Integrated thermal management system and control method

Abstract

The invention relates to the technical field of electric automobiles, in particular to an integrated heat management system and a control method. The compressor module is connected with an external heat exchange module, an HVAC assembly module and a heating module. The external heat exchange module is connected with the HVAC assembly module, and the external heat exchange module is connected with a battery cooling refrigerant module; the heating module is connected with the HVAC assembly module; the battery cooling refrigerant module is connected with a power battery cooling loop; the power battery cooling loop is connected with an electric drive loop; electric drive and battery multi-scene waste heat recovery can be achieved, cooling liquid heat is fully utilized, the COP of a heat management system is improved, and the endurance mileage of the whole vehicle is increased; and meanwhile, compared with an existing heat management system, fewer multi-way valves and Chiller are used, and independent arrangement or integrated arrangement of the heat pump system of the whole vehicle is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles. Specifically, the present invention relates to an integrated thermal management system and a control method therefor. Background Art

[0002] In pure electric vehicle models, due to the problem of cell attenuation in winter, the battery energy is low, seriously reducing the driving range; based on the comfort requirements of the passenger compartment, using a PTC (Positive Temperature Coefficient) heater will consume a large amount of electricity, exacerbating the problem of driving range reduction; thus, each vehicle model has introduced a heat pump system to improve the COP (Coefficient of Performance) energy efficiency and reduce power consumption; however, in the existing thermal management systems, there are many multi-pass water valves, which cannot be designed for integrated thermal management, and a dual-core chiller (battery cooler) is used, increasing the system cost; moreover, the secondary loop has a slow response, resulting in overheating and wasting heat, reducing the COP energy efficiency of the system.

[0003] After retrieval, the applicant found that a Chinese patent document with the publication number of 116901648A disclosed a thermal management device, a thermal management system, and an electric vehicle on October 20, 2023. The thermal management device includes a refrigerant flow path and a coolant system. The coolant system includes a condenser, an evaporator, an electric heater, a first water pump, a second water pump, and a coolant circulation loop. The refrigerant channels of the condenser and the evaporator are connected in series to the refrigerant flow path. The condenser and the evaporator respectively have a first coolant channel and a second coolant channel. The first water pump and the second water pump are respectively connected to the first coolant channel and the second coolant channel. The electric heater is selectively connected in series to the outlet of the first coolant channel. The coolant circulation loop can selectively connect the first coolant channel and / or the second coolant channel to form a coolant circulation; this device also cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide an integrated thermal management system and a control method therefor that can achieve waste heat recovery in multiple scenarios of the electric drive and the battery. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated thermal management system and a control method therefor that can achieve waste heat recovery in multiple scenarios of the electric drive and the battery.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows: An integrated thermal management system, including a compressor module; the compressor module is respectively connected to an external heat exchange module, an HVAC assembly module, and a heating module; the external heat exchange module is connected to the HVAC assembly module, and the external heat exchange module is connected to a battery cooling refrigerant module; the heating module is connected to the HVAC assembly module; the battery cooling refrigerant module is connected to a power battery cooling circuit; the power battery cooling circuit is connected to an electric drive circuit.

[0007] The compressor module includes a compressor; the compressor is respectively connected to a liquid cooler and a gas-liquid separator; the external heat exchange module includes an external heat exchanger; a first expansion valve is connected between the external heat exchanger and the liquid cooler; an electric fan is connected to the external heat exchanger.

[0008] The HVAC assembly module includes an HVAC assembly; the HVAC assembly is connected to a second expansion valve; the HVAC assembly includes a front evaporator, a front heater core, and a front blower; the front evaporator is respectively connected to the second expansion valve and the gas-liquid separator.

[0009] The liquid cooler includes a refrigerant pipeline and a coolant pipeline; the refrigerant pipeline is connected to the compressor; the heating module includes a heating water kettle; the heating water kettle is connected to a heating water pump; the heating water pump is respectively connected to the coolant pipeline and the front heater core; the coolant pipeline is connected to the front heater core.

[0010] The battery cooling refrigerant module includes a Chiller; the Chiller is connected to a third expansion valve, and the Chiller is connected to the gas-liquid separator.

[0011] The power battery cooling circuit includes a battery water pump; the battery water pump is respectively connected to a power battery and a first five-way valve; the power battery is connected to a second five-way valve; the Chiller includes a Chiller refrigerant pipeline and a Chiller coolant pipeline; the Chiller coolant pipeline is respectively connected to the first five-way valve and the second five-way valve; the first five-way valve is respectively connected to the heating water pump and the front heater core.

[0012] The electric drive circuit includes an electric drive water pump; the electric drive water pump is respectively connected to an electric drive water kettle, a low-temperature radiator, and a three-in-one electric drive system; the three-in-one electric drive system is connected to an electric drive controller; the electric drive controller is connected to an electric drive; the second five-way valve is respectively connected to the low-temperature radiator, the electric drive, and the electric drive water pump; the first five-way valve is connected to the electric drive water pump.

[0013] A control method for the above-mentioned integrated thermal management system is specifically as follows:

[0014] In the refrigeration condition of the passenger compartment, the compressor module outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module; the external heat exchange module outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant flows into the HVAC assembly module; the HVAC assembly outputs cold air; the HVAC assembly outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module for recycling.

[0015] In the power battery cooling condition, the compressor module outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module; the external heat exchange module outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant enters the battery cooling refrigerant module, and the Chiller cools the coolant in the power battery cooling circuit to achieve power battery cooling; the battery cooling refrigerant module outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module for recycling.

[0016] In the low-temperature dehumidification condition of the passenger compartment, the compressor module outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant is split into the first high-temperature and high-pressure gaseous refrigerant and the second high-temperature and high-pressure gaseous refrigerant; the first high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module, and the external heat exchange module outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module for recycling; the second high-temperature and high-pressure gaseous refrigerant flows into the HVAC assembly module, and the front evaporator absorbs heat to cool and dehumidify the air in the passenger compartment; the HVAC assembly module outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module for recycling.

