Automobile heat pump system, heat management method and automobile

Abstract

The application provides an automobile heat pump system, a heat management method and an automobile. The method comprises the following steps: when it is determined that a passenger cabin has a first preset level of heating demand but does not require electric drive waste heat, storing the electric drive waste heat by using the heat storage effect of a battery pack, and heating the passenger cabin by using refrigerant; when it is determined that the passenger cabin has a second preset level of heating demand and requires electric drive waste heat, transmitting the electric drive waste heat stored by the battery pack and the current electric drive waste heat to the refrigerant, and then heating the passenger cabin by using the refrigerant.

Description

Technical Field

[0001] The present invention relates to the field of thermal management control of new energy vehicles, and in particular to an automobile heat pump system, a thermal management method and an automobile. Background Art

[0002] New energy vehicles suffer from low heating efficiency and high power consumption in low-temperature environments, leading to user complaints of significantly reduced vehicle range. To improve heating efficiency and optimize energy utilization within limited vehicle space and energy resources, numerous new technologies for vehicle thermal management have been developed, including heat pumps, electric drive waste heat utilization, thermal energy utilization, and passenger compartment waste heat recovery. However, each technology requires balancing multiple requirements, including improving system energy efficiency and reducing thermal management power consumption, leading to system complexity. Summary of the Invention

[0003] The present invention provides an automobile heat pump system, a thermal management method, and an automobile, which realize the recovery and utilization of electric drive waste heat by utilizing the thermal capacity effect of the battery pack.

[0004] The technical solution of the present invention is:

[0005] The present invention provides a thermal management method for an automobile heat pump system, comprising:

[0006] When it is determined that the passenger compartment has a first preset level of heating demand but does not require electric drive waste heat, the battery pack's thermal capacity effect is used to store the electric drive waste heat, and refrigerant is used to heat the passenger compartment;

[0007] When it is determined that the passenger compartment has a second preset level of heating demand and that electric drive waste heat is required, the electric drive waste heat stored in the battery pack and the waste heat currently generated by the electric drive are transferred to the refrigerant, thereby using the refrigerant to heat the passenger compartment;

[0008] The second preset level of heating demand is higher than the first preset level of heating demand.

[0009] Preferably, the method further comprises:

[0010] When it is determined that the passenger compartment has a cooling demand, the thermal capacity effect of the battery pack is used to store excess cooling capacity of the refrigerant, and the refrigerant is used to cool the passenger compartment.

[0011] Preferably, the method further comprises:

[0012] When it is determined that the battery pack has a heating demand, the refrigerant is used to heat the battery pack.

[0013] Preferably, the method further comprises:

[0014] When it is determined that the passenger compartment has a third preset level of heating demand but does not require electric drive waste heat, the battery pack's thermal capacity effect is used to store the electric drive waste heat, and the heater is used to heat the passenger compartment;

[0015] The third preset level heating demand is higher than the first preset level heating demand and the second preset level heating demand.

[0016] Preferably, when it is determined that the passenger compartment has a first preset level of heating demand but does not require electric drive waste heat, the step of storing the electric drive waste heat by utilizing the thermal capacity effect of the battery pack and heating the passenger compartment by utilizing a refrigerant includes:

[0017] forming a first passenger compartment heating circuit, an electric drive and battery coolant circuit, and a first refrigerant circuit;

[0018] The first refrigerant circuit is thermally coupled to the first passenger compartment heating circuit. The first refrigerant circuit exchanges the heat generated by itself to the first passenger compartment heating circuit to heat the passenger compartment; the waste heat of the electric drive is transferred to the battery pack via the electric drive and battery coolant circuit for storage.

[0019] Preferably, when it is determined that the passenger compartment has a second preset level of heating demand and electric drive waste heat is required, the step of transferring the electric drive waste heat stored in the battery pack and the waste heat currently generated by the electric drive to the refrigerant, and then using the refrigerant to heat the passenger compartment includes:

[0020] forming a first passenger compartment heating circuit, an electric drive and battery coolant circuit, a first refrigerant circuit, and a second refrigerant circuit;

[0021] The first refrigerant circuit is thermally coupled to the first passenger compartment heating circuit, the electric drive and battery coolant circuit is thermally coupled to the second refrigerant circuit, and the first refrigerant circuit and the second refrigerant circuit are in communication;

[0022] The waste heat stored in the battery pack and the waste heat currently generated by the electric drive undergo heat exchange through the electric drive and battery coolant circuit and the second refrigerant circuit, and then is transferred from the second refrigerant circuit to the first refrigerant circuit. The first refrigerant circuit exchanges the heat generated by itself and the heat it absorbs to the first passenger compartment heating circuit to heat the passenger compartment.

[0023] Preferably, when it is determined that the passenger compartment has a cooling demand, the steps of utilizing the thermal capacity effect of the battery pack to store excess cooling capacity of the refrigerant and utilizing the refrigerant to cool the passenger compartment include:

[0024] Forming an electric drive cooling circuit, a first refrigerant circuit, a second refrigerant circuit, and a battery cooling circuit;

[0025] The first refrigerant circuit and the second refrigerant circuit are connected, the second refrigerant circuit and the battery cooling circuit are thermally coupled, and the first refrigerant circuit and the electric drive coolant circuit are thermally coupled;

[0026] The heat generated by the first refrigerant circuit itself is heat-exchanged to the electric drive coolant circuit for cooling. Part of the cooled refrigerant is used to cool the passenger compartment, and the heat exchanged to the electric drive coolant circuit is dissipated by the electric drive coolant circuit; another part of the cooled refrigerant is transferred to the second refrigerant circuit, and then exchanged to the battery cooling circuit through the second refrigerant circuit, so that the battery pack can store excess cold.

[0027] Preferably, when it is determined that the battery pack has a heating demand, the step of heating the battery pack using a refrigerant includes:

[0028] forming a battery heating circuit, a first passenger compartment heating circuit, and a first refrigerant circuit;

[0029] The first passenger compartment heating circuit is connected to the battery heating circuit, and the first passenger compartment heating circuit is thermally coupled to the first refrigerant circuit; the first refrigerant circuit exchanges the heat generated by itself to the first passenger compartment heating circuit, and then transfers it to the battery heating circuit to heat the battery.

[0030] Preferably, when it is determined that the passenger compartment has a third preset level of heating demand but does not require electric drive waste heat, the step of storing the electric drive waste heat by utilizing the thermal capacity effect of the battery pack and heating the passenger compartment by utilizing the heater includes:

[0031] A second passenger compartment heating circuit and an electric drive and battery coolant circuit are formed; the second passenger compartment heating circuit uses the heat generated by itself to heat the passenger compartment; the waste heat of the electric drive is transferred to the battery pack for storage via the electric drive and battery coolant circuit.

[0032] The present invention provides an automotive heat pump system for implementing the above-mentioned automotive heat pump system thermal management method, comprising: a first passenger compartment heating circuit, a second passenger compartment heating circuit, a battery coolant circuit, an electric drive coolant circuit, an electric drive and battery coolant circuit, a first refrigerant circuit, and a second refrigerant circuit;

[0033] The first passenger compartment heating circuit is coupled to the first refrigerant circuit and / or the second refrigerant circuit via a water-cooled condenser, the battery coolant circuit is coupled to the second refrigerant circuit via a battery cooler, the electric drive coolant circuit is coupled to the first refrigerant circuit and / or the second refrigerant circuit via a water-cooled condenser, and the electric drive and battery coolant circuits are coupled to the second refrigerant circuit via a battery cooler;

[0034] The battery coolant circuit and the electric drive coolant circuit can coexist, but the battery coolant circuit and the electric drive coolant circuit do not coexist with the electric drive and battery coolant circuit; the first refrigerant circuit and the second refrigerant circuit share the refrigerant channel of the water-cooled condenser, the electric drive coolant circuit and the passenger compartment heating circuit share the coolant channel of the water-cooled condenser, and the first passenger compartment heating circuit and the second passenger compartment heating circuit do not coexist.

