Thermal management system and vehicle

Abstract

The invention relates to a heat management system and a vehicle, the heat management system comprises an air conditioner loop, a multi-way valve and a heat mixing module connected between the multi-way valve and the air conditioner loop, and the heat mixing module and the multi-way valve are jointly configured to selectively enable a heat exchange medium in the air conditioner loop to independently circulate, or at least part of the heat exchange medium flows out of the air conditioner loop. According to the heat management system, by controlling the multi-way valve and the mixed heat module, independent circulation of the heat exchange medium in the air conditioner loop can be achieved, direct refrigeration and heating of the heat pump system are achieved, and the heat pump system directly acts on a passenger compartment; and part or all of the heat exchange media in the air conditioner loop can flow into other heat exchange loops, indirect refrigeration and heating of the heat pump system are achieved, heat utilization and distribution are achieved, and the requirements of different scenes are met.

Description

Technical Field

[0001] The present disclosure relates to the technical field of thermal management, and particularly to a thermal management system and a vehicle. Background Art

[0002] With the popularization of new energy vehicles, especially in the usage scenarios of pure electric vehicles, the battery capacity, charging rate, and electric drive power of vehicles have developed rapidly. Correspondingly, the demand for thermal management is getting higher and higher, and the requirements for aspects such as heating rate, cooling capacity, and heat exchange efficiency have been greatly improved. In the existing thermal management system, the air-conditioning circuit cannot achieve the coexistence of direct heat pumps and indirect heat pumps, cannot meet various requirements simultaneously, and has a complex structure and low integration, and cannot guarantee the efficiency. Summary of the Invention

[0003] To overcome the problems existing in the related art, the present disclosure provides a thermal management system and a vehicle using the thermal management system.

[0004] According to the first aspect of the embodiments of the present disclosure, a thermal management system is provided, including an air-conditioning circuit, a multi-way valve, and a heat mixing module connected between the multi-way valve and the air-conditioning circuit. The heat mixing module and the multi-way valve are jointly configured to: selectively enable the heat exchange medium in the air-conditioning circuit to circulate alone, or enable at least part of the heat exchange medium to flow out of the air-conditioning circuit.

[0005] Optionally, the thermal management system includes a battery pack circuit. The heat mixing module and the multi-way valve are jointly configured to: selectively enable the heat exchange medium in the air-conditioning circuit to flow into the battery pack circuit so that the temperature difference between the heat exchange media in the air-conditioning circuit and the battery pack circuit is within a first predetermined range.

[0006] Optionally, the thermal management system includes an electric drive circuit. The heat mixing module and the multi-way valve are jointly configured to: selectively enable the heat exchange medium in the air-conditioning circuit to flow into the electric drive circuit so that the temperature difference between the heat exchange media in the air-conditioning circuit and the electric drive circuit is within a second predetermined range.

[0007] Optionally, the thermal management system includes a low-temperature radiator circuit. The multi-way valve and the heat mixing module are jointly configured to: optionally enable the heat exchange medium in the liquid-cooled condenser in the air-conditioning circuit to flow into the low-temperature radiator circuit.

[0008] Optionally, the heat mixing module includes a three-way control valve, a first connection valve, a second connection valve, and a third connection valve connected in sequence through pipelines. The first connection valve, the second connection valve, and the third connection valve are respectively three-way valves. The three-way control valve and the first connection valve are connected to the air-conditioning circuit. The second connection valve is connected to the first interface of the multi-way valve, and the third connection valve is connected to the second interface of the multi-way valve.

[0009] Optionally, when port Ⅰ of the three-way control valve is connected to port Ⅲ and port Ⅱ is blocked, the air-conditioning circuit circulates independently. When port Ⅰ and port Ⅱ of the three-way control valve are connected and port Ⅲ is blocked, all the heat exchange medium in the air-conditioning circuit flows into the heat mixing module. When port Ⅰ, port Ⅱ and port Ⅲ of the three-way control valve are all connected, part of the heat exchange medium in the air-conditioning circuit flows into the heat mixing module.

[0010] Optionally, the multi-way valve has a third interface and a fourth interface. The battery pack circuit includes a battery pack, a pipeline connecting the fourth interface and the battery pack, and a pipeline connecting the third interface and the battery pack. A first water pump is also provided in the battery pack circuit.

[0011] Optionally, the thermal management system includes a plate heat exchanger circuit. The multi-way valve has a fifth interface and a sixth interface. The plate heat exchanger circuit includes a plate heat exchanger, a pipeline connecting the fifth interface and the plate heat exchanger, and a pipeline connecting the sixth interface and the plate heat exchanger.

[0012] Optionally, the thermal management system has at least one of the following working modes: In the first working mode, the third interface and the fourth interface are connected, and the heat exchange medium in the battery pack is evenly heated. In the second working mode, the third interface and the sixth interface are connected, the fourth interface and the fifth interface are connected, and the heat exchange medium in the battery pack flows into the plate heat exchanger for heat dissipation and then flows back to the battery pack.

[0013] Optionally, the multi-way valve has a seventh interface and an eighth interface. The low-temperature radiator circuit includes a low-temperature radiator, a pipeline connecting the seventh interface and the low-temperature radiator, and a pipeline connecting the eighth interface and the low-temperature radiator.

[0014] Optionally, the low-temperature radiator circuit and the electric drive circuit are respectively connected to one interface of the multi-way valve and share one interface.

[0015] Optionally, the multi-way valve has a ninth interface. The electric drive circuit includes an electric drive assembly, a pipeline connecting the ninth interface and the electric drive assembly, and a pipeline connecting the electric drive assembly to the pipeline. A second water pump is also provided in the electric drive circuit.

[0016] Optionally, the air-conditioning circuit includes a compressor, a liquid-cooled condenser, a heater, an air-conditioning box, and a plate heat exchanger. The water outlet of the liquid-cooled condenser is connected to port I of the three-way control valve through a pipeline, and the water inlet of the liquid-cooled condenser is connected to the second communication valve through a pipeline. A third water pump is also provided in the air-conditioning circuit.

