Auxiliary water tank, vehicle thermal management system and vehicle

Abstract

The invention belongs to the technical field of vehicle heat management, and relates to an auxiliary water tank, a vehicle heat management system and a vehicle. The auxiliary water tank comprises a tank body and a tank cover, and the tank body is provided with a first cavity, a second cavity and a liquid injection cavity which are separated from one another. The liquid injection cavity is provided with a first injection hole used for being communicated with the first cavity and a second injection hole used for being communicated with the second cavity. The box cover is detachably inserted into the liquid injection cavity and blocks the first injection hole and the second injection hole, so that the liquid injection cavity is separated from the first cavity body and the second cavity body; when the box cover is detached from the liquid injection cavity, the liquid injection cavity is communicated with the first cavity through the first injection hole, and the liquid injection cavity is communicated with the second cavity through the second injection hole. The auxiliary water tank can achieve the purpose of improving the filling efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle thermal management, and in particular relates to an auxiliary water tank, a vehicle thermal management system and a vehicle. Background Art

[0002] In the prior art, a vehicle auxiliary water tank generally includes two circulation loops. When filling, the filling of the first circulation loop usually needs to be completed before the filling of the second circulation loop can be carried out, resulting in low filling efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to address the technical problem of low filling efficiency of the existing auxiliary water tank, and to provide an auxiliary water tank, a vehicle thermal management system and a vehicle.

[0004] To solve the above technical problems, on the one hand, an embodiment of the present invention provides a secondary water tank, comprising a tank body and a tank cover, wherein the tank body is provided with a first cavity, a second cavity, and a liquid filling cavity separated from each other; the liquid filling cavity is provided with a first filling hole for communicating with the first cavity and a second filling hole for communicating with the second cavity;

[0005] The box cover is detachably inserted into the liquid filling cavity and blocks the first filling hole and the second filling hole to separate the liquid filling cavity from the first cavity and the second cavity;

[0006] When the box cover is detached from the liquid injection cavity, the liquid injection cavity is communicated with the first cavity through the first filling hole, and the liquid injection cavity is communicated with the second cavity through the second filling hole.

[0007] According to an embodiment of the present invention, the auxiliary water tank is provided with a first cavity, a second cavity, and a liquid filling cavity, which are separated from each other. The liquid filling cavity is provided with a first filling hole for communicating with the first cavity and a second filling hole for communicating with the second cavity. During filling, the tank cover is first removed from the liquid filling cavity, and liquid is then poured into the liquid filling cavity using a filling machine. At this time, because the liquid filling cavity is connected to both the first cavity and the second cavity, the coolant added to the liquid filling cavity can enter the first cavity and the second cavity simultaneously, thereby achieving the purpose of improving filling efficiency.

[0008] Optionally, a conducting valve is further provided on the box body; the conducting valve is located between the first cavity and the second cavity, and the conducting valve can connect the first cavity and the second cavity when it is opened.

[0009] Optionally, the box includes a shell and a partition structure, wherein the partition structure is disposed in the shell and is used to separate the inner cavity of the shell into the first cavity and the second cavity;

[0010] The partition structure is provided with the liquid injection cavity, the first filling hole and the second filling hole.

[0011] Optionally, the partition structure includes a partition frame, which is disposed in the shell and is used to separate the inner cavity of the shell into the first cavity and the second cavity;

[0012] The partition frame is provided with the liquid injection cavity, the first filling hole and the second filling hole.

[0013] Optionally, the partition frame includes a first partition, a second partition, and a liquid injection cylinder, the first partition and the second partition are arranged in the box body with spacing, the liquid injection cylinder is arranged between the first partition and the second partition, and the liquid injection cylinder is provided with the liquid injection cavity, the first filling hole, and the second filling hole;

[0014] The first cavity is formed between the side of the first partition facing away from the second partition and the shell, and the second cavity is formed between the side of the second partition facing away from the first partition and the shell.

[0015] Optionally, the partition frame is further provided with a notch; the partition structure further comprises a conduction valve, the conduction valve is provided at the notch, and the conduction valve has an open state and a closed state;

[0016] When the conduction valve is in an open state, the first cavity and the second cavity can be communicated through the gap;

[0017] When the conducting valve is in a closed state, the first cavity and the second cavity are disconnected at the notch by the conducting valve.

[0018] Optionally, the conduction valve includes a valve and a drive assembly, wherein the valve is arranged at the notch, and the drive assembly is mounted on the housing and connected to the valve; the drive assembly is used to drive the valve to move so that the conduction valve switches back and forth between the open state and the closed state;

[0019] When the conducting valve is in an open state, the valve is opened to release the blockage of the gap, so that the first cavity and the second cavity can be communicated through the gap;

[0020] When the conducting valve is in a closed state, the valve is closed to block the gap, so that the first cavity and the second cavity are disconnected at the gap by the valve.

[0021] Optionally, the liquid injection cavity is further provided with a first pressure relief hole communicating with the first cavity and a second pressure relief hole communicating with the second cavity;

[0022] The box cover includes a cover body and a pressure relief assembly. The cover body is detachably inserted into the liquid injection cavity. The cover body is provided with a pressure relief cavity and an air hole, a third pressure relief hole, and a fourth pressure relief hole communicating with the pressure relief cavity. The air hole is used to communicate with the outside air. When the cover body is inserted into the liquid injection cavity, the cover body can block the first filling hole and the second filling hole, and communicate the first pressure relief hole with the third pressure relief hole, and the second pressure relief hole with the fourth pressure relief hole.

[0023] The pressure relief component is installed in the pressure relief chamber, and the pressure relief component has a pressure relief state and a blocking state;

[0024] When the pressure relief assembly is in a pressure relief state, the air hole is connected to the third pressure relief hole and the fourth pressure relief hole;

[0025] When the pressure relief assembly is in a blocked state, the air hole disconnects the third pressure relief hole and the fourth pressure relief hole.

[0026] Optionally, the pressure relief assembly includes a seal, a first pressure relief valve, a first elastic member, a second pressure relief valve, and a second elastic member, wherein the seal is installed in the pressure relief chamber and divides the pressure relief chamber into a first sub-chamber and a second sub-chamber, and the seal is provided with a first vent hole, which is connected between the first sub-chamber and the second sub-chamber;

[0027] The air hole is in communication with the first sub-chamber, and the third pressure relief hole and the fourth pressure relief hole are in communication with the second sub-chamber respectively;

[0028] The first pressure relief valve and the first elastic member are respectively installed in the first sub-chamber, and the first elastic member is elastically supported between the surface of the first pressure relief valve facing away from the sealing member and the cover body; the first pressure relief valve is provided with a second vent hole, and the second vent hole is connected to the first vent hole and the first sub-chamber;

[0029] The second pressure relief valve and the second elastic member are respectively installed in the second sub-chamber, and the second elastic member is elastically supported between a side surface of the second pressure relief valve facing away from the sealing member and the cover body;

[0030] When the pressure relief assembly is in a pressure relief state, the second pressure relief valve moves away from the first pressure relief valve, or the first pressure relief valve moves away from the second pressure relief valve, so that the air hole is connected to the third pressure relief hole and the fourth pressure relief hole through the first sub-chamber, the second vent hole, and the second sub-chamber in sequence;

[0031] When the pressure relief assembly is in a blocked state, the first pressure relief valve and the second pressure relief valve are sealed by the sealing member.

[0032] Optionally, the box body is further provided with a liquid injection port, the liquid injection cavity is communicated with the liquid injection port, and the box cover can be inserted into the liquid injection cavity through the liquid injection port.

[0033] Optionally, the box body is further provided with a first filling port, a first return port, a second filling port, and a second return port, the first filling port and the first return port being respectively connected to the first cavity, and the first filling port and the first return port being used to be connected to a first circulation loop of a vehicle thermal management system;

[0034] The second filling port and the second return port are respectively communicated with the second cavity, and the second filling port and the second return port are used to communicate with a second circulation loop of the vehicle thermal management system.

[0035] On the other hand, an embodiment of the present invention provides a vehicle thermal management system, which includes a first circulation loop, a second circulation loop and the above-mentioned auxiliary water tank, the first circulation loop is connected to the first cavity, and the second circulation loop is connected to the second cavity.

[0036] Optionally, the box body is further provided with a first filling port, a first return port, a second filling port and a second return port, the first filling port and the first return port are respectively connected to the first cavity, and the second filling port and the second return port are respectively connected to the second cavity;

[0037] The first circulation loop is connected between the first filling port and the first return port, and the second circulation loop is connected between the second filling port and the second return port.

[0038] Optionally, the first cavity is a high-temperature cavity, and the second cavity is a low-temperature cavity; the first circulation loop includes an engine system cooling loop, and the second circulation loop includes an electric drive system cooling loop;

[0039] The engine system cooling circuit includes an engine, and a cooling flow channel of the engine is connected between the first filling port and the first return port;

[0040] The electric drive system cooling circuit includes a DC / OBC, an electronic control, and a motor. The cooling channels of the DC / OBC, the electronic control, and the motor are sequentially connected between the second filling port and the second return port.

[0041] Optionally, the engine system cooling circuit further includes a high-temperature radiator and a fan, wherein the inlet of the cooling flow channel of the high-temperature radiator is communicated with the outlet of the cooling flow channel of the engine, and the outlet of the cooling flow channel of the high-temperature radiator is communicated with the inlet of the cooling flow channel of the engine, and the fan is used to blow away the heat emitted by the high-temperature radiator;

[0042] The electric drive system cooling circuit further includes a low-temperature radiator, and a cooling channel of the low-temperature radiator is connected between the second filling port and an inlet of the cooling channel of the DC / OBC.

