Battery shell pressure resistance test tool

Abstract

This invention discloses a battery casing pressure resistance testing fixture, comprising a central member adapted to the inner cavity of the battery casing, and a first clamping mechanism for clamping the battery casing and the central member by abutting against a first end and a second end opposite to the first end when the central member is assembled into the inner cavity of the battery casing. The first clamping mechanism is further used to seal the first end and the second end of the battery casing when clamping the battery casing and the central member. By employing the above technical solution, this invention can improve the accuracy of the battery casing pressure resistance test.

Description

Technical Field

[0001] This invention relates to the field of tooling and fixture technology, and in particular to a battery casing pressure resistance test tooling. Background Technology

[0002] During battery casing production, a pressure resistance test is required to check whether the battery casing meets strength requirements. During the pressure resistance test, a clamping device is used to hold the battery casing at both the first and second ends to tighten it, while simultaneously sealing any openings in the battery casing at the points where the clamping device is positioned. However, existing pressure resistance testing methods have the following drawbacks:

[0003] 1. In order to ensure the airtightness of the battery casing, the clamping device needs to provide a strong clamping force on the battery casing. The strong clamping force can easily cause the battery casing to deform before it is filled with high-pressure gas, which will affect the accuracy of the test.

[0004] 2. When high-pressure gas enters the battery casing, it will exert strong pressure on the side wall of the battery casing, which can easily cause the side wall of the battery casing to deform and shorten the battery casing. This will result in gaps between the first and second ends of the battery casing and the clamping device, making it impossible to complete the test smoothly and resulting in a low test success rate.

[0005] 3. The clamping force of the clamping device on the battery case is provided by a cylinder. Since high-pressure gas needs to be filled into the battery case during testing, a cylinder with a large diameter must be used to provide a sufficient clamping force to ensure the sealing effect of the battery case. The cylinder has a large diameter, which is not easy to arrange in space. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a battery casing pressure resistance test fixture with high testing accuracy.

[0007] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a battery casing pressure resistance test fixture, including a central component adapted to the inner cavity of the battery casing and a first clamping mechanism for clamping the battery casing and the central component by abutting against a first end and a second end opposite to the first end when the central component is assembled in the inner cavity of the battery casing. The first clamping mechanism is also used to seal the first end and the second end of the battery casing when clamping the battery casing and the central component.

[0008] Furthermore, the first clamping mechanism includes a first abutting mechanism for abutting the first end of the battery housing and for sealing the first end of the battery housing when abutting the first end of the battery housing, and a second abutting mechanism for abutting the second end of the battery housing and for sealing the second end of the battery housing when abutting the second end of the battery housing.

[0009] Furthermore, the first abutment mechanism includes a first bracket, a first sealing mechanism disposed on the first bracket and movable toward or away from the second abutment mechanism, and a first sealing drive mechanism for pushing the first sealing mechanism toward the second abutment mechanism so that the first sealing mechanism abuts against and seals the first end of the battery case; the second abutment mechanism includes a second bracket, a second sealing mechanism disposed on the second bracket and movable toward or away from the first sealing mechanism, and a second sealing drive mechanism for pushing the second sealing mechanism toward the first sealing mechanism so that the second sealing mechanism abuts against and seals the second end of the battery case.

[0010] Furthermore, the first sealing mechanism includes a first sliding member disposed on the first bracket and capable of sliding toward or away from the second sealing mechanism, a first sealing portion formed on the side of the first sliding member facing the second sealing mechanism and used to seal the first end of the battery casing, and a first inclined surface formed on the first sliding member on the side opposite to the side where the first sealing portion is located; the first sealing drive mechanism includes a second sliding member disposed on the first bracket and capable of sliding up and down, a second inclined surface formed on the second sliding member at a position corresponding to the first inclined surface and adapted to the first inclined surface, and a first drive mechanism for driving the second sliding member to rise or fall so that the second inclined surface cooperates with the first inclined surface to push the first sliding member toward the second sealing mechanism. The second sealing mechanism includes a third sliding member disposed on the second bracket and capable of sliding toward or away from the first sealing portion, a second sealing portion formed on the side of the third sliding member facing the first sealing portion and used to seal the second end of the battery case, and a third inclined surface formed on the third sliding member on the other side opposite to the side where the second sealing portion is located; the second sealing driving mechanism includes a fourth sliding member disposed on the second bracket and capable of sliding up and down, a fourth inclined surface formed on the fourth sliding member corresponding to the position of the third inclined surface and adapted to the third inclined surface, and a second driving mechanism for driving the fourth sliding member to rise or fall so that the fourth inclined surface cooperates with the third inclined surface to push the third sliding member toward the first sealing portion.

[0011] Furthermore, the angle between the first inclined plane and the vertical direction is less than 45 degrees; the angle between the third inclined plane and the vertical direction is less than 45 degrees.

[0012] Furthermore, it also includes a second clamping mechanism for clamping the first end of the battery case onto the central member and a third clamping mechanism for clamping the second end of the battery case onto the central member.

[0013] Furthermore, the second clamping mechanism includes a first clamping plate and a second clamping plate symmetrically disposed on two opposite sides of the first end of the battery case, and a first clamping drive mechanism for driving the first clamping plate and the second clamping plate to move towards each other to clamp the first end of the battery case onto the center plate; the third clamping mechanism includes a third clamping plate and a fourth clamping plate symmetrically disposed on two opposite sides of the second end of the battery case, and a second clamping drive mechanism for driving the third clamping plate and the fourth clamping plate to move towards each other to clamp the second end of the battery case onto the center plate.

[0014] Furthermore, the second clamping mechanism also includes a first mounting portion disposed on the first abutment mechanism. The first clamping plate and the second clamping plate are disposed on the first mounting portion and can slide towards or away from each other on the first mounting portion. A fifth inclined surface is formed on the side of the first clamping plate opposite to the second clamping plate, and a sixth inclined surface is formed on the side of the second clamping plate opposite to the first clamping plate in a manner symmetrical to the fifth inclined surface. The first clamping drive mechanism includes a first lifting portion, a first receiving hole perpendicularly penetrating the first lifting portion on the side facing the second abutment mechanism and the side opposite to the second abutment mechanism, and a third drive mechanism for driving the first lifting portion to rise and fall. A seventh inclined surface adapted to the fifth inclined surface is formed on the hole wall of the first receiving hole at the position corresponding to the first clamping plate, and an eighth inclined surface adapted to the sixth inclined surface is formed on the hole wall of the first receiving hole at the position corresponding to the second clamping plate. The third clamping mechanism further includes a second mounting portion disposed on the second abutment mechanism. The third clamping plate and the fourth clamping plate are disposed on the second mounting portion and can slide towards or away from each other on the second mounting portion. A ninth inclined surface is formed on the side of the third clamping plate away from the fourth clamping plate, and a tenth inclined surface is formed on the side of the fourth clamping plate away from the third clamping plate in a manner symmetrical to the ninth inclined surface. The second clamping drive mechanism includes a second lifting portion, a second receiving hole that vertically penetrates the second lifting portion towards the first abutment mechanism and the side away from the first abutment mechanism, and a fourth drive mechanism for driving the second lifting portion to lift. An eleventh inclined surface that matches the ninth inclined surface is formed at the position of the third clamping plate, and a twelfth inclined surface that matches the tenth inclined surface is formed at the position of the fourth clamping plate.

[0015] Furthermore, it also includes a first positioning mechanism disposed on the first abutting mechanism and a second positioning mechanism disposed on the second abutting mechanism. The first positioning mechanism is used to position the first end of the center plate so that the first end of the center plate is aligned with the first sealing part, and the second positioning mechanism is used to position the second end of the center plate so that the second end of the center plate is aligned with the second sealing part.