[0035] Preferably, the automobile heat pump system further comprises:

[0036] The battery heating circuit is connected to the first passenger compartment heating circuit or the second passenger compartment heating circuit.

[0037] Preferably, the automobile heat pump system comprises:

[0038] Multi-way valve, multi-inlet and one-outlet valve, multi-way proportional valve;

[0039] The formation of the first passenger compartment heating circuit, the second passenger compartment heating circuit, the battery heating circuit, the battery coolant circuit, the electric drive coolant circuit and the electric drive and battery coolant circuit relies on the switching control of multiple internal interfaces of the multi-way valve, the switching control of multiple internal valve ports of the multi-inlet and one-outlet valve, the switching control of multiple outlets of the multi-way proportional valve, and the opening and closing control of the electric drive water pump, the heating water pump and the battery water pump.

[0040] Preferably, the multi-way valve has 10 ports, from port A to port J; the multi-inlet and one-outlet valve has 4 valve ports, from valve port K to valve port N, where valve port N is the water outlet; and the multi-way proportional valve has 3 valve ports, from valve port O to valve port Q.

[0041] The battery coolant circuit includes: the battery pack, the battery water pump, the coolant channel of the battery cooler, the multi-way valve's interface D to interface H, and the check valve;

[0042] The water outlet of the battery pack is connected to the interface D of the multi-way valve, the interface D and interface E of the multi-way valve are connected in sequence, the interface E of the multi-way valve is connected to the interface H, the interface H of the multi-way valve is connected to the water inlet of the battery water pump, the coolant channel of the battery cooler is connected to the water outlet of the battery water pump and the interface G of the multi-way valve, the interface G of the multi-way valve is connected to the interface F, the interface F of the multi-way valve is connected to the water inlet of the check valve, and the water inlet of the check valve is connected to the water inlet of the battery pack.

[0043] Preferably, the electric drive coolant circuit comprises:

[0044] Electric water pump, electric drive, valve port L and valve port O of the multi-inlet and outlet valve, heating water pump, coolant channel of the water-cooled condenser, interface A to interface C and interface I of the multi-way valve, radiator; the water inlet of the electric water pump is connected to interface C of the multi-way valve, the water outlet of the electric water pump is connected to the water inlet of the electric drive, the water outlet of the electric drive is connected to valve port K of the multi-inlet and outlet valve, the valve port N of the multi-inlet and outlet valve is connected to the water inlet of the heating water pump, the coolant channel of the water-cooled condenser is connected between the water outlet of the heating water pump and interface I of the multi-way valve, interface I of the multi-way valve is connected to interface A, interface A is connected to the water inlet of the radiator, the water outlet of the radiator is connected to interface B of the multi-way valve, and interface B of the multi-way valve is connected to interface C.

[0045] Preferably, the electric drive and battery coolant circuit includes: a battery pack, a battery water pump, a coolant channel of a battery cooler, interfaces C to H and J of a multi-way valve, a check valve, an electric drive water pump, and an electric drive; the water outlet of the battery pack is connected to the interface D of the multi-way valve, the interface D and interface E of the multi-way valve are connected in sequence, the interface E of the multi-way valve is connected to the interface C, the water inlet of the electric drive water pump is connected to the interface C of the multi-way valve, the water outlet of the electric drive water pump is connected to the water inlet of the electric drive, the water outlet of the electric drive is connected to the interface J of the multi-way valve, the interface J of the multi-way valve is connected to the interface H, the interface H of the multi-way valve is connected to the water inlet of the battery water pump, the coolant channel of the battery cooler is connected to the water outlet of the battery water pump and the interface G of the multi-way valve, the interface G of the multi-way valve is connected to the interface F, the interface F of the multi-way valve is connected to the water inlet of the check valve, and the water inlet of the check valve is connected to the water inlet of the battery pack.

[0046] Preferably, the first passenger compartment heating circuit includes: a heating water pump, a coolant channel of a water-cooled condenser, a heater core, valve ports O and Q of a multi-way proportional valve, and valve ports M and N of a multi-inlet-one-outlet valve; valve port N of the multi-inlet-one-outlet valve is connected to the water inlet of the heating water pump, the coolant channel of the water-cooled condenser is connected between the water outlet of the heating water pump and the water inlet of the heater core, the water outlet of the heater core is connected to valve port O of the multi-way proportional valve, valve port O of the multi-way proportional valve is connected to valve port Q, valve port Q of the multi-way proportional valve is connected to valve port M of the multi-inlet-one-outlet valve, and valve port M of the multi-inlet-one-outlet valve is connected to valve port N;

[0047] The second passenger compartment heating circuit includes the first passenger compartment heating circuit and a water-heating electric heater, wherein the coolant channel of the water-cooled condenser is connected between the water outlet of the heating water pump and the water inlet of the water-heating electric heater, and the water inlet of the water-heating electric heater is connected to the water inlet of the heater core.

[0048] Preferably, the battery heating circuit: valve ports P and Q of the multi-way proportional valve, valve ports M and O of the multi-inlet and one-outlet valve, and the battery pack;

[0049] The valve port O of the multi-inlet and one-outlet valve is connected to the water inlet of the heating water pump, the water outlet of the heater core is connected to the valve port P of the multi-way proportional valve, the valve port P of the multi-way proportional valve is connected to the valve port Q, the valve port Q of the multi-way proportional valve is connected to the water inlet of the battery pack, the water outlet of the battery pack is connected to the valve port M of the multi-inlet and one-outlet valve, and the valve port M of the multi-inlet and one-outlet valve is connected to the valve port O.

[0050] Preferably, the first refrigerant circuit comprises: a compressor, a refrigerant channel of a water-cooled condenser, a first electronic expansion valve, an evaporator core and a gas-liquid separator which are sequentially connected to form a closed loop;

[0051] The second refrigerant circuit includes: a compressor, a refrigerant channel of a water-cooled condenser, a second electronic expansion valve, a refrigerant channel of a battery cooler, and a gas-liquid separator, which are sequentially connected to form a closed loop.

[0052] The present invention also provides an automobile, comprising the above automobile heat pump system.

[0053] The beneficial effects of the present invention are:

[0054] The present invention uses the battery pack as a heat capacitor. When the electric drive waste heat is not needed for heating the passenger compartment, the thermal capacity effect of the battery pack is used to store the electric drive waste heat. When the electric drive waste heat is needed for heating the passenger compartment, the waste heat stored in the battery pack and the electric drive waste heat are transferred to the refrigerant through heat exchange and then exchanged with the coolant in the first passenger compartment heating circuit to realize the utilization of the electric drive waste heat for heating the passenger compartment. While the electric drive waste heat is utilized to heat the passenger compartment, the battery pack can also store cold at the same time. In addition, when cooling the battery pack, the battery pack can use the refrigerant to cool it and store cold at the same time. The stored cold capacity can cool the battery pack when the battery pack is fast charged. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 is a schematic diagram of an automotive heat pump system in an embodiment of the present invention;

[0056] Figure 2 This is a working principle diagram of a car heat pump system for heating in an embodiment of the present invention;

[0057] Figure 3 This is a working principle diagram of using an automobile heat pump system to heat a battery pack in an embodiment of the present invention;

[0058] Figure 4 This is a working principle diagram of the automotive heat pump system refrigeration in an embodiment of the present invention;

[0059] Figure 5 This is a working principle diagram of an automotive heat pump system for electric drive heat dissipation in an embodiment of the present invention;

[0060] Figure 6 is a flow chart of a heat pump system control method according to an embodiment of the present invention;

[0061] Description of reference numerals:

[0062] 1-Compressor; 2-Water-cooled condenser; 3-First electronic expansion valve; 4-Evaporator core; 5-Second electronic expansion valve; 6-Battery cooler; 7-Gas-liquid separator; 8-Water-heating electric heater; 9-Warm air core; 10-Multi-way proportional valve; 11-Multi-inlet and one-outlet valve; 12-Electric water pump; 13-Electric drive; 14-Multi-way valve; 15-Heating water pump; 16-Water storage bottle; 17-Battery water pump; 18-Check valve; 19-Battery pack; 20-Radiator. DETAILED DESCRIPTION

[0063] This embodiment provides a thermal management method for an automotive heat pump system, including:

[0064] When it is determined that the passenger compartment has a first preset level of heating demand but does not require electric drive waste heat, the electric drive waste heat is stored using the thermal capacity effect of the battery pack, and the refrigerant is used to heat the passenger compartment.