[0043] Optionally, the second circulation loop further includes a battery cooling loop and a first four-way valve, and the battery cooling loop includes a battery pack;

[0044] The first liquid inlet of the first four-way valve is connected to the second filling port, the first liquid outlet of the first four-way valve is connected to the inlet of the cooling channel of the battery pack, the second liquid inlet of the first four-way valve is connected to the outlet of the cooling channel of the battery pack, and the second liquid outlet of the first four-way valve is connected to the inlet of the cooling channel of the DC / OBC;

[0045] The first liquid inlet of the first four-way valve is connected to the first liquid outlet of the first four-way valve, and the second liquid inlet of the first four-way valve is connected to the second liquid outlet of the first four-way valve; or, the first liquid inlet of the first four-way valve is connected to the second liquid outlet of the first four-way valve, and the second liquid inlet of the first four-way valve is connected to the first liquid outlet of the first four-way valve.

[0046] Optionally, the first cavity is a high-temperature cavity, and the second cavity is a low-temperature cavity; the first circulation loop includes an electric drive system cooling loop, and the second circulation loop includes a battery cooling loop;

[0047] The electric drive system cooling circuit includes a DC / OBC, an electronic control, and a motor, wherein the cooling channel of the DC / OBC, the cooling channel of the electronic control, and the cooling channel of the motor are sequentially connected between the first filling port and the first return port;

[0048] The battery cooling circuit includes a battery pack, and a cooling channel of the battery pack is connected between the second filling port and the second return port.

[0049] Optionally, the electric drive system cooling circuit also includes an electronically controlled radiator, the inlet of the cooling channel of the electronically controlled radiator is connected to the first filling port, and the outlet of the cooling channel of the electronically controlled radiator is connected to the inlet of the cooling channel of the DC / OBC.

[0050] Optionally, the battery cooling circuit further includes a battery radiator, the inlet of the cooling channel of the battery radiator is connected to the second filling port, and the outlet of the cooling channel of the battery radiator is connected to the inlet of the cooling channel of the battery pack.

[0051] Optionally, the vehicle thermal management system further includes an air conditioning system cooling circuit, the air conditioning system cooling circuit including an air conditioning water-cooled heat exchanger, a gas-liquid separator, and a compressor, the air conditioning water-cooled heat exchanger having a refrigerant channel and a cooling flow channel, the cooling flow channel of the air conditioning water-cooled heat exchanger being in communication with the electric drive system cooling circuit;

[0052] The refrigerant channel of the air-conditioning water-cooled heat exchanger is connected between the refrigerant inlet of the gas-liquid separator and the refrigerant outlet of the compressor, and the refrigerant outlet of the gas-liquid separator is connected to the refrigerant inlet of the compressor.

[0053] Optionally, the air-conditioning system cooling circuit further includes an evaporator, the refrigerant inlet of the evaporator is connected to the refrigerant channel of the air-conditioning water-cooled heat exchanger, and the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the gas-liquid separator.

[0054] Optionally, the battery cooling circuit also includes a refrigerator, which has a refrigerant channel and a cooling flow channel. The cooling flow channel of the battery pack is connected to the cooling flow channel of the refrigerator, and the refrigerant channel of the refrigerator is connected between the refrigerant channel of the air-conditioning water-cooled heat exchanger and the refrigerant inlet of the gas-liquid separator.

[0055] Optionally, the air-conditioning system cooling circuit further includes an internal condenser, the refrigerant inlet of the internal condenser is connected to the refrigerant outlet of the compressor, and the refrigerant outlet of the internal condenser is connected to the refrigerant channel of the air-conditioning water-cooled heat exchanger.

[0056] On the other hand, an embodiment of the present invention provides a vehicle, which includes the above-mentioned auxiliary water tank or the above-mentioned vehicle thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 1 is a first cross-sectional schematic diagram of the auxiliary water tank provided in the first embodiment of the present invention;

[0058] Figure 2 is a second cross-sectional schematic diagram of the auxiliary water tank provided in the first embodiment of the present invention;

[0059] Figure 3 is a schematic diagram of the auxiliary water tank provided in the first embodiment of the present invention;

[0060] Figure 4 yes Figure 3 Exploded view of the middle auxiliary water tank;

[0061] Figure 5 yes Figure 4 Enlarged view of the middle box cover;

[0062] Figure 6 Schematic diagram of the principle of a vehicle thermal management system provided by the second embodiment of the present invention;

[0063] Figure 7 yes Figure 6 Schematic diagram of the vehicle thermal management system when the ambient temperature is low and the vehicle is in maximum cooling mode;

[0064] Figure 8 yes Figure 6 Schematic diagram of the vehicle thermal management system when the ambient temperature is high and the vehicle is in maximum cooling mode;

[0065] Figure 9 yes Figure 6 Schematic diagram of the vehicle thermal management system when the vehicle is in maximum heating mode;

[0066] Figure 10 Schematic diagram of the principle of a vehicle thermal management system provided by the third embodiment of the present invention;

[0067] Figure 11 yes Figure 10 Schematic diagram of the vehicle thermal management system when the ambient temperature is low and the vehicle is in maximum cooling mode;

[0068] Figure 12 yes Figure 10 Schematic diagram of the vehicle thermal management system when the ambient temperature is high and the vehicle is in maximum cooling mode;

[0069] Figure 13 yes Figure 10 Schematic diagram of the vehicle thermal management system when the vehicle is in maximum heating mode.

[0070] The reference numerals in the specification are as follows:

[0071] 1. Auxiliary water tank; 101. Tank; 1011. Shell; 1012. Partition frame; 10121. Notch; 10122. Second partition; 10123. Connecting plate; 10124. Liquid injection cylinder; 10125. First partition; 1013. Conducting valve; 10131. Valve; 10132. Drive assembly; 1014. Liquid injection port; 1015. First filling port; 1016. First return port; 1017. Second filling port; 1018. Second return port; 102. Tank cover; 1021. Cover; 10211. Air hole; 10212. Fourth pressure relief hole; 10213. Third pressure relief hole; 1 0213, first sub-chamber; 10214, second sub-chamber; 10215, bottom cover; 10216, top cover; 10217, sealing rubber tube; 1022, pressure relief assembly; 10221, sealing member; 102211, first vent hole; 10222, first pressure relief valve; 10223, first elastic member; 10224, second pressure relief valve; 10225, second elastic member; 103, sealing ring; 1001, first cavity; 1002, second cavity; 1003, liquid injection chamber; 1004, first filling hole; 1005, second filling hole; 1006, first pressure relief hole; 1007, second pressure relief hole;

[0072] 2. Engine; 3. DC / OBC; 4. Electronic control; 5. Motor; 6. High-temperature radiator; 7. Fan; 8. Low-temperature radiator; 9. Engine water pump; 10. Three-way valve; 11. Battery pack; 12. First four-way valve; 13. First water pump; 14. Second water pump; 15. Air conditioning water-cooled heat exchanger; 16. Gas-liquid separator; 17. Compressor; 18. Evaporator; 19. First expansion valve; 20. First temperature and pressure sensor; 21. Refrigerator; 22. Second expansion valve; 23. Second temperature and pressure sensor; 24. First one-way valve; 25. Third temperature and pressure sensor; 26. Pressure sensor; 27. Internal condenser; 28. Second four-way valve; 29. ​​Third expansion valve; 30. Second one-way valve; 31. Electronically controlled radiator; 32. Battery radiator; 33. First three-way valve; 34. Second three-way valve. DETAILED DESCRIPTION

[0073] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0074] Example 1

[0075] like Figures 1 to 5As shown, the auxiliary water tank 1 provided in the first embodiment of the present invention includes a tank body 101 and a tank cover 102. The tank body 101 is provided with a first cavity 1001, a second cavity 1002, and a liquid filling cavity 1003, which are separated from each other. The liquid filling cavity 1003 is used to add coolant. The liquid filling cavity 1003 is provided with a first filling hole 1004 for communicating with the first cavity 1001 and a second filling hole 1005 for communicating with the second cavity 1002.

[0076] The box cover 102 is detachably inserted into the liquid filling cavity 1003 and blocks the first filling hole 1004 and the second filling hole 1005 to separate the liquid filling cavity 1003 from the first cavity 1001 and the second cavity 1002 .

[0077] When the box cover 102 is detached from the liquid injection chamber 1003, the liquid injection chamber 1003 is connected with the first cavity 1001 through the first filling hole 1004, and the liquid injection chamber 1003 is connected with the second cavity 1002 through the second filling hole 1005, so that the coolant added to the liquid injection chamber 1003 can enter the first cavity 1001 and the second cavity 1002 at the same time.

[0078] The auxiliary water tank 1 provided in an embodiment of the present invention has a first cavity 1001, a second cavity 1002, and a liquid injection cavity 1003, which are separated from each other, disposed on the tank body 101. The liquid injection cavity 1003 is provided with a first filling port 1004 for communicating with the first cavity 1001, and a second filling port 1005 for communicating with the second cavity 1002. During refilling, the tank cover 102 is first removed from the liquid injection cavity 1003, and liquid is then injected into the liquid injection cavity 1003 using a filling machine. At this point, because the liquid injection cavity 1003 is in communication with both the first cavity 1001 and the second cavity 1002, the coolant injected into the liquid injection cavity 1003 can simultaneously enter the first cavity 1001 and the second cavity 1002, thereby improving refilling efficiency.

