Thermal management system and vehicle

Abstract

The invention provides a thermal management system and a vehicle. The thermal management system comprises a battery flow path, an electric drive flow path, an expansion kettle and a switching valve. The battery flow path includes a battery fluid pump. The electric drive flow path comprises an electric drive liquid pump. The expansion kettle comprises a first liquid supplementing opening and a second liquid supplementing opening which are communicated. When the switching valve is in a first state, the battery flow path is communicated with the electric drive flow path, so that a first cooling liquid loop flowing through the battery flow path and the expansion kettle and a second cooling liquid loop flowing through the electric drive flow path and the expansion kettle are formed. And the battery liquid pump is used for realizing circulating flow of the cooling liquid in the first cooling liquid loop. And the electric drive liquid pump is used for realizing circulating flow of the cooling liquid in the second cooling liquid loop. When the switching valve is in the second state, the battery flow path is separated from the electric drive flow path, and the expansion kettle is used for supplementing water to the battery liquid pump and the electric drive liquid pump through the first liquid supplementing opening and the second liquid supplementing opening respectively. Therefore, the heat leakage amount of the heat management system is reduced.

Description

Technical Field

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

[0002] The thermal management system of a vehicle is a system designed to control the temperature and heat distribution inside the vehicle. The expansion water tank in the thermal management system can play a role in replenishing coolant and exhausting air. Some expansion water tanks are connected in series in the coolant flow path where the battery is located. In this way, the coolant in the coolant flow path where the battery is located exchanges heat with the coolant in the coolant flow path where the electric drive assembly is located, increasing the heat leakage. Summary of the Invention

[0003] The present application provides a thermal management system and a vehicle.

[0004] The present application provides a thermal management system, which includes:

[0005] A battery flow path, including a battery liquid pump;

[0006] An electric drive flow path, including an electric drive liquid pump;

[0007] An expansion water tank, including a first liquid replenishing port and a second liquid replenishing port that are communicated. The first liquid replenishing port is connected to the liquid inlet of the battery liquid pump, and the second liquid replenishing port is connected to the liquid inlet of the electric drive liquid pump; and

[0008] A switching valve, to which the battery flow path and the electric drive flow path are connected; the switching valve includes a first state and a second state; when the switching valve is in the first state, the battery flow path and the electric drive flow path are communicated to form a first coolant circuit flowing through the battery flow path and the expansion water tank, and a second coolant circuit flowing through the electric drive flow path and the expansion water tank; the battery liquid pump is used to circulate the coolant in the first coolant circuit; the electric drive liquid pump is used to circulate the coolant in the second coolant circuit; when the switching valve is in the second state, the battery flow path and the electric drive flow path are separated, and the expansion water tank is used to supply water to the battery liquid pump and the electric drive liquid pump respectively through the first liquid replenishing port and the second liquid replenishing port.

[0009] Further, the thermal management system further includes a heat dissipation flow path connected to the switching valve. The heat dissipation flow path includes a radiator, one port of the radiator is connected to the switching valve, and the other port of the radiator is connected between the switching valve and the liquid inlet of the electric drive liquid pump;

[0010] When the switching valve is in the first state, the battery flow path, the heat dissipation flow path, and the electric drive flow path are connected, and the first coolant circuit flows through the heat dissipation flow path; when the switching valve is in the second state, the heat dissipation flow path is connected to the electric drive flow path.

[0011] Further, the expansion water tank further includes an exhaust port, the radiator is connected to the exhaust port, and the exhaust port is used to discharge the gas in the radiator.

[0012] Further, the thermal management system further includes a refrigerant circuit and a first heat exchange flow path connected to the switching valve; the refrigerant circuit includes a first heat exchanger and a compressor, and the first heat exchanger is connected to the intake port of the compressor; the first heat exchange flow path passes through the first heat exchanger;

[0013] When the switching valve is in the first state, the battery flow path, the first heat exchange flow path, and the electric drive flow path are connected, and the first coolant circuit flows through the first heat exchange flow path; when the switching valve is in the second state, the first heat exchange flow path can be selectively connected to one of the battery flow path and the electric drive flow path.

