Cooling liquid control valve, thermal management system and automobile

Abstract

The invention belongs to the technical field of automobiles, and relates to a cooling liquid control valve, a thermal management system and an automobile, the thermal management system comprises a front end heat dissipation module, a battery pack heat dissipation module, an electric heat dissipation module, an air conditioner module, a cooler module and a cooling liquid control valve; the front-end heat dissipation module, the electric heat dissipation module, the cooler module and the battery pack heat dissipation module are used in cooperation with a cooling liquid control valve, the heat management system achieves multiple cooling liquid circulation modes by rotating a valve element, one cooling liquid circulation mode can be switched every time the cooling liquid control valve rotates by 60 degrees, and the system is simple in structure, convenient to control and low in cost. And different thermal management requirements can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a cooling liquid control valve of a vehicle, a thermal management system and an automobile. BACKGROUND

[0002] With the development of new energy vehicles, the thermal management system of the automobile is also increasingly refined. The thermal management system includes a front-end heat dissipation module, a battery pack heat dissipation module, an electric drive heat dissipation module, an air conditioning module, a cooler module, the structure integration of the multiple modules is low, the overall architecture is very complex, and the pipeline arrangement of the refrigerant and the cooling liquid is relatively complicated and inconvenient to control. SUMMARY

[0003] Based on this, the present application provides a cooling liquid control valve of a vehicle, a thermal management system and an automobile to improve the structure complexity of the existing thermal management system and the inconvenience to control.

[0004] According to the embodiment of the present application, the first aspect provides a thermal management system, comprising:

[0005] a front-end heat dissipation module comprising an external heat exchanger and a low-temperature heat sink;

[0006] an electric drive heat dissipation module comprising a first pump body and a motor assembly connected in series, the first pump body being located on the liquid outlet side of the motor assembly;

[0007] a battery pack heat dissipation module comprising a battery cold plate, a battery heat exchanger and a second pump body connected in series, the battery heat exchanger comprising a first heat exchange plate for passing in cooling liquid and a second heat exchange plate for passing in refrigerant;

[0008] an air conditioning module comprising a gas-liquid separator, a compressor and an internal heat exchanger connected in series, the internal heat exchanger being connected with a front evaporator, a rear evaporator and a heater;

[0009] a cooler module comprising a first cooling plate for passing in cooling liquid and a second cooling plate for passing in refrigerant;

[0010] The cooling liquid control valve comprises a fixed valve body and a rotatable valve core. The valve body is sequentially formed with an alpha valve port, a beta valve port, a gamma valve port, a delta valve port, an epsilon valve port, a zeta valve port and an eta valve port along its circumference. The gamma valve port, the delta valve port, the epsilon valve port, the zeta valve port and the eta valve port are in strip shape, and the central angles between adjacent valve ports are 30°. The valve core is provided with first to third valve channels in arc shape. The central angle of the two ends of the first valve channel is 150°. The second valve channel is located on the inner side of the curved path of the first valve channel and has the same curved direction as the first valve channel. The central angle of the two ends of the second valve channel is 90°. The third valve channel is located on the outer side of the curved path of the first valve channel and has the opposite curved direction as the first valve channel. The central angle of the two ends of the third valve channel is 60°, and is used to connect two adjacent valve ports of the valve body.

[0011] The first end of the low-temperature radiator is connected to the alpha valve port through a first cooling liquid pipeline, and the second end of the low-temperature radiator is connected to the beta valve port through a second cooling liquid pipeline. The liquid outlet end of the motor assembly is connected to the second cooling liquid pipeline, so as to be connected to the beta valve port through the second cooling liquid pipeline. The liquid outlet end of the first pump body is connected to the gamma valve port through a third cooling liquid pipeline. The liquid inlet end of the battery cold plate is connected to the delta valve port through a fourth cooling liquid pipeline. The liquid outlet end of the second pump body is connected to the epsilon valve port through a fifth cooling liquid pipeline. The liquid inlet end of the first cooling plate is connected to the zeta valve port through a sixth cooling liquid pipeline. The liquid outlet end of the first cooling plate is connected to the eta valve port through a seventh cooling liquid pipeline.

[0012] The rotation angle of the valve core is controlled to be 60° each time, so as to adjust the circulation mode of the cooling liquid in the front-end heat dissipation module, the electric drive heat dissipation module, the battery pack heat dissipation module and the cooler module.

