Thermal management system for new energy vehicles and vehicle

Abstract

The present application discloses a thermal management system and vehicle for a new energy vehicle, wherein the thermal management system of the new energy vehicle includes an air conditioning heat pump unit, and the air conditioning heat pump unit has a refrigeration circuit, the refrigeration circuit includes a refrigeration refrigerant side flow path and a refrigeration water side flow path that flow in conjunction with each other, and both flow paths include a first heat exchange element; the first heat exchange element includes a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected to the refrigeration refrigerant side flow path, and the second heat exchange channel is connected to the refrigeration water side flow path; the media in the refrigeration refrigerant side flow path and the refrigeration water side flow path are mixed through the first heat exchange element to form a first medium; the temperature of the first medium can be adjusted by the ratio of the media in the refrigeration side flow path to the water side flow path. The present application achieves temperature regulation in multiple temperature zones by forming cold air and warm air through the first heat exchange element by cooperating with the flow of the refrigeration refrigerant side flow path and the refrigeration water side flow path, which not only reduces system energy consumption during the heat exchange process but also improves heat exchange efficiency.

Description

Technical Field

[0001] The present disclosure generally relates to the field of automotive thermal management systems, and more particularly to a thermal management system and a vehicle for new energy vehicles. Background Art

[0002] As the core key technology of automotive thermal management, the quality of heat pump architecture design is directly related to the vehicle's energy consumption, market competitiveness, user reputation, vehicle sales and platform expansion capabilities. The current heat pump architecture is divided into direct heat pump and indirect heat pump according to the heating method.

[0003] Among them, the direct heat pump system components of the Heating, Ventilation and Air Conditioning (HVAC) assembly have a complex structure, large size, and high space layout requirements. They do not have platform expansion and cost advantages, so they are more inclined to the indirect heat pump architecture. The existing heat pump models on the market are either air source heat pumps or water source heat pumps according to the heat absorption method. However, air source heat pumps and water source heat pumps have the problems of high energy consumption and low heat exchange efficiency in the multi-temperature zone requirements of air conditioning. Therefore, the field of vehicle thermal management systems still needs innovative designs. To this end, we propose a thermal management system for new energy vehicles. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a thermal management system and a vehicle for new energy vehicles with high heat exchange efficiency and low energy consumption.

[0005] In a first aspect, the present application provides a thermal management system for a new energy vehicle, comprising:

[0006] An air conditioning heat pump unit, the air conditioning heat pump unit having a refrigeration circuit, the refrigeration circuit including a refrigeration refrigerant side flow path and a refrigeration water side flow path for coordinated flow, the refrigeration refrigerant side flow path and the refrigeration water side flow path both including a first heat exchange element;

[0007] The first heat exchange element includes a first heat exchange channel and a second heat exchange channel; the first heat exchange channel is connected to the refrigerant side flow path, and the second heat exchange channel is connected to the cooling water side flow path, so that the medium in the refrigerant side flow path and the medium in the cooling water side flow path are mixed through the first heat exchange element to form a first medium;

[0008] The temperature of the first medium can be adjusted by adjusting the ratio of the medium in the refrigerant-side flow path to the medium in the water-side flow path.

[0009] According to the technical solution provided in the embodiment of the present application, the refrigerant side flow path includes a compressor, a second heat exchange element, a third heat exchange element, a fourth heat exchange element and a first heat exchange element which are sequentially connected to form a circulation flow path;

[0010] The second heat exchange element includes a third heat exchange channel and a fourth heat exchange channel; the fourth heat exchange element includes a fifth heat exchange channel and a sixth heat exchange channel; the fifth heat exchange channel, the first heat exchange channel and the sixth heat exchange channel are sequentially connected through pipelines;

[0011] Among them, the output end of the compressor is connected to the fourth heat exchange channel, and its input end is connected to the sixth heat exchange channel; one end of the third heat exchange element is connected to the fourth heat exchange channel through a pipeline, and the other end of the third heat exchange element is connected to the fifth heat exchange channel through a pipeline.

[0012] According to the technical solution provided in the embodiment of the present application, the cooling water side flow path includes a circulation loop formed by sequentially connecting the second heat exchange element in the cooling refrigerant side flow path and the PTC heater, the first water pump, the three-way valve and the first heat exchange element;

[0013] In which, the input end of the PTC heater is connected to the third heat exchange channel, and its output end is connected to the input end of the first water pump; the three-way valve includes an inlet, a first outlet and a second outlet; the inlet is connected to the output end of the first water pump; the first outlet is connected to the second heat exchange channel, and the third heat exchange channel is connected to the second heat exchange channel through a pipeline.

[0014] According to the technical solution provided in the embodiment of the present application, the refrigeration refrigerant side flow path also includes:

[0015] a first valve, the first valve being arranged on the pipeline between the third heat exchange element and the fourth heat exchange channel;

[0016] a drying bottle, the drying bottle being disposed between the third heat exchange element and the fourth heat exchange element; the inlet of the drying bottle being connected to the third heat exchange element via a pipeline, and the outlet of the drying bottle being connected to the fifth heat exchange channel via a pipeline;

[0017] a second valve, the second valve being arranged on a pipeline connecting the third heat exchange element and the drying bottle;

[0018] A third valve is provided on a pipeline connecting the fifth heat exchange channel and the first heat exchange channel.

[0019] According to the technical solution provided in the embodiment of the present application, the air conditioning heat pump unit further has a heating circuit, and the heating circuit includes a heating refrigerant side flow path and a heating water side flow path that cooperate with each other;

[0020] The heating refrigerant side flow path includes a circulation loop formed by sequentially connecting the compressor, the second heat exchange element, the drying bottle, the fourth heat exchange element and the third heat exchange element in the cooling refrigerant side flow path;

[0021] The pipeline connecting the third heat exchange element and the fourth heat exchange channel includes a first branch pipeline and a second branch pipeline spaced apart with the first valve as a dividing point; the first branch pipeline is located on a side of the first valve close to the second heat exchange element; the first branch pipeline is connected to the pipeline connecting the third heat exchange element and the drying bottle, and the connecting port between the first branch pipeline and the pipeline is located between the second valve and the drying bottle; the second branch pipeline is connected to the sixth heat exchange channel;

[0022] The pipeline connecting the fifth heat exchange channel and the first heat exchange channel has a third branch pipeline and a fourth branch pipeline; the fifth heat exchange channel is connected to the connecting pipeline of the third heat exchange element and the drying bottle through the third branch pipeline, and the connecting port of the third branch pipeline and the connecting pipeline of the third heat exchange element and the drying bottle is located on the side of the second valve away from the drying bottle.

