A filtering structure for a vehicle battery cooling system

Abstract

The utility model relates to the technical field of automobile battery cooling system, and more specifically, to a filtering structure of automobile battery cooling system, which includes a mounting assembly for connecting with a pipeline, the mounting assembly is provided with an inner cavity for communicating with the pipeline, a filter is provided in the inner cavity, and the filter separates the two ends of the inner cavity. The utility model overcomes the shortcomings of the prior art that the expansion valve is easily blocked by aluminum debris, which eventually leads to the failure of the cooling system. The utility model filters the aluminum debris in the pipeline of the automobile battery cooling system through the filter, which can prevent the aluminum debris from entering the expansion valve and causing the expansion valve to be blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile battery cooling systems, and more specifically to a filtering structure of an automobile battery cooling system. Background Art

[0002] The function of the car battery cooling system is to regulate the temperature of the car battery by circulating coolant to protect the safety and stable operation of the battery.

[0003] As disclosed in the prior art, a vehicle power battery direct cooling system and a vehicle include a compressor, a condensing mechanism, a first expansion valve, a second expansion valve, a battery direct cooling heat exchanger, an in-vehicle evaporator, and an intermediate heat exchanger; the compressor, the condensing mechanism, the first expansion valve and the in-vehicle evaporator are connected in sequence through pipes to form a first cooling pipe loop; the compressor, the condensing mechanism, the second expansion valve and the battery direct cooling heat exchanger are connected in sequence through pipes to form a second cooling pipe loop; wherein the intermediate heat exchanger is internally provided with a first heat exchange pipe and a second heat exchange pipe, the first heat exchange pipe being a part of a pipe connecting the compressor and the battery direct cooling heat exchanger; the second heat exchange pipe being a part of a pipe connecting the compressor and the battery direct cooling heat exchanger.

[0004] In the above technical solution, when the battery needs to be cooled, the compressor compresses the low-pressure and low-temperature gas-phase refrigerant into a high-temperature and high-pressure gas-phase refrigerant; the high-temperature and high-pressure gas-phase refrigerant passes through the condenser and is condensed into a high-temperature and high-pressure liquid-phase refrigerant under the cooling of the cooling fan; the high-temperature and high-pressure liquid-phase refrigerant passes through the second expansion valve for throttling and expansion, and then enters the battery direct cooling heat exchanger to absorb heat to achieve the cooling function of the battery. The pipeline loop is generally made of aluminum products, and its inner wall is often adhered to aluminum debris, which will fall off under the long-term flushing of the refrigerant. For debris with a width greater than 0.5mm, it is very likely to cause blockage inside the expansion valve. When the internal channel of the expansion valve is blocked, it will first cause changes in the flow and pressure of the refrigerant, resulting in a decrease in the refrigeration effect; secondly, it will cause the flow of the refrigerant to be limited, increase the degree of wear of the compressor, and eventually cause damage to the compressor; thirdly, it may cause failures of the entire cooling system, such as refrigerant leakage, condenser burst, etc. Utility Model Content

[0005] In view of the problem in the prior art that the expansion valve is easily blocked by aluminum debris, which eventually leads to cooling system failure, the utility model provides a filtering structure for an automobile battery cooling system, which can filter out the debris in the pipeline to avoid blockage of the expansion valve.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0007] A filtering structure of a car battery cooling system comprises a mounting assembly for connecting with a pipeline, wherein the mounting assembly is provided with an inner cavity for communicating with the pipeline, a filter is provided in the inner cavity, and the filter separates two ends of the inner cavity.

[0008] In the above technical solution, the mounting assembly is connected to the pipeline of the automobile battery cooling system, so that the inner cavity is connected to the pipeline and is located at the liquid inlet end of the expansion valve of the automobile battery cooling system. When aluminum debris inside the pipeline passes through the filter element, the filter element can intercept the aluminum debris on one side of the filter element to prevent the aluminum debris from entering the expansion valve, thereby avoiding clogging of the expansion valve.

[0009] The filter element may be a filter screen, a membrane filter, or a filter element made of porous materials such as ceramics, etc.

[0010] Preferably, the filter element is provided with a plurality of through holes, and the filter element arches from one side thereof to the other side thereof along the axial direction of the inner cavity, and forms a receiving groove for receiving debris. Such a filter element is a filter screen, which has good permeability, can not only efficiently intercept aluminum debris, but also ensure the normal flow of refrigerant. The arching to form a receiving groove can increase the filtering area, thereby further improving the filtering efficiency.