[0013] In some embodiments, the circulation mode of the cooling liquid comprises a battery pack-electric drive circulation mode. The valve core is 0°. The first valve channel connects the beta valve port and the epsilon valve port. The second valve channel connects the gamma valve port and the delta valve port. The third valve channel connects the zeta valve port and the eta valve port, so as to circulate the cooling liquid in the battery pack heat dissipation module and the electric drive heat dissipation module.

[0014] In some embodiments, the circulation mode of the cooling liquid comprises a battery pack-cooler circulation mode. The valve core is rotated by 60°. The first valve channel connects the delta valve port and the eta valve port. The second valve channel connects the alpha valve port and the gamma valve port. The third valve channel connects the epsilon valve port and the zeta valve port, so as to circulate the cooling liquid in the battery pack heat dissipation module and the cooler module.

[0015] In some embodiments, the circulation mode of the cooling liquid includes a battery pack-cooler circulation and a battery pack self-circulation mode, the spool is rotated by 120°, the first valve passage is in communication with the ζ valve port and the γ valve port, the second valve passage is in communication with the β valve port and the η valve port, and the third valve passage is in communication with the δ valve port and the ε valve port, so that the cooling liquid is circulated in the electric drive heat dissipation module and the cooler module and self-circulated in the battery pack heat dissipation module.

[0016] In some embodiments, the circulation mode of the cooling liquid includes a battery pack-front end heat dissipation-electric drive circulation mode, the spool is rotated by 180°, the first valve passage is in communication with the α valve port and the ε valve port, the second valve passage is in communication with the ζ valve port and the η valve port, and the third valve passage is in communication with the γ valve port and the δ valve port, so that the cooling liquid is circulated in the battery pack heat dissipation module, the front end heat dissipation module and the electric drive heat dissipation module.

[0017] In some embodiments, the circulation mode of the cooling liquid includes a battery pack-cooler circulation and an electric drive self-circulation mode, the spool is rotated by 240°, the first valve passage is in communication with the δ valve port and the η valve port, the second valve passage is in communication with the ε valve port and the ζ valve port, and the third valve passage is in communication with the β valve port and the γ valve port, so that the cooling liquid is circulated in the battery pack heat dissipation module and the cooler module and self-circulated in the electric drive heat dissipation module.

[0018] In some embodiments, a refrigerant control valve is arranged between the front end heat dissipation module, the battery pack heat dissipation module, the air conditioner module and the cooler module; one side of the refrigerant control valve includes a C interface, a G interface, an E interface, an A interface and an I interface arranged in sequence, and the other side includes a B interface, an F interface, an H interface and a D interface arranged in sequence.

[0019] The liquid outlet end of the internal heat exchanger is connected to the A interface through a first refrigerant pipeline, the liquid inlet end of the second heat exchange plate is connected to the B interface through a second refrigerant pipeline; the liquid outlet end of the second heat exchange plate is connected to the C interface through a third refrigerant pipeline; the first end of the external heat exchanger is connected to the D interface through a fourth refrigerant pipeline; the liquid outlet ends of the front evaporator and the rear evaporator are connected to the E interface through a fifth refrigerant pipeline; the liquid inlet ends of the front evaporator, the rear evaporator and the second cooling plate are connected to the F interface through a sixth refrigerant pipeline, wherein the liquid inlet end of the front evaporator is provided with a first expansion valve, the liquid inlet end of the rear evaporator is provided with a second expansion valve, the liquid inlet end of the second cooling plate is provided with a third expansion valve, and the liquid outlet end of the second cooling plate is connected to the liquid inlet end of the gas-liquid separator; the second end of the external heat exchanger is connected to the G interface through a seventh refrigerant pipeline; the eighth refrigerant pipeline between the rear evaporator and the second expansion valve is connected to the H interface; the ninth refrigerant pipeline between the compressor and the internal heat exchanger is connected to the I interface.

[0020] In some embodiments, when heating, the A interface is connected to the B interface, the C interface is connected to the F interface, the D interface is connected to the E interface, and the G interface is connected to the H interface; when cooling, the B interface, the C interface, the E interface and the H interface are disconnected, the A interface and the I interface are connected to the D interface, and the G interface is connected to the F interface.

