Thermal Management System

Abstract

The present application discloses a thermal management system, wherein the second heat exchanger and the indoor heat exchanger are located in the air-conditioning box. In the first auxiliary heating mode, the outlet of the indoor heat exchanger is connected to the inlet of the first flow regulating device, the outlet of the first flow regulating device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first heat exchange part, the second fluid driving device, the heat exchange device of the heating device, and the second heat exchange part are connected to form a loop, and the first heat exchange part and the second heat exchange part exchange heat. When the thermal management system operates in the first auxiliary heating mode, the heat exchange medium flowing out of the first flow regulating device flows through the outdoor heat exchanger and the first heat exchange part in sequence, and all the heat exchange medium flows through the outdoor heat exchanger and absorbs heat from the atmospheric environment, and then flows through the first heat exchange part. If there is waste heat in the heat exchange device of the heating device, the waste heat can be recovered to improve the heating effect. If there is no waste heat, the impact on the heating effect is small, thereby ensuring the stability of the heating effect.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and in particular to a thermal management system. Background Art

[0002] The thermal management system of a vehicle (such as an electric vehicle) can regulate the ambient temperature within the passenger compartment through an interior heat exchanger.

[0003] The thermal management system includes an indoor heat exchanger and an outdoor heat exchanger. In the heating mode, the indoor heat exchanger releases heat and the outdoor heat exchanger absorbs heat, thereby heating the passenger compartment. In the related art, the thermal management system also includes an auxiliary heat exchanger and a dual-channel heat exchanger. The auxiliary heat exchanger is arranged in the air-conditioning box. The dual-channel heat exchanger is used to perform thermal management on the battery. When the heating effect is not good, the coolant heated by the water-cooled electric heater flows through the auxiliary heat exchanger, and the auxiliary heat exchanger releases heat to supplement the heat in the passenger compartment. Part of the throttled refrigerant flows into the outdoor heat exchanger to absorb heat from the atmospheric environment, and the other part flows into the dual-channel heat exchanger to absorb heat from the battery. Since the throttled refrigerant is diverted, the refrigerant flowing through the outdoor heat exchanger is relatively reduced, and the heat absorbed at the outdoor heat exchanger is also relatively reduced. Since the temperature of the battery is closely related to the operating state of the vehicle, if there is heat absorption at the double-channel heat exchanger, the heating effect of the passenger compartment is better. If there is no heat absorption at the double-channel heat exchanger, the heating effect of the passenger compartment is poor, which makes the heating effect of the passenger compartment unstable. Summary of the invention

[0004] In view of the above-mentioned problems existing in the related art, the present application provides a thermal management system with a relatively stable heating effect.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a thermal management system, comprising: a compressor, an indoor heat exchanger, a first flow regulating device, an outdoor heat exchanger, a first heat exchanger, a first fluid driving device, a second fluid driving device, a heat exchange device for a heating device, a second heat exchanger, a heating device and an air conditioning box, wherein the first heat exchanger comprises a first heat exchange part and a second heat exchange part, the first heat exchange part is not connected to the second heat exchange part, and the second heat exchanger and the indoor heat exchanger are located in the air conditioning box;

[0006] The thermal management system has a first auxiliary heating mode. In the first auxiliary heating mode, the compressor, the indoor heat exchanger, the first flow regulating device, the outdoor heat exchanger and the first heat exchange part are connected to form a loop, the first fluid driving device, the heating device and the second heat exchanger are connected to form a loop, the second fluid driving device, the heat exchange device of the heating device and the second heat exchange part are connected to form a loop, the first flow regulating device is in a throttling state, the heating device is in an open state, the outlet of the indoor heat exchanger is connected to the inlet of the first flow regulating device, the outlet of the first flow regulating device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first heat exchange part, and the first heat exchange part exchanges heat with the second heat exchange part.

[0007] In the thermal management system of the present application, in the first auxiliary heating mode, the outlet of the indoor heat exchanger is connected to the inlet of the first flow regulating device, the outlet of the first flow regulating device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first heat exchange part, the second fluid driving device, the heat exchange device of the heating device, and the second heat exchange part are connected to form a loop, and the first heat exchange part and the second heat exchange part exchange heat. When the thermal management system operates in the first auxiliary heating mode, the heat exchange medium flowing out of the first flow regulating device flows through the outdoor heat exchanger and the first heat exchange part in sequence, and all the heat exchange medium flows through the outdoor heat exchanger and absorbs heat from the atmospheric environment, and then flows through the first heat exchange part. If there is waste heat in the heat exchange device of the heating device, the waste heat can be recovered to improve the heating effect. If there is no waste heat, the impact on the heating effect is small, thereby ensuring the stability of the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a connection diagram of an embodiment of a thermal management system of the present application;

[0009] Figure 2 is a connection diagram of a first cooling mode of an embodiment of a thermal management system of the present application;

[0010] Figure 3 is a connection diagram of a second cooling mode of an embodiment of a thermal management system of the present application;

[0011] Figure 4 is a connection diagram of a third cooling mode of an embodiment of a thermal management system of the present application;

[0012] Figure 5 is a connection diagram of a first heating mode of an embodiment of a thermal management system of the present application;

[0013] Figure 6 is a connection diagram of a second heating mode of an embodiment of a thermal management system of the present application;

[0014] Figure 7 is a connection diagram of a third heating mode of an embodiment of a thermal management system of the present application;

[0015] Figure 8 is a connection diagram of a heating and dehumidification mode of an embodiment of a thermal management system of the present application;

[0016] Fig. 9 is a connection diagram of a first defrost mode of an embodiment of a thermal management system of the present application;

[0017] Fig.10 is a connection diagram of a second defrost mode of an embodiment of a thermal management system of the present application;

[0018] Fig.11 is a connection diagram of a first auxiliary heating mode of an embodiment of a thermal management system of the present application;

[0019] Fig.12 is a connection diagram of a second auxiliary heating mode of an embodiment of a thermal management system of the present application;

[0020] Fig.13 is a connection diagram of another embodiment of the thermal management system of the present application;

[0021] Fig.14 is a connection diagram of another embodiment of the thermal management system of the present application;

[0022] Fig.15 This is the structural intention of another embodiment of the first flow direction regulating device of the present application;

[0023] Fig.16 It is a partial structural intention of an embodiment of the parallel flow liquid-cooled heat exchanger of the present application;

[0024] Fig.17 This is a schematic cross-sectional view of an embodiment of the gas-liquid separation device of the present application. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0026] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0027] It should be understood that the words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the presence of at least one; "plurality" indicates a quantity of two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for convenience of description and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects.

[0028] The thermal management system of the exemplary embodiment of the present application is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations may complement or be combined with each other.

[0029] According to a specific embodiment of the thermal management system of the present application, Figure 1 As shown, the thermal management system includes a third heat exchanger 5 and a first heat exchanger 6. The third heat exchanger 5 includes a third heat exchange part 51 and a fourth heat exchange part 52. The third heat exchange part 51 and the fourth heat exchange part 52 can perform heat exchange. The third heat exchange part 51 and the fourth heat exchange part 52 are both provided with flow channels. The flow channels of the third heat exchange part 51 and the fourth heat exchange part 52 are isolated from each other and are not connected. The first heat exchanger 6 includes a first heat exchange part 61 and a second heat exchange part 62. The first heat exchange part 61 and the second heat exchange part 62 can perform heat exchange. The first heat exchange part 61 and the second heat exchange part 62 are both provided with flow channels. The flow channels of the first heat exchange part 61 and the second heat exchange part 62 are isolated from each other and are not connected. The refrigerant can perform heat exchange with the coolant through the third heat exchanger 5 and the first heat exchanger 6. The third heat exchanger 5 and the first heat exchanger 6 can be a plate heat exchanger, a parallel flow liquid-cooled heat exchanger or other liquid-cooled heat exchangers. The third heat exchanger 5 and the first heat exchanger 6 can be the same or different.

[0030] When the refrigerant is a high-pressure refrigerant (such as CO2 refrigerant), the third heat exchanger 5 and the first heat exchanger 6 are both parallel flow liquid cooling heat exchangers. Compared with plate heat exchangers, parallel flow liquid cooling heat exchangers have stronger pressure resistance and lower explosion risk. Fig.16The parallel flow liquid cooling heat exchanger comprises a plurality of microchannel flat tubes 100 arranged in parallel, a first current collector 200 connected to one end of the microchannel flat tubes 100, a second current collector 300 connected to the other end of the microchannel flat tubes 100, and a housing 400 surrounding the microchannel flat tubes 100 and located between the two current collectors. The refrigerant can flow into a cavity of the first current collector 200 on one side, and then flow through a part of the microchannel flat tubes 100 to the second current collector 300 on the other side, and then flow out of the other cavity of the first current collector 200 after passing through another part of the microchannel flat tubes 100. The cooling liquid flows in the cavity formed by the housing 400 and in the gap between the microchannel flat tubes 100, thereby realizing heat exchange between the refrigerant and the cooling liquid.

[0031] The various components of the thermal management system are connected to form two major systems, namely the refrigerant system and the coolant system, which are isolated from each other and not connected. Among them, the coolant system circulates the coolant, and the refrigerant circulates the refrigerant system. The refrigerant can be R134A or carbon dioxide or other heat exchange medium, and the coolant can be a mixed solution of ethanol and water or other cooling medium. Among them, the flow channel of the third heat exchange part 51 and the flow channel of the first heat exchange part 61 are connected to the refrigerant system, and the flow channel of the fourth heat exchange part 52 and the flow channel of the second heat exchange part 62 are connected to the coolant system.