[0017] Optionally, the air-conditioning box includes a box body and an indoor condenser provided in the box body. The indoor condenser can release the heat of the high-temperature and high-pressure gas compressed by the compressor and supply the heat to the passenger compartment.

[0018] Optionally, the thermal management system has at least one of the following working modes: The third working mode, in which the ninth interface and the eighth interface are connected, and the heat exchange medium in the electric drive assembly is equalized in temperature. The fourth working mode, in which the ninth interface and the seventh interface are connected, and the heat exchange medium in the electric drive assembly flows into the low-temperature radiator to dissipate heat and then flows back to the electric drive assembly. The fifth working mode, in which the fourth interface and the seventh interface are connected, and the third interface and the ninth interface are connected. The heat exchange media in the battery pack and the electric drive assembly both flow into the low-temperature radiator for cooling.

[0019] Optionally, the thermal management system has at least one of the following working modes: The sixth working mode, in which the fourth interface and the eighth interface are connected, and the third interface and the ninth interface are connected. The waste heat of the electric drive assembly heats the battery pack.

[0020] Optionally, the thermal management system has at least one of the following working modes: The seventh working mode, in which the sixth interface and the eighth interface are connected, and the fifth interface and the ninth interface are connected. The plate heat exchanger recovers the heat of the electric drive assembly. The eighth working mode, in which the sixth interface and the seventh interface are connected, and the fifth interface and the ninth interface are connected. The environmental heat absorbed by the low-temperature radiator and the waste heat of the electric drive assembly are both transferred to the plate heat exchanger. The ninth working mode, in which the second interface and the seventh interface are connected, and the first interface and the ninth interface are connected. The heat exchange medium of the electric drive assembly flows into the low-temperature radiator for cooling, and the heat exchange medium of the liquid-cooled condenser in the air-conditioning circuit can be selectively connected to the low-temperature radiator for cooling. The tenth working mode, where the second interface and the third interface are connected and communicated, the fourth interface and the first interface are connected and communicated, the fifth interface and the ninth interface are connected and communicated, the sixth interface and the eighth interface are connected and communicated, and the heat generated by the electric drive assembly, the compressor and the heater in the air-conditioning circuit is transferred to the battery pack.

[0021] Optionally, the multi-way valve includes a housing and a valve core disposed in the housing. The housing is provided with a plurality of interfaces, and the valve core can rotate to conduct at least two of the interfaces.

[0022] Optionally, the thermal management system further includes a storage tank, and at least one liquid replenishment pipeline and / or at least one gas replenishment pipeline connected to the storage tank.

[0023] Optionally, there are two liquid replenishment pipelines. The water outlet of the first liquid replenishment pipeline is connected to the inlet of the first water pump in the battery pack circuit, and the water outlet of the second liquid replenishment pipeline is connected to the upstream of the second water pump in the electric drive circuit.

[0024] Optionally, there are two gas replenishment pipelines. The gas outlet of the first gas replenishment pipeline is connected to the outlet of the electric drive assembly in the electric drive circuit, and the gas outlet of the second gas replenishment pipeline is connected to the outlet of the plate heat exchanger in the plate heat exchanger circuit.

[0025] Optionally, the multiple circuits are respectively formed by the flow channels of the flow channel plate, and some of the flow channels of the flow channel plate form the liquid replenishment pipeline and / or the gas replenishment pipeline.

[0026] According to the second aspect of the embodiments of the present disclosure, a vehicle is provided, including the above thermal management system.

[0027] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: In the thermal management system provided by the present disclosure, by controlling the multi-way valve and the heat mixing module, the heat exchange medium in the air-conditioning circuit can be circulated separately, the direct cooling and heating of the heat pump system can be realized, and it can directly act on the passenger compartment; it can also realize that part or all of the heat exchange medium in the air-conditioning circuit flows into other heat exchange circuits, realize the indirect cooling and heating of the heat pump system, realize the utilization and distribution of heat, and meet the needs of different scenarios.

[0028] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing the embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0030] Figure 1 and Figure 2It is a structural block diagram of a thermal management system shown according to an exemplary embodiment.

[0031] Figure 3 It is a flow path diagram of the heat exchange medium in the first working mode of the thermal management system provided by the present disclosure.

[0032] Figure 4 It is a flow path diagram of the heat exchange medium in the third working mode of the thermal management system provided by the present disclosure.

[0033] Figure 5 It is a flow path diagram of the heat exchange medium in the second working mode of the thermal management system provided by the present disclosure.

[0034] Figure 6 and Figure 7 It is a flow path diagram of the heat exchange medium in the balanced temperature difference mode of the thermal management system provided by the present disclosure.

[0035] Figure 8 It is a flow path diagram of the heat exchange medium in the fourth working mode of the thermal management system provided by the present disclosure.

[0036] Figure 9 It is a flow path diagram of the heat exchange medium in the fifth working mode of the thermal management system provided by the present disclosure.

[0037] Figure 10 It is a flow path diagram of the heat exchange medium in the sixth working mode of the thermal management system provided by the present disclosure.

[0038] Figure 11 and Figure 12 It is a flow path diagram of the heat exchange medium in the seventh working mode of the thermal management system provided by the present disclosure.

[0039] Figure 13 and Figure 14 It is a flow path diagram of the heat exchange medium in the eighth working mode of the thermal management system provided by the present disclosure.

[0040] Figure 15 and Figure 16 It is a flow path diagram of the heat exchange medium in the ninth working mode of the thermal management system provided by the present disclosure.

[0041] Figure 17 It is a flow path diagram of the heat exchange medium in the tenth working mode of the thermal management system provided by the present disclosure.

[0042] Figure 18 It is a structural block diagram of a thermal management system shown according to another exemplary embodiment.

[0043] Figure 19 and Figure 20 It is a flow path diagram of the heat exchange medium under the condition that the air conditioning circuit of the thermal management system provided by the present disclosure operates independently.