[0021] According to the embodiments of the present application, the second aspect provides a cooling liquid control valve configured in the aforementioned thermal management system, the cooling liquid control valve comprises a fixed valve body and a rotatable valve core, the valve body is sequentially formed with an alpha valve port, a beta valve port, a gamma valve port, a delta valve port, an epsilon valve port, a zeta valve port and an eta valve port along the circumference thereof, wherein the gamma valve port, the delta valve port, the epsilon valve port, the zeta valve port and the eta valve port are in strip shape, and the central angle between adjacent valve ports is 30°; the valve core is provided with first to third valve channels in arc shape, wherein the central angle of both ends of the first valve channel is 150°; the second valve channel is located on the inner side of the curved path of the first valve channel and has the same curved direction as the first valve channel, and the central angle of both ends of the second valve channel is 90°; the third valve channel is located on the outer side of the curved path of the first valve channel and has the opposite curved direction as the first valve channel, and the central angle of both ends of the third valve channel is 60°, so as to connect two adjacent valve ports of the valve body.

[0022] According to the embodiments of the present application, the third aspect provides an automobile configured with the aforementioned thermal management system.

[0023] In the thermal management system of the present application, the front-end heat dissipation module, the electric drive heat dissipation module, the cooler module and the battery pack heat dissipation module are used in cooperation with the cooling liquid control valve, and the thermal management system realizes multiple cooling liquid circulation modes by rotating the valve core, and the cooling liquid control valve can switch one cooling liquid circulation mode every 60° of rotation, which has simple structure and is convenient to control, and can meet different thermal management requirements. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a structural schematic diagram of the thermal management system of the present application in a heating state;

[0025] Figure 2 FIG. 2 is a structural schematic diagram of the thermal management system of the present application in a cooling state;

[0026] Figure 3 FIG. 3 is a structural schematic diagram of the cooling liquid control valve of the present application;

[0027] Figure 4 FIG. 4 is a structural schematic diagram of the battery pack-electric drive circulation mode of the present application;

[0028] Figure 5 Structure schematic diagram of battery pack-cooler circulation mode of the embodiment

[0029] Figure 6 Structure schematic diagram of battery pack-cooler circulation and battery pack self-circulation mode of the embodiment

[0030] Figure 7 Structure schematic diagram of battery pack-cooler circulation and electric drive self-circulation mode of the embodiment

[0031] Figure 8 Structure schematic diagram of battery pack-front end heat dissipation-electric drive circulation mode of the embodiment

[0032] Figure 9 Structure schematic diagram of refrigerant control valve.

[0033] In the figure: external heat exchanger 10; low-temperature heat sink 11; external fan 12; active air inlet grille 13; first pump body 20; first motor 21; second motor 22; second pump body 30; battery cold plate 31; first heat exchange plate 32; second heat exchange plate 33; compressor 40; gas-liquid separator 41; internal heat exchanger 42; front evaporator 43; rear evaporator 44; heater 45; first cooling plate 50; second cooling plate 51; cooling liquid control valve 60; first valve channel 601; second valve channel 602; third valve channel 603; refrigerant control valve 61; first expansion valve 62; second expansion valve 63; third expansion valve 64; first cooling liquid pipeline 71; second cooling liquid pipeline 72; third cooling liquid pipeline 73; fourth cooling liquid pipeline 74; fifth cooling liquid pipeline 75; sixth cooling liquid pipeline 76; seventh cooling liquid pipeline 77; first refrigerant pipeline 81; second refrigerant pipeline 82; third refrigerant pipeline 83; fourth refrigerant pipeline 84; fifth refrigerant pipeline 85; sixth refrigerant pipeline 86; seventh refrigerant pipeline 87; eighth refrigerant pipeline 88; ninth refrigerant pipeline 89. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0035] The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the defined conditions under which the present application can be implemented. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0036] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "lateral," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Example 1

[0038] like Figures 1-2 As shown, this embodiment provides a thermal management system configured in an automobile. The thermal management system includes a front-end heat dissipation module, a battery pack heat dissipation module, an electric drive heat dissipation module, an air conditioning module, a cooler module, and a coolant control valve 60.

[0039] The front-end heat dissipation module of this embodiment includes an external heat exchanger 10, a low-temperature radiator 11, and an external fan 12 disposed near the active air intake grille 13. The external fan 12 is used to generate airflow through the external heat exchanger 10 and the low-temperature radiator 11 so that the air can fully exchange heat with the refrigerant in the external heat exchanger 10 and the coolant in the low-temperature radiator 11.

[0040] The electric drive cooling module of this embodiment includes a motor assembly connected in series and a first pump body 20. The first pump body 20 drives the coolant to flow through the motor assembly to regulate the temperature. The first pump body 20 is located on the outlet side of the motor assembly. The motor assembly in this embodiment preferably includes a first motor 21 and a second motor 22 connected in parallel. The inlet end of the first motor 21 is provided with a liquid cooling distribution device, and the inlet end of the second motor 22 is provided with a power module and a throttle valve arranged in parallel.