[0032] It should be explained that the “flow channel of the third heat exchange part 51 and the flow channel of the first heat exchange part 61 are connected to the refrigerant system” here means that the refrigerant system includes the third heat exchange part 51 and the first heat exchange part 61, and the refrigerant in the refrigerant system can flow into and out of the flow channel of the third heat exchange part 51 and the flow channel of the first heat exchange part 61. The third heat exchange part 51 and the first heat exchange part 61 can be connected to the components in the refrigerant system through pipelines, and a loop is formed after being connected through the pipelines when the thermal management system is working. In the same way, the flow channel of the fourth heat exchange part 52 and the flow channel of the second heat exchange part 62 are connected to the coolant system, refer to the above explanation.

[0033] In this embodiment, the refrigerant system includes: a compressor 1, an indoor heat exchanger, an outdoor heat exchanger 103, a third heat exchange part 51, a first heat exchange part 61, a fourth heat exchanger 7, a second flow regulating device 2, a first flow regulating device 3, a third flow regulating device 4, a first valve 201, a second valve 202, a third valve 203, a fourth valve 204, a fifth valve 205, a sixth valve 206 and a gas-liquid separator 10, and the indoor heat exchanger includes a first indoor heat exchanger 101 and a second indoor heat exchanger 102. The above-mentioned components can be indirectly connected through pipes or valves.

[0034] The fourth heat exchanger 7 includes a fifth heat exchange part 71 and a sixth heat exchange part 72. The fifth heat exchange part 71 and the sixth heat exchange part 72 can perform heat exchange. The fifth heat exchange part 71 and the sixth heat exchange part 72 are both provided with flow channels. The flow channels of the fifth heat exchange part 71 and the flow channels of the sixth heat exchange part 72 are isolated from each other and are not connected in the fourth heat exchanger 7. The flow channels of the fifth heat exchange part 71 and the flow channels of the sixth heat exchange part 72 are respectively connected to the refrigerant system. Refrigerant flows through both the fifth heat exchange part 71 and the sixth heat exchange part 72, but refrigerant of different sections in the heat management system flows. The flow channel of the sixth heat exchange part 72 is connected between the outlet of the gas-liquid separator 10 and the inlet of the compressor 1, and can be used to increase the temperature of the refrigerant entering the compressor 1, thereby reducing the liquid hammer phenomenon of the compressor 1. In the cooling mode, the flow channel of the fifth heat exchange part 71 is connected between the outlet of the outdoor heat exchanger 103 and the inlet of the second flow regulating device 2 or the inlet of the first flow regulating device 3, which can be used to reduce the temperature of the refrigerant before throttling, thereby improving the cooling effect.

[0035] The refrigerant system comprises a first branch A1, a second branch A2, a third branch A3 and a fourth branch A4, wherein the first branch A1 and the second branch A2 are arranged in parallel.

[0036] The first indoor heat exchanger 101, the third flow regulating device 4, the second indoor heat exchanger 102 and the first flow regulating device 3 are arranged in the first branch A1, the first branch A1 has a first end and a second end, and the first indoor heat exchanger 101, the third flow regulating device 4, the second indoor heat exchanger 102 and the first flow regulating device 3 are arranged in sequence from the first end of the first branch A1 to the second end of the first branch A1. That is, the first port of the first indoor heat exchanger 101 is close to the first end of the first branch A1, the second port of the first indoor heat exchanger 101 is connected to the first port of the third flow regulating device 4, the second port of the third flow regulating device 4 is connected to the first port of the second indoor heat exchanger 102, the second port of the second indoor heat exchanger 102 is connected to the first port of the first flow regulating device 3, and the second port of the first flow regulating device 3 is close to the second end of the first branch A1.

[0037] The third valve 203, the third heat exchange part 51 and the second flow regulating device 2 are arranged in the second branch A2, the second branch A2 has a first end and a second end, and the third valve 203, the third heat exchange part 51 and the second flow regulating device 2 are arranged in sequence from the first end of the second branch A2 to the second end of the second branch A2. That is, the first port of the third valve 203 is close to the first end of the second branch A2, the second port of the third valve 203 is connected to the first port of the third heat exchange part 51, the second port of the third heat exchange part 51 is connected to the first port of the second flow regulating device 2, and the second port of the second flow regulating device 2 is close to the second end of the second branch A2.

[0038] The first valve 201 is disposed on the third branch A3, and the third branch A3 has a first end and a second end. The first end of the third branch A3 is connected between the second port of the first indoor heat exchanger 101 and the first port of the third flow regulating device 4, and the second end of the third branch A3 is connected to the second port of the outdoor heat exchanger 103. The first port of the first valve 201 is close to the first end of the third branch A3, and the second port of the first valve 201 is close to the second end of the third branch A3. In some other embodiments, the first end of the third branch A3 can also be connected between the first port of the second indoor heat exchanger 102 and the second port of the third flow regulating device 4.

[0039] The second valve 202 is disposed on the fourth branch A4, and the fourth branch A4 has a first end and a second end. The first end of the fourth branch A4 is connected between the second port of the third valve 203 and the first port of the third heat exchange part 51, and the second end of the third branch A3 is connected to the inlet of the gas-liquid separator 10. The first port of the second valve 202 is close to the first end of the fourth branch A4, and the second port of the second valve 202 is close to the second end of the fourth branch A4.

[0040] In the refrigerant system, the outlet of the compressor 1 is connected to the first port of the fifth valve 205 and the first port of the sixth valve 206, the second port of the fifth valve 205 is connected to a port of the first heat exchange part 61 and the second port of the fourth valve 204, the other port of the first heat exchange part 61 is connected to the second port of the outdoor heat exchanger 103 and the second port of the first valve 201, and the second port of the sixth valve 206 is connected to the first end of the first branch A1 and the first end of the second branch A2. The second end of the first branch A1 and the second end of the second branch A2 are both connected to a port of the fifth heat exchange part 71, and the other port of the fifth heat exchange part 71 is connected to the first port of the outdoor heat exchanger 103. The second port of the fourth valve 204 and the second port of the second valve 202 are both connected to the inlet of the gas-liquid separator 10, the outlet of the gas-liquid separator 10 is connected to a port of the sixth heat exchange part 72, and the other port of the sixth heat exchange part 72 is connected to the inlet of the compressor 1.

[0041] The first valve 201, the second valve 202, the third valve 203, the fourth valve 204, the fifth valve 205 and the sixth valve 206 all have a conducting function and a shutoff function. Optionally, the first valve 201, the second valve 202, the third valve 203, the fourth valve 204, the fifth valve 205 and the sixth valve 206 are all shutoff valves. Of course, the first valve 201, the second valve 202, the third valve 203, the fourth valve 204, the fifth valve 205 and the sixth valve 206 can also be other types of valves with a conducting function and a shutoff function. The types of valves of the first valve 201, the second valve 202, the third valve 203, the fourth valve 204, the fifth valve 205 and the sixth valve 206 can be the same or different, and this application is not limited thereto.

[0042] The second flow regulating device 2 has at least a cut-off function and a two-way throttling function, and the first flow regulating device 3 and the third flow regulating device 4 have at least a conduction function, a cut-off function and a two-way throttling function. Optionally, the second flow regulating device 2, the first flow regulating device 3 and the third flow regulating device 4 are all electronic expansion valves. Of course, the second flow regulating device 2, the first flow regulating device 3 and the third flow regulating device 4 can also be other types of valves or a combination of valves, and the types of the three can be the same or different, and this application is not limited. By adjusting the working states of the first valve 201, the second valve 202, the third valve 203, the fourth valve 204, the fifth valve 205, the sixth valve 206, the second flow regulating device 2, the first flow regulating device 3 and the third flow regulating device 4, the switching of different working conditions of the refrigerant system can be realized, and at least the functions of heating, cooling, heating dehumidification and defrosting can be realized.

[0043] In some embodiments, the gas-liquid separator 10 and the fourth heat exchanger 7 can be integrated together to form a gas-liquid separation device, which has both the gas-liquid separation function of the gas-liquid separator 10 and the heat exchange function of the fourth heat exchanger 7. Fig.17 The gas-liquid separation device includes an inner cylinder 301, an outer cylinder 302, a gas-liquid separation component 303 and a heat exchange component 304. The gas-liquid separation component 303 is at least partially located in the inner cavity of the inner cylinder 301, and the heat exchange component 304 is at least partially located in the interlayer cavity formed by the inner cylinder 301 and the outer cylinder 302. The gas-liquid separation device includes a first inlet 305, a second inlet 307, a first outlet 306 and a second outlet 308. The gas-liquid separation component 303 is used to perform gas-liquid separation on the refrigerant flowing into the first inlet 305. The liquid refrigerant after gas-liquid separation is stored in the inner cylinder 301. The gas refrigerant flows into the interlayer cavity and exchanges heat with the heat exchange component 304 and then flows out of the gas-liquid separation device from the first outlet 306. One of the second inlet 307 and the second outlet 308 is the inlet of the heat exchange component 304, and the other is the outlet of the heat exchange component 304. The refrigerant flows in the inner cavity of the heat exchange component 304. In this embodiment, the first inlet 305 is connected to the second port of the fourth valve 204 and the second port of the second valve 202, the first outlet 306 is connected to the inlet of the compressor 1, the second inlet 307 is connected to the first port of the outdoor heat exchanger 103, and the second outlet 308 is connected to the second end of the first branch A1 and the second end of the second branch A2.