[0023] According to the technical solution provided in the embodiment of the present application, it also includes: a battery thermal management unit, the battery thermal management unit having a battery refrigeration circuit, the battery refrigeration circuit including a battery refrigeration refrigerant side flow path and a battery refrigeration water side flow path;

[0024] The battery cooling refrigerant side flow path includes a circulation loop formed by sequentially connecting a fourth valve and a fifth heat exchange element in parallel on both sides of the first heat exchange element in the cooling refrigerant side flow path;

[0025] Among them, the fifth heat exchange element includes a seventh heat exchange channel and an eighth heat exchange channel; one end of the fifth heat exchange channel is connected to the seventh heat exchange channel through a fourth branch pipeline, and the other end is connected to the sixth heat exchange channel through a pipeline; the fourth valve is arranged on the fourth branch pipeline.

[0026] According to the technical solution provided in the embodiment of the present application, the battery cooling water side flow path includes the fifth heat exchange element, the second water pump and the battery connected in sequence to form a circulation flow path;

[0027] One end of the eighth heat exchange channel is connected to the input end of the second water pump through a pipeline, and the other end is connected to the output end of the battery through a pipeline; the output end of the second water pump is connected to the input end of the battery.

[0028] According to the technical solution provided in the embodiment of the present application, the battery cooling water side flow path further includes a first reversing valve, a second reversing valve, and a third reversing valve; each reversing valve has a first reversing inlet and a second reversing inlet, and each reversing inlet corresponds to a first flow channel and a second flow channel;

[0029] The first flow channel corresponding to the first reversing inlet of the first reversing valve is connected to the pipeline connecting the eighth heat exchange channel and the input end of the second water pump;

[0030] The first flow channel corresponding to the first reversing inlet of the second reversing valve, the first flow channel corresponding to the second reversing inlet of the first reversing valve, and the first flow channel corresponding to the first reversing inlet of the third reversing valve are sequentially connected to the connecting pipeline between the eighth heat exchange channel and the battery output end.

[0031] According to the technical solution provided in the embodiment of the present application, the battery thermal management unit further has a battery heating circuit, which includes a battery heating refrigerant side flow path and a battery heating water side flow path;

[0032] The battery heating water side flow path includes a circulation loop formed by connecting a sixth heat exchange element in parallel on both sides of the first heat exchange element in the cooling water side flow path; the sixth heat exchange element includes a ninth heat exchange channel and a tenth heat exchange channel;

[0033] One end of the tenth heat exchange channel is connected to the second outlet, and the other end is connected to the connecting pipeline of the second heat exchange channel and the third heat exchange channel through a pipeline, so that the medium in the tenth heat exchange channel flows into the third heat exchange channel.

[0034] According to the technical solution provided in the embodiment of the present application, an auxiliary thermal management unit is also included, and the auxiliary thermal management unit includes a dehumidification circuit; the dehumidification circuit includes a heating and dehumidification refrigerant side flow path and a heating and dehumidification water side flow path and a cooling and dehumidification refrigerant side flow path of the matching flow channel;

[0035] Wherein, the heating and dehumidification refrigerant side flow path also includes a first sub-flow path and a second sub-flow path for coordinated flow;

[0036] The first sub-flow path includes a circulation loop formed by sequentially connecting the compressor, the second heat exchange element, the drying bottle, the fourth heat exchange element and the first heat exchange element in the refrigerant side flow path.

[0037] According to the technical solution provided in the embodiment of the present application, the auxiliary thermal management unit further includes a defrost circuit; the defrost circuit includes a PTC heater defrost refrigerant side flow path and a PTC heater defrost water side flow path and a heating defrost refrigerant side flow path;

[0038] The PTC heater defrost water side flow path includes the fifth heat exchange element in the battery cooling water side flow path and the first radiator, the fourth reversing valve, the power supply device and the third water pump, which are connected in sequence to form a circulation loop;

[0039] The eighth heat exchange channel is connected to the input end of the first radiator through the first reversing valve; the output end of the third water pump is connected to the eighth heat exchange channel through the flow channels of the fourth reversing valve and the third reversing valve.

[0040] According to the technical solution provided in the embodiment of the present application, the auxiliary thermal management unit further includes a power supply device temperature equalizing circuit and a battery temperature equalizing circuit; the power supply device temperature equalizing circuit and the battery temperature equalizing circuit respectively include a power supply device water side flow path and a battery water side flow path;

[0041] The water side flow path of the power supply device includes a circulation loop formed by sequentially connecting the fourth reversing valve, the power supply device and the third water pump in the defrost water side flow path of the PTC heater.

[0042] The battery water side flow path includes a circulation loop formed by sequentially connecting a battery, a first reversing valve, a second reversing valve, and a second water pump in the battery cooling water side flow path.

[0043] According to the technical solution provided in the embodiment of the present application, it also includes a power supply device heat drive flow path, and the power supply device heat drive flow path includes the power supply device, the third water pump, the fourth reversing valve, the third reversing valve and the first radiator in the defrost water side flow path of the PTC heater, which are connected in sequence to form a circulation loop.

[0044] According to the technical solution provided in the embodiment of the present application, the thermal management system further includes a plurality of pressure sensors and temperature sensors for collecting the temperature and pressure of each circuit.

[0045] In a second aspect, the present application provides a vehicle that is equipped with the above-mentioned thermal management system for new energy vehicles.

[0046] In summary, the present technical solution specifically discloses a thermal management system and a vehicle of a new energy vehicle, wherein the thermal management system of the new energy vehicle includes an air-conditioning heat pump unit for cooling and heating; specifically, the air-conditioning heat pump unit has a refrigeration circuit, the refrigeration circuit includes a refrigeration refrigerant side flow path and a refrigeration water side flow path that flow in conjunction with each other, and the refrigeration refrigerant side flow path and the refrigeration water side flow path both include a first heat exchanger; the first heat exchanger includes a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected to the refrigerant flow path, at this time the medium passing through the first heat exchange channel will be converted into cold air in the popular sense; the second heat exchange channel is connected to the water side flow path, at this time the medium passing through the second heat exchange channel will be converted into hot air in the popular sense; then the cold air and hot air are mixed through the hot and cold air doors of the first heat exchanger to form a first medium, and then the temperature of the first medium can be adjusted by the above-mentioned ratio of cold air to hot air, and air-conditioned air with a suitable temperature can be output according to people's needs.

[0047] The present application achieves efficient heat exchange and air conditioning by coordinating the flowing refrigeration refrigerant side flow path, the cooling water side flow path and the first heat exchange element. At the same time, the refrigeration refrigerant side flow path in the thermal management system provided by the present application does not use PTC to provide a heat source, which can further reduce energy consumption and thereby increase the vehicle's cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0049] Figure 1 This is a schematic diagram of the thermal management system of a new energy vehicle.