[0041] The battery pack heat dissipation module of this embodiment includes a battery cold plate 31, a battery heat exchanger, and a second pump 30 connected in series. The second pump 30 drives the coolant to circulate through the battery heat exchanger and the battery cold plate 31 to regulate the temperature of the battery pack. The battery heat exchanger includes a first heat exchange plate 32 and a second heat exchange plate 33. The inlet end of the first heat exchange plate 32 is connected to the battery cold plate 31, and the outlet end of the first heat exchange plate 32 is connected to the inlet end of the second pump 30. The coolant circulates between the battery cold plate 31 and the first heat exchange plate 32 under the drive of the second pump 30. The refrigerant introduced into the second heat exchange plate 33 exchanges heat with the coolant in the first heat exchange plate 32. In this embodiment, the second pump 30 is preferably a heating pump, so that the battery pack heat dissipation module has a heating function, which is beneficial to the temperature regulation of the battery pack.

[0042] The air conditioner module of the embodiment comprises a compressor 40, a gas-liquid separator 41, an internal heat exchanger 42, a front evaporator 43, a rear evaporator 44 and a heater 45, wherein the gas-liquid separator 41, the compressor 40 and the internal heat exchanger 42 are arranged in series, the liquid outlet end of the gas-liquid separator 41 is connected to the liquid inlet end of the compressor 40, the liquid inlet end of the gas-liquid separator 41 is connected to the liquid outlet end of the front evaporator 43 and the rear evaporator 44, the liquid inlet end of the internal heat exchanger 42 is connected to the liquid outlet end of the compressor 40, the liquid inlet end of the front evaporator 43 is provided with a first expansion valve 62, and the liquid inlet end of the rear evaporator 44 is provided with a second expansion valve 63. The front evaporator 43 and the rear evaporator 44 are connected to the internal heat exchanger 42 and the heater 45 to cool or heat the passenger compartment.

[0043] The cooler module of the embodiment comprises a first cooling plate 50 and a second cooling plate 51, the first cooling plate 50 is used to pass in cooling liquid, and the second cooling plate 51 is used to pass in refrigerant to exchange heat with the cooling liquid in the first cooling plate 50. It should be noted that the structures of the front-end heat dissipation module, the battery pack heat dissipation module, the electric drive heat dissipation module, the air conditioner module and the cooler module of the embodiment are all prior art, and the embodiment will not be described in detail.

[0044] The front-end heat dissipation module, the battery pack heat dissipation module, the electric drive heat dissipation module and the cooler module of the embodiment are connected through a cooling liquid control valve 60. For details, see Figure 3 The cooling liquid control valve 60 comprises a fixed valve body and a rotatable valve core, the valve body is sequentially formed with an alpha valve port, a beta valve port, a gamma valve port, a delta valve port, an epsilon valve port, a zeta valve port and an eta valve port along the circumference thereof, wherein the gamma valve port, the delta valve port, the epsilon valve port, the zeta valve port and the eta valve port are in strip shape, and the central angles between adjacent valve ports are 30°. The valve core is provided with first to third valve channels 603 in arc shape, wherein the central angles of the two ends of the first valve channel 601 are 150°; the second valve channel 602 is located on the inner side of the curved path of the first valve channel 601 and has the same curved direction as the first valve channel 601, the central angles of the two ends of the second valve channel 602 are 90°; the third valve channel 603 is located on the outer side of the curved path of the first valve channel 601 and has the opposite curved direction as the first valve channel 601, the central angles of the two ends of the third valve channel 603 are 60°, and is used to connect two adjacent valve ports of the valve body.

[0045] In the front-end heat dissipation module, the first end of the low-temperature heat sink 11 is connected to the a valve port of the cooling liquid control valve 60 through the first cooling liquid pipeline 71, and the second end of the low-temperature heat sink 11 is connected to the β valve port of the cooling liquid control valve 60 through the second cooling liquid pipeline 72. In the electric drive heat dissipation module, the liquid inlet end of the motor assembly is connected to the second cooling liquid pipeline 72 to communicate to the β valve port of the cooling liquid control valve 60 through the second cooling liquid pipeline 72, and the liquid outlet end of the first pump body 20 is connected to the γ valve port of the cooling liquid control valve 60 through the third cooling liquid pipeline 73. In the battery pack heat dissipation module, the liquid inlet end of the battery cold plate 31 is connected to the δ valve port of the cooling liquid control valve 60 through the fourth cooling liquid pipeline 74, and the liquid outlet end of the second pump body 30 is connected to the ε valve port of the cooling liquid control valve 60 through the fifth cooling liquid pipeline 75. In the cooler module, the liquid inlet end of the first cooling plate 50 is connected to the ζ valve port of the cooling liquid control valve 60 through the sixth cooling liquid pipeline 76, and the liquid outlet end of the first cooling plate 50 is connected to the η valve port of the cooling liquid control valve 60 through the seventh cooling liquid pipeline 77.