[0044] The coolant system includes: a first fluid driving device 11, a second fluid driving device 12, a third fluid driving device 13, a fourth heat exchange part 52, a second heat exchange part 62, a second heat exchanger 104, a fifth heat exchanger 105, a battery heat exchange device 106, a motor heat exchange device 107, a heating device 108, a first flow direction regulating device 8 and a second flow direction regulating device 9. The above components can be indirectly connected through pipelines or valves.

[0045] The first flow direction regulating device 8 includes a first connection port 81, a second connection port 82, a third connection port 83, a fourth connection port 84 and a fifth connection port 85. In the present embodiment, the first flow direction regulating device 8 includes a valve body and a valve core. The first connection port 81, the second connection port 82, the third connection port 83, the fourth connection port 84 and the fifth connection port 85 are not connected on the surface of the valve body. The valve core is arranged inside the valve body and can move inside the valve body, so as to adjust the connection and cutoff conditions between the first connection port 81, the second connection port 82, the third connection port 83, the fourth connection port 84 and the fifth connection port 85. Optionally, the second flow direction regulating device 9 is a five-way valve. In some other embodiments, the second flow direction regulating device 9 can be a combination of multiple valve components.

[0046] The first flow direction regulating device 8 has a first working state, a second working state, a third working state and a fourth working state, and the valve core can control the first flow direction regulating device 8 to be in one of the first working state, the second working state, the third working state and the fourth working state. When the first flow direction regulating device 8 is in the first working state, the first connection port 81 is connected to the second connection port 82, and the third connection port 83 is connected to the fourth connection port 84. When the first flow direction regulating device 8 is in the second working state, the first connection port 81 is connected to the fourth connection port 84, and the second connection port 82 is connected to the third connection port 83. When the first flow direction regulating device 8 is in the third working state, the first connection port 81 is connected to the second connection port 82, and the fourth connection port 84 is connected to the fifth connection port 85. When the first flow direction regulating device 8 is in the fourth working state, the first connection port 81 is connected to the fourth connection port 84, and the second connection port 82 is connected to the fifth connection port 85.

[0047] The second flow direction regulating device 9 includes a sixth connection port 91, a seventh connection port 92, an eighth connection port 93 and a ninth connection port 94. The second flow direction regulating device 9 has a first working mode and a second working mode. In the first working mode, the sixth connection port 91 is connected to the seventh connection port 92, and the eighth connection port 93 is connected to the ninth connection port 94. In the second working mode, the sixth connection port 91 is connected to the ninth connection port 94, and the eighth connection port 93 is connected to the seventh connection port 92. Optionally, the second flow direction regulating device 9 is a four-way valve, or a combination of multiple stop valves.

[0048] The coolant system includes a first flow direction regulating device 8, a first flow path B1 and a second flow path, wherein the second flow path includes a second flow direction regulating device 9, a first sub-flow path B2, a second sub-flow path B3, a third sub-flow path B4 and a fourth sub-flow path B5.

[0049] The first fluid driving device 11, the heating device 108 and the second heat exchanger 104 are arranged in the first flow path B1, and the outlet of the heating device 108 is connected to the inlet of the second heat exchanger 104. The third fluid driving device 13, the battery heat exchange device 106 and the fourth heat exchange part 52 are arranged in the first sub-flow path B2, and the outlet of the fourth heat exchange part 52 is connected to the inlet of the battery heat exchange device 106. The second fluid driving device 12, the motor heat exchange device 107 and the second heat exchange part 62 are arranged in the second sub-flow path B3, and the outlet of the motor heat exchange device 107 is connected to the inlet of the second heat exchange part 62. The fifth heat exchanger 105 is arranged in the third sub-flow path B4, and the fourth sub-flow path B5 is a circulation pipeline.

[0050] The first port of the first flow path B1 is connected to the first connection port 81, and the second port of the first flow path B1 is connected to the second connection port 82. The first port of the first sub-flow path B2 is connected to the sixth connection port 91, and the second port of the first sub-flow path B2 is connected to the seventh connection port 92. The first port of the second sub-flow path B3 is connected to the eighth connection port 93, and the second port of the second sub-flow path B3 is connected to the fourth connection port 84. The first port of the third sub-flow path B4 is connected to the fifth connection port 85, and the second port of the third sub-flow path B4 is connected to the ninth connection port 94. The first port of the fourth sub-flow path B5 is connected to the third connection port 83, and the second port of the fourth sub-flow path B5 is connected to the ninth connection port 94.

[0051] The heat generating device includes a motor and a battery, and the heat exchange device of the heat generating device includes a battery heat exchange device 106 and a motor heat exchange device 107. The motor heat exchange device 107 performs heat exchange with the motor for thermal management of the motor. The battery heat exchange device 106 performs heat exchange with the battery for thermal management of the battery. It should be understood that when the external environment is low, the motor and the battery are in a state where they need to be heated, but they will start to heat up after running for a period of time.

[0052] The first fluid driving device 11, the second fluid driving device 12 and the third fluid driving device 13 provide power for the flow of the coolant in the coolant system. Optionally, the first fluid driving device 11, the second fluid driving device 12 and the third fluid driving device 13 are electronic water pumps. The fifth heat exchanger 105 is an air-cooled heat exchanger for heat exchange with air. Optionally, the fifth heat exchanger 105 is a low-temperature water tank. The structure of the low-temperature water tank is well known to those skilled in the art and will not be described in detail in this application. The heating device 108 is used to heat the coolant. Optionally, the heating device 108 is a liquid-cooled PTC electric heater.

[0053] By adjusting the working states of the first flow direction regulating device 8 and the second flow direction regulating device 9, the connection relationship between the first flow path B1, the first sub-flow path B2, the second sub-flow path B3, the third sub-flow path B4 and the fourth sub-flow path B5 can be switched. The first flow path B1 and the first sub-flow path B2 can form small loops separately.

[0054] The thermal management system provided in the embodiment of the present application can be applied to electric vehicles. The electric vehicles have an air conditioning box 109 for exchanging heat with the air in the passenger compartment. The first indoor heat exchanger 101, the second indoor heat exchanger 102 and the second heat exchanger 104 are arranged in the air conditioning box 109. The first indoor heat exchanger 101 is located on the downstream side of the air flow relative to the second indoor heat exchanger 102, and the second heat exchanger 104 is located on the downstream side of the air flow relative to the first indoor heat exchanger 101. A fan is arranged in the air conditioning box 109 for guiding the flow of air in the air conditioning box 109. The front-end module composed of the outdoor heat exchanger 103, the fifth heat exchanger 105 and the fan device is arranged near the front air intake grille of the vehicle. The fifth heat exchanger 105 is located on the downstream side of the air flow relative to the outdoor heat exchanger 103, and the fan device is used to guide the flow of air.

[0055] The thermal management system of this embodiment has multiple working modes, including heating mode, cooling mode, heating and dehumidification mode, auxiliary heating mode, battery preheating mode, battery cooling mode, defrosting mode and other heat dissipation modes, etc. The thermal management system of this embodiment is not only applicable to vehicles, but also to other heat exchange systems that require thermal management. For the convenience of description, the specification of this application takes vehicles as an example for explanation.

[0056] like Figures 2 to 4 As shown, when the atmospheric ambient temperature is high, depending on whether the passenger compartment and the battery have cooling requirements, the thermal management system has the operating conditions of cooling the passenger compartment alone, cooling the battery alone, or cooling the passenger compartment and the battery simultaneously.

[0057] Reference Figure 2 , when only the passenger compartment has a cooling demand, the thermal management system is in the first cooling mode. The compressor 1 is turned on, the refrigerant system is in a working state, the first valve 201, the fourth valve 204 and the sixth valve 206 are in a cut-off state, the second valve 202, the third valve 203 and the fifth valve 205 are in a conducting state, the second flow regulating device 2 is in a cut-off state, the first flow regulating device 3 is in a throttling state, and the third flow regulating device 4 is in a conducting state. The compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the first flow regulating device 3, the second indoor heat exchanger 102, the third flow regulating device 4, the second indoor heat exchanger 102, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit.

[0058] At this time, the coolant system adjusts the working state of the first flow direction regulating device 8 and the second flow direction regulating device 9 according to whether the motor and the battery have heat dissipation requirements. When only the motor has heat dissipation requirements, the first flow direction regulating device 8 is in the third working state, the second flow direction regulating device 9 is in the first working mode, and the first fluid driving device 11 and the third fluid driving device 13 may not work. The second fluid driving device 12, the motor heat exchange device 107, the second heat exchange part 62 and the fifth heat exchanger 105 are connected to form a coolant loop, and the heat of the motor is released into the atmosphere through the fifth heat exchanger 105. When both the battery and the motor have heat dissipation requirements, the fifth heat exchanger 105 is used to control the heat dissipation of the motor. Figure 2 , the first flow direction regulating device 8 is in the third working state, the second flow direction regulating device 9 is in the second working mode, and the first fluid driving device 11 may not work. The fourth heat exchange part 52, the third fluid driving device 13, the battery heat exchange device 106, the second fluid driving device 12, the motor heat exchange device 107, the second heat exchange part 62 and the fifth heat exchanger 105 are connected to form a coolant loop, and the heat of the battery and the motor is released to the atmosphere through the fifth heat exchanger 105. The refrigerant exchanges heat with the coolant in the coolant system through the first heat exchanger 6.

