Battery shell clamping leakage detection clamp and device

Abstract

The utility model, which belongs to the technical field of the battery test, discloses a battery shell clamping leakage detection clamp and device comprising a base body and a cover body. The base body is used for supporting a battery shell, a first positioning assembly and a second positioning assembly are arranged on the base body, the first positioning assembly or the second positioning assembly is provided with an air inlet hole communicated with the interior of the battery shell, the first positioning assembly is used for abutting against and positioning the battery shell in the first direction, and the second positioning assembly is used for abutting against and positioning the battery shell in the second direction. The second positioning assembly is used for abutting against and positioning the battery shell in a second direction; and the cover body and the base body are used for abutting against and positioning the battery shell in a third direction. The battery shell clamping and leakage detecting clamp and device provided by the utility model are convenient to operate, simple in structure and wide in compatibility, and can test the sealing performance and the pressure endurance capability of battery shells of different models, so that the performance, the service life and the safety of batteries are guaranteed, and meanwhile, the one-time yield is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a battery shell clamping leakage detection fixture and a device. Background Art

[0002] As a key component of electric vehicles, the safety performance of batteries is very important. The battery shell is composed of a battery shell and a battery cover plate welded together. It is a key component for sealing and protecting the battery cells. The sealing and pressure resistance of the battery shell directly affect the safety performance of the battery. Taking square aluminum shell batteries as an example, square aluminum shell batteries will weld the battery shell and the battery cover plate during the assembly process. At present, most of them are full welded after pre-welding. During the full welding process, there will be defects such as explosion points, sand holes, pores and loose welding. The more obvious defects can be inspected by the naked eye or with the help of a microscope, while sand holes, pores, loose welding, etc. cannot be detected. If the defective batteries are not detected and continue to be assembled, the subsequent process will cause poor packaging and poor battery cycle performance. In severe cases, it will cause electrolyte overflow and battery explosion, which poses a serious safety hazard. Therefore, it is very necessary to test the battery shell for leakage and pressure resistance.

[0003] In the prior art, for example, a Chinese patent with publication number CN 217211267 U discloses a battery shell air tightness test fixture and test device, including: a base, a pressure plate, a limit column and an inflatable component; the base is used to place the battery shell; the pressure plate is in contact with the battery shell, and the pressure plate is located on the side of the battery shell away from the base; the limit column is arranged between the pressure plate and the base, and limits the pressing height between the pressure plate and the base; the inflatable component is fixed on the base, and the air outlet of the inflatable component is connected to the injection hole of the battery shell. The above-mentioned battery shell air tightness test fixture effectively prevents the pressure plate from pressing the battery shell with excessive force and damaging the appearance of the battery shell, reduces the damage rate of the battery shell during the test, and thus reduces the cost of battery shell testing. However, this solution cannot perform welding pressure resistance and air tightness tests on battery shells of different thicknesses, widths, and heights, and has poor compatibility. Although the prior art also discloses a detection device that is compatible with battery shells of different specifications and models, it is also necessary to repeatedly adjust the position of the inflatable component or the injection hole in order to align the injection hole, resulting in a complex structure and cumbersome operation.

[0004] Therefore, it is particularly important to design a battery shell clamping leak detection tool that is easy to operate, simple in structure, and compatible with battery shells of different specifications and models. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a battery housing clamping leak test fixture and device, which is intended to solve the problems of poor compatibility, cumbersome operation and complex structure of the existing battery housing airtightness test fixture. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A battery shell clamping leak detection fixture comprises a base and a cover; the base is used to support the battery shell, and a first positioning component and a second positioning component are provided on the base, the first positioning component or the second positioning component is provided with an air inlet hole connected to the interior of the battery shell, the first positioning component is used to abut and position the battery shell in a first direction, and the second positioning component is used to abut and position the battery shell in a second direction; the cover and the base are used to abut and position the battery shell in a third direction.