[0046] The cooling liquid pipelines of the front-end heat dissipation module, the electric drive heat dissipation module, the battery pack heat dissipation module, the cooler module and the air conditioner module of the embodiment are connected through the cooling liquid control valve 60. By rotating the valve core of the cooling liquid control valve 60 to different angles, various cooling liquid circulation modes can be realized. The cooling liquid circulation modes include:

[0047] The battery pack-electric drive circulation mode, at this time the valve core is 0°, see Figure 4 , the first valve channel 601 of the valve core communicates the β valve port and the ε valve port, the second valve channel 602 communicates the γ valve port and the δ valve port, and the third valve channel 603 communicates the ζ valve port and the η valve port. The cooling liquid can circulate in the battery pack heat dissipation module and the electric drive heat dissipation module. The cooling liquid in the electric drive heat dissipation module first flows into the battery pack heat dissipation module through the γ valve port, the second valve channel 602 and the δ, and then returns to the electric drive heat dissipation module through the ε valve port, the first valve channel 601 and the β valve port.

[0048] The battery pack-cooler circulation mode, at this time the valve core is rotated by 60°, see Figure 5 , the first valve channel 601 of the valve core communicates the δ valve port and the η valve port, the second valve channel 602 communicates the α valve port and the γ valve port, and the third valve channel 603 communicates the ε valve port and the ζ valve port. The cooling liquid can circulate in the battery pack heat dissipation module and the cooler module. The cooling liquid in the battery pack heat dissipation module first flows into the cooler module through the ε valve port, the third valve channel 603 and the ζ valve port, and then returns to the battery pack heat dissipation module through the δ valve port, the first valve channel 601 and the η valve port.

[0049] The battery pack-cooler circulation and battery pack self-circulation mode, at this time the valve core is rotated by 120°, see Figure 6, the first valve channel 601 of the valve core is connected with the ζ valve port and the γ valve port, the second valve channel 602 is connected with the β valve port and the η valve port, and the third valve channel 603 is connected with the δ valve port and the ε valve port. The coolant can circulate in the electric drive heat dissipation module and the cooler module and self-circulate in the battery pack heat dissipation module. When the coolant circulates in the electric drive heat dissipation module and the cooler module, the coolant in the electric drive heat dissipation module flows into the cooler module through the ζ valve port, the first valve channel 601 and the γ valve port, and then flows back to the electric drive heat dissipation module through the η valve port, the second valve channel 602 and the β valve port. When the coolant self-circulates in the battery pack heat dissipation module, the coolant in the battery pack heat dissipation module flows into the coolant control valve 60 through the ε valve port, and then flows back to the battery pack heat dissipation module through the third valve channel 603 and the δ valve port.

[0050] The battery pack-front end heat dissipation-electric drive circulation mode, at this time, the valve core is rotated by 180°, and specific reference can be made to Figure 7 , the first valve channel 601 of the valve core is connected with the α valve port and the ε valve port, the second valve channel 602 is connected with the ζ valve port and the η valve port, and the third valve channel 603 is connected with the γ valve port and the δ valve port. The coolant can circulate in the battery pack heat dissipation module, the front end heat dissipation module and the electric drive heat dissipation module. The coolant in the battery pack heat dissipation module flows into the front end heat dissipation module through the ε valve port, the first valve channel 601 and the α valve port, and then flows into the electric drive heat dissipation module, and finally flows back to the battery pack heat dissipation module through the γ valve port, the third valve channel 603 and the δ valve port.