[0017] It also includes:

[0018] In the heating (external heat absorption) condition of the passenger compartment, the compressor module outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module, and the external heat exchange module outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module for recycling; the high-temperature and high-pressure gaseous refrigerant output by the compressor module flows into the liquid cooler, and the liquid cooler heats the coolant in the heating module. The heating module outputs high-temperature coolant, and the high-temperature coolant flows into the HVAC assembly module, and the front heater core heats the air. The HVAC assembly outputs hot air, and the HVAC assembly module outputs low-temperature coolant to the liquid cooler for recycling.

[0019] In the passenger compartment heating (motor waste heat recovery) condition, the compressor module outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module; the Chiller absorbs the heat of the high-temperature coolant in the electric drive circuit, the battery cooling refrigerant module outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant flows into the compressor module for recycling; the high-temperature and high-pressure gaseous refrigerant output by the compressor module flows into the liquid cooler, the liquid cooler heats the coolant in the heating module, the heating module outputs high-temperature coolant, the high-temperature coolant flows into the HVAC assembly module, the front warm air core heats the air, the HVAC assembly outputs hot air, and the HVAC assembly module outputs low-temperature coolant to the liquid cooler for recycling;

[0020] In the passenger compartment heating (battery waste heat recovery) condition, the compressor module outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module; the Chiller absorbs the heat of the high-temperature coolant in the power battery cooling circuit, the battery cooling refrigerant module outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant flows into the compressor module for recycling; the high-temperature and high-pressure gaseous refrigerant output by the compressor module flows into the liquid cooler, the liquid cooler heats the coolant in the heating module, the heating module outputs high-temperature coolant, the high-temperature coolant flows into the HVAC assembly module, the front warm air core heats the air, the HVAC assembly outputs hot air, and the HVAC assembly module outputs low-temperature coolant to the liquid cooler for recycling.

[0021] In the passenger compartment cooling condition, the power battery cooling condition, and the passenger compartment low-temperature dehumidification condition, the electric drive circuit dissipates heat, and the electric drive water pump outputs low-temperature coolant; the low-temperature coolant flows through the integrated electric drive system, the electric drive controller, and the electric drive in sequence to achieve heat dissipation; the electric drive outputs high-temperature coolant, and the high-temperature coolant flows into the low-temperature radiator through the second five-way valve; the low-temperature radiator outputs low-temperature coolant; the low-temperature coolant enters the electric drive water pump for recycling;

[0022] In the passenger compartment low-temperature dehumidification condition, the high-temperature and high-pressure gaseous refrigerant output by the compressor module flows into the liquid cooler, the liquid cooler heats the coolant in the heating module, the heating module outputs high-temperature coolant, the high-temperature coolant flows into the HVAC assembly module, the front warm air core heats the cold air output by the front evaporator, mixes it into air at an appropriate temperature, and sends it into the passenger compartment, and the HVAC assembly module outputs low-temperature coolant to the liquid cooler for recycling.

[0023] The beneficial effects of this application are:

[0024] Through the cooperation of the compressor module, external heat exchange module, HVAC assembly module, heating module, battery cooling refrigerant module, power battery cooling circuit and electric drive circuit, this application can achieve the waste heat recovery of the electric drive and battery in multiple scenarios, make full use of the coolant heat, improve the COP of the thermal management system, and increase the cruising range of the whole vehicle; at the same time, compared with the existing thermal management system, this application uses fewer multi-way valves and chillers, which is beneficial to the independent layout or integrated layout of the heat pump system for the whole vehicle. Brief Description of the Drawings

[0025] The following further elaborates on the specific implementation manners of the present invention in conjunction with the drawings, where:

[0026] Figure 1 is a schematic structural diagram of this integrated thermal management system.

[0027] Figure 2 is a schematic diagram of the principle of the passenger compartment refrigeration condition of this integrated thermal management system.

[0028] Figure 3 is a schematic diagram of the principle of the power battery cooling condition of this integrated thermal management system.

[0029] Figure 4 is a schematic diagram of the principle of the passenger compartment low-temperature dehumidification condition of this integrated thermal management system.

[0030] Figure 5 is a schematic diagram of the principle of the passenger compartment heating (external heat absorption) condition of this integrated thermal management system.

[0031] Figure 6 is a schematic diagram of the principle of the passenger compartment heating (motor waste heat recovery) condition of this integrated thermal management system.

[0032] Figure 7 is a schematic diagram of the principle of the passenger compartment heating (battery waste heat recovery) condition of this integrated thermal management system.

[0033] The markings in the above figures are all:

[0034] The markings in the figure are:

[0035] 1. Compressor module, 101. Compressor, 102. Liquid cooler, 103. Gas-liquid separator, 104. Refrigerant pipeline, 105. Coolant pipeline,

[0036] 2. External heat exchange module, 201. External heat exchanger, 202. First expansion valve, 203. Electric fan,

[0037] 3. HVAC assembly module, 301. HVAC assembly, 302. Second expansion valve, 303. Front evaporator, 304. Front heater core, 305. Front blower,

[0038] 4. Heating module, 401. Heating kettle, 402. Heater water pump

[0039] 5. Battery cooling refrigerant module

[0040] 6. Chiller, 601. Third expansion valve, 602. Chiller refrigerant pipeline, 603. Chiller coolant pipeline

[0041] 7. Power battery cooling circuit, 701. Battery water pump, 702. Power battery, 703. First five-way valve, 704. Second five-way valve

[0042] 8. Electric drive circuit, 801. Electric drive water pump, 802. Electric drive kettle, 803. Low-temperature radiator, 804. Three-in-one electric drive system, 805. Electric drive controller, 806. Electric drive Detailed implementation manners

[0043] The following further describes in detail the specific implementation manners of the present invention by describing the embodiments with reference to the accompanying drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention and facilitate its implementation.

