Cylindrical battery clamp and acupuncture experiment machine

Abstract

The utility model provides a cylindrical battery clamp and an acupuncture experiment machine, and the cylindrical battery clamp comprises a mounting seat assembly; the first clamping assembly comprises a first sliding block and a second sliding block, the first sliding block and the second sliding block are movably connected with the mounting base assembly, the first sliding block and the second sliding block have a clamping state in which the first sliding block and the second sliding block get close to each other and a to-be-clamped state in which the first sliding block and the second sliding block get away from each other, the first sliding block is provided with a first clamping face, and the second sliding block is provided with a second clamping face; the first clamping surface and the second clamping surface are oppositely arranged; and the second clamping assembly is movably connected with the mounting seat assembly, and the second clamping assembly has a clamping state close to the first clamping assembly and a to-be-clamped state far away from the first clamping assembly. According to the technical scheme, the problem that the needling position deviates due to the fact that the position of the battery is not fixed in the needling experiment process of the cylindrical battery in the prior art is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery detection, and in particular to a cylindrical battery clamp and a needle puncture testing machine. BACKGROUND

[0002] During use, electric vehicles may have a short circuit, extrusion, puncture and other phenomena of the battery, thereby causing the battery to produce gas, heat, fire and explosion. Therefore, the safety performance of lithium ion batteries is of great significance.

[0003] In the production process, a needle puncture test is often used to test the safety performance of lithium ion batteries, and the battery to be tested is usually placed on a needle puncture testing machine and punctured by a steel needle.

[0004] In the prior art, the steel needle and the surface of the cylindrical lithium ion battery are prone to slipping during the needle puncture test, which causes the puncture position to deviate and affects the test results, such as CN105643704A. UTILITY MODEL CONTENT

[0005] One of the technical problems to be solved by the present application is that the position of the battery is not fixed during the needle puncture test of the cylindrical battery, which causes the needle puncture position to deviate.

[0006] To solve the above technical problems, the present application provides a cylindrical battery clamp and a needle puncture testing machine.

[0007] The cylindrical battery clamp and the needle puncture testing machine according to the present application comprise: a mounting seat assembly; a first clamping assembly, the first clamping assembly comprising a first sliding block and a second sliding block, the first sliding block and the second sliding block being movably connected to the mounting seat assembly, the first sliding block and the second sliding block having a clamping state of approaching each other and a clamping state of being away from each other, the first sliding block having a first clamping surface, the second sliding block having a second clamping surface, the first clamping surface and the second clamping surface being oppositely arranged; and a second clamping assembly, the second clamping assembly being movably connected to the mounting seat assembly, the second clamping assembly having a clamping state of approaching the first clamping assembly and a clamping state of being away from the first clamping assembly.

[0008] In some embodiments, the mounting seat assembly comprises a vertical mounting seat, the first sliding block and the second sliding block are movably connected to the vertical mounting seat, and the distance between the first clamping surface and the second clamping surface increases continuously in the direction of approaching and away from the vertical mounting seat.

[0009] In some embodiments, the first clamping surface and the second clamping surface are both quarter circular arc surfaces, and the diameters of the two are the same.

[0010] In some embodiments, the first slider comprises a first limiting section, a first connecting section and a first clamping section, the first limiting section, the first connecting section and the first clamping section are sequentially connected, the second slider comprises a second limiting section, a second connecting section and a second clamping section, the second limiting section, the second connecting section and the second clamping section are sequentially connected, the vertical mounting seat comprises a vertical guide rail, a cross section of the vertical guide rail is T-shaped, the first limiting section and the second limiting section are movably arranged in the vertical guide rail, the first connecting section and the second connecting section are partially arranged in the vertical guide rail.

[0011] In some embodiments, the first clamping assembly comprises a screw rod, the screw rod is rotatably connected with the vertical mounting seat, the screw rod is partially arranged in the vertical guide rail and an axis of the screw rod is arranged parallel to the vertical guide rail, the first slider and the second slider are rotatably connected with the screw rod.