[0011] Preferably, the mounting assembly includes a first connector and a second connector detachably connected to the first connector, and the inner cavity passes through the first connector and the second connector; at least a portion of the first connector is located on one side of the filter element to limit the movement of the filter element toward the liquid inlet side of the inner cavity, and at least a portion of the second connector is located on the other side of the filter element to limit the movement of the filter element toward the liquid outlet side of the inner cavity. When the filter element is clogged or damaged, the connection between the first connector and the second connector can be released, and the filter element can be taken out from between the first connector and the second connector for cleaning or replacement, so that there is no need to adjust or replace the entire filter structure, which is conducive to saving the maintenance and use costs of the filter structure.

[0012] Preferably, the outer edge of the filter element is provided with a clamping portion; the first connecting member is provided with a first through cavity inside, and a first limiting portion is provided on the inner wall of the first through cavity; the second connecting member is provided with a second through cavity inside, and the first through cavity and the second through cavity form the inner cavity, and one end of the second connecting member is provided with a mounting groove connected to the second through cavity, and the clamping portion is located between the first limiting portion and the inner wall of the mounting groove, and one side of the clamping portion is in contact with the inner wall of the mounting groove; the second connecting member is provided with a shoulder and a first outer circumferential surface outside; the shoulder abuts against one end of the first connecting member, and the first outer circumferential surface is in contact with the inner wall of the first through cavity. It can be understood that the first limiting portion and the inner wall of the mounting groove can respectively limit the movement of the filter element to the two ends of the inner cavity. The first outer circumferential surface and the first through cavity with a circular cross section are easier to process than other shapes. Inserting one end of the second connecting member into the first through cavity and in contact with the inner wall of the first through cavity can improve the connection sealing of the first connecting member and the second connecting member and reduce the risk of refrigerant leakage.

[0013] Preferably, the second connecting member is further provided with a second outer circumferential surface on the outside, the shoulder is located between the first outer circumferential surface and the second outer circumferential surface, the side of the shoulder close to the second outer circumferential surface is used to abut against the expansion valve, and the second outer circumferential surface is used to fit with the inner wall of the installation cavity of the expansion valve. It should be noted that the expansion valve in the prior art is provided with a mounting cavity for inserting a pipe. The second outer circumferential surface can fit with the installation cavity of the expansion valve, so that the second connecting member is directly connected to the expansion valve, thereby eliminating the pipe section between the second connecting member and the expansion valve, which is conducive to simplifying the structure of the entire battery cooling system.

[0014] Preferably, a first sealing ring and a second sealing ring are respectively sleeved on the first outer circumferential surface and the second outer circumferential surface, the outer ring of the first sealing ring abuts against the inner wall of the first through cavity, and the outer ring of the second sealing ring is used to abut against the inner wall of the installation cavity of the expansion valve. The first sealing ring can improve the sealing performance of the connection between the first connecting member and the second connecting member, and the second sealing ring can improve the sealing performance of the connection between the second connecting member and the expansion valve, thereby preventing refrigerant leakage.

[0015] Preferably, the first outer circumferential surface and the second outer circumferential surface are respectively provided with a first annular groove and a second annular groove, and the first sealing ring and the second sealing ring are respectively mounted on the first annular groove and the second annular groove. The first annular groove and the second annular groove can respectively prevent the first sealing ring and the second sealing ring from falling off.

[0016] The first connecting member and the second connecting member may be connected by snap-fitting, screws, or binding straps.

[0017] Preferably, a screw is further included, and the first connecting member and the second connecting member are respectively provided with a first threaded hole and a second threaded hole, and the screw is threadedly connected to the first threaded hole and the second threaded hole at the same time, and at least a part of the screw is used to connect to the expansion valve. The first connecting member and the second connecting member are connected by the screw, and the structure of the screw is relatively simple, and installation and removal are more convenient. In the use state, the screw passes through the first connecting member, the second connecting member and the expansion valve at the same time, so that the three are firmly connected.

[0018] Preferably, an extension is provided on one side of the first connector close to the shoulder, and the extension extends outward from the first connector along the radial direction of the first through cavity, that is, extends in a direction away from the axis of the first through cavity, and the extension abuts against the shoulder; the first threaded hole and the second threaded hole are respectively provided on the extension and the shoulder. Providing the first threaded hole and the second threaded hole on the extension and the shoulder respectively is more convenient for processing, and stress can also be concentrated on the extension and the shoulder, which is conducive to maintaining the integrity and longer service life of the first connector and the second connector.