[0016] Furthermore, the central component includes a central plate, a first positioning groove recessed inward from the end face of the first end of the central plate, and a second positioning groove recessed inward from the end face of the second end of the central plate; the first positioning mechanism includes a first positioning rod disposed on the first bracket at a position corresponding to the first positioning groove and slidable toward or away from the first positioning groove, and a fifth driving mechanism for driving the first positioning rod to slide toward the first positioning groove so that the first positioning rod passes through the first sealing part and enters the first positioning groove, the fifth driving mechanism also being used to drive the first positioning rod to slide away from the first positioning groove so that the first positioning rod is pulled out of the first positioning groove; the second positioning mechanism includes a second positioning rod disposed on the second bracket at a position corresponding to the second positioning groove and slidable toward or away from the second positioning groove, and a sixth driving mechanism for driving the second positioning rod to slide toward the second positioning groove so that the second positioning rod passes through the second sealing part and enters the second positioning groove, the sixth driving mechanism also being used to drive the second positioning rod to slide away from the second positioning groove so that the second positioning rod is pulled out of the second positioning groove.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] When using the battery casing pressure resistance testing fixture described in this invention, the central component is first placed into the inner cavity of the battery casing. Then, the first clamping mechanism abuts against the first end of the battery casing and the second end opposite to the first end to clamp the battery casing and the central component. Simultaneously, the first clamping mechanism seals the first end and the second end of the battery casing, thus sealing the inner cavity of the battery casing. High-pressure gas can then be injected into the battery casing to test whether its pressure resistance meets design requirements. When the first clamping mechanism clamps the battery casing, the central component provides support, preventing the battery casing from being deformed and improving the accuracy of the pressure resistance test. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of a battery casing.

[0021] Figure 2 This is a schematic diagram of the structure of a battery casing pressure resistance testing fixture according to the present invention;

[0022] Figure 3This is a schematic diagram of the structure of a battery casing pressure resistance test fixture of the present invention when the protective mechanism is omitted;

[0023] Figure 4 This is a schematic diagram of the structure of the central component in a battery casing pressure resistance test fixture of the present invention;

[0024] Figure 5 yes Figure 4 AA section view;

[0025] Figure 6 This is a schematic diagram of the first supporting mechanism in a battery casing pressure resistance test fixture of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the first bracket in a battery casing pressure resistance test fixture of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the base plate in a battery casing pressure resistance testing fixture of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the first sealing mechanism in a battery casing pressure resistance test fixture of the present invention, viewed from one perspective.

[0029] Figure 10 This is a schematic diagram of the first sealing mechanism in a battery casing pressure resistance test fixture of the present invention, viewed from another perspective.

[0030] Figure 11 This is a schematic diagram of the structure of the first sealing drive mechanism in a battery casing pressure resistance test fixture of the present invention;

[0031] Figure 12 This is a schematic diagram of the structure of the second supporting mechanism in a battery casing pressure resistance test fixture of the present invention;

[0032] Figure 13 This is a schematic diagram of the structure of the second bracket in a battery casing pressure resistance test fixture of the present invention;

[0033] Figure 14 This is a schematic diagram of the structure of the second sealing mechanism in a battery casing pressure resistance test fixture of the present invention, viewed from one perspective.

[0034] Figure 15 This is a schematic diagram of the second sealing mechanism in a battery casing pressure resistance test fixture of the present invention, viewed from another perspective.

[0035] Figure 16 This is a schematic diagram of the structure of the second sealing drive mechanism in a battery casing pressure resistance test fixture of the present invention;

[0036] Figure 17This is a schematic diagram of the structure of the second clamping mechanism in the battery casing pressure resistance test fixture of the present invention, viewed from a certain perspective.

[0037] Figure 18 This is a schematic diagram of the structure of the second clamping mechanism in the battery casing pressure resistance test fixture of the present invention, viewed from another perspective and with the first vertical plate omitted;

[0038] Figure 19 This is a schematic diagram of the combined structure of the first clamping plate and the second clamping plate in a battery casing pressure resistance test fixture of the present invention;

[0039] Figure 20 This is a schematic diagram of the third clamping mechanism in a battery casing pressure resistance test fixture of the present invention, viewed from one perspective.

[0040] Figure 21 This is a schematic diagram of the third clamping mechanism in a battery casing pressure resistance test fixture of the present invention, viewed from another perspective and with the second vertical plate omitted;

[0041] Figure 22 This is a schematic diagram of the combined structure of the third and fourth clamping plates in a battery casing pressure resistance testing fixture of the present invention.

[0042] Figure 23 This is a schematic diagram of the structure of the first positioning mechanism in a battery casing pressure resistance testing fixture of the present invention;

[0043] Figure 24 This is a schematic diagram of the second positioning mechanism in a battery casing pressure resistance testing fixture of the present invention.

[0044] The meanings of the labels in the attached diagram are as follows:

[0045] Center component-1; First clamping mechanism-2; Second clamping mechanism-3; Third clamping mechanism-4; First positioning mechanism-5; Second positioning mechanism-6; Air passage-7; Protective mechanism-8;

[0046] Center plate-11; First positioning groove-12; Second positioning groove-13; First channel-14; Second channel-15;

[0047] Base plate-21; First supporting mechanism-22; Second supporting mechanism-23; First bracket-221; First sealing mechanism-222; First sealing drive mechanism-223; First connecting part-2211; First column-2212; First horizontal plate-2213; First connecting plate-22111; First strip hole-22112; First screw hole-22113; Third channel-22131; Fourth channel-22132; First air inlet - 22133; First sliding member - 2221; First sealing part - 2222; First inclined surface - 2223; First groove - 22211; First through hole - 22212; Second through hole - 22213; First sealing gasket - 22221; First sealing ring - 22222; Second sealing ring - 22223; Second sliding member - 2231; Second inclined surface - 2232; First drive mechanism - 2233 First guide hole - 22311; Second bracket - 231; Second sealing mechanism - 232; Second sealing drive mechanism - 233; Second connecting part - 2311; Second column - 2312; Second horizontal plate - 2313; Second connecting plate - 23111; Second strip hole - 23112; Second screw hole - 23113; Fifth channel - 23131; Sixth channel - 23132; Second air inlet - 23133; Three sliding parts - 2321; Second sealing part - 2322; Third inclined surface - 2323; Second groove - 23211; Third through hole - 23212; Fourth through hole - 23213; Second sealing gasket - 23221; Third sealing ring - 23222; Fourth sealing ring - 23223; Fourth sliding part - 2331; Fourth inclined surface - 2332; Second drive mechanism - 2333; Second guide hole - 23311;

[0048] First mounting part - 31; First clamping plate - 32; Second clamping plate - 33; First clamping drive mechanism - 34; First mounting ring - 311; First pin - 312; Second positioning pin - 313; Fifth inclined surface - 321; First oblong hole - 322; Sixth inclined surface - 331; Second oblong hole - 332; First vertical plate - 341; First lifting part - 342; First receiving hole - 343; Third drive mechanism - 344; First mounting groove - 3421;

[0049] Second mounting part - 41; Third clamping plate - 42; Fourth clamping plate - 43; Second clamping drive mechanism - 44; Second mounting ring - 411; Third pin - 412; Fourth positioning pin - 413; Ninth inclined surface - 421; Third oblong hole - 422; Tenth inclined surface - 431; Fourth oblong hole - 432; Second vertical plate - 441; Second lifting part - 442; Second receiving hole - 443; Fourth drive mechanism - 444; Second mounting groove - 4421;

[0050] First positioning rod - 51; Fifth drive mechanism - 52;

[0051] Second positioning rod - 61; Sixth drive mechanism - 62;

[0052] Protective plate-81. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0056] To clearly describe the battery casing pressure resistance testing fixture of the present invention, the structure of the battery casing is briefly described first:

[0057] like Figure 1 As shown, a battery case has a first opening through its inner cavity at its first end and a second opening through its inner cavity at its second end.

[0058] like Figure 2 and Figure 3As shown, an embodiment of a battery casing pressure resistance testing fixture of the present invention includes a central component 1, a first clamping mechanism 2, a second clamping mechanism 3, a third clamping mechanism 4, a first positioning mechanism 5, a second positioning mechanism 6, an air passage 7, and a protective mechanism 8. The central component 1 is adapted to the inner cavity of the battery casing. The first clamping mechanism 2 is used to abut against a first end and a second end opposite to the first end of the battery casing when the central component 1 is assembled in the inner cavity of the battery casing to clamp the battery casing and the central component 1. The first clamping mechanism 2 is also used to seal the first end and the second end of the battery casing when clamping the battery casing and the central component 1. The present invention has the advantage of improving the accuracy of the pressure resistance test of the battery casing. When using the battery casing pressure resistance testing fixture of the present invention, the center member 1 is first placed into the inner cavity of the battery casing. Then, the first clamping mechanism 2 abuts against the first end of the battery casing and the second end opposite to the first end to clamp the battery casing and the center member 1. At the same time, the first clamping mechanism 2 seals the first end and the second end of the battery casing to seal the inner cavity of the battery casing. Then, high-pressure gas can be filled into the battery casing to test whether the pressure resistance of the battery casing meets the design requirements. When the first clamping mechanism 2 clamps the battery casing, the center member 1 plays a supporting role and can prevent the battery casing from being deformed. It can be understood that the second clamping mechanism 3, the third clamping mechanism 4, the first positioning mechanism 5, the second positioning mechanism 6, the air passage 7, and the protective mechanism 8 are not necessary structures of the present invention. For example, in some embodiments, the battery casing pressure resistance testing fixture of the present invention may only include the center member 1 and the first clamping mechanism 2.