[0044] Figure 1 The shown integrated thermal management system includes a compressor module 1; the compressor module 1 is respectively connected to an external heat exchange module 2, an HVAC assembly module 3 and a heating module 4; the external heat exchange module 2 is connected to the HVAC assembly module 3, and the external heat exchange module 2 is connected to a battery cooling refrigerant module 5; the heating module 4 is connected to the HVAC assembly module 3; the battery cooling refrigerant module 5 is connected to a power battery cooling circuit 7; the power battery cooling circuit 7 is connected to an electric drive circuit 8.

[0045] In this application, through the mutual cooperation of the compressor module 1, the external heat exchange module 2, the HVAC assembly module 3, the heating module 4, the battery cooling refrigerant module 5, the power battery cooling circuit 7 and the electric drive circuit 8, the waste heat recovery in multiple scenarios of the electric drive and the battery can be realized, the heat of the coolant can be fully utilized, the COP of the thermal management system can be improved, and the cruising range of the whole vehicle can be increased; at the same time, compared with the existing thermal management system, this application uses fewer multi-way valves and chillers, which is beneficial to the independent layout or integrated layout of the heat pump system for the whole vehicle.

[0046] The compressor module 1 includes a compressor 101; the compressor 101 is respectively connected to a liquid cooler 102 and a gas-liquid separator 103; the external heat exchange module 2 includes an external heat exchanger 201; a first expansion valve 202 is connected between the external heat exchanger 201 and the liquid cooler 102; an electric fan 203 is connected to the external heat exchanger 201.

[0047] The compressor 101 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, increasing the pressure and temperature of the refrigerant and providing power for the refrigeration cycle. The compressed high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 101 and enters the liquid cooler 102. The liquid cooler 102 uses the coolant to exchange heat with the high-temperature and high-pressure gaseous refrigerant, causing the gaseous refrigerant to release heat and gradually condense into a liquid refrigerant. The liquid refrigerant cooled by the liquid cooler 102 then flows into the gas-liquid separator 103. The gas-liquid separator 103 separates a small amount of gaseous refrigerant that may be mixed in the liquid refrigerant, ensuring that the refrigerant entering the subsequent refrigeration components is mainly liquid, in order to improve the refrigeration efficiency and the stability of the system. The separated gaseous refrigerant will then return to the intake port of the compressor 101 to participate in the next compression cycle.

[0048] One end of the outlet of the liquid cooler 102 is connected to one end of the first expansion valve 202, and the high-temperature and high-pressure liquid refrigerant cooled by the liquid cooler 102 flows into the first expansion valve 202. The first expansion valve 202 automatically adjusts the valve opening to throttle and reduce the pressure of the high-temperature and high-pressure liquid refrigerant, turning it into a low-temperature and low-pressure gas-liquid mixture state. When the valve of the first expansion valve 202 is fully open, it directly outputs high-temperature and high-pressure refrigerant.

[0049] The other end of the first expansion valve 202 is connected to the external heat exchanger 201. After the low-temperature and low-pressure gas-liquid mixed refrigerant or high-temperature and high-pressure refrigerant enters the external heat exchanger 201, it starts to exchange heat with the external environment. The external heat exchanger 201 has a large heat exchange area and good thermal conductivity. An electronic fan 203 is connected to the external heat exchanger 201. After the electronic fan 203 is powered on, it rotates to accelerate the flow of air on the surface of the external heat exchanger 201.

[0050] The HVAC assembly module 3 includes the HVAC assembly 301. The HVAC assembly 301 is connected with a second expansion valve 302. The HVAC assembly 301 includes a front evaporator 303, a front heater core 304, and a front blower 305. The front evaporator 303 is respectively connected to the second expansion valve 302 and the gas-liquid separator 103.

[0051] HVAC stands for heating, ventilation, and air conditioning. The second expansion valve 302 is connected to the HVAC assembly 301. By adjusting its own opening degree, the second expansion valve 302 throttles the high-pressure liquid refrigerant when it passes through, and the pressure drops rapidly, thus turning it into a low-temperature and low-pressure gas-liquid mixture state refrigerant.

[0052] The low-temperature and low-pressure gas-liquid mixed refrigerant flows out of the second expansion valve 302 and enters the front evaporator 303. When the outside air is blown over the surface of the front evaporator 303 by the front blower 305, the refrigerant absorbs the heat in the air, causing the air temperature to drop, and the refrigerant itself gradually vaporizes; the gas-liquid separator 103 is connected to the front evaporator 303, and separates the liquid refrigerant that has not been completely vaporized in the front evaporator 303, allowing only the gaseous refrigerant to enter the subsequent circulation; the front warm air core 304 can heat the air; when heating is required, the front blower 305 blows the air through the front warm air core 304, and the temperature of the air rises after absorbing heat, thereby realizing the heating function.

[0053] The liquid cooler 102 includes a refrigerant pipeline 104 and a coolant pipeline 105; the refrigerant pipeline 104 is connected to the compressor 101; the heating module 4 includes a heating kettle 401; the heating kettle 401 is connected to a warm air water pump 402; the warm air water pump 402 is respectively connected to the coolant pipeline 105 and the front warm air core 304; the coolant pipeline 105 is connected to the front warm air core 304.

[0054] The refrigerant pipeline 104 is connected to the compressor 101, and the compressor 101 outputs high-temperature and high-pressure gaseous refrigerant into the refrigerant pipeline 104; the coolant pipeline 105 has coolant flowing in it; the working principle of the liquid cooler 102 is to utilize the coolant to perform heat exchange with the high-temperature and high-pressure gaseous refrigerant in the refrigerant pipeline 104, the coolant absorbs the heat of the refrigerant, and the high-temperature and high-pressure gaseous refrigerant is gradually condensed into high-pressure liquid refrigerant, while the temperature of the coolant itself increases;

[0055] The heating kettle 401 is used to store coolant and provide a reserve of coolant for the entire heating module 4; the warm air water pump 402 is connected to the heating kettle 401 to allow the coolant to circulate in the loop; the inlet of the warm air water pump 402 is connected to the coolant pipeline 105; the outlet of the warm air water pump 402 is connected to the front warm air core 304, so that the coolant that has absorbed heat can be input into the front warm air core 304.