[0050] Numbers in the figure: 1, first heat exchange element; 11, first heat exchange channel; 12, second heat exchange channel; 2, compressor; 3, second heat exchange element; 31, third heat exchange channel; 32, fourth heat exchange channel; 4, third heat exchange element; 5, fourth heat exchange element; 51, fifth heat exchange channel; 52, sixth heat exchange channel; 6, PTC heater; 7, first water pump; 8, three-way valve; 9, first valve; 10, drying bottle; 13, second valve; 14, Third valve; 15. Fourth valve; 16. Fifth heat exchange element; 161. Seventh heat exchange channel; 162. Eighth heat exchange channel; 17. Second water pump; 18. Battery; 19. First reversing valve; 20. Second reversing valve; 21. Third reversing valve; 22. Sixth heat exchange element; 221. Ninth heat exchange channel; 222. Tenth heat exchange channel; 23. First radiator; 24. Fourth reversing valve; 25. Power supply unit; 26. Third water pump. DETAILED DESCRIPTION

[0051] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0052] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] Example 1

[0054] Please refer to Figure 1 The schematic diagram of the first embodiment of a thermal management system for a new energy vehicle provided by the present application includes:

[0055] An air conditioning heat pump unit, the air conditioning heat pump unit has a refrigeration circuit, the refrigeration circuit can be used to cool the environment (air conditioning refrigeration), the refrigeration circuit includes a refrigeration refrigerant side flow path and a refrigeration water side flow path that flow together, and the refrigeration refrigerant side flow path and the refrigeration water side flow path both include a first heat exchanger 1; preferably, the type of the first heat exchanger 1 is an HVAC assembly, and the HVAC assembly shell contains a heater core, an evaporator core, and hot and cold air doors for mixing cold air and warm air, wherein the evaporator core can utilize the characteristic of liquid low-temperature refrigerant that is easy to evaporate under low pressure to convert the liquid low-temperature refrigerant into vapor and absorb the heat of the cooled medium to achieve the purpose of refrigeration.

[0056] Furthermore, the first heat exchange element 1 includes a first heat exchange channel 11 and a second heat exchange channel 12; the first heat exchange channel 11 is connected to the refrigerant side flow path, and the second heat exchange channel 12 is connected to the cooling water side flow path, so that the medium in the refrigerant side flow path and the medium in the cooling water side flow path are mixed through the first heat exchange element 1 to form a first medium;

[0057] The temperature of the first medium can be adjusted by adjusting the ratio of the medium in the cooling medium side flow path to the medium in the cooling water side flow path.

[0058] like Figure 1 As shown, corresponding to the preferred type of the first heat exchange element 1, the evaporator core forms the first heat exchange channel 11, and the warm air core forms the second heat exchange channel 12; the medium in the refrigerant side flow path enters the evaporator core and exchanges heat with the air side to form low-temperature gas, which can be understood as cold air in the popular sense; and the medium in the cooling water side flow path enters the warm air core and exchanges heat with the air side, thereby heating the outside air to form high-temperature gas, which can be understood as warm air in the popular sense; then the above-mentioned cold air and warm air are adjusted proportionally by the first heat exchange element 1 through the cold and warm air doors according to the proportional instruction information of the control end, so that the temperature of the mixed first medium meets the needs of the driver or passengers.

[0059] like Figure 1 As shown, the refrigerant side flow path includes a compressor 2, a second heat exchanger 3, a third heat exchanger 4, a fourth heat exchanger 5 and a first heat exchanger 1, which are sequentially connected to form a circulation flow path; optionally, the second heat exchanger 3 is a water-cooled condenser, and the fourth heat exchanger 5 is a plate heat exchanger; preferably, the third heat exchanger 4 is a non-subcooled air-cooled condenser, and the non-subcooled condenser is used for heat exchange in the cooling condition, while the heat is absorbed from the non-subcooled condenser through the air side in the heating condition;

[0060] The second heat exchange element 3 includes a third heat exchange channel 31 and a fourth heat exchange channel 32; the fourth heat exchange element 5 includes a fifth heat exchange channel 51 and a sixth heat exchange channel 52; the fifth heat exchange channel 51, the first heat exchange channel 11 and the sixth heat exchange channel 52 are sequentially connected through pipelines;

[0061] like Figure 1 As shown, corresponding to the optional or preferred types of the second heat exchange element 3 and the fourth heat exchange element 5, the water side channel of the second heat exchange element 3 is the third heat exchange channel 31, and the refrigerant side channel of the second heat exchange element 3 is the fourth heat exchange channel 32; the hot side channel of the fourth heat exchange element 5 is the fifth heat exchange channel 51, and the cold side channel of the fourth heat exchange element 5 is the sixth heat exchange channel 52; wherein, the third heat exchange element 4 can directly exchange heat with the outside air without the need for secondary heat exchange, which greatly improves the heat exchange efficiency; it should be noted that the secondary heat exchange mentioned here refers to the heat exchange with the air again after the heat exchange with the water side by means of the refrigerant;

[0062] The specific connection form and working principle of the above-mentioned refrigeration refrigerant side flow path are as follows:

[0063] (1) Connection form of each component in the refrigerant side flow path: the output end of the compressor 2 is connected to the fourth heat exchange channel 32, and its input end is connected to the sixth heat exchange channel 52; one end of the third heat exchange element 4 is connected to the fourth heat exchange channel 32 through a pipeline, and the other end thereof is connected to the fifth heat exchange channel 51 through a pipeline; since a circulation loop is formed, the fifth heat exchange channel 51 is connected to the first heat exchange channel 11 through a pipeline. After the other end of the first heat exchange channel 11 is connected to the sixth heat exchange channel 52, the medium in the first heat exchange channel 11 of the first heat exchange element 1 will flow back to the compressor 2 through the sixth heat exchange channel 52 to complete the cycle;

[0064] (2) Working principle of the refrigeration refrigerant side flow path: the compressor 2 compresses the refrigerant into a high-temperature and high-pressure gaseous refrigerant, which enters the second heat exchange element 3 to exchange heat with the circulating liquid, and the high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant; enters the third heat exchange element 4 to exchange heat with the outside air, at which time the medium-temperature and high-pressure liquid refrigerant is further condensed into a medium-temperature and high-pressure liquid refrigerant; enters the fourth heat exchange element 5 to exchange heat with the cold side medium, at which time the medium-temperature and high-pressure liquid refrigerant is further condensed to form a low-temperature and high-pressure liquid refrigerant; finally, the low-temperature and high-pressure liquid refrigerant will cool the air passing through the evaporator core to form cold air; it should be noted that since the thermal management system provided in this application has multiple heat exchange elements, the states of the above-mentioned media are all relative to other states, that is, the states of the media are relative; for example, the above-mentioned "high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant", the temperature of the liquid refrigerant here is only lower than the temperature of the gaseous refrigerant generated by the compressor 2.