[0044] Figure 21 It is a flow chart of the heat exchange medium under the air-conditioning circuit and battery heating conditions of the thermal management system provided by the present disclosure.

[0045] Figure 22 and Figure 23 It is a flow chart of the heat exchange medium under the dehumidification condition of the thermal management system provided by the present disclosure.

[0046] Description of the reference numerals L1 - Battery pack circuit; L2 - Plate heat exchanger circuit; L3 - Low-temperature radiator circuit; L4 - Electric drive circuit; L5 - Air-conditioning circuit; 1 - Battery pack; 11 - First water pump; 2 - Plate heat exchanger; 3 - Low-temperature radiator; 4 - Electric drive assembly; 41 - Second water pump; 5 - Air conditioner; 50 - Air-conditioning box; 51 - Third water pump; 52 - Warm air core; 53 - Heater; 54 - Liquid-cooled condenser; 55 - Compressor; 10 - Multi-way valve; A - Ninth interface; B - First interface; C - Second interface; D - Third interface; E - Fourth interface; F - Fifth interface, G - Sixth interface; H - Seventh interface; I - Eighth interface; P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 - Pipelines; 6 - Hybrid heating module; 61 - Three-way control valve; 62 - First connection valve; 63 - Second connection valve; 64 - Third connection valve; 7 - Storage tank. Detailed implementation manners

[0047] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0048] It should be noted that all actions of obtaining signals, information or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and obtaining the authorization given by the owner of the corresponding device.

[0049] In the present disclosure, unless otherwise stated, terms such as "upstream", "downstream", "inlet", "import" and "outlet" are for the flow direction of the heat exchange medium in different circuits, and the specific direction can be referred to the direction indicated by the arrows in different drawings. "Inside" and "outside" generally refer to the inside and outside of the contour of the corresponding component. The use of terms such as "first" and "second" is for the purpose of distinguishing different components and does not have sequentiality and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements.

[0050] In a related embodiment of the present disclosure, the thermal management system integrates the refrigerant system and the coolant system. When heating at low temperature, the compressor delta cycle is adopted, with relatively low efficiency. The air-conditioning circuit is not equipped with an independent heater, and rapid heating at low temperature cannot be achieved. When refrigerating, indirect condensation is adopted, resulting in low refrigeration efficiency of the system. In another related embodiment of the present disclosure, the indirect heat pump has low efficiency and low integration. In another related embodiment of the present disclosure, the air conditioner uses an air heater, with low coupling with the battery heating, and the coexistence of the indirect heat pump and the direct heat pump cannot be achieved.

[0051] To solve the above problems, as Figure 1 shown, the present disclosure provides a thermal management system, which includes an air-conditioning circuit L5 (as shown by the purple circuit in Figure 1 ), a multi-way valve 10, and a heat mixing module 6 connected between the multi-way valve 10 and the air-conditioning circuit L5 (as shown by the yellow line in Figure 1 ). The heat mixing module 6 and the multi-way valve 10 are jointly configured to: selectively circulate the heat exchange medium in the air-conditioning circuit L5 alone, or allow at least part of the heat exchange medium to flow out of the air-conditioning circuit L5.

[0052] Here, it should be noted that the present disclosure includes embodiments in which the heat exchange medium in the air-conditioning circuit L5 circulates alone, embodiments in which all of the heat exchange medium in the air-conditioning circuit L5 flows out for heat exchange with other heat exchange circuits, and embodiments in which part of the heat exchange medium in the air-conditioning circuit L5 flows out for heat exchange with other heat exchange circuits. The heat exchange medium can be a coolant that plays a cooling role, can be cold water, can be hot water that plays a heating role, or can be the coolant in the air-conditioning circuit, all of which can be generally referred to as the heat exchange medium.

[0053] In the thermal management system provided by the present disclosure, by controlling the multi-way valve 10 and the heat mixing module 6, the heat exchange medium in the air-conditioning circuit L5 can be circulated alone to achieve direct refrigeration and heating of the heat pump system, directly acting on the passenger compartment; or part or all of the heat exchange medium in the air-conditioning circuit L5 can flow into other heat exchange circuits to achieve indirect refrigeration and heating of the heat pump system, realize the utilization and distribution of heat, and meet the requirements of different scenarios.

[0054] As Figures 1 to 17As shown, the present disclosure provides a thermal management system, which includes a multi-way valve 10 and a battery pack circuit L1, a plate heat exchanger circuit L2, a low-temperature radiator circuit L3, an electric drive circuit L4, and an air-conditioning circuit L5 that are respectively connected to different interfaces of the multi-way valve 10. At least two interfaces of the multi-way valve 10 can be selectively connected to enable heat exchange between the heat transfer media of at least two of the battery pack circuit L1, the plate heat exchanger circuit L2, the low-temperature radiator circuit L3, the electric drive circuit L4, and the air-conditioning circuit L5, or to equalize the heat of the heat transfer media of one of them.

[0055] Here, it should be noted that the heat transfer medium can be a coolant that plays a cooling role, can be cold water, can also be hot water that plays a heating role, or can be the coolant in the air-conditioning circuit, and can all be summarized as the heat transfer medium. In the present disclosure, the number of interfaces of the multi-way valve 10 can be designed as needed. For example, it can be a ten-way valve, and the five circuits respectively occupy two interfaces, one in and one out; of course, it can also be disassembled into an eight-way valve and a three-way valve. The seventh interface H and the eighth interface I can be used as the two interfaces of the three-way valve, and the other interface of the three-way valve is shared with the eight-way valve. That is, on the basis of the embodiment shown in the figure, adding a three-way valve to merge the seventh interface H and the eighth interface I into one interface, and the eight-way valve and the added three-way valve are respectively provided with motors and adopt a dual-motor form, which all belong to the protection scope of the present disclosure. The above five heat exchange circuits can exist alone, or any two or more of them can exist simultaneously, which all belong to the protection scope of the present disclosure. Specifically, an embodiment including five heat exchange circuits will be used as an example for detailed introduction below. Different colors in the figure represent different circuits, which are only used to clearly show the interaction between different circuits and do not impose any restrictions on the circuits.

