Thermal management system

Abstract

The present application discloses a thermal management system. In the first refrigeration mode, a compressor, a first heat exchange part, a third heat exchange part, a first throttling device, and a fourth heat exchanger are connected and refrigerant flows through them. The first throttling device is in a throttling state. The outlet of the first heat exchange part and / or the outlet of the third heat exchange part are connected to the inlet of the first throttling device. The outlet of the first throttling device is connected to the inlet of the fourth heat exchanger. A first pump, a second heat exchange part, and a fifth heat exchange part are connected and coolant flows through them. A second pump, a fourth heat exchange part, a sixth heat exchange part, and a fifth heat exchanger are connected and coolant flows through them. After releasing heat twice, the temperature of the refrigerant before flowing to the first throttling device is relatively low, so that the temperature of the refrigerant throttled by the first throttling device is relatively low, thereby improving the refrigeration effect.

Description

Technical Field

[0001] This application relates to the technical field of thermal management, and particularly to a thermal management system. Background Art

[0002] The thermal management system of a vehicle (such as an electric vehicle) can adjust the ambient temperature in the passenger compartment, the battery temperature, and the motor temperature.

[0003] In a related thermal management system, the outlet of the compressor is respectively connected to a water-cooled heat exchanger and an indoor condenser. When there is a refrigeration demand in the passenger compartment, the outlet of the compressor is communicated with the water-cooled heat exchanger, and the refrigerant releases heat to the coolant through the water-cooled heat exchanger, and then enters the indoor evaporator after throttling by a throttling device, thereby realizing refrigeration in the passenger compartment. When the refrigeration demand in the passenger compartment is large, due to the limited heat exchange capacity of the water-cooled heat exchanger, the refrigeration effect is not good. Summary of the Invention

[0004] In view of the above problems existing in the related art, this application provides a thermal management system with a better refrigeration effect.

[0005] To achieve the above object, this application adopts the following technical solutions: A thermal management system includes: a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger, a first pump, a second pump, and a first throttling device. The first heat exchanger includes a first heat exchange part and a second heat exchange part which are separately arranged. The second heat exchanger includes a third heat exchange part and a fourth heat exchange part which are separately arranged. The third heat exchanger includes a fifth heat exchange part and a sixth heat exchange part which are separately arranged;

[0006] The thermal management system has a first refrigeration mode. In the first refrigeration mode, the compressor, the first heat exchange part, the third heat exchange part, the first throttling device, and the fourth heat exchanger are communicated and the refrigerant flows through them. The first throttling device is in a throttling state. The outlet of the first heat exchange part and / or the outlet of the third heat exchange part is / are communicated with the inlet of the first throttling device. The outlet of the first throttling device is communicated with the inlet of the fourth heat exchanger. The first pump, the second heat exchange part, and the fifth heat exchange part are communicated and the coolant flows through them. The second pump, the fourth heat exchange part, the sixth heat exchange part, and the fifth heat exchanger are communicated and the coolant flows through them. The first heat exchange part exchanges heat with the second heat exchange part. The third heat exchange part exchanges heat with the fourth heat exchange part. The fifth heat exchange part exchanges heat with the sixth heat exchange part.

[0007] The thermal management system of the present application operates in the first refrigeration mode. The refrigerant releases heat to the coolant in the coolant circuit where the fifth heat exchanger is located through the first heat exchanger, and releases heat to the coolant in the coolant circuit where the fifth heat exchanger is located through the second heat exchanger and the third heat exchanger. After releasing heat twice, the temperature of the refrigerant flowing before the first throttling device is relatively low, so that the temperature of the refrigerant throttled by the first throttling device is relatively low, thereby improving the refrigeration effect. Description of the Drawings

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

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

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

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

[0012] Figure 5 is a schematic diagram of the hybrid refrigeration mode of an embodiment of the thermal management system of the present application;

[0013] Figure 6 is a schematic diagram of the first battery refrigeration mode of an embodiment of the thermal management system of the present application;

[0014] Figure 7 is a schematic diagram of the second battery refrigeration mode of an embodiment of the thermal management system of the present application;

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

[0016] Figure 9 is a schematic diagram of the second heating mode of an embodiment of the thermal management system of the present application;

[0017] Figure 10 is a schematic diagram of the third heating mode of an embodiment of the thermal management system of the present application;

[0018] Figure 11 is a schematic diagram of the first battery heating mode of an embodiment of the thermal management system of the present application;

[0019] Figure 12 is a schematic diagram of the second battery heating mode of an embodiment of the thermal management system of the present application;

[0020] Figure 13Schematic diagram of the first heating and dehumidifying mode of an embodiment of the thermal management system of the present application;

[0021] Figure 14 Schematic diagram of the second heating and dehumidifying mode of an embodiment of the thermal management system of the present application;

[0022] Figure 15 Schematic diagram of the heat dissipation mode of an embodiment of the thermal management system of the present application;

[0023] Figure 16 Schematic diagram of the first motor waste heat utilization mode of an embodiment of the thermal management system of the present application;

[0024] Figure 17 Schematic diagram of the second motor waste heat utilization mode of an embodiment of the thermal management system of the present application;

[0025] Figure 18 Schematic diagram of the balancing mode of an embodiment of the thermal management system of the present application. Detailed implementation manners

[0026] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0027] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should be understood that the "first", "second" and similar terms used in the description and claims of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the similar terms such as "one" or "a" do not denote a quantity limitation, but mean that there is at least one; "a plurality" means a quantity of two or more. Unless otherwise specified, the similar terms such as "front part", "rear part", "lower part" and / or "upper part" are only for convenience of description and are not limited to a position or a spatial orientation. The terms "including" or "comprising" and the like are intended to cover the elements or items appearing before "including" or "comprising" and the equivalents of the elements or items listed after "including" or "comprising", and do not exclude other elements or items.

[0029] The following will describe the thermal management system of the exemplary embodiments of the present application in detail with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be supplemented or combined with each other.

[0030] According to a specific embodiment of the thermal management system of the present application, as Figure 1 shown, the thermal management system includes a first heat exchanger 3, a second heat exchanger 8, a third heat exchanger 9, and a sixth heat exchanger 4. All four heat exchangers are liquid-cooled heat exchangers. The structure and working principle of the liquid-cooled heat exchanger are well-known to those skilled in the art and will not be elaborated in this application. The first heat exchanger 3 includes a first heat exchange part 31 and a second heat exchange part 32. The second heat exchanger 8 includes a third heat exchange part 81 and a fourth heat exchange part 82. The third heat exchanger 9 includes a fifth heat exchange part 91 and a sixth heat exchange part 92. The sixth heat exchanger 4 includes a seventh heat exchange part 41 and an eighth heat exchange part 42. The first heat exchanger 3, the second heat exchanger 8, and the sixth heat exchanger 4 are respectively used for heat exchange between the refrigerant and the coolant. The third heat exchanger 9 is used for heat exchange between the coolant in one loop and the coolant in another loop. The first heat exchanger 3, the second heat exchanger 8, the third heat exchanger 9, and the sixth heat exchanger 4 may be the same or different.