[0051] The battery pack-cooler circulation and electric drive self-circulation mode, at this time, the valve core is rotated by 240°, and specific reference can be made to Figure 8 , the first valve channel 601 of the valve core is connected with the δ valve port and the η valve port, the second valve channel 602 is connected with the ε valve port and the ζ valve port, and the third valve channel 603 is connected with the β valve port and the γ valve port. The coolant can circulate in the battery pack heat dissipation module and the cooler module and self-circulate in the electric drive heat dissipation module. When the coolant circulates in the battery pack heat dissipation module and the cooler module, the coolant in the battery pack heat dissipation module flows into the cooler module through the ε valve port, the second valve channel 602 and the ζ valve port, and then flows back to the battery pack heat dissipation module through the η valve port, the first valve channel 601 and the δ valve port. When the coolant self-circulates in the electric drive heat dissipation module, the coolant in the electric drive heat dissipation module flows into the coolant control valve 60 through the γ valve port, and then flows back to the electric drive heat dissipation module through the third valve channel 603 and the β valve port.

[0052] The coolant control valve 60 of the embodiment is designed for the front end heat dissipation module, the electric drive heat dissipation module, the cooler module and the battery pack heat dissipation module arranged in the embodiment. The heat management system can realize various coolant circulation modes by rotating the valve core. The coolant control valve 60 can switch one coolant circulation mode every 60° of rotation, has a simple structure, is convenient to control, and can meet different heat management requirements.

[0053] The refrigerant pipelines between the front-end heat dissipation module, the battery pack heat dissipation module, the air conditioner module and the cooler module of the embodiment are connected through the refrigerant control valve 61. Specifically, referring to Figure 9 , one side of the refrigerant control valve 61 comprises C interface, G interface, E interface, A interface and I interface distributed in sequence; the other side of the refrigerant control valve 61 comprises B interface, F interface, H interface and D interface distributed in sequence. Among them, the liquid outlet end of the internal heat exchanger 42 is connected to the A interface through the first refrigerant pipeline 81; the liquid inlet end of the second heat exchange plate 33 is connected to the B interface through the second refrigerant pipeline 82; the liquid outlet end of the second heat exchange plate 33 is connected to the C interface through the third refrigerant pipeline 83; the first end of the external heat exchanger 10 is connected to the D interface through the fourth refrigerant pipeline 84; the liquid outlet end of the front evaporator 43 and the rear evaporator 44 is connected to the E interface through the fifth refrigerant pipeline 85; the liquid inlet end of the front evaporator 43, the rear evaporator 44 and the second cooling plate 51 is connected to the F interface through the sixth refrigerant pipeline 86, the liquid inlet end of the second cooling plate 51 is provided with the third expansion valve 64, and the liquid outlet end of the second cooling plate 51 is connected to the liquid inlet end of the gas-liquid separator 41; the second end of the external heat exchanger 10 is connected to the G interface through the seventh refrigerant pipeline 87; the rear evaporator 44 and the second expansion valve 63 are provided with the eighth refrigerant pipeline 88 connected to the H interface; the compressor 40 and the internal heat exchanger 42 are provided with the ninth refrigerant pipeline 89 connected to the I interface.

[0054] Specifically, referring to Figure 1 , when heating, the A interface is communicated to the B interface, the C interface is communicated to the F interface, the D interface is communicated to the E interface, and the G interface is communicated to the H interface. In the air conditioner module, the refrigerant output by the internal heat exchanger 42 can first flow into the second heat exchange plate 33 of the battery module through the first refrigerant pipeline 81, the A interface, the B interface and the second refrigerant pipeline 82; then flow into the second cooling plate 51 of the cooling module and / or the front evaporator 43 and / or the rear evaporator 44 of the air conditioner module and / or the eighth refrigerant pipeline 88 through the third refrigerant pipeline 83, the C interface, the F interface and the sixth pipeline; the refrigerant in the second cooling plate 51, the front evaporator 43 and the rear evaporator 44 can flow back to the gas-liquid separator 41, and the refrigerant in the eighth refrigerant pipeline 88 first flows into the external heat exchanger 10 of the front-end heat dissipation module through the H interface, the G interface and the seventh refrigerant pipeline 87; and then flows back to the gas-liquid separator 41 through the fourth refrigerant pipeline 84, the D interface, the E interface and the seventh refrigerant pipeline 87.

[0055] Specifically, referring to Figure 2In the cooling mode, the B interface, the C interface, the E interface and the H interface are disconnected, the A interface and the I interface are connected to the D interface, and the G interface is connected to the F interface. In the air conditioning module, the refrigerant output by the compressor 40 first flows into the refrigerant control valve 61 through the ninth refrigerant pipeline 89 and / or through the internal heat exchanger 42 and the first refrigerant pipeline 81; then flows into the external heat exchanger 10 of the front heat dissipation module through the D interface and the fourth refrigerant pipeline 84; next flows into the refrigerant control valve 61 through the seventh refrigerant pipeline 87 and the G interface; then flows through the second cooling plate 51 and / or the front evaporator 43 and / or the rear evaporator 44 through the F interface and the sixth pipeline; the refrigerant in the second cooling plate 51, the front evaporator 43 and the rear evaporator 44 can flow back to the gas-liquid separator 41. The refrigerant control valve 61 of the embodiment can reduce the joints and valves between the pipelines, making the control of the thermal management system more convenient.