[0056] In the thermal management system provided by the present disclosure, by controlling the multi-way valve 10, the heat transfer media from the battery pack 1, the electric drive 4, the air-conditioning 5, and the cooling module (the low-temperature radiator 3 and the plate heat exchanger 2) are scheduled, realizing the efficient interaction of the battery pack 1, the electric drive assembly 4, the plate heat exchanger 2, the low-temperature radiator 3, and the air-conditioning 5, enabling heat exchange between multiple circuits in different temperature ranges, improving the heat exchange efficiency, making the system operate efficiently, and at the same time improving the integration of the system. In addition, the thermal management system can also achieve internal temperature equalization control of a single circuit, balance the internal temperature difference, and improve the operating efficiency of components.

[0057] Figure 1 For Figure 2 a part of the structure in the shown embodiment, Figure 1 it is Figure 2 the structure in the air-conditioning circuit L5 in Figure 2As shown, when the air conditioner is in the cooling mode, the gaseous refrigerant after gas-liquid separation enters the compressor 55, where it is compressed into a high-temperature and high-pressure gaseous refrigerant. The heat is transferred to the coolant in the liquid-cooled condenser 54, and the refrigerant becomes a high-temperature and high-pressure liquid refrigerant. It is throttled by the electronic expansion valve of the plate heat exchanger 2 and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant. It absorbs heat in the plate heat exchanger 2 and becomes a low-temperature and low-pressure gaseous refrigerant, then returns to the compressor 55. The separated liquid directly enters the evaporator for evaporation and heat absorption, and then returns to the compressor 55 through the plate heat exchanger 2, completing the cooling operation of the occupant compartment.

[0058] In the case of the independent circulation of the air-conditioning circuit L5, under normal winter conditions (> -10°C), when the air conditioner is in the heating mode, as Figure 19 shown, the compressor 55 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, which directly enters the indoor condenser to release heat and supply heat to the occupant compartment, completing the heating of the occupant compartment. In extremely cold conditions (-12°C to -10°C), as Figure 20 shown, the compressor 55 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The heat is transferred to the coolant in the liquid-cooled condenser 54, and the refrigerant becomes a high-temperature and high-pressure liquid refrigerant. And a part of the liquid refrigerant passing through the liquid-cooled condenser 54 can enter the heater 53 to be heated and then enter the heater core 52 to participate in the air-conditioning heating. By the synergistic action of the indoor condenser and the liquid-cooled condenser 54, the heat dissipation efficiency of the heat pump is improved, the working environment temperature of the heat pump is reduced, and the application range of the heat pump is expanded.

[0059] The following will introduce in detail the interaction between different circuits in the thermal management system provided by the present disclosure with reference to the accompanying drawings. The multiple working modes described below can be appropriately combined. The thermal management system has at least one of the following working modes.

[0060] As Figure 3 shown, the multi-way valve 10 has a third interface D and a fourth interface E. The battery pack circuit L1 includes a battery pack 1, a pipeline P3 connecting the fourth interface E and the battery pack 1, a pipeline P4 connecting the third interface D and the battery pack 1, and a first water pump 11 provided on the pipeline P4. Of course, the first water pump 11, as well as the second water pump 41 and the third water pump 51 to be introduced below, are not limited to being arranged on a certain pipeline. As long as they are arranged in the corresponding circulation circuit, the first water pump 11 is arranged in the battery pack circuit L1, the second water pump 41 is arranged in the electric drive circuit L4, and the third water pump 51 is arranged in the air-conditioning circuit L5. As Figure 3As shown, the thermal management system provided by the present disclosure has a first working mode, in which the third interface D and the fourth interface E are connected and communicated, and the heat exchange medium in the battery pack 1 is evenly heated. This working mode takes into account that when the battery pack 1 is working or charging, the heat exchange capabilities at the middle position and the two ends are different, resulting in uneven temperatures in different parts of the battery pack 1. By making the heat exchange medium in the battery pack 1 flow, it can play a role in balancing the temperature difference inside the battery pack 1.

[0061] Furthermore, as Figure 7 shown, in order to achieve the cooling of the battery pack 1 in summer and the recovery and utilization of the heat generated during the fast charging of the battery pack 1, in the present disclosure, the multi-way valve 10 has a fifth interface F and a sixth interface G. The plate heat exchanger circuit L2 includes a plate heat exchanger 2, a pipeline P2 connecting the fifth interface F and the plate heat exchanger 2, and a pipeline P1 connecting the sixth interface G and the plate heat exchanger 2. As Figure 7 shown, the thermal management system provided by the present disclosure has a second working mode, in which the third interface D and the sixth interface G are connected and communicated, and the fourth interface E and the fifth interface F are connected and communicated. The heat exchange medium in the battery pack 1 flows into the plate heat exchanger 2 to dissipate heat and then flows back to the battery pack 1. The battery pack 1 dissipates heat through the plate heat exchanger 2 to ensure the cooling effect on the battery pack 1.

[0062] As Figure 8 shown, the multi-way valve 10 has a seventh interface H and an eighth interface I. The low-temperature radiator circuit L3 includes a low-temperature radiator 3, a pipeline P10 connecting the seventh interface H and the low-temperature radiator 3, and a pipeline P9 connecting the eighth interface I and the low-temperature radiator 3.

[0063] In the present disclosure, as Figure 8 shown, the low-temperature radiator circuit L3 and the electric drive circuit L4 are respectively connected to one interface of the multi-way valve 10 and share one interface. The multi-way valve 10 has a ninth interface A. The electric drive circuit L4 includes an electric drive assembly 4, a pipeline P7 connecting the ninth interface A and the electric drive assembly 4, and a pipeline P8 connecting the electric drive assembly 4 to the pipeline P9. A second water pump 41 is provided on the pipeline P8.