[0031] Each component of the thermal management system is connected by pipelines to form two major systems, namely the refrigerant system and the coolant system. Among them, the coolant system includes a first coolant system and a second coolant system. The refrigerant system, the first coolant system, and the second coolant system are isolated from each other and not connected. Refrigerant flows in the refrigerant system, and coolant flows in the coolant system. The refrigerant may be R134A, carbon dioxide, or other heat exchange media, and the coolant may be a mixed solution of ethanol and water or other cooling media. Among them, the flow channels of the first heat exchange part 31, the third heat exchange part 81, and the seventh heat exchange part 41 are connected to the refrigerant system. The flow channels of the second heat exchange part 32 and the fifth heat exchange part 91 are connected to the first coolant system. The flow channels of the fourth heat exchange part 82, the sixth heat exchange part 92, and the eighth heat exchange part 42 are connected to the second coolant system.

[0032] It should be explained that the statement "the flow channel of the first heat exchange part 31 is connected to the refrigerant system" means that the refrigerant system includes the first heat exchange part 31, and the refrigerant in the refrigerant system can flow into and out of the flow channel of the first heat exchange part 31. The inlet and outlet of the first heat exchange part 31 can be connected to other components in the refrigerant system through pipelines and form a loop after being connected through pipelines during the operation of the thermal management system. For the connection of the flow channels of the third heat exchange part 81 and the seventh heat exchange part 41 to the refrigerant system, and the connection of the flow channels of the second heat exchange part 32 and the fifth heat exchange part 91 to the first coolant system, and the connection of the flow channels of the fourth heat exchange part 82, the sixth heat exchange part 92, and the eighth heat exchange part 42 to the second coolant system, refer to the above explanation.

[0033] In this embodiment, the refrigerant system includes a compressor 1, a first heat exchange part 31, a third heat exchange part 81, a seventh heat exchange part 41, a fourth heat exchanger 102, a plurality of throttling devices and a plurality of multi-way devices. These components can be indirectly connected through pipelines or valve parts, or integrated into an integral structure after integration.

[0034] In some other embodiments, the refrigerant system is further provided with a gas-liquid separator 17. The gas-liquid separator 17 is arranged in front of the inlet of the compressor 1 to perform gas-liquid separation on the refrigerant before entering the compressor 1, reducing the possibility of the compressor 1 being liquid-hammered. For ease of understanding, the following description will be given taking the case where the gas-liquid separator 17 is not provided as an example.

[0035] The plurality of multi-way devices include a first multi-way device 2 and a second multi-way device 7. The first multi-way device 2 includes a first interface 21, a second interface 22 and a third interface 23. When the first multi-way device 2 is in a working state, the first interface 21 is communicated with at least one of the second interface 22 and the third interface 23. Optionally, the first multi-way device 2 is a proportional three-way valve. When the first interface 21 is communicated with the second interface 22 and the third interface 23, the flow rate ratio of the refrigerant flowing from the first interface 21 to the second interface 22 and the third interface 23 can be adjusted. For example, by controlling the first multi-way device 2, the ratio of the flow rate flowing out of the second interface 22 to the flow rate flowing into the first interface 21 is 40%, and the ratio of the flow rate flowing out of the third interface 23 to the flow rate flowing into the first interface 21 is 60%. The second multi-way device 7 includes a fourth interface 71, a fifth interface 72 and a sixth interface 73. When the second multi-way device 7 is in a working state, the fourth interface 71 is communicated with at least one of the fifth interface 72 and the sixth interface 73. Optionally, the second multi-way device 7 is a three-way valve.

[0036] The plurality of throttling devices include a first throttling device 5 and a second throttling device 6. The first throttling device 5 has a throttling state and a cut-off state. When the first throttling device 5 is in the throttling state, the refrigerant flows from the inlet of the first throttling device 5 to the outlet, and the refrigerant flowing through the first throttling device 5 is cooled and depressurized. When the first throttling device 5 is in the cut-off state, the inlet and the outlet of the first throttling device 5 are not communicated, and no refrigerant flows through the branch where the first throttling device 5 is located. Optionally, the first throttling device 5 is an electronic expansion valve or a thermal expansion valve. In some other embodiments, the first throttling device 5 can also be other types of valve parts, or a combination of at least two valve parts, as long as the first throttling device 5 can have a cut-off state and a throttling state. The second throttling device 6 has a throttling state and a cut-off state. The working principle of the second throttling device 6 is the same as that of the first throttling device 5, and reference can be made to the above description.

[0037] The outlet of the compressor 1 is connected to the first interface 21, the second interface 22 is connected to one port of the first heat exchange part 31, and the third interface 23 is connected to one port of the third heat exchange part 81. The other port of the first heat exchange part 31 is connected to the sixth interface 73, and the other port of the third heat exchange part 81 is connected to the fifth interface 72. The fourth interface 71 is connected to the inlets of the first throttling device 5 and the second throttling device 6. The outlet of the first throttling device 5 is connected to one port of the fourth heat exchanger 102, and the outlet of the second throttling device 6 is connected to one port of the seventh heat exchange part 41. The other ports of the fourth heat exchanger 102 and the seventh heat exchange part 41 are both connected to the inlet of the compressor 1.

[0038] In this embodiment, the first coolant system includes a first pump 10, a heating device 106, a third multi-way device 13, a seventh heat exchanger 101, a second heat exchange part 32, and a fifth heat exchange part 91. The second coolant system includes a second pump 12, a third pump 11, a battery heat exchange device 104, a motor heat exchange device 105, a fifth heat exchanger 103, a fourth heat exchange part 82, a sixth heat exchange part 92, an eighth heat exchange part 42, a fourth multi-way device 14, a first flow direction switching device 15, and a second flow direction switching device 16. These components can be indirectly connected through pipelines or valve parts, or can be integrated into an integrated structure.

[0039] The third multi-way device 13 includes a seventh interface 131, an eighth interface 132, and a ninth interface 133. When the third multi-way device 13 is in the working state, the seventh interface 131 is communicated with at least one of the eighth interface 132 and the ninth interface 133. The fourth multi-way device 14 includes a tenth interface 141, an eleventh interface 142, and a twelfth interface 143. When the fourth multi-way device 14 is in the working state, the eleventh interface 142 is communicated with at least one of the tenth interface 141 and the twelfth interface 143. Optionally, the third multi-way device 13 and the fourth multi-way device 14 are three-way valves.

[0040] The first flow direction switching device 15 includes a first port 151, a second port 152, a third port 153, and a fourth port 154. The first flow direction switching device 15 has a first working state and a second working state, and can be switched between the two working states according to system requirements. When the first flow direction switching device 15 is in the first working state, the first port 151 and the second port 152 are communicated, and the third port 153 and the fourth port 154 are communicated. When the first flow direction switching device 15 is in the second working state, the first port 151 and the fourth port 154 are communicated, and the second port 152 and the third port 153 are communicated.