[0059] like Figure 4 and Figure 5As shown, the center component 1 includes a center plate 11, a first positioning groove 12, a second positioning groove 13, a first channel 14, and a second channel 15. The first positioning groove 12 is recessed inward from the end face of the first end of the center plate 11, and the second positioning groove 13 is recessed inward from the end face of the second end of the center plate 11. The first channel 14 and the second channel 15 are both formed in the center plate 11. The first end and the second end of the first channel 14 respectively penetrate the first end face and the second end face of the center plate 11. The first end of the second channel 15 penetrates the first channel 14, and the second end of the second channel 15 penetrates the surface of the center plate 11, but the second end of the second channel 15 does not penetrate the first end face and the second end face of the center plate 11. It is understood that the first channel 14 can also be configured in other ways within the center plate 11. For example, in some embodiments, the first end of the first channel 14 passes through the first end face of the center plate 11, and the second end of the first channel 14 is located within the center plate 11 and is in a closed state; in other embodiments, the first end of the first channel 14 is located within the center plate 11 and is in a closed state, and the second end of the first channel 14 passes through the second end face of the center plate 11.

[0060] like Figure 2 As shown, the first clamping mechanism 2 includes a base plate 21, a first abutting mechanism 22, and a second abutting mechanism 23. Both the first abutting mechanism 22 and the second abutting mechanism 23 are disposed on the base plate 21. The first abutting mechanism 22 abuts against the first end of the battery casing and also seals the first end of the battery casing when abutting against it. The second abutting mechanism 23 abuts against the second end of the battery casing and also seals the second end of the battery casing when abutting against it. By abutting the first end and the second end of the battery casing respectively through the first abutting mechanism 22 sealing the first end and the second abutting mechanism 23 sealing the second end, the battery casing can be clamped and its inner cavity sealed. It is understood that the base plate 21 is not a necessary structure of the first clamping mechanism 2. For example, in some embodiments, the first abutting mechanism 22 and the second abutting mechanism 23 can be directly installed on another operating table.

[0061] like Figure 6As shown, the first abutment mechanism 22 includes a first bracket 221, a first sealing mechanism 222, and a first sealing drive mechanism 223. The first sealing mechanism 222 is disposed on the first bracket 221. The first sealing mechanism 222 is movable toward or away from the second abutment mechanism 23. The first sealing drive mechanism 223 is used to push the first sealing mechanism 222 toward the second abutment mechanism 23 so that the first sealing mechanism 222 abuts against and seals the first end of the battery case. Moving the first sealing mechanism 222 toward the second abutment mechanism 23 allows it to abut against and seal the first end of the battery case. Moving the first sealing mechanism 222 away from the second abutment mechanism 23 allows it to be released from the first end of the battery case.

[0062] like Figure 7 As shown, the first bracket 221 includes a first connecting part 2211 for connecting to the base plate 21, a first column 2212 disposed on the first connecting part 2211, and a first horizontal plate 2213 disposed on the first column 2212 along the moving direction of the first sealing mechanism 222.

[0063] like Figure 7 and Figure 8As shown, the first connecting portion 2211 includes a first connecting plate 22111, a first strip hole 22112, a first screw hole 22113, and a first bolt (not shown in the figure). There are four first strip holes 22112. It can be understood that in some embodiments, the number of first strip holes 22112 may also be other. The first strip holes 22112 are provided on the first connecting plate 22111, and the first strip holes 22112 penetrate the first connecting plate 22111 vertically. The first strip holes 22112 are arranged parallel to the moving direction of the first sealing mechanism 222. The first screw hole 22113 is formed at the positions corresponding to the two ends of each of the first strip holes 22112 on the base plate 21. A first bolt is screwed into each of the first screw holes 22113. The screw-in end of the first bolt passes through the corresponding first strip hole 22112 and is screwed into the corresponding first screw hole 22113. Tighten the corresponding first bolts in each of the first screw holes 22113 so that the bolt heads of the first bolts press against the upper side of the first connecting plate 22111, thereby fixing the first connecting plate 22111 to the base plate 21, and thus fixing the first bracket 221 to the base plate 21. It is understood that the first connecting part 2211 is not limited to the structure described above. For example, in some embodiments, the two first screw holes 22113 corresponding to each of the first strip holes 22112 can also be located between the two ends of the first strip hole 22112, that is, the distance between the sidewalls of the two first screw holes 22113 that are far apart from each other is less than the length of the first strip hole 22112. The corresponding first bolt is screwed into each of the first screw holes 22113, and the bolt head of the first bolt is pressed against the upper side of the first connecting plate 22111. In this way, the first connecting plate 22111 can also be fixed on the base plate 21. The first bolt is rotated in each of the first screw holes 22113, so that the bolt head of the first bolt is disengaged from the upper side of the first connecting plate 22111. At this time, the first connecting frame can be moved toward or away from the second abutment mechanism 23 on the base plate 21 to adjust the distance between the first abutment mechanism 22 and the second abutment mechanism 23, so that the battery shell pressure-resistant tooling of the present invention can be applied to the clamping and sealing of shells of different lengths within a certain range, and has a wide range of applications. For example, in some other embodiments, the number of first screw holes 22113 formed on the base plate 21 at positions corresponding to each of the first strip holes 22112 may be other.

[0064] The first horizontal plate 2213 has a third channel 22131, a fourth channel 22132, and a first air inlet 22133. The third channel 22131 is formed in the first horizontal plate 2213 at a position corresponding to the first positioning groove 12. The third channel 22131 is arranged along the moving direction of the first sealing mechanism 222. The third channel 22131 penetrates the two opposite end faces of the first horizontal plate 2213, that is, it penetrates the end face of the first horizontal plate 2213 facing the second abutment mechanism 23 and the end face of the first horizontal plate 2213 away from the second abutment mechanism 23. One end of the fourth channel 22132 is connected to the position of the end face of the first horizontal plate 2213 facing the second abutment mechanism 23 corresponding to the first channel 14. One end of the first air inlet 22133 is connected to the fourth channel 22132, and the other end of the first air inlet 22133 penetrates the outer surface of the first horizontal plate 2213.

[0065] like Figure 9 As shown, the first sealing mechanism 222 includes a first sliding member 2221, a first sealing portion 2222, and a first inclined surface 2223. The first sliding member 2221 is disposed on the first bracket 221. Specifically, the first sliding member 2221 is disposed on the first horizontal plate 2213. The first sliding member 2221 can slide toward or away from the second abutment mechanism 23. The first sealing portion 2222 is formed on the side of the first sliding member 2221 facing the second abutment mechanism 23. The first sealing portion 2222 is used to seal the first end of the battery case. The first inclined surface 2223 is formed on the side of the first sliding member 2221 opposite to the side where the first sealing portion 2222 is located. The angle between the first inclined surface 2223 and the vertical direction is less than 45 degrees. It can be understood that in other embodiments, the angle between the first inclined surface 2223 and the vertical direction can also be greater than or equal to 45 degrees.

[0066] like Figure 9 and Figure 10As shown, a first groove 22211 adapted to the first horizontal plate 2213 is formed by recessing the first sliding member 2221 inward from the first inclined surface 2223. The first groove 22211 is slidably fitted on the first horizontal plate 2213 so that the first sliding member 2221 can slide toward or away from the second abutment mechanism 23 on the first horizontal plate 2213, that is, the first sliding member 2221 can slide toward or away from the second abutment mechanism 23 on the first bracket 221. A first through hole 22212 is formed on the first sliding member 2221 at the position corresponding to the first positioning groove 12. One end of the first through hole 22212 passes through the end face of the first sliding member 2221 facing the first sealing part 2222, and the other end of the first through hole 22212 connects to the first groove 22211. A second through hole 22213 is formed on the first sliding member 2221 at the position corresponding to the first channel 14. One end of the second through hole 22213 passes through the end face of the first sliding member 2221 facing the first sealing part 2222, and the other end of the second through hole 22213 connects to the first groove 22211. It can be understood that the first sliding member 2221 is not limited to the above-described sliding connection with the first horizontal plate 2213. For example, in some embodiments, a slide rail can be provided on the first horizontal plate 2213, and a slide groove that slides on the slide rail can be provided on the first sliding member 2221 at the position corresponding to the slide rail. This structure also allows the first sliding member 2221 to slide on the first horizontal plate 2213.