[0065] Whether the passenger compartment requires heating is determined by user input. Whether electric drive waste heat is required for passenger compartment heating is determined based on the heating demand level. Specifically, if the passenger compartment heating demand is at the first preset heating demand level, the temperature is relatively low, and the heat provided by the refrigerant is sufficient to heat the passenger compartment. In this case, electric drive waste heat is deemed unnecessary.

[0066] The specific principle of using refrigerant to heat the passenger compartment is as follows:

[0067] A first passenger compartment heating circuit, an electric drive and battery coolant circuit, and a first refrigerant circuit are formed; the first refrigerant circuit is thermally coupled to the first passenger compartment heating circuit, and the first refrigerant circuit exchanges its own heat with the first passenger compartment heating circuit to heat the passenger compartment; the waste heat of the electric drive is transferred to the battery pack via the electric drive and battery coolant circuit for storage. At this time, the waste heat generated by the electric drive is transferred to the battery pack via the electric drive and battery coolant circuits, and the thermal capacity effect of the battery pack can recover and store this waste heat; at the same time, the heat generated in the first refrigerant circuit is heat-exchanged with the first passenger compartment heating circuit, so that the refrigerant heat is absorbed by the first passenger compartment heating circuit and then transferred to the heater core to heat the passenger compartment.

[0068] When it is determined that the passenger compartment has a second preset level of heating demand and requires electric drive waste heat, the electric drive waste heat stored in the battery pack and the waste heat currently generated by the electric drive are transferred to the refrigerant, and then the refrigerant is used to heat the passenger compartment.

[0069] If the passenger compartment heating demand reaches the second preset heating level, but the first preset heating level is lower than the second preset heating level, the passenger compartment heating demand temperature is relatively high, and the heat provided by the refrigerant is insufficient to heat the passenger compartment. In this case, the electric drive waste heat is determined to be required. In this case, the waste heat previously stored in the battery pack and the waste heat currently generated by the electric drive are transferred to the refrigerant through heat exchange, increasing the heating capacity provided by the refrigerant to the passenger compartment.

[0070] The specific principle of using refrigerant to heat the passenger compartment is as follows: forming a first passenger compartment heating circuit, an electric drive and battery coolant circuit, a first refrigerant circuit and a second refrigerant circuit; the first refrigerant circuit is thermally coupled with the first passenger compartment heating circuit, the electric drive and battery coolant circuit and the second refrigerant circuit are thermally coupled, and the first refrigerant circuit and the second refrigerant circuit are connected; the waste heat stored in the battery pack and the waste heat currently generated by the electric drive undergo heat exchange through the electric drive and battery coolant circuit and the second refrigerant circuit, and then are transferred to the first refrigerant circuit by the second refrigerant circuit, and the first refrigerant circuit exchanges the heat generated by itself and the heat absorbed by it to the first passenger compartment heating circuit, thereby heating the passenger compartment.

[0071] When the passenger compartment is determined to require cooling, the battery pack's thermal capacity is used to store excess refrigerant and use the refrigerant to cool the passenger compartment. The specific principle for utilizing refrigerant to cool the passenger compartment is as follows: an electric drive cooling circuit, a first refrigerant circuit, a second refrigerant circuit, and a battery cooling circuit are formed. The first refrigerant circuit and the second refrigerant circuit are connected, the second refrigerant circuit is thermally coupled to the battery cooling circuit, and the first refrigerant circuit is thermally coupled to the electric drive coolant circuit. Heat generated by the first refrigerant circuit is transferred to the electric drive coolant circuit for cooling. A portion of the cooled refrigerant is used to cool the passenger compartment, and the heat transferred to the electric drive coolant circuit is dissipated by the electric drive coolant circuit. The remaining portion of the cooled refrigerant is transferred to the second refrigerant circuit, and then transferred to the battery cooling circuit via the second refrigerant circuit, thereby storing excess cooling energy in the battery pack. When cooling the passenger compartment, the cooling capacity provided by the compressor at its lowest speed is still greater than the required cooling capacity. This excess cooling energy is recovered and stored through the battery pack's thermal capacity.

[0072] When it is determined that the battery pack requires heating, the refrigerant is used to heat the battery pack. The specific principle for using the refrigerant to heat the battery pack is as follows: a battery heating circuit, a first passenger compartment heating circuit, and a first refrigerant circuit are formed; the first passenger compartment heating circuit and the battery heating circuit are connected, and the first passenger compartment heating circuit and the first refrigerant circuit are thermally coupled; the first refrigerant circuit exchanges its own heat with the first passenger compartment heating circuit, which then transfers it to the battery heating circuit to heat the batteries.

[0073] In this embodiment, while the refrigerant is used to heat the battery pack, since the first passenger compartment heating circuit absorbs the heat of the first refrigerant circuit, the process of heating the battery pack is also accompanied by the process of heating and dehumidifying the passenger compartment.

[0074] If it is determined that the passenger compartment has a third preset level of heating demand but does not require electric drive waste heat, the battery pack's thermal capacity is used to store the electric drive waste heat and the heater is used to heat the passenger compartment. At this point, the passenger compartment heating demand reaches the third preset level, the highest level. At this point, the refrigerant and electric drive waste heat are insufficient to heat the passenger compartment, so the heater is directly activated to heat the passenger compartment.

[0075] The specific principle of using a heater to heat the passenger compartment is as follows: a second passenger compartment heating circuit and an electric drive and battery coolant circuit are formed; the second passenger compartment heating circuit uses the heat generated by itself to heat the passenger compartment; and the waste heat of the electric drive is transferred to the battery pack for storage via the electric drive and battery coolant circuit.

[0076] like Figure 1 In order to implement the above-mentioned automobile heat pump thermal management method, an embodiment of the present invention provides an automobile heat pump system, including: a battery heating circuit, a first passenger compartment heating circuit, a second passenger compartment heating circuit, a battery coolant circuit, an electric drive coolant circuit, an electric drive and battery coolant circuit, a first refrigerant circuit and a second refrigerant circuit; the battery heating circuit is connected to the passenger compartment heating circuit, the first passenger compartment heating circuit is coupled to the first refrigerant circuit and / or the second refrigerant circuit through a water-cooled condenser 2, the battery coolant circuit is coupled to the second refrigerant circuit through a battery cooler 6, and the electric drive cooling circuit is connected to the first refrigerant circuit and / or the second refrigerant circuit. The liquid circuit is coupled with the first refrigerant circuit and / or the second refrigerant circuit through the water-cooled condenser 2, and the battery pack 19 and the electric drive coolant circuit are coupled with the second refrigerant circuit through the battery cooler 6; the battery coolant circuit and the electric drive coolant circuit can coexist, but the battery coolant circuit and the electric drive coolant circuit do not coexist with the electric drive and battery coolant circuit, and the first passenger compartment heating circuit and the second passenger compartment heating circuit do not coexist; the first refrigerant circuit and the second refrigerant circuit share the refrigerant channel of the water-cooled condenser 2, and the electric drive coolant circuit and the passenger compartment heating circuit share the coolant channel of the water-cooled condenser 2.

[0077] The formation of the above-mentioned battery heating circuit, the first passenger compartment heating circuit, the second passenger compartment heating circuit, the battery coolant circuit, the electric drive coolant circuit, the electric drive and battery coolant circuit requires the use of a multi-way valve 14 with specific multiple interfaces, a multi-inlet and one-outlet valve 11 with multiple inlets and one outlet, and a multi-way proportional valve 10 with one inlet and multiple outlets.