[0059] The high-temperature refrigerant compressed by the compressor 1 flows into the first heat exchange part 61. The high-temperature refrigerant in the first heat exchange part 61 transfers heat to the coolant in the second heat exchange part 62. The circulation of the coolant in the coolant system takes away part of the heat of the refrigerant. Then the refrigerant flows into the outdoor heat exchanger 103. After heat exchange with the air, the temperature of the refrigerant is reduced again. The refrigerant flowing out of the outdoor heat exchanger 103 flows to the first branch A1. The refrigerant enters the first branch A1, and after throttling by the first flow regulating device 3, it flows through the second indoor heat exchanger 102 and the first indoor heat exchanger 101 in turn. The first indoor heat exchanger 101 and the second indoor heat exchanger 102 are used as evaporators. The refrigerant exchanges heat with the air in the passenger compartment air conditioner 109, thereby achieving cooling of the passenger compartment. The refrigerant flowing out of the first branch A1 flows through the gas-liquid separator 10 and the sixth heat exchange part 72 in turn, and then returns to the compressor 1, and the cycle continues.

[0060] The gas-liquid separator 10 is used to separate the refrigerant in the gas-liquid two-phase state into gaseous refrigerant and liquid refrigerant, the liquid refrigerant is stored in the gas-liquid separator 10, and the gaseous refrigerant flows to the compressor 1. In some embodiments, if a liquid storage tank is provided in the compressor 1 or the refrigerant flowing into the compressor 1 is all in gaseous state, the gas-liquid separator 10 may not be provided, and the refrigerant directly returns to the compressor 1.

[0061] Reference Figure 3, when both the passenger compartment and the battery have cooling requirements, the thermal management system is in the second cooling mode. The compressor 1 is turned on, the refrigerant system is in the working state, the first valve 201, the fourth valve 204 and the sixth valve 206 are in the cut-off state, the second valve 202, the third valve 203 and the fifth valve 205 are in the conducting state, the second flow regulating device 2 and the first flow regulating device 3 are in the throttling state, and the third flow regulating device 4 is in the conducting state. The compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the first flow regulating device 3, the second indoor heat exchanger 102, the third flow regulating device 4, the first indoor heat exchanger 101, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit, and the compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the second flow regulating device 2, the third heat exchange part 51, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit.

[0062] At this time, the first flow direction regulating device 8 in the coolant system is in the third working state, and the second flow direction regulating device 9 is in the first working mode. The second fluid driving device 12, the motor heat exchange device 107, the second heat exchange part 62 and the fifth heat exchanger 105 are connected to form a coolant circuit, and the refrigerant exchanges heat with the coolant in the coolant system through the first heat exchanger 6, and the heat of the motor is released to the atmosphere through the fifth heat exchanger 105. The third fluid driving device 13, the battery heat exchange device 106 and the fourth heat exchange part 52 are connected to form a coolant circuit, and the refrigerant exchanges heat with the coolant in the coolant system through the third heat exchanger 5.

[0063] Compared with the first cooling mode, the second cooling mode is different in that the refrigerant flowing out of the outdoor heat exchanger 103 in the refrigerant system is divided into two paths, one flowing to the first branch A1, and the other flowing to the second branch A2. The refrigerant enters the first branch A1, and after being throttled by the first flow regulating device 3, it flows through the second indoor heat exchanger 102 and the first indoor heat exchanger 101 in sequence. The first indoor heat exchanger 101 and the second indoor heat exchanger 102 are used as evaporators. The refrigerant exchanges heat with the air in the passenger compartment air conditioner 109, thereby achieving passenger compartment cooling. The refrigerant enters the second branch A2, and after being throttled by the second flow regulating device 2, it flows into the third heat exchange part 51. The refrigerant in the third heat exchange part 51 exchanges heat with the coolant in the fourth heat exchange part 52, so that the temperature of the coolant is reduced. Through the circulation of the coolant, the purpose of cooling the battery is achieved. The refrigerant flowing out of the first branch A1 and the refrigerant flowing out of the second branch A2 flow through the gas-liquid separator 10 and the sixth heat exchange part 72, and then return to the compressor 1, and the cycle continues. In this mode, the battery can be cooled by the refrigerant, and a good cooling effect can be achieved. The similarities between the second refrigeration mode and the first refrigeration mode are not repeated here, and the above description can be referred to.

[0064] Reference Figure 4 , when only the batteries have cooling requirements, the thermal management system is in the third cooling mode. The compressor 1 is turned on, the refrigerant system is in working state, the first valve 201, the fourth valve 204 and the sixth valve 206 are in the cut-off state, the second valve 202, the third valve 203 and the fifth valve 205 are in the on state, at least one of the third flow regulating device 4 and the first flow regulating device 3 is in the cut-off state, and the second flow regulating device 2 is in the throttling state. The compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the second flow regulating device 2, the third heat exchange part 51, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit. At this time, the flow state of the coolant in this mode is the same as the flow principle of the coolant in the second cooling mode. Please refer to the above description and will not be repeated here.

[0065] Compared with the second refrigeration mode, the third refrigeration mode is different in that all the refrigerant flowing out of the outdoor heat exchanger 103 in the refrigerant system flows to the second branch A2, flows into the third heat exchange part 51 after being throttled by the second flow regulating device 2, and the refrigerant in the third heat exchange part 51 exchanges heat with the coolant in the fourth heat exchange part 52 to reduce the temperature of the coolant, and the purpose of cooling the battery is achieved through the circulation of the coolant. The refrigerant flowing out of the second branch A2 flows through the gas-liquid separator 10 and the sixth heat exchange part 72 in turn, and then returns to the compressor 1, and the cycle continues. In this mode, the refrigerant can be used to cool the battery, and a better cooling effect can be achieved. The similarities between the second refrigeration mode and the first refrigeration mode are not repeated here, and the above description can be referred to.

[0066] In the first cooling mode, the second cooling mode and the third cooling mode of the thermal management system of the present application, the temperature of the refrigerant is reduced twice before flowing to the first branch A1 or the second branch A2 through the action of the first heat exchanger 6 and the outdoor heat exchanger 103, so that the refrigerant after throttling by the second flow regulating device 2 or the first flow regulating device 3 has a lower temperature, so that the refrigerant in the first branch A1 can absorb more heat from the air at the first indoor heat exchanger 101 and the second indoor heat exchanger 102, or the refrigerant in the second branch A2 can absorb the heat of the coolant at the third heat exchange part 51, thereby improving the cooling effect. In addition, the first indoor heat exchanger 101 and the second indoor heat exchanger 102 are both used as evaporators, and compared with the structure with only one indoor heat exchanger, the two indoor heat exchangers can improve the cooling capacity.

[0067] like Figures 5 to 7 As shown, when the ambient temperature is low, the thermal management system has the operating conditions of heating the passenger compartment alone, heating the battery alone, or heating the passenger compartment and the battery at the same time, depending on whether the passenger compartment and the battery need to be heated.

[0068] Reference Figure 5 , when only the passenger compartment has a heating demand, the thermal management system is in the first heating mode. The compressor 1 is turned on, the refrigerant system is in a working state, the first valve 201, the second valve 202 and the fifth valve 205 are in a cut-off state, the fourth valve 204 and the sixth valve 206 are in a conducting state, the third valve 203 and at least one of the second flow regulating device 2 are in a cut-off state, the first flow regulating device 3 is in a throttling state, and the third flow regulating device 4 is in a conducting state. The compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the first flow regulating device 3, the first indoor heat exchanger 101, the third flow regulating device 4, the second indoor heat exchanger 102, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit.

[0069] At this time, the flow state of the coolant in this mode is roughly the same as the flow principle of the coolant in the first refrigeration mode. The similarities can be referred to the above description and will not be repeated here. The difference is that at this time, the first flow direction regulating device 8 is in the first working state, and the waste heat of the motor or the waste heat of the motor and the battery is recovered to the refrigerant system through the first heat exchanger 6. However, when the waste heat of the coolant system is large, the first flow direction regulating device 8 can be switched to the third working state, and the waste heat after waste heat recovery is released into the atmosphere through the fifth heat exchanger 105.

[0070] The high-temperature refrigerant compressed by the compressor 1 flows into the first branch A1, flows through the first indoor heat exchanger 101 and the second indoor heat exchanger 102 in sequence, and flows out of the first branch A1 after being throttled by the first flow regulating device 3. The first indoor heat exchanger 101 and the second indoor heat exchanger 102 are used as condensers, and the refrigerant exchanges heat with the air in the passenger compartment air conditioner 109, thereby achieving passenger compartment heating. The refrigerant flowing out of the first branch A1 flows through the fifth heat exchange part 71 and exchanges heat with the refrigerant in the sixth heat exchange part 72. Then the refrigerant flows through the outdoor heat exchanger 103 and the first heat exchange part 61 in sequence, absorbs the heat of the air through the outdoor heat exchanger 103, and then the refrigerant in the first heat exchange part 61 absorbs the heat of the coolant in the second heat exchange part 62, thereby achieving waste heat recovery. The refrigerant flowing out of the first heat exchange part 61 flows through the gas-liquid separator 10 and the sixth heat exchange part 72 in sequence, and then returns to the compressor 1, and the cycle continues.

[0071] Reference Figure 6, when both the passenger compartment and the battery have heating requirements, the thermal management system is in the second heating mode. The compressor 1 is turned on, the refrigerant system is in the working state, the first valve 201, the second valve 202 and the fifth valve 205 are in the cut-off state, the third valve 203, the fourth valve 204 and the sixth valve 206 are in the conducting state, the second flow regulating device 2 and the first flow regulating device 3 are in the throttling state, and the third flow regulating device 4 is in the conducting state. The compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the first flow regulating device 3, the first indoor heat exchanger 101, the third flow regulating device 4, the second indoor heat exchanger 102, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit. And the compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the second flow regulating device 2, the third heat exchange part 51, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit.