[0079] After filling is complete, the tank cover 102 is inserted into the liquid filling chamber 1003, thereby disconnecting the liquid filling chamber 1003 from the first cavity 1001 and the second cavity 1002, thereby disconnecting the first cavity 1001 from the second cavity 1002. If one of the first cavity 1001 and the second cavity 1002 is a high-temperature cavity and the other is a low-temperature cavity, disconnecting the first cavity 1001 and the second cavity 1002 prevents the coolants of different temperature zones from mixing, thereby preventing the high-temperature coolant from affecting the low-temperature circuit.

[0080] Specifically, when the auxiliary water tank 1 provided in an embodiment of the present invention is used in a vehicle thermal management system, one of the first cavity 1001 and the second cavity 1002 is a high-temperature cavity, and the other is a low-temperature cavity, to serve as circulation loops with different requirements (such as the electric drive system cooling loop, the engine system cooling loop, the battery cooling loop, etc.). In the illustrated embodiment, the first cavity 1001 is a high-temperature cavity, and the second cavity 1002 is a low-temperature cavity. In other embodiments not shown in the figure, the first cavity 1001 can also be a low-temperature cavity, and the second cavity can be a high-temperature cavity.

[0081] In the first embodiment, Figures 1 to 4 As shown, the box body 101 includes a shell 1011 and a partition structure. The partition structure is disposed within the shell 1011 and is used to separate the inner cavity of the shell 1011 into a first cavity 1001 and a second cavity 1002. The partition structure is provided with the liquid injection cavity 1003, the first filling hole 1004, and the second filling hole 1005.

[0082] The inner cavity of the shell 1011 is divided into the first cavity 1001 and the second cavity 1002 by the partition structure, and the liquid injection cavity 1003, the first filling hole 1004 and the second filling hole 1005 are provided on the partition structure to form various cavity structures inside the box body 101, while ensuring the connectivity of the liquid injection cavity 1003 with the first cavity 1001 and the second cavity 1002.

[0083] In the first embodiment, Figures 1 to 4 As shown, the partition structure includes a partition frame 1012 and a conduction valve 1013. The partition frame 1012 is disposed within the housing 1011 and is used to separate the inner cavity of the housing 1011 into the first cavity 1001 and the second cavity 1002. The partition frame 1012 is provided with the liquid injection cavity 1003, the first filling hole 1004, and the second filling hole 1005, so as to form various cavity structures within the box body 101.

[0084] Furthermore, if Figure 1 and Figure 2 As shown, the partition frame 1012 is further provided with a notch 10121. The conduction valve 1013 is provided at the notch 10121, and the conduction valve 1013 has an open state and a closed state.

[0085] When the conduction valve 1013 is in an open state, the first cavity 1001 and the second cavity 1002 can communicate with each other through the notch 10121. When the conduction valve 1013 is in a closed state, the first cavity 1001 and the second cavity 1002 are disconnected at the notch 10121 by the conduction valve 1013.

[0086] By providing the conduction valve 1013 on the auxiliary water tank 1, when waste heat recovery is required, the conduction valve 1013 can be switched to an open state, allowing communication between the first cavity 1001 and the second cavity 1002 through the notch 10121. By mixing the high and low temperature coolants in the first cavity 1001 and the second cavity 1002, the waste heat in the high temperature zone is fully utilized, thereby improving the waste heat recovery efficiency. Compared to the conventional method of transferring heat from the high temperature coolant to the low temperature coolant through a heat exchanger to achieve waste heat recovery, the method of achieving the mixing of high and low temperature coolants through the conduction valve 1013 in the first embodiment of the present invention has a higher waste heat recovery efficiency, and because the use of heat exchangers is reduced, the corresponding cost will also be reduced.

[0087] In other embodiments not shown in the figures, the partition structure may also only include a partition frame without a conducting valve. Correspondingly, in this case, the partition structure can only separate the first cavity from the second cavity, and the first cavity and the second cavity cannot be connected except at the position of the injection cavity. This structure can better avoid the mixing of coolant between the first cavity and the second cavity, but if heat recovery in the high-temperature zone is to be achieved, additional structures such as a heat exchanger need to be added.

[0088] In one embodiment, if Figure 1 and Figure 2 As shown, the partition frame 1012 includes a first partition 10125, a second partition 10122, a connecting plate 10123 and a liquid injection cylinder 10124. The first partition 10125 and the second partition 10122 are spaced apart in the box body 101, and the liquid injection cylinder 10124 is arranged between the first partition 10125 and the second partition 10122. The liquid injection cylinder 10124 is provided with the liquid injection cavity 1003, the first filling hole 1004 and the second filling hole 1005.

[0089] The first cavity 1001 is formed between the side of the first partition 10125 facing away from the second partition 10122 and the shell 1011 , and the second cavity 1002 is formed between the side of the second partition 10122 facing away from the first partition 10125 and the shell 1011 .

[0090] The connecting plate 10123 is connected between the bottom of the first partition plate 10125 and the bottom of the second partition plate 10122 . A notch 10121 is formed between the connecting plate 10123 and the shell 1011 for the installation of the conducting valve 1013 .

[0091] In other embodiments not shown in the figures, if the partition structure only includes a partition frame and no conducting valve is provided, correspondingly, there is no need to provide a notch for installing the conducting valve. In this case, the partition frame can be composed of a first partition plate, a second partition plate and a liquid injection cylinder, and there is no need to provide the above-mentioned connecting plate.

[0092] In one embodiment, if Figure 1 and Figure 2 As shown, a cavity may be formed between the first partition 10125 and the second partition 10122 . At this time, the cavity is located between the first cavity 1001 and the second cavity 1002 . The existence of the cavity reduces heat conduction between the first cavity 1001 and the second cavity 1002 .

[0093] In the first embodiment, Figure 1 、 Figure 2 and Figure 4 As shown, the conduction valve 1013 includes a valve 10131 and a drive assembly 10132. The valve 10131 is disposed at the notch 10121. The drive assembly 10132 is mounted on the housing 1011 and connected to the valve 10131. The drive assembly 10132 is used to drive the valve 10131 to move, so that the conduction valve 1013 switches back and forth between the open state and the closed state.

[0094] When the conducting valve 1013 is in the open state, the valve 10131 is opened to release the blockage of the notch 10121 , so that the first cavity 1001 and the second cavity 1002 can be communicated with each other through the notch 10121 .

[0095] When the conducting valve 1013 is in a closed state, the valve 10131 is closed to block the gap 10121 , so that the first cavity 1001 and the second cavity 1002 are disconnected at the gap 10121 by the valve 10131 .

[0096] In the first embodiment, Figure 1 、 Figure 2 and Figure 4 As shown, a sealing ring 103 is sleeved on the box cover 102. When the box cover 102 is inserted into the liquid injection cavity 1003, the sealing ring 103 is sealed between the box cover 102 and the box body 101 to achieve sealing.

[0097] In the first embodiment, Figure 1 、 Figure 2 and Figure 4 As shown, the liquid injection cavity 1003 is further provided with a first pressure relief hole 1006 communicating with the first cavity 1001 and a second pressure relief hole 1007 communicating with the second cavity 1002 .

[0098] The box cover 102 includes a cover body 1021 and a pressure relief assembly 1022. The cover body 1021 is removably inserted into the liquid injection chamber 1003. The cover body 1021 is provided with a pressure relief chamber and an air hole 10211, a third pressure relief hole 10213, and a fourth pressure relief hole 10212 connected to the pressure relief chamber. The air hole 10211 is used to communicate with the outside air. When the cover body 1021 is inserted into the liquid injection chamber 1003, the cover body 1021 can block the first filling hole 1004 and the second filling hole 1005, and connect the first pressure relief hole 1006 with the third pressure relief hole 10213, and the second pressure relief hole 1007 with the fourth pressure relief hole 10212.

[0099] The pressure relief component 1022 is installed in the pressure relief chamber, and the pressure relief component 1022 has a pressure relief state and a blocking state.

[0100] When the pressure relief assembly 1022 is in the pressure relief state, the air hole 10211 is connected with the third pressure relief hole 10213 and the fourth pressure relief hole 10212, so that the first cavity 1001 can be connected with the external air through the first pressure relief hole 1006, the third pressure relief hole 10213 and the air hole 10211 in sequence, and the second cavity 1002 can be connected with the outside air through the second pressure relief hole 1007, the fourth pressure relief hole 10212 and the air hole 10211 in sequence, thereby allowing the gas in the first cavity 1001 and the second cavity 1002 to be discharged to the outside, or allowing the outside air to enter the first cavity 1001 and the second cavity 1002.

[0101] When the pressure relief assembly 1022 is in a blocked state, the air hole 10211 disconnects the third pressure relief hole 10213 and the fourth pressure relief hole 10212. At this time, the gas in the first cavity 1001 and the second cavity 1002 cannot be connected to the outside world, and the gas in the first cavity 1001 and the second cavity 1002 cannot be discharged to the outside world, or the outside air cannot enter the first cavity 1001 and the second cavity 1002.

[0102] In the first embodiment, Figure 5As shown, the pressure relief assembly 1022 includes a seal 10221, a first pressure relief valve 10222, a first elastic member 10223, a second pressure relief valve 10224 and a second elastic member 10225. The seal 10221 is installed in the pressure relief chamber and divides the pressure relief chamber into a first sub-chamber 10213 and a second sub-chamber 10214. A first air vent 102211 is provided on the seal 10221, and the first air vent 102211 is connected between the first sub-chamber 10213 and the second sub-chamber 10214.