[0078] Specifically, if Figure 1 The multi-way valve 14 has ten ports, from port A to port J; the multi-inlet and one-outlet valve 11 has four valve ports, from port K to port N, with port N being the outlet; and the multi-way proportional valve 10 has three valve ports, from port O to port Q. In this embodiment, the multi-way valve 14 can be designed with more ports as needed. The multi-way valve 14 can utilize related products already disclosed in the prior art.

[0079] To form the battery heating circuit described above, the valve port P of the multi-way proportional valve 10 and the valve port L of the multi-inlet-one-outlet valve 11 need to be connected between the water inlet and outlet of the battery pack 19. If the valve ports P of the multi-way proportional valve 10 and L of the multi-inlet-one-outlet valve 11 are closed, heating of the battery pack 19 cannot be achieved.

[0080] The first passenger compartment heating circuit mentioned above includes: a heating water pump 15, a coolant channel of the water-cooled condenser 2, a heater core 9, valve ports O and Q of a multi-way proportional valve 10, and valve ports M and N of a multi-inlet-one-outlet valve 11; the valve port N of the multi-inlet-one-outlet valve 11 is connected to the water inlet of the heating water pump 15, the coolant channel of the water-cooled condenser 2 is connected between the water outlet of the heating water pump 15 and the water inlet of the heater core 9, and the water outlet of the heater core 9 is connected to the valve port O of the multi-way proportional valve 10. The valve port O and valve port Q of the multi-way proportional valve 10 are connected, the valve port Q of the multi-way proportional valve 10 is connected to the valve port M of the multi-inlet and one-outlet valve 11, and the valve port M and valve port N of the multi-inlet and one-outlet valve 11 are connected; the second passenger compartment heating circuit includes the first passenger compartment heating circuit and the water-heating electric heater 8, wherein the coolant channel of the water-cooled condenser 2 is connected between the water outlet of the heating water pump 15 and the water inlet of the water-heating electric heater 8, and the water inlet of the water-heating electric heater 8 is connected to the water inlet of the warm air core 9.

[0081] By controlling the valve ports of the multi-inlet-one-outlet valve 11 and the multi-way proportional valve 10 , the first passenger compartment heating circuit and the battery heating circuit are connected or disconnected.

[0082] In this embodiment, the electric drive and battery coolant circuit includes: a battery pack 19, a battery water pump 17, a coolant channel of the battery cooler 6, interfaces C to H and J of the multi-way valve 14, a check valve 18, an electric drive water pump 12, and an electric drive 13; the water outlet of the battery pack 19 is connected to the interface D of the multi-way valve 14, the interface D and the interface E of the multi-way valve 14 are connected in sequence, the interface E and the interface C of the multi-way valve 14 are connected, the water inlet of the electric drive water pump 12 is connected to the interface C of the multi-way valve 14, and the electric drive water pump 12 is connected. The water outlet is connected to the water inlet of the electric drive 13, the water outlet of the electric drive 13 is connected to the interface J of the multi-way valve 14, the interface J of the multi-way valve 14 is connected to the interface H, the interface H of the multi-way valve 14 is connected to the water inlet of the battery water pump 17, the coolant channel of the battery cooler 6 is connected to the water outlet of the battery water pump 17 and the interface G of the multi-way valve 14, the interface G of the multi-way valve 14 is connected to the interface F, the interface F of the multi-way valve 14 is connected to the water inlet of the check valve 18, and the water inlet of the check valve 18 is connected to the water inlet of the battery pack 19.

[0083] The electric drive coolant circuit includes:

[0084] The electric water pump 12, the electric drive 13, the valve ports L and O of the multi-inlet and outlet valve 11, the heating water pump 15, the coolant channel of the water-cooled condenser 2, the interfaces A to C and I of the multi-way valve 14, and the radiator 20; the water inlet of the electric water pump 12 is connected to the interface C of the multi-way valve 14, the water outlet of the electric water pump 12 is connected to the water inlet of the electric drive 13, the water outlet of the electric drive 13 is connected to the valve port K of the multi-inlet and outlet valve 11, the valve port N of the multi-inlet and outlet valve 11 is connected to the water inlet of the heating water pump 15, the coolant channel of the water-cooled condenser 2 is connected between the water outlet of the heating water pump 15 and the interface I of the multi-way valve 14, the interface I of the multi-way valve 14 is connected to the interface A, the interface A is connected to the water inlet of the radiator 20, the water outlet of the radiator 20 is connected to the interface B of the multi-way valve 14, and the interface B of the multi-way valve 14 is connected to the interface C.

[0085] Among them, for the electric drive 13, it can also provide the required cooling medium by designing a water bottle 16.

[0086] The battery coolant circuit includes: the battery pack 19, the battery water pump 17, the coolant channel of the battery cooler 6, the ports D to H of the multi-way valve 14, and the check valve 18;

[0087] The water outlet of the battery pack 19 is connected to the interface D of the multi-way valve 14, the interface D and the interface E of the multi-way valve 14 are connected in sequence, the interface E of the multi-way valve 14 is connected to the interface H, the interface H of the multi-way valve 14 is connected to the water inlet of the battery water pump 17, the coolant channel of the battery cooler 6 is connected to the water outlet of the battery water pump 17 and the interface G of the multi-way valve 14, the interface G of the multi-way valve 14 is connected to the interface F, the interface F of the multi-way valve 14 is connected to the water inlet of the check valve 18, and the water inlet of the check valve 18 is connected to the water inlet of the battery pack 19.

[0088] Among them, the above-mentioned electric drive and battery coolant circuit cannot coexist with the electric drive coolant circuit and the battery coolant circuit, but the battery coolant circuit and the electric drive coolant circuit can coexist.

[0089] To form the above-mentioned electric drive and battery coolant circuit, it is necessary to: start the electric drive water pump 12 and the battery water pump 17, connect the interface I and the interface K of the multi-way valve 14, connect the interface E and the interface C of the multi-way valve 14, and connect the interface G and the interface H of the multi-way valve 14; and close the valve ports L and K of the multi-inlet and one-outlet valve 11.

[0090] To form the above-mentioned electric drive coolant circuit, it is necessary to: open the valve port L of the multi-inlet and one-outlet valve 11, start the heating water pump 15, connect the interface I and interface A of the multi-way valve 14, and connect the interfaces B and C of the multi-way valve 14.

[0091] To form the above-mentioned battery coolant circuit, it is necessary to: start the battery water pump 17, connect the ports H and E of the multi-way valve 14, connect the ports G and F of the multi-way valve 14, and close the valve port L of the multi-inlet and one-outlet valve 11.

[0092] Thus, by controlling the multi-way valve 14 , the multi-inlet and one-outlet valve 11 , the heating water pump 15 and the electric drive water pump 12 , the above three circuits are formed.

[0093] In addition, in this embodiment, the first refrigerant circuit includes: a compressor 1, a refrigerant channel of a water-cooled condenser 2, a first electronic expansion valve 3, an evaporator core 4 and a gas-liquid separator 7 that are connected in sequence to form a closed loop; the second refrigerant circuit includes: a compressor 1, a refrigerant channel of a water-cooled condenser 2, a second electronic expansion valve 5, a refrigerant channel of a battery cooler 6 and a gas-liquid separator 7 that are connected in sequence to form a closed loop.

[0094] When forming the first refrigerant circuit, the compressor 1 and the first electronic expansion valve 3 need to be turned on; when forming the second refrigerant circuit, the compressor 1 and the second electronic expansion valve 5 need to be turned on. The first refrigerant circuit and the second refrigerant circuit can exist at the same time as needed.