[0067] The first sealing portion 2222 includes a first sealing gasket 22221 disposed on the side of the first sliding member 2221 facing the second abutment mechanism 23 at the first end position of the battery casing, a first sealing ring 22222 disposed on the side of the first sliding member 2221 facing the second abutment mechanism 23 and surrounding the first through hole, and a second sealing ring 22223 disposed on the side of the first sliding member 2221 facing the second abutment mechanism 23 and surrounding the second through hole. A first through hole is formed on the first sealing gasket 22221, and the first sealing ring 22222 and the second sealing ring 22223 are both located in the first through hole.

[0068] like Figure 11As shown, the first sealing drive mechanism 223 includes a second sliding member 2231, a second inclined surface 2232, and a first drive mechanism 2233. The second sliding member 2231 is disposed on the first bracket 221, specifically on the first horizontal plate 2213. The second sliding member 2231 can slide up and down on the first bracket 221, that is, the second sliding member 2231 can slide up and down on the first horizontal plate 2213. The second inclined surface 2232 is formed on the second sliding member 2231 corresponding to the first inclined surface. At position 2223, the second inclined surface 2232 is adapted to the first inclined surface 2223. The first driving mechanism 2233 is disposed on the first bracket 221. Specifically, the first driving mechanism 2233 is disposed on the first column 2212. The first driving mechanism 2233 is a cylinder, a hydraulic cylinder or a push rod motor. The first driving mechanism 2233 is used to drive the second sliding member 2231 to rise or fall so that the second inclined surface 2232 cooperates with the first inclined surface 2223 to push the first sliding member 2221 toward the second abutment mechanism 23. The first slider 2221 and the second slider 2231 form a wedge-shaped inclined plane mechanism. Since the angle between the first inclined plane 2223 and the vertical direction is less than 45 degrees, the angle between the second inclined plane 2232 and the vertical direction is also less than 45 degrees. During the process of the first driving mechanism 2233 pushing the first slider 2221 toward the second abutting mechanism 23 through the second slider 2231, the thrust on the first slider 2221 toward the second abutting mechanism 23 is greater than the driving force provided by the first driving mechanism 2233 to the second slider 2231. Compared to the method of using the output shaft of the first drive mechanism 2233 to push the first sliding member 2221 directly in the direction of the second abutment mechanism 23, the battery casing pressure resistance test fixture of the present invention can meet the thrust requirement of the first sliding member 2221 by using the first drive mechanism 2233 with a smaller driving force, that is, the thrust requirement of the first sliding member 2221 can be met by using the first drive mechanism 2233 with a smaller cylinder diameter, so that the first drive mechanism 2233 is easier to arrange in space.

[0069] The second sliding member 2231 is provided with a first guide hole 22311. One end of the first guide hole 22311 passes through the side of the second sliding member 2231 facing the second abutment mechanism 23, and the other end of the first guide hole 22311 passes through the side of the second sliding member 2231 away from the second abutment mechanism 23. The thickness of the first guide hole 22311 is adapted to the thickness of the first horizontal plate 2213. The distance between the upper and lower sidewalls of the first guide hole 22311 is greater than the distance between the upper and lower sidewalls of the first horizontal plate 2213. With this structure, the second sliding member 2231 can slide up and down on the first horizontal plate 2213. It can be understood that the connection between the second sliding member 2231 and the first horizontal plate 2213 is not limited to the above-mentioned sliding connection. For example, in some embodiments, a slide rail can be provided vertically on the first horizontal plate 2213, and a slide groove that slides on the slide rail can be provided on the second sliding member 2231. With this structure, the second sliding member 2231 can also slide up and down on the first horizontal plate 2213.

[0070] like Figure 12 As shown, the second abutment mechanism 23 includes a second bracket 231, a second sealing mechanism 232, and a second sealing drive mechanism 233. The second sealing mechanism 232 is mounted on the second bracket 231 and is movable toward or away from the first sealing mechanism 222. The second sealing drive mechanism 233 is used to push the second sealing mechanism 232 toward the first sealing mechanism 222 so that the second sealing mechanism 232 abuts against and seals the second end of the battery casing. Moving the second sealing mechanism 232 toward the first sealing mechanism 222 allows it to abut against and seal the second end of the battery casing, while moving the second sealing mechanism 232 away from the first sealing mechanism 222 allows it to be released from the second end of the battery casing. The first sliding member 2221 is slidable toward or away from the second sealing mechanism 232. The first sealing portion 2222 is formed on the side of the first sliding member 2221 facing the second sealing mechanism 232. The first driving mechanism 2233 is used to drive the second sliding member 2231 to rise or fall so that the second inclined surface 2232 cooperates with the first inclined surface 2223 to push the first sliding member 2221 toward the second sealing mechanism 232.

[0071] like Figure 13 As shown, the second bracket 231 includes a second connecting part 2311 for connecting with the base plate 21, a second column 2312 disposed on the second connecting part 2311, and a second horizontal plate 2313 disposed on the second column 2312 along the moving direction of the second sealing mechanism 232.

[0072] like Figure 8 and Figure 13 As shown, the second connecting part 2311 includes a second connecting plate 23111, a second strip hole 23112, a second screw hole 23113, and a second bolt. There are four second strip holes 23112. It can be understood that in some embodiments, the number of second strip holes 23112 may also be other. The second strip holes 23112 are provided on the second connecting plate 23111. The second strip holes 23112 vertically penetrate the second connecting plate 23111. The second strip holes 23112 are arranged along the moving direction parallel to the second sealing mechanism 232. Two second screw holes 23113 are formed at positions corresponding to each of the second strip holes 23112 on the base plate 21. The distance between the mutually distant sidewalls of the two second screw holes 23113 is less than the length of the second strip hole 23112. A second bolt is screwed into each of the second screw holes 23113. The screw-in end of the second bolt passes through the corresponding second strip hole 23112 and is screwed into the corresponding second screw hole 23113. Tighten the corresponding second bolts in each of the second screw holes 23113, so that the bolt heads of the second bolts press against the upper side of the second connecting plate 23111, thereby fixing the second connecting plate 23111 onto the base plate 21, and further fixing the second bracket 231 onto the base plate 21. Rotate the second bolts in each of the second screw holes 23113, so that the bolt heads of the second bolts disengage from the upper side of the second connecting plate 23111. At this time, the second connecting bracket can be moved on the base plate 21 toward or away from the first sealing mechanism 222 to adjust the distance between the second abutment mechanism 23 and the first abutment mechanism 22, so that the battery casing pressure-resistant fixture of the present invention can be applied to the clamping and sealing of casings of different lengths within a certain range, and has a wide range of applications. It is understood that the second connecting portion 2311 is not limited to the structure described above. For example, in some embodiments, the distance between the mutually distant sidewalls of the two second screw holes 23113 corresponding to each second strip hole 23112 can also be the same as the length of the second strip hole 23112. The corresponding second bolt is screwed into each second screw hole 23113, and the bolt head of the second bolt is pressed against the upper side surface of the second connecting plate 23111, thereby fixing the second connecting plate 23111 to the base plate 21. Furthermore, in other embodiments, the number of second screw holes 23113 formed on the base plate 21 at the positions corresponding to each second strip hole 23112 can also be other numbers.

[0073] The second horizontal plate 2313 has a fifth channel 23131, a sixth channel 23132, and a second air inlet 23133. The fifth channel 23131 is formed within the second horizontal plate 2313 at a position corresponding to the second positioning groove 13. The fifth channel 23131 is arranged along the moving direction of the second sealing mechanism 232 and penetrates the two opposite end faces of the second horizontal plate 2313, that is, it penetrates the end face of the second horizontal plate 2313 facing the first sealing mechanism 222 and the end face of the second horizontal plate 2313 facing away from the first sealing mechanism 222. One end of the sixth channel 23132 is connected to the position of the end face of the second horizontal plate 2313 facing the first sealing mechanism 222, corresponding to the first channel 14. One end of the second air inlet 23133 is connected to the sixth channel 23132, and the other end of the second air inlet 23133 penetrates the outer surface of the second horizontal plate 2313.