[0012] In some embodiments, the first slider further comprises a first threaded hole, the first threaded hole sequentially penetrates the first limiting section, the first connecting section and the first clamping section, the second slider further comprises a second threaded hole, the second threaded hole sequentially penetrates the second limiting section, the second connecting section and the second clamping section, the screw rod comprises a first threaded section and a second threaded section, the first threaded section and the second threaded section are opposite in rotation direction, the first threaded hole is matched with the first threaded section, and the second threaded hole is matched with the second threaded section.

[0013] In some embodiments, the vertical mounting seat further comprises a limiting groove, the screw rod comprises a limiting hole, the limiting hole is arranged in the limiting groove, a limiting column is arranged in the limiting hole, and a projection width of the limiting groove in a vertical direction is greater than a length of the limiting column.

[0014] In some embodiments, a side of the second clamping assembly facing the first clamping assembly has a spacing with the vertical mounting seat which is continuously increased in a direction from both ends to a middle.

[0015] In some embodiments, the side of the second clamping assembly facing the first clamping assembly has a plurality of sawteeth.

[0016] According to another aspect of the present application, a needle puncture testing machine is also provided, the needle puncture testing machine adopts the cylindrical battery clamp, the needle puncture testing machine comprises a workbench and a test steel needle, the mounting seat assembly is connected with the workbench, and the test steel needle is arranged towards the workbench.

[0017] By the technical scheme, the cylindrical battery clamp and the needle puncture testing machine provided by the application place the battery to be detected between the first sliding block and the second sliding block, the first sliding block and the second sliding block are close to each other, the second clamping assembly moves towards the first clamping assembly, the battery to be detected is subjected to the combined force from the first sliding block, the second sliding block and the second clamping assembly, the position is fixed, and then the needle puncture test is performed. The technical scheme effectively solves the problem in the prior art that the position of the battery is not fixed during the needle puncture test of the cylindrical battery, and the needle puncture position is deviated. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0019] Figure 1 The structure schematic diagram of the cylindrical battery clamp disclosed by the first embodiment of the application is shown;

[0020] Figure 2 The structure schematic diagram of the first clamping assembly of the cylindrical battery clamp of Figure 1 is shown;

[0021] Figure 3 The structure schematic diagram of the vertical mounting seat of the cylindrical battery clamp of Figure 1 is shown;

[0022] Figure 4 The structure schematic diagram of the first sliding block of the cylindrical battery clamp of Figure 1 is shown;

[0023] Figure 5 The structure schematic diagram of the second sliding block of the cylindrical battery clamp of Figure 1 is shown;

[0024] Figure 6 The structure schematic diagram of the screw rod of the cylindrical battery clamp of Figure 1 is shown;

[0025] Figure 7 The structure schematic diagram of the second clamping assembly of the cylindrical battery clamp of Figure 1 is shown.

[0026] Explanation of reference signs:

[0027] 10, mounting seat assembly; 11, vertical mounting seat; 111, vertical guide rail; 112, limiting groove; 12, horizontal mounting seat; 20, first clamping assembly; 21, first sliding block; 211, first clamping surface; 212, first limiting section; 213, first connecting section; 214, first clamping section; 215, first threaded hole; 22, second sliding block; 221, second clamping surface; 222, second limiting section; 223, second connecting section; 224, second clamping section; 225, second threaded hole; 23, screw rod; 231, first threaded section; 232, second threaded section; 233, limiting hole; 30, second clamping assembly; 31, sawtooth. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be further described in conjunction with the drawings and examples. The following detailed description of the examples and drawings is provided for the purpose of illustration only and not intended to limit the scope of the present application, which can be implemented in many different forms, not limited to the specific examples of the present application, but includes all technical solutions falling within the scope of the claims.

[0029] The present application provides these examples in order to make the present application thorough and complete, and fully express the scope of the present application to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these examples should be interpreted as merely exemplary, and not as a limitation.

[0030] It should be noted that, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] In addition, "first", "second" and similar words used in the present application do not represent any order, number or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0032] It should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be or can not be an intermediate device between the specific device and the first device or the second device.