[0065] In addition, the low-temperature, low-pressure gaseous refrigerant flowing out through the first heat exchange channel 11 will pass through the sixth heat exchange channel 52 to exchange heat with the hot side medium of the fourth heat exchange element 5, and then return to the compressor 2 to complete the cycle. In this process, the fourth heat exchange element 5 is used to first exchange heat with the low-temperature, low-pressure gaseous refrigerant so that it has a higher temperature before entering the compressor 2. This not only improves the heat exchange efficiency of the entire thermal management system, but also provides certain protection for the compressor 2 and extends its service life. Since the entire refrigeration refrigerant side flow path is a circulation loop, they serve as heat exchange media with each other during the circulation process. For example, in the fourth heat exchange element 5, the medium-temperature and high-pressure liquid refrigerant flowing through the fifth heat exchange channel 51 will serve as the hot side medium of the low-temperature, low-pressure gaseous refrigerant flowing from the second heat exchange channel 12 into the sixth heat exchange channel 52.

[0066] In summary, since traditional thermal management systems use positive temperature coefficient (PTC) heaters to provide heat sources for multiple temperature zones (air conditioning temperature can be adjusted), the refrigeration refrigerant side flow path in this application uses compressor 2 to provide a heat source, which is then exchanged with the second heat exchange element 3, and then transmitted to the HVAC assembly through a water path. The HVAC assembly completes the multi-temperature zone temperature control function without starting the PTC. Compared with turning on the PTC heater 6 to provide a heat source, the overall energy consumption of the thermal management system can be effectively reduced.

[0067] like Figure 1 As shown, the cooling water side flow path includes a circulation loop formed by the second heat exchange element 3 in the cooling refrigerant side flow path and the PTC heater 6, the first water pump 7, the three-way valve 8 and the first heat exchange element 1, which are connected in sequence; preferably, the PTC heater 6 is a high-pressure water heater, that is, a WPTC; the three-way valve 8 is a proportional three-way valve;

[0068] The specific connection method of the above-mentioned cooling water side flow path is: the input end of the PTC heater 6 is connected to the third heat exchange channel 31, and its output end is connected to the input end of the first water pump 7; the three-way valve 8 includes an inlet a, a first outlet b and a second outlet c; the inlet a is connected to the output end of the first water pump 7; the first outlet b is connected to the second heat exchange channel 12 (warm air core), and the third heat exchange channel 31 is connected to the second heat exchange channel 12 through a pipeline.

[0069] The working principle of the above-mentioned cooling water side flow path is: the input end of the PTC heater 6 heats the circulating liquid in the second heat exchange element 3, which is then pumped to the heater core by the first water pump 7 for heat exchange with the air side. The outside air flowing into the heater core is heated to form warm air, and then the circulating liquid returns to the third channel of the second heat exchange element 3 through the water outlet of the heater core, forming a circulation loop.

[0070] like Figure 1As shown, specifically, the refrigeration refrigerant side flow path also includes:

[0071] The first valve 9 is arranged on the pipeline between the third heat exchange element 4 and the fourth heat exchange channel 32; optionally, the first valve 9 is a refrigerant stop valve SOV, so that the medium in the fourth heat exchange channel 32 can selectively flow into the third heat exchange element 4 for heat exchange.

[0072] The drying bottle 10 is arranged between the third heat exchange element 4 and the fourth heat exchange element 5; the inlet of the drying bottle 10 is connected to the third heat exchange element 4 through a pipeline, and the outlet of the drying bottle 10 is connected to the fifth heat exchange channel 51 through a pipeline; the drying bottle 10 is used to dry and filter the high-temperature and high-pressure cold gas formed by the heat exchange of the third heat exchange element 4, thereby reducing water vapor and better performing the next step of heat exchange.

[0073] In addition, the drying bottle 10 has the following functions: (1) It is used to store and supply liquid refrigerant in the refrigeration system so that the profit and loss of liquid refrigerant can be compensated and adjusted when the working conditions change. Generally speaking, the load of the air conditioning system is large when it starts working, and the refrigerant circulation volume is also large. After working for a period of time, the load will be reduced, and the required refrigerant volume will be reduced accordingly. (2) All components in the refrigeration system should be strictly cleaned and dried before leaving the factory. However, when installing the pipeline, it is possible that dirt is not brought in by carelessness. The pipeline may also produce dirt, such as beryllium oxide. The refrigerant itself is not very clean, and powder and grinding chips are produced when the compressor is running. These mechanical impurities and dirt can be filtered out by the drying bottle. (3) It is used to absorb moisture in Freon. Moisture comes from the refrigeration system not being strictly dried, or air entering, or water dissolved in the refrigerant.

[0074] The second valve 13 is provided on the pipeline connecting the third heat exchange element 4 and the drying bottle 10; optionally, the second valve 13 is a one-way valve for preventing backflow of the medium.

[0075] The third valve 14 is arranged on the pipeline connecting the fifth heat exchange channel 51 and the first heat exchange channel 11; preferably, the third valve is an electronic expansion valve EXV, which is used to reduce the pressure, throttle and adjust the flow of the gas in the pipeline. The valve is specifically used to reduce the pressure, throttle and adjust the flow of the low-temperature and high-pressure liquid refrigerant formed by the heat exchange between the fourth heat exchange element 5 and the cold side medium, so that the medium flowing into the evaporator core is a low-temperature and low-pressure liquid refrigerant, ensuring that the evaporator core will not be subjected to high-pressure shock.

[0076] like Figure 1As shown, the air conditioning heat pump unit also has a heating circuit, which is used to heat the environment (air conditioning heating). The heating circuit includes a heating refrigerant side flow path and a heating water side flow path that cooperate with each other. In this state, the thermal management system does not need to supply a cold source, and only needs to adjust the hot air load when the temperature needs to be adjusted.

[0077] The heating refrigerant side flow path includes a circulation loop formed by sequentially connecting the compressor 2, the second heat exchange element 3, the drying bottle 10, the fourth heat exchange element 5 and the third heat exchange element 4 in the cooling refrigerant side flow path;

[0078] Specifically, the connection mode of the heating and cooling medium side flow path is as follows: the pipeline connecting the third heat exchange element 4 and the fourth heat exchange channel 32 has a first branch pipeline and a second branch pipeline spaced apart with the first valve 9 as the dividing point, and as Figure 1 As shown, the first branch pipeline and the second branch pipeline are also provided with a refrigerant shut-off valve SOV. The refrigerant shut-off valves SOV work in conjunction with each other to allow the medium in each heat exchange channel to selectively flow to a designated flow path. The first branch pipeline is located on the side of the first valve 9 close to the second heat exchange element 3. The first branch pipeline is connected to the pipeline connecting the third heat exchange element 4 and the drying bottle 10, and the connecting port between the two is located between the second valve 13 and the drying bottle 10. The second branch pipeline is connected to the sixth heat exchange channel 52.

