional three-way valve 13, flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2;

[0046] Start the second water pump 10 and the fourth water pump 15. Driven by the second water pump 10, the coolant enters the No. 1 port on the coolant side of the second heat exchanger 4, flows out through the No. 2 port on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the No. 1 port of the three-way valve 9, flows out through the No. 3 port of the three-way valve 9 and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0047] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 1 on the refrigerant side of the first heat exchanger 2, flows out through port No. 2 on the refrigerant side of the first heat exchanger 2 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 1 on the refrigerant side of the second heat exchanger 4, flows out through port No. 2 on the refrigerant side of the second heat exchanger 4 and enters port No. 3 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0048] like Figure 3As shown, as a preferred embodiment of the present invention, in the passenger compartment heating, battery heating, and electric drive 16 waste heat utilization modes, the first water pump 6 is started and the blower 27 in the passenger compartment HVAC assembly is turned on. Driven by the first water pump 6, the coolant enters the coolant side port No. 1 of the first heat exchanger 2, flows out through the coolant side port No. 2 of the first heat exchanger 2, enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly, and mixes with part of the coolant flowing out through the No. 3 port of the proportional three-way valve 13. The water flows into the inlet of the third water pump 11, flows out through the outlet of the third water pump 11 and enters the coolant side inlet of the battery pack 12, flows out through the coolant side outlet of the battery pack 12 and enters the No. 1 port of the proportional three-way valve 13, and is divided here. Part of the coolant flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2, and part of the coolant flows out from the No. 3 port of the proportional three-way valve 13 and mixes with the coolant flowing out through the first core 7 in the passenger compartment HVAC assembly and enters the inlet of the third water pump 11;

[0049] The second water pump 10 and the fourth water pump 15 are started. Driven by the second water pump 10, the coolant enters the No. 1 port on the coolant side of the second heat exchanger 4, flows out through the No. 2 port on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the No. 1 port of the three-way valve 9, flows out through the No. 3 port of the three-way valve 9 and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0050] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 1 on the refrigerant side of the first heat exchanger 2, flows out through port No. 2 on the refrigerant side of the first heat exchanger 2 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 1 on the refrigerant side of the second heat exchanger 4, flows out through port No. 2 on the refrigerant side of the second heat exchanger 4 and enters port No. 3 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0051] like Figure 4 As shown, as a preferred embodiment of the present invention, in the passenger compartment no, battery heating, electric drive 16 reduced efficiency heating mode, the first water pump 6 is started and the blower 27 in the passenger compartment HVAC assembly is turned off, and the coolant enters the coolant side port No. 1 of the first heat exchanger 2 under the drive of the first water pump 6, flows out through the coolant side port No. 2 of the first heat exchanger 2 and enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly, and mixes with part of the coolant flowing out through the No. 3 port of the proportional three-way valve 13. After the water is combined, it enters the inlet of the third water pump 11, flows out through the outlet of the third water pump 11 and enters the coolant side inlet of the battery pack 12, flows out through the coolant side outlet of the battery pack 12 and enters the No. 1 port of the proportional three-way valve 13, and is divided here. Part of the coolant flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2, and part of the coolant flows out from the No. 3 port of the proportional three-way valve 13 and mixes with the coolant flowing out of the first core 7 in the passenger compartment HVAC assembly and enters the inlet of the third water pump 11;