[0033] All the terms used in the present application have the same meaning as understood by those skilled in the art to which the present application belongs, unless otherwise specifically defined. It should also be understood that the terms defined in, for example, a general dictionary should be interpreted in a manner consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or excessively formalized sense, unless otherwise defined herein.

[0034] The techniques, methods, and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods, and devices should be considered as part of the specification.

[0035] As shown in Figures 1 to 7 The cylindrical battery clamp disclosed by the embodiment one of the present application comprises: a mounting seat assembly 10, a first clamping assembly 20 and a second clamping assembly 30, the first clamping assembly 20 comprises a first sliding block 21 and a second sliding block 22, the first sliding block 21 and the second sliding block 22 are movably connected to the mounting seat assembly 10, the first sliding block 21 and the second sliding block 22 have a clamping state of approaching each other and a clamping state of being away from each other, the first sliding block 21 has a first clamping surface 211, the second sliding block 22 has a second clamping surface 221, the first clamping surface 211 and the second clamping surface 221 are oppositely arranged, the second clamping assembly 30 is movably connected to the mounting seat assembly 10, and the second clamping assembly 30 has a clamping state of approaching the first clamping assembly 20 and a clamping state of being away from the first clamping assembly 20.

[0036] The technical scheme of the embodiment one is applied, the battery to be detected is placed between the first sliding block 21 and the second sliding block 22, the first sliding block 21 and the second sliding block 22 approach each other, the second clamping assembly 30 moves towards the first clamping assembly 20, the battery to be detected is subjected to the combined action force from the first sliding block 21, the second sliding block 22 and the second clamping assembly 30, the position is fixed, and then the needle puncture experiment is carried out. The technical scheme of the embodiment one effectively solves the problem that in the prior art, the position of the battery is not fixed during the needle puncture experiment of the cylindrical battery, resulting in the deviation of the needle puncture position.

[0037] As shown in Figures 1 to 5As shown, in the technical solution of Embodiment 1, the mounting base assembly 10 includes a vertical mounting base 11. A first slider 21 and a second slider 22 are both movably connected to the vertical mounting base 11. The distance between the first clamping surface 211 and the second clamping surface 221 continuously increases along the direction from approaching to moving away from the vertical mounting base 11. The first clamping surface 211 and the second clamping surface 221 jointly clamp the cylindrical battery. The shapes of the first clamping surface 211 and the second clamping surface 221 are designed to match the shape of the cylindrical battery to achieve battery clamping. The first clamping surface 211 and the second clamping surface 221 provide symmetrical forces to the battery, ensuring clamping stability.

[0038] like Figures 1 to 5 As shown, in the technical solution of Embodiment 1, both the first clamping surface 211 and the second clamping surface 221 are quarter-circular arc surfaces, and they have the same diameter. The diameter of the arc surface is set according to the minimum size of the battery to be tested. The diameter of the arc surface is larger than the minimum diameter of the battery to be tested, thereby making the first clamping assembly 20 suitable for all sizes of batteries to be tested, thus improving its versatility.

[0039] like Figures 1 to 5 As shown, in the technical solution of Embodiment 1, the first slider 21 includes a first limiting section 212, a first connecting section 213, and a first clamping section 214, which are connected in sequence. The second slider 22 includes a second limiting section 222, a second connecting section 223, and a second clamping section 224, which are connected in sequence. The vertical mounting base 11 includes a vertical guide rail 111, which has a T-shaped cross-section. The first limiting section 212 and the second limiting section 222 are movably disposed within the vertical guide rail 111, and the first connecting section 213 and the second connecting section 223 are partially located within the vertical guide rail 111. The widths of the first limiting segment 212 and the second limiting segment 222 are less than the maximum width of the vertical guide rail 111 but greater than the minimum width of the vertical guide rail 111. The widths of the first connecting segment 213 and the second connecting segment 223 are less than the minimum width of the vertical guide rail 111, allowing the first slider 21 and the second slider 22 to slide freely along the vertical guide rail 111 without detaching from it. Both the first clamping segment 214 and the second clamping segment 224 include two segments. The second clamping segment 224 is arranged in a one-to-one correspondence with the first clamping segment 214. The first clamping segment 214 has a first clamping surface 211, and the second clamping segment 224 has a second clamping surface 221. The arrangement of the two first clamping segments 214 and the two second clamping segments 224 increases the contact point between the battery and the first clamping assembly 20 during clamping, further improving the stability of clamping. A predetermined gap exists between the two first clamping segments 214 to facilitate the insertion of a steel needle.