[0041] The second flow direction switching device 16 includes a fifth port 161, a sixth port 162, a seventh port 163 and an eighth port 164. The second flow direction switching device 16 has a first working mode and a second working mode, and can be switched between the two working modes according to system requirements. When the second flow direction switching device 16 is in the first working mode, the fifth port 161 and the sixth port 162 are connected, and the seventh port 163 and the eighth port 164 are connected; when the second flow direction switching device 16 is in the second working mode, the fifth port 161 and the eighth port 164 are connected, and the sixth port 162 and the seventh port 163 are connected. Optionally, the first flow direction switching device 15 and the second flow direction switching device 16 are four-way valves.

[0042] The first pump 10, the second pump 12 and the third pump 11 are used to provide power for the flow of the coolant in the coolant system. Optionally, the first pump 10, the second pump 12 and the third pump 11 are electric water pumps, and the types and specifications of the three pumps can be the same or different, and are selected according to the requirements of the thermal management system.

[0043] The battery heat exchange device 104 is used for thermal management of the battery. Optionally, the battery heat exchange device 104 can be an integrated component integrated with the battery, or an independent component and then assembled with the battery. The motor heat exchange device 105 is used for thermal management of the motor. Optionally, the motor heat exchange device 105 can be an integrated component integrated with the motor, or an independent component and then assembled with the motor. The heating device 106 is used to heat the coolant. Optionally, the heating device 106 is an electric heater.

[0044] The coolant system includes a first branch a, a second branch b, a third branch c, a fourth branch d and a fifth branch e. The battery heat exchange device 104 and the sixth heat exchange part 92 are arranged in the first branch a. The motor heat exchange device 105 and the second pump 12 are arranged in the second branch b. The fourth heat exchange part 82, the fifth heat exchanger 103 and the fourth multi-way device 14 are arranged in the third branch c. The third pump 11 and the eighth heat exchange part 42 are arranged in the fourth branch d. The fifth branch e is arranged in parallel with the fifth heat exchanger 103. The fifth branch e is a pipe with a hollow interior and can be used to bypass the fifth heat exchanger 103.

[0045] It should be understood that "the battery heat exchange device 104 and the sixth heat exchange part 92 are arranged in the first branch a" means that the first branch a includes the battery heat exchange device 104, the sixth heat exchange part 92 and pipelines, which are used for the connection and communication between the two, and for the connection and communication between the two and other components. For the understanding of the second branch b, the third branch c, and the fourth branch d, refer to the relevant explanations of the first branch a. The first port 151 is connected to one port of the second branch b, the second port 152 is connected to one port of the first branch a, the third port 153 is connected to one port of the fourth branch d, and the fourth port 154 is connected to one port of the third branch c. The fifth port 161 is connected to the other port of the first branch a, the sixth port 162 is connected to the other port of the second branch b, the seventh port 163 is connected to the other port of the third branch c, and the eighth port 164 is connected to the other port of the fourth branch d. The tenth interface 141 is connected to one port of the fifth branch e, the eleventh interface 142 is connected to the seventh port 163, the twelfth interface 143 is connected to one port of the fifth heat exchanger 103, and the other port of the fifth heat exchanger 103 and the other port of the fifth branch e are both connected to one port of the fourth heat exchange part 82. The other port of the fourth heat exchange part 82 is connected to the fourth port 154.

[0046] The outlet of the first pump 10 is connected to the inlet of the heating device 106, the outlet of the heating device 106 is connected to the seventh interface 131, the eighth interface 132 is connected to the inlet of the seventh heat exchanger 101, and the ninth interface 133 is connected to the inlet of the fifth heat exchange part 91. The outlets of the seventh heat exchanger 101 and the fifth heat exchange part 91 are both connected to the inlet of the second heat exchange part 32, and the outlet of the second heat exchange part 32 is connected to the inlet of the first pump 10.

[0047] By switching the working states of the first flow direction switching device 15 and the second flow direction switching device 16, the first branch a, the second branch b, the third branch c, and the fourth branch d are connected in series or in parallel, so that the motor heat exchange device 105 and the battery heat exchange device 104 are in the same circuit or are respectively located in their own independent circuits.

[0048] In some other embodiments, any one of the above multi-way devices can be replaced with other types of valve parts or combinations of other types of valve parts according to their functions, such as one-way valves, globe valves, proportional valves, or combinations thereof, etc.

[0049] The thermal management system provided by the embodiment of the present application can be applied to an electric vehicle. The electric vehicle has an air conditioner box 100 that exchanges heat with the air in the passenger compartment. A fourth heat exchanger 102 and a seventh heat exchanger 101 are arranged in the air conditioner box 100. The fourth heat exchanger 102 and the seventh heat exchanger 101 are used for heat exchange with the air in the air conditioner box 100 to adjust the temperature of the passenger compartment. The seventh heat exchanger 101 is located on the downstream side of the air flow relative to the fourth heat exchanger 102. A blower is arranged in the air conditioner box 100 to guide the flow of the air in the air conditioner box 100. A fifth heat exchanger 103 is arranged near the front air intake grille of the vehicle. The fifth heat exchanger 103 is used for heat exchange with the ambient atmosphere, and is provided with a fan device to guide the flow of air, and is used to release heat to the ambient atmosphere or absorb heat from the ambient atmosphere. A compressor 1 and a gas-liquid separator 17 are arranged in the front engine cavity of the cab. The fourth heat exchanger, the fifth heat exchanger 103 and the seventh heat exchanger 101 are all air-cooled heat exchangers, and are all used for heat exchange with air. The structure of the air-cooled heat exchanger is well known to those skilled in the art, and will not be described in detail in this application.

[0050] The thermal management system of this embodiment has multiple working modes, including a heating mode, a cooling mode, a battery heating mode, a battery cooling mode, a heating and dehumidifying mode, a heat dissipation mode, etc. The thermal management system of this embodiment is applicable not only to vehicles, but also to other heat exchange systems that require thermal management. For the convenience of description, the specification of this application takes the application to vehicles as an example for illustration.

[0051] Refer to Figures 2 to 7 , in the case of a relatively high ambient temperature, when only the passenger compartment has a cooling demand, the thermal management system executes the cooling mode; when only the battery has a cooling demand, the thermal management system executes the battery cooling mode; when both the passenger compartment and the battery have a cooling demand, the thermal management system executes the hybrid cooling mode.

[0052] When only the passenger compartment has a cooling demand and the battery temperature is not high, and even heat can be stored, refer to Figure 2 , the thermal management system executes the first cooling mode. The compressor 1 is turned on, the first throttling device 5 is in a throttling state, the second throttling device 6 is in a cut-off state, the first interface 21, the second interface 22 and the third interface 23 are connected, and the fourth interface 71, the fifth interface 72 and the sixth interface 73 are connected. The first pump 10, the second pump 12 and the third pump 11 are turned on, the first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the first working mode, the seventh interface 131 is connected to the ninth interface 133, the eleventh interface 142 is connected to the twelfth interface 143, and the heating device 106 is in a closed state and is used as a pipeline.