[0056] The battery cooling refrigerant module 5 includes a Chiller 6 ; the Chiller 6 is connected to a third expansion valve 601 , and the Chiller 6 is connected to a gas-liquid separator 103 .

[0057] The third expansion valve 601 throttles and reduces the pressure of the high-pressure liquid refrigerant coming from upstream by changing its own opening size; when the high-pressure liquid refrigerant passes through the throttling effect of the third expansion valve 601, the pressure drops rapidly and turns into a low-temperature and low-pressure gas-liquid mixed state; this low-temperature and low-pressure gas-liquid mixed refrigerant then enters Chiller 6.

[0058] The Chiller 6 can perform heat exchange between the coolant and the refrigerant; the coolant takes away the heat generated by the battery, and the high-temperature coolant meets the low-temperature and low-pressure gas-liquid mixed refrigerant in the Chiller 6; due to the temperature difference, the heat in the coolant will be transferred to the refrigerant, causing the refrigerant to gradually vaporize after absorbing the heat; while the coolant releases heat and its temperature decreases, and then it can circulate again to continue cooling the battery.

[0059] The power battery cooling circuit 7 includes a battery water pump 701; the battery water pump 701 is respectively connected to a power battery 702 and a first five-way valve 703; the power battery 702 is connected to a second five-way valve 704; the Chiller 6 includes a Chiller refrigerant pipeline 602 and a Chiller coolant pipeline 603; the Chiller coolant pipeline 603 is respectively connected to the first five-way valve 703 and the second five-way valve 704; the first five-way valve 703 is respectively connected to a heater water pump 402 and a front heater core 304.

[0060] The battery water pump 701 can make the coolant circulate in the circuit; when the battery water pump 701 starts, the coolant is pumped out and flows to the power battery 702; the power battery 702 generates heat during operation, and after the coolant flows into the power battery 702, it absorbs the heat generated by the battery through heat exchange; when the coolant flows into the Chiller coolant pipeline 603, the low-temperature and low-pressure gas-liquid mixed refrigerant flows in the Chiller refrigerant pipeline 602, and the coolant and the refrigerant perform heat exchange in the Chiller 6, and the coolant transfers the heat to the refrigerant, and its own temperature decreases, realizing the cooling of the coolant.

[0061] The first five-way valve 703 includes interfaces 1, 2, 3, 4, 5; the second five-way valve 704 includes interfaces a, b, c, d, e.

[0062] The electric drive circuit 8 includes an electric drive water pump 801; the electric drive water pump 801 is respectively connected to an electric drive water kettle 802, a low-temperature radiator 803 and a three-in-one electric drive system 804; the three-in-one electric drive system 804 is connected to an electric drive controller 805; the electric drive controller 805 is connected to an electric drive 806; the second five-way valve 704 is respectively connected to the low-temperature radiator 803, the electric drive 806 and the electric drive water pump 801; the first five-way valve 703 is connected to the electric drive water pump 801.

[0063] A control method for an integrated thermal management system is specifically as follows:

[0064] As Figure 2As shown, in the passenger compartment cooling condition, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2; the external heat exchange module 2 outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant flows into the HVAC assembly module 3; the HVAC assembly 301 outputs cold air; the HVAC assembly 301 outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 for another cycle;

[0065] As Figure 3 shown, in the power battery cooling condition, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2; the external heat exchange module 2 outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant enters the battery cooling refrigerant module 5, and the Chiller 6 cools the coolant in the power battery cooling circuit 7 to achieve the cooling of the power battery 702; the battery cooling refrigerant module 5 outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 for another cycle;

[0066] As Figure 4 shown, in the passenger compartment low-temperature dehumidification condition, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant is split into the first high-temperature and high-pressure gaseous refrigerant and the second high-temperature and high-pressure gaseous refrigerant; the first high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2, and the external heat exchange module 2 outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 for another cycle; the second high-temperature and high-pressure gaseous refrigerant flows into the HVAC assembly module 3, and the front evaporator 303 absorbs heat to cool and dehumidify the air in the passenger compartment; the HVAC assembly module 3 outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 for another cycle.

[0067] In the passenger compartment cooling condition,

[0068] Refrigerant circuit: The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 101 enters the liquid cooler 102, without heat exchange. The high-temperature refrigerant passes through the first expansion valve 202 (fully opened), enters the external heat exchanger 201 for sufficient heat release to become high-pressure and low-temperature refrigerant, enters the second expansion valve 302 for throttling to become low-temperature and low-pressure refrigerant. The refrigerant enters the front evaporator 303 in the HVAC assembly 301 for evaporation and heat absorption. The refrigerant then returns to the compressor 101 after passing through the gas-liquid separator 103 to achieve the passenger compartment cooling function.

[0069] Electric drive cooling circuit: At this time, due to the high ambient temperature, power modules such as the electric drive 806 and the integrated electric drive system 804 need to be cooled and dissipated. The electric drive water pump 801 operates, and the low-temperature coolant sequentially enters the integrated electric drive system 804, the electric drive controller 805, and the electric drive 806 to cool the heating components. The coolant becomes high-temperature coolant, passes through the second five-way valve 704, and the interface d of the second five-way valve 704 is connected to the interface b, and then enters the low-temperature radiator 803. The electronic fan in the low-temperature radiator 803 cools the high-temperature coolant, and finally the low-temperature coolant returns to the electric drive water pump 801 to achieve the cooling of the heating power components.

[0070] In the battery cooling condition,

[0071] Refrigerant circuit: The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 101 enters the liquid cooler 102, without heat exchange. The high-temperature refrigerant passes through the first expansion valve 202 (fully opened), enters the external heat exchanger 201 to release heat fully and becomes a high-pressure and low-temperature refrigerant, enters the third expansion valve 601 to throttle into a low-temperature and low-pressure refrigerant, and the refrigerant enters the Chiller refrigerant pipeline 602 of the Chiller 6 to evaporate, absorbing the heat on the coolant side in the Chiller coolant pipeline 603. The refrigerant then returns to the compressor 101 after passing through the gas-liquid separator 103 to achieve the battery cooling function.