[0040] likeFigures 1 to 6 As shown, in the technical solution of Embodiment 1, the first clamping assembly 20 includes a screw 23, which is rotatably connected to the vertical mounting base 11. A portion of the screw 23 is located within the vertical guide rail 111, and the axis of the screw 23 is parallel to the vertical guide rail 111. The first slider 21 and the second slider 22 are rotatably connected to the screw 23. Since the first limiting segment 212 and the second limiting segment 222 are located within the vertical guide rail 111, the vertical guide rail 111 limits the movement of the first slider 21 and the second slider 22. Therefore, when the screw 23 rotates, the first slider 21 and the second slider 22 will not rotate. Under the action of the threaded transmission, the first slider 21 and the second slider 22 move along the vertical guide rail 111, thus clamping the battery. Using a threaded transmission to drive the movement of the first slider 21 and the second slider 22 results in a simple structure that is easy for operators to use.

[0041] like Figures 1 to 6 As shown, in the technical solution of Embodiment 1, the first slider 21 further includes a first threaded hole 215, which sequentially passes through the first limiting section 212, the first connecting section 213, and the first clamping section 214. The second slider 22 further includes a second threaded hole 225, which sequentially passes through the second limiting section 222, the second connecting section 223, and the second clamping section 224. The screw 23 includes a first threaded section 231 and a second threaded section 232, with the first threaded section 231 and the second threaded section 232 rotating in opposite directions. The first threaded hole 215 engages with the first threaded section 231, and the second threaded hole 225 engages with the second threaded section 232. The first threaded section 231 and the second threaded section 232 rotate in opposite directions, so that during rotation, the first slider 21, which cooperates with the first threaded section 231, and the second slider 22, which cooperates with the second threaded section 232, move in opposite directions. They move closer to each other or further away from each other, thereby clamping and releasing the battery. The arrangement of the first threaded section 231 and the second threaded section 232 allows the first slider 21 and the second slider 22 to be controlled simultaneously by simply rotating the screw 23, which is convenient for operators.

[0042] like Figures 1 to 6As shown in the technical scheme of Embodiment One, the vertical mounting seat 11 further comprises a limiting groove 112, the screw rod 23 comprises a limiting hole 233, the limiting hole 233 is located in the limiting groove 112, a limiting column is arranged in the limiting hole 233, and the projection width of the limiting groove 112 in the vertical direction is greater than the length of the limiting column. The limiting groove 112 is located at one end of the vertical guide rail 111, the limiting hole 233 is located in the limiting groove 112 after the screw rod 23 passes through the vertical mounting seat 11, the limiting column passes through the limiting hole 233, at this time, the limiting column is located in the limiting groove 112, and when the screw rod 23 rotates, the limiting column rotates together with the screw rod 23 in the limiting groove 112 and limits the movement of the screw rod 23 along its own axis direction, thereby avoiding the up-and-down shaking of the first sliding block 21 and the second sliding block 22 and the position offset of the battery.