[0014] Further, the thermal management system includes a refrigerant circuit and a second heat exchange flow path connected to the switching valve; the refrigerant circuit includes a second heat exchanger and a compressor, and the second heat exchanger is connected to the outlet port of the compressor; the second heat exchange flow path passes through the second heat exchanger;

[0015] When the switching valve is in the first state, the battery flow path, the second heat exchange flow path, and the electric drive flow path are connected, and the second coolant circuit flows through the second heat exchange flow path; when the switching valve is in the second state, the second heat exchange flow path can be selectively connected to one of the battery flow path and the electric drive flow path.

[0016] Further, the second heat exchange flow path further includes a first coolant branch connected in parallel with the second heat exchanger; the first coolant branch includes a check valve;

[0017] When the switching valve is in the first state, the battery flow path, the electric drive flow path, and one of the check valve and the second heat exchanger are connected; the second coolant circuit flows through the check valve or the second heat exchanger.

[0018] Further, the second heat exchange flow path further includes a warm air liquid pump, the first coolant branch is connected in parallel with the warm air liquid pump, the inlet of the warm air liquid pump is connected between the first coolant branch and the switching valve, and the outlet of the warm air liquid pump is connected to the inlet of the second heat exchanger; the warm air liquid pump is used to enable the coolant to flow through the second heat exchanger.

[0019] Further, the second heat exchange flow path further includes a three-way valve and a second coolant branch connected in parallel to the second heat exchanger; the second coolant branch includes a heater core; an inlet of the three-way valve is connected to an outlet of the second heat exchanger, a first outlet of the three-way valve is connected to the switching valve, and a second outlet of the three-way valve is connected to the second coolant branch; the inlet of the three-way valve is in communication with at least one of the first outlet and the second outlet of the three-way valve.

[0020] Further, the second heat exchange flow path further includes a heater, and the heater is connected to an outlet of the second heat exchanger, and the heater is used to heat the coolant in the second heat exchange flow path.

[0021] The present application provides a vehicle, which includes the thermal management system described in any of the above embodiments.

[0022] The thermal management system provided by the present application includes a battery flow path, an electric drive flow path, an expansion water tank, and a switching valve. The battery flow path includes a battery liquid pump. The electric drive flow path includes an electric drive liquid pump. When the switching valve is in the first state, the battery flow path and the electric drive flow path are in communication to form a first coolant circuit flowing through the battery flow path and the expansion water tank, and a second coolant circuit flowing through the electric drive flow path and the expansion water tank. The coolant in the first coolant circuit and the second coolant circuit can be exhausted through the expansion water tank separately, so that the expansion water tank can exhaust air for the battery flow path alone or for the electric drive flow path alone. In this way, the filling speed of the coolant can be greatly increased, and the exhaust time of the coolant can be shortened. When the switching valve is in the second state, the battery flow path and the electric drive flow path are separated, and the expansion water tank is used to supply water to the battery liquid pump and the electric drive liquid pump through a first liquid filling port and a second liquid filling port respectively. A circuit cannot be formed in the expansion water tank, so that the coolant flowing through the battery and the coolant flowing through the electric drive assembly do not generate heat exchange at the expansion water tank, reducing the heat leakage generated by the heat exchange between the battery flow path and the electric drive flow path, thereby greatly reducing the heat leakage.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Description of the Drawings

[0024] The drawings here are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0025] Figure 1 The figure shows a schematic diagram of the switching valve of the thermal management system according to an embodiment of the present application in the first state;

[0026] Figure 2 As shownFigure 1 Another schematic diagram of the switching valve of the heat management system shown in the first state;

[0027] Figure 3 As shown in Figure 1 Schematic diagram of the switching valve of the heat management system shown in the second state;

[0028] Figure 4 As shown in Figure 1 Another schematic diagram of the switching valve of the heat management system shown in the second state. Detailed implementation mode

[0029] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present 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.