[0019] Preferably, the extension portion has a second limiting portion protruding from one end close to the shoulder portion, the shoulder portion is provided with a limiting groove, and the second limiting portion is fitted with the inner wall of the limiting groove. Before the screw is passed through the first threaded hole and the second threaded hole, the second limiting portion is first embedded in the limiting groove, so that the axes of the first threaded hole and the second threaded hole remain coincident, making it easier to screw the screw in.

[0020] The beneficial effects of the utility model are as follows: the filter element is used to filter aluminum debris in the pipeline of the automobile battery cooling system, so that the aluminum debris can be prevented from entering the expansion valve and causing the expansion valve to be blocked; the filter element is arched to form a receiving groove that can accommodate the debris, and the filtering area is large, which can improve the filtering efficiency; the filter element is detachable, and it is easy to clean and replace; the connection between the first connecting member and the second connecting member has high sealing performance, and the second connecting member can also form a tight connection with the expansion valve, so the refrigerant is not easy to leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a filter structure of an automobile battery cooling system;

[0022] Figure 2 is a cross-sectional view of a filter structure of an automotive battery cooling system;

[0023] Figure 3 It is a schematic diagram of the structure of the filter element;

[0024] Figure 4 is a schematic structural diagram of a first connecting member;

[0025] Figure 5is a schematic structural diagram of a second connecting member;

[0026] Figure 6 1 is a schematic diagram of the structure of the first annular groove and the second annular groove;

[0027] Figure 7 It is a structural schematic diagram of an expansion valve in the prior art;

[0028] Figure 8 It is a structural schematic diagram of a vehicle battery cooling system;

[0029] Fig. 9 It is a partial structural diagram of a car battery cooling system.

[0030] In the accompanying drawings: 1-installation assembly; 101-inner cavity; 2-filter element; 201-accommodating groove; 202-clamping portion; 3-first connecting member; 301-first through cavity; 302-first limiting portion; 303-first threaded hole; 304-extension portion; 305-second limiting portion; 4-second connecting member; 401-shoulder; 402-first outer circumferential surface; 403-second through cavity, 404-installation groove; 405-second outer circumferential surface; 406-first annular groove; 407-second annular groove; 408-second threaded hole; 409-limiting groove; 5-first sealing ring; 6-second sealing ring; 7-compressor; 8-condenser; 9-expansion valve; 901-installation cavity; 902-threaded blind hole; 10-evaporator; 11-battery pack assembly; 12-pipeline. DETAILED DESCRIPTION

[0031] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1

[0035] like Figures 1 to 3 A filtering structure of a vehicle battery cooling system is shown, which includes an installation component 1 for connecting to a pipe 12. The installation component 1 is provided with an inner cavity 101 for communicating with the pipe 12. A filter element 2 is provided in the inner cavity 101. The filter element 2 separates the two ends of the inner cavity 101.

[0036] Furthermore, the filter element 2 is provided with a plurality of through holes (not shown in the figure), and the filter element 2 is in a mesh shape. The filter element 2 is arched from one side of itself toward the other side along the axial direction of the inner cavity 101, and forms a receiving groove 201 for receiving debris. Such a filter element 2 is a filter screen, which has good permeability, can not only efficiently intercept aluminum debris, but also ensure the normal flow of refrigerant. The arching to form the receiving groove 201 can increase the filtering area, thereby further improving the filtering efficiency.

[0037] The working principle or workflow of this embodiment is as follows: Figure 8 , Fig. 9 As shown, during implementation, the mounting assembly 1 is connected to the pipe 12 of the automobile battery cooling system, so that the inner cavity 101 is in communication with the pipe 12 of the automobile battery cooling system and is located at the liquid inlet end of the expansion valve 9. When the aluminum debris inside the pipe 12 passes through the filter element 2, the filter element 2 can intercept the aluminum debris on one side of the filter element 2, preventing the aluminum debris from entering the expansion valve 9, thereby avoiding clogging of the expansion valve 9.

[0038] The beneficial effects of this embodiment are as follows: the filter element is used to filter the aluminum debris in the automobile battery cooling system pipeline, thereby preventing the aluminum debris from entering the expansion valve and causing the expansion valve to be blocked; the filter element is arched to form a receiving groove that can accommodate the debris, the filtering area is large, and the filtering efficiency can be improved.