[0053] Specifically, the outlet of the compressor 1, the first heat exchange part 31, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the compressor 1, the third heat exchange part 81, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the first pump 10, the heating device 106, the fifth heat exchange part 91, the second heat exchange part 32, and the inlet of the first pump 10 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the fifth heat exchanger 103, the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are connected in sequence.

[0054] The high-temperature and high-pressure refrigerant discharged by the compressor 1 is divided into two paths: one path flows to the first heat exchange part 31, and the refrigerant in the first heat exchange part 31 releases heat to the coolant in the second heat exchange part 32. Through the circulating flow of the coolant in the first coolant system, the coolant flows through the fifth heat exchange part 91, and the coolant in the fifth heat exchange part 91 releases heat to the coolant in the sixth heat exchange part 92; the other path flows to the third heat exchange part 81, and the refrigerant in the third heat exchange part 81 releases heat to the coolant in the fourth heat exchange part 82. The coolant in the second coolant system circulates, and the heat of the motor heat exchange device 105, the heat at the sixth heat exchange part 92, and the heat at the fourth heat exchange part 82 are released to the atmospheric environment through the fifth heat exchanger 103, and the temperature of the coolant decreases, thereby cooling the motor and reducing the temperature of the refrigerant. The refrigerant flowing out of the first heat exchange part 31 and the third heat exchange part 81 both flow through the first throttling device 5 in a throttling state, and then flow into the fourth heat exchanger 102, where the refrigerant exchanges heat with the air in the air conditioner box 100 to achieve passenger compartment cooling. The refrigerant flowing out of the fourth heat exchanger 102 flows to the compressor 1 and is compressed into high-temperature and high-pressure refrigerant again, circulating in this way.

[0055] In the first refrigeration mode, both the first heat exchanger 3 and the second heat exchanger 8 are used as condensers to reduce the temperature of the refrigerant before the inlet of the first throttling device 5, so that the temperature of the refrigerant throttled by the first throttling device 5 is relatively low, thereby improving the refrigeration effect. If it is not desired to heat the battery, a bypass pipeline can be set to bypass the battery heat exchange device 104.

[0056] When only the passenger compartment has a cooling demand and there is no battery thermal management request, and the battery dissipates heat through the second coolant system, refer to Figure 3, the thermal management system executes the second refrigeration mode. The connection state of the thermal management system is similar to that of the first refrigeration mode, with the differences being that the first interface 21 is in communication with the third interface 23, the fourth interface 71 is in communication with the fifth interface 72, the first pump 10 is closed, and the first coolant system does not operate. The outlet of the compressor 1, the third heat exchange part 81, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The refrigerant in the third heat exchange part 81 releases heat to the coolant in the fourth heat exchange part 82, and the coolant in the second coolant system circulates. The heat at the battery heat exchange device 104, the motor heat exchange device 105, and the fourth heat exchange part 82 is released to the ambient atmosphere through the fifth heat exchanger 103, thereby cooling the motor, cooling the battery, and reducing the refrigerant temperature.

[0057] When there is only a cooling demand in the passenger compartment, and there is no thermal management request for the battery and the battery does not need to be cooled, refer to Figure 4 , the thermal management system executes the third refrigeration mode. The connection state of the thermal management system is similar to that of the first refrigeration mode, with the differences being that the first interface 21 is in communication with the third interface 23, the fourth interface 71 is in communication with the fifth interface 72, the first pump 10 and the third pump 11 are closed, the first coolant system does not operate, and the second flow direction switching device 16 is in the second working mode. The outlet of the compressor 1, the third heat exchange part 81, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the fifth heat exchanger 103, and the inlet of the second pump 12 are connected in sequence. The refrigerant in the third heat exchange part 81 releases heat to the coolant in the fourth heat exchange part 82, and the coolant in the second coolant system circulates. The heat at the motor heat exchange device 105 and the fourth heat exchange part 82 is released to the ambient atmosphere through the fifth heat exchanger 103, thereby cooling the motor and reducing the refrigerant temperature.

[0058] When there are cooling demands in both the passenger compartment and the battery, refer to Figure 5 , the thermal management system executes the hybrid refrigeration mode. The compressor 1 is turned on, the first throttling device 5 and the second throttling device 6 are in the throttling state, the first interface 21 is in communication with the third interface 23, and the fourth interface 71 is in communication with the fifth interface 72. The first pump 10 is closed, the first coolant system does not operate, the second pump 12 and the third pump 11 are turned on, the first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the second working mode, the eleventh interface 142 is in communication with the twelfth interface 143, and the heating device 106 is in the closed state and serves as a pipeline.

[0059] Specifically, the outlet of the compressor 1, the third heat exchange part 81, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the compressor 1, the third heat exchange part 81, the second throttling device 6, the seventh heat exchange part 41, and the inlet of the compressor 1 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the fifth heat exchanger 103, and the inlet of the second pump 12 are connected in sequence. The outlet of the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are connected in sequence.

[0060] The high-temperature and high-pressure refrigerant discharged by the compressor 1 flows to the third heat exchange part 81. The refrigerant in the third heat exchange part 81 releases heat to the coolant in the fourth heat exchange part 82. The coolant circulates, and the heat at the motor heat exchange device 105 and the fourth heat exchange part 82 is released to the atmospheric environment through the fifth heat exchanger 103. The refrigerant flowing out of the third heat exchange part 81 is divided into two paths: one path flows to the first throttling device 5 in a throttling state, and then flows into the fourth heat exchanger 102. The refrigerant exchanges heat with the air in the air-conditioning box 100 to achieve passenger cabin cooling; the other path flows to the second throttling device 6 in a throttling state, and then flows into the seventh heat exchange part 41. The refrigerant in the seventh heat exchange part 41 absorbs heat from the coolant in the eighth heat exchange part 42, and the temperature of the coolant decreases. The coolant circulates to achieve battery cooling. The refrigerant flowing out of the fourth heat exchanger 102 and the seventh heat exchange part 41 flows to the compressor 1 and is compressed into high-temperature and high-pressure refrigerant again, circulating in this way.

[0061] When only the battery has a cooling requirement and there is no one in the vehicle, for example, in the fast charging mode of the battery when there is no one in the vehicle, refer to Figure 6 , the heat management system executes the first battery refrigeration mode. The compressor 1 is turned on, the first throttling device 5 is in a cut-off state, the second throttling device 6 is in a throttling state, the first interface 21, the second interface 22, and the third interface 23 are connected, and the fourth interface 71, the fifth interface 72, and the sixth interface 73 are connected. The first pump 10, the second pump 12, and the third pump 11 are turned on, the first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the second working mode, the seventh interface 131 is connected to the eighth interface 132, the eleventh interface 142 is connected to the twelfth interface 143, and the heating device 106 is in a closed state and is used as a pipeline.