[0052] Start the second water pump 10 and the fourth water pump 15. Driven by the second water pump 10, the coolant enters the No. 1 port on the coolant side of the second heat exchanger 4, flows out through the No. 2 port on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the No. 1 port of the three-way valve 9, flows out through the No. 3 port of the three-way valve 9 and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0053] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 1 on the refrigerant side of the first heat exchanger 2, flows out through port No. 2 on the refrigerant side of the first heat exchanger 2 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 1 on the refrigerant side of the second heat exchanger 4, flows out through port No. 2 on the refrigerant side of the second heat exchanger 4 and enters port No. 3 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0054] like Figure 5 As shown, as a preferred embodiment of the present invention, in the passenger compartment dehumidification, battery heating, and electric drive 16 waste heat utilization modes, the first water pump 6 is started and the blower 27 in the passenger compartment HVAC assembly is turned on. The coolant enters the coolant side port No. 1 of the first heat exchanger 2 under the drive of the first water pump 6, flows out through the coolant side port No. 2 of the first heat exchanger 2 and enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly, and is combined with part of the coolant flowing out through the No. 3 port of the proportional three-way valve 13. After the liquid is mixed, it enters the inlet of the third water pump 11, flows out through the outlet of the third water pump 11 and enters the coolant side inlet of the battery pack 12, flows out through the coolant side outlet of the battery pack 12 and enters the No. 1 port of the proportional three-way valve 13, and is divided here. Part of the coolant flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2, and part of the coolant flows out from the No. 3 port of the proportional three-way valve 13 and mixes with the coolant flowing out of the first core 7 in the passenger compartment HVAC assembly to the inlet of the third water pump 11;

[0055] The second water pump 10 and the fourth water pump 15 are started. The coolant enters the coolant side port 1 of the second heat exchanger 4 under the drive of the second water pump 10, flows out through the coolant side port 2 of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the port 1 of the three-way valve 9, flows out through the port 2 of the three-way valve 9 and enters the second core 8 in the passenger compartment HVAC assembly, flows out through the second core 8 in the passenger compartment HVAC assembly, and flows out through the second core 8 in the passenger compartment HVAC assembly. The liquid flows out of the body 8 and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0056] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 1 on the refrigerant side of the first heat exchanger 2, flows out through port No. 2 on the refrigerant side of the first heat exchanger 2 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 1 on the refrigerant side of the second heat exchanger 4, flows out through port No. 2 on the refrigerant side of the second heat exchanger 4 and enters port No. 3 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0057] like Figure 6 As shown, as a preferred embodiment of the present invention, in the passenger compartment dehumidification, battery-free, electric drive 16 waste heat utilization mode, the first water pump 6 is started and the blower 27 in the passenger compartment HVAC assembly is turned on, and the coolant enters the coolant side port No. 1 of the first heat exchanger 2 under the drive of the first water pump 6, flows out through the coolant side port No. 2 of the first heat exchanger 2 and enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly and enters the No. 3 port of the proportional three-way valve 13, flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2;

[0058] The second water pump 10 and the fourth water pump 15 are started. Driven by the second water pump 10, the coolant enters the No. 1 port on the coolant side of the second heat exchanger 4, flows out through the No. 2 port on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the No. 1 port of the three-way valve 9, flows out through the No. 2 port of the three-way valve 9 and enters the second core 8 in the passenger compartment HVAC assembly, flows out through the second core 8 in the passenger compartment HVAC assembly and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0059] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 1 on the refrigerant side of the first heat exchanger 2, flows out through port No. 2 on the refrigerant side of the first heat exchanger 2 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 1 on the refrigerant side of the second heat exchanger 4, flows out through port No. 2 on the refrigerant side of the second heat exchanger 4 and enters port No. 3 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0060] like Figure 7 As shown, as a preferred embodiment of the present invention, in the driving defrost mode, the second water pump 10 and the fourth water pump 15 are started, and the coolant enters the inlet of the low-temperature radiator 14 driven by the second water pump 10 and the fourth water pump 15, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant side inlet of the electric drive 16, flows out through the coolant side outlet of the electric drive 16 and enters port No. 4 of the five-way water valve 26, flows out through port No. 2 of the five-way water valve 26 and enters port No. 1 on the coolant side of the second heat exchanger 4, flows out through port No. 2 on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters port No. 1 of the three-way valve 9, flows out through port No. 3 of the three-way valve 9 and enters the inlet of the low-temperature radiator 14.