[0074] like Figure 14 As shown, the second sealing mechanism 232 includes a third sliding member 2321, a second sealing portion 2322, and a third inclined surface 2323. The third sliding member is disposed on the second bracket 231. Specifically, the third sliding member 2321 is disposed on the second horizontal plate 2313. The third sliding member 2321 can slide toward or away from the first sealing mechanism 222. Specifically, the third sliding member 2321 can slide toward or away from the first sealing portion 2222. The second sealing portion 2322 is formed on the side of the third sliding member 2321 facing the first sealing portion. The second sealing portion 2322 is used to seal the second end of the battery case. The third inclined surface 2323 is formed on the side of the third sliding member 2321 opposite to the side where the second sealing portion 2322 is located. The angle between the third inclined surface 2323 and the vertical direction is less than 45 degrees. It can be understood that in other embodiments, the angle between the third inclined surface 2323 and the vertical direction can also be greater than or equal to 45 degrees.

[0075] like Figure 14 and Figure 15As shown, the third sliding member 2321 has a second groove 23211 that is adapted to the second horizontal plate 2313, which is recessed inward from the third inclined surface 2323. The second groove 23211 is slidably fitted on the second horizontal plate 2313 so that the third sliding member 2321 can slide toward or away from the first sealing mechanism 222 on the second horizontal plate 2313, that is, the third sliding member 2321 can slide toward or away from the first sealing mechanism 222 on the second bracket 231. A third through hole 23212 is formed on the third sliding member 2321 at the position corresponding to the second positioning groove 13. One end of the third through hole 23212 passes through the end face of the second sliding member 2231 facing the second sealing part 2322, and the other end of the third through hole 23212 is connected to the second groove 23211. A fourth through hole 23213 is formed on the second sliding member 2231 at the position corresponding to the first channel 14. One end of the fourth through hole 23213 passes through the end face of the second sliding member 2231 facing the second sealing part 2322, and the other end of the fourth through hole 23213 is connected to the second groove 23211. It is understood that the third sliding member 2321 is not limited to the above-described sliding connection with the second horizontal plate 2313. For example, in some embodiments, a slide rail can be provided on the second horizontal plate 2313, and a slide groove that slides on the slide rail can be provided on the third sliding member 2321 at the position corresponding to the slide rail. This structure also enables the third sliding member 2321 to slide on the second horizontal plate 2313.

[0076] The second sealing portion 2322 includes a second sealing gasket 23221 disposed on the side of the third sliding member 2321 facing the first sealing mechanism 222 at the second end position of the battery casing, a third sealing ring 23222 disposed on the side of the third sliding member 2321 facing the first sealing mechanism 222 and surrounding the third through hole, and a fourth sealing ring 23223 disposed on the side of the third sliding member 2321 facing the first sealing mechanism 222 and surrounding the fourth through hole. A second through hole is formed on the second sealing gasket 23221, and the third sealing ring 23222 and the fourth sealing ring 23223 are both located in the second through hole. When the second sealing mechanism 232 abuts against the second end of the battery case, the second sealing gasket 23221, the third sealing ring 23222, and the fourth sealing ring 23223 all abut against the second end of the battery case. The second sealing gasket 23221 seals the second end of the battery case. The third sealing ring 23222 can reduce the high-pressure gas entering the third through hole from the inner cavity of the battery case. The fourth sealing ring 23223 can reduce the high-pressure gas leaking from between the fourth through hole and the first channel 14 to the position of the second through hole.

[0077] like Figure 16As shown, the second sealing drive mechanism 233 includes a fourth sliding member 2331, a fourth inclined surface 2332, and a second drive mechanism 2333. The fourth sliding member 2331 is disposed on the second bracket 231, specifically on the second horizontal plate 2313. The fourth sliding member 2331 can slide up and down on the second bracket 231, that is, the fourth sliding member 2331 can slide up and down on the second horizontal plate 2313. The fourth inclined surface 2332 is formed on the fourth sliding member 2331, corresponding to the third inclined surface. At position 2323, the fourth inclined surface 2332 is adapted to the third inclined surface 2323. The second driving mechanism 2333 is provided on the second bracket 231. Specifically, the second driving mechanism 2333 is provided on the second column 2312. The second driving mechanism 2333 is a cylinder, a hydraulic cylinder, or a push rod motor. The second driving mechanism 2333 is used to drive the fourth sliding member 2331 to rise or fall so that the fourth inclined surface 2332 and the third inclined surface 2323 cooperate to push the third sliding member 2321 toward the first sealing part 2222. The third sliding member 2321 and the fourth sliding member 2331 form a wedge-shaped inclined plane mechanism. Since the angle between the third inclined plane 2323 and the vertical direction is less than 45 degrees, correspondingly, the angle between the fourth inclined plane 2332 and the vertical direction is also less than 45 degrees. During the process of the second driving mechanism 2333 pushing the third sliding member 2321 toward the first sealing mechanism 222 through the fourth sliding member 2331, the thrust on the third sliding member 2321 toward the first sealing mechanism 222 is greater than the driving force provided by the second driving mechanism 2333 to the fourth sliding member 2331. Compared to the method of using the output shaft of the second drive mechanism 2333 to directly push the third sliding member 2321 in the direction of the first sealing mechanism 222, the battery casing pressure resistance test fixture of the present invention can meet the thrust requirement of the third sliding member 2321 by using the second drive mechanism 2333 with a smaller driving force. That is, the thrust requirement of the third sliding member 2321 can be met by using the second drive mechanism 2333 with a smaller cylinder diameter, so that the second drive mechanism 2333 is easier to arrange in space.

[0078] The fourth sliding member 2331 is provided with a second guide hole 23311. One end of the second guide hole 23311 passes through the side of the fourth sliding member 2331 facing the first sealing mechanism 222, and the other end of the second guide hole 23311 passes through the side of the fourth sliding member 2331 away from the first sealing mechanism 222. The thickness of the second guide hole 23311 is adapted to the thickness of the second horizontal plate 2313, and the distance between the upper and lower sidewalls of the second guide hole 23311 is greater than the distance between the upper and lower sidewalls of the second horizontal plate 2313. This structure allows the fourth sliding member 2331 to slide up and down on the second horizontal plate 2313. It can be understood that the connection between the fourth sliding member 2331 and the second horizontal plate 2313 is not limited to the above-mentioned sliding connection. For example, in some embodiments, a slide rail can be provided vertically on the second horizontal plate 2313, and a slide groove that slides on the slide rail can be provided on the fourth sliding member 2331. This structure also allows the fourth sliding member 2331 to slide up and down on the second horizontal plate 2313.

[0079] The second clamping mechanism 3 is used to clamp the first end of the battery case onto the center member 1, specifically onto the center plate 11. When the first sealing mechanism 222 abuts against the first end of the battery case and the side wall of the battery case is deformed by pressure, the first end of the battery case is less likely to shrink toward the second end of the battery case, making it less likely that a gap will appear between the first end of the battery case and the first sealing gasket 22221, and making it easier to ensure the sealing performance between the first end of the battery case and the first sealing gasket 22221.

[0080] like Figure 17As shown, the second clamping mechanism 3 includes a first mounting portion 31, a first clamping plate 32, a second clamping plate 33, and a first clamping drive mechanism 34. The first mounting portion 31 is disposed on the first abutment mechanism 22. Specifically, the first mounting portion 31 is disposed on the first sliding member 2221 and allows the first sliding member 2221 to slide within it. The first clamping plate 32 and the second clamping plate 33 are disposed on the first mounting portion 31 and can slide towards or away from each other on the first mounting portion 31. The first clamping plate 32 and the second clamping plate 33 are symmetrically disposed on two opposite sides of the first end of the battery case. The first clamping drive mechanism 34 is used to drive the first clamping plate 32 and the second clamping plate 33 to move towards each other to clamp the first end of the battery case onto the center plate 11. The first clamping drive mechanism 34 drives the first clamping plate 32 and the second clamping plate 33 to slide towards each other on the first mounting portion 31, thereby clamping the first end of the battery case onto the center plate 11. It is understood that the first mounting part 31 is not limited to being disposed on the first sliding member 2221. For example, in some embodiments, the first mounting part 31 may also be fixedly connected to the first connecting plate 22111 by a connector. In addition, the second clamping mechanism 3 is not limited to the structure described above. For example, in some embodiments, the second clamping mechanism 3 may only include a first clamping plate 32, a second clamping plate 33, and a first clamping drive mechanism 34. The first clamping drive mechanism 34 directly drives the first clamping plate 32 and the second clamping plate 33 to move towards each other and clamp the first end of the battery case onto the center plate 11.