[0062] Specifically, the outlet of the compressor 1, the first heat exchange part 31, the second throttling device 6, the seventh heat exchange part 41, and the inlet of the compressor 1 are connected in sequence. The outlet of the compressor 1, the third heat exchange part 81, the second throttling device 6, the seventh heat exchange part 41, and the inlet of the compressor 1 are connected in sequence. The outlet of the first pump 10, the heating device 106, the seventh heat exchanger 101, the second heat exchange part 32, and the inlet of the first pump 10 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the fifth heat exchanger 103, and the inlet of the second pump 12 are connected in sequence. The outlet of the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are connected in sequence.

[0063] The high-temperature and high-pressure refrigerant discharged by the compressor 1 is divided into two paths: one path flows to the first heat exchange part 31, and the refrigerant in the first heat exchange part 31 releases heat to the coolant in the second heat exchange part 32. The coolant flows through the seventh heat exchanger 101 and releases heat to the unoccupied passenger compartment; the other path flows to the third heat exchange part 81, and the refrigerant in the third heat exchange part 81 releases heat to the coolant in the fourth heat exchange part 82. The coolant in the second coolant system circulates, and the heat of the motor heat exchange device 105 and the heat at the fourth heat exchange part 82 are released to the atmospheric environment through the fifth heat exchanger 103, and the temperature of the coolant decreases, thereby cooling the motor and reducing the temperature of the refrigerant. The refrigerant flowing out of the first heat exchange part 31 and the third heat exchange part 81 both flow through the second throttling device 6 in a throttled state, and then flow into the seventh heat exchange part 41. The refrigerant in the seventh heat exchange part 41 absorbs heat from the coolant in the eighth heat exchange part 42, and the temperature of the coolant decreases. The coolant circulates to achieve battery cooling.

[0064] In the first battery cooling mode, both the first heat exchanger 3 and the second heat exchanger 8 are used as condensers to reduce the temperature of the refrigerant before the inlet of the second throttling device 6, so that the temperature of the refrigerant throttled by the second throttling device 6 is relatively low, thereby improving the cooling effect.

[0065] When only the battery has a cooling requirement, there are people in the vehicle, but there is no cooling requirement in the passenger compartment, refer to Figure 7 ., the thermal management system executes the second battery cooling mode. The connection state of the thermal management system is similar to that of the first battery cooling mode, but the difference is that: the first interface 21 is connected to the third interface 23, the fourth interface 71 is connected to the fifth interface 72, the first pump 10 is closed, and the first coolant system does not work.

[0066] Refer to Figures 8 to 12 ., in the case of a relatively low ambient temperature, when only the passenger compartment has a heating requirement, the thermal management system executes the heating mode; when only the battery has a heating requirement, the thermal management system executes the battery heating mode.

[0067] When only the passenger compartment has a heating demand and the motor and battery have waste heat, refer to Figure 8 , the thermal management system executes the first heating mode. The compressor 1 is turned on, the first throttling device 5 is in a cut-off state, the second throttling device 6 is in a throttling state, the first interface 21 and the second interface 22 are connected, and the fourth interface 71 and the sixth interface 73 are connected. The first pump 10, the second pump 12, and the third pump 11 are turned on. The first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the first working mode, the seventh interface 131 and the eighth interface 132 are connected, and the tenth interface 141 and the eleventh interface 142 are connected.

[0068] Specifically, the outlet of the compressor 1, the first heat exchange part 31, the second throttling device 6, the seventh heat exchange part 41, and the inlet of the compressor 1 are connected in sequence. The outlet of the first pump 10, the heating device 106, the seventh heat exchanger 101, the second heat exchange part 32, and the inlet of the first pump 10 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are connected in sequence. The refrigerant in the first heat exchange part 31 releases heat to the coolant in the second heat exchange part 32. The coolant flows through the seventh heat exchanger 101, and the coolant exchanges heat with the air in the air conditioner box 100 to achieve heating of the passenger compartment. The circulating coolant brings the heat of the motor heat exchange device 105 and the battery heat exchange device 104 to the eighth heat exchange part 42. The refrigerant in the seventh heat exchange part 41 absorbs heat from the coolant in the eighth heat exchange part 42 to realize the recovery of the waste heat of the motor and the battery.

[0069] In some other embodiments, in the first heating mode, the fourth multi-way device 14 can also be switched to connect the eleventh interface 142 and the twelfth interface 143 to obtain heat from the ambient atmosphere through the fifth heat exchanger 103. When the battery temperature is low, the battery heat exchange device 104 can be bypassed using a bypass pipeline.

[0070] When only the passenger compartment has a heating demand and the battery has no waste heat or even needs to be heated, refer to Figure 9, the thermal management system executes the second heating mode. The connection state of the thermal management system is similar to that of the first heating mode, except that: the first flow direction switching device 15 is in the first working state, the second flow direction switching device 16 is in the first working mode, and the eleventh interface 142 is communicated with the twelfth interface 143. The outlet of the second pump 12, the motor heat exchange device 105, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are communicated in sequence. The outlet of the third pump 11, the eighth heat exchange part 42, the fourth heat exchange part 82, the fifth heat exchanger 103, and the inlet of the third pump 11 are communicated in sequence. The refrigerant in the seventh heat exchange part 41 absorbs heat from the coolant in the eighth heat exchange part 42, the temperature of the coolant decreases, and the coolant flows through the fifth heat exchanger 103 to obtain heat from the ambient atmosphere. The motor heat exchange device 105 and the battery heat exchange device 104 are connected in series to form a loop to heat the battery using the waste heat of the motor.

[0071] In some other embodiments, in the second heating mode, the third multi-way device 13 can also be switched to connect the seventh interface 131, the eighth interface 132, and the ninth interface 133, and the battery is heated by the coolant in the first coolant system.

[0072] When the ambient temperature is extremely low and it is not suitable to turn on the compressor 1 for heating, refer to Figure 10 , the thermal management system executes the third heating mode. The compressor 1, the second pump 12, and the third pump 11 are turned off, the first pump 10 is turned on, and the heating device 106 is turned on to heat the coolant. The outlet of the first pump 10, the heating device 106, the seventh heat exchanger 101, the second heat exchange part 32, and the inlet of the first pump 10 are communicated in sequence, and the heating device 106 is used to achieve heating. When the battery also needs to be heated, the third multi-way device 13 is switched to connect the seventh interface 131, the eighth interface 132, and the ninth interface 133, the first flow direction switching device 15 is set to the first working state, the second flow direction switching device 16 is set to the first working mode, and the second pump 12 is turned on.