[0103] The air hole 10211 is in communication with the first sub-chamber 10213 , and the third pressure relief hole 10213 and the fourth pressure relief hole 10212 are in communication with the second sub-chamber 10214 , respectively.

[0104] The first pressure relief valve 10222 and the first elastic member 10223 are respectively installed in the first sub-chamber 10213, and the first elastic member 10223 is elastically supported between the side of the first pressure relief valve 10222 facing away from the sealing member 10221 and the cover 1021. The first pressure relief valve 10222 is provided with a second vent hole 102221, which is in communication with the first vent hole 102211 and the first sub-chamber 10213.

[0105] The second pressure relief valve 10224 and the second elastic member 10225 are respectively installed in the second sub-chamber 10214 , and the second elastic member 10225 is elastically supported between the side surface of the second pressure relief valve 10224 facing away from the sealing member 10221 and the cover body 1021 .

[0106] In the natural state (the air pressure in the auxiliary water tank 1 is consistent with the external air pressure), the pressure relief assembly 1022 is in a blocked state, the first pressure relief valve 10222 and the second pressure relief valve 10224 are sealed by the seal 10221, the first sub-chamber 10213 and the second sub-chamber 10214 are isolated, so that the air hole 10211 disconnects the connection between the third pressure relief hole 10213 and the fourth pressure relief hole 10212, thereby preventing the gas in the first cavity 1001 and the second cavity 1002 from being discharged to the outside, or preventing the outside air from entering the first cavity 1001 and the second cavity 1002.

[0107] When negative pressure is formed in the auxiliary water tank 1 (the air pressure in the auxiliary water tank 1 is less than the external air pressure) and reaches a critical value, the pressure relief assembly 1022 is in a pressure relief state, and the second pressure relief valve 10224 moves in a direction away from the first pressure relief valve 10222 under the action of external air pressure, so that the air hole 10211 is connected to the third pressure relief hole 10213 and the fourth pressure relief hole 10212 through the first sub-chamber 10213, the second air hole 102221, the second sub-chamber 10214 in sequence, so that external air can enter the first cavity 1001 and the second cavity 1002.

[0108] When positive pressure is formed in the auxiliary water tank 1 (the air pressure in the auxiliary water tank 1 is greater than the external air pressure) and reaches a critical value, the pressure relief assembly 1022 is in a pressure relief state, and the first pressure relief valve 10222 moves in a direction away from the second pressure relief valve 10224 under the action of internal air pressure, so that the air hole 10211 is connected to the third pressure relief hole 10213 and the fourth pressure relief hole 10212 through the first sub-chamber 10213, the second air hole 102221, the second sub-chamber 10214 in sequence, thereby discharging the gas in the first cavity 1001 and the second cavity 1002 to the outside.

[0109] In the first embodiment, Figure 5 As shown, the cover body 1021 includes a bottom cover 10215 and a top cover 10216. The bottom cover 10215 and the top cover 10216 are detachably connected, and the pressure relief chamber is formed between the bottom cover 10215 and the top cover 10216.

[0110] In the first embodiment, Figure 5 As shown, the cover body 1021 further includes a sealing rubber tube 10217, which is sleeved on the bottom cover 10215. When the box cover 102 is inserted into the liquid injection cavity 1003, the sealing rubber tube 10217 is elastically supported between the bottom cover 10215 and the cavity wall of the liquid injection cavity 1003. At this time, the bottom cover 10215 and the cavity wall of the liquid injection cavity 1003 jointly squeeze the sealing rubber tube 10217, thereby achieving the blockage of the first filling hole 1004 and the second filling hole 1005.

[0111] In Example 1, when assembling the box cover 102, the second elastic member 10225, the second pressure relief valve 10224, the sealing member 10221, the first pressure relief valve 10222 and the first elastic member 10223 can be installed on the bottom cover 10215 in sequence first, and then the top cover 10216 is connected to the bottom cover 10215, and finally the sealing rubber tube 10217 is sleeved on the outside of the bottom cover 10215 to form the box cover 102.

[0112] In the first embodiment, Figure 4 As shown, the box body 101 is further provided with a liquid injection port 1014 , the liquid injection cavity 1003 is communicated with the liquid injection port 1014 , and the box cover 102 can be inserted into the liquid injection cavity 1003 through the liquid injection port 1014 .

[0113] In the first embodiment, Figure 3 and Figure 4 As shown, the box body 101 is also provided with a first filling port 1015, a first return port 1016, a second filling port 1017 and a second return port 1018. The first filling port 1015 and the first return port 1016 are respectively connected to the first cavity 1001, and the first filling port 1015 and the first return port 1016 are used to connect with the first circulation loop of the vehicle thermal management system.

[0114] The second filling port 1017 and the second return port 1018 are respectively communicated with the second cavity 1002 , and the second filling port 1017 and the second return port 1018 are used to communicate with a second circulation loop of the vehicle thermal management system.

[0115] When the auxiliary water tank 1 is used for refilling in a vehicle thermal management system, the tank cover 102 is first removed from the tank body 101, separating the tank cover 101 from the liquid filling chamber 1003. Then, a refilling machine is used to add coolant to the liquid filling chamber 1003. After the liquid filling chamber 1003 is filled with coolant, the coolant in the liquid filling chamber 1003 flows into the first cavity 1001 and the second cavity 1002 through the first filling hole 1004 and the second filling hole 1005. Afterwards, the coolant in the first cavity 1001 will be filled into the first circulation loop through the first filling port 1015, and the coolant in the second cavity 1002 will be filled into the second circulation loop through the second filling port 1017. After the first circulation loop and the second circulation loop are filled, the coolant in the first circulation loop will flow back into the first cavity 1001 through the first reflux port 1016, and the coolant in the second circulation loop will flow back into the second cavity 1002 through the second reflux port 1018.

[0116] When the pressure in the first cavity 1001 and the second cavity 1002 reaches the set value and cannot continue to be injected, the filling machine will stop filling and suck back the excess coolant. Due to the existence of the injection cavity 1003, the filling machine can only suck back the coolant in the injection cavity 1003.

[0117] After the back-sucking is completed, the filling machine is removed and the tank cover 102 is installed on the tank body 101, so that the tank cover 102 is inserted into the liquid injection chamber 1003. The tank cover 102 can block the first filling hole 1004 and the second filling hole 1005, thereby disconnecting the liquid injection chamber 1003 from the first cavity 1001 and the second cavity 1002, and preventing the coolant in the first cavity 1001 and the second cavity 1002 from mixing. When the vehicle is driving up and down hills and accelerating and decelerating, only in extreme cases will a small amount of coolant in the first cavity 1001 and / or the second cavity 1002 splash into the liquid injection chamber 1003, and the mixing of high and low temperature coolants will basically not occur.

[0118] Example 2

[0119] like Figures 6 to 9 As shown, embodiment 2 of the present invention provides a vehicle thermal management system, including a first circulation loop, a second circulation loop and the auxiliary water tank 1 provided in embodiment 1 above, wherein the first circulation loop is connected to the first cavity 1001, and the second circulation loop is connected to the second cavity 1002.

[0120] In the second embodiment, the first cavity 1001 is a high-temperature cavity, and the second cavity 1002 is a low-temperature cavity. The first circulation loop includes an engine system cooling loop, and the second circulation loop includes an electric drive system cooling loop.

[0121] In the second embodiment, Figure 6 As shown, the engine system cooling circuit includes an engine 2 and an engine water pump 9. The cooling channel of the engine 2 and the engine water pump 9 are connected in sequence between the first filling port 1015 and the first return port 1016 to form a circuit between the first cavity 1001, the engine water pump 9 and the engine 2 to achieve cooling of the engine system.

[0122] In the second embodiment, Figure 6 As shown, the engine system cooling circuit also includes a high-temperature radiator 6 and a fan 7. The inlet of the cooling channel of the high-temperature radiator 6 is connected to the outlet of the cooling channel of the engine 2, and the outlet of the cooling channel of the high-temperature radiator 6 is connected to the inlet of the cooling channel of the engine 2. The fan 7 is used to blow away the heat emitted by the high-temperature radiator 6. By providing the high-temperature radiator 6 and fan 7, the engine 2 can be further cooled, improving the cooling effect of the engine system.

[0123] In the second embodiment, Figure 6As shown, the electric drive system cooling circuit includes DC / OBC 3, electronic control 4 and motor 5. The cooling channel of the DC / OBC 3, the cooling channel of the electronic control 4 and the cooling channel of the motor 5 are connected in sequence between the second filling port 1017 and the second return port 1018 to form a cooling circuit for the electric drive component, thereby cooling the various components of the electric drive component.

[0124] It should be noted that, in other embodiments not shown in the figures, the relative positions of the DC / OBC, the electronic control and the motor may not be consistent with those in the illustrated embodiment, and may be specifically configured as needed.

[0125] In the second embodiment, Figure 6 As shown, the electric drive system cooling circuit also includes a low-temperature radiator 8. The cooling channel of the low-temperature radiator 8 is connected between the second filling port 1017 and the inlet of the cooling channel of the DC / OBC 3. The setting of the low-temperature radiator 8 can further cool the electric drive component and improve the cooling effect of the electric drive component.