[0081] like Figure 18 As shown, the first mounting part 31 includes a first mounting ring 311 encircling the first sliding member 2221, two first pins 312 arranged vertically on the first mounting ring 311 corresponding to the position of the first clamping plate 32, and two second positioning pins 313 arranged vertically on the first mounting ring 311 corresponding to the position of the second clamping plate 33. The annular hole of the first mounting ring 311 is adapted to the first sliding member 2221, thereby realizing the mounting of the first mounting part 31 on the first sliding member 2221. The first sliding member 2221 can slide towards or away from the second sealing mechanism 232 within the first mounting ring 311. Under the restriction of the first sliding member 2221, the first mounting ring 311 cannot move up and down, and the first mounting ring 311 does not affect the sliding of the first sliding member 2221 on the first horizontal plate 2213 in the direction towards or away from the second sealing mechanism 232. It can be understood that in other embodiments, the first positioning pins and the second positioning pins 313 may be two or more other quantities.

[0082] like Figure 19 As shown, a fifth inclined surface 321 is formed on the side of the first clamping plate 32 opposite to the second clamping plate 33. A first oblong hole 322, adapted to each first positioning pin, is formed on the first clamping plate 32 at each corresponding position of the first positioning pin. The length of the first oblong hole 322 is along the moving direction of the first clamping plate 32, and the width of the first oblong hole 322 is adapted to the diameter of the first positioning pin. Under the cooperation of the first oblong hole 322 and the corresponding first positioning pin, the first clamping plate 32 cannot move up or down, but can move towards or away from the second clamping plate 33. The angle between the fifth inclined surface 321 and the vertical direction is less than 45 degrees. It can be understood that in other embodiments, the angle between the fifth inclined surface 321 and the vertical direction can be greater than or equal to 45 degrees.

[0083] The second clamping plate 33 has a sixth inclined surface 331 formed symmetrically with the fifth inclined surface 321 on the side opposite to the first clamping plate 32. A second oblong hole 332, corresponding to the position of each second positioning pin 313, is formed on the second clamping plate 33, adapting to the second positioning pin 313. The length direction of the second oblong hole 332 is along the moving direction of the second clamping plate 33, and the width of the second oblong hole 332 is adapted to the diameter of the second positioning pin 313. Under the cooperation of the second oblong hole 332 and the corresponding second positioning pin 313, the second clamping plate 33 cannot move up and down, but can move towards or away from the first clamping plate 32. The angle between the sixth inclined surface 331 and the vertical direction is less than 45 degrees. It can be understood that in other embodiments, the angle between the sixth inclined surface 331 and the vertical direction can be greater than or equal to 45 degrees.

[0084] like Figure 17As shown, the first clamping drive mechanism 34 includes a first vertical plate 341, a first lifting part 342, a first receiving hole 343, and a third drive mechanism 344. The first vertical plate 341 is disposed on the first connecting plate 22111 at a position corresponding to the first end of the battery case. The first receiving hole 343 vertically penetrates the side of the first lifting part 342 facing the second abutment mechanism 23 and the side away from the second abutment mechanism 23. The third drive mechanism 344 is a cylinder, hydraulic cylinder, or push rod motor. The third drive mechanism 344 is disposed on the first vertical plate 341 and is used to drive the first lifting part 342 to rise and fall. The hole wall of the first receiving hole 343 is formed with a seventh inclined surface adapted to the fifth inclined surface 321 at a position corresponding to the first clamping plate 32. The hole wall of the first receiving hole 343 is formed with an eighth inclined surface adapted to the sixth inclined surface 331 at a position corresponding to the second clamping plate 33. During the process of the third driving mechanism 344 driving the first lifting part 342 to rise or fall, the seventh inclined surface can cooperate with the fifth inclined surface 321 to push the first clamping plate 32 towards the second clamping plate 33, and the eighth inclined surface can cooperate with the sixth inclined surface 331 to push the second clamping plate 33 towards the first clamping plate 32. The first clamping plate 32 and the second clamping plate 33 can then move towards each other and clamp the first end of the battery casing onto the central plate 11. The first clamping plate 32 and the second clamping plate 33 can clamp the first end of the battery casing using only the third driving mechanism 344, resulting in a simple structure and convenient placement of the third driving mechanism 344. It is understood that in some embodiments, the third driving mechanism 344 can also be directly mounted on the first connecting plate 22111.

[0085] like Figure 18 As shown, the first lifting part 342 is recessed inward on the side facing the second sealing mechanism 232 to form a first mounting groove 3421. The upper end of the first mounting groove 3421 passes through the upper end surface of the first lifting part 342, and the lower end of the first mounting groove 3421 is lower than the upper side surface of the first vertical plate 341. The two vertical sidewalls of the first mounting groove 3421 are symmetrically arranged on both sides of the first receiving hole 343.

[0086] The third clamping mechanism 4 is used to clamp the second end of the battery case onto the center member 1, specifically onto the center plate 11. When the second sealing mechanism 232 abuts against the second end of the battery case and the side wall of the battery case is deformed by pressure, the second end of the battery case is less likely to retract towards the first end of the battery case, thus preventing gaps from forming between the second end of the battery case and the second sealing gasket 23221. The gap makes it easier to ensure the sealing between the second end of the battery case and the second sealing gasket 23221. After the first end and the second end of the battery case are both clamped on the center plate 11, the first end and the second end of the battery case are both supported by the center plate 11. When the side wall of the battery case is deformed by pressure, the first end and the second end of the battery case are not easy to shrink toward the middle of the battery case, which makes it easier to ensure the sealing of the battery case and improves the success rate of the pressure resistance test.

[0087] like Figure 20 As shown, the third clamping mechanism 4 includes a second mounting portion 41, a third clamping plate 42, a fourth clamping plate 43, and a second clamping drive mechanism 44. The second mounting portion 41 is disposed on the second abutment mechanism 23. Specifically, the second mounting portion 41 is disposed on the third sliding member 2321 and allows the third sliding member 2321 to slide within it. The third clamping plate 42 and the fourth clamping plate 43 are disposed on the second mounting portion 41 and can slide towards or away from each other on the second mounting portion 41. The third clamping plate 42 and the fourth clamping plate 43 are symmetrically disposed on two opposite sides of the second end of the battery case. The second clamping drive mechanism 44 is used to drive the third clamping plate 42 and the fourth clamping plate 43 to move towards each other to clamp the second end of the battery case onto the center plate 11. The second clamping drive mechanism 44 drives the third clamping plate 42 and the fourth clamping plate 43 to slide towards each other on the second mounting portion 41, thereby clamping the second end of the battery case onto the center plate 11. It is understood that the second mounting part 41 is not limited to being disposed on the second sliding member 2231. For example, in some embodiments, the second mounting part 41 may also be fixedly connected to the second connecting plate 23111 by a connector. In addition, the third clamping mechanism 4 is not limited to the structure described above. For example, in some embodiments, the third clamping mechanism 4 may only include a third clamping plate 42, a fourth clamping plate 43, and a second clamping drive mechanism 44. The second clamping drive mechanism 44 directly drives the third clamping plate 42 and the fourth clamping plate 43 to move towards each other and clamp the second end of the battery case onto the center plate 11.

[0088] like Figure 21 As shown, the second mounting part 41 includes a second mounting ring 411 encircling the second sliding member 2231, two third pins 412 arranged vertically on the second mounting ring 411 corresponding to the position of the third clamping plate 42, and two fourth positioning pins 413 arranged vertically on the second mounting ring 411 corresponding to the position of the fourth clamping plate 43. The annular hole of the second mounting ring 411 is adapted to the third sliding member 2321, thereby realizing the mounting of the second mounting part 41 on the third sliding member 2321. The third sliding member 2321 can slide towards or away from the first sealing mechanism 222 within the second mounting ring 411. Under the restriction of the third sliding member 2321, the second mounting ring 411 cannot move up and down, and the second mounting ring 411 does not affect the sliding of the third sliding member 2321 on the second horizontal plate 2313 in the direction towards or away from the first sealing mechanism 222. It can be understood that in other embodiments, the third positioning pins and the fourth positioning pins 413 may be two or more other quantities.

[0089] like Figure 22 As shown, a ninth inclined surface 421 is formed on the side of the third clamping plate 42 opposite to the fourth clamping plate 43. A third oblong hole 422, adapted to each third positioning pin, is formed on the third clamping plate 42 at each corresponding position of the third positioning pin. The length direction of the third oblong hole 422 is along the moving direction of the third clamping plate 42, and the width of the third oblong hole 422 is adapted to the diameter of the third positioning pin. Under the cooperation of the third oblong hole 422 and the corresponding third positioning pin, the third clamping plate 42 cannot move up or down, but can move towards or away from the fourth clamping plate 43. The angle between the ninth inclined surface 421 and the vertical direction is less than 45 degrees. It can be understood that in other embodiments, the angle between the ninth inclined surface 421 and the vertical direction can be greater than or equal to 45 degrees.