[0061] like Figure 8As shown, as a preferred embodiment of the present invention, in the passenger compartment no, battery cooling, electric drive 16 heat dissipation mode, the first water pump 6 is started and the blower 27 in the passenger compartment HVAC assembly is turned off. The coolant enters the coolant side port 1 of the first heat exchanger 2 under the drive of the first water pump 6, flows out through the coolant side port 2 of the first heat exchanger 2 and enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly, and is mixed with part of the coolant flowing out through the No. 3 port of the proportional three-way valve 13 and then enters Enter the inlet of the third water pump 11, flow out through the outlet of the third water pump 11 and enter the coolant side inlet of the battery pack 12, flow out through the coolant side outlet of the battery pack 12 and enter the No. 1 port of the proportional three-way valve 13, where it is split, part of the coolant flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2, and part of the coolant flows out from the No. 3 port of the proportional three-way valve 13, and mixes with the coolant flowing out of the first core 7 in the passenger compartment HVAC assembly and then enters the inlet of the third water pump 11;

[0062] Start the second water pump 10 and the fourth water pump 15. Driven by the second water pump 10, the coolant enters the No. 1 port on the coolant side of the second heat exchanger 4, flows out through the No. 2 port on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the No. 1 port of the three-way valve 9, flows out through the No. 3 port of the three-way valve 9 and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0063] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 2 on the refrigerant side of the second heat exchanger 4, flows out through port No. 1 on the refrigerant side of the second heat exchanger 4 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 2 on the refrigerant side of the first heat exchanger 2, flows out through port No. 1 on the refrigerant side of the first heat exchanger 2 and enters port No. 1 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0064] like Fig. 9As shown, as a preferred embodiment of the present invention, in the passenger compartment cooling, battery cooling, and electric drive 16 heat dissipation modes, the first water pump 6 is started and the blower 27 in the passenger compartment HVAC assembly is turned on. The coolant enters the coolant side port No. 1 of the first heat exchanger 2 under the drive of the first water pump 6, flows out through the coolant side port No. 2 of the first heat exchanger 2 and enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly, and is mixed with part of the coolant flowing out through the No. 3 port of the proportional three-way valve 13. Enter the inlet of the third water pump 11, flow out through the outlet of the third water pump 11 and enter the coolant side inlet of the battery pack 12, flow out through the coolant side outlet of the battery pack 12 and enter the No. 1 port of the proportional three-way valve 13, where it is split, part of the coolant flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2, and part of the coolant flows out from the No. 3 port of the proportional three-way valve 13, and mixes with the coolant flowing out of the first core 7 in the passenger compartment HVAC assembly and then enters the inlet of the third water pump 11;

[0065] Start the second water pump 10 and the fourth water pump 15. Driven by the second water pump 10, the coolant enters the No. 1 port on the coolant side of the second heat exchanger 4, flows out through the No. 2 port on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the No. 1 port of the three-way valve 9, flows out through the No. 3 port of the three-way valve 9 and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0066] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 2 on the refrigerant side of the second heat exchanger 4, flows out through port No. 1 on the refrigerant side of the second heat exchanger 4 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 2 on the refrigerant side of the first heat exchanger 2, flows out through port No. 1 on the refrigerant side of the first heat exchanger 2 and enters port No. 1 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0067] like Fig.10As shown, as a preferred embodiment of the present invention, in the passenger compartment cooling, battery-free, electric drive 16 heat dissipation mode, the first water pump 6 is started and the blower 27 in the passenger compartment HVAC assembly is turned on, and the coolant enters the coolant side port No. 1 of the first heat exchanger 2 under the drive of the first water pump 6, flows out through the coolant side port No. 2 of the first heat exchanger 2 and enters the inlet of the first water pump 6, flows out through the outlet of the first water pump 6 and enters the first core 7 in the passenger compartment HVAC assembly, flows out through the first core 7 in the passenger compartment HVAC assembly and enters the No. 3 port of the proportional three-way valve 13, flows out through the No. 2 port of the proportional three-way valve 13 and enters the No. 5 port of the five-way water valve 26, flows out through the No. 1 port of the five-way water valve 26 and enters the No. 1 port of the coolant side of the first heat exchanger 2;