[0126] In the second embodiment, Figure 6 As shown, the electric drive system cooling circuit also includes a three-way valve 10, the first liquid inlet A of the three-way valve 10 is connected to the outlet of the cooling channel of the low-temperature radiator 8, the second liquid inlet B of the three-way valve 10 is connected to the second filling port 1017, and the liquid outlet C of the three-way valve 10 is connected to the inlet of the cooling channel of the DC / OBC 3, so that the cooling channel of the DC / OBC 3 can be supplied with coolant through two flow paths. The two flow paths are: a flow path that flows out from the second cavity 1002 and supplies the cooling channel of the low-temperature radiator 8 (as shown in FIG. 1 ). Figure 7 and Figure 8 and a flow path supplied directly by the second cavity 1002 (as shown); Figure 9 shown).

[0127] In the second embodiment, Figure 6 As shown, the second circulation loop further includes a battery cooling loop and a first four-way valve 12 , and the battery cooling loop includes a battery pack 11 .

[0128] The first liquid inlet A of the first four-way valve 12 is connected to the second filling port 1017 (or to the outlet of the cooling channel of the low-temperature radiator 8, or to the liquid outlet C of the three-way valve 10), the first liquid outlet B of the first four-way valve 12 is connected to the inlet of the cooling channel of the battery pack 11, the second liquid inlet C of the first four-way valve 12 is connected to the outlet of the cooling channel of the battery pack 11, and the second liquid outlet D of the first four-way valve 12 is connected to the inlet of the cooling channel of the DC / OBC 3.

[0129] When the first four-way valve 12 is in operation, the first liquid inlet A of the first four-way valve 12 is connected to the first liquid outlet B of the first four-way valve 12, and the second liquid inlet C of the first four-way valve 12 is connected to the second liquid outlet D of the first four-way valve 12 (e.g., Figure 6 、 Figure 7 and Figure 9 At this point, the battery cooling circuit will be connected in series with the electric drive system cooling circuit. The coolant will first pass through the cooling channel of the battery pack 11 and then flow into the cooling channels of the DC / OBC 3, electronic control 4, and motor 5, cooling the battery pack 11 and the electric drive components in sequence.

[0130] Alternatively, the first liquid inlet A of the first four-way valve 12 may be connected to the second liquid outlet D of the first four-way valve 12, and the second liquid inlet C of the first four-way valve 12 may be connected to the first liquid outlet B of the first four-way valve 12 (e.g., Figure 8 In this case, the battery cooling circuit will be relatively independent from the electric drive system cooling circuit. The coolant flowing through the cooling channel of the battery pack 11 will not intersect with the coolant flowing through the cooling channel of the DC / OBC 3, electronic control 4, and motor 5. The battery pack 11 and the electric drive components are cooled separately.

[0131] In the second embodiment, Figure 6 As shown, the electric drive system cooling circuit also includes a first water pump 13, which is connected between the second filling port 1017 (or the outlet of the cooling channel of the low-temperature radiator 8, or the liquid outlet C of the three-way valve 10, or the second liquid outlet D of the first four-way valve 12) and the inlet of the cooling channel of the DC / OBC 3. The first water pump 13 is provided to ensure the coolant flow rate of the electric drive system cooling circuit.

[0132] In the second embodiment, Figure 6 As shown, the battery cooling circuit also includes a second water pump 14, which is connected between the second filling port 1017 (or the outlet of the cooling channel of the low-temperature radiator 8, or the liquid outlet C of the three-way valve 10, or the first liquid outlet B of the first four-way valve 12) and the inlet of the cooling channel of the battery pack 11. The second water pump 14 is provided to ensure the coolant flow rate of the battery cooling circuit.

[0133] In the second embodiment, Figure 6As shown, the vehicle thermal management system also includes an air-conditioning system cooling circuit, which includes an air-conditioning water-cooled heat exchanger 15, a gas-liquid separator 16 and a compressor 17. The air-conditioning water-cooled heat exchanger 15 has a refrigerant channel and a cooling flow channel. The cooling flow channel of the air-conditioning water-cooled heat exchanger 15 is connected to the electric drive system cooling circuit.

[0134] The refrigerant channel of the air-conditioning water-cooled heat exchanger 15 is connected between the refrigerant inlet of the gas-liquid separator 16 and the refrigerant outlet of the compressor 17, and the refrigerant outlet of the gas-liquid separator 16 is connected to the refrigerant inlet of the compressor 17 to form the air-conditioning system cooling circuit.

[0135] In the second embodiment, Figure 6 As shown, the air-conditioning system cooling circuit also includes an evaporator 18, the refrigerant inlet of the evaporator 18 is connected to the refrigerant channel of the air-conditioning water-cooled heat exchanger 15, and the refrigerant outlet of the evaporator 18 is connected to the refrigerant inlet of the gas-liquid separator 16, thereby forming a corresponding air-conditioning system cooling circuit to achieve cooling of the air-conditioning system.

[0136] In the second embodiment, Figure 6 As shown, the air conditioning system cooling circuit further includes a first expansion valve 19 and a first temperature and pressure sensor 20. The refrigerant inlet of the first expansion valve 19 is connected to the refrigerant channel of the air conditioning water-cooled heat exchanger 15, and the refrigerant outlet of the first expansion valve 19 is connected to the refrigerant inlet of the evaporator 18. The first temperature and pressure sensor 20 is disposed at the refrigerant outlet of the evaporator 18. The first expansion valve 19 is used to control the refrigerant flow through the evaporator 18, and the first temperature and pressure sensor 20 is used to sense the temperature and pressure of the refrigerant flowing out of the refrigerant outlet of the evaporator 18.

[0137] In the second embodiment, Figure 6 As shown, the battery cooling circuit also includes a refrigerator 21, which has a refrigerant channel and a cooling flow channel. The cooling flow channel of the battery pack 11 is connected to the cooling flow channel of the refrigerator 21. The refrigerant channel of the refrigerator 21 is connected between the refrigerant channel of the air-conditioning water-cooled heat exchanger 15 and the refrigerant inlet of the gas-liquid separator 16. When the refrigerator 21 is working, the heat of the coolant flowing through the refrigerator 21 can be transferred to the refrigerant in the refrigerant channel of the refrigerator 21, thereby reducing the temperature of the coolant in the battery cooling circuit and further cooling the battery pack 11.

[0138] In the second embodiment, Figure 6As shown, the air conditioning system cooling circuit also includes a second expansion valve 22 and a second temperature and pressure sensor 23. The refrigerant inlet of the second expansion valve 22 is connected to the refrigerant channel of the air conditioning water-cooled heat exchanger 15, and the refrigerant outlet of the second expansion valve 22 is connected to the refrigerant inlet of the refrigerator 21. The second temperature and pressure sensor 23 is disposed at the refrigerant outlet of the refrigerator 21. The second expansion valve 22 is used to control the refrigerant flow through the refrigerator 21, and the second temperature and pressure sensor 23 is used to sense the temperature and pressure of the refrigerant flowing out of the refrigerant outlet of the refrigerator 21.

[0139] In the second embodiment, Figure 6 As shown, the cooling circuit of the air-conditioning system also includes a first one-way valve 24, the refrigerant inlet of the first one-way valve 24 is connected to the refrigerant outlet of the evaporator 18 and the refrigerant outlet of the refrigerator 21, and the refrigerant outlet of the first one-way valve 24 is connected to the refrigerant inlet of the gas-liquid separator 16, thereby ensuring that the refrigerant flowing out of the evaporator 18 and the refrigerator 21 can only enter the refrigerant channel of the gas-liquid separator 16 in one direction, avoiding refrigerant backflow.

[0140] In the second embodiment, Figure 6 As shown, the cooling circuit of the air conditioning system further includes a third temperature and pressure sensor 25 and a pressure sensor 26. The third temperature and pressure sensor 25 is disposed between the refrigerant outlet of the gas-liquid separator 16 and the refrigerant inlet of the compressor 17, and is used to sense the temperature and pressure of the refrigerant flowing out of the refrigerant outlet of the gas-liquid separator 16. The pressure sensor 26 is disposed at the refrigerant outlet of the compressor 17, and is used to sense the pressure of the refrigerant flowing out of the refrigerant outlet of the compressor 17.

[0141] In the second embodiment, Figure 6 As shown, the air conditioning system cooling circuit further includes an internal condenser 27 and a second four-way valve 28 , and the refrigerant outlet of the internal condenser 27 is connected to the refrigerant channel of the air conditioning water-cooled heat exchanger 15 .

[0142] The first liquid inlet A of the second four-way valve 28 is connected to the refrigerant outlet of the compressor 17, the first liquid outlet B of the second four-way valve 28 is connected to the refrigerant inlet of the gas-liquid separator 16, the first liquid outlet C of the second four-way valve 28 is connected to the refrigerant channel of the air-conditioning water-cooled heat exchanger 15, and the second liquid outlet D of the second four-way valve 28 is connected to the refrigerant inlet of the internal condenser 27, the refrigerant outlet of the refrigerator 21 and the refrigerant outlet of the evaporator 18.

[0143] When the first four-way valve 12 is in operation, the first liquid inlet A of the second four-way valve 28 is connected to the first liquid outlet C of the second four-way valve 28, and the first liquid outlet B of the second four-way valve 28 is connected to the second liquid outlet D of the second four-way valve 28. In this case, the first liquid outlet C of the second four-way valve 28 serves as the liquid outlet, and the second liquid outlet D of the second four-way valve 28 serves as the liquid inlet.

[0144] Alternatively, the first liquid inlet A of the second four-way valve 28 can be connected to the second liquid outlet D of the second four-way valve 28, and the first liquid outlet B of the second four-way valve 28 can be connected to the first liquid outlet C of the second four-way valve 28. In this case, the first liquid outlet C of the second four-way valve 28 serves as the liquid inlet, and the second liquid outlet D of the second four-way valve 28 serves as the liquid outlet. The refrigerant inlet of the internal condenser 27 can be connected to the refrigerant outlet of the compressor 17, thereby forming a corresponding air conditioning system loop that can be used for vehicle heating.