[0072] Coolant circuit: At the same time as the above refrigerant working process, the battery water pump 701 operates, pumps the low-temperature coolant into the power battery 702 to cool the battery cells in the power battery 702, and then enters the second five-way valve 704. The interface a is connected to the interface e, and the high-temperature coolant enters the Chiller coolant pipeline 603 of the Chiller 6, and is cooled by the low-temperature refrigerant in the above process and then becomes a low-temperature coolant. It is connected through the interface 5 and the interface 1 in the first five-way valve 703, and the low-temperature coolant returns to the battery water pump 701.

[0073] In the passenger compartment low-temperature dehumidification condition,

[0074] Refrigerant circuit:

[0075] The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 101 enters the refrigerant pipeline 104 of the liquid cooler 102 and exchanges heat with the coolant in the coolant pipeline 105 to heat the coolant; the first high-temperature and high-pressure gaseous refrigerant passes through the first expansion valve 202 (small opening, throttling), becomes a low-temperature and low-pressure refrigerant and enters the external heat exchanger 201. The electric fan 203 operates, and the low-temperature refrigerant absorbs heat from the air. The low-temperature refrigerant enters the gas-liquid separator 103; after the second high-temperature and high-pressure gaseous refrigerant comes out of the liquid cooler 102, it enters the second expansion valve 302, is throttled to become a low-temperature and low-pressure refrigerant, enters the front evaporator 303 in the HVAC assembly 301, and absorbs heat in the front evaporator 303 to cool, condense water, and dehumidify the air in the passenger compartment; the refrigerant enters the gas-liquid separator 103, where it converges with the refrigerant in the first path and then returns to the compressor 101 together to achieve the function of dehumidifying the passenger compartment.

[0076] Coolant circuit: While the above refrigerant is working, the warm water pump 402 operates and the water heating PTC does not operate; the coolant in the coolant pipeline 105 absorbs the heat of the refrigerant in the liquid cooler 102 and becomes high-temperature coolant. After passing through the water heating PTC, it is pumped into the first five-way valve 703 by the warm water pump 402. Interface 3 is connected to interface 2, and the coolant enters the front warm air core 304 in the HVAC assembly 301 to heat the cold air behind the front evaporator 303, mix into air at an appropriate temperature, and send it into the passenger compartment. The coolant becomes low-temperature coolant and returns to the liquid cooler 102.

[0077] It also includes:

[0078] As Figure 5 shown, in the heating (external heat absorption) condition of the passenger compartment, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2, and the external heat exchange module 2 outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 and circulates again; the high-temperature and high-pressure gaseous refrigerant output by the compressor module 1 flows into the liquid cooler 102, and the liquid cooler 102 heats the coolant in the heating module 4. The heating module 4 outputs high-temperature coolant, and the high-temperature coolant flows into the HVAC assembly module 3. The front warm air core 304 heats the air, and the HVAC assembly 301 outputs hot air. The HVAC assembly module 3 outputs low-temperature coolant to the liquid cooler 102 and circulates again;

[0079] As Figure 6As shown in the figure, in the passenger compartment heating (motor waste heat recovery) condition, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module 5; the Chiller 6 absorbs the heat of the high-temperature coolant in the electric drive circuit 8, and the battery cooling refrigerant module 5 outputs low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows into the compressor module 1 for recycling; the high-temperature and high-pressure gaseous refrigerant output by the compressor module 1 flows into the liquid cooler 102, and the liquid cooler 102 heats the coolant in the heating module 4. The heating module 4 outputs high-temperature coolant, and the high-temperature coolant flows into the HVAC assembly module 3. The front warm air core 304 heats the air, and the HVAC assembly 301 outputs hot air. The HVAC assembly module 3 outputs low-temperature coolant to the liquid cooler 102 for recycling;

[0080] As Figure 7 shown in the figure, in the passenger compartment heating (battery waste heat recovery) condition, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module 5; the Chiller 6 absorbs the heat of the high-temperature coolant in the power battery cooling circuit 7, and the battery cooling refrigerant module 5 outputs low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows into the compressor module 1 for recycling; the high-temperature and high-pressure gaseous refrigerant output by the compressor module 1 flows into the liquid cooler 102, and the liquid cooler 102 heats the coolant in the heating module 4. The heating module 4 outputs high-temperature coolant, and the high-temperature coolant flows into the HVAC assembly module 3. The front warm air core 304 heats the air, and the HVAC assembly 301 outputs hot air. The HVAC assembly module 3 outputs low-temperature coolant to the liquid cooler 102 for recycling.

[0081] In the passenger compartment heating (external heat exchange and heat absorption) condition,

[0082] Refrigerant circuit:

[0083] The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 101 enters the refrigerant pipeline 104 of the liquid cooler 102 to exchange heat with the coolant in the coolant pipeline 105 and heat the coolant; the high-temperature and high-pressure gaseous refrigerant passes through the first expansion valve 202 (small opening, throttling) and becomes low-temperature and low-pressure refrigerant and enters the external heat exchanger 201. The electric fan 203 works, and the low-temperature refrigerant absorbs the heat in the air. The low-temperature refrigerant enters the gas-liquid separator 103 and returns to the compressor 101, so as to absorb and utilize the heat in the environment.

[0084] Coolant circuit:

[0085] While the above-mentioned refrigerant is working, the heater water pump 402 works and the water heater PTC does not work; the coolant in the coolant pipeline 105 absorbs the heat of the refrigerant in the liquid cooler 102 and becomes high-temperature coolant. After passing through the water heater PTC, it is pumped into the first five-way valve 703 by the heater water pump 402. Interface 3 is connected to interface 2, and the coolant enters the front heater core 304 in the HVAC assembly 301. The front heater core 304 heats the cold air and sends it into the passenger compartment. The coolant becomes low-temperature coolant and returns to the liquid cooler 102.