[0007] Furthermore, the first positioning assembly includes a positioning platform and a first positioning member, the air inlet is arranged on the positioning platform, the positioning platform and the first positioning member are respectively arranged on both sides of the battery housing in the first direction, and the first positioning member is adjustably connected to the base.

[0008] Furthermore, it also includes a driving component, which is in driving connection with the first positioning member and is used to drive the first positioning member to move along the first direction.

[0009] Furthermore, the drive assembly includes a screw rod, and a screw rod support frame is provided on the base, and the screw rod support frame is used to support the screw rod; the output end of the screw rod is transmission connected to the first positioning member, and the screw rod can drive the first positioning member to move along the first direction so that the first positioning member abuts against the battery housing.

[0010] Furthermore, the second positioning assembly includes at least two second positioning members, and the at least two second positioning members are respectively arranged on both sides of the battery housing in the second direction, and the second positioning members are adjustably connected to the base.

[0011] Furthermore, one of the second positioning member and the base is provided with a threaded positioning hole, and the other is provided with a countersunk hole extending along the second direction, a bolt connects the countersunk hole and the threaded positioning hole, and the bolt and the countersunk hole can move relative to each other along the second direction.

[0012] Furthermore, the base is provided with a first threaded hole, the cover body is provided with a second threaded hole corresponding to the first threaded hole, the first threaded hole and the second threaded hole are connected by a long bolt, and the long bolt is used to adjust the distance between the base and the cover body in the third direction; or, in the first direction or the second direction, one side of the cover body is movably connected to the base by a hinge, and the other side of the cover body is movably connected to the base by a fastener, and the cover body or the base is provided with an adjustment block, and the adjustment block is detachably connected to the hinge or the fastener, for adjusting the distance between the base and the cover body in the third direction.

[0013] Furthermore, the cover body is provided with a handle, and the handle is used to move the cover body closer to or away from the base body.

[0014] Furthermore, a sealing ring is embedded in a side of the positioning platform close to the battery housing, and the sealing ring is used to seal the injection hole and the explosion-proof valve on the battery housing.

[0015] A battery shell clamping leak testing device comprises the above-mentioned battery shell clamping leak testing fixture; the inflation component is provided with an air outlet, the air outlet is connected to the air inlet, and the inflation component is used to introduce gas into the battery shell.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model designs a battery shell clamping leak detection fixture and device, which can test the sealing and pressure resistance of the battery shell by inflating the air pressure, improve the accuracy of product detection, discover product defects in advance, and improve product safety and product performance.

[0018] 2. The battery shell clamping leak detection fixture and device provided by the utility model are easy to operate, simple in structure, and widely compatible. They can test the sealing and pressure resistance of battery shells of different models, thereby ensuring the battery performance, service life and safety, and improving the first-time yield rate. Moreover, the battery shell is clamped during the test, and the test data is more accurate.

[0019] 3. The utility model provides a battery shell clamping leak detection fixture and device, which locates the installation position of the battery shell through the air inlet hole on the positioning table and fixes the battery shell from three directions. Therefore, the position of the injection hole on the battery shell is relatively fixed. It only needs to connect the air inlet of the inflation component and the air inlet hole on the positioning table to align the injection hole. It is easy to operate and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a battery housing clamping leak detection fixture and device provided in the second embodiment of the utility model at a first viewing angle;

[0021] Figure 2 It is a schematic diagram of a battery housing clamping leak detection fixture and device provided in the second embodiment of the utility model at a second viewing angle;

[0022] Figure 3 This is a schematic diagram of the internal structure of a battery housing clamping leak detection fixture and the device provided in the second embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of a battery housing clamping leak detection fixture and device provided in Embodiment 3 of the present utility model at a first viewing angle;

[0024] Figure 5 It is a schematic diagram of a battery housing clamping leak detection fixture and device provided in the third embodiment of the utility model at a second viewing angle;

[0025] Figure 6 It is a structural schematic diagram of a positioning platform provided in an embodiment of the utility model;