[0030] 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. Unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second" and similar terms used in the specification and claims of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the similar terms such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. "Multiple" or "several" means 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 one position or a spatial orientation. The terms such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0031] 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 of "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. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] The present application provides a thermal management system and a vehicle. The thermal management system and the vehicle of the present application will be described in detail below with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0033] See Figures 1 to 4 As shown, the thermal management system 10 can be used for a vehicle, such as a new energy vehicle. The thermal management system 10 includes a battery flow path 11, an electric drive flow path 12, an expansion water tank 13, and a switching valve 14. The coolant can flow in the battery flow path 11 and the electric drive flow path 12. Among them, the coolant can be cooling water.

[0034] The battery flow path 11 includes a battery liquid pump 15. The battery flow path 11 can include a battery 17. The liquid inlet of the battery liquid pump 15 can be connected to the switching valve 14, and the liquid outlet of the battery liquid pump 15 can be connected to the battery 17, and can supply the coolant to the battery 17. The battery liquid pump 15 can accelerate the circulation speed of the coolant.

[0035] The electric drive flow path 12 includes an electric drive liquid pump 16. The electric drive liquid pump 16 can include an electric drive assembly 18. The electric drive assembly 18 can include one or more of a motor, an on-vehicle charger, a converter, and an autonomous driving controller, which is not limited in the present application. The liquid inlet of the electric drive liquid pump 16 can be connected to the switching valve 14, and the liquid outlet of the electric drive liquid pump 16 can be connected to the electric drive assembly 18, and can supply the coolant to the electric drive assembly 18. The electric drive liquid pump 16 can accelerate the circulation speed of the coolant.

[0036] The expansion water tank 13 includes a first liquid filling port 19 and a second liquid filling port 20 that are communicated. The first liquid filling port 19 is connected to the liquid inlet of the battery liquid pump 15. The first liquid filling port 19 can be connected between the liquid inlet of the battery liquid pump 15 and the switching valve 14. The second liquid filling port 20 is connected to the liquid inlet of the electric drive liquid pump 16. The second liquid filling port 20 can be connected between the liquid inlet of the electric drive liquid pump 16 and the switching valve 14. In this way, the expansion water tank 13 can supply liquid to the battery liquid pump 15 through the first liquid filling port 19, and can supply liquid to the electric drive liquid pump 16 through the second liquid filling port 20. And when the battery flow path 11 and the electric drive flow path 12 are communicated, the coolant can pass through the first liquid filling port 19 and the second liquid filling port 20 of the expansion water tank 13 and pass through the expansion water tank 13, so that the exhaust of the coolant can be realized.

[0037] The battery flow path 11 and the electric drive flow path 12 are connected to the switching valve 14. The switching valve 14 can be a multi-way valve. In this embodiment, the switching valve 14 is a nine-way valve. The switching valve 14 includes a first state and a second state. See Figure 1 and Figure 2As shown, when the switching valve 14 is in the first state, the battery flow path 11 and the electric drive flow path 12 are connected to form a first coolant circuit 21 flowing through the battery flow path 11 and the expansion water tank 13, and a second coolant circuit 22 flowing through the electric drive flow path 12 and the expansion water tank 13. The connection between the battery flow path 11 and the electric drive flow path 12 does not mean that the coolant circulates between the battery flow path 11 and the electric drive flow path 12. Among them, the battery liquid pump 15 is used to realize the circulation of the coolant in the first coolant circuit 21. It is possible to only turn on the battery liquid pump 15 to realize the circulation of the coolant in the first coolant circuit 21. The electric drive liquid pump 16 is used to realize the circulation of the coolant in the second coolant circuit 22. It is possible to only turn on the electric drive liquid pump 16 to realize the circulation of the coolant in the second coolant circuit 22. The flow direction of the coolant circulating in the first coolant circuit 21 is as Figure 1 shown. In the first coolant circuit 21, the coolant can flow through the battery flow path 11 and the expansion water tank 13. The gas in the battery 17 can be transported to the expansion water tank 13 along with the coolant, so that the gas in the coolant can be discharged. The flow direction of the coolant circulating in the second coolant circuit 22 is as Figure 2 shown. In the second coolant circuit 22, the coolant can flow through the electric drive flow path 12 and the expansion water tank 13. The gas in the electric drive assembly 18 can be transported to the expansion water tank 13 along with the coolant, so that the gas in the coolant can be discharged. When the switching valve 14 is in the first state, by controlling the battery liquid pump 15 and the electric drive liquid pump 16, the coolant circuit can be divided into a first coolant circuit 21 and a second coolant circuit 22, so that the coolant can circulate separately in the first coolant circuit 21 or in the second coolant circuit 22. The coolant in the first coolant circuit 21 and the second coolant circuit 22 can separately pass through the expansion water tank 13 for exhaust, so as to realize that the expansion water tank 13 exhausts the battery flow path 11 alone or the electric drive flow path 12 alone. In this way, the filling speed of the coolant can be greatly improved and the exhaust time of the coolant can be shortened. And when local waterway components are replaced, the flow path of the replaced components can be filled and exhausted. For example, when replacing the battery 17, only the gas in the coolant of the battery flow path 11 needs to be discharged. In this way, only the battery liquid pump 15 needs to be turned on to make the coolant circulate in the first coolant circuit 21. It greatly saves the coolant filling and exhaust time for local replacement of waterway components.