[0072] The flow state of the coolant in this mode is roughly the same as the flow principle of the coolant in the second refrigeration mode. The similarities can be referred to the above description and will not be repeated here. The difference is that at this time, the first flow direction regulating device 8 is in the first working state, and the heat of the motor is recovered to the refrigerant system through the first heat exchanger 6. Similarly, when the residual heat of the motor is large, the first flow direction regulating device 8 can be switched to the third working state, and the residual heat after the residual heat recovery is released to the atmosphere through the fifth heat exchanger 105.

[0073] The difference between the second heating mode and the first heating mode is that the refrigerant flowing out of the compressor 1 in the refrigerant system is divided into two paths, one flowing to the first branch A1 and the other flowing to the second branch A2. The refrigerant enters the first branch A1, flows through the first indoor heat exchanger 101, the second indoor heat exchanger 102 and the first flow regulating device 3 in sequence, and flows out of the first branch A1 after being throttled by the first flow regulating device 3. The first indoor heat exchanger 101 and the second indoor heat exchanger 102 are used as condensers. The refrigerant exchanges heat with the air in the passenger compartment air conditioner 109, thereby achieving passenger compartment heating. The refrigerant enters the second branch A2, flows through the third heat exchange part 51 and the second flow regulating device 2 in sequence, and flows out of the second branch A2 after being throttled by the second flow regulating device 2. The refrigerant in the third heat exchange part 51 exchanges heat with the coolant in the fourth heat exchange part 52, so that the temperature of the coolant increases, and the purpose of heating the battery is achieved through the circulation of the coolant. The refrigerant flowing out of the first branch A1 and the refrigerant flowing out of the second branch A2 flow through the fifth heat exchange part 71, the outdoor heat exchanger 103, the first heat exchange part 61, the gas-liquid separator 10 and the sixth heat exchange part 72, and then return to the compressor 1, and the cycle continues. In this mode, the battery heating can be achieved through the refrigerant system, and a better heating effect can be achieved. The similarities between the second heating mode and the first heating mode are not repeated here, and the above description can be referred to.

[0074] Reference Figure 7 When only the battery has a heating demand, the thermal management system is in the third heating mode. The connection state of the refrigerant system and the coolant system in the third heating mode is roughly the same as the connection state of the refrigerant system and the coolant system in the second heating mode. For the similarities, please refer to the relevant description of the second heating mode, which will not be repeated here.

[0075] The difference between the third heating mode and the second heating mode is that at least one of the third flow regulating device 4 and the first flow regulating device 3 is in the cut-off state. The compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the second flow regulating device 2, the third heat exchange part 51, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit. The refrigerant flowing out of the compressor 1 in the refrigerant system all flows to the second branch A2, flows through the third heat exchange part 51 and the second flow regulating device 2 in turn, flows out of the second branch A2 after being throttled by the second flow regulating device 2, and the refrigerant in the third heat exchange part 51 exchanges heat with the coolant in the fourth heat exchange part 52, so that the temperature of the coolant increases, and the purpose of heating the battery is achieved through the circulation of the coolant. The refrigerant flowing out of the second branch A2 flows through the fifth heat exchange part 71, the outdoor heat exchanger 103, the first heat exchange part 61, the gas-liquid separator 10 and the sixth heat exchange part 72 in turn, and then returns to the compressor 1, and the cycle is repeated.

[0076] In the first heating mode, the second heating mode and the third heating mode of the thermal management system of the present application, through the action of the first heat exchanger 6 and the outdoor heat exchanger 103, the refrigerant can absorb the heat of the atmospheric environment, and can also recover the waste heat of the coolant system, enrich the heat source, and improve the heating effect. In addition, when the outdoor heat exchanger 103 is frosted, if there is sufficient waste heat in the coolant system, there is no need to run the defrost mode. The first heat exchanger 6 is used as a condenser and the outdoor heat exchanger 105 is used as a pipeline, which is beneficial to improve the stability of the system. The first indoor heat exchanger 101 and the second indoor heat exchanger 102 are both used as condensers to improve the heating capacity.

[0077] In winter, when the ambient temperature is low and the temperature inside the passenger compartment is high, the temperature inside the passenger compartment differs greatly from the ambient temperature outside the vehicle, and water mist or water droplets will condense on the windows, affecting the vision and posing a safety hazard when driving. The thermal management system of this embodiment has a heating and dehumidification mode. Figure 8 The flow state of the refrigerant in the heating and dehumidification mode is roughly the same as the flow state of the refrigerant in the first heating mode or the second heating mode. The similarities can be referred to the above description and will not be repeated here. At this time, the coolant system adjusts the working state of the first flow direction regulating device 8 and the second flow direction regulating device 9 according to whether the motor and the battery have heat dissipation requirements.

[0078] The difference between the heating and dehumidification mode and the first heating mode or the second heating mode is that the third flow regulating device 4 is in a throttling state, and the first flow regulating device 3 is in a throttling state or a conducting state. Specifically, the high-temperature refrigerant flowing into the first branch A1 flows through the first indoor heat exchanger 101 and the second indoor heat exchanger 102 in sequence. The first indoor heat exchanger 101 is used as a condenser, and the second indoor heat exchanger 102 is used as an evaporator. Since the first indoor heat exchanger 101 is located on the downwind side of the second indoor heat exchanger 102, the dry air dehumidified by the second indoor heat exchanger 102 is heated by the second indoor heat exchanger 102 and then blown into the passenger compartment, thereby achieving heating and dehumidification.

[0079] The thermal management system of the present application can switch from the first heating mode or the second heating mode to the heating and dehumidification mode by only switching the working state of the third flow regulating device 4, or only switching the working states of the first flow regulating device 3 and the third flow regulating device 4, and the system operation is simple.

[0080] When the passenger compartment needs to be heated, the thermal management system operates in the first heating mode or the second heating mode for a period of time. Due to the low outdoor ambient temperature and the outdoor heat exchanger 103 being used as an evaporator, the outdoor heat exchanger 103 may be frosted. After the outdoor heat exchanger 103 is frosted, the heat exchange performance of the outdoor heat exchanger 103 is reduced, affecting the normal operation of the thermal management system and the comfort of the passenger compartment. Fig. 9 and Fig.10As shown, according to the state of the outdoor heat exchanger 103, the thermal management system of this embodiment has a first defrost mode and a second defrost mode.

[0081] Reference Fig. 9 , when the outdoor heat exchanger 103 is about to frost or has already frosted, the thermal management system is in the first defrosting mode. The compressor 1 is turned on, the refrigerant system is in the working state, the third valve 203, the fourth valve 204 and the fifth valve 205 are in the cut-off state, the first valve 201, the second valve 202 and the sixth valve 206 are in the conducting state, the second flow regulating device 2 is in the throttling state, and at least one of the third flow regulating device 4 and the first flow regulating device 3 is in the cut-off state. The compressor 1, the first indoor heat exchanger 101, the outdoor heat exchanger 103, the fifth heat exchange part 71, the second flow regulating device 2, the third heat exchange part 51, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit.

[0082] At this time, the first flow direction regulating device 8 in the coolant system is in the first working state, and the second flow direction regulating device 9 is in the second working mode. The fourth heat exchange part 52, the third fluid driving device 13, the battery heat exchange device 106, the second fluid driving device 12, the motor heat exchange device 107 and the second heat exchange part 62 are connected to form a coolant loop, and the refrigerant exchanges heat with the coolant in the coolant system through the third heat exchanger 5, and the heat of the motor and the battery is recovered to the refrigerant system through the third heat exchanger 5.

[0083] The high-temperature refrigerant compressed by the compressor 1 flows into the first indoor heat exchanger 101, which is used as a condenser. The refrigerant exchanges heat with the air in the passenger compartment air conditioner 109, thereby heating the passenger compartment. Since the first valve 201 is in the on state, at least one of the first flow regulating device 3 and the third flow regulating device 4 is in the off state, and the refrigerant flowing out of the first indoor heat exchanger 101 flows into the outdoor heat exchanger 103 through the third branch A3. The outdoor heat exchanger 103 is used as a condenser, and the refrigerant releases heat to melt the frost outside the outdoor heat exchanger 103, thereby achieving defrosting. The refrigerant flowing out of the outdoor heat exchanger 103 flows through the fifth heat exchange part 71. Then, after being throttled by the second flow regulating device 2, it enters the third heat exchange part 51. The refrigerant in the third heat exchange part 51 recovers the heat of the coolant in the fourth heat exchange part 52, thereby achieving waste heat recovery. The refrigerant flowing out of the third heat exchange part 51 flows through the gas-liquid separator 10 and the sixth heat exchange part 72 in sequence, and then returns to the compressor 1, and the cycle continues.

[0084] In the first defrosting mode of the thermal management system of the present application, the high-temperature refrigerant discharged from the compressor 1 first flows into the first indoor heat exchanger 101 to ensure the heating effect of the passenger compartment. Then it flows into the outdoor heat exchanger 103, and the waste heat of the refrigerant after condensation and heat release is used to achieve the purpose of defrosting the outdoor heat exchanger 103, thereby reducing the heat loss caused by defrosting. Then the throttled refrigerant recovers the waste heat of the motor and battery in the coolant system through the third heat exchanger 5, thereby achieving effective utilization of the waste heat.