[0026] In the accompanying drawings: 10-base, 11-positioning platform, 111-air inlet, 112-sealing ring, 12-first positioning piece, 13-second positioning piece, 14-driving assembly, 141-screw, 142-screw support frame, 143-rocker, 15-long screw, 16-hinge, 171-clamp, 172-lock, 18-adjusting block, 19-handle, 20-cover, 30-boosting valve. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0028] Embodiment 1:

[0029] See attached Figures 1 to 6 This embodiment provides a battery housing clamping leak detection fixture, such as Figure 1 As shown, it includes a base 10 and a cover 20. The base 10 can be used to place and support the battery shell. The base 10 is provided with a first positioning component and a second positioning component. The first positioning component or the second positioning component is provided with an air inlet hole 111 connected to the inside of the battery shell, and the air inlet hole 111 is a through hole. The first positioning component is used to abut and position the battery shell in a first direction, and the second positioning component is used to abut and position the battery shell in a second direction. The cover 20 is provided on the side of the battery shell away from the base 10, and the cover 20 and the base 10 are used to abut and position the battery shell in a third direction. The first direction, the second direction and the third direction are as shown in FIG. Figure 1 As shown, in this embodiment, the x direction is represented as the first direction, the y direction is represented as the second direction, and the z direction is represented as the third direction. After the battery shell is placed on the base 10, the liquid injection hole and the air inlet 111 on the battery shell are aligned, and then the position of the battery shell is fixed by the first positioning assembly, the second positioning assembly and the cover body 20. The position of the first positioning assembly, the second positioning assembly and the cover body 20 relative to the base 10 is adjustable to achieve fixed clamping of battery shells of different specifications and models. After the battery shell to be tested is fixed by the battery shell clamping leak detection device, it is only necessary to align the external inflation device with the air inlet 111, and then align it with the liquid injection hole on the battery shell, so as to facilitate the inflation and pressurization of the battery shell through the liquid injection hole to test the air tightness of the battery shell.

[0030] Embodiment 2:

[0031] See attached Figures 1 to 3 . On the basis of the first embodiment, in this embodiment, the first positioning assembly includes a positioning platform 11 and a first positioning member 12, the positioning platform 11 and the first positioning member 12 are respectively arranged on both sides of the battery shell in the first direction, the air inlet 111 is arranged on the positioning platform 11, the positioning platform 11 is an L-shaped structure, one side of the L-shaped positioning platform 11 is provided with a threaded hole, which is threadedly connected to the base 10, so as to achieve the fixation of the positioning platform 11. Of course, the position of the positioning platform 11 on the base 10 can also be adjusted according to the position of the injection hole of the battery shell. Specifically, an array of holes can be opened on the base 10, corresponding to the threaded holes on the positioning platform 11; the other side of the L-shaped positioning platform 11 is provided with an air inlet 111 for introducing gas into the battery shell. The second positioning assembly includes at least two second positioning members 13, at least two second positioning members 13 are respectively arranged on both sides of the battery shell in the second direction. Preferably, the second positioning assembly includes two second positioning members 13. The first positioning member 12 , the second positioning member 13 , and the cover body 20 are respectively and adjustably connected to the base body 10 , thereby achieving fixed clamping of battery housings of different specifications and models.

[0032] In this embodiment, the first positioning member 12 is adjustably connected to the base 10. Preferably, the positioning platform 11 is fixedly arranged on the base 10, and the first positioning member 12 is slidably arranged on the base 10. Among them, the positioning platform 11 is fixedly arranged on the base 10, and the injection hole of the battery shell is aligned with the air inlet hole 111 on the positioning platform 11. The positioning platform 11 can be used for both the installation and positioning of the battery shell and the abutment and limiting of one side of the battery shell. The first positioning member 12 is slidably arranged on the base 10, so the arrangement of the first positioning member 12 and the positioning platform 11 can be adapted to battery shells of different heights. The first positioning member 12 is connected to a driving assembly 14, and the driving assembly 14 is used to drive the first positioning member 12 to move along the first direction. The driving assembly can be an electric driving device or a manual driving rod.