[0064] As Figure 4 shown, the thermal management system provided by the present disclosure has a third working mode, in which the ninth interface A and the eighth interface I are connected and communicated, and the heat exchange medium in the electric drive assembly 4 is evenly heated to realize the self-circulation of the electric drive circuit L4, realize the heat storage of the electric drive circuit L4 at low temperatures, and improve the operating efficiency of the electric drive assembly 4.

[0065] As Figure 8 shown, the thermal management system provided by the present disclosure has a fourth working mode, in which the ninth interface A and the seventh interface H are connected and communicated, and the heat exchange medium in the electric drive assembly 4 flows into the low-temperature radiator 3 to dissipate heat and then flows back to the electric drive assembly 4. The electric drive assembly 4 is cooled by the low-temperature radiator 3 to ensure that the temperature of the electric drive assembly 4 can meet the working requirements.

[0066] As mentioned above, the air-conditioning circuit L5 may include a compressor 55, a liquid-cooled condenser 54, a heater 53, an air-conditioning box 50, and a plate heat exchanger 2. As Figure 1 and Figure 2 shown, the water outlet of the liquid-cooled condenser 54 is connected to the port I of the three-way control valve 61 through a pipeline P5, and the water inlet of the liquid-cooled condenser 54 is connected to the second connection valve 63 through a pipeline P6. A third water pump 51 is provided on the pipeline P6.

[0067] In the present disclosure, the air-conditioning box 50 includes a box body and an indoor condenser provided in the box body. The indoor condenser can release the heat of the high-temperature and high-pressure gas compressed by the compressor and provide the heat to the passenger compartment. The air-conditioning circuit L5 provided by the present disclosure is a dual-mode heat pump. The heat pump system has two heat dissipation units, namely, the liquid-cooled condenser 54 and the indoor condenser. The indoor condenser can be arranged in the air-conditioning pipe to provide heat for the passenger compartment. The liquid-cooled condenser can not only provide heat for the passenger compartment, but also provide heating for the battery, and at the same time can balance the excess system heat generation.

[0068] As Figure 9 shown, the heat management system provided by the present disclosure has a fifth working mode. The fourth interface E and the seventh interface H are connected, and the third interface D and the ninth interface A are connected. The heat exchange media in the battery pack 1 and the electric drive assembly 4 both flow into the low-temperature radiator 3 for cooling, and the cooling of the battery pack 1 at low temperature can be realized without passing through the compression refrigeration circuit.

[0069] As Figure 10 shown, the heat management system of the present disclosure has a sixth working mode. The fourth interface E and the eighth interface I are connected, and the third interface D and the ninth interface A are connected. The waste heat of the electric drive assembly 4 is used to heat the battery pack 1, and the waste heat of the electric drive assembly 4 is fully utilized to improve the utilization rate.

[0070] Further, in the present disclosure, the heat mixing module 6 may be of any suitable structure. The heat mixing module 6 and the multi-way valve 10 are jointly configured to: selectively enable all or part of the heat exchange medium in the air-conditioning circuit L5 to flow into other circuits for heat exchange. Here, the "other circuit" may be any one of the circuits L1 including the battery, the plate heat exchanger circuit L2, the low-temperature radiator circuit L3, and the electric drive circuit L4 in the air-conditioning circuit L5, and will be specifically introduced in combination with the structure of the heat mixing module 6.

[0071] In an exemplary embodiment of the present disclosure, as Figure 1As shown, the hybrid heat module 6 includes a three-way control valve 61, a first connection valve 62, a second connection valve 63, and a third connection valve 64 that are sequentially connected by pipelines. The first connection valve 62, the second connection valve 63, and the third connection valve 64 are three-way valves respectively. The three-way control valve 61 and the first connection valve 62 are connected to the air-conditioning circuit L5. The second connection valve 63 is connected to the first interface B of the multi-way valve 10, and the third connection valve 64 is connected to the second interface C of the multi-way valve 10. In other embodiments, the hybrid heat module 6 is not limited to four valves and is not limited to three-way valves, and can be designed according to needs.

[0072] Take Figure 1 the illustrated embodiment as an example. When the port Ⅰ and port Ⅲ of the three-way control valve 61 are connected and port Ⅱ is blocked, the air-conditioning circuit L5 circulates alone, and can perform refrigeration or heating respectively to achieve the direct heat pump function. When the port Ⅰ and port Ⅱ of the three-way control valve 61 are connected and port Ⅲ is blocked, all the heat exchange media in the air-conditioning circuit L5 flow into other circuits through the hybrid heat module 6 for heat exchange. When the port Ⅰ, port Ⅱ, and port Ⅲ of the three-way control valve 61 are all connected, part of the heat exchange media in the air-conditioning circuit L5 flow into other circuits through the hybrid heat module 6 for heat exchange. It can be selectively not connected to the air-conditioning circuit L5 at all, fully connected, or partially connected according to needs to achieve the indirect heat pump function to meet the heat exchange requirements under different working conditions.

[0073] Take Figure 5 the interaction between the air-conditioning circuit L5 and the battery pack circuit L1 as an example. The hybrid heat module 6 and the multi-way valve 10 are jointly configured to selectively allow the heat exchange media in the air-conditioning circuit L5 to flow into the battery pack circuit L1 so that the temperature difference between the heat exchange media in the air-conditioning circuit L5 and the battery pack circuit L1 is within a first predetermined range. Port Ⅱ is the ratio of the hot water flow from the air-conditioning circuit L5 to the battery pack circuit L1. The heat entering the battery pack 1 through port Ⅱ can be used to heat the battery pack 1, thereby achieving the controllability of the temperature of the battery pack 1. The heated hot water returns to the air-conditioning circuit L5 to ensure the mass conservation of the air-conditioning circuit L5 and the battery pack circuit L1. The hot water entering the battery pack circuit L1 through port Ⅱ is mixed with the low-temperature coolant of the original battery pack circuit and then enters the battery pack 1 to achieve the temperature difference control between the air-conditioning circuit L5 and the battery pack circuit L1.