[0085] Reference Fig.10 , when the outdoor heat exchanger 103 is seriously frosted and needs to be defrosted quickly, the thermal management system also has a second defrosting mode. The compressor 1 is turned on, the refrigerant system is in a working state, the third valve 203, the fourth valve 204 and the sixth valve 206 are in a cut-off state, the first valve 201, the second valve 202 and the fifth valve 205 are in a conducting state, the second flow regulating device 2 is in a throttling state, and the first flow regulating device 3 and the third flow regulating device 4 are in a conducting state. The compressor 1, the first heat exchange part 61, the third flow regulating device 4, the second indoor heat exchanger 102, the first flow regulating device 3, the second flow regulating device 2, the third heat exchange part 51, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit. And the compressor 1, the first heat exchange part 61, the outdoor heat exchanger 103, the fifth heat exchange part 71, the second flow regulating device 2, the third heat exchange part 51, the gas-liquid separator 10 and the sixth heat exchange part 72 are connected to form a refrigerant circuit.

[0086] At this time, the flow state of the coolant in this mode is the same as the flow principle of the coolant in the first defrost mode. Please refer to the above description and will not be repeated here.

[0087] The high-temperature refrigerant compressed by the compressor 1 is divided into two paths, one of which flows to the outdoor heat exchanger 103, and the other flows into the second indoor heat exchanger 102 through the third branch A3. The refrigerant flows into the second indoor heat exchanger 102, which is used as a condenser. The refrigerant exchanges heat with the air in the passenger compartment air conditioner 109, thereby heating the passenger compartment. The refrigerant flows into the outdoor heat exchanger 103, which is used as a condenser. The refrigerant releases heat to melt the frost outside the outdoor heat exchanger 103. Since the refrigerant temperature is high at this time, rapid defrosting can be achieved. The refrigerant flowing out of the second indoor heat exchanger 102 and the refrigerant flowing out of the outdoor heat exchanger 103 flow to the second flow regulating device 2. Then, after being throttled by the second flow regulating device 2, it enters the third heat exchange part 51. The refrigerant in the third heat exchange part 51 recovers the heat of the coolant in the fourth heat exchange part 52, thereby recovering waste heat. The refrigerant flowing out of the third heat exchange part 51 flows through the gas-liquid separator 10 and the sixth heat exchange part 72 in sequence, and then returns to the compressor 1, and the cycle continues.

[0088] In the second defrosting mode of the thermal management system of the present application, the high-temperature refrigerant discharged from the compressor 1 is diverted to the outdoor heat exchanger 103 and the second indoor heat exchanger 102, which realizes heating of the passenger compartment on the one hand, and uses the high-temperature refrigerant to achieve rapid defrosting on the other hand. The throttled refrigerant recovers the waste heat of the motor and battery in the coolant system through the third heat exchanger 5, realizing effective utilization of the waste heat.

[0089] In the first defrost mode or the second defrost mode, if the residual heat of the motor and the battery in the coolant system is insufficient, the first flow direction regulating device 8 can be switched to the second working state, and the heating device 108 can be turned on. The fourth heat exchange part 52, the third fluid driving device 13, the battery heat exchange device 106, the second fluid driving device 12, the motor heat exchange device 107, the second heat exchange part 62, the first fluid driving device 11, the heating device 108 and the second heat exchanger 104 are connected to form a coolant loop. The heating device 108 is used to heat the coolant, and the second heat exchanger 104 is used to improve the heating effect, so as to ensure the heating effect during defrosting.

[0090] It is understandable that when the outdoor heat exchanger 103 has a defrosting demand, the thermal management system can use the first defrost mode and the second defrost mode in combination, so as to improve the defrosting efficiency and improve the system energy efficiency. For example, the first defrost mode can be run for a period of time, and then switched to the second defrost mode. Since the waste heat of the refrigerant flowing out of the first indoor heat exchanger 101 can be used to achieve defrosting when the first defrost mode is run, the heating effect on the passenger compartment side is not affected, but it has a certain defrosting effect, so the running time of the second defrost mode can be shortened and the defrosting efficiency can be improved. For example, the second defrost mode can be run for a period of time, and then switched to the first defrost mode. The second defrost mode is used to defrost more quickly to alleviate the frosting of the outdoor heat exchanger, and then switched to the first defrost mode, and the waste heat of the refrigerant is used to continue defrosting until the entire defrosting process is completed, thereby shortening the running time of the second defrost mode. Although the second defrost mode can achieve rapid defrosting, since a portion of the high-temperature refrigerant discharged from the compressor needs to be diverted to the outdoor heat exchanger for defrosting, the amount of refrigerant used for heating is reduced compared to the heating mode, which affects the heating effect on the passenger compartment side. Therefore, shortening the operating time of the second defrost mode can improve the energy efficiency of the thermal management system.

[0091] When the passenger compartment has a heating demand, the thermal management system can operate the first heating mode. When the outdoor ambient temperature is low, the outdoor heat exchanger 103 can absorb less heat, thereby affecting the heating effect of the passenger compartment. Fig.11 and Fig.12 As shown, according to whether the residual heat of the motor and the battery is sufficient, the thermal management system of this embodiment has a first auxiliary heating mode and a second auxiliary heating mode.

[0092] Reference Fig.11 When the waste heat of the motor and the battery in the coolant system is not sufficient, the thermal management system is in the first auxiliary heating mode. The compressor 1 is turned on, the refrigerant system is in working state, and the flow state of the refrigerant is the same as the flow principle of the refrigerant in the first heating mode. Please refer to the above description and will not be repeated here.

[0093] At this time, the first flow direction regulating device 8 in the coolant system is in the first working state, the heating device 108 is turned on, and the second flow direction regulating device 9 is in the second working mode. The third fluid driving device 13, the battery heat exchange device 106, the fourth heat exchange unit 52, the second fluid driving device 12, the motor heat exchange device 107 and the second heat exchange unit 62 are connected to form a coolant loop, and the refrigerant exchanges heat with the coolant in the coolant system through the first heat exchanger 6, and the heat of the motor and the battery is recovered to the refrigerant system through the first heat exchanger 6. The first fluid driving device 11, the heating device 108 and the second heat exchanger 104 are connected to form a loop, and the coolant heated by the heating device 108 flows into the second heat exchanger 104, and the second heat exchanger 104 exchanges heat with the air after passing through the first indoor heat exchanger 101 and the second indoor heat exchanger 102, and further heats the air before entering the passenger compartment, thereby ensuring the heating effect of the passenger compartment.

[0094] In the first auxiliary heating mode, all the heat generated by the heating device 108 is used for auxiliary heating, which reduces energy waste and effectively improves the heating effect. A small amount of waste heat from the motor and battery can be recovered into the refrigerant through the first heat exchanger 6.

[0095] Reference Fig.12 When the waste heat of the coolant system is sufficient, the thermal management system is in the second auxiliary heating mode, and the waste heat of the coolant system is used for auxiliary heating. The compressor 1 is turned on, and the refrigerant system is in working state. The flow state of the refrigerant is the same as the flow principle of the refrigerant in the first heating mode. Please refer to the above description and will not be repeated here.

[0096] At this time, the first flow direction regulating device 8 in the coolant system is in the second working state, and the second flow direction regulating device 9 is in the second working mode. The fourth heat exchange unit 52, the third fluid driving device 13, the battery heat exchange device 106, the second fluid driving device 12, the motor heat exchange device 107, the second heat exchange unit 62, the first fluid driving device 11, the heating device 108 and the second heat exchanger 104 are connected to form a loop. On the one hand, the refrigerant exchanges heat with the coolant in the coolant system through the first heat exchanger 6, and the heat of the motor and the battery is recovered to the refrigerant system through the first heat exchanger 6. On the other hand, the coolant flows into the second heat exchanger 104, and the second heat exchanger 104 exchanges heat with the air after passing through the first indoor heat exchanger 101 and the second indoor heat exchanger 102, further heating the air before entering the passenger compartment, thereby improving the heating effect of the passenger compartment.

[0097] In this embodiment, in the second auxiliary heating mode, the coolant flows in the order of the motor heat exchange device 107, the heating device 108, the second heat exchanger 104, and the battery heat exchange device 106. The heating device 108 can be turned on according to the demand for heat. The temperature of the motor is relatively high, and the high-temperature coolant flowing out of the motor heat exchange device 107 first flows into the second heat exchanger 104 for auxiliary heating, and then flows into the battery heat exchange device 106 for thermal management of the battery. By using the heat in a graded manner, the use of the heating device 108 can be reduced. If the heating device 108 is turned on, the high-temperature coolant flowing out of the motor heat exchange device 107 first flows through the heating device 108 to be heated, and then flows into the second heat exchanger 104, which can reduce the operating power of the heating device 108 and improve the thermal management efficiency of the vehicle.

[0098] When the passenger compartment needs to be heated but the required temperature is not high, the third auxiliary heating mode can be operated, and the passenger compartment can be heated by using at least one of the residual heat of the motor, the residual heat of the battery, and the heating device 108, which can save energy. Specifically, in the third auxiliary heating mode, the compressor 1 is turned off, and the connection state of the coolant system is the same as the first auxiliary heating mode or the second auxiliary heating mode, and the passenger compartment is heated by using the heating device 108 to heat the coolant, using the residual heat of the motor, and using at least one of the residual heat of the motor.