[0086] Electric drive cooling circuit: Since this working condition is used when the ambient temperature is relatively low, the electric drive circuit 8 mainly stores heat and has no excess heat dissipation. Therefore, the electric drive water pump 801 in the electric drive circuit 8 works, and pumps the coolant into the integrated electric drive system 804, the electric drive controller 805, and the electric drive 806 in sequence to heat the coolant. The coolant enters the second five-way valve 704, and interface d is connected to interface c. The coolant returns to the electric drive water pump 801. Since there is no external heat dissipation heat exchanger in the circuit, during the driving condition, the coolant in the electric drive circuit 8 stores heat. As the water temperature rises to a specific threshold, the waste heat recovery working condition can be carried out.

[0087] Passenger compartment heating (motor waste heat recovery) working condition,

[0088] Refrigerant circuit: The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 101 enters the refrigerant pipeline 104 of the liquid cooler 102 and exchanges heat with the coolant in the coolant pipeline 105 to heat the coolant; after the high-temperature and high-pressure gaseous refrigerant comes out of the liquid cooler 102, it enters the third expansion valve 601 to be throttled into low-temperature and low-pressure refrigerant. The refrigerant enters the Chiller refrigerant pipeline 602 of the Chiller 6 for evaporation, absorbs the heat on the coolant side in the Chiller coolant pipeline 603, and then returns to the compressor 101 after passing through the gas-liquid separator 103.

[0089] Coolant circuit:

[0090] While the above-mentioned refrigerant working process is taking place, the electric drive water pump 801 works, and pumps the coolant into the integrated electric drive system 804, the electric drive controller 805, and the electric drive 806 in sequence to heat the coolant; the high-temperature coolant enters the second five-way valve 704, and interface d is connected to interface e. The coolant enters the coolant pipeline 603 of the Chiller 6. After the heat is absorbed by the refrigerant, it becomes low-temperature coolant, and then enters the first five-way valve 703. Interface 5 is connected to interface 4, and the low-temperature coolant returns to the electric drive water pump 801; the above working cycle is combined with the refrigerant cycle to realize the motor waste heat recovery function;

[0091] The heater water pump 402 operates while the water heating PTC does not. The coolant in the coolant pipeline 105 absorbs the heat of the refrigerant in the liquid cooler 102 and becomes high-temperature coolant. After passing through the water heating PTC, it is pumped into the first five-way valve 703 by the heater water pump 402. Interface 3 is connected to interface 2, and the coolant enters the front heater core 304 in the HVAC assembly 301. The front heater core 304 heats the cold air and sends it into the passenger compartment. The coolant becomes low-temperature coolant and returns to the liquid cooler 102.

[0092] In the working condition of heating the passenger compartment (recovering the waste heat of the battery),

[0093] In the scenario of charging the battery with the charging gun plugged in, the coolant in the battery pack can be appropriately heated and kept warm by the charging pile. Since the volume of the coolant in the battery pack is relatively large, a relatively abundant heat source can be formed. In winter, this cycle can be utilized scenario-based to improve the COP of the heat pump system.

[0094] Refrigerant circuit:

[0095] The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 101 enters the refrigerant pipeline 104 of the liquid cooler 102 and exchanges heat with the coolant in the coolant pipeline 105 to heat the coolant. After the high-temperature and high-pressure gaseous refrigerant comes out of the liquid cooler 102, it enters the third expansion valve 601 to be throttled into low-temperature and low-pressure refrigerant. The refrigerant enters the Chiller refrigerant pipeline 602 of the Chiller 6 for evaporation, absorbs the heat on the coolant side in the Chiller coolant pipeline 603, and then returns to the compressor 101 after passing through the gas-liquid separator 103.

[0096] Coolant circuit:

[0097] Simultaneously with the above refrigerant working process, the battery water pump 701 operates, pumping the low-temperature coolant into the power battery 702 to cool the battery cells in the power battery 702, and then entering the second five-way valve 704. Interface a is connected to interface e, and the high-temperature coolant enters the Chiller coolant pipeline 603 of the Chiller 6, is cooled by the low-temperature refrigerant in the above process and then becomes low-temperature coolant, and returns to the battery water pump 701 through the connection between interface 5 and interface 1 in the first five-way valve 703.

[0098] The heater water pump 402 operates while the water heating PTC does not. The coolant in the coolant pipeline 105 absorbs the heat of the refrigerant in the liquid cooler 102 and becomes high-temperature coolant. After passing through the water heating PTC, it is pumped into the first five-way valve 703 by the heater water pump 402. Interface 3 is connected to interface 2, and the coolant enters the front heater core 304 in the HVAC assembly 301. The front heater core 304 heats the cold air and sends it into the passenger compartment. The coolant becomes low-temperature coolant and returns to the liquid cooler 102.

[0099] Electric drive cooling circuit: Since this operating condition is used when the ambient temperature is relatively low, the electric drive circuit 8 mainly stores heat and has no excess heat to dissipate. Therefore, the electric drive water pump 801 in the electric drive circuit 8 operates, pumping the coolant into the integrated electric drive system 804, electric drive controller 805, and electric drive 806 in sequence to heat the coolant. The coolant enters the second five-way valve 704, and interface d is connected to interface c. The coolant returns to the electric drive water pump 801. Since there is no external heat dissipation heat exchanger in the circuit, during driving conditions, the coolant in the electric drive circuit 8 stores heat. As the water temperature rises to a specific threshold, the waste heat recovery condition can be carried out.

[0100] In the passenger compartment refrigeration condition, power battery cooling condition, and passenger compartment low-temperature dehumidification condition, the electric drive circuit 8 dissipates heat, and the electric drive water pump 801 outputs low-temperature coolant; the low-temperature coolant flows through the integrated electric drive system 804, electric drive controller 805, and electric drive 806 in sequence to achieve heat dissipation; the electric drive 806 outputs high-temperature coolant, and the high-temperature coolant flows into the low-temperature radiator 803 through the second five-way valve 704; the low-temperature radiator 803 outputs low-temperature coolant; the low-temperature coolant enters the electric drive water pump 801 for recycling again;

[0101] In the passenger compartment low-temperature dehumidification condition, the high-temperature and high-pressure gaseous refrigerant output by the compressor module 1 flows into the liquid cooler 102. The liquid cooler 102 heats the coolant in the heating module 4. The heating module 4 outputs high-temperature coolant. The high-temperature coolant flows into the HVAC assembly module 3. The front heater core 304 heats the cold air output by the front evaporator 303 and mixes it into air at an appropriate temperature and sends it into the passenger compartment. The HVAC assembly module 3 outputs low-temperature coolant to the liquid cooler 102 for recycling again.