[0074] Take Figure 6 the interaction between the air-conditioning circuit L5 and the electric drive circuit L4 as an example. The hybrid heat module 6 and the multi-way valve 10 are jointly configured to selectively allow the heat exchange media in the air-conditioning circuit L5 to flow into the electric drive circuit L4 so that the temperature difference between the heat exchange media in the air-conditioning circuit L5 and the electric drive circuit L4 is within a second preset range. Similar to Figure 5 the above, the heat in the air-conditioning circuit L5 can be used to heat the electric drive assembly 4, which is mainly used for heat storage in the electric drive circuit L4 at low temperatures to ensure the temperature of the electric drive assembly 4 and improve the operating efficiency of the electric drive assembly 4.

[0075] Taking the interaction between the air-conditioning circuit L5 and the electric drive circuit L4 shown in Figure 15 and Figure 16 as an example, the multi-way valve 10 and the heat mixing module 6 are jointly configured to optionally allow the heat exchange medium in the liquid-cooled condenser 54 in the air-conditioning circuit L5 to flow into the low-temperature radiator circuit L3. As shown in Figure 16 , the high-temperature and high-pressure liquid refrigerant flowing out of the liquid-cooled condenser 54 can enter the low-temperature radiator 3 through port II in whole or in part for heat dissipation. Especially in a high-temperature environment, when the air-conditioning refrigeration cannot meet the requirements, transferring the condensation heat of the air-conditioning circuit L5 to the low-temperature radiator 3 can improve the cooling efficiency of the air-conditioning circuit L5.

[0076] To improve the heat pump efficiency of the air-conditioning circuit, it is possible to choose to reduce the condensation amount of the liquid-cooled condenser 54 or increase the temperature of the heat exchange medium in the plate heat exchanger 2. Based on this design idea, in an embodiment of the present disclosure, as shown in Figure 11 and Figure 12 , the heat management system provided by the present disclosure has a seventh working mode, the sixth interface G and the eighth interface I are connected, the fifth interface F and the ninth interface A are connected, and the plate heat exchanger 2 recovers the heat of the electric drive assembly 4. At low temperatures, the heat of the electric drive assembly 4 is recovered through the plate heat exchanger 2 to enhance the performance of the air-source heat pump.

[0077] As an alternative embodiment of the embodiment shown in Figure 11 and Figure 12 , as shown in Figure 13 and Figure 14 , the heat management system provided by the present disclosure also has an eighth working mode, the sixth interface G and the seventh interface H are connected, the fifth interface F and the ninth interface A are connected, and the environmental heat absorbed by the low-temperature radiator 3 and / or the waste heat of the electric drive assembly 4 are both transferred to the plate heat exchanger 2. When the temperature is low but the ambient temperature is higher than the temperature of the heat exchange medium in the low-temperature radiator 3, the heat in the environment can be absorbed by the low-temperature radiator 3 and transferred to the plate heat exchanger 2. As long as it can be provided, whether it is the low-temperature radiator 3 or the electric drive assembly 4, the heat can be transferred to the plate heat exchanger 2 to improve the heat pump performance.

[0078] Under high-temperature working conditions, both the air conditioner and the battery pack 1 have a large cooling demand, the condenser load is large, and improving the heat dissipation capacity of the liquid-cooled condenser 54 can improve the efficiency of the entire system. In another exemplary embodiment of the present disclosure, as shown in Figure 15 and Figure 16 , the heat management system provided by the present disclosure also has a ninth working mode, the second interface C and the seventh interface H are connected, the first interface B and the ninth interface A are connected, and the heat exchange medium of the electric drive assembly 4 flows into the low-temperature radiator 3 for cooling (the circuit shown by the green line in Figure 15 ), and the air-conditioning circuit L5 (Figure 15 In the circuit shown by the red line), the heat exchange medium of the liquid-cooled condenser 54 can be selectively connected to the low-temperature radiator 3 for cooling; in this working mode, by controlling the ratio of the No. II port, the ratio of the hot water flowing from the liquid-cooled condenser 54 to the low-temperature radiator 3 is controlled, and in a high-temperature environment, the condensation heat of the liquid-cooled condenser 54 in the air-conditioning circuit can be transferred to the low-temperature radiator 3, and the low-temperature radiator 3 is used to improve the cooling efficiency of the air-conditioning circuit. For example, the ninth working mode and Figure 7 The second working mode of can exist simultaneously, and the efficient refrigeration of the occupant compartment, the cooling of the electric drive assembly and the battery pack can be realized at the same time. In addition, in the ninth working mode, considering that in the spring and autumn working conditions, the air-conditioning circuit often operates in the defrosting mode, and the occupant compartment needs to be cooled first and then heated, at this time, more heat is required, and the condensation heat is recovered through the liquid-cooled condenser 54, but there may be more recovered heat than required. By transferring part of the heat to the low-temperature radiator 3 through the heat mixing module 6, the heat can be released, and in the medium-temperature section, the application range of the heat pump system in spring and autumn can be expanded, and the continuous use of the heat pump can be realized.

[0079] To meet the normal working requirements of the battery pack 1 at low temperatures, the thermal management system of the present disclosure also has a tenth working mode, such as Figure 17 shown, the second interface C and the third interface D are connected, the fourth interface E and the first interface B are connected, the fifth interface F and the ninth interface A are connected, the sixth interface G and the eighth interface I are connected, and the heat generated by the electric drive assembly 4, the compressor 55 and the heater 53 in the air-conditioning circuit L5 are all transferred to the battery pack 1. In the tenth working mode, the heat of the electric drive assembly 4 is recovered through the plate heat exchanger 2 to generate heat due to electric drive stall, and heat is absorbed from the electric drive. At this time, the electric drive is actively generating heat. The heat of the compressor 55 and the heater 53 is transferred to the occupant compartment and the battery pack 1 as needed through the heat mixing module 6, realizing the heating of the battery pack 1 by three heat sources, ensuring the normal working of the battery pack 1 at low temperatures, improving the heating rate of the battery pack 1 at low temperatures, and at the same time improving the charging speed of the battery pack 1. At this time, a maximum of 18 kW of heat can be obtained, which can greatly increase the heating rate of the air conditioner or the battery under extremely low temperature conditions, improve the comfort of the occupant compartment and reduce the charging duration.