[0095] Therefore, the above-mentioned heat pump system in this embodiment forms the required above-mentioned circuits by controlling the opening and closing of the battery water pump 17, the electric water pump 12, the heating water pump 15, the first electronic expansion valve 3 and the second electronic expansion valve 5, the compressor 1 and the water heating electric heater 8, as well as the valve port control of the multi-way valve 14, the multi-way proportional valve 10 and the multi-inlet and one-outlet valve 11.

[0096] On the basis of the above-mentioned automobile heat pump system, in order to realize the utilization of the heat capacity effect of the battery pack 19, this embodiment can:

[0097] When the user demand is the first preset level and the ambient temperature is within the preset temperature range (the electric drive waste heat is not required at this time), actions A, B1, and C are executed; action A is to conduct the electric drive and battery coolant circuit, action B1 is to conduct the first passenger compartment heating circuit, and action C is to conduct the first refrigerant circuit;

[0098] When the user demand is the second preset level of heating demand and the ambient temperature is within the preset temperature range (at this time, electric drive waste heat is required), actions A, B1, C, and D are performed. Action D is to conduct the second refrigerant circuit.

[0099] When the user demand is for passenger compartment cooling, determining whether the vehicle's allowable power is greater than or equal to the cooling request power;

[0100] When the vehicle's allowable power is greater than or equal to the cooling request power, actions C and E are executed. Action E is to turn on the electric drive coolant circuit.

[0101] During the execution of actions C and E, if the battery pack 19 has cooling and cold storage requirements, actions D and F are executed. Action F is to open the battery coolant circuit.

[0102] When the user demand is the third preset level of heating demand and the ambient temperature is within the preset temperature range (at this time, electric drive waste heat is not required), action B2 and action A are executed; action B2 is to conduct the second passenger compartment heating circuit;

[0103] The demand temperature of the third preset level of heating demand is higher than the demand temperature of the first preset level of heating demand.

[0104] Combine Figure 2 From this perspective, when the user requires passenger compartment heating, there are several ways to achieve passenger compartment heating. The first is to heat the coolant using the water-heating electric heater 8 (i.e., the passenger compartment heating requirement is the third preset level); the second is to heat the coolant using heat exchange between the refrigerant and the coolant at the water-cooled condenser 2 (i.e., the passenger compartment heating requirement is the first preset level); and the third is to heat the coolant using heat exchange between the refrigerant, the waste heat from the electric drive 13, and the stored heat from the battery pack 19 at the water-cooled condenser 2 (i.e., the passenger compartment heating requirement is the second preset level). In actual operation, the specific method used will depend on the user's heating requirements.

[0105] Specifically, in this embodiment, when the user's heating demand reaches the first preset level, the second method is used to heat the passenger compartment; when the user's heating demand reaches the second preset level, the third method is used to heat the passenger compartment; and when the user's heating demand reaches the third preset level, the first method is used to heat the passenger compartment. Each preset level of heating demand corresponds to a specific heating temperature range.

[0106] Combine Figure 2 In this embodiment, when the user's heating demand reaches the first preset level, actions A, B1, and C are executed. The specific control steps for executing actions A, B1, and C are as follows: starting the heating water pump 15, the electric drive water pump 12, the battery water pump 17, the first electronic expansion valve 3, and the compressor 1; connecting ports H and J, C and E, D and E, and G and F of the multi-way valve 14; connecting ports M and N of the multi-inlet and one-outlet valve 11; and connecting ports O and Q of the multi-way proportional valve 10. This creates the required first passenger compartment heating circuit, the electric drive and battery coolant circuit, and the first refrigerant circuit.

[0107] Since the second electronic expansion valve 5 is not opened, the battery cooler 6 at this time only serves as a coolant passage and cannot perform heat exchange.

[0108] At this point, compressor 1 draws in low-pressure, low-temperature gaseous refrigerant from gas-liquid separator 7 and discharges high-temperature, high-pressure gaseous refrigerant. After exchanging heat with the heating medium through water-cooled condenser 2, the refrigerant changes from a high-pressure, high-temperature gas to a high-pressure, medium-temperature liquid. The high-pressure, medium-temperature liquid then passes through first electronic expansion valve 3, throttling the refrigerant, turning it from a high-pressure, medium-temperature liquid to a low-pressure, low-temperature gas. The refrigerant then passes through evaporator core 4, absorbing heat from the medium in the passenger compartment, and enters gas-liquid separator 7, achieving dehumidification of the passenger compartment. Simultaneously, heating water pump 15 pushes the heating liquid, heated by water-cooled condenser 2, through multi-way proportional valve 10, out of valve port O and into valve port Q. It then flows through multi-inlet and one-outlet valve 11, into valve port M, out through valve port N, and back to heating water pump 15, forming a heat pump heating circuit and achieving heating and dehumidification of the passenger compartment. At the same time, the waste heat of the electric drive 13 is carried out through the coolant, flows through the ports J and H of the multi-way valve 14, and then passes through the coolant channel of the battery water pump 17 and the battery cooler 6, and then flows through the ports G and F of the multi-way valve 14 and passes through the check valve 18 to reach the battery pack 19. The heat capacity effect of the battery pack 19 is utilized (because the battery pack 19 is large in size and has its own heat exchange plate, the heat exchange plate can be used to realize heat conduction between the waste heat of the electric drive 13 and the battery pack 19, and the battery pack 19 has a high density and can serve as a relatively ideal heat capacitor) to realize heat storage of the waste heat of the electric drive 13.

[0109] Combine Figure 2 In this embodiment, when the user's heating demand reaches the second preset level, actions A, B1, C, and D are executed. The specific control steps for executing actions A, B1, C, and D are as follows: controlling the heating water pump 15, electric drive water pump 12, battery water pump 17, first electronic expansion valve 3, second electronic expansion valve 5, and compressor 1 to start; controlling the connections between ports H and J, C and E, D and E, and F and G of the multi-way valve 14; controlling the connections between ports M and N of the multi-inlet and one-outlet valve 11; and controlling the connections between ports O and P of the multi-way proportional valve 10. This creates the required first passenger compartment heating circuit, the electric drive and battery coolant circuit, the first refrigerant circuit, and the second refrigerant circuit.

[0110] At this time, the compressor 1 inhales low-pressure and low-temperature gaseous refrigerant from the gas-liquid separator 7 and discharges high-temperature and high-pressure gaseous refrigerant. After heat exchange with the heating medium through the water-cooled condenser 2, the refrigerant changes from high-pressure and high-temperature gas to high-pressure medium-temperature liquid. A part of the high-pressure medium-temperature liquid passes through the first electronic expansion valve 3 to throttle the refrigerant, so that the refrigerant changes from high-pressure medium-temperature liquid to low-pressure and low-temperature gas, and then passes through the evaporator core 4 to absorb heat from the medium in the passenger compartment and enter the gas-liquid separator 7 to achieve dehumidification of the passenger compartment; the other part of the high-pressure medium-temperature liquid passes through the second electronic expansion valve 5 to throttle the refrigerant. The refrigerant changes from a high-pressure, medium-temperature liquid to a low-pressure, low-temperature gas. The low-pressure, low-temperature gaseous refrigerant absorbs the waste heat of the electric drive 13 and the heat stored in the battery pack 19 at the battery cooler 6 and becomes a low-pressure, medium-temperature gaseous refrigerant. The refrigerant then passes through the gas-liquid separator 7 for gas-liquid separation and returns to the compressor 1. For the compressor 1, since the refrigerant introduced at this time is a low-pressure, medium-temperature gas, the temperature of the high-temperature, high-pressure gas compressed by the compressor 1 will be higher, and more heat will be exchanged to the coolant at the water-cooled condenser 2, thereby recycling the waste heat of the electric drive 13 and the heat stored in the battery pack 19. At this time, the heating water pump 15 pushes the heating liquid heated by the water-cooled condenser 2 through the multi-way proportional valve 10, flows from valve port O to valve port Q, then flows through the multi-inlet and one-outlet valve 11, enters valve port M, flows through valve port N, and flows back to the heating water pump 15, forming a heat pump heating circuit, achieving heating and dehumidification of the passenger compartment. At the same time, for the battery pack 19 at this time, since its stored heat is absorbed by the battery cooler 6, the temperature of the coolant is reduced. At this time, the battery pack 19 starts to store cold, and this part of the stored cold can be used to cool the battery pack 19 whose temperature rises rapidly due to fast charging of the battery pack 19.