[0039] Example 2

[0040] This embodiment is based on embodiment 1. Figures 1 to 6As shown, the installation assembly 1 includes a first connector 3 and a second connector 4 detachably connected to the first connector 3, and the inner cavity 101 passes through the first connector 3 and the second connector 4; a portion of the first connector 3 is located on one side of the filter element 2 to limit the movement of the filter element 2 toward the liquid inlet side of the inner cavity 101, and a portion of the second connector 4 is located on the other side of the filter element 2 to limit the movement of the filter element 2 toward the liquid outlet side of the inner cavity 101. When the filter element 2 is blocked or damaged, the connection between the first connector 3 and the second connector 4 can be released, and the filter element 2 can be taken out from between the first connector 3 and the second connector 4 for cleaning or replacement, so that there is no need to adjust or replace the entire filter structure, which is conducive to saving the maintenance and use costs of the filter structure.

[0041] Specifically, a clamping portion 202 is provided on the outer edge of the filter element 2; a first through cavity 301 is provided inside the first connecting member 3, the first through cavity 301 runs through both ends of the first connecting member 3, and a first limiting portion 302 is provided on the inner wall of the first through cavity 301; a second through cavity 403 is provided inside the second connecting member 4, the second through cavity 403 runs through both ends of the second connecting member 4, the first through cavity 301 and the second through cavity 403 form an inner cavity 101, one end of the second connecting member 4 is provided with a mounting groove 404 connected to the second through cavity 403, the clamping portion 202 is located between the first limiting portion 202 and the inner wall of the mounting groove 404, and one side of the clamping portion 202 is in contact with the inner wall of the mounting groove 404; a shoulder 401 and a first outer circumferential surface 402 are provided on the outside of the second connecting member 4; the shoulder 401 abuts against one end of the first connecting member 3, and the first outer circumferential surface 402 is in contact with the inner wall of the first through cavity 301. It is understandable that the first limit portion 202 and the inner wall of the mounting groove 404 can respectively limit the movement of the filter element 2 toward the two ends of the inner cavity 101. The first outer circumferential surface 402 and the first through cavity 301 with a circular cross section are easier to process than other shapes. Inserting one end of the second connecting member 4 into the first through cavity 301 and fitting it with the inner wall of the first through cavity 301 can improve the connection sealing of the first connecting member 3 and the second connecting member 4 and reduce the risk of refrigerant leakage.

[0042] Furthermore, if Figure 2 , Figure 5 and Figure 7As shown, the second connector 4 is also provided with a second outer circumferential surface 405 on the outside, the shoulder 401 is located between the first outer circumferential surface 402 and the second outer circumferential surface 405, the side of the shoulder 401 close to the second outer circumferential surface 405 is used to abut against the expansion valve 9, and the second outer circumferential surface 405 is used to fit with the inner wall of the installation cavity 901 of the expansion valve 9. It should be noted that the expansion valve 9 in the prior art is provided with a mounting cavity 901 for inserting a pipeline. The second outer circumferential surface 405 can fit with the mounting cavity 901 of the expansion valve 9, so that the second connector 4 is directly connected to the expansion valve 9, thereby eliminating the pipe section between the second connector 4 and the expansion valve 9, which is conducive to simplifying the structure of the entire battery cooling system.

[0043] Furthermore, if Figure 2 , Figure 5 and Figure 6 As shown, two first sealing rings 5 ​​and two second sealing rings 6 are respectively sleeved on the first outer circumferential surface 402 and the second outer circumferential surface 405, the outer ring of the first sealing ring 5 abuts against the inner wall of the first inner cavity 301, and the outer ring of the second sealing ring 6 is used to abut against the inner wall of the installation cavity 901 of the expansion valve 9. The first sealing ring 5 can improve the sealing performance of the connection between the first connecting member 3 and the second connecting member 4, and the second sealing ring 6 can improve the sealing performance of the connection between the second connecting member 4 and the expansion valve 9, thereby preventing refrigerant leakage.

[0044] Furthermore, two first annular grooves 406 and two second annular grooves 407 are respectively formed on the first outer circumferential surface 402 and the second outer circumferential surface 405, and the first sealing ring 5 and the second sealing ring 6 are respectively installed on the first annular groove 406 and the second annular groove 407. The first annular groove 406 and the second annular groove 407 can respectively prevent the first sealing ring 5 and the second sealing ring 6 from falling off.

[0045] Other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 1.