[0080] When the air-conditioning circuit and the battery heating operate synchronously, in general winter working conditions, in the present disclosure, as Figure 21 shown, the indoor condenser heats the occupant compartment, and part of the heat exchange medium flowing out of the liquid-cooled condenser 54 in the air-conditioning circuit L5 flows into the battery pack circuit L1, and the liquid-cooled condenser 54 heats the battery, making full use of the advantages of the heat exchangers of both.

[0081] In addition, in spring and autumn, when the environmental humidity is relatively high, such as Figure 22 and Figure 23As shown, the heat absorbed during dehumidification is transferred by the compressor 55 to the indoor condenser and the liquid-cooled condenser 54, and then to the passenger compartment, significantly reducing energy consumption compared with the conventional evaporator dehumidification and heater heat compensation.

[0082] Furthermore, during the dehumidification operation mode, there is easily an excess heat phenomenon. However, in order to ensure the dehumidification effect, it is not possible to directly select to stop the machine. At this time, the mode selection is carried out according to the following priority, as Figure 22 shown, the excess heat can be first transferred to the battery to store heat in the battery, and this part of the heat can be recovered through the heat pump mode after the dehumidification is completed. After that, as Figure 23 shown, if the battery temperature is high, this part of the heat is transferred to the electric drive circuit L4 to store heat, ensuring the electric drive water temperature increase efficiency.

[0083] In the present disclosure, the multi-way valve 10 includes a housing and a valve core disposed inside the housing. A plurality of interfaces are formed on the housing, and the valve core can rotate to conduct at least two interfaces. That is, a single-motor drive method can be adopted, and the valve core is driven by the motor to rotate to conduct the above two or more interfaces respectively.

[0084] In the present disclosure, the water pump is used as the power source in the cooling circuit. To improve the system integration degree, the flow channel plate is designed as the carrier of the water valve and the water pump, and the water pump volute and the flow channel plate are integrally designed to reduce the number of pipelines.

[0085] In the present disclosure, the liquid filling circuits of the battery pack 1, the electric drive assembly 4, the low-temperature radiator 3, the plate heat exchanger 2 and other circuits are integrally designed. As Figure 18 shown, the thermal management system provided by the present disclosure further includes a storage tank 7 and at least one liquid filling pipeline (such as Figure 18 shown by the thick black solid line in Figure 18 ) and / or at least one gas filling pipeline (such as shown by the dotted line in

[0086] ) connected to the storage tank 7. A plurality of liquid filling pipelines are connected to the same storage tank 7 and share a liquid filling port. The liquid filling pipelines can be two. The outlet of the first liquid filling pipeline is connected to the inlet of the first water pump 11, and the outlet of the second liquid filling pipeline is connected to the upstream of the second water pump 41. The gas filling pipelines can be two. The gas outlet of the first gas filling pipeline is connected to the outlet of the electric drive assembly 4, and the gas outlet of the second gas filling pipeline is connected to the outlet of the plate heat exchanger 2.

[0087] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the present disclosure. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0088] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A thermal management system, characterized in that: It includes an air-conditioning circuit, a multi-way valve and a heat mixing module connected between the multi-way valve and the air-conditioning circuit. The heat mixing module and the multi-way valve are configured together to selectively allow the heat exchange medium in the air-conditioning circuit to circulate separately, or allow at least part of the heat exchange medium to flow out of the air-conditioning circuit.

2. The thermal management system according to claim 1, characterized in that: The thermal management system includes a battery pack circuit, and the heat mixing module and the multi-way valve are jointly configured to selectively allow the heat exchange medium in the air-conditioning circuit to flow into the battery pack circuit so that the temperature difference between the heat exchange medium in the air-conditioning circuit and the battery pack circuit is within a first predetermined range.

3. The thermal management system according to claim 1, characterized in that: The thermal management system includes an electric drive circuit, and the heat mixing module and the multi-way valve are jointly configured to selectively allow the heat exchange medium in the air-conditioning circuit to flow into the electric drive circuit so that the temperature difference between the heat exchange medium in the air-conditioning circuit and the electric drive circuit is within a second preset range.

4. The thermal management system according to claim 1, characterized in that: The thermal management system includes a low-temperature radiator circuit, and the multi-way valve and the heat mixing module are jointly configured to selectively allow the heat exchange medium in the liquid-cooled condenser in the air-conditioning circuit to flow into the low-temperature radiator circuit.

5. The thermal management system according to any one of claims 1 to 4, characterized in that: The heat mixing module includes a three-way control valve, a first connecting valve, a second connecting valve and a third connecting valve which are connected in sequence through pipelines. The first connecting valve, the second connecting valve and the third connecting valve are three-way valves respectively. The three-way control valve and the first connecting valve are connected to the air-conditioning circuit, the second connecting valve is connected to the first interface of the multi-way valve, and the third connecting valve is connected to the second interface of the multi-way valve.

6. The thermal management system according to claim 5, characterized in that: Ports I and III of the three-way control valve are connected, and when port II is cut off, the air conditioning circuit circulates alone; Ports I and II of the three-way control valve are connected, and when port III is closed, all the heat exchange medium in the air conditioning circuit flows into the heat mixing module; When ports Ⅰ, Ⅱ and Ⅲ of the three-way control valve are all connected, part of the heat exchange medium in the air-conditioning circuit flows into the heat mixing module.