[0111] Recombination Figure 2 In this embodiment, when the user's heating demand reaches the third preset level, action B2 or actions A and B2 are executed. The specific control steps for executing action B2 include: activating the heating water pump 15 and the water heater 8, controlling the flow of valve ports M and N of the multi-inlet-one-outlet valve 11, and controlling the flow of valve ports O and Q of the multi-way proportional valve 10. This creates a second passenger compartment heating circuit.

[0112] At this point, the heating water pump 15 pushes the heating liquid to be heated by the water heater 8. The heated heating liquid then passes through the heater core 9 to heat the passenger compartment. Simultaneously, the battery pack 19 can selectively activate the electric drive water pump 12 and the battery water pump 17 based on whether the electric drive 13 has excess heat that needs to be recovered, thereby forming the aforementioned electric drive and battery coolant circuit.

[0113] go through Figure 2As an example, the waste heat of the electric drive 13 can be recovered by utilizing the thermal capacity effect of the battery pack 19. When there is a demand for waste heat utilization, the heat stored in the battery pack 19 can be transferred to the water-cooled condenser 2 through the refrigerant to heat the coolant, and finally used to heat the passenger compartment.

[0114] Of course, in this embodiment, if there is only a scenario where the electric drive 13 has excessive waste heat that needs to be recovered, then only the above-mentioned electric drive and battery coolant circuits can be formed. However, once it is necessary to recycle the waste heat of the electric drive 13 and the heat stored in the battery pack 19, the second refrigerant circuit and the first refrigerant circuit must be formed at the same time, because the heat absorbed by the refrigerant in the battery cooler 6 must find an outlet (in this embodiment, the evaporator core 4, which can be used for passenger compartment dehumidification). Otherwise, the refrigerant circuit will continue to absorb heat without releasing heat to the outside, and there is a problem that the refrigerant circuit cannot withstand the excessive heat absorption and the circuit will be damaged.

[0115] In addition, in this embodiment, it is also possible to Figure 3 A battery heating circuit is formed to heat the battery pack 19. This circuit must be developed in parallel with the passenger compartment heating circuit. When the battery pack 19 requires heating, actions B1, C, and G are executed; action G activates the battery heating circuit. Activating the battery heating circuit involves connecting ports O and P of the multi-way proportional valve 10 and ports L and N of the multi-input / one-output valve 11. The principles for establishing the passenger compartment heating circuit and the first refrigerant circuit are consistent with those described above and are not detailed here.

[0116] like Figure 4As shown, in this embodiment, the above-mentioned automotive heat pump system can also be used for cooling. The passenger compartment cooling requires the use of waste heat from the electric drive 13. Specifically, when the user demand is for passenger compartment cooling, it is determined whether the vehicle's allowable power is greater than or equal to the cooling request power; when the vehicle's allowable power is greater than or equal to the cooling request power, actions C and E are executed, with action E being to open the electric drive coolant circuit; during the execution of actions C and E, if the battery pack 19 has cooling and cold storage requirements, actions D and F are executed, with action F being to open the battery coolant circuit. The specific steps for executing actions C and E are: controlling the compressor 1, the first electronic expansion valve 3, and the electric drive water pump 12 to start, controlling the valve ports K and N of the multi-inlet and one-outlet valve 11 to be open, controlling the ports I and A of the multi-way valve 14 to be open, and controlling the ports B and C to be open. The specific control steps for executing actions D and F are as follows: controlling the activation of the second electronic expansion valve 5 and the battery water pump 17, controlling the opening of valve ports H and E of the multi-way valve 14, valve ports F and G, and valve ports D and E. Compressor 11 draws low-pressure, low-temperature gaseous refrigerant from gas-liquid separator 77 and discharges high-temperature, high-pressure gaseous refrigerant. After heat exchange with the coolant in the electric drive coolant circuit through the water-cooled condenser 2, the refrigerant changes from a high-pressure, high-temperature gas to a high-pressure, medium-temperature liquid. The refrigerant then passes through the first electronic expansion valve 3, throttling the refrigerant through the evaporator core 4 to cool the passenger compartment, and through the second electronic expansion valve 5, throttling the refrigerant through the battery cooler 6 and the battery pack 19 cooling circuit to cool the battery pack 19. The refrigerant then flows from the evaporator core 4 and battery cooler 6, respectively, into the gas-liquid separator 7, and is then drawn into compressor 1 to begin the cycle.

[0117] The cooling medium in the battery coolant circuit is pumped out by the battery water pump 17, cooled by the battery cooler 6, and then flows out from port G to port F. It then returns to the multi-way valve 14 through the check valve 18 and the battery pack 19, and then returns to the battery water pump 17 through ports D and E. As a result, while the battery pack 19 is being cooled, the excess cold generated by the refrigerant is stored. This stored cold can be used to cool the battery pack 19 when it experiences a significant temperature rise during rapid charging, thereby increasing energy utilization.

[0118] In this embodiment, the description of the related circuits that mainly consider the use of the battery pack 19 as a thermal capacitor is considered. Of course, in this embodiment, a circuit that does not require the participation of the battery pack 19 can also be formed. For example, in a scenario where the passenger compartment does not need to be heated but the electric drive 13 needs to dissipate heat, such as Figure 5As shown, a heat dissipation circuit for the electric drive 13 is formed, consisting of the electric water pump 12, the electric drive 13, port J and port A of the multi-way valve 14, the radiator 20, and ports B and C of the multi-way valve 14. In this case, the electric drive 13 dissipates heat through the radiator 20. For another example, in a scenario where the passenger compartment does not require heating but both the electric drive 13 and the battery require heat dissipation, a circuit can be formed in which the radiator 20 dissipates heat for the electric drive 13 and the battery. In this case, it is only necessary to connect valve ports B and F of the multi-way valve 14, valve ports J and A, and valve ports D and C.

[0119] In this embodiment, the use of the above-mentioned automobile heat pump system is not limited to the circuits and application scenarios involved in this embodiment.

[0120] Reference Figure 6 The embodiment of the present invention further provides a heat pump system control method, which is applied to the above-mentioned automobile heat pump system, and the method includes:

[0121] Step S101: Obtain user needs.

[0122] User needs come from user input commands. Users can input their desired commands through voice, vehicle display, vehicle physical hard keys, etc.

[0123] Step S102: When the user demand is a first preset level heating demand and the ambient temperature is within a preset temperature range, actions A, B1 and C are executed.

[0124] Ambient temperature refers to the real-time temperature outside the vehicle, collected by a temperature sensor. The preset temperature range refers to the predetermined range of ambient temperatures where passenger compartment heating is most likely required, for example, a temperature range below 10°C.

[0125] Step S103 : When the user demand is the second preset level heating demand and the ambient temperature is within the preset temperature range, actions A, B1, C and D are executed.

[0126] Step S104 : When the user demand is a cooling demand, it is determined whether the vehicle allowable power is greater than or equal to the cooling request power.

[0127] Here, the vehicle's allowed power and cooling request power are both directly collected power values.

[0128] Step S105 , when the vehicle allowable power is greater than or equal to the cooling request power, actions C and E are executed, and action E is to turn on the electric drive coolant circuit.

[0129] In step S106 , during the execution of actions C and E, if the battery pack 19 has cooling and cold storage requirements, actions D and F are executed. Action F is to open the battery coolant circuit.

[0130] Step S107: During the execution of actions A, B1, and C or actions A, B1, C, and D, if the user demand changes to the third preset level of heating demand, then stop executing actions A, B1, and C or stop executing actions A, B1, C, and D, and execute action B2;

[0131] Action B2 is to conduct the second passenger compartment heating circuit;

[0132] The demand temperature of the third preset level heating demand is higher than the demand temperature of the first preset level heating demand and the second preset level heating demand.