[0099] According to the temperature status of the motor and the battery, combined with the heating demand of the passenger compartment, switching can be performed among the first auxiliary heating mode, the second auxiliary heating mode and the third auxiliary heating mode to meet the heating demand of the passenger compartment, reasonably utilize the waste heat of the heating equipment, reduce the use of the heating device 108, or reduce the operating power of the heating device 108, thereby achieving the purpose of saving energy.

[0100] When there is no heating and cooling demand in the passenger compartment, the compressor 1 can be turned off to save energy. The thermal management system controls the working state of the first flow direction regulating device 8 and the second flow direction regulating device 9 in the coolant system according to the state of the motor and the battery, so as to perform thermal management on the motor and the battery. For example, the first flow direction regulating device 8 is in the third working state, the second flow direction regulating device 9 is in the first working mode, and the fifth heat exchanger 105 is used to dissipate heat for the motor. Alternatively, the first flow direction regulating device 8 is in the third working state, the second flow direction regulating device 9 is in the second working mode, and the fifth heat exchanger 105 is used to dissipate heat for both the motor and the battery. Alternatively, the first flow direction regulating device 8 is in the first working state, the second flow direction regulating device 9 is in the second working mode, and the residual heat of the motor is used to heat the battery. Alternatively, the first flow direction regulating device 8 is in the second working state, the second flow direction regulating device 9 is in the second working mode, and the heating device 108 is used to heat the motor and the battery. Alternatively, the first flow direction regulating device 8 is in the second working state, the second flow direction regulating device 9 is in the second working mode, and the residual heat of the battery and the motor is used for heating the passenger compartment, reducing the frequency of use of the compressor 1, saving energy, etc.

[0101] According to another specific embodiment of the present application, Fig.13 As shown, the structure of the thermal management system is basically the same as that of the thermal management system of the above embodiment, and the working principle is also roughly the same as that of the above embodiment. The same points can be referred to the description of the above embodiment, and will not be repeated here. The difference is that the thermal management system does not have the fifth valve 205 and the sixth valve 206, but has a flow direction switching device 14.

[0102] The flow direction switching device 14 includes a first interface 141, a second interface 142, a third interface 143 and a fourth interface 144. The flow direction switching device 14 has a first working mode and a second working mode. In the first working mode, the first interface 141 is connected to the second interface 142, and the third interface 143 is connected to the fourth interface 144. In the second working mode, the first interface 141 is connected to the fourth interface 144, and the second interface 142 is connected to the third interface 143. Optionally, the flow direction switching device 14 is a four-way valve.

[0103] The first interface 141 is connected to the outlet of the compressor 1, the second interface 142 is connected to the first end of the first branch A1 and the first end of the second branch A2, the third interface 143 is connected to the first port of the fourth valve 204, and the fourth interface 144 is connected to a port of the first heat exchange unit 61, which is on the side away from the outdoor heat exchanger 103 and the first valve 201.

[0104] The flow direction switching device 14 is used to switch the flow direction of the refrigerant in the refrigerant system. When the flow direction switching device 14 is in the first working mode, the high-temperature refrigerant discharged from the compressor 1 flows to the first branch A1 or the second branch A2. At this time, the thermal management system can operate one of the first heating mode, the second heating mode, the third heating mode, the first defrost mode, the first auxiliary heating mode and the second auxiliary heating mode.

[0105] When the flow switching device 14 is in the second working mode, the high-temperature refrigerant discharged from the compressor 1 flows to the outdoor heat exchanger 103 or the third branch A3. At this time, the thermal management system can operate one of the first refrigeration mode, the second refrigeration mode, the third refrigeration mode and the second defrosting mode. In the first refrigeration mode and the second refrigeration mode, when the second valve 202 is in the off state and the fourth valve 204 is in the on state, the refrigerant flowing out of the first branch A1 flows through the flow switching device 14 and the fourth valve 204 and then flows into the gas-liquid separator 10. When the fourth valve 204 is in the off state and the second valve 202 and the third valve 203 are in the on state, the refrigerant flowing out of the first branch A1 flows through the third valve 203 and the second valve 202 and then flows into the gas-liquid separator 10.

[0106] In the third refrigeration mode and the second refrigeration mode, when the second valve 202 is in the off state and the fourth valve 204 is in the on state, the refrigerant flowing out of the second branch A2 flows through the flow direction switching device 14 and the fourth valve 204 and then flows into the gas-liquid separator 10. When the fourth valve 204 is in the off state and the second valve 202 is in the on state, the refrigerant flowing out of the third heat exchange part 51 flows through the second valve 202 and then flows into the gas-liquid separator 10. The above two communication modes for flowing into the gas-liquid separator 10 can be selected according to the system design requirements, and this application is not limited.

[0107] According to another specific embodiment of the present application, Fig.14 As shown, the structure of the thermal management system is basically the same as that of the thermal management system of the first specific embodiment, and the working principle is also roughly the same as that of the first specific embodiment. The same points can be referred to the description of the first specific embodiment, and will not be repeated here. The difference is that the first flow direction regulating device 8 includes a first multi-way valve 15 and a second multi-way valve 16 which are independently formed, and the valve body of the first multi-way valve 15 is connected to the valve body of the second multi-way valve 16 through a pipeline or directly fixedly connected.

[0108] The first multi-way valve 15 includes a first connection port 81, a second connection port 82, a fourth connection port 84 and a first intermediate connection port 86, and the first connection port 81, the second connection port 82, the fourth connection port 84 and the first intermediate connection port 86 are not connected on the valve body surface of the first multi-way valve 15. Optionally, the first multi-way valve 15 is a four-way water valve. The second multi-way valve 16 includes a third connection port 83, a fifth connection port 85 and a second intermediate connection port 87, and the third connection port 83, the fifth connection port 85 and the second intermediate connection port 87 are not connected on the valve body surface of the second multi-way valve 16. Optionally, the second multi-way valve 16 is a three-way water valve.

[0109] When the first flow direction regulating device 8 is in the first working state, the first connecting port 81 is connected to the second connecting port 82 , the first intermediate connecting port 86 is connected to the fourth connecting port 84 , the first intermediate connecting port 86 is connected to the second intermediate connecting port 87 , and the second intermediate connecting port 87 is connected to the third connecting port 83 .

[0110] When the first flow direction regulating device 8 is in the second working state, the first connecting port 81 is connected to the fourth connecting port 84 , the first intermediate connecting port 86 is connected to the second connecting port 82 , the first intermediate connecting port 86 is connected to the second intermediate connecting port 87 , and the second intermediate connecting port 87 is connected to the third connecting port 83 .

[0111] When the first flow direction regulating device 8 is in the third working state, the first connecting port 81 is connected to the second connecting port 82 , the first intermediate connecting port 86 is connected to the fourth connecting port 84 , the first intermediate connecting port 86 is connected to the second intermediate connecting port 87 , and the second intermediate connecting port 87 is connected to the fifth connecting port 85 .

[0112] When the first flow direction regulating device 8 is in the fourth working state, the first connecting port 81 is connected to the fourth connecting port 84 , the first intermediate connecting port 86 is connected to the second connecting port 82 , the first intermediate connecting port 86 is connected to the second intermediate connecting port 87 , and the second intermediate connecting port 87 is connected to the fifth connecting port 85 .

[0113] It is understood that in some other embodiments, the refrigerant system is Fig.13 The structural design of the refrigerant system is shown in the figure, and the coolant system is Fig.14 The structural design of the coolant system shown does not affect the realization of various working conditions and is not limited by this application.

[0114] In some other embodiments, such as Fig.15 As shown, the first flow direction regulating device 8 includes a plurality of independently formed three-way valves, and the valve bodies of the plurality of three-way valves are directly or indirectly connected. By designing the connection relationship of the valve ports of the plurality of three-way valves, the switching of the four working states of the first flow direction regulating device 8 is realized.

[0115] The second flow regulating device 2 and the first flow regulating device 3 in the present application are both two-way throttle valves, which reduce the number of valves and connecting pipes of the thermal management system, and make the structure of the thermal management system simpler. The second flow regulating device 2 and the first flow regulating device 3 can be at the upstream end or downstream end of their respective branches at the same time when the thermal management system is running. When the passenger compartment is heated, the battery heat exchange component can be heated, and when the passenger compartment is cooled, the battery heat exchange component can be cooled. The battery heat exchange component can be heated or cooled by the refrigerant, and the use of the coolant system heating device 108 can be reduced, which can save energy and improve safety. A first heat exchanger 6 is provided between the outdoor heat exchanger 103 and the compressor 1. When the passenger compartment is heated, the heat of the coolant circuit can be recycled to improve the heating effect of the system. When the passenger compartment is cooled, the temperature of the coolant before throttling can be reduced twice to improve the cooling effect of the system.

[0116] In the present application, the "connection" between two components can be a direct connection or a connection through a pipeline. There can be only a pipeline between the two components, or there can be a valve or other components between the two components. Similarly, the "communication" between two components in the present application can be a direct connection or a connection through a pipeline. There can be only a pipeline between the two components, or there can be a valve or other components between the two components.