[0043] As shown in the technical scheme of Embodiment One, Figure 1 and Figure 7 As shown in the technical scheme of Embodiment One, the side of the second clamping assembly 30 facing the first clamping assembly 20 has an increasing spacing between the two ends and the middle with respect to the vertical mounting seat 11. The mounting seat assembly 10 comprises a horizontal mounting seat 12, the horizontal mounting seat 12 is provided with a horizontal guide rail, the second clamping assembly 30 is movably connected with the horizontal guide rail, and the width of the horizontal guide rail increases in the direction of approaching and moving away from the second clamping assembly 30. The horizontal guide rail of this structure avoids the disengagement of the second clamping assembly 30 from the horizontal guide rail. The mounting seat assembly 10 further comprises a long hole, a fastener is arranged in the long hole, the fastener is located on the side of the second clamping assembly 30 away from the first clamping assembly 20, the position of the second clamping assembly 30 is adjusted by loosening the fastener, the position of the fastener is adjusted so that the fastener is tightly attached to the second clamping assembly 30, and after the fastener is tightened, the fastener cannot move along the long hole, and the second clamping assembly 30 cannot move away from the first clamping assembly 20. Therefore, the use of the fastener can avoid the movement of the second clamping assembly 30 during the battery piercing process, thereby avoiding the shaking of the battery. The second clamping assembly 30 is V-shaped, and the V-shaped end point corresponds to the middle position between the first sliding block 21 and the second sliding block 22 of the first clamping assembly 20. The second clamping assembly 30 and the first clamping assembly 20 jointly act on the battery to clamp the battery, thereby ensuring the firm fixation of the battery.

[0044] As shown in the technical scheme of Embodiment One, Figure 1 and Figure 7 As shown in the technical scheme of Embodiment One, the side of the second clamping assembly 30 facing the first clamping assembly 20 has a plurality of sawteeth 31. The second clamping assembly 30 comprises two V-shaped structures, the spacing between the two V-shaped structures is greater than the distance between the two first clamping segments 214, the second clamping assembly 30 exerts a force on the end of the battery, the first clamping assembly 20 exerts a force on the middle segment of the battery, so that the battery is stably clamped and is not easy to rotate, and the sawteeth 31 are arranged along the V-shaped surface, thereby improving the contact point position of the second clamping assembly 30 and the battery and improving the clamping stability.

[0045] The technical scheme of the second embodiment is different from the technical scheme of the first embodiment in that the second clamping assembly 30 comprises a connecting part and two moving parts, the connecting part is movably connected with the horizontal guide rail, the two moving parts have V-shaped surfaces close to one side of the first clamping assembly 20, the two moving parts are movably connected with the connecting part, and the two moving parts move close to or away from each other to be suitable for fixing batteries of different lengths, and the versatility is stronger.

[0046] According to another aspect of the present application, a pin test machine is also provided, the pin test machine adopts the cylindrical battery clamp, and the pin test machine comprises a workbench and a test steel needle, the mounting seat assembly 10 is connected with the workbench, and the test steel needle is arranged towards the workbench. The mounting seat assembly 10 is fixed on the workbench, the battery to be detected is clamped by the first clamping assembly 20 and the second clamping assembly 30, at this time, the position of the battery is fixed, the steel needle is adjusted to a suitable position, and the pin test experiment is performed on the battery.

[0047] As comprehensively described above, the V-shaped slider (the second clamping assembly 30) is adjusted to a suitable position, and the fastening bolt (the screw rod 23) is rotated clockwise, the end close to the knob of the fastening bolt is provided with left-handed threads on the screw holes on the upper arc-shaped slider (the first slider 21), and the other end of the fastening bolt is provided with right-handed threads on the screw holes on the lower arc-shaped slider (the second slider 22), when the fastening bolt is rotated clockwise, the two arc-shaped sliders move to the middle, thereby clamping the lithium ion cylindrical battery in cooperation with the V-shaped slider. The horizontal position fixing bolt (the fastener) and the nut are used to fix the V-shaped slider to prevent movement. The V-shaped slider with the sawtooth 31 can be compatible with multiple models of batteries in cooperation with the battery clamping module, and the cylindrical battery is less likely to slide; when the battery is fixed, the fastening bolt can be rotated to clamp and fix the battery.

[0048] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical scheme of the present application according to the above description.

[0049] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way.