7. The thermal management system according to claim 5, characterized in that: The thermal management system includes a battery pack circuit, the multi-way valve has a third interface and a fourth interface, the battery pack circuit includes a battery pack, a pipeline connecting the fourth interface and the battery pack, and a pipeline connecting the third interface and the battery pack, and a first water pump is also provided in the battery pack circuit.

8. The thermal management system according to claim 7, characterized in that: The thermal management system includes a plate heat exchanger circuit, the multi-way valve has a fifth interface and a sixth interface, and the plate heat exchanger circuit includes a plate heat exchanger, a pipeline connecting the fifth interface and the plate heat exchanger, and a pipeline connecting the sixth interface and the plate heat exchanger.

9. The thermal management system according to claim 8, characterized in that: The thermal management system has at least one of the following operating modes: In the first working mode, the third interface and the fourth interface are connected, and the heat exchange medium in the battery pack is evenly heated; In the second working mode, the third interface is connected to the sixth interface, the fourth interface is connected to the fifth interface, and the heat exchange medium in the battery pack flows into the plate heat exchanger to dissipate heat and then flows back to the battery pack.

10. The thermal management system according to claim 8, characterized in that: The thermal management system includes a low-temperature radiator circuit, the multi-way valve has a seventh interface and an eighth interface, and the low-temperature radiator circuit includes a low-temperature radiator, a pipeline connecting the seventh interface and the low-temperature radiator, and a pipeline connecting the eighth interface and the low-temperature radiator.

11. The thermal management system according to claim 10, characterized in that: The low-temperature radiator circuit and the electric drive circuit are respectively connected to an interface of the multi-way valve and share one interface.

12. The thermal management system according to claim 11, characterized in that: The multi-way valve has a ninth interface, the electric drive circuit includes an electric drive assembly, a pipeline connecting the ninth interface and the electric drive assembly, and a pipeline connecting the electric drive assembly to the pipeline, and a second water pump is also provided in the electric drive circuit.

13. The thermal management system according to claim 5, characterized in that: The air-conditioning circuit includes a compressor, a liquid-cooled condenser, a heater, an air-conditioning box and a plate heat exchanger. The water outlet of the liquid-cooled condenser is connected to the No. 1 port of the three-way control valve through a pipeline, and the water inlet of the liquid-cooled condenser is connected to the second connecting valve through a pipeline. A third water pump is also provided in the air-conditioning circuit.

14. The thermal management system according to claim 13, characterized in that: The air conditioning box includes a box body and an indoor condenser arranged in the box body. The indoor condenser can release the heat of the high-temperature and high-pressure gas compressed by the compressor and provide the heat to the passenger compartment.

15. The thermal management system according to claim 12, characterized in that: The thermal management system has at least one of the following operating modes: In the third working mode, the ninth interface is connected to the eighth interface, and the heat exchange medium in the electric drive assembly is heated uniformly; In the fourth working mode, the ninth interface is connected to the seventh interface, and the heat exchange medium in the electric drive assembly flows into the low-temperature radiator for heat dissipation and then flows back to the electric drive assembly; In the fifth working mode, the fourth interface is connected to the seventh interface, the third interface is connected to the ninth interface, and the heat exchange medium in the battery pack and the electric drive assembly flows into the low-temperature radiator for cooling.

16. The thermal management system according to claim 12, characterized in that: The thermal management system has at least one of the following operating modes: In the sixth working mode, the fourth interface is connected to the eighth interface, the third interface is connected to the ninth interface, and the waste heat of the electric drive assembly heats the battery pack.

17. The thermal management system according to claim 12, characterized in that: The thermal management system has at least one of the following operating modes: In the seventh working mode, the sixth interface is connected to the eighth interface, the fifth interface is connected to the ninth interface, and the plate heat exchanger recovers heat from the electric drive assembly; In the eighth working mode, the sixth interface is connected to the seventh interface, the fifth interface is connected to the ninth interface, and the ambient heat absorbed by the low-temperature radiator and the waste heat of the electric drive assembly are transferred to the plate heat exchanger; In the ninth working mode, the second interface is connected to the seventh interface, the first interface is connected to the ninth interface, the heat exchange medium of the electric drive assembly flows into the low-temperature radiator for cooling, and the heat exchange medium of the liquid-cooled condenser in the air-conditioning circuit can be selectively connected to the low-temperature radiator for cooling; In the tenth working mode, the second interface is connected to the third interface, the fourth interface is connected to the first interface, the fifth interface is connected to the ninth interface, the sixth interface is connected to the eighth interface, and the heat generated by the electric drive assembly, the compressor and the heater of the air-conditioning circuit are all transferred to the battery pack.

18. The thermal management system according to claim 1, characterized in that: The multi-way valve comprises a housing and a valve core arranged in the housing. The housing is provided with a plurality of interfaces, and the valve core can be rotated to connect at least two of the interfaces.

19. The thermal management system according to claim 1, characterized in that: The thermal management system further includes a storage tank, and at least one liquid replenishment pipeline and / or at least one gas replenishment pipeline connected to the storage tank.

20. The thermal management system according to claim 19, characterized in that: There are two liquid replenishment pipelines, the water outlet of the first liquid replenishment pipeline is connected to the inlet of the first water pump in the battery pack circuit, and the water outlet of the second liquid replenishment pipeline is connected to the upstream of the second water pump in the electric drive circuit.

21. The thermal management system according to claim 19, characterized in that: There are two air supply pipelines, the air outlet of the first air supply pipeline is connected to the outlet of the electric drive assembly in the electric drive circuit, and the air outlet of the second air supply pipeline is connected to the outlet of the plate heat exchanger in the plate heat exchanger circuit.

22. The thermal management system according to claim 20 or 21, characterized in that: A plurality of loops are respectively formed by flow channels of the flow channel plate, and part of the flow channels of the flow channel plate forms the liquid infusion pipeline and / or the gas infusion pipeline.

23. A vehicle, characterized in that: A thermal management system comprising any one of claims 1-22.

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