[0133] Step S107: when the user demand is the third preset level demand and the ambient temperature is within the preset temperature range, perform action B2 or perform actions A and B2;

[0134] Action B2 is to conduct the second passenger compartment heating circuit

[0135] Step S108 , when the battery pack 19 has a heating requirement, execute actions B1 , C, and G or execute actions B2 and G;

[0136] Action B2 is to conduct the second passenger compartment heating circuit;

[0137] Action G is to turn on the battery heating circuit.

[0138] The control method of the present invention has the same technical effects as the heat pump system. That is, the battery pack 19 is used as a heat capacitor. When the residual heat of the electric drive 13 is not needed for passenger cabin heating, the residual heat of the electric drive 13 is stored by utilizing the thermal capacity effect of the battery pack 19. When the residual heat of the electric drive 13 is needed for passenger cabin heating, the residual heat stored in the battery pack 19 and the residual heat of the electric drive 13 are exchanged with the refrigerant through heat exchange, and then exchanged with the coolant in the passenger cabin heating circuit to realize the utilization of the residual heat of the electric drive 13 for passenger cabin heating. While the residual heat of the electric drive 13 is utilized for passenger cabin heating, the battery pack 19 can also simultaneously store cold. In addition, when cooling the battery pack 19, the battery pack 19 can use the refrigerant to cool it and store cold at the same time. This stored cold capacity can be used to cool the battery pack 19 when the battery pack 19 is fast charged.

[0139] An embodiment of the present invention further provides a vehicle comprising the above-mentioned vehicle heat pump system.

[0140] Although explained in detail with reference to a limited number of embodiments, the present invention is not limited to the applications set forth in the specification and embodiments, but is fully applicable to a wide variety of fields suitable for the present invention. Further modifications, additions, and substitutions will readily occur to those skilled in the art, and the present invention should not be construed as being limited by the foregoing description without departing from the general concept defined by the claims and their equivalents.

Claims

1. A thermal management method for an automobile heat pump system, characterized in that: include: When it is determined that the passenger compartment has a first preset level of heating demand but does not require electric drive waste heat, the battery pack's thermal capacity effect is used to store the electric drive waste heat, and refrigerant is used to heat the passenger compartment; When it is determined that the passenger compartment has a second preset level of heating demand and that electric drive waste heat is required, the electric drive waste heat stored in the battery pack and the waste heat currently generated by the electric drive are transferred to the refrigerant, thereby using the refrigerant to heat the passenger compartment; The second preset level heating demand is higher than the first preset level heating demand; The method further comprises: When it is determined that the passenger compartment needs cooling, the excess cooling capacity of the refrigerant is stored by utilizing the thermal capacity effect of the battery pack, and the refrigerant is then used to cool the passenger compartment; When it is determined that the passenger compartment has a cooling demand, the steps of utilizing the thermal capacity effect of the battery pack to store excess cooling capacity of the refrigerant and utilizing the refrigerant to cool the passenger compartment include: Forming an electric drive cooling circuit, a first refrigerant circuit, a second refrigerant circuit, and a battery cooling circuit; The first refrigerant circuit and the second refrigerant circuit are connected, the second refrigerant circuit and the battery cooling circuit are thermally coupled, and the first refrigerant circuit and the electric drive coolant circuit are thermally coupled; The heat generated by the first refrigerant circuit itself is heat-exchanged to the electric drive coolant circuit for cooling. Part of the cooled refrigerant is used to cool the passenger compartment, and the heat exchanged to the electric drive coolant circuit is dissipated by the electric drive coolant circuit; another part of the cooled refrigerant is transferred to the second refrigerant circuit, and then exchanged to the battery cooling circuit through the second refrigerant circuit, so that the battery pack can store excess cold.

2. The automotive heat pump system thermal management method according to claim 1, characterized in that: The method further comprises: When it is determined that the battery pack has a heating demand, the refrigerant is used to heat the battery pack.

3. The automotive heat pump system thermal management method according to claim 1, characterized in that: The method further comprises: When it is determined that the passenger compartment has a third preset level of heating demand but does not require electric drive waste heat, the battery pack's thermal capacity effect is used to store the electric drive waste heat, and the heater is used to heat the passenger compartment; The third preset level heating demand is higher than the first preset level heating demand and the second preset level heating demand.

4. The automotive heat pump system thermal management method according to claim 1, characterized in that: When it is determined that the passenger compartment has a first preset level of heating demand but does not require electric drive waste heat, the steps of storing the electric drive waste heat by utilizing the thermal capacity effect of the battery pack and heating the passenger compartment by utilizing a refrigerant include: forming a first passenger compartment heating circuit, an electric drive and battery coolant circuit, and a first refrigerant circuit; The first refrigerant circuit is thermally coupled to the first passenger compartment heating circuit. The first refrigerant circuit exchanges the heat generated by itself to the first passenger compartment heating circuit to heat the passenger compartment; the waste heat of the electric drive is transferred to the battery pack via the electric drive and battery coolant circuit for storage.

5. The automotive heat pump system thermal management method according to claim 1, characterized in that: When it is determined that the passenger compartment has a second preset level of heating demand and electric drive waste heat is required, the electric drive waste heat stored in the battery pack and the waste heat currently generated by the electric drive are transferred to the refrigerant, and then the refrigerant is used to heat the passenger compartment, including: forming a first passenger compartment heating circuit, an electric drive and battery coolant circuit, a first refrigerant circuit, and a second refrigerant circuit; The first refrigerant circuit is thermally coupled to the first passenger compartment heating circuit, the electric drive and battery coolant circuit is thermally coupled to the second refrigerant circuit, and the first refrigerant circuit and the second refrigerant circuit are in communication; The waste heat stored in the battery pack and the waste heat currently generated by the electric drive undergo heat exchange through the electric drive and battery coolant circuit and the second refrigerant circuit, and then is transferred from the second refrigerant circuit to the first refrigerant circuit. The first refrigerant circuit exchanges the heat generated by itself and the heat it absorbs to the first passenger compartment heating circuit to heat the passenger compartment.

6. The automotive heat pump system thermal management method according to claim 2, characterized in that: When it is determined that the battery pack has a heating requirement, the steps for heating the battery pack using a refrigerant include: forming a battery heating circuit, a first passenger compartment heating circuit, and a first refrigerant circuit; The first passenger compartment heating circuit is connected to the battery heating circuit, and the first passenger compartment heating circuit is thermally coupled to the first refrigerant circuit; the first refrigerant circuit exchanges the heat generated by itself to the first passenger compartment heating circuit, and then transfers it to the battery heating circuit to heat the battery.

7. The automotive heat pump system thermal management method according to claim 3, characterized in that: When it is determined that the passenger compartment has a third preset level of heating demand but does not require electric drive waste heat, the steps of storing the electric drive waste heat by utilizing the thermal capacity effect of the battery pack and heating the passenger compartment by utilizing the heater include: A second passenger compartment heating circuit and an electric drive and battery coolant circuit are formed; the second passenger compartment heating circuit uses the heat generated by itself to heat the passenger compartment; the waste heat of the electric drive is transferred to the battery pack for storage via the electric drive and battery coolant circuit.

8. An automotive heat pump system implementing the automotive heat pump system thermal management method according to any one of claims 1 to 7, characterized in that: The automobile heat pump system comprises: a first passenger compartment heating circuit, a second passenger compartment heating circuit, a battery coolant circuit, an electric drive coolant circuit, an electric drive and battery coolant circuit, a first refrigerant circuit, and a second refrigerant circuit; The first passenger compartment heating circuit is coupled to the first refrigerant circuit and / or the second refrigerant circuit via a water-cooled condenser (2), the battery coolant circuit is coupled to the second refrigerant circuit via a battery cooler, the electric drive coolant circuit is coupled to the first refrigerant circuit and / or the second refrigerant circuit via a water-cooled condenser (2), and the electric drive and battery coolant circuits are coupled to the second refrigerant circuit via a battery cooler; The battery coolant circuit and the electric drive coolant circuit can coexist, but the battery coolant circuit and the electric drive coolant circuit do not coexist with the electric drive and battery coolant circuit; the first refrigerant circuit and the second refrigerant circuit share the refrigerant channel of the water-cooled condenser (2), the electric drive coolant circuit and the passenger compartment heating circuit share the coolant channel of the water-cooled condenser (2), and the first passenger compartment heating circuit and the second passenger compartment heating circuit do not coexist.