[0038] See Figure 3 and Figure 4As shown, when the switching valve 14 is in the second state, the battery flow path 11 and the electric drive flow path 12 are separated, and the expansion water tank 13 is used to supply water to the battery liquid pump 15 and the electric drive liquid pump 16 respectively through the first liquid replenishing port 19 and the second liquid replenishing port 20. The expansion water tank 13 is used to supply water to the battery liquid pump 15 through the first liquid replenishing port 19 and to supply water to the electric drive liquid pump 16 through the second liquid replenishing port 20. When the switching valve 14 is in the second state, the battery flow path 11 is only connected to the first liquid replenishing port 19 of the expansion water tank 13, and the electric drive flow path 12 is only connected to the second liquid replenishing port 20 of the expansion water tank 13. A loop cannot be formed in the expansion water tank 13, so that the coolant flowing through the battery 17 and the coolant flowing through the electric drive assembly 18 do not generate heat exchange at the expansion water tank 13, reducing the heat leakage generated by the heat exchange between the battery flow path 11 and the electric drive flow path 12, thereby greatly reducing the heat leakage amount and reducing the system energy consumption.

[0039] In one embodiment, the thermal management system 10 further includes a heat dissipation flow path 23 connected to the switching valve 14, and the heat dissipation flow path 23 includes a radiator 24. The radiator 24 can be an air-cooled radiator, so that the coolant in the heat dissipation flow path 23 can exchange heat with air at the radiator 24 to achieve the cooling of the coolant. One port of the radiator 24 is connected to the switching valve 14, and the other port of the radiator 24 is connected between the switching valve 14 and the inlet of the electric drive liquid pump 16. Refer to Figure 1 As shown, when the switching valve 14 is in the first state, the battery flow path 11, the heat dissipation flow path 23 and the electric drive flow path 12 are connected, and the first coolant loop 21 flows through the heat dissipation flow path 23. The battery flow path 11, the heat dissipation flow path 23 and the expansion water tank 13 form a first coolant loop 21, and the coolant can flow through the battery 17, the radiator 24 and the expansion water tank 13. The gases in the battery 17 and the radiator 24 are transported to the expansion water tank 13 along with the coolant, so that it can be used for the coolant filling and exhaust when replacing the battery 17 and the radiator 24. Refer to Figure 3 and Figure 4 As shown, when the switching valve 14 is in the second state, the heat dissipation flow path 23 is connected to the electric drive flow path 12. In this way, the radiator 24 is turned on so that the radiator 24 can cool the electric drive assembly 18.

[0040] In one embodiment, the expansion water tank 13 further includes an exhaust port 25, and the radiator 24 is connected to the exhaust port 25. The exhaust port 25 is used to discharge the gas in the radiator 24. The gas stored in the water chamber of the radiator 24 during the operation of the thermal management system 10 can be discharged, which is beneficial to the normal operation of the thermal management system 10.