[0145] In the second embodiment, Figure 6 As shown, the air conditioning system cooling circuit further includes a third expansion valve 29 and a second one-way valve 30. The refrigerant inlet of the third expansion valve 29 is connected to the refrigerant outlet of the inner condenser 25, and the refrigerant outlet of the third expansion valve 29 is connected to the refrigerant channel of the air conditioning water-cooled heat exchanger 15, for controlling the refrigerant flow from the inner condenser 25 to the air conditioning water-cooled heat exchanger 15. The second one-way valve 30 is disposed between the refrigerant outlet of the compressor 17 and the refrigerant inlet of the inner condenser 27 to ensure that refrigerant can only flow from the compressor 17 to the inner condenser 27, preventing backflow.

[0146] The vehicle thermal management system provided by the second embodiment of the present invention is described in detail below in conjunction with specific working conditions.

[0147] Working condition 1, such as Figure 7 As shown, the ambient temperature is low and the vehicle is in the maximum cooling mode. The conduction valve 1013 of the auxiliary water tank 1 is closed.

[0148] Water pump and valve control: the engine water pump 9, the first water pump 13 and the second water pump 14 are running, the liquid port AC of the three-way valve 10 is connected, the liquid ports AB and CD of the first four-way valve 12 are connected, and the liquid ports AC and BD of the second four-way valve 28 are connected.

[0149] Cooling principle for motor 5, electronic control 4, and battery pack 11: The coolant, driven by first and second water pumps 13, 14, passes through low-temperature radiator 8, battery pack 11, DC / OBC 3, electronic control 4, and motor 5 before returning to second chamber 1002 of auxiliary water tank 1. During this process, the coolant absorbs heat from the battery pack 11, motor 5, electronic control 4, and DC / OBC 3, and dissipates the heat into the air through low-temperature radiator 8, thereby cooling the battery pack 11, motor 5, and electronic control 4. During this process, chiller 21 merely provides a cooling channel for the coolant to flow through, but cannot cool or even regenerate the coolant itself.

[0150] The cooling principle of the engine 2 is as follows: the coolant is driven by the engine water pump 9. After passing through the engine 2, part of it returns to the first cavity 1001 of the auxiliary water tank 1, and the rest flows to the high-temperature radiator 6. During this process, the coolant absorbs the heat of the engine 2 and can dissipate the heat into the air through the high-temperature radiator 6, thereby achieving the purpose of cooling the engine 2.

[0151] Air conditioning refrigeration principle: The refrigerant is driven by the compressor 17, passes through the air conditioning water-cooled heat exchanger 15, the first expansion valve 19, the evaporator 18 and the gas-liquid separator 16, and then returns to the compressor 4 to achieve the purpose of air conditioning refrigeration.

[0152] Working condition 2, such as Figure 8 As shown, the ambient temperature is high and the vehicle is in the maximum cooling mode. The conduction valve 1013 of the auxiliary water tank 1 is closed.

[0153] Water pump and valve control: the engine water pump 9, the first water pump 13 and the second water pump 14 are running, the liquid port AC of the three-way valve 10 is connected, the liquid ports AD and BC of the first four-way valve 12 are connected, and the liquid ports AC and BD of the second four-way valve 28 are connected.

[0154] Cooling principle of the motor 14 and the electronic control 13: The coolant is driven by the first water pump 13, passes through the low-temperature radiator 8, the DC / OBC 3, the electronic control 4 and the motor 5, and then returns to the second cavity 1002 of the auxiliary water tank 1. During this process, the coolant absorbs heat from the motor 5, the electronic control 4 and the DC / OBC 3, and dissipates the heat into the air through the low-temperature radiator 8, thereby achieving the purpose of cooling the motor 5 and the electronic control 4.

[0155] Cooling principle of the battery pack 11: The coolant is driven by the second water pump 14 and passes through the refrigerator 21 and the battery pack 11 in succession. During this process, the coolant absorbs heat from the battery pack 11 and transfers the heat to the cooling circuit of the air-conditioning system through the refrigerator 21, thereby achieving the purpose of cooling the battery pack 11.

[0156] The cooling principle of engine 2 is the same as that of the above-mentioned working condition 1 and will not be described in detail here.

[0157] Air conditioning refrigeration principle: Same as the above working condition 1, no further details will be given here.

[0158] Working condition three, such as Figure 9 As shown, the vehicle is in the maximum heating mode. The conduction valve 1013 of the auxiliary water tank 1 is opened, and the first cavity 1001 is connected to the second cavity 1002.

[0159] Water pump and valve control: the engine water pump 9, the first water pump 13 and the second water pump 14 are running, the liquid port BC of the three-way valve 10 is connected, the liquid ports AB and CD of the first four-way valve 12 are connected, and the liquid ports AD and BC of the second four-way valve 28 are connected.

[0160] The cooling principle of the battery pack 11, motor 14, and electronic control 13 is as follows: The coolant, driven by the first water pump 13, passes through the battery pack 11, DC / OBC 3, electronic control 4, and motor 5 before returning to the second chamber 1002 of the auxiliary water tank 1. The coolant absorbs heat from the battery pack 11, motor 5, electronic control 4, and DC / OBC 3, thereby cooling the battery pack 11, motor 5, and electronic control 4. During this process, the chiller 21 merely provides a cooling channel for the coolant to flow through, but cannot cool or even reheat the coolant itself.

[0161] The cooling principle of the engine 2 is as follows: the coolant is driven by the engine water pump 9, passes through the engine 2 and returns to the first cavity 1001 of the auxiliary water tank 1. During this process, the coolant absorbs the heat of the engine 2, thereby achieving the purpose of cooling the engine 2.

[0162] Air conditioning heating principle: The air conditioning water-cooled heat exchanger absorbs heat from the coolant flowing through the electric drive system cooling circuit and the battery cooling circuit. Driven by compressor 17, the heated refrigerant passes through the gas-liquid separator 16, compressor 4, and internal condenser 27 in sequence, achieving heating. When the electric drive system cooling circuit lacks residual heat, the conduction valve 1013 of the auxiliary water tank 1 opens, allowing the high-temperature coolant in the first chamber 1001 to mix with the low-temperature coolant in the second chamber 1002, recovering the residual heat from the high-temperature chambers and heating the battery pack 11 and the passenger compartment.

[0163] Example 3

[0164] like Figures 10 to 13 As shown, embodiment three of the present invention provides a vehicle thermal management system, including a first circulation loop, a second circulation loop and the auxiliary water tank 1 provided in the above embodiment one, the first circulation loop is connected to the first cavity 1001, and the second circulation loop is connected to the second cavity 1002.

[0165] In the third embodiment, the first cavity 1001 is a high-temperature cavity, and the second cavity 1002 is a low-temperature cavity. The first circulation loop includes an electric drive system cooling loop, and the second circulation loop includes a battery cooling loop.

[0166] In the third embodiment, Figure 10 As shown, the electric drive system cooling circuit includes a DC / OBC 3, an electronic control 4 and a motor 5. The cooling channels of the DC / OBC 3, the cooling channels of the electronic control 4 and the cooling channels of the motor 5 are sequentially connected between the first filling port 1015 and the first return port 1016 to form a cooling circuit for the electric drive assembly, thereby cooling the various components of the electric drive assembly.

[0167] It should be noted that, in other embodiments not shown in the figures, the relative positions of the DC / OBC, the electronic control and the motor may not be consistent with those in the illustrated embodiment, and may be specifically configured as needed.

[0168] In the third embodiment, Figure 10 As shown, the electric drive system cooling circuit also includes an electrically controlled radiator 31. The inlet of the cooling channel of the electrically controlled radiator 31 is connected to the first filling port 1015, and the outlet of the cooling channel of the electrically controlled radiator is connected to the inlet of the cooling channel of the DC / OBC 3. The provision of the electrically controlled radiator 31 can further cool the electric drive components, thereby improving the cooling effect of the electric drive components.

[0169] In the third embodiment, Figure 10 As shown, the electric drive system cooling circuit also includes a first three-way valve 33, the first liquid inlet A of the first three-way valve 33 is connected to the first filling port 1015, the first liquid outlet B of the first three-way valve 33 is connected to the inlet of the cooling channel of the electronically controlled radiator 31, and the second liquid outlet C of the first three-way valve 33 is connected to the inlet of the cooling channel of the DC / OBC 3, so that the cooling channel of the DC / OBC 3 can be supplied with coolant through two flow paths. The two flow paths are: a flow path that flows out from the first cavity 1001 and supplies the cooling channel of the electronically controlled radiator 31 (as shown in FIG. 1 ). Figure 11 and Figure 12 and a flow path directly supplied by the first cavity 1001 (as shown); Figure 13 shown).

[0170] In the third embodiment, Figure 10As shown, the electric drive system cooling circuit also includes a first water pump 13, which is connected between the first filling port 1015 and the inlet of the cooling channel of the DC / OBC 3 (or the first liquid inlet A of the first three-way valve 33, or the inlet of the cooling channel of the electronically controlled radiator 31). The first water pump 13 is provided to ensure the coolant flow rate of the electric drive system cooling circuit.

[0171] In the third embodiment, Figure 10 As shown, the battery cooling circuit includes a battery pack 11 , and the cooling channel of the battery pack 11 is connected between the second filling port 1017 and the second return port 1018 to form a cooling circuit of the battery pack 11 to cool the battery pack 11 .