[0090] The fourth clamping plate 43 has a tenth inclined surface 431 formed symmetrically with the ninth inclined surface 421 on the side opposite to the third clamping plate 42. A fourth oblong hole 432, corresponding to the position of each fourth positioning pin 413, is formed on the fourth clamping plate 43, adapting to the fourth positioning pin 413. The length direction of the fourth oblong hole 432 is along the moving direction of the fourth clamping plate 43, and the width of the fourth oblong hole 432 is adapted to the diameter of the fourth positioning pin 413. Under the cooperation of the fourth oblong hole 432 and the corresponding fourth positioning pin 413, the fourth clamping plate 43 cannot move up and down, but can move towards or away from the third clamping plate 42. The angle between the tenth inclined surface 431 and the vertical direction is less than 45 degrees. It can be understood that in other embodiments, the angle between the tenth oblong surface 431 and the vertical direction can be greater than or equal to 45 degrees.

[0091] like Figure 20 As shown, the second clamping drive mechanism 44 includes a second vertical plate 441, a second lifting part 442, a second receiving hole 443, and a fourth drive mechanism 444. The second vertical plate 441 is disposed on the second connecting plate 23111 at the second end position corresponding to the battery case. The second receiving hole 443 vertically penetrates the side of the second lifting part 442 facing the first abutting mechanism 22 and the side away from the first abutting mechanism 22. The fourth drive mechanism 444 is a cylinder, hydraulic cylinder, or push rod motor. The fourth drive mechanism 444 is disposed on the second vertical plate 441 and is used to drive the second lifting part 442 to rise and fall. The hole wall of the second receiving hole 443 is formed with an eleventh inclined surface adapted to the ninth inclined surface 421 at the position corresponding to the third clamping plate 42. The hole wall of the second receiving hole 443 is formed with a twelfth inclined surface adapted to the tenth inclined surface 431 at the position corresponding to the fourth clamping plate 43. During the process of the second lifting part 442 being raised or lowered by the fourth driving mechanism 444, the eleventh inclined surface can cooperate with the ninth inclined surface 421 to push the third clamping plate 42 towards the fourth clamping plate 43, and the twelfth inclined surface can cooperate with the tenth inclined surface 431 to push the fourth clamping plate 43 towards the third clamping plate 42. The third clamping plate 42 and the fourth clamping plate 43 can then move towards each other and clamp the second end of the battery casing onto the central plate 11. The fourth driving mechanism 444 alone can clamp the second end of the battery casing onto the third clamping plate 42 and the fourth clamping plate 43, resulting in a simple structure and convenient placement of the fourth driving mechanism 444. It is understood that in some embodiments, the fourth driving mechanism 444 can also be directly mounted on the second connecting plate 23111.

[0092] like Figure 21As shown, the second lifting part 442 is recessed inward on the side facing the first sealing mechanism 222 to form a second mounting groove 4421. The upper end of the second mounting groove 4421 passes through the upper end surface of the second lifting part 442, and the lower end of the second mounting groove 4421 is lower than the upper side surface of the second vertical plate 441. The two vertical sidewalls of the second mounting groove 4421 are symmetrically arranged on both sides of the second receiving hole 443.

[0093] like Figure 23 As shown, the first positioning mechanism 5 is disposed on the first abutting mechanism 22. The first positioning mechanism 5 is used to position the first end of the center plate 11 so that the first end of the center plate 11 is aligned with the first sealing part 2222. The first positioning mechanism 5 includes a first positioning rod 51 and a fifth driving mechanism 52. The first positioning rod 51 is disposed on the first bracket 221 at a position corresponding to the first positioning groove 12. Specifically, the first positioning rod 51 is located in the third channel 22131. The end of the first positioning rod 51 facing away from the second sealing mechanism 232 protrudes from the end face of the first horizontal plate 2213 facing away from the second sealing mechanism 232. The first positioning rod 51 is adapted to the third channel 22131 so that the first positioning rod 51 can slide toward or away from the first positioning groove 12. The fifth driving mechanism 52 is a cylinder, a hydraulic cylinder, or a push rod motor. The fifth driving mechanism 52 is used to drive the first positioning rod 51 to slide toward the first positioning groove 12 so that the first positioning rod 51 passes through the first sealing part 2222 and enters the first positioning groove 12. Specifically, the first positioning rod 51 passes through the first through hole 22212 and enters the first positioning groove 12. The fifth driving mechanism 52 is also used to drive the first positioning rod 51 to slide away from the first positioning groove 12 so that the first positioning rod 51 is pulled out of the first positioning groove 12.

[0094] like Figure 24As shown, the second positioning mechanism 6 is disposed on the second abutment mechanism 23. The second positioning mechanism 6 is used to position the second end of the center plate 11 so that the second end of the center plate 11 is aligned with the second sealing part 2322. The second positioning mechanism 6 includes a second positioning rod 61 and a sixth driving mechanism 62. The second positioning rod 61 is disposed on the second bracket 231 at a position corresponding to the second positioning groove 13. Specifically, the second positioning rod 61 is located in the fifth channel 23131. The end of the second positioning rod 61 facing away from the first sealing mechanism 222 protrudes from the end face of the second horizontal plate 2313 facing away from the first sealing mechanism 222. The second positioning rod 61 is adapted to the fifth channel 23131 so that the second positioning rod 61 can slide toward or away from the second positioning groove 13. The sixth driving mechanism 62 is a cylinder, a hydraulic cylinder, or a push rod motor. The sixth driving mechanism 62 is used to drive the second positioning rod 61 to slide toward the second positioning groove 13 so that the second positioning rod 61 passes through the second sealing part 2322 and enters the second positioning groove 13. Specifically, the second positioning rod 61 passes through the third through hole 23212 and enters the second positioning groove 13. The sixth driving mechanism 62 is also used to drive the second positioning rod 61 to slide away from the second positioning groove 13 so that the second positioning rod 61 is pulled out of the second positioning groove 13. After the center plate 11 is assembled into the battery case, the battery case with the center plate 11 is placed between the first sealing mechanism 222 and the second sealing mechanism 232. The fifth driving mechanism 52 drives the first positioning rod 51 to slide toward the first positioning groove 12 so that the first positioning rod 51 passes through the first through hole 22212 and enters the first positioning groove 12. The sixth driving mechanism 62 drives the second positioning rod 61 to slide toward the second positioning groove 13 so that the second positioning rod 61 passes through the third through hole 23212 and enters the second positioning groove 13. The first positioning rod 51 and the second positioning rod 61 clamp the center plate 11 in the middle to lock it. At this time, the first end of the battery case is aligned with the first sealing part 2222, specifically, the first end of the battery case is aligned with the first sealing gasket 22221, and the second end of the battery case is aligned with the second sealing part, specifically, the second end of the battery case is aligned with the second sealing gasket 23221.The first positioning mechanism 5 and the second positioning mechanism 6 are provided to facilitate aligning the first end of the battery case with the first sealing gasket 22221 and the second end of the battery case with the second sealing gasket 23221 before the first abutting mechanism 22 and the second abutting mechanism 23 clamp the battery case. This ensures that the first sealing mechanism 222 and the second sealing mechanism 232 can smoothly seal the first end and the second end of the battery case.

[0095] The gas passage 7 is composed of the first air inlet 22133, the fourth channel 22132, the second through hole 22213, the first channel 14, the second channel 15, the fourth through hole 23213, the sixth channel 23132, and the second air inlet 23133. When it is necessary to fill the battery casing with high-pressure gas through the gas passage 7, the second air inlet 23133 can be blocked, and high-pressure gas can be filled into the first air inlet 22133. The high-pressure gas enters the gap between the battery casing and the center plate 11 through the fourth channel 22132, the second through hole 22213, the first channel 14, and the second channel 15 in sequence to apply pressure to the side wall of the battery casing. Alternatively, the first air inlet 22133 can be blocked, and high-pressure gas can be injected into the second air inlet 23133. The high-pressure gas enters the gap between the battery casing and the center plate 11 through the sixth channel 23132, the fourth through hole 23213, the first channel 14, and the second channel 15 in sequence. High-pressure gas can be injected into the gap between the battery casing and the center plate 11 through both the first air inlet 22133 and the second air inlet 23133, which is very convenient to use. The air passage is not limited to the structure described above. For example, in some embodiments, the air passage 7 can also be an air inlet hole directly drilled on the side wall of the battery casing. The inflation pipe of the inflation device can be directly connected to the air inlet hole to inflate the inner cavity of the battery casing.