[0041] In one embodiment, the thermal management system 10 further includes a refrigerant circuit (not shown) and a first heat exchange flow path 26 connected to the switching valve 14. Refrigerant can flow in the refrigerant circuit. The refrigerant circuit includes a first heat exchanger 27 and a compressor, and the compressor can be an electric compressor. The first heat exchanger 27 is connected to the intake port of the compressor. The first heat exchange flow path 26 passes through the first heat exchanger 27. The first heat exchanger 27 can be used to achieve heat exchange between the refrigerant in the refrigerant circuit and the coolant in the first heat exchange flow path 26, so as to increase the temperature of the coolant in the first heat exchange flow path 26. Refer to Figure 1 As shown, when the switching valve 14 is in the first state, the battery flow path 11, the first heat exchange flow path 26 and the electric drive flow path 12 are connected, and the first coolant circuit 21 flows through the first heat exchange flow path 26. A first coolant circuit 21 is formed among the battery flow path 11, the first heat exchange flow path 26 and the expansion water tank 13. The coolant can flow through the battery 17, the first heat exchanger 27 and the expansion water tank 13. The gas in the battery 17 and the first heat exchanger 27 is transmitted to the expansion water tank 13 along with the coolant, so as to be used for refueling and exhausting the coolant when replacing the battery 17 and the first heat exchanger 27. Refer to Figure 3 and Figure 4 As shown, when the switching valve 14 is in the second state, the first heat exchange flow path 26 is selectively connected to one of the battery flow path 11 and the electric drive flow path 12. In Figure 3 the embodiment shown, the first heat exchange flow path 26 is connected to the battery flow path 11, and the first heat exchanger 27 can reduce the coolant temperature of the battery flow path 11, and the first heat exchanger 27 can be used to cool the battery 17. In Figure 4 the embodiment shown, the first heat exchange flow path 26 is connected to the electric drive flow path 12 and the heat dissipation flow path 23, and the first heat exchanger 27 can absorb heat from the external environment through the radiator 24.

[0042] In one embodiment, the thermal management system 10 includes a second heat exchange flow path 28 connected to the switching valve 14. The refrigerant circuit includes a second heat exchanger 29, and the second heat exchanger 29 is connected to the outlet of the compressor. In one embodiment, the refrigerant circuit may include an outdoor heat exchanger, an indoor heat exchanger, a first throttling device, and a second throttling device, and both the first throttling device and the second throttling device may be electronic expansion valves. The outlet of the first heat exchanger 27 and the outlet of the indoor heat exchanger are connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the second heat exchanger 29, the outlet of the second heat exchanger 29 is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to one end of the first throttling device and one end of the second throttling device, the other end of the first throttling device is connected to the inlet of the indoor heat exchanger, and the other end of the second throttling device is connected to the inlet of the first heat exchanger 27. The second heat exchange flow path 28 passes through the second heat exchanger 29. The second heat exchanger 29 can be used to realize the heat exchange between the refrigerant in the refrigerant circuit and the coolant in the second heat exchange flow path 28, so as to increase the temperature of the coolant in the second heat exchange flow path 28. Refer to Figure 2 As shown, when the switching valve 14 is in the first state, the battery flow path 11, the second heat exchange flow path 28, and the electric drive flow path 12 are connected, and the second coolant circuit 22 flows through the second heat exchange flow path 28. A second coolant circuit 22 is formed by the electric drive flow path 12, the second heat exchange flow path 28, and the expansion water tank 13. The coolant can flow through the electric drive assembly 18, the second heat exchanger 29, and the expansion water tank 13. The gas in the electric drive assembly 18 and the second heat exchanger 29 is transferred to the expansion water tank 13 along with the coolant, so as to be used for filling and exhausting the coolant when replacing the electric drive assembly 18 and the second heat exchanger 29. Refer to Figure 3 And Figure 4 As shown, when the switching valve 14 is in the second state, the second heat exchange flow path 28 is selectively connected to one of the battery flow path 11 and the electric drive flow path 12. In Figure 3 the embodiment shown, the second heat exchange flow path 28 is connected to the electric drive flow path 12. Wherein, the radiator 24 can be used to cool the coolant in the second heat exchange flow path 28. In this way, the radiator 24 can be used to cool the coolant passing through the second heat exchanger 29, improving the heat exchange efficiency of the second heat exchanger 29. In Figure 4 the embodiment shown, the second heat exchange flow path 28 is connected to the battery flow path 11. In this way, the battery 17 can be heated through the second heat exchange flow path 28, which is beneficial to the rapid temperature rise of the battery 17.