[0079] The pipeline connecting the fifth heat exchange channel 51 and the first heat exchange channel 11 has a third branch pipeline and a fourth branch pipeline; the fifth heat exchange channel 51 is connected to the connecting pipeline of the third heat exchange element 4 and the drying bottle 10 through the third branch pipeline, and the connecting port of the third branch pipeline and the connecting pipeline of the third heat exchange element 4 and the drying bottle 10 is located on the side of the second valve 13 away from the drying bottle 10, and an electronic expansion valve EXV is correspondingly provided on the third branch pipeline.

[0080] To sum up, the principle of the heating refrigerant side flow path is: the medium-temperature and high-pressure liquid refrigerant formed in the second heat exchanger 3 enters the drying bottle 10 through the first branch pipeline for storage and filtration of the liquid refrigerant to ensure the operation of the system, and then enters the fifth heat exchange channel 51 of the fourth heat exchanger 5 to exchange heat with its cold side, and then enters the third heat exchanger 4 through the third branch pipeline and then returns to the sixth heat exchange channel 52 through the second branch pipeline to complete the cycle; at this time, the heating circuit mainly relies on the heating water side flow path to meet the heating demand to provide a heat source. Here, the heating water side flow path is consistent with the cooling water side flow path, that is, the second heat exchanger 3 and the PTC heater 6, the first water pump 7, the three-way valve 8 and the first heat exchanger 1 in the cooling refrigerant side flow path are connected in sequence to form a circulation loop; wherein, the circulating liquid flowing into the second heat exchange channel 12 can be heated by the PTC heater 6 as needed to complete the adjustment of the warm air temperature, and then controlled and adjusted by the HVAC assembly according to the instructions of the control end.

[0081] like Figure 1 The invention also includes: a battery thermal management unit, the battery thermal management unit having a battery cooling circuit for cooling the battery (battery cooling), the battery cooling circuit including a battery cooling refrigerant side flow path and a battery cooling water side flow path;

[0082] The battery cooling refrigerant side flow path includes a circulation loop formed by sequentially connecting the fourth valve 15 and the fifth heat exchange element 16 in parallel to both sides of the first heat exchange element 1 in the cooling refrigerant side flow path, that is, Figure 1 As shown, a circulation loop is formed by the compressor 2, the second heat exchange element 3, the first valve 9, the third heat exchange element 4, the second valve 13, the drying bottle 10, the fourth heat exchange element 5, the fourth valve 15, the fifth heat exchange element 16, and then back to the fourth heat exchange element 5; wherein, the fifth heat exchange element 16 includes a seventh heat exchange channel 161 and an eighth heat exchange channel 162.

[0083] Based on the previously connected flow paths, the battery cooling refrigerant side flow path now has the following new connection methods: one end of the fifth heat exchange channel 51 is connected to the seventh heat exchange channel 161 via the fourth branch pipeline, and the other end is connected to the sixth heat exchange channel 52 via a pipeline; the fourth valve 15 is provided on the fourth branch pipeline. Optionally, the fourth valve is an electronic expansion valve EXV; the fifth heat exchange element 16 is a battery cooler; corresponding to the battery cooler, its refrigerant channel side forms the seventh heat exchange channel 161, and its water side channel forms the eighth heat exchange channel 162;

[0084] To sum up, the principle of the battery cooling refrigerant side flow path is: the medium-temperature and high-pressure liquid refrigerant formed by further condensation through the sixth heat exchange channel 52 in the fourth heat exchange element 5 passes through the fourth valve 15 to form a low-temperature and low-pressure liquid refrigerant, enters the fifth heat exchange element 162 for further heat exchange to become a low-temperature and low-pressure liquid refrigerant, and finally enters the compressor 2 through the sixth heat exchange channel 52 to form a circulation loop.

[0085] like Figure 1 As shown, the battery cooling water side flow path includes a fifth heat exchange element 16, a second water pump 17 and a battery 18 which are sequentially connected to form a circulation flow path;

[0086] One end of the eighth heat exchange channel 162 is connected to the input end of the second water pump 17 through a pipeline, and the other end is connected to the output end of the battery 18 through a pipeline; the output end of the second water pump 17 is connected to the input end of the battery 18, and the battery 18 is cooled by circulating liquid.

[0087] In combination with the above-mentioned contents of the battery cooling water side flow path, the battery cooling water side flow path further includes a first reversing valve 19, a second reversing valve 20 and a third reversing valve 21; each reversing valve has a first reversing inlet and a second reversing inlet, and each reversing inlet corresponds to a first flow channel and a second flow channel; optionally, the first reversing valve 19, the second reversing valve 20 and the third reversing valve 21 are all four-way valves;

[0088] like Figure 1 As shown, the first flow channel (ac) corresponding to the first reversing inlet a of the first reversing valve 19, where ac represents the flow channel from the first reversing inlet a of the first reversing valve 19 to the outlet c; the flow channel formed by the flow direction is connected to the pipeline connecting the eighth heat exchange channel 162 and the input end of the second water pump 17;

[0089] The first flow channel (ac) corresponding to the first reversing inlet a of the second reversing valve 20, the second flow channel (bd) corresponding to the second reversing inlet b of the first reversing valve 19, and the second flow channel (ad) corresponding to the first reversing inlet a of the third reversing valve 21 are sequentially connected to the connecting pipeline between the eighth heat exchange channel 162 and the output end of the battery 18, so that the medium in the circuit can selectively flow into the designated pipeline.

[0090] like Figure 1 The battery thermal management unit also has a battery heating circuit, which includes a battery heating refrigerant side flow path and a battery heating water side flow path that cooperate with each other;

[0091] The battery heating water side flow path includes a circulation loop formed by connecting the sixth heat exchange element 22 in parallel on both sides of the first heat exchange element 1 in the cooling water side flow path; the sixth heat exchange element 22 includes a ninth heat exchange channel 221 and a tenth heat exchange channel 222, that is, the second heat exchange element 3, the PTC heater 6, the first water pump 7, the three-way valve 8, the sixth heat exchange element 22, and then returning to the second heat exchange element 3 to form a circulation loop; preferably, the type of the sixth heat exchange element is a plate heat exchanger, corresponding to the plate heat exchanger, its cold side channel forms the ninth heat exchange channel 221, and its hot side channel forms the tenth heat exchange channel 222.