[0033] In this embodiment, specifically, Figure 3As shown, the drive assembly 14 includes a screw 141, and a screw support frame 142 is provided on the base 10. The screw support frame 142 can be fixedly connected to the base 10, and the screw support frame 142 is used to support the screw 141. The output end of the screw 141 is transmission-connected to the first positioning member 12, and the screw 141 can drive the first positioning member 12 to move in the first direction so that the first positioning member 12 abuts against the battery housing. When the screw 141 rotates under the action of an external force, the screw 141 moves in the first direction relative to the screw support frame 142, thereby driving the first positioning member 12 connected thereto to also move in the first direction. A guide rod structure can also be provided on both sides of the screw 141 along the second direction, and the guide rod structure can both guide the screw 141 and increase support. For example, the guide rod structure may include a guide rod and a guide rod support seat, the guide rod support frame may be integrally formed with the screw rod support frame 142, the guide rod may be arranged in parallel with the screw rod 141, one end of the guide rod is fixedly connected to the first positioning member 12, and the guide rod may move relative to the guide rod support seat in a first direction. In the first direction, when the injection hole on the battery housing and the air inlet hole 111 on the positioning platform 11 are aligned, the battery housing is fixed in the first direction by rotating the screw rod 141 until the first positioning member 12 and the battery housing abut against one side away from the positioning platform 11. When it needs to be loosened, the screw rod 141 can be rotated in the opposite direction. A rocker 143 may also be provided on the screw rod 141 to facilitate the operation of the screw rod 141.

[0034] In this embodiment, the second positioning member 13 is adjustably connected to the base 10, that is, the second positioning member 13 is adjustable relative to the base 10 to adapt to battery housings of different widths. In a possible implementation, a threaded positioning hole is provided on the base 10, and a countersunk hole is provided on the second positioning member 13. The countersunk hole and the threaded positioning hole are connected by bolts, and the setting positions of the countersunk hole and the threaded positioning hole are interchangeable. At the same time, the countersunk hole extends along the second direction and has a long length, so that the second positioning member 13 is fixedly connected to the base 10, but the two can also be adjusted along the second direction.

[0035] In this embodiment, the cover 20 and the base 10 are adjustable, that is, the distance between the cover 20 and the base 10 is adjustable, so as to adapt to battery casings of different thicknesses. The connection between the cover 20 and the base 10 can be realized in various forms. One possible implementation is as follows: Figure 1 and Figure 2 As shown, a first threaded hole is provided on the base 10, and a second threaded hole corresponding to the first threaded hole is provided on the cover 20. The first threaded hole and the second threaded hole are connected by a long bolt, and the long bolt can be used to adjust the distance between the base 10 and the cover 20 in the third direction.

[0036] Embodiment three:

[0037] See attached Figures 4 to 6On the basis of the second embodiment, the cover 20 and the base 10 are adjustably connected, and a second implementation method can also be adopted. Specifically, in the first direction or the second direction, one side of the cover 20 is movably connected to the base 10 through the hinge 16, and the other side of the cover 20 is movably connected to the base 10 through the buckle 171. It can be understood that this embodiment does not limit the setting position of the hinge 16 and the buckle 171. The hinge 16 and the buckle 171 can be set on the cover 20 or on the base 10. The buckle 171 can cooperate with the lock 172 to realize the buckle connection. When replacing the battery shell, especially the battery shells of the same batch, it is only necessary to loosen the buckle 171 and the lock 172, and open one side of the cover 20 through the hinge 16, which is convenient to operate.