Claims

1. A cylindrical battery gripper characterized by, The utility model relates to a kind of first clamping assembly and second clamping assembly, including: Mounting seat component (10); First clamping component (20), the first clamping component (20) includes first slider (21) and second slider (22), the first slider (21) and the second slider (22) are movably connected with the mounting seat component (10), the first slider (21) and the second slider (22) have mutually close clamping state and mutually remote state to be clamped, the first clamping surface (211) of the first slider (21) has the second clamping surface (221) of the second slider (22), the first clamping surface (211) and the second clamping surface (221) are oppositely arranged; Second clamping component (30), the second clamping component (30) is movably connected with the mounting seat component (10), and the second clamping component (30) has the clamping state close to the first clamping component (20) and the state to be clamped away from the first clamping component (20).

2. The cylindrical battery gripper of claim 1, wherein, The mounting seat component (10) includes vertical mounting seat (11), and the first slider (21) and the second slider (22) are movably connected with the vertical mounting seat (11), and the distance between the first clamping surface (211) and the second clamping surface (221) is constantly increasing along the direction close to the vertical mounting seat (11) to away from the vertical mounting seat (11).

3. The cylindrical battery gripper of claim 2, wherein, The first clamping surface (211) and the second clamping surface (221) are all quarter circular arc surfaces, and the diameters of the two are same.

4. The cylindrical battery gripper of claim 2, wherein, The first slider (21) includes first limiting section (212), first connecting section (213) and first clamping section (214), and the first limiting section (212), the first connecting section (213) and the first clamping section (214) are sequentially connected, the second slider (22) includes second limiting section (222), second connecting section (223) and second clamping section (224), and the second limiting section (222), the second connecting section (223) and the second clamping section (224) are sequentially connected, the vertical mounting seat (11) includes vertical guide rail (111), the cross section of the vertical guide rail (111) is T-shaped, the first limiting section (212) and the second limiting section (222) are movably arranged in the vertical guide rail (111), and the first connecting section (213) and the second connecting section (223) are partially located in the vertical guide rail (111).

5. The cylindrical battery gripper of claim 4, wherein, The first clamping component (20) includes screw rod (23), and the screw rod (23) is rotatably connected with the vertical mounting seat (11), the screw rod (23) is partially located in the vertical guide rail (111), and the axis of the screw rod (23) is arranged parallel to the vertical guide rail (111), and the first slider (21) and the second slider (22) are rotatably connected with the screw rod (23).

6. The cylindrical battery gripper of claim 5, wherein, The first slider (21) further comprises a first threaded hole (215) penetrating through the first limiting section (212), the first connecting section (213) and the first clamping section (214) in sequence, the second slider (22) further comprises a second threaded hole (225) penetrating through the second limiting section (222), the second connecting section (223) and the second clamping section (224) in sequence, the screw rod (23) comprises a first threaded section (231) and a second threaded section (232), the first threaded section (231) and the second threaded section (232) are opposite in rotation direction, the first threaded hole (215) is matched with the first threaded section (231), and the second threaded hole (225) is matched with the second threaded section (232).

7. The cylindrical battery gripper of claim 5, wherein, The vertical mounting seat (11) further comprises a limiting groove (112), the screw rod (23) comprises a limiting hole (233) located in the limiting groove (112), a limiting column is arranged in the limiting hole (233), and a projection width of the limiting groove (112) in the vertical direction is greater than a length of the limiting column.

8. The cylindrical battery gripper of claim 2, wherein, The second clamping assembly (30) is located on one side of the first clamping assembly (20) and gradually increases in spacing from the vertical mounting seat (11) in a direction from both ends to the middle.

9. The cylindrical battery gripper according to any one of claims 1 to 8, characterized in that, The second clamping assembly (30) has a plurality of sawteeth (31) on one side of the first clamping assembly (20).

10. A needle penetration testing machine characterized by, The needle puncture test machine adopts the cylindrical battery clamp in any one of claims 1 to 9, the needle puncture test machine comprises a workbench and a test steel needle, the mounting seat assembly (10) is connected with the workbench, and the test steel needle is arranged towards the workbench.

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