[0117] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A thermal management system, characterized in that: include: A compressor, an indoor heat exchanger, a first flow regulating device, an outdoor heat exchanger, a first heat exchanger, a first fluid driving device, a second fluid driving device, a heat exchange device for a heating device, a second heat exchanger, a heating device, and an air conditioning box, wherein the first heat exchanger includes a first heat exchange portion and a second heat exchange portion, the first heat exchange portion is not connected to the second heat exchange portion, and the second heat exchanger and the indoor heat exchanger are located in the air conditioning box; The thermal management system has a first auxiliary heating mode. In the first auxiliary heating mode, the compressor, the indoor heat exchanger, the first flow regulating device, the outdoor heat exchanger and the first heat exchange part are connected to form a loop, the first fluid driving device, the heating device and the second heat exchanger are connected to form a loop, the second fluid driving device, the heat exchange device of the heating device and the second heat exchange part are connected to form a loop, the first flow regulating device is in a throttling state, the heating device is in an open state, the outlet of the indoor heat exchanger is connected to the inlet of the first flow regulating device, the outlet of the first flow regulating device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first heat exchange part, and the first heat exchange part exchanges heat with the second heat exchange part; The thermal management system has a second auxiliary heating mode. In the second auxiliary heating mode, the compressor, the indoor heat exchanger, the first flow regulating device, the outdoor heat exchanger and the first heat exchange part are connected to form a loop, the first fluid driving device, the second fluid driving device, the heating device, the second heat exchanger, the heat exchange device of the heating device and the second heat exchange part are connected to form a loop, the first flow regulating device is in a throttling state, the outlet of the indoor heat exchanger is connected to the inlet of the first flow regulating device, the outlet of the first flow regulating device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first heat exchange part, and the first heat exchange part and the second heat exchange part perform heat exchange; according to the demand for heat, the heating device is selected to be turned on or off.

2. A thermal management system according to claim 1, characterized in that: The heat exchange device of the heating equipment includes a battery heat exchange device and a motor heat exchange device. In the first auxiliary heating mode, the first fluid driving device, the heating device and the second heat exchanger are connected to form a loop, and the second fluid driving device, the motor heat exchange device, the battery heat exchange device and the second heat exchange part are connected to form a loop, and the two loops are not connected to each other; in the second auxiliary heating mode, the first fluid driving device, the second fluid driving device, the heating device, the second heat exchanger, the battery heat exchange device, the motor heat exchange device and the second heat exchange part are connected to form a loop, the outlet of the motor heat exchange device is connected to the inlet of the second heat exchanger, and the inlet of the battery heat exchange device is connected to the outlet of the second heat exchanger.

3. A thermal management system according to claim 1, characterized in that: The thermal management system comprises a first flow direction regulating device, the first flow direction regulating device comprises a first connection port, a second connection port, a third connection port and a fourth connection port, and the first flow direction regulating device has a first working state and a second working state; The thermal management system comprises a first flow path and a second flow path, wherein a first port of the first flow path can be communicated with the first connection port, a second port of the first flow path can be communicated with the second connection port, a first port of the second flow path can be communicated with the third connection port, a second port of the second flow path can be communicated with the fourth connection port, the first fluid driving device, the heating device and the second heat exchanger are arranged in the first flow path, and the second fluid driving device, the heat exchange device of the heat generating device and the second heat exchange part are arranged in the second flow path; In the first auxiliary heating mode, the first flow direction regulating device is in a first working state, the first connection port is connected to the second connection port, the third connection port is connected to the fourth connection port, and the first flow path is not connected to the second flow path; In the second auxiliary heating mode, the first flow direction regulating device is in a second working state, the first connection port is communicated with the fourth connection port, the second connection port is communicated with the third connection port, and the first flow path is communicated with the second flow path.

4. A thermal management system according to claim 3, characterized in that: The first flow direction regulating device further includes a fifth connection port, the first flow direction regulating device includes a valve body and a valve core at least partially located in the valve body, the first connection port, the second connection port, the third connection port, the fourth connection port and the fifth connection port are all arranged on the valve body, and the first connection port, the second connection port, the third connection port, the fourth connection port and the fifth connection port are not connected on the surface of the valve body; The first flow direction regulating device also has a third working state and a fourth working state. When the first flow direction regulating device is in the third working state, the first connection port is communicated with the second connection port, and the fourth connection port is communicated with the fifth connection port; when the first flow direction regulating device is in the fourth working state, the first connection port is communicated with the fourth connection port, and the second connection port is communicated with the fifth connection port; The valve core can control the first flow direction regulating device to be in one of a first working state, a second working state, a third working state and a fourth working state.

5. A thermal management system according to claim 3, characterized in that: The first flow direction regulating device further includes a fifth connection port, the first flow direction regulating device includes a first multi-way valve and a second multi-way valve connected to the first multi-way valve, the first connection port, the second connection port and the fourth connection port are provided on the first multi-way valve, the third connection port and the fifth connection port are provided on the second multi-way valve, the first multi-way valve further includes a first intermediate connection port, and the second multi-way valve further includes a second intermediate connection port; The first flow direction regulating device also has a third working state and a fourth working state. When the first flow direction regulating device is in the first working state, the first connection port is connected to the second connection port, the first intermediate connection port is connected to the fourth connection port, the first intermediate connection port is connected to the second intermediate connection port, and the second intermediate connection port is connected to the third connection port; When the first flow direction regulating device is in the second working state, the first connection port is connected to the fourth connection port, the first intermediate connection port is connected to the second connection port, the first intermediate connection port is connected to the second intermediate connection port, and the second intermediate connection port is connected to the third connection port; When the first flow direction regulating device is in the third working state, the first connection port is connected to the second connection port, the first intermediate connection port is connected to the fourth connection port, the first intermediate connection port is connected to the second intermediate connection port, and the second intermediate connection port is connected to the fifth connection port; When the first flow direction regulating device is in the fourth working state, the first connection port is connected to the fourth connection port, the first intermediate connection port is connected to the second connection port, the first intermediate connection port is connected to the second intermediate connection port, and the second intermediate connection port is connected to the fifth connection port.

6. A thermal management system according to claim 3, characterized in that: The thermal management system includes a third fluid driving device, a second flow direction regulating device and a fifth heat exchanger, and the heat exchange device for the heat generating device includes a battery heat exchange device and a motor heat exchange device; The second flow path includes a second flow direction regulating device, a first sub-flow path, a second sub-flow path, a third sub-flow path and a fourth sub-flow path, the third fluid driving device and the battery heat exchange device are arranged in the first sub-flow path, the second fluid driving device, the motor heat exchange device and the second heat exchange part are arranged in the second sub-flow path, the fifth heat exchanger is arranged in the third sub-flow path, and the fourth sub-flow path is a pipeline; The second flow direction regulating device includes a sixth connection port, a seventh connection port, an eighth connection port and a ninth connection port, and the first flow direction regulating device also includes a fifth connection port; The first port of the first sub-flow path can be communicated with the sixth connection port, the second port of the first sub-flow path can be communicated with the seventh connection port, the first port of the second sub-flow path can be communicated with the eighth connection port, the second port of the second sub-flow path can be communicated with the fourth connection port, the first port of the third sub-flow path can be communicated with the fifth connection port, the second port of the third sub-flow path can be communicated with the ninth connection port, the first port of the fourth sub-flow path can be communicated with the third connection port, and the second port of the fourth sub-flow path can be communicated with the ninth connection port.

7. A thermal management system according to claim 6, characterized in that: The second flow direction regulating device has a first working mode and a second working mode. In the first working mode, the sixth connection port is connected to the seventh connection port, and the eighth connection port is connected to the ninth connection port; in the second working mode, the sixth connection port is connected to the ninth connection port, and the eighth connection port is connected to the seventh connection port.

8. A thermal management system according to claim 1, characterized in that: The thermal management system includes a third heat exchanger and a second flow regulating device, the third heat exchanger includes a third heat exchange part and a fourth heat exchange part, and the third heat exchange part is not connected to the fourth heat exchange part; The thermal management system has a heating mode. In the heating mode, the compressor, the indoor heat exchanger, the first flow regulating device, the outdoor heat exchanger, and the first heat exchange part are connected to form a loop, the first flow regulating device is in a throttling state, the outlet of the indoor heat exchanger is connected to the inlet of the first flow regulating device, the outlet of the first flow regulating device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first heat exchange part, and the first heat exchange part exchanges heat with the second heat exchange part; Or, the compressor, the third heat exchange part, the second flow regulating device, the outdoor heat exchanger and the first heat exchange part are connected to form a loop, the second flow regulating device is in a throttling state, the outlet of the third heat exchange part is connected to the inlet of the second flow regulating device, the outlet of the first flow regulating device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first heat exchange part, the first heat exchange part exchanges heat with the second heat exchange part, and the third heat exchange part exchanges heat with the fourth heat exchange part.

9. A thermal management system according to claim 1, characterized in that: The thermal management system includes a third heat exchanger and a second flow regulating device, the third heat exchanger includes a third heat exchange part and a fourth heat exchange part, and the third heat exchange part is not connected to the fourth heat exchange part; The thermal management system has a cooling mode. In the cooling mode, the compressor, the indoor heat exchanger, the first flow regulating device, the outdoor heat exchanger, and the first heat exchange part are connected to form a loop, the first flow regulating device is in a throttling state, the outlet of the first heat exchange part is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first flow regulating device, the inlet of the indoor heat exchanger is connected to the outlet of the first flow regulating device, and the first heat exchange part exchanges heat with the second heat exchange part; Or, the compressor, the third heat exchange part, the second flow regulating device, the outdoor heat exchanger and the first heat exchange part are connected to form a loop, the second flow regulating device is in a throttling state, the outlet of the first heat exchange part is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first flow regulating device, the inlet of the third heat exchange part is connected to the outlet of the second flow regulating device, the first heat exchange part exchanges heat with the second heat exchange part, and the third heat exchange part exchanges heat with the fourth heat exchange part.

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