[0038] An adjustment block 18 is provided on the cover 20 or the base 10, and the adjustment block 18 is detachably connected to the hinge 16 or the buckle 171, and is used to adjust the distance between the base 10 and the cover 20 in the third direction. It can be understood that, similarly, this embodiment does not limit the setting position of the adjustment block 18. For example, the lock 172 is fixedly provided on the base 10, and the buckle 171 is provided on the cover 20. When the adjustment block 18 is provided on the base 10, it can be fixed with the buckle 171, and when the adjustment block 18 is provided on the cover 20, it can be fixed with the lock 172. Among them, the adjustment block 18 is fixedly provided on the cover 20 or the base 10, but can also be adjusted in the third direction relative to the cover 20 or the base 10. Specifically, one of the adjustment block 18 and the base body 10 or the cover body 20 is provided with a threaded hole, and the other is provided with a countersunk hole extending along a third direction and having a longer length. Bolts connect the threaded hole and the countersunk hole, so that the adjustment block 18 is fixedly connected to the base body 10 or the cover body 20, but the two can also be adjusted along the third direction.

[0039] In this embodiment, a handle 19 may be further provided on the cover body 20 , and the handle 19 facilitates the cover body 20 to be moved closer to or away from the base body 10 .

[0040] In this embodiment, if Figure 6 As shown, a sealing ring 112 is embedded on one side of the positioning platform 11 close to the injection hole. Specifically, a groove is opened on one side of the L-shaped positioning platform 11 close to the battery shell. The shape of the groove can correspond to the shape of the cover plate of the battery shell, and can also only cover the injection hole or cover the injection hole and the explosion-proof valve. The sealing ring 112 is embedded in the edge of the groove to seal the injection hole and the explosion-proof valve of the battery shell.

[0041] Embodiment 4:

[0042] See attached Figures 1 to 6. On the basis of the third embodiment, the utility model further discloses a battery shell clamping leak detection device, including an inflation component and a battery shell clamping leak detection fixture, the battery shell clamping leak detection fixture is used to clamp and fix the battery shell, and the inflation component introduces gas into the battery shell through the injection hole on the battery shell, and the gas can be compressed gas, nitrogen, helium and other non-toxic gases. The battery shell clamping leak detection device provided in this embodiment can test the position of the welding around the battery shell by inflating and pressurizing the battery shell, thereby testing the sealing and pressure resistance of the battery shell, and improving the accuracy of product detection.

[0043] Specifically, the inflation assembly includes an air source, a boost valve 30 and a pressure detection component. The boost valve 30 is a standard component. The boost valve 30 can be fixed on the upper surface of the cover body 20 or other positions. The boost valve 30 is provided with an air inlet and an air outlet. The air inlet is connected to the air source, and the air outlet is connected to the air inlet 111 on the positioning platform 11. The boost valve 30 can stabilize the pressure of the air outlet and can adjust the pressure of the air outlet. At the same time, pressure detection components are installed at the air inlet and the air outlet to observe subtle changes in pressure. The pressure detection component can be a precision pressure gauge. Among them, the air inlet 111 can be connected to the air outlet of the boost valve 30 through an air line, and the air source can also be connected to the air inlet of the boost valve 30 through an air line.

[0044] The detection process is as follows:

[0045] Place the welded battery shell horizontally on the base 10, so that the injection hole of the battery shell and the air inlet 111 of the positioning platform 11 are well connected; then adjust the first positioning member 12, the second positioning member 13 and the cover 20 according to the size of the battery shell to fix the battery shell in three directions. Adjust the outlet pressure of the boost valve 30. Under the action of the boost valve 30, the gas flows from the outlet of the boost valve 30 into the air inlet 111 of the positioning platform 11, and then enters the battery shell cavity through the injection hole. After the air pressure in the battery shell cavity is balanced, close the external air intake of the boost valve 30 to maintain the pressure. Observe the outlet pressure of the boost valve 30. If there are sand holes or air holes in the battery shell, the outlet pressure of the boost valve 30 will continue to decrease; if there are no battery shell defects in the battery shell, the pressure resistance of the battery cover can also be detected by adjusting the outlet pressure of the boost valve 30 to the pressure test value.