[0172] In the third embodiment, Figure 10 As shown, the battery cooling circuit further includes a second water pump 14, which is connected between the second filling port 1017 and the inlet of the cooling channel of the battery pack 11. The second water pump 14 is provided to ensure the coolant flow rate of the battery cooling circuit.

[0173] In the third embodiment, Figure 10 As shown, the battery cooling circuit also includes a battery radiator 32. The inlet of the cooling channel of the battery radiator 32 is connected to the second filling port 1017 (or the outlet of the second water pump 14), and the outlet of the cooling channel of the battery radiator 32 is connected to the inlet of the cooling channel of the battery pack. The battery radiator 32 further dissipates heat from the battery pack 11, thereby improving the cooling effect of the battery pack 11.

[0174] In the third embodiment, Figure 10 As shown, the vehicle thermal management system further includes an air conditioning system cooling circuit. The structure of the air conditioning system cooling circuit is the same as that of the air conditioning system cooling circuit in Example 2, and will not be repeated here.

[0175] In the third embodiment, Figure 10As shown, the battery cooling circuit also includes a refrigerator 21, and the refrigerator 21 has a refrigerant channel and a cooling flow channel. The cooling flow channel of the battery pack 11 is connected to the cooling flow channel of the refrigerator 21. Specifically, the inlet of the cooling flow channel of the refrigerator 21 is connected to the second filling port 1017 (or the liquid outlet of the second water pump 14), and the outlet of the cooling flow channel of the refrigerator 21 is connected to the inlet of the cooling flow channel of the battery pack 11. The refrigerant channel of the refrigerator 21 is connected between the refrigerant channel of the air-conditioning water-cooled heat exchanger 15 and the refrigerant inlet of the gas-liquid separator 16. When the refrigerator 21 is working, the heat of the coolant flowing through the refrigerator 21 can be transferred to the refrigerant in the refrigerant channel of the refrigerator 21, thereby reducing the temperature of the coolant in the battery cooling circuit, and further cooling the battery pack 11.

[0176] In the third embodiment, Figure 10 As shown, the battery cooling circuit also includes a second three-way valve 34, a first liquid inlet A of the second three-way valve 34 is connected to the second filling port 1017 (or the liquid outlet of the second water pump 14), a first liquid outlet B of the second three-way valve 34 is connected to the inlet of the cooling channel of the battery radiator 32, and a second liquid outlet C of the second three-way valve 34 is connected to the inlet of the cooling channel of the refrigerator 21, so that the coolant in the battery cooling circuit can be cooled by the battery radiator 32 and / or the refrigerator 21.

[0177] The vehicle thermal management system provided by the third embodiment of the present invention is described in detail below in conjunction with specific working conditions.

[0178] Working condition 4, such as Figure 11 As shown, the ambient temperature is low and the vehicle is in the maximum cooling mode. The conduction valve 1013 of the auxiliary water tank 1 is closed.

[0179] Water pump and valve control: the first water pump 13 and the second water pump 14 are running, the liquid ports AB of the first three-way valve 33 are connected, the liquid ports AB of the second three-way valve 34 are connected, and the liquid ports AC and BD of the second four-way valve 28 are connected.

[0180] Cooling principle of the motor 5 and the electronic control 4: The coolant is driven by the first water pump 13, passes through the electronic control radiator 31, DC / OBC 3, electronic control 4 and motor 5, and then returns to the first cavity 1001 of the auxiliary water tank 1. During this process, the coolant absorbs heat from the motor 5, electronic control 4 and DC / OBC 3, and dissipates the heat into the air through the electronic control radiator 31, thereby achieving the purpose of cooling the motor 5 and electronic control 4.

[0181] Cooling principle of the battery pack 11: The coolant is driven by the second water pump 14, passes through the battery radiator 32 and the battery pack 11, and then returns to the second cavity 1002 of the auxiliary water tank 1. During this process, the coolant absorbs the heat of the battery pack 11 and dissipates the heat into the air through the battery radiator 32, thereby achieving the purpose of cooling the battery pack 11.

[0182] Air conditioning refrigeration principle: The refrigerant is driven by the compressor 17, passes through the air conditioning water-cooled heat exchanger 15, the first expansion valve 19, the evaporator 18 and the gas-liquid separator 16, and then returns to the compressor 4 to achieve the cooling purpose.

[0183] Working condition five, such as Figure 12 As shown, the ambient temperature is high and the vehicle is in the maximum cooling mode. The conduction valve 1013 of the auxiliary water tank 1 is closed.

[0184] Water pump and valve control: the first water pump 13 and the second water pump 14 are running, the liquid port AB of the first three-way valve 33 is connected, the liquid port AC of the second three-way valve 34 is connected, and the liquid ports AC and BD of the second four-way valve are connected.

[0185] The cooling principle of the motor 14 and the electronic control 13 is the same as that of the above-mentioned working condition 4 and will not be repeated here.

[0186] Cooling principle of the battery pack 11: The coolant is driven by the second water pump 14 and passes through the refrigerator 21 and the battery pack 11 in succession. During this process, the coolant absorbs heat from the battery pack 11 and transfers the heat to the cooling circuit of the air-conditioning system through the refrigerator 21, thereby achieving the purpose of cooling the battery pack 11.

[0187] Air conditioning refrigeration principle: Same as the above working condition 1, no further details will be given here.

[0188] Working condition six, such as Figure 13 As shown, the vehicle is in the maximum heating mode. The conduction valve 1013 of the auxiliary water tank 1 is opened, and the first cavity 1001 is connected to the second cavity 1002.

[0189] Water pump and valve control: the first water pump 13 and the second water pump 14 are running, the liquid port AC of the first three-way valve 33 is connected, the liquid port AC of the second three-way valve 34 is connected, and the liquid ports AD and BC of the second four-way valve 28 are connected.

[0190] Cooling principle of the motor 14 and electronic control 13: The coolant is driven by the first water pump 13, passes through the battery pack 11, DC / OBC 3, electronic control 4 and motor 5, and then returns to the second cavity 1002 of the auxiliary water tank 1. During this process, the coolant absorbs heat from the motor 5, electronic control 4 and DC / OBC 3, thereby achieving the purpose of cooling the motor 5 and electronic control 4.

[0191] The cooling principle of the battery pack 11: The coolant, driven by the second water pump 14, flows through the battery pack 11 and back into the second cavity 1002. The coolant absorbs heat from the battery pack 11, thereby cooling the battery pack 11. During this process, the refrigerator 21 only provides a cooling channel for the coolant to pass through, but cannot cool or even reheat the coolant flowing through it.

[0192] Air conditioning heating principle: The air conditioning water-cooled heat exchanger absorbs heat from the coolant flowing through the electric drive system's cooling circuit. Driven by compressor 17, the heated refrigerant passes through gas-liquid separator 16, compressor 4, and internal condenser 27, achieving heating. When the electric drive system's cooling circuit lacks residual heat, the conduction valve 1013 in auxiliary water tank 1 opens, allowing the high-temperature coolant in first chamber 1001 to mix with the low-temperature coolant in second chamber 1002, recovering the residual heat from the high-temperature chamber and heating the battery pack 11.

[0193] Example 4

[0194] A fourth embodiment of the present invention provides a vehicle thermal management system, including the auxiliary water tank 1 provided in the first embodiment, or including the vehicle thermal management system provided in the second or third embodiment.

[0195] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A secondary water tank, characterized in that: The invention comprises a box body and a box cover, wherein the box body is provided with a first cavity, a second cavity and a liquid filling cavity separated from each other; the liquid filling cavity is provided with a first filling hole for communicating with the first cavity and a second filling hole for communicating with the second cavity; The box cover is detachably inserted into the liquid filling cavity and blocks the first filling hole and the second filling hole to separate the liquid filling cavity from the first cavity and the second cavity; When the box cover is detached from the liquid injection cavity, the liquid injection cavity is communicated with the first cavity through the first filling hole, and the liquid injection cavity is communicated with the second cavity through the second filling hole.

2. The auxiliary water tank according to claim 1, characterized in that: The box body is further provided with a conducting valve; the conducting valve is located between the first cavity and the second cavity, and the conducting valve can connect the first cavity and the second cavity when it is opened.

3. The auxiliary water tank according to claim 1, characterized in that: The box body includes a shell and a partition structure, wherein the partition structure is arranged in the shell and is used to separate the inner cavity of the shell into the first cavity and the second cavity; The partition structure is provided with the liquid injection cavity, the first filling hole and the second filling hole.

4. The auxiliary water tank according to claim 3, characterized in that: The partition structure includes a partition frame, which is arranged in the shell and is used to separate the inner cavity of the shell into the first cavity and the second cavity; The partition frame is provided with the liquid injection cavity, the first filling hole and the second filling hole.

5. The auxiliary water tank according to claim 4, characterized in that: The partition frame includes a first partition, a second partition, and a liquid injection cylinder. The first partition and the second partition are arranged in the box body with spacing. The liquid injection cylinder is arranged between the first partition and the second partition. The liquid injection cylinder is provided with the liquid injection cavity, the first filling hole, and the second filling hole. The first cavity is formed between the side of the first partition facing away from the second partition and the shell, and the second cavity is formed between the side of the second partition facing away from the first partition and the shell.

6. The auxiliary water tank according to claim 4, characterized in that: The partition frame is also provided with a notch; the partition structure further includes a conduction valve, which is provided at the notch and has an open state and a closed state; When the conduction valve is in an open state, the first cavity and the second cavity can be communicated through the gap; When the conducting valve is in a closed state, the first cavity and the second cavity are disconnected at the notch by the conducting valve.