[0056] The thermal management system of the embodiment also preferably comprises a liquid storage tank, which is provided with a liquid supplement pipeline connected to the liquid inlet end of the first pump body 20 of the electric heat dissipation module, a first liquid return pipeline connected to the liquid inlet end of the first heat exchange plate 32 in the battery pack heat dissipation module, and a second liquid return pipeline connected to the second end of the low-temperature radiator 11. The liquid storage tank can supply cooling liquid to the thermal management system, ensuring the effective operation of the thermal management system.

[0057] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0058] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A thermal management system, comprising: The front-end heat dissipation module includes an external heat exchanger (10) and a low-temperature heat sink (11); An electric drive cooling module includes a first pump body (20) and a motor assembly connected in series, wherein the first pump body (20) is located at the liquid outlet end of the motor assembly; The battery pack heat dissipation module includes a battery cold plate (31), a battery heat exchanger and a second pump body (30) connected in series. The battery heat exchanger includes a first heat exchange plate (32) for introducing coolant and a second heat exchange plate (33) for introducing refrigerant. An air conditioning module includes a gas-liquid separator (41), a compressor (40) and an internal heat exchanger (42) connected in series, the internal heat exchanger (42) being connected to a front evaporator (43), a rear evaporator (44) and a heater (45); The cooler module includes a first cooling plate (50) for introducing coolant and a second cooling plate (51) for introducing refrigerant; A coolant control valve (60) includes a fixed valve body and a rotatable valve core. The valve body has α, β, γ, δ, ε, ζ, and η valve ports sequentially formed along its circumference. The γ, δ, ε, ζ, and η valve ports are strip-shaped, and the central angle between adjacent valve ports is 30°. The valve core has first to third arc-shaped valve channels, where the central angle at both ends of the first valve channel (601) is 150°. The second valve channel (602) is located inside the curved path of the first valve channel (601) and has the same curvature direction as the first valve channel (601). The central angles at both ends of the second valve channel (602) are 90°. The third valve channel (603) is located outside the curved path of the first valve channel (601) and has the opposite curvature direction to the first valve channel (601). The central angles at both ends of the third valve channel (603) are 60°, and it is used to connect two adjacent valve ports of the valve body. The first end of the low-temperature radiator (11) is connected to the α valve port through the first coolant pipe (71), and the second end of the low-temperature radiator (11) is connected to the β valve port through the second coolant pipe (72); the outlet end of the motor assembly is connected to the second coolant pipe (72) to be connected to the β valve port through the second coolant pipe (72); the outlet end of the first pump body (20) is connected to the γ valve port through the third coolant pipe (73); the inlet end of the battery cold plate (31) is connected to the δ valve port through the fourth coolant pipe (74); the outlet end of the second pump body (30) is connected to the ε valve port through the fifth coolant pipe (75); the inlet end of the first cooling plate (50) is connected to the ζ valve port through the sixth coolant pipe (76); and the outlet end of the first cooling plate (50) is connected to the η valve port through the seventh coolant pipe (77). By controlling the valve core to rotate at an angle of 60° each time, the circulation mode of the coolant in the front-end heat dissipation module, the electric drive heat dissipation module, the battery pack heat dissipation module, and the cooler module is adjusted.

2. The thermal management system according to claim 1, characterized in that: The coolant circulation mode includes a battery pack-electric drive circulation mode. The valve core is at 0°. The first valve channel (601) is connected to the β valve port and the ε valve port. The second valve channel (602) is connected to the γ valve port and the δ valve port. The third valve channel (603) is connected to the ζ valve port and the η valve port, so that the coolant circulates in the battery pack heat dissipation module and the electric drive heat dissipation module.

3. The thermal management system according to claim 2, characterized in that: The coolant circulation mode includes a battery pack-cooler circulation mode. The valve core rotates 60°, the first valve channel (601) connects the δ valve port and the η valve port, the second valve channel (602) connects the α valve port and the γ valve port, and the third valve channel (603) connects the ε valve port and the ζ valve port, so that the coolant circulates in the battery pack heat dissipation module and the cooler module.