[0068] Start the second water pump 10 and the fourth water pump 15. Driven by the second water pump 10, the coolant enters the No. 1 port on the coolant side of the second heat exchanger 4, flows out through the No. 2 port on the coolant side of the second heat exchanger 4 and enters the inlet of the second water pump 10, flows out through the outlet of the second water pump 10 and enters the No. 1 port of the three-way valve 9, flows out through the No. 3 port of the three-way valve 9 and enters the inlet of the low-temperature radiator 14, flows out through the outlet of the low-temperature radiator 14 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant inlet of the electric drive 16, flows out through the coolant outlet of the electric drive 16 and enters the No. 4 port of the five-way water valve 26, flows out through the No. 4 port of the five-way water valve 26 and enters the No. 2 port of the five-way water valve 26, flows out through the No. 2 port of the five-way water valve 26 and enters the No. 1 port on the coolant side of the second heat exchanger 4;

[0069] Start the compressor 5. Driven by the compressor 5, the refrigerant enters port No. 2 of the refrigerant four-way valve 1, flows out through port No. 3 of the refrigerant four-way valve 1 and enters port No. 2 on the refrigerant side of the second heat exchanger 4, flows out through port No. 1 on the refrigerant side of the second heat exchanger 4 and enters one end of the two-way electronic expansion valve 3, flows out through the other end of the two-way electronic expansion valve 3 and enters port No. 2 on the refrigerant side of the first heat exchanger 2, flows out through port No. 1 on the refrigerant side of the first heat exchanger 2 and enters port No. 1 of the refrigerant four-way valve 1, flows out through port No. 1 of the refrigerant four-way valve 1 and enters port No. 4 of the refrigerant four-way valve 1, flows out through port No. 4 of the refrigerant four-way valve 1 and enters the inlet of the gas-liquid separator 30, flows out through the outlet of the gas-liquid separator 30 and enters the inlet of the compressor 5.

[0070] like Fig.11 As shown, as a preferred embodiment of the present invention, in the heat storage mode of the electric drive 16, the fourth water pump 15 is started, and the coolant enters the coolant side inlet of the electric drive 16 under the drive of the fourth water pump 15, flows out through the coolant side outlet of the electric drive 16 and enters port No. 4 of the five-way water valve 26, flows out through port No. 3 of the five-way water valve 26 and enters the inlet of the fourth water pump 15, flows out through the outlet of the fourth water pump 15 and enters the coolant side inlet of the electric drive 16.

[0071] like Fig.12 As shown, as a preferred embodiment of the present invention, in the battery temperature equalization mode, the third water pump 11 is started, and the coolant enters the coolant side inlet of the battery pack 12 driven by the third water pump 11, flows out through the coolant side outlet of the battery pack 12 and enters port No. 1 of the five-way water valve 26, flows out through port No. 3 of the five-way water valve 26 and enters the inlet of the third water pump 11.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric vehicle thermal management system based on a dual multi-way valve, characterized in that: Including refrigerant management module, passenger compartment thermal management module, battery pack thermal management module, electric drive thermal management module and low-temperature radiator module; The refrigerant management module includes a compressor, a refrigerant four-way valve, a first heat exchanger, a two-way electronic expansion valve, a second heat exchanger and a gas-liquid separator, wherein the first heat exchanger and the second heat exchanger both have a refrigerant side and a coolant side, the outlet end of the compressor is connected to port No. 2 of the refrigerant four-way valve, port No. 1 of the refrigerant four-way valve is connected to port No. 2 of the refrigerant side of the first heat exchanger, port No. 1 of the refrigerant side of the first heat exchanger is connected to one end of the two-way electronic expansion valve, the other end of the two-way electronic expansion valve is connected to port No. 1 of the refrigerant side of the second heat exchanger, port No. 2 of the refrigerant side of the second heat exchanger is connected to port No. 3 of the refrigerant four-way valve, port No. 4 of the refrigerant four-way valve is connected to the inlet of the gas-liquid separator, and the outlet of the gas-liquid separator is connected to the inlet of the compressor; The passenger compartment thermal management module includes a five-way water valve, a coolant side of a first heat exchanger, a first water pump, a blower in a passenger compartment HVAC assembly, a first core in the passenger compartment HVAC assembly, a second core in the passenger compartment HVAC assembly, and a proportional three-way valve, wherein port No. 1 of the five-way water valve is connected to port No. 1 of the coolant side of the first heat exchanger, port No. 2 of the coolant side of the first heat exchanger is connected to the inlet of the first water pump, the outlet of the first water pump is connected to the first core in the passenger compartment HVAC assembly, the outlet of the first core in the passenger compartment HVAC assembly is connected to port No. 3 of the proportional three-way valve, and port No. 2 of the proportional three-way valve is connected to port No. 5 of the five-way water valve; the blower in the passenger compartment HVAC assembly is arranged in front of the first core in the passenger compartment HVAC assembly; the second core in the passenger compartment HVAC assembly is arranged behind the first core in the passenger compartment HVAC assembly; The battery pack thermal management module includes a third water pump and a battery pack, wherein the inlet of the third water pump is connected to port No. 3 of the proportional three-way valve, the outlet of the third water pump is connected to the coolant inlet of the battery pack, and the coolant outlet of the battery pack is connected to port No. 1 of the proportional three-way valve; The electric drive thermal management module includes a fourth water pump and an electric drive, wherein the inlet of the fourth water pump is connected to port No. 3 of the five-way water valve, the outlet of the fourth water pump is connected to the coolant inlet of the electric drive, and the coolant outlet of the electric drive is connected to port No. 4 of the five-way water valve; The low-temperature radiator module includes a low-temperature radiator, a second water pump, a coolant side of a second heat exchanger and a three-way valve, wherein port No. 1 of the coolant side of the second heat exchanger is connected to port No. 2 of the five-way water valve, port No. 2 of the coolant side of the second heat exchanger is connected to the inlet of the second water pump, the outlet of the second water pump is connected to port No. 1 of the three-way valve, port No. 3 of the three-way valve is connected to the inlet of the low-temperature radiator, and the outlet of the low-temperature radiator is connected to port No. 3 of the five-way water valve.