7. The auxiliary water tank according to claim 6, characterized in that: The conduction valve includes a valve and a drive assembly, wherein the valve is arranged at the notch, and the drive assembly is mounted on the housing and connected to the valve; the drive assembly is used to drive the valve to move so that the conduction valve switches back and forth between the open state and the closed state; When the conducting valve is in an open state, the valve is opened to release the blockage of the gap, so that the first cavity and the second cavity can be communicated through the gap; When the conducting valve is in a closed state, the valve is closed to block the gap, so that the first cavity and the second cavity are disconnected at the gap by the valve.

8. The auxiliary water tank according to claim 1, characterized in that: The injection cavity is further provided with a first pressure relief hole communicating with the first cavity and a second pressure relief hole communicating with the second cavity; The box cover includes a cover body and a pressure relief assembly. The cover body is detachably inserted into the liquid injection cavity. The cover body is provided with a pressure relief cavity and an air hole, a third pressure relief hole, and a fourth pressure relief hole communicating with the pressure relief cavity. The air hole is used to communicate with the outside air. When the cover body is inserted into the liquid injection cavity, the cover body can block the first filling hole and the second filling hole, and communicate the first pressure relief hole with the third pressure relief hole, and the second pressure relief hole with the fourth pressure relief hole. The pressure relief component is installed in the pressure relief chamber, and the pressure relief component has a pressure relief state and a blocking state; When the pressure relief assembly is in a pressure relief state, the air hole is connected to the third pressure relief hole and the fourth pressure relief hole; When the pressure relief assembly is in a blocked state, the air hole disconnects the third pressure relief hole and the fourth pressure relief hole.

9. The auxiliary water tank according to claim 8, characterized in that: The pressure relief assembly includes a seal, a first pressure relief valve, a first elastic member, a second pressure relief valve, and a second elastic member. The seal is installed in the pressure relief chamber and divides the pressure relief chamber into a first sub-chamber and a second sub-chamber. The seal is provided with a first vent hole, which communicates between the first sub-chamber and the second sub-chamber. The air hole is in communication with the first sub-chamber, and the third pressure relief hole and the fourth pressure relief hole are in communication with the second sub-chamber respectively; The first pressure relief valve and the first elastic member are respectively installed in the first sub-chamber, and the first elastic member is elastically supported between the surface of the first pressure relief valve facing away from the sealing member and the cover body; the first pressure relief valve is provided with a second vent hole, and the second vent hole is connected to the first vent hole and the first sub-chamber; The second pressure relief valve and the second elastic member are respectively installed in the second sub-chamber, and the second elastic member is elastically supported between a side surface of the second pressure relief valve facing away from the sealing member and the cover body; When the pressure relief assembly is in a pressure relief state, the second pressure relief valve moves away from the first pressure relief valve, or the first pressure relief valve moves away from the second pressure relief valve, so that the air hole is connected to the third pressure relief hole and the fourth pressure relief hole through the first sub-chamber, the second vent hole, and the second sub-chamber in sequence; When the pressure relief assembly is in a blocked state, the first pressure relief valve and the second pressure relief valve are sealed by the sealing member.

10. The auxiliary water tank according to claim 1, characterized in that: The box body is further provided with a liquid injection port, the liquid injection cavity is communicated with the liquid injection port, and the box cover can be inserted into the liquid injection cavity through the liquid injection port.

11. The auxiliary water tank according to claim 1, characterized in that: The box body is further provided with a first filling port, a first return port, a second filling port and a second return port, the first filling port and the first return port are respectively connected to the first cavity, and the first filling port and the first return port are used to communicate with the first circulation loop of the vehicle thermal management system; The second filling port and the second return port are respectively communicated with the second cavity, and the second filling port and the second return port are used to communicate with a second circulation loop of the vehicle thermal management system.

12. A vehicle thermal management system, characterized in that: It comprises a first circulation loop, a second circulation loop and the auxiliary water tank according to any one of claims 1 to 10, wherein the first circulation loop is connected to the first cavity, and the second circulation loop is connected to the second cavity.

13. The vehicle thermal management system according to claim 12, characterized in that: The box body is further provided with a first filling port, a first return port, a second filling port and a second return port, the first filling port and the first return port are respectively connected to the first cavity, and the second filling port and the second return port are respectively connected to the second cavity; The first circulation loop is connected between the first filling port and the first return port, and the second circulation loop is connected between the second filling port and the second return port.

14. The vehicle thermal management system according to claim 13, characterized in that: The first cavity is a high-temperature cavity, and the second cavity is a low-temperature cavity; the first circulation loop includes an engine system cooling loop, and the second circulation loop includes an electric drive system cooling loop; The engine system cooling circuit includes an engine, and a cooling flow channel of the engine is connected between the first filling port and the first return port; The electric drive system cooling circuit includes a DC / OBC, an electronic control, and a motor. The cooling channels of the DC / OBC, the electronic control, and the motor are sequentially connected between the second filling port and the second return port.

15. The vehicle thermal management system according to claim 14, characterized in that: The engine system cooling circuit further includes a high-temperature radiator and a fan, wherein the inlet of the cooling flow channel of the high-temperature radiator is connected to the outlet of the cooling flow channel of the engine, and the outlet of the cooling flow channel of the high-temperature radiator is connected to the inlet of the cooling flow channel of the engine, and the fan is used to blow away the heat emitted by the high-temperature radiator; The electric drive system cooling circuit further includes a low-temperature radiator, and a cooling channel of the low-temperature radiator is connected between the second filling port and an inlet of the cooling channel of the DC / OBC.

16. The vehicle thermal management system according to claim 14, characterized in that: The second circulation loop further includes a battery cooling loop and a first four-way valve, wherein the battery cooling loop includes a battery pack; The first liquid inlet of the first four-way valve is connected to the second filling port, the first liquid outlet of the first four-way valve is connected to the inlet of the cooling channel of the battery pack, the second liquid inlet of the first four-way valve is connected to the outlet of the cooling channel of the battery pack, and the second liquid outlet of the first four-way valve is connected to the inlet of the cooling channel of the DC / OBC; The first liquid inlet of the first four-way valve is connected to the first liquid outlet of the first four-way valve, and the second liquid inlet of the first four-way valve is connected to the second liquid outlet of the first four-way valve; or, the first liquid inlet of the first four-way valve is connected to the second liquid outlet of the first four-way valve, and the second liquid inlet of the first four-way valve is connected to the first liquid outlet of the first four-way valve.

17. The vehicle thermal management system according to claim 13, wherein: The first cavity is a high-temperature cavity, and the second cavity is a low-temperature cavity; the first circulation loop includes an electric drive system cooling loop, and the second circulation loop includes a battery cooling loop; The electric drive system cooling circuit includes a DC / OBC, an electronic control, and a motor, wherein the cooling channel of the DC / OBC, the cooling channel of the electronic control, and the cooling channel of the motor are sequentially connected between the first filling port and the first return port; The battery cooling circuit includes a battery pack, and a cooling channel of the battery pack is connected between the second filling port and the second return port.

18. The vehicle thermal management system according to claim 17, characterized in that: The electric drive system cooling circuit also includes an electronically controlled radiator, the inlet of the cooling channel of the electronically controlled radiator is connected to the first filling port, and the outlet of the cooling channel of the electronically controlled radiator is connected to the inlet of the cooling channel of the DC / OBC.

19. The vehicle thermal management system according to claim 17, wherein: The battery cooling circuit further includes a battery radiator, wherein an inlet of a cooling channel of the battery radiator is communicated with the second filling port, and an outlet of the cooling channel of the battery radiator is communicated with an inlet of a cooling channel of the battery pack.

20. The vehicle thermal management system according to claim 16 or 17, characterized in that: The vehicle thermal management system further includes an air conditioning system cooling circuit, which includes an air conditioning water-cooled heat exchanger, a gas-liquid separator, and a compressor. The air conditioning water-cooled heat exchanger has a refrigerant channel and a cooling flow channel, and the cooling flow channel of the air conditioning water-cooled heat exchanger is connected to the electric drive system cooling circuit; The refrigerant channel of the air-conditioning water-cooled heat exchanger is connected between the refrigerant inlet of the gas-liquid separator and the refrigerant outlet of the compressor, and the refrigerant outlet of the gas-liquid separator is connected to the refrigerant inlet of the compressor.

21. The vehicle thermal management system according to claim 20, characterized in that: The air conditioning system cooling circuit further includes an evaporator, the refrigerant inlet of the evaporator is connected to the refrigerant channel of the air conditioning water-cooled heat exchanger, and the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the gas-liquid separator.

22. The vehicle thermal management system according to claim 20, characterized in that: The battery cooling circuit also includes a refrigerator, which has a refrigerant channel and a cooling flow channel. The cooling flow channel of the battery pack is connected to the cooling flow channel of the refrigerator, and the refrigerant channel of the refrigerator is connected between the refrigerant channel of the air-conditioning water-cooled heat exchanger and the refrigerant inlet of the gas-liquid separator.

23. The vehicle thermal management system according to claim 20, wherein: The air conditioning system cooling circuit further includes an internal condenser, the refrigerant inlet of the internal condenser is connected to the refrigerant outlet of the compressor, and the refrigerant outlet of the internal condenser is connected to the refrigerant channel of the air conditioning water-cooled heat exchanger.

24. A vehicle, characterized in that: It includes the auxiliary water tank described in any one of claims 1-11 or the vehicle thermal management system described in any one of claims 12-23.

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