[0073] When only the battery has a heating requirement and there is no one in the vehicle, such as the fast charging mode with no one in the vehicle at low temperature, refer to Figure 11 , the thermal management system executes the first battery heating mode. The compressor 1 is turned on, the first throttling device 5 is in the throttling state, the second throttling device 6 is in the cut-off state, the first interface 21, the second interface 22, and the third interface 23 are communicated, and the fourth interface 71, the fifth interface 72, and the sixth interface 73 are communicated. The first pump 10, the second pump 12, and the third pump 11 are turned on, the first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the first working mode, the seventh interface 131 is communicated with the ninth interface 133, and the tenth interface 141 is communicated with the eleventh interface 142.

[0074] Specifically, the outlet of the compressor 1, the first heat exchange part 31, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the compressor 1, the third heat exchange part 81, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the first pump 10, the heating device 106, the fifth heat exchange part 91, the second heat exchange part 32, and the inlet of the first pump 10 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are connected in sequence. The refrigerant in the first heat exchange part 31 releases heat to the coolant in the second heat exchange part 32. The coolant flows through the fifth heat exchange part 91, and the coolant in the fifth heat exchange part 91 releases heat to the coolant in the sixth heat exchange part 92. The refrigerant in the third heat exchange part 81 releases heat to the coolant in the fourth heat exchange part 82. The circulating coolant brings the heat at the fourth heat exchange part 82 and the sixth heat exchange part 92 to the battery heat exchange device 104, thereby realizing battery heating. In the first battery heating mode, both the first heat exchanger 3 and the second heat exchanger 8 are used as condensers, thus accelerating the battery heating effect.

[0075] When only the battery has a heating requirement, and there is no one in the vehicle, but the battery heating requirement is not large, refer to Figure 12 , the thermal management system executes the second battery heating mode. The connection state of the thermal management system is similar to that of the first battery heating mode, with the difference being that: the first interface 21 is connected to the third interface 23, the fourth interface 71 is connected to the fifth interface 72, the first pump 10 is closed, and the first coolant system does not work.

[0076] When the environmental temperature is low and the humidity is high, the windshield is prone to fogging, posing a safety hazard, and there is a need for heating and dehumidification in the passenger compartment. Refer to Figure 13 and 14 , the thermal management system is in the heating and dehumidification mode.

[0077] When there is a need for heating and dehumidification in the passenger compartment, but the heating requirement is small, refer to Figure 13 , the thermal management system executes the first heating and dehumidification mode. The compressor 1 is turned on, the first throttling device 5 is in the throttling state, the second throttling device 6 is in the cut-off state, the first interface 21, the second interface 22, and the third interface 23 are connected, the fourth interface 71, the fifth interface 72, and the sixth interface 73 are connected. The first pump 10 and the second pump 12 are turned on, the third pump 11 is turned off, the first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the second working mode, the seventh interface 131 is connected to the eighth interface 132, and the eleventh interface 142 is connected to the twelfth interface 143.

[0078] Specifically, the outlet of the compressor 1, the first heat exchange section 31, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the compressor 1, the third heat exchange section 81, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the first pump 10, the heating device 106, the seventh heat exchanger 101, the second heat exchange section 32, and the inlet of the first pump 10 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange section 82, the fifth heat exchanger 103, and the inlet of the second pump 12 are connected in sequence. The refrigerant in the first heat exchange section 31 releases heat to the coolant in the second heat exchange section 32. The coolant flows through the seventh heat exchanger 101 and exchanges heat with the air in the air conditioning box 100 to achieve heating of the passenger compartment. The refrigerant in the third heat exchange section 81 releases heat to the coolant in the fourth heat exchange section 82. The heat at the fourth heat exchange section 82 and the motor heat exchange device 105 is released to the atmospheric environment through the fifth heat exchanger 103. In the first heating and dehumidifying mode, the first heat exchanger 3 and the second heat exchanger 8 both act as condensers. The flow rate ratio of the two branches is adjusted through the first multi-way device 2, so as to adjust the heating effect of the passenger compartment and improve the problem of frequent start and stop of the compressor 1 caused by too high outlet air temperature when the heating demand of the passenger compartment is small in spring and autumn.

[0079] When there is a heating demand in the passenger compartment and the heating capacity is too large, or when there is a heating and dehumidifying demand in the passenger compartment and the heating demand is large, refer to Figure 14 , the thermal management system executes the second heating and dehumidifying mode. The compressor 1 is turned on, the first throttling device 5 and the second throttling device 6 are in the throttling state, the first interface 21 and the second interface 22 are connected, and the fourth interface 71 and the sixth interface 73 are connected. The first pump 10, the second pump 12, and the third pump 11 are turned on. The first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the first working mode, the seventh interface 131 is connected to the eighth interface 132, and the tenth interface 141 is connected to the eleventh interface 142.

[0080] Specifically, the outlet of the compressor 1, the first heat exchange part 31, the first throttling device 5, the fourth heat exchanger 102, and the inlet of the compressor 1 are connected in sequence. The outlet of the compressor 1, the first heat exchange part 31, the second throttling device 6, the seventh heat exchange part 41, and the inlet of the compressor 1 are connected in sequence. The outlet of the first pump 10, the heating device 106, the seventh heat exchanger 101, the second heat exchange part 32, and the inlet of the first pump 10 are connected in sequence. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are connected in sequence. The refrigerant in the first heat exchange part 31 releases heat to the coolant in the second heat exchange part 32. The coolant flows through the seventh heat exchanger 101, and the coolant exchanges heat with the air in the air-conditioning box 100 to realize heating of the passenger compartment. The circulating coolant brings the heat at the motor heat exchange device 105 and the motor heat exchange device 105 to the eighth heat exchange part 42. The refrigerant in the seventh heat exchange part 41 absorbs heat from the coolant in the eighth heat exchange part 42.

[0081] In the heating and dehumidifying mode, both the seventh heat exchanger 101 and the fourth heat exchanger 102 exchange heat with the air in the passenger compartment. Since the seventh heat exchanger 101 is located on the downwind side of the fourth heat exchanger 102, the humid air first flows through the fourth heat exchanger 102, and water in the cold air condenses out, drying the air. The dried air then flows through the seventh heat exchanger 101, and the air is heated. The heated and dried air enters the passenger compartment to achieve the effect of heating and dehumidifying.

[0082] In the heating mode and the heating and dehumidifying mode, according to the heating demand, the heating device 106 can be turned on or off. When the heating device 106 is turned on, it heats the coolant for auxiliary heating.

[0083] When only the motor and the battery have heat dissipation requirements and the passenger compartment has no heat management requirements, refer to Figure 15 and the thermal management system operates in the heat dissipation mode. The first pump 10 and the compressor 1 are turned off, and the refrigerant system and the first coolant system do not operate. The second pump 12 and the third pump 11 are turned on. The first flow direction switching device 15 is in the second working state, and the second flow direction switching device 16 is in the first working mode. The eleventh interface 142 is connected to the twelfth interface 143. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, the fifth heat exchanger 103, the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the second pump 12 are connected in sequence. Heat exchange with the atmospheric environment through the fifth heat exchanger 103 to reduce the coolant temperature, thereby realizing heat dissipation of the battery and the motor.