2. The electric vehicle thermal management system based on a dual multi-way valve according to claim 1 is characterized in that: A first temperature and pressure sensor is provided on the pipeline connecting the outlet of the compressor and the refrigerant four-way valve, and a second temperature and pressure sensor is provided on the pipeline connecting the inlet of the compressor and the refrigerant four-way valve. The second temperature and pressure sensor is placed between the gas-liquid separator and the compressor.

3. The electric vehicle thermal management system based on a dual multi-way valve according to claim 2 is characterized in that: A first temperature sensor is provided at the air outlet of the first core in the passenger compartment HVAC assembly, a second temperature sensor is provided at the air outlet of the second core in the passenger compartment HVAC assembly, a third temperature sensor is provided at the coolant inlet of the battery pack, and the third temperature sensor is provided on the pipeline connecting the coolant outlet of the battery pack and the inlet of the third water pump, a fourth temperature sensor is provided at the coolant outlet of the battery pack, and the fourth temperature sensor is provided on the pipeline between the battery pack and port No. 1 of the proportional three-way valve, a fifth temperature sensor is provided at the coolant outlet of the electric drive, and the fifth temperature sensor is provided on the pipeline between the electric drive and port No. 4 of the five-way water valve, a sixth temperature sensor is provided at the coolant side outlet of the second heat exchanger, and the sixth temperature sensor is provided on the pipeline between the coolant side outlet of the second heat exchanger and the inlet of the second water pump, a seventh temperature sensor is provided at the coolant side outlet of the first heat exchanger, and the seventh temperature sensor is provided on the pipeline between the coolant side outlet of the first heat exchanger and the inlet of the first water pump.

4. The electric vehicle thermal management system based on a dual multi-way valve according to claim 1, characterized in that: The first heat exchanger and the second heat exchanger are both plate heat exchangers.

5. The electric vehicle thermal management system based on a dual multi-way valve according to claim 1, characterized in that: It also includes a first water kettle and a second water kettle, the inlet of the first water kettle is connected to the inlet of the fourth water pump, the outlet of the first water kettle is connected to the outlet of the electric drive coolant, the inlet of the second water kettle is connected to the inlet of the third water pump, and the outlet of the second water kettle is connected to the outlet of the battery pack coolant.

6. The electric vehicle thermal management system based on a dual multi-way valve according to claim 1, characterized in that: An active air intake grille is installed at the low-temperature radiator.

Images