[0043] In one embodiment, the second heat exchange flow path 28 further includes a first coolant branch 30 connected in parallel to the second heat exchanger 29. The first coolant branch 30 includes a check valve 31. The first end of the check valve 31 is connected to the liquid inlet of the second heat exchanger 29, the second end of the check valve 31 is connected to the liquid outlet of the second heat exchanger 29, and the check valve 31 is unidirectionally conductive from the first end to the second end. This can prevent the coolant from flowing back. Refer to Figure 2 As shown, when the switching valve 14 is in the first state, one of the battery flow path 11, the electric drive flow path 12, the check valve 31 and the second heat exchanger 29 is connected. The battery flow path 11 and the electric drive flow path 12 can be connected to the check valve 31. The battery flow path 11 and the electric drive flow path 12 can also be connected to the second heat exchanger 29. The second coolant circuit 22 flows through the check valve 31 or the second heat exchanger 29. In this way, after the electric drive assembly 18 is replaced, the coolant can enter the expansion water tank 13 without passing through the second heat exchanger 29, thereby accelerating the exhaust speed of the coolant.

[0044] In one embodiment, the second heat exchange flow path 28 further includes a warm air liquid pump 32. The first coolant branch 30 is connected in parallel to the warm air liquid pump 32. The liquid inlet of the warm air liquid pump 32 is connected between the first coolant branch 30 and the switching valve 14, and the liquid outlet of the warm air liquid pump 32 is connected to the liquid inlet of the second heat exchanger 29. The warm air liquid pump 32 is used to enable the coolant to flow through the second heat exchanger 29. The warm air liquid pump 32 can accelerate the flow of the coolant through the second heat exchanger 29.

[0045] In one embodiment, the second heat exchange flow path 28 further includes a three-way valve 33 and a second coolant branch 34 connected in parallel to the second heat exchanger 29. The second coolant branch 34 includes a warm air core 35. The inlet of the three-way valve 33 is connected to the outlet of the second heat exchanger 29. The first outlet of the three-way valve 33 is connected to the switching valve 14, and the second outlet of the three-way valve 33 is connected to the second coolant branch 34. The inlet of the three-way valve 33 is connected to at least one of the first outlet and the second outlet of the three-way valve 33. When the inlet of the three-way valve 33 is connected to the first outlet of the three-way valve 33, the coolant directly enters other flow paths through the switching valve 14 after passing through the second heat exchanger 29. When the inlet of the three-way valve 33 is connected to the second outlet of the three-way valve 33, the coolant can pass through the warm air core 35 after passing through the second heat exchanger 29. In this way, when the indoor temperature is relatively low, the coolant can flow through the warm air core 35 to assist in heating the air inside the vehicle. When the indoor temperature is appropriate, it does not flow through the warm air core 35. In this way, the adaptability of the thermal management system 10 is better. When the switching valve 14 is in the first state, the inlet of the three-way valve 33 can be connected to both the first outlet and the second outlet of the three-way valve 33. In this way, the gas in the warm air core 35 and the second heat exchanger 29 can be transported to the expansion water tank 13 along with the coolant, which is beneficial to the discharge of the gas.

[0046] In one embodiment, the second heat exchange flow path 28 further includes a heater 36. The heater 36 can be a high-pressure heater. The heater 36 can be connected in series with the second heat exchanger 29, and the heater 36 can be connected in parallel with the check valve 31. The heater 36 is connected to the liquid outlet of the second heat exchanger 29, and the heater 36 is used to heat the coolant in the second heat exchange flow path 28. The heater 36 can heat the components such as the heater core 35 and the battery 17 by heating the coolant in the second heat exchange flow path 28, thereby increasing the heating rate of the thermal management system 10.