[0092] Based on the above-mentioned connected flow paths, the connection method of the battery heating water side flow path is newly added: one end of the tenth heat exchange channel 222 is connected to the second outlet c of the three-way valve 8, and the other end thereof is connected to the connecting pipeline of the second heat exchange channel 12 and the third heat exchange channel 31 through a pipeline, so that the medium in the tenth heat exchange channel 222 flows into the third heat exchange channel 31 through the pipeline; this connection connects the second heat exchange channel 12 (warm air core) and the tenth heat exchange channel 222 in parallel and uses the three-way valve 8 to adjust the flow. When the battery 18 has a heating temperature rise demand, the sixth heat exchange component 22 participates in the battery heating cycle. If not needed, the sixth heat exchange component 22 does not participate in the cycle, thereby reducing the energy consumption of the thermal management system.

[0093] In addition, if Figure 1 As shown, the flow path on the battery heating refrigerant side is consistent with the flow path on the heating refrigerant side, that is, from the compressor 2, the second heat exchange element 3, the drying bottle 10, the fourth heat exchange element 5, the third heat exchange element, and then back to the fourth heat exchange element 5 to enter the compressor 2, forming a circulation loop.

[0094] like Figure 1 As shown, the auxiliary thermal management unit is also included. The auxiliary thermal management unit includes a dehumidification circuit for dehumidifying the environment in spring and autumn (air conditioning dehumidification) to prevent excessive humidity in the vehicle and improve driving safety. Specifically, the dehumidification circuit includes a heating and dehumidification refrigerant side flow path, a heating and dehumidification water side flow path, and a cooling and dehumidification refrigerant side flow path.

[0095] The heating and dehumidification refrigerant side flow path also includes a first sub-flow path and a second sub-flow path for coordinated flow;

[0096] The first sub-flow path includes a circulation loop formed by the compressor 2, the second heat exchanger 3, the drying bottle 10, the fourth heat exchanger 5 and the first heat exchanger 1 in the refrigeration refrigerant side flow path, which are connected in sequence; the second sub-flow path is consistent with the heating refrigerant side flow path, that is, from the compressor 2, the second heat exchanger 3, the drying bottle 10, the fourth heat exchanger 5, the third heat exchanger 4, and then back to the fourth heat exchanger 5 to enter the compressor 2, forming a circulation loop.

[0097] The cooling and dehumidification refrigerant side flow path is consistent with the cooling and dehumidification refrigerant side flow path, and the heating and dehumidification water side flow path is consistent with the cooling water side flow path, which will not be explained here.

[0098] like Figure 1 As shown, the auxiliary thermal management unit also includes a defrost circuit for defrosting the air conditioner; the defrost circuit includes a PTC heater defrost refrigerant side flow path and a PTC heater defrost water side flow path and a heating defrost refrigerant side flow path that cooperate with the flow; the defrost circuit effectively reduces the frost (caused by the temperature difference between hot and cold) generated by the third heat exchange component 4 when exchanging heat with the outside air, so that the thermal management system provided in the application itself can operate in a lower temperature environment.

[0099] The PTC heater defrost water side flow path includes the fifth heat exchange element 16 in the battery cooling water side flow path and the first radiator 23, the fourth reversing valve 24, the power supply unit 25 and the third water pump 26, which are connected in sequence to form a circulation loop; optionally, the fourth reversing valve 24 is a four-way valve; the power supply unit 25 is composed of an electric drive and a DCDC converter; in actual application, the power supply unit 25 and the third water pump 26 may not participate in the PTC heater defrost water side flow path, but a water pump must be added between the third reversing valve 21 and the first radiator 23 or a water pump must be added between the fourth reversing valve 24 and the first radiator 23. At this time, the PTC heater defrost water side flow path can utilize the waste heat of the air to participate in the heat exchange of the circuit; a 1:2 expansion kettle is used in the circuit where the battery 18 is located and the circuit where the power supply unit 25 is located, and a throttle valve is added to the exhaust circuit to avoid mutual influence of water temperature in the circuit.

[0100] Based on the connectivity relationship between the various components of the above-mentioned system, a new connection method is added to the defrost water side flow path of the PTC heater: the eighth heat exchange channel 162 is connected to the input end of the first radiator 23 through the second flow channel (ad) corresponding to the first reversing inlet a of the first reversing valve 19; the output end of the first radiator 23 is connected to the input end of the power supply device 25, and the output end of the power supply device 25 is connected to the input end of the third water pump; the output end of the third water pump 26 is connected to the eighth heat exchange channel 162 through the second flow channel (bd) corresponding to the second reversing inlet b of the fourth reversing valve 24 and the second flow channel (bd) corresponding to the second reversing inlet b of the third reversing valve 21. It should be noted that in this circuit, the heat generated by the operation of the power supply device 25 itself can also participate in the heat exchange of the circuit, playing a role in waste heat utilization.

[0101] In addition, the PTC heater defrost refrigerant side flow path and the heating defrost refrigerant side flow path are consistent with the battery refrigerant side flow path, and will not be described here.

[0102] Specifically, if Figure 1 As shown, the auxiliary thermal management unit also includes a power supply device temperature equalization circuit and a battery temperature equalization circuit, so that the thermal management system provided by the present application can operate more stably; specifically, the power supply device temperature equalization circuit and the battery temperature equalization circuit respectively include a power supply device water side flow path and a battery water side flow path;

[0103] The water side flow path of the power supply device includes a circulation loop formed by sequentially connecting the fourth reversing valve 24, the power supply device 25 and the third water pump 26 in the defrost water side flow path of the PTC heater.

[0104] The battery water side flow path includes a circulation loop formed by sequentially connecting the battery 18, the first reversing valve 19, the second reversing valve 20 and the second water pump 17 in the battery cooling water side flow path.

[0105] Furthermore, the water side flow path of the power supply device and the water side flow path of the battery can be understood as a sub-loop of the PTC heater defrost water side flow path and the battery cooling water side flow path respectively; during the circulation process of the loop, the power supply device 25 and the battery 18 can be subjected to temperature equalization treatment (the heat generated by the power supply device 25 and the battery 18 themselves can be circulated and dissipated), thereby improving the safety and working efficiency of the power supply device 25 and the battery 18.

[0106] like Figure 1 , and also includes a power supply device heat drive flow path, which includes a circulation loop formed by the power supply device 25, the third water pump 26, the fourth reversing valve 24, the third reversing valve 21 and the first radiator 23 in the defrost water side flow path of the PTC heater, which are connected in sequence.

[0107] Among them, in the heat drive flow path of the power supply device, the fourth reversing valve 24 is connected to the first flow channel (bc) corresponding to the second reversing inlet b of the third reversing valve 21 through the second flow channel (bd) corresponding to its second reversing inlet b, and then enters the first radiator 23 through the outlet c of the third reversing valve 21, and then enters the power supply device 25 through the first flow channel (ac) corresponding to the first reversing inlet a of the fourth reversing valve 24, completing the circulation loop.