[0046] Example 3

[0047] This embodiment is based on the embodiment 2. Figure 1 , Figure 4 and Figure 5 As shown, the filtering structure also includes a screw (not shown in the figure), and the first connecting member 3 and the second connecting member 4 are respectively provided with a first threaded hole 303 and a second threaded hole 408, and the screw is threadedly connected with the first threaded hole 303 and the second threaded hole 408 at the same time, and a part of the screw extends out of the second connecting member 4 for connecting with the expansion valve 9. The first connecting member 3 and the second connecting member 4 are connected by screws, and the structure of the screws is relatively simple, and installation and disassembly are more convenient. In the use state, the screw passes through the first connecting member 3, the second connecting member 4 and the expansion valve 9 at the same time, so that the three are firmly connected.

[0048] Furthermore, an extension portion 304 is provided on one side of the first connector 3 close to the shoulder 401. The extension portion 304 extends outward from the first connector 3 along the radial direction of the first through cavity 301, that is, extends in a direction away from the axis of the first through cavity 301, and the extension portion 304 abuts against the shoulder 401; the first threaded hole 303 and the second threaded hole 408 are respectively provided on the extension portion 304 and the shoulder 401. It is more convenient to process the first threaded hole 303 and the second threaded hole 408 respectively on the extension portion 304 and the shoulder 401, and the stress can also be concentrated on the extension portion 304 and the shoulder 401, which is conducive to maintaining the integrity and long service life of the first connector 3 and the second connector 4.

[0049] Furthermore, a second limiting portion 305 is protruded from one end of the extension portion 304 near the shoulder portion 401, and a limiting groove 409 is provided on the shoulder portion 401, and the second limiting portion 305 is fitted with the inner wall of the limiting groove 409. Before the screw is passed through the first threaded hole 303 and the second threaded hole 408, the second limiting portion 305 is first embedded in the limiting groove 409, so that the axes of the first threaded hole 303 and the second threaded hole 408 are kept coincident, which facilitates screwing in of the screw.

[0050] The other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 2.

[0051] Example 4

[0052] Combination Figures 1 to 9 The vehicle battery cooling system shown in the figure comprises a compressor 7, a condenser 8, an expansion valve 9, an evaporator 10 and a battery pack assembly 11. The expansion valve 9 is an electronic expansion valve, and a mounting cavity 901 and a threaded blind hole 902 are provided on the expansion valve 9; the evaporator 10 is located in the battery pack assembly 11. The compressor 7, the condenser 8, the expansion valve 9 and the evaporator 10 are connected in sequence through a pipeline 12, and the outlet end of the evaporator 10 is connected to the compressor 7.

[0053] Furthermore, the cooling system also includes a filtering structure of Example 3, specifically, the mounting assembly 1 is located between the condenser 8 and the expansion valve 9, a portion of the pipe 12 is clamped with the first limiting portion 302 of the first connecting member 3 (not shown in the figure), and this portion is located between the first limiting portion 302 and the clamping portion 202 of the filter element 2, and the first through cavity 301 is connected with the pipe 12; the shoulder 401 of the second connecting member 4 abuts against the expansion valve 9, the second outer circumferential surface 405 of the second connecting member 4 fits with the inner wall of the mounting cavity 901 of the expansion valve 9, and the second through cavity 403 is connected with the expansion valve 9; one end of the screw passes through the first threaded hole 303 and the second threaded hole 408 and is threadedly connected with the threaded blind hole 902.

[0054] It should be noted that the compressor 7, condenser 8, expansion valve 9, evaporator 10 and battery pack assembly 11 are all prior art, so their structures will not be described in detail.

[0055] The working principle or workflow of this embodiment is as follows: the compressor 7 sucks in and compresses the low-temperature and low-pressure refrigerant in the evaporator 10, so that the refrigerant is converted into a high-temperature and high-pressure gas; then the high-pressure and high-temperature gaseous refrigerant enters the condenser 8 through the pipeline and is condensed into a liquid, then flows through the filter element 2 for filtration, and then flows into the expansion valve 9 for throttling and expansion to form a mist; the mist refrigerant then enters the evaporator 10 for evaporation, thereby absorbing the heat emitted by the battery pack assembly 11 to achieve a refrigeration effect; the refrigerant evaporated in the evaporator 10 is converted into a low-temperature and low-pressure state again, and finally flows into the compressor 7 for the next round of refrigeration.