[0046] It can be understood that the battery case clamping leak detection device of any embodiment of the present application can also be placed in a water tank. In addition to observing the pressure at the outlet of the boost valve 30, it is also possible to visually observe whether there are defects in the battery case and determine the specific location of the leak by checking whether there are bubbles in the battery case in the water tank.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0049] In the description of the present invention, "plurality" means two or more.

[0050] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0051] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery housing clamping leak detection fixture, characterized in that: The invention comprises a base (10) and a cover (20); the base (10) is used to support a battery shell, a first positioning component and a second positioning component are provided on the base (10), the first positioning component or the second positioning component is provided with an air inlet (111) connected to the interior of the battery shell, the first positioning component is used to abut and position the battery shell in a first direction, and the second positioning component is used to abut and position the battery shell in a second direction; the cover (20) and the base (10) are used to abut and position the battery shell in a third direction.

2. A battery housing clamping leak detection fixture according to claim 1, characterized in that: The first positioning assembly comprises a positioning platform (11) and a first positioning member (12); the air inlet (111) is arranged on the positioning platform (11); the positioning platform (11) and the first positioning member (12) are respectively arranged on two sides of the battery housing in the first direction; and the first positioning member (12) is adjustably connected to the base (10).

3. A battery housing clamping leak detection fixture according to claim 2, characterized in that: It also comprises a driving assembly (14), wherein the driving assembly (14) is in driving connection with the first positioning member (12) and is used to drive the first positioning member (12) to move along the first direction.

4. A battery housing clamping leak detection fixture according to claim 3, characterized in that: The drive assembly (14) comprises a screw rod (141), and a screw rod support frame (142) is provided on the base body (10), and the screw rod support frame (142) is used to support the screw rod (141); the output end of the screw rod (141) is transmission-connected to the first positioning member (12), and the screw rod (141) can drive the first positioning member (12) to move along the first direction, so that the first positioning member (12) abuts against the battery housing.

5. A battery housing clamping leak detection fixture according to claim 1, characterized in that: The second positioning assembly comprises at least two second positioning members (13), the at least two second positioning members (13) being respectively arranged on both sides of the battery housing in the second direction, and the second positioning members (13) being adjustably connected to the base (10).

6. A battery housing clamping leak detection fixture according to claim 5, characterized in that: One of the second positioning member (13) and the base (10) is provided with a threaded positioning hole, and the other is provided with a countersunk hole extending along the second direction; a bolt connects the countersunk hole and the threaded positioning hole, and the bolt and the countersunk hole can move relative to each other along the second direction.

7. A battery housing clamping leak detection fixture according to claim 1, characterized in that: The base (10) is provided with a first threaded hole, the cover (20) is provided with a second threaded hole corresponding to the first threaded hole, a long bolt connects the first threaded hole and the second threaded hole, and the long bolt is used to adjust the distance between the base (10) and the cover (20) in the third direction; or, in the first direction or the second direction, one side of the cover (20) is movably connected to the base (10) through a hinge (16), and the other side of the cover (20) is movably connected to the base (10) through a snap-fit ​​member (171), and an adjustment block (18) is provided on the cover (20) or the base (10), and the adjustment block (18) is detachably connected to the hinge (16) or the snap-fit ​​member (171) and is used to adjust the distance between the base (10) and the cover (20) in the third direction.

8. A battery housing clamping leak detection fixture according to claim 1, characterized in that: The cover body (20) is provided with a handle (19), and the handle (19) is used to move the cover body (20) closer to or away from the base body (10).

9. A battery housing clamping leak detection fixture according to claim 2, characterized in that: A sealing ring (112) is embedded in a side of the positioning platform (11) close to the battery housing, and the sealing ring (112) is used to seal the injection hole and the explosion-proof valve on the battery housing.

10. A battery housing clamping leak detection device, characterized in that: It comprises an inflation component and a battery shell clamping leak detection fixture as described in any one of claims 1 to 9; the inflation component is provided with an air outlet, the air outlet is connected to the air inlet (111), and the inflation component is used to introduce gas into the battery shell.

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