[0047] See Figure 1 and Figure 2 As shown, in this embodiment, when the switching valve 14 is in the first state, the battery flow path 11, the electric drive flow path 12, the heat dissipation flow path 23, the first heat exchange flow path 26, and the second heat exchange flow path 28 are connected in series and communicated.

[0048] In Figure 1 In the embodiment shown, the battery flow path 11, the first heat exchange flow path 26, the heat dissipation flow path 23, and the expansion water tank 13 are connected in series to form a first coolant circuit 21. Only the battery liquid pump 15 is turned on so that the coolant can circulate in the first coolant circuit 21 and can flow through the battery 17, the first heat exchanger 27, the radiator 24, and the expansion water tank 13 in sequence, thereby discharging the gas in the battery 17, the first heat exchanger 27, and the radiator 24 through the expansion water tank 13. It can be used for filling and exhausting the coolant when replacing the components of the battery 17, the first heat exchanger 27, and the radiator 24.

[0049] In Figure 2 In the embodiment shown, the electric drive flow path 12, the second heat exchange flow path 28, and the expansion water tank 13 are connected in series to form a second coolant circuit 22. The first outlet and the second outlet of the three-way valve 33 are both opened at a 50% opening degree, and the electric drive liquid pump 16 and the heater core liquid pump 32 are turned on so that the coolant can circulate in the second coolant circuit 22 and can flow through the electric drive assembly 18, the second heat exchanger 29, the heater 36, the heater core 35, and the expansion water tank 13 in sequence, thereby discharging the gas in the electric drive assembly 18, the second heat exchanger 29, the heater 36, and the heater core 35 through the expansion water tank 13. It can be used for filling and exhausting the coolant when replacing the components of the electric drive assembly 18, the second heat exchanger 29, the heater 36, and the heater core 35.

[0050] See Figure 3 and Figure 4As shown, in this embodiment, when the switching valve 14 is in the second state, the battery flow path 11 and the electric drive flow path 12 are separated. Specifically, the second state may at least include a first sub-state and a second sub-state. When the battery flow path 11 and the electric drive flow path 12 are separated, the coolant in the battery flow path 11 cannot circulate in the expansion water tank 13, and the coolant in the electric drive flow path 12 cannot circulate in the expansion water tank 13. In this way, the coolant flowing through the battery 17 and the coolant flowing through the electric drive assembly 18 will not generate heat exchange at the expansion water tank 13, reducing heat leakage.

[0051] In Figure 3 the embodiment shown, when the switching valve 14 is in the first sub-state, the battery flow path 11 and the first heat exchange flow path 26 are connected in series. The electric drive flow path 12, the heat dissipation flow path 23, and the second heat exchange flow path 28 are connected in series. In this way, the battery 17 can be cooled by the first heat exchanger 27, and the electric drive assembly 18 and the second heat exchanger 29 can be cooled by the radiator 24.

[0052] In Figure 4 the embodiment shown, when the switching valve 14 is in the second sub-state, the battery flow path 11 and the second heat exchange flow path 28 are connected in series. The electric drive flow path 12, the heat dissipation flow path 23, and the first heat exchange flow path 26 are connected in series. In this way, the battery 17 can be heated by the second heat exchanger 29, and the first heat exchanger 27 can absorb the heat of the external environment through the radiator 24.

[0053] The present application provides a vehicle, and the vehicle includes a thermal management system. It should be noted that the descriptions of the thermal management system in the above embodiments and implementation manners are equally applicable to the vehicle of the embodiments of the present application.

[0054] Those skilled in the art will readily think of other implementation manners of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0055] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A thermal management system, characterized in that, Comprising: A battery flow path, including a battery liquid pump; An electric drive flow path, including an electric drive liquid pump; An expansion water tank, including a first liquid replenishment port and a second liquid replenishment port that are connected. The first liquid replenishment port is connected to the liquid inlet of the battery liquid pump, and the second liquid replenishment port is connected to the liquid inlet of the electric drive liquid pump; And A switching valve. The battery flow path and the electric drive flow path are connected to the switching valve. The switching valve includes a first state and a second state. When the switching valve is in the first state, the battery flow path and the electric drive flow path are communicated to form a first coolant circuit flowing through the battery flow path and the expansion water tank, and a second coolant circuit flowing through the electric drive flow path and the expansion water tank. The battery liquid pump is used to circulate the coolant in the first coolant circuit. The electric drive liquid pump is used to circulate the coolant in the second coolant circuit. When the switching valve is in the second state, the battery flow path and the electric drive flow path are separated, and the expansion water tank is used to supply water to the battery liquid pump and the electric drive liquid pump respectively through the first liquid replenishment port and the second liquid replenishment port.