[0056] Other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 3.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description, and it is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A filtering structure for a vehicle battery cooling system, characterized in that: The invention comprises a mounting assembly (1) for connecting to a pipeline, wherein the mounting assembly (1) is provided with an inner cavity (101) for communicating with the pipeline, a filter element (2) is provided in the inner cavity (101), and the filter element (2) separates the two ends of the inner cavity (101).

2. The filtering structure of the automotive battery cooling system according to claim 1, characterized in that: The filter element (2) is provided with a plurality of through holes. The filter element (2) arches from one side thereof toward the other side thereof along the axial direction of the inner cavity (101), and forms a receiving groove (201) for receiving debris.

3. The filtering structure of the automotive battery cooling system according to claim 1, characterized in that: The mounting assembly (1) comprises a first connecting member (3) and a second connecting member (4) detachably connected to the first connecting member (3); the inner cavity (101) passes through the first connecting member (3) and the second connecting member (4); at least a portion of the first connecting member (3) is located on one side of the filter element (2) for limiting the movement of the filter element (2) toward the liquid inlet side of the inner cavity (101); and at least a portion of the second connecting member (4) is located on the other side of the filter element (2) for limiting the movement of the filter element (2) toward the liquid outlet side of the inner cavity (101).

4. The filtering structure of the automobile battery cooling system according to claim 3, characterized in that: The outer edge of the filter element (2) is provided with a clamping portion (202); the first connecting element (3) is provided with a first through cavity (301) inside, and a first limiting portion (302) is provided on the inner wall of the first through cavity (301); the second connecting element (4) is provided with a second through cavity (403) inside, the first through cavity (301) and the second through cavity (403) form the inner cavity (101), and one end of the second connecting element (4) is provided with a mounting groove communicating with the second through cavity (403) (404), the clamping portion (202) is located between the first limiting portion (302) and the inner wall of the mounting groove (404), and one side of the clamping portion (202) is in contact with the inner wall of the mounting groove (404); the outside of the second connecting member (4) is provided with a shoulder (401) and a first outer circumferential surface (402); the shoulder (401) is in contact with one end of the first connecting member (3), and the first outer circumferential surface (402) is in contact with the inner wall of the first through cavity (301).

5. The filtering structure of the automobile battery cooling system according to claim 4, characterized in that: The second connecting member (4) is also provided with a second outer circumferential surface (405) on the outside, and the shoulder (401) is located between the first outer circumferential surface (402) and the second outer circumferential surface (405). The side of the shoulder (401) close to the second outer circumferential surface (405) is used to abut against the expansion valve, and the second outer circumferential surface (405) is used to fit against the inner wall of the installation cavity of the expansion valve.

6. The filtering structure of the automotive battery cooling system according to claim 5, characterized in that: A first sealing ring (5) and a second sealing ring (6) are respectively sleeved on the first outer circumferential surface (402) and the second outer circumferential surface (405); the outer ring of the first sealing ring (5) abuts against the inner wall of the first through cavity (301), and the outer ring of the second sealing ring (6) is used to abut against the inner wall of the installation cavity of the expansion valve.

7. The filtering structure of the automobile battery cooling system according to claim 6, characterized in that: The first outer circumferential surface (402) and the second outer circumferential surface (405) are respectively provided with a first annular groove (406) and a second annular groove (407), and the first sealing ring (5) and the second sealing ring (6) are respectively mounted on the first annular groove (406) and the second annular groove (407).

8. The filtering structure of the automotive battery cooling system according to claim 5, characterized in that: It also includes a screw, wherein the first connecting member (3) and the second connecting member (4) are respectively provided with a first threaded hole (303) and a second threaded hole (408), and the screw is threadedly connected to the first threaded hole (303) and the second threaded hole (408) at the same time, and at least a part of the screw is used to connect to the expansion valve.

9. The filtering structure of the automobile battery cooling system according to claim 8, characterized in that: An extension portion (304) is provided on one side of the first connecting member (3) close to the shoulder (401), and the extension portion (304) extends outward from the first connecting member (3) along the radial direction of the first through cavity (301), and the extension portion (304) abuts against the shoulder (401); the first threaded hole (303) and the second threaded hole (408) are respectively arranged on the extension portion (304) and the shoulder (401).

10. The filter structure of the automotive battery cooling system according to claim 9, characterized in that: A second limiting portion (305) protrudes from one end of the extension portion (304) close to the shoulder portion (401), a limiting groove (409) is provided on the shoulder portion (401), and the second limiting portion (305) is in contact with the inner wall of the limiting groove (409).

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