[0096] like Figure 1As shown, the protective mechanism 8 includes two protective plates 81. After the first sealing mechanism 222 and the second sealing mechanism 232 respectively abut against the first end and the second end of the battery casing, one end of each of the two protective plates 81 is inserted from the upper end of the first lifting part 342 into the first mounting groove 3421, and the other end of each of the two protective plates 81 is inserted from the upper end of the second lifting part 442 into the second mounting groove 4421. When the protective plates 81 are inserted into the first mounting groove 3421 and the second mounting groove 4421, the two protective plates 81 are respectively located on both sides of the battery casing. After the protective plates 81 are inserted into the first mounting groove 3421 and the second mounting groove 4421, the two ends of the protective plates 81 are respectively supported on the first vertical plate 341 and the second vertical plate 441. The protective plate 81 can block both sides of the battery casing, reducing the possibility of the battery casing exploding and causing injury during pressurization, thus improving the safety of the battery casing pressure resistance testing fixture of the present invention. It is understood that the protective mechanism 8 is not limited to the structure described above. For example, in some embodiments, the protective mechanism 8 can also be a protective cover including two side plates and a top plate connected between the upper ends of the two side plates. Placing the protective cover over the battery casing before pressurization can also achieve a protective effect.

[0097] The above embodiments merely illustrate preferred implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A battery casing withstand voltage testing fixture, characterized in that: The battery housing includes a central member adapted to the inner cavity of the battery housing and a first clamping mechanism for clamping the battery housing and the central member by abutting against a first end and a second end opposite to the first end when the central member is assembled in the inner cavity of the battery housing. The first clamping mechanism is also used to seal the first end and the second end of the battery housing when clamping the battery housing and the central member. The first clamping mechanism includes a first abutting mechanism for abutting the first end of the battery case and for sealing the first end of the battery case when abutting the first end of the battery case, and a second abutting mechanism for abutting the second end of the battery case and for sealing the second end of the battery case when abutting the second end of the battery case. The first abutment mechanism includes a first bracket, a first sealing mechanism disposed on the first bracket and movable toward or away from the second abutment mechanism, and a first sealing drive mechanism for pushing the first sealing mechanism toward the second abutment mechanism so that the first sealing mechanism abuts against and seals the first end of the battery case; The first sealing mechanism includes a first sliding member disposed on the first bracket and capable of sliding toward or away from the second sealing mechanism, a first sealing portion formed on the side of the first sliding member facing the second sealing mechanism and used to seal the first end of the battery case, and a first inclined surface formed on the first sliding member on the other side opposite to the side where the first sealing portion is located; the first sealing drive mechanism includes a second sliding member disposed on the first bracket and capable of sliding up and down, a second inclined surface formed on the second sliding member at a position corresponding to the first inclined surface and adapted to the first inclined surface, and a first drive mechanism for driving the second sliding member to rise or fall so that the second inclined surface cooperates with the first inclined surface to push the first sliding member toward the second sealing mechanism.

2. The battery casing withstand voltage testing fixture as described in claim 1, characterized in that: The second abutment mechanism includes a second bracket, a second sealing mechanism disposed on the second bracket and movable toward or away from the first sealing mechanism, and a second sealing drive mechanism for pushing the second sealing mechanism toward the first sealing mechanism so that the second sealing mechanism abuts against and seals the second end of the battery case.

3. The battery casing withstand voltage testing fixture as described in claim 2, characterized in that: The second sealing mechanism includes a third sliding member disposed on the second bracket and capable of sliding toward or away from the first sealing portion, a second sealing portion formed on the side of the third sliding member facing the first sealing portion and used to seal the second end of the battery case, and a third inclined surface formed on the third sliding member on the other side opposite to the side where the second sealing portion is located; the second sealing drive mechanism includes a fourth sliding member disposed on the second bracket and capable of sliding up and down, a fourth inclined surface formed on the fourth sliding member at a position corresponding to the third inclined surface and adapted to the third inclined surface, and a second drive mechanism for driving the fourth sliding member to rise or fall so that the fourth inclined surface cooperates with the third inclined surface to push the third sliding member toward the first sealing portion.

4. The battery casing withstand voltage testing fixture as described in claim 3, characterized in that: The angle between the first inclined plane and the vertical direction is less than 45 degrees; the angle between the third inclined plane and the vertical direction is less than 45 degrees.

5. The battery casing withstand voltage testing fixture as described in claim 1, characterized in that: It also includes a second clamping mechanism for clamping the first end of the battery case onto the central member and a third clamping mechanism for clamping the second end of the battery case onto the central member.

6. The battery casing withstand voltage testing fixture as described in claim 5, characterized in that: The second clamping mechanism includes a first clamping plate and a second clamping plate symmetrically disposed on two opposite sides of the first end of the battery case, and a first clamping drive mechanism for driving the first clamping plate and the second clamping plate to move toward each other to clamp the first end of the battery case onto the center plate; the third clamping mechanism includes a third clamping plate and a fourth clamping plate symmetrically disposed on two opposite sides of the second end of the battery case, and a second clamping drive mechanism for driving the third clamping plate and the fourth clamping plate to move toward each other to clamp the second end of the battery case onto the center plate.

7. The battery casing withstand voltage testing fixture as described in claim 6, characterized in that: The second clamping mechanism further includes a first mounting portion disposed on the first abutment mechanism. The first clamping plate and the second clamping plate are disposed on the first mounting portion and can slide towards or away from each other on the first mounting portion. A fifth inclined surface is formed on the side of the first clamping plate opposite to the second clamping plate, and a sixth inclined surface is formed on the side of the second clamping plate opposite to the first clamping plate in a manner symmetrical to the fifth inclined surface. The first clamping drive mechanism includes a first lifting portion, a first receiving hole perpendicularly penetrating the first lifting portion on the side facing the second abutment mechanism and the side opposite to the second abutment mechanism, and a third drive mechanism for driving the first lifting portion to rise and fall. A seventh inclined surface adapted to the fifth inclined surface is formed on the hole wall of the first receiving hole at the position corresponding to the first clamping plate, and an eighth inclined surface adapted to the sixth inclined surface is formed on the hole wall of the first receiving hole at the position corresponding to the second clamping plate. The third clamping mechanism further includes a second mounting portion disposed on the second abutment mechanism. The third clamping plate and the fourth clamping plate are disposed on the second mounting portion and can slide towards or away from each other on the second mounting portion. A ninth inclined surface is formed on the side of the third clamping plate away from the fourth clamping plate, and a tenth inclined surface is formed on the side of the fourth clamping plate away from the third clamping plate in a manner symmetrical to the ninth inclined surface. The second clamping drive mechanism includes a second lifting portion, a second receiving hole that vertically penetrates the second lifting portion towards the first abutment mechanism and the side away from the first abutment mechanism, and a fourth drive mechanism for driving the second lifting portion to lift. An eleventh inclined surface that matches the ninth inclined surface is formed at the position of the third clamping plate, and a twelfth inclined surface that matches the tenth inclined surface is formed at the position of the fourth clamping plate.

8. The battery casing withstand voltage testing fixture as described in claim 1, characterized in that: It also includes a first positioning mechanism disposed on the first abutting mechanism and a second positioning mechanism disposed on the second abutting mechanism. The first positioning mechanism is used to position the first end of the center plate so that the first end of the center plate is aligned with the first sealing part, and the second positioning mechanism is used to position the second end of the center plate so that the second end of the center plate is aligned with the second sealing part.

9. The battery casing withstand voltage testing fixture as described in claim 8, characterized in that: The central component includes a central plate, a first positioning groove recessed inward from the first end face of the central plate, and a second positioning groove recessed inward from the second end face of the central plate. The first positioning mechanism includes a first positioning rod disposed on the first bracket at a position corresponding to the first positioning groove and slidable toward or away from the first positioning groove, and a fifth driving mechanism for driving the first positioning rod to slide toward the first positioning groove so that the first positioning rod passes through the first sealing part and enters the first positioning groove. The fifth driving mechanism is also used to drive the first positioning rod to slide away from the first positioning groove so that the first positioning rod is pulled out of the first positioning groove. The second positioning mechanism includes a second positioning rod disposed on the second bracket at a position corresponding to the second positioning groove and slidable toward or away from the second positioning groove, and a sixth driving mechanism for driving the second positioning rod to slide toward the second positioning groove so that the second positioning rod passes through the second sealing part and enters the second positioning groove. The sixth driving mechanism is also used to drive the second positioning rod to slide away from the second positioning groove so that the second positioning rod is pulled out of the second positioning groove.

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