2. The thermal management system according to claim 1, wherein, The thermal management system further includes a heat dissipation flow path connected to the switching valve. The heat dissipation flow path includes a radiator. One port of the radiator is connected to the switching valve, and the other port of the radiator is connected between the switching valve and the liquid inlet of the electric drive liquid pump; When the switching valve is in the first state, the battery flow path, the heat dissipation flow path and the electric drive flow path are communicated, and the first coolant circuit flows through the heat dissipation flow path. When the switching valve is in the second state, the heat dissipation flow path is communicated with the electric drive flow path.

3. The thermal management system according to claim 2, wherein The expansion water tank further includes an exhaust port. The radiator is connected to the exhaust port, and the exhaust port is used to discharge the gas in the radiator.

4. The thermal management system according to claim 1, wherein The thermal management system further includes a refrigerant circuit and a first heat exchange flow path connected to the switching valve. The refrigerant circuit includes a first heat exchanger and a compressor. The first heat exchanger is connected to the intake port of the compressor. The first heat exchange flow path passes through the first heat exchanger; When the switching valve is in the first state, the battery flow path, the first heat exchange flow path and the electric drive flow path are communicated, and the first coolant circuit flows through the first heat exchange flow path. When the switching valve is in the second state, the first heat exchange flow path can be selectively communicated with one of the battery flow path and the electric drive flow path.

5. The thermal management system according to claim 1, wherein The thermal management system includes a refrigerant circuit and a second heat exchange flow path connected to the switching valve. The refrigerant circuit includes a second heat exchanger and a compressor. The second heat exchanger is connected to the outlet port of the compressor; The second heat exchange flow path passes through the second heat exchanger; When the switching valve is in the first state, the battery flow path, the second heat exchange flow path and the electric drive flow path are communicated, and the second coolant circuit flows through the second heat exchange flow path. When the switching valve is in the second state, the second heat exchange flow path can be selectively communicated with one of the battery flow path and the electric drive flow path.

6. The thermal management system according to claim 5, characterized in that, The second heat exchange flow path further includes a first coolant branch connected in parallel to the second heat exchanger; the first coolant branch includes a check valve. When the switching valve is in the first state, the battery flow path, the electric drive flow path, and one of the check valve and the second heat exchanger are connected; the second coolant circuit flows through the check valve or the second heat exchanger.

7. The thermal management system according to claim 6, characterized in that, The second heat exchange flow path further includes a warm air liquid pump, the first coolant branch is connected in parallel to the warm air liquid pump, the inlet of the warm air liquid pump is connected between the first coolant branch and the switching valve, and the outlet of the warm air liquid pump is connected to the inlet of the second heat exchanger; the warm air liquid pump is used to enable the coolant to flow through the second heat exchanger.

8. The thermal management system according to claim 5, characterized in that, The second heat exchange flow path further includes a three-way valve and a second coolant branch connected in parallel to the second heat exchanger; the second coolant branch includes a heater core; the inlet of the three-way valve is connected to the outlet of the second heat exchanger, the first outlet of the three-way valve is connected to the switching valve, and the second outlet of the three-way valve is connected to the second coolant branch; the inlet of the three-way valve is in communication with at least one of the first outlet and the second outlet of the three-way valve.

9. The thermal management system according to claim 5, wherein, The second heat exchange flow path further includes a heater, the heater is connected to the outlet of the second heat exchanger, and the heater is used to heat the coolant in the second heat exchange flow path.

10. A vehicle, characterized in that, It includes the thermal management system according to any one of claims 1-9.

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