[0084] When only the motor has heat dissipation requirements, the battery has heating requirements, and the passenger compartment has no heat management requirements, refer to Figure 16, the thermal management system operates in the first motor waste heat utilization mode. The connection state of the thermal management system is similar to that of the heat dissipation mode, with the difference being that the tenth interface 141 is connected to the eleventh interface 142, and the motor heat is used to heat the battery.

[0085] When only the motor has a heat dissipation requirement, the battery has a heating requirement, and the passenger compartment has no thermal management requirement, refer to Figure 17 , the thermal management system can also operate in the second motor waste heat utilization mode. The connection state of the thermal management system is similar to that of the heat dissipation mode, with the difference being that the third pump 11 is closed and the first flow direction switching device 15 is in the first working state.

[0086] When the ambient temperature is low and there is no thermal management requirement for the motor, battery, and passenger compartment, refer to Figure 18 , the thermal management system can also operate in the balancing mode. The first pump 10 and the compressor 1 are turned off, and the refrigerant system and the first coolant system do not operate. The second pump 12 and the third pump 11 are turned on. The first flow direction switching device 15 is in the second working state, the second flow direction switching device 16 is in the second working mode, and the tenth interface 141 is connected to the eleventh interface 142. The outlet of the second pump 12, the motor heat exchange device 105, the fourth heat exchange part 82, and the inlet of the second pump 12 are connected in sequence. The outlet of the third pump 11, the eighth heat exchange part 42, the battery heat exchange device 104, the sixth heat exchange part 92, and the inlet of the third pump 11 are connected in sequence. The coolant in the loop where the motor heat exchange device 105 is located circulates to achieve heat storage of the motor. The battery consists of multiple battery cells, and the coolant in the loop where the battery heat exchange device 104 is located circulates to achieve temperature balance of each battery cell and reduce the temperature difference between each battery cell.

[0087] In some other embodiments, only the second pump 12 can be turned on to complete the function of heat storage of the motor. Or only the third pump 11 can be turned on to complete the function of equalizing the temperature of the battery.

[0088] According to another specific embodiment of the thermal management system of the present application, the thermal management system includes a sixth branch. The sixth branch is provided with a stop valve. One port of the sixth branch is connected to the outlet of the compressor 1, and the other port of the sixth branch is connected to the inlet of the compressor 1 or the inlet of the gas-liquid separator 17. When the stop valve is in the conducting state, the high-temperature refrigerant discharged by the compressor 1 directly flows back to the inlet of the compressor 1 through the sixth branch, increasing the intake temperature of the compressor 1, thereby increasing the exhaust temperature of the compressor 1 and improving the heating effect.

[0089] According to yet another specific embodiment of the thermal management system of the present application, the thermal management system includes a seventh branch line, a shut-off valve is provided on the seventh branch line, one port of the seventh branch line is connected to the outlet of the compressor 1, and the other port of the seventh branch line is connected to the outlet of the second throttling device 6 and the inlet of the seventh heat exchange part 41. When the shut-off valve is in the conducting state, the outlet of the compressor 1, the first heat exchange part 31, the second throttling device 6, and the inlet of the compressor 1 are connected, the second throttling device 6 is in the throttling state, and the compressor 1 consumes electrical energy to heat the refrigerant, thereby achieving a heating effect.

[0090] 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 valve parts or other components in addition to the pipeline between the two. Similarly, the "communication" between two components in the present application can be a direct communication or a communication achieved through a pipeline. There can be only a pipeline for communication between the two components, or there can be valve parts or other components between the two for communication after that.

[0091] The present application also provides a control method for a thermal management system. The control method in the present application is applied to the thermal management system in the above-mentioned embodiments. The thermal management system further includes a control system 200, and the control system 200 can be used to control the working states of the refrigerant system and the coolant system.

[0092] Referring to Figure 1 , the control system 200 includes a controller and multiple sensors. The multiple sensors can be used to obtain the working information of the first heat exchanger 3, the third heat exchanger 9, the second heat exchanger 8, the fourth heat exchanger 102, the fifth heat exchanger 103, the sixth heat exchanger 4, the seventh heat exchanger 101, the motor, and the battery. Optionally, the working information includes temperature and pressure. The controller is electrically connected to components such as the compressor 1, the fan in the air conditioning box 100, the fan device at the air intake grille, multiple throttling devices, multiple pumps, multiple multi-way devices, and multiple sensors. The controller can be used to obtain the working information obtained by the sensors. The controller can be used to adjust the working states of the components of the thermal management system. The adjustment of the working state includes at least one of turning on the component, turning off the component, speed adjustment, opening adjustment, and power adjustment. The controller can be used to execute the control method of the thermal management system.

[0093] The control method of the thermal management system includes:

[0094] Obtaining the needs of the passengers and the working information obtained by the sensors;

[0095] According to the needs of the passengers and the working information obtained from the sensors, the controller adjusts the working states of the various components in the thermal management system, so that the thermal management system executes an appropriate air conditioning operation mode, thereby achieving the thermal management of the passenger compartment, the motor, and the battery.

[0096] The thermal management system further includes an interaction device, and the controller is electrically connected to the interaction device. Through the interaction device, the controller can obtain the needs of the passengers, such as the target temperature or operating mode required by the passengers. Optionally, the interaction device can be the control panel of the electric vehicle. The air-conditioning operating mode is each working mode of the above-mentioned thermal management system. The connection state of the thermal management system in the above-mentioned working mode can be referred to the previous description and will not be elaborated here.

[0097] The above are only the preferred embodiments of the present application, and do not impose any formal limitations on the present application. Although the present application has been disclosed above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from 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 still fall within the scope of the technical solution of the present application.