[0102] The specific working process of the present invention is as follows:

[0103] In the passenger compartment refrigeration condition, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2; the external heat exchange module 2 outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant flows into the HVAC assembly module 3; the HVAC assembly 301 outputs cold air; the HVAC assembly 301 outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 for recycling again;

[0104] In the power battery cooling condition, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2; the external heat exchange module 2 outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant enters the battery cooling refrigerant module 5, and the Chiller 6 cools the coolant in the power battery cooling circuit 7 to achieve the cooling of the power battery 702; the battery cooling refrigerant module 5 outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 for recycling again;

[0105] In the low-temperature dehumidification condition of the passenger compartment, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant is split into the first high-temperature and high-pressure gaseous refrigerant and the second high-temperature and high-pressure gaseous refrigerant; the first high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2, and the external heat exchange module 2 outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 and circulates again; the second high-temperature and high-pressure gaseous refrigerant flows into the HVAC assembly module 3, and the front evaporator 303 absorbs heat to cool, condense water and dehumidify the air in the passenger compartment; the HVAC assembly module 3 outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 and circulates again.

[0106] In the heating (external heat absorption) condition of the passenger compartment, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module 2, and the external heat exchange module 2 outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module 1 and circulates again; the high-temperature and high-pressure gaseous refrigerant output by the compressor module 1 flows into the liquid cooler 102, and the liquid cooler 102 heats the coolant in the heating module 4. The heating module 4 outputs high-temperature coolant, and the high-temperature coolant flows into the HVAC assembly module 3. The front heater core 304 heats the air, and the HVAC assembly 301 outputs hot air. The HVAC assembly module 3 outputs low-temperature coolant to the liquid cooler 102 and circulates again;

[0107] In the heating (motor waste heat recovery) condition of the passenger compartment, the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module 5; the Chiller 6 absorbs the heat of the high-temperature coolant in the electric drive circuit 8, and the battery cooling refrigerant module 5 outputs low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows into the compressor module 1 and circulates again; the high-temperature and high-pressure gaseous refrigerant output by the compressor module 1 flows into the liquid cooler 102, and the liquid cooler 102 heats the coolant in the heating module 4. The heating module 4 outputs high-temperature coolant, and the high-temperature coolant flows into the HVAC assembly module 3. The front heater core 304 heats the air, and the HVAC assembly 301 outputs hot air. The HVAC assembly module 3 outputs low-temperature coolant to the liquid cooler 102 and circulates again;

[0108] In the heating mode of the passenger compartment (battery waste heat recovery), the compressor module 1 outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module 5; the chiller 6 absorbs the heat of the high-temperature coolant in the power battery cooling circuit 7, and the battery cooling refrigerant module 5 outputs low-temperature and low-pressure gaseous refrigerant, which flows into the compressor module 1 for recycling; the high-temperature and high-pressure gaseous refrigerant output by the compressor module 1 flows into the liquid cooler 102, and the liquid cooler 102 heats the coolant in the heating module 4. The heating module 4 outputs high-temperature coolant, and the high-temperature coolant flows into the HVAC assembly module 3. The front heater core 304 heats the air, and the HVAC assembly 301 outputs hot air. The HVAC assembly module 3 outputs low-temperature coolant to the liquid cooler 102 for recycling.

[0109] The present invention has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims

1. An integrated thermal management system, characterized in that: It includes a compressor module (1); the compressor module (1) is respectively connected to an external heat exchange module (2), an HVAC assembly module (3), and a heating module (4); the external heat exchange module (2) is connected to the HVAC assembly module (3), and the external heat exchange module (2) is connected to a battery cooling refrigerant module (5); the heating module (4) is connected to the HVAC assembly module (3); the battery cooling refrigerant module (5) is connected to a power battery cooling circuit (7); the power battery cooling circuit (7) is connected to an electric drive circuit (8).

2. An integrated thermal management system according to claim 1, wherein: The compressor module (1) includes a compressor (101); the compressor (101) is respectively connected to a liquid cooler (102) and a gas-liquid separator (103); the external heat exchange module (2) includes an external heat exchanger (201); a first expansion valve (202) is connected between the external heat exchanger (201) and the liquid cooler (102); an electric fan (203) is connected to the external heat exchanger (201).

3. An integrated thermal management system according to claim 2, characterized in that: The HVAC assembly module (3) includes an HVAC assembly (301); the HVAC assembly (301) is connected to a second expansion valve (302); the HVAC assembly (301) includes a front evaporator (303), a front warm air core (304), and a front blower (305); the front evaporator (303) is respectively connected to the second expansion valve (302) and the gas-liquid separator (103).

4. An integrated thermal management system according to claim 3, characterized in that: The liquid cooler (102) includes a refrigerant pipeline (104) and a coolant pipeline (105); the refrigerant pipeline (104) is connected to the compressor (101); the heating module (4) includes a heating water kettle (401); the heating water kettle (401) is connected to a warm water pump (402); the warm water pump (402) is respectively connected to the coolant pipeline (105) and the front warm air core (304); the coolant pipeline (105) is connected to the front warm air core (304).

5. An integrated thermal management system according to claim 4, wherein: The battery cooling refrigerant module (5) includes a Chiller (6); the Chiller (6) is connected to a third expansion valve (601), and the Chiller (6) is connected to the gas-liquid separator (103).