[0108] like Figure 1 The thermal management system also includes several pressure sensors and temperature sensors, which are used to collect the temperature and pressure of each circuit, monitor the temperature and pressure of the thermal management system, and improve the safety and working efficiency of the thermal management system.

[0109] Specifically, the pressure sensors are represented by PT1 and PT2 in the figure, and the temperature sensors are represented by T-T5 in the figure; preferably, T1, T2, T4 and T5 are water temperature sensors; T3 is a refrigerant temperature sensor; and T is a temperature sensor.

[0110] The following is a supplementary explanation of the thermal management system of the above-mentioned new energy vehicle.

[0111] (1) Based on the above, it can be seen that the thermal management system of new energy vehicles has multiple units and multiple circuits corresponding to each unit. Most of the circuits also have coordinated circulation flow paths. Therefore, this application can operate multiple circulation flow paths together to form multiple comprehensive circuits to meet people's functional requirements for the thermal management system;

[0112] For example, in actual operation, it is necessary to operate mode 1: air conditioning cooling + battery cooling + motor cooling. The corresponding comprehensive circuit can be:

[0113] like Figure 1As shown, the refrigerant side circulation flow path of mode 1: path ① is consistent with the refrigeration refrigerant side flow path; path ② is consistent with the battery refrigeration refrigerant side flow path: at this time, path ① and path ② are carried out simultaneously.

[0114] Water side circulation flow path of mode 1: path ① is consistent with the battery cooling water side flow path; path ② is consistent with the power supply device heat drive flow path; path ③ is consistent with the cooling water side flow path; at this time, path ①, path ② and path ③ are carried out simultaneously.

[0115] The second operating mode is required: air conditioning dehumidification + battery cooling. The corresponding comprehensive circuit can be:

[0116] like Figure 1 As shown, the refrigerant side circulation flow path of mode 2: path ① is consistent with the refrigeration refrigerant side flow path; path ② is consistent with the battery refrigeration refrigerant side flow path; at this time, path ① and path ② are carried out simultaneously.

[0117] Water side circulation flow path of mode 2: path ① is consistent with the battery cooling water side flow path; path ② is consistent with the cooling water side flow path; at this time, path ① and path ② are carried out simultaneously.

[0118] (2) The new energy vehicle thermal management system provided in this application can serve as a basic architecture, on the basis of which a variety of solutions can be derived. For example, integrating some components into modules can reduce the number of refrigerant and water side pipelines, thereby improving layout efficiency, reducing the difficulty of vehicle layout, and saving space; or merging the functions of four-way valves into other multi-way valves to reduce costs.

[0119] Example 2

[0120] The present application provides a vehicle that is equipped with the above-mentioned thermal management system of a new energy vehicle. The thermal management system improves the heat exchange efficiency while ensuring that the entire vehicle can achieve multi-temperature zone temperature regulation, while reducing energy consumption during the operation of the thermal management system to ensure vehicle power.

[0121] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A thermal management system for a new energy vehicle, characterized in that: include: An air conditioning heat pump unit, the air conditioning heat pump unit having a refrigeration circuit, the refrigeration circuit comprising a refrigeration refrigerant side flow path and a refrigeration water side flow path that flow in conjunction with each other, the refrigeration refrigerant side flow path and the refrigeration water side flow path both comprising a first heat exchange element (1); The first heat exchange element (1) comprises a first heat exchange channel (11) and a second heat exchange channel (12); the first heat exchange channel (11) is connected to the refrigeration refrigerant side flow path, and the second heat exchange channel (12) is connected to the cooling water side flow path; the medium in the refrigeration refrigerant side flow path and the medium in the cooling water side flow path are mixed through the first heat exchange element (1) to form a first medium; wherein the temperature of the first medium can be adjusted by the ratio of the medium in the cooling medium side flow path to the medium in the water side flow path; A battery thermal management unit, wherein the battery thermal management unit has a battery cooling circuit, and the battery cooling circuit includes: a battery cooling water side flow path; The battery cooling water side flow path includes a fifth heat exchange element (16), a second water pump (17), and a battery (18) which are sequentially connected to form a circulation flow path; the fifth heat exchange element (16) includes a seventh heat exchange channel (161) and an eighth heat exchange channel (162); One end of the eighth heat exchange channel (162) is connected to the input end of the second water pump (17) through a pipeline, and the other end is connected to the output end of the battery (18) through a pipeline; the output end of the second water pump (17) is connected to the input end of the battery (18); The battery cooling water side flow path further includes: a first reversing valve (19), a second reversing valve (20), and a third reversing valve (21); each reversing valve has a first reversing inlet and a second reversing inlet, and each reversing inlet corresponds to a first flow channel and a second flow channel; A first flow channel corresponding to a first reversing inlet of the first reversing valve (19) is connected to a pipeline communicating with an input end of the eighth heat exchange channel (162) and a second water pump (17); The first flow channel corresponding to the first reversing inlet of the second reversing valve (20), the second flow channel corresponding to the second reversing inlet of the first reversing valve (19), and the second flow channel corresponding to the first reversing inlet of the third reversing valve (21) are sequentially connected to the connecting pipeline between the eighth heat exchange channel (162) and the output end of the battery (18).

2. A thermal management system for a new energy vehicle according to claim 1, characterized in that: The refrigeration refrigerant side flow path comprises a compressor (2), a second heat exchange element (3), a third heat exchange element (4), a fourth heat exchange element (5) and a first heat exchange element (1) which are sequentially connected to form a circulation flow path; The second heat exchange element (3) includes a third heat exchange channel (31) and a fourth heat exchange channel (32); the fourth heat exchange element (5) includes a fifth heat exchange channel (51) and a sixth heat exchange channel (52); the fifth heat exchange channel (51), the first heat exchange channel (11) and the sixth heat exchange channel (52) are connected in sequence through pipelines; The output end of the compressor (2) is in communication with the fourth heat exchange channel (32), and the input end thereof is in communication with the sixth heat exchange channel (52); one end of the third heat exchange element (4) is in communication with the fourth heat exchange channel (32) via a pipeline, and the other end thereof is in communication with the fifth heat exchange channel (51) via a pipeline.

3. The thermal management system of a new energy vehicle according to claim 2, characterized in that: The cooling water side flow path comprises a circulation loop formed by sequentially connecting the second heat exchange element (3) in the cooling refrigerant side flow path, a PTC heater (6), a first water pump (7), a three-way valve (8), and the first heat exchange element (1); The input end of the PTC heater (6) is in communication with the third heat exchange channel (31), and the output end thereof is in communication with the input end of the first water pump (7); the three-way valve (8) comprises an inlet, a first outlet, and a second outlet; the inlet is in communication with the output end of the first water pump (7); the first outlet is in communication with the second heat exchange channel (12), and the third heat exchange channel (31) is in communication with the second heat exchange channel (12) via a pipeline.