Claims

1. A thermal management system, characterized in that, Comprising: A compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger, a first pump, a second pump, and a first throttling device. The first heat exchanger includes a first heat exchange portion and a second heat exchange portion that are separately arranged. The second heat exchanger includes a third heat exchange portion and a fourth heat exchange portion that are separately arranged. The third heat exchanger includes a fifth heat exchange portion and a sixth heat exchange portion that are separately arranged; The thermal management system has a first refrigeration mode. In the first refrigeration mode, the compressor, the first heat exchange portion, the third heat exchange portion, the first throttling device, and the fourth heat exchanger are connected and refrigerant flows through them. The first throttling device is in a throttling state. The outlet of the first heat exchange portion and / or the outlet of the third heat exchange portion are connected to the inlet of the first throttling device. The outlet of the first throttling device is connected to the inlet of the fourth heat exchanger. The first pump, the second heat exchange portion, and the fifth heat exchange portion are connected and coolant flows through them. The second pump, the fourth heat exchange portion, the sixth heat exchange portion, and the fifth heat exchanger are connected and coolant flows through them. Heat exchange occurs between the first heat exchange portion and the second heat exchange portion, between the third heat exchange portion and the fourth heat exchange portion, and between the fifth heat exchange portion and the sixth heat exchange portion; The thermal management system further includes a second throttling device, a sixth heat exchanger, a seventh heat exchanger, a third pump, and a battery heat exchange device. The sixth heat exchanger includes a seventh heat exchange portion and an eighth heat exchange portion that are separately arranged; The thermal management system has a first battery refrigeration mode. In the first battery refrigeration mode, the compressor, the first heat exchange portion, the third heat exchange portion, the second throttling device, and the seventh heat exchange portion are connected and refrigerant flows through them. The second throttling device is in a throttling state. The outlet of the first heat exchange portion and / or the outlet of the third heat exchange portion are connected to the inlet of the second throttling device. The outlet of the second throttling device is connected to the inlet of the seventh heat exchange portion. The first pump, the second heat exchange portion, and the seventh heat exchanger are connected and coolant flows through them. The second pump, the fourth heat exchange portion, and the fifth heat exchanger are connected and coolant flows through them. The third pump, the eighth heat exchange portion, and the battery heat exchange device are connected and coolant flows through them. Heat exchange occurs between the first heat exchange portion and the second heat exchange portion, between the third heat exchange portion and the fourth heat exchange portion, and between the seventh heat exchange portion and the eighth heat exchange portion.

2. The thermal management system according to claim 1, characterized in that, The thermal management system has a first battery heating mode. In the first battery heating mode, the compressor, the first heat exchanger, the third heat exchanger, the first throttling device, and the fourth heat exchanger are connected and refrigerant flows through them. The first throttling device is in a throttling state. The outlet of the first heat exchanger and / or the outlet of the third heat exchanger are connected to the inlet of the first throttling device. The outlet of the first throttling device is connected to the inlet of the fourth heat exchanger. The first pump, the second heat exchanger, and the fifth heat exchanger are connected and coolant flows through them. The second pump, the third pump, the fourth heat exchanger, the sixth heat exchanger, and the battery heat exchange device are connected and coolant flows through them. Heat exchange occurs between the first heat exchanger and the second heat exchanger, between the third heat exchanger and the fourth heat exchanger, and between the fifth heat exchanger and the sixth heat exchanger.

3. The thermal management system according to claim 1, characterized in that, The thermal management system includes an air conditioning box. The fourth heat exchanger and the seventh heat exchanger are located in the air conditioning box, and the fifth heat exchanger is located outside the air conditioning box. The thermal management system has a first heating and dehumidifying mode. In the first heating and dehumidifying mode, the compressor, the first heat exchanger, the third heat exchanger, the first throttling device, and the fourth heat exchanger are connected and refrigerant flows through them. The first throttling device is in a throttling state. The outlet of the first heat exchanger and / or the outlet of the third heat exchanger are connected to the inlet of the first throttling device. The outlet of the first throttling device is connected to the inlet of the fourth heat exchanger. The first pump, the second heat exchanger, and the seventh heat exchanger are connected and coolant flows through them. The second pump and the fourth heat exchanger and the fifth heat exchanger are connected and coolant flows through them. Heat exchange occurs between the first heat exchanger and the second heat exchanger, and between the third heat exchanger and the fourth heat exchanger.

4. The thermal management system according to claim 1, characterized in that, The thermal management system includes an air conditioning box. The fourth heat exchanger and the seventh heat exchanger are located in the air conditioning box, and the fifth heat exchanger is located outside the air conditioning box. The thermal management system has a second heating and dehumidifying mode. In the second heating and dehumidifying mode, the compressor, the first heat exchanger, the first throttling device, the second throttling device, the seventh heat exchanger, and the fourth heat exchanger are connected and refrigerant flows through them. Both the first throttling device and the second throttling device are in a throttling state. The outlet of the compressor is connected to the inlet of the first heat exchanger. The outlet of the first heat exchanger is respectively connected to the inlet of the first throttling device and the inlet of the second throttling device. The outlet of the first throttling device is connected to the inlet of the fourth heat exchanger. The outlet of the second throttling device is connected to the inlet of the seventh heat exchanger. The first pump, the second heat exchanger, and the seventh heat exchanger are connected and coolant flows through them. The second pump, the third pump, the eighth heat exchanger, and the battery heat exchange device are connected and coolant flows through them. Heat exchange occurs between the first heat exchanger and the second heat exchanger, and between the seventh heat exchanger and the eighth heat exchanger.

5. The thermal management system according to claim 4, wherein, The heat management system includes a motor heat exchange device. In the second heating and dehumidifying mode, the second pump, the third pump, the eighth heat exchange part, the battery heat exchange device and the motor heat exchange device are connected.

6. A thermal management system according to any one of claims 1 to 4, characterized in that The heat management system includes a first multi-way device. The first multi-way device includes a first interface, a second interface and a third interface. The first interface is connected to the outlet of the compressor. The second interface is connected to the inlet of the first heat exchange part. The third interface is connected to the inlet of the third heat exchange part. The first interface is connected to at least one of the second interface and the third interface. The first multi-way device is a three-way proportional valve. The first interface is connected to the second interface and the third interface. The first multi-way device adjusts the flow rate ratio of the flow to the first heat exchange part and the flow to the third heat exchange part.

7. A thermal management system according to any one of claims 3 to 5, characterized in that, The heat management system includes a heating device. The heating device can be connected to the fifth heat exchange part or the seventh heat exchanger. The heating device is used to heat the coolant.

8. The thermal management system according to claim 1, characterized in that, The heat management system includes a motor heat exchange device. The heat management system has a first heating mode. In the first heating mode, the compressor, the first heat exchange part, the second throttling device and the seventh heat exchange part are connected and refrigerant flows through them. The second throttling device is in a throttling state. The outlet of the first heat exchange part is connected to the inlet of the second throttling device. The outlet of the second throttling device is connected to the inlet of the seventh heat exchange part. The first pump, the second heat exchange part and the seventh heat exchanger are connected and coolant flows through them. The second pump, the third pump, the eighth heat exchange part, the motor heat exchange device and the battery heat exchange device are connected and coolant flows through them. The first heat exchange part exchanges heat with the second heat exchange part. The seventh heat exchange part exchanges heat with the eighth heat exchange part.

9. The thermal management system according to claim 1, characterized in that The heat management system has a second heating mode. In the second heating mode, the compressor, the first heat exchange part, the second throttling device and the seventh heat exchange part are connected and refrigerant flows through them. The second throttling device is in a throttling state. The outlet of the first heat exchange part is connected to the inlet of the second throttling device. The outlet of the second throttling device is connected to the inlet of the seventh heat exchange part. The first pump, the second heat exchange part and the seventh heat exchanger are connected and coolant flows through them. The third pump, the eighth heat exchange part and the fifth heat exchanger are connected and coolant flows through them. The first heat exchange part exchanges heat with the second heat exchange part. The seventh heat exchange part exchanges heat with the eighth heat exchange part.

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