4. The thermal management system according to claim 3, characterized in that: The coolant circulation mode includes battery pack-cooler circulation and battery pack self-circulation. The valve core rotates 120°, the first valve channel (601) connects the ζ valve port and the γ valve port, the second valve channel (602) connects the β valve port and the η valve port, and the third valve channel (603) connects the δ valve port and the ε valve port, so that the coolant circulates in the electric drive heat dissipation module and the cooler module and self-circulates in the battery pack heat dissipation module.

5. The thermal management system according to claim 4, characterized in that: The coolant circulation mode includes a battery pack-front-end heat dissipation-electric drive circulation mode. The valve core rotates 180°, the first valve channel (601) connects to the α valve port and the ε valve port, the second valve channel (602) connects to the ζ valve port and the η valve port, and the third valve channel (603) connects to the γ valve port and the δ valve port, so that the coolant circulates in the battery pack heat dissipation module, the front-end heat dissipation module and the electric drive heat dissipation module.

6. The thermal management system according to claim 5, characterized in that: The coolant circulation mode includes battery pack-cooler circulation and electric drive self-circulation mode. The valve core rotates 240°. The first valve channel (601) connects the δ valve port and the η valve port, the second valve channel (602) connects the ε valve port and the ζ valve port, and the third valve channel (603) connects the β valve port and the γ valve port, so that the coolant circulates in the battery pack heat dissipation module and the cooler module and self-circulates in the electric drive heat dissipation module.

7. The thermal management system according to any one of claims 1-6, characterized in that: A refrigerant control valve (61) is provided between the front-end heat dissipation module, the battery pack heat dissipation module, the air conditioning module and the cooler module; one side of the refrigerant control valve (61) includes C interface, G interface, E interface, A interface and I interface distributed in sequence, and the other side includes B interface, F interface, H interface and D interface distributed in sequence. The liquid outlet of the internal heat exchanger (42) is connected to port A via a first refrigerant pipe (81), and the liquid inlet of the second heat exchange plate (33) is connected to port B via a second refrigerant pipe (82); the liquid outlet of the second heat exchange plate (33) is connected to port C via a third refrigerant pipe (83); the first end of the external heat exchanger (10) is connected to port D via a fourth refrigerant pipe (84); the liquid outlets of the front evaporator (43) and the rear evaporator (44) are connected to port E via a fifth refrigerant pipe (85); the liquid inlets of the front evaporator (43), the rear evaporator (44), and the second cooling plate (51) are connected to port F via a sixth refrigerant pipe (86). The inlet of the front evaporator (43) is provided with a first expansion valve (62), the inlet of the rear evaporator (44) is provided with a second expansion valve (63), the inlet of the second cooling plate (51) is provided with a third expansion valve (64), and the outlet of the second cooling plate (51) is connected to the inlet of the gas-liquid separator (41); the second end of the external heat exchanger (10) is connected to the G interface through the seventh refrigerant pipe (87); the rear evaporator (44) and the second expansion valve (63) are provided with an eighth refrigerant pipe (88) connected to the H interface; the compressor (40) and the internal heat exchanger (42) are provided with a ninth refrigerant pipe (89) connected to the I interface.

8. The thermal management system according to claim 7, characterized in that: During heating, interface A is connected to interface B, interface C is connected to interface F, interface D is connected to interface E, and interface G is connected to interface H; during cooling, interface B, interface C, interface E, and interface H are disconnected, interface A and interface I are connected to interface D, and interface G is connected to interface F.

9. A coolant control valve (60), the coolant control valve (60) being configured in a thermal management system according to any one of claims 1-8, the coolant control valve (60) comprising a fixed valve body and a rotatable valve core, the valve body having α valve port, β valve port, γ valve port, δ valve port, ε valve port, ζ valve port and η valve port sequentially formed along its circumference, wherein the γ valve port, δ valve port, ε valve port, ζ valve port and η valve port are strip-shaped, and the central angle between adjacent valve ports is 30°; the valve core has first to third arc-shaped valve channels, which... The central angles at both ends of the first valve channel (601) are 150°; the second valve channel (602) is located inside the curved path of the first valve channel (601) and has the same curvature direction as the first valve channel (601), and the central angles at both ends of the second valve channel (602) are 90°; the third valve channel (603) is located outside the curved path of the first valve channel (601) and has the opposite curvature direction to the first valve channel (601), and the central angles at both ends of the third valve channel (603) are 60°, used to connect two adjacent valve ports of the valve body.

10. A car, characterized in that, The vehicle is equipped with a thermal management system as described in any one of claims 1-8.

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