4. A thermal management system for a new energy vehicle according to claim 3, characterized in that: The refrigeration refrigerant side flow path also includes: a first valve (9), the first valve (9) being arranged on the pipeline between the third heat exchange element (4) and the fourth heat exchange channel (32); a drying bottle (10), the drying bottle (10) being arranged between the third heat exchange element (4) and the fourth heat exchange element (5); an inlet of the drying bottle (10) being connected to the third heat exchange element (4) via a pipeline, and an outlet thereof being connected to the fifth heat exchange channel (51) via a pipeline; a second valve (13), the second valve (13) being arranged on a pipeline connecting the third heat exchange element (4) and the drying bottle (10); A third valve (14), the third valve (14) is arranged on a pipeline connecting the fifth heat exchange channel (51) and the first heat exchange channel (11).

5. The thermal management system of a new energy vehicle according to claim 4, characterized in that: The air conditioning heat pump unit also has a heating circuit, which includes a heating refrigerant side flow path and a heating water side flow path that flow in coordination; The heating refrigerant side flow path includes the compressor (2), the second heat exchange element (3), the drying bottle (10), the fourth heat exchange element (5) and the third heat exchange element (4) in the cooling refrigerant side flow path, which are connected in sequence to form a circulation loop; The pipeline connecting the third heat exchange element (4) and the fourth heat exchange channel (32) comprises a first branch pipeline and a second branch pipeline spaced apart with the first valve (9) as a dividing point; the first branch pipeline is located on a side of the first valve (9) close to the second heat exchange element (3); the first branch pipeline is connected to the pipeline connecting the third heat exchange element (4) and the drying bottle (10), and the connecting port of the first branch pipeline and the pipeline is located between the second valve (13) and the drying bottle (10); the second branch pipeline is connected to the sixth heat exchange channel (52); The pipeline connecting the fifth heat exchange channel (51) and the first heat exchange channel (11) comprises a third branch pipeline and a fourth branch pipeline; the fifth heat exchange channel (51) is connected to the connecting pipeline between the third heat exchange element (4) and the drying bottle (10) through the third branch pipeline, and the connecting port of the third branch pipeline and the connecting pipeline between the third heat exchange element (4) and the drying bottle (10) is located on the side of the second valve (13) away from the drying bottle (10).

6. The thermal management system of a new energy vehicle according to claim 5, characterized in that: The battery refrigeration circuit also includes a battery refrigeration refrigerant side flow path; The battery refrigeration refrigerant side flow path includes a circulation loop formed by sequentially connecting a fourth valve (15) and a fifth heat exchange element (16) in parallel to both sides of the first heat exchange element (1) in the refrigeration refrigerant side flow path; One end of the fifth heat exchange channel (51) is connected to the seventh heat exchange channel (161) through a fourth branch pipeline, and the other end is connected to the sixth heat exchange channel (52) through a pipeline; the fourth valve (15) is provided on the fourth branch pipeline.

7. A thermal management system for a new energy vehicle according to claim 6, characterized in that: The battery thermal management unit further comprises a battery heating circuit, which includes a battery heating refrigerant side flow path and a battery heating water side flow path; The battery heating water side flow path includes a circulation loop formed by connecting a sixth heat exchange element (22) in parallel to both sides of the first heat exchange element (1) in the cooling water side flow path; the sixth heat exchange element (22) includes a ninth heat exchange channel (221) and a tenth heat exchange channel (222); One end of the tenth heat exchange channel (222) is connected to the second outlet, and the other end is connected to the connecting pipeline of the second heat exchange channel (12) and the third heat exchange channel (31) through a pipeline, so that the medium in the tenth heat exchange channel (222) flows into the third heat exchange channel (31).

8. A thermal management system for a new energy vehicle according to claim 7, characterized in that: It also includes an auxiliary thermal management unit, the auxiliary thermal management unit includes a dehumidification circuit; the dehumidification circuit includes a heating and dehumidification refrigerant side flow path and a heating and dehumidification water side flow path and a cooling and dehumidification refrigerant side flow path that flow in coordination; Wherein, the heating and dehumidification refrigerant side flow path also includes a first sub-flow path and a second sub-flow path for coordinated flow; The first sub-flow path comprises a circulation loop formed by sequentially connecting the compressor (2), the second heat exchange element (3), the drying bottle (10), the fourth heat exchange element (5) and the first heat exchange element (1) in the refrigeration refrigerant side flow path.

9. A thermal management system for a new energy vehicle according to claim 8, characterized in that: The auxiliary thermal management unit also includes a defrost circuit; the defrost circuit includes a PTC heater defrost refrigerant side flow path and a PTC heater defrost water side flow path and a heating defrost refrigerant side flow path; The PTC heater defrost water side flow path includes the fifth heat exchange element (16) in the battery cooling water side flow path, as well as the first radiator (23), the fourth reversing valve (24), the power supply device (25) and the third water pump (26), which are connected in sequence to form a circulation loop; The eighth heat exchange channel (162) is communicated with the input end of the first radiator (23) through the first reversing valve (19); the output end of the third water pump (26) is communicated with the eighth heat exchange channel (162) through the flow passage of the fourth reversing valve (24) and the third reversing valve (21).

10. A thermal management system for a new energy vehicle according to claim 9, characterized in that: The auxiliary thermal management unit further includes a power supply device temperature equalizing circuit and a battery temperature equalizing circuit; the power supply device temperature equalizing circuit and the battery temperature equalizing circuit respectively include a power supply device water side flow path and a battery water side flow path; The water side flow path of the power supply device includes a circulation loop formed by sequentially connecting the fourth reversing valve (24), the power supply device (25) and the third water pump (26) in the defrost water side flow path of the PTC heater; The battery water side flow path includes a circulation loop formed by sequentially connecting the battery (18), the first reversing valve (19), the second reversing valve (20) and the second water pump (17) in the battery cooling water side flow path.

11. A thermal management system for a new energy vehicle according to claim 10, characterized in that: The heat-driving flow path of the power supply device is also included, and the heat-driving flow path of the power supply device includes a circulation loop formed by sequentially connecting the power supply device (25), the third water pump (26), the fourth reversing valve (24), the third reversing valve (21) and the first radiator (23) in the defrost water side flow path of the PTC heater.

12. A thermal management system for a new energy vehicle according to claim 1, characterized in that: The thermal management system further includes a plurality of pressure sensors and temperature sensors for collecting the temperature and pressure of each circuit.

13. A vehicle, characterized in that: A thermal management system for a new energy vehicle is used, comprising the thermal management system according to any one of claims 1 to 12.

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