6. An integrated thermal management system according to claim 5, wherein: The power battery cooling circuit (7) includes a battery water pump (701); the battery water pump (701) is respectively connected to a power battery (702) and a first five-way valve (703); the power battery (702) is connected to a second five-way valve (704); the Chiller (6) includes a Chiller refrigerant pipeline (602) and a Chiller coolant pipeline (603); the Chiller coolant pipeline (603) is respectively connected to the first five-way valve (703) and the second five-way valve (704); the first five-way valve (703) is respectively connected to the warm water pump (402) and the front warm air core (304).

7. An integrated thermal management system according to claim 6, characterized in that: The electric drive circuit (8) includes an electric drive water pump (801); the electric drive water pump (801) is respectively connected to an electric drive kettle (802), a low-temperature radiator (803) and a three-in-one electric drive system (804); the three-in-one electric drive system (804) is connected to an electric drive controller (805); the electric drive controller (805) is connected to an electric drive (806); the second five-way valve (704) is respectively connected to the low-temperature radiator (803), the electric drive (806) and the electric drive water pump (801); the first five-way valve (703) is connected to the electric drive water pump (801).

8. A control method for the integrated thermal management system according to any one of claims 1-7, characterized in that: Specifically: In the passenger compartment refrigeration condition, the compressor module (1) outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module (2); the external heat exchange module (2) outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant flows into the HVAC assembly module (3); the HVAC assembly (301) outputs cold air; the HVAC assembly (301) outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module (1) for recycling; In the power battery cooling condition, the compressor module (1) outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module (2); the external heat exchange module (2) outputs high-pressure and low-temperature refrigerant; the high-pressure and low-temperature refrigerant enters the battery cooling refrigerant module (5), and the Chiller (6) cools the coolant in the power battery cooling circuit (7) to achieve the cooling of the power battery (702); the battery cooling refrigerant module (5) outputs low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant enters the compressor module (1) for recycling; In the passenger compartment low-temperature dehumidification condition, the compressor module (1) outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant is split into a first high-temperature and high-pressure gaseous refrigerant and a second high-temperature and high-pressure gaseous refrigerant; the first high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module (2), and the external heat exchange module (2) outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module (1) for recycling; the second high-temperature and high-pressure gaseous refrigerant flows into the HVAC assembly module (3), and the front evaporator (303) absorbs heat to cool and dehumidify the air in the passenger compartment; the HVAC assembly module (3) outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module (1) for recycling.

9. The control method according to claim 8, wherein: It further includes: In the passenger compartment heating (external heat exchange and heat absorption) condition, the compressor module (1) outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the external heat exchange module (2), and the external heat exchange module (2) outputs low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor module (1) and circulates again; the high-temperature and high-pressure gaseous refrigerant output by the compressor module (1) flows into the liquid cooler (102), the liquid cooler (102) heats the coolant in the heating module (4), the heating module (4) outputs high-temperature coolant, the high-temperature coolant flows into the HVAC assembly module (3), the front heater core (304) heats the air, the HVAC assembly (301) outputs hot air, and the HVAC assembly module (3) outputs low-temperature coolant to the liquid cooler (102) and circulates again; In the passenger compartment heating (motor waste heat recovery) condition, the compressor module (1) outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module (5); the Chiller (6) absorbs the heat of the high-temperature coolant in the electric drive circuit (8), the battery cooling refrigerant module (5) outputs low-temperature and low-pressure gaseous refrigerant, the low-temperature and low-pressure gaseous refrigerant flows into the compressor module (1) and circulates again; the high-temperature and high-pressure gaseous refrigerant output by the compressor module (1) flows into the liquid cooler (102), the liquid cooler (102) heats the coolant in the heating module (4), the heating module (4) outputs high-temperature coolant, the high-temperature coolant flows into the HVAC assembly module (3), the front heater core (304) heats the air, the HVAC assembly (301) outputs hot air, and the HVAC assembly module (3) outputs low-temperature coolant to the liquid cooler (102) and circulates again; In the passenger compartment heating (battery waste heat recovery) condition, the compressor module (1) outputs high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant flows into the battery cooling refrigerant module (5); the Chiller (6) absorbs the heat of the high-temperature coolant in the power battery cooling circuit (7), the battery cooling refrigerant module (5) outputs low-temperature and low-pressure gaseous refrigerant, the low-temperature and low-pressure gaseous refrigerant flows into the compressor module (1) and circulates again; the high-temperature and high-pressure gaseous refrigerant output by the compressor module (1) flows into the liquid cooler (102), the liquid cooler (102) heats the coolant in the heating module (4), the heating module (4) outputs high-temperature coolant, the high-temperature coolant flows into the HVAC assembly module (3), the front heater core (304) heats the air, the HVAC assembly (301) outputs hot air, and the HVAC assembly module (3) outputs low-temperature coolant to the liquid cooler (102) and circulates again.

10. The control method according to any one of claims 8-9, characterized in that: In the refrigeration condition of the passenger compartment, the cooling condition of the power battery, and the low-temperature dehumidification condition of the passenger compartment, the electric drive circuit (8) dissipates heat, and the electric drive water pump (801) outputs low-temperature coolant; the low-temperature coolant sequentially flows through the integrated electric drive system (804), the electric drive controller (805), and the electric drive (806), thereby achieving heat dissipation; the electric drive (806) outputs high-temperature coolant, and the high-temperature coolant flows into the low-temperature radiator (803) through the second five-way valve (704); the low-temperature radiator (803) outputs low-temperature coolant; the low-temperature coolant enters the electric drive water pump (801) for recycling again; In the low-temperature dehumidification condition of the passenger compartment, the high-temperature and high-pressure gaseous refrigerant output by the compressor module (1) flows into the liquid cooler (102), the liquid cooler (102) heats the coolant in the heating module (4), the heating module (4) outputs high-temperature coolant, the high-temperature coolant flows into the HVAC assembly module (3), the front heater core (304) heats the cold air output by the front evaporator (303), mixes it into air at an appropriate temperature, and sends it into the passenger compartment, and the HVAC assembly module (3) outputs low-temperature coolant to the liquid cooler (102) for recycling again.

Images