9. The automotive heat pump system according to claim 8, characterized in that: The automobile heat pump system further comprises: The battery heating circuit is connected to the first passenger compartment heating circuit or the second passenger compartment heating circuit.

10. The automotive heat pump system according to claim 9, characterized in that: The automobile heat pump system comprises: Multi-way valve (14), multi-inlet and one-outlet valve (11), multi-way proportional valve (10); The formation of the first passenger compartment heating circuit, the second passenger compartment heating circuit, the battery heating circuit, the battery coolant circuit, the electric drive coolant circuit and the electric drive and battery coolant circuit relies on the switching control of multiple internal interfaces of the multi-way valve (14), the switching control of multiple internal valve ports of the multi-inlet and one-outlet valve (11), the switching control of multiple outlets of the multi-way proportional valve (10), and the opening and closing control of the electric drive water pump (12), the heating water pump (15) and the battery water pump (17).

11. The automotive heat pump system according to claim 10, characterized in that: The multi-way valve (14) has 10 interfaces, from interface A to interface J; the multi-inlet and one-outlet valve (11) has 4 valve ports, from valve port K to valve port N, where valve port N is the water outlet; the multi-way proportional valve (10) has 3 valve ports, from valve port O to valve port Q; The battery coolant circuit includes: a battery pack (19), a battery water pump (17), a coolant channel of a battery cooler (6), interfaces D to H of a multi-way valve (14), and a check valve (18); The water outlet of the battery pack (19) is connected to the interface D of the multi-way valve (14), the interface D and the interface E of the multi-way valve (14) are connected in sequence, the interface E of the multi-way valve (14) is connected to the interface H, the interface H of the multi-way valve (14) is connected to the water inlet of the battery water pump (17), the coolant channel of the battery cooler (6) is connected to the water outlet of the battery water pump (17) and the interface G of the multi-way valve (14), the interface G of the multi-way valve (14) is connected to the interface F, the interface F of the multi-way valve (14) is connected to the water inlet of the check valve (18), and the water inlet of the check valve (18) is connected to the water inlet of the battery pack (19).

12. The automotive heat pump system according to claim 11, characterized in that: The electric drive coolant circuit includes: The electric drive water pump (12), the electric drive (13), the valve port L and the valve port O of the multi-inlet and one-outlet valve (11), the heating water pump (15), the coolant channel of the water-cooled condenser (2), the interfaces A to C and I of the multi-way valve (14), and the radiator (20); the water inlet of the electric drive water pump (12) is connected to the interface C of the multi-way valve (14), the water outlet of the electric drive water pump (12) is connected to the water inlet of the electric drive (13), and the water outlet of the electric drive (13) is connected to the multi-inlet and one-outlet valve ( The valve port K of the multi-inlet and one-outlet valve (11) is connected to the water inlet of the heating water pump (15), the valve port N of the multi-inlet and one-outlet valve (11) is connected to the water inlet of the heating water pump (15), the coolant channel of the water-cooled condenser (2) is connected between the water outlet of the heating water pump (15) and the interface I of the multi-way valve (14), the interface I of the multi-way valve (14) is connected to the interface A, the interface A is connected to the water inlet of the radiator (20), the water outlet of the radiator (20) is connected to the interface B of the multi-way valve (14), and the interface B of the multi-way valve (14) is connected to the interface C.

13. The automotive heat pump system according to claim 11, characterized in that: The electric drive and battery coolant circuit includes: The battery pack (19), the battery water pump (17), the coolant channel of the battery cooler (6), the interface C to the interface H and the interface J of the multi-way valve (14), the check valve (18), the electric drive water pump (12), and the electric drive (13); the water outlet of the battery pack (19) is connected to the interface D of the multi-way valve (14), the interface D and the interface E of the multi-way valve (14) are connected in sequence, the interface E and the interface C of the multi-way valve (14) are connected, the water inlet of the electric drive water pump (12) is connected to the interface C of the multi-way valve (14), and the water outlet of the electric drive water pump (12) is connected to the electric drive (13). The water inlet of the battery cooler (3) is connected to the water outlet of the electric drive (13), the water outlet of the electric drive (13) is connected to the interface J of the multi-way valve (14), the interface J of the multi-way valve (14) is connected to the interface H, the interface H of the multi-way valve (14) is connected to the water inlet of the battery water pump (17), the coolant channel of the battery cooler (6) is connected to the water outlet of the battery water pump (17) and the interface G of the multi-way valve (14), the interface G of the multi-way valve (14) is connected to the interface F, the interface F of the multi-way valve (14) is connected to the water inlet of the check valve (18), and the water inlet of the check valve (18) is connected to the water inlet of the battery pack (19).

14. The automotive heat pump system according to claim 11, characterized in that: The first passenger compartment heating circuit includes: The heating water pump (15), the cooling liquid channel of the water-cooled condenser (2), the warm air core (9), the valve port O and the valve port Q of the multi-way proportional valve (10), and the valve ports M and N of the multi-inlet and outlet valve (11); the valve port N of the multi-inlet and outlet valve (11) is connected to the water inlet of the heating water pump (15), the cooling liquid channel of the water-cooled condenser (2) is connected between the water outlet of the heating water pump (15) and the water inlet of the warm air core (9), the water outlet of the warm air core (9) is connected to the valve port O of the multi-way proportional valve (10), the valve port O of the multi-way proportional valve (10) is connected to the valve port Q, the valve port Q of the multi-way proportional valve (10) is connected to the valve port M of the multi-inlet and outlet valve (11), and the valve port M of the multi-inlet and outlet valve (11) is connected to the valve port N; The second passenger compartment heating circuit includes the first passenger compartment heating circuit and a water-heating electric heater (8), wherein the coolant channel of the water-cooled condenser (2) is connected between the water outlet of the heating water pump (15) and the water inlet of the water-heating electric heater (8), and the water outlet of the water-heating electric heater (8) is connected to the water inlet of the warm air core (9).

15. The automotive heat pump system according to claim 14, characterized in that: Battery heating circuit: valve ports O and P of the multi-way proportional valve (10), valve ports L and N of the multi-inlet and one-outlet valve (11), and the battery pack (19); The valve port N of the multi-inlet and one-outlet valve (11) is connected to the water inlet of the heating water pump (15), the water outlet of the warm air core (9) is connected to the valve port O of the multi-way proportional valve (10), the valve port O of the multi-way proportional valve (10) is connected to the valve port P, the valve port P of the multi-way proportional valve (10) is connected to the water inlet of the battery pack (19), the water outlet of the battery pack (19) is connected to the valve port L of the multi-inlet and one-outlet valve (11), and the valve port L of the multi-inlet and one-outlet valve (11) is connected to the valve port N.

16. The automotive heat pump system according to claim 10, characterized in that: The first refrigerant circuit includes: The compressor (1), the refrigerant channel of the water-cooled condenser (2), the first electronic expansion valve (3), the evaporator core (4) and the gas-liquid separator (7) are sequentially connected to form a closed loop; The second refrigerant circuit includes: The compressor (1), the refrigerant channel of the water-cooled condenser (2), the second electronic expansion valve (5), the refrigerant channel of the battery cooler (6), and the gas-liquid separator (7) are sequentially connected to form a closed loop.

17. An automobile, characterized in that: The automobile heat pump system comprises the automobile heat pump system according to any one of claims 8 to 16.

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