Acupuncture testing machine for lithium battery detection

Abstract

The invention discloses a needling test machine for lithium battery detection, and relates to the technical field of lithium battery needling detection, the needling test machine comprises a test machine main body, a test bin and a puncture needle, the test bin is arranged on the test machine main body, the puncture needle is fixedly connected in the test bin, the needling test machine also comprises a first assembly and a second assembly, and the first assembly and the second assembly are located on the same vertical plane; through clamping of the magnetic clamping ring and filling of the magnetic fluid in the column rod, the position of the column rod can be effectively ensured not to be changed through magnetic attraction force of the magnetic clamping ring to the magnetic fluid in the column rod when the puncture needle performs puncture operation on the fixed lithium battery; meanwhile, due to the meshing design of the gear ring and the gear, the stability of the puncture needle during puncture impact on the lithium battery is further improved, it is effectively guaranteed that each puncture experiment is carried out strictly according to an expected puncture angle, and interference factors caused by instability of the lithium battery during puncture operation are reduced; and the accuracy of the test data is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery puncture detection, in particular to a puncture test machine for lithium battery detection. Background Art

[0002] Prior art, such as the Chinese patent entitled “A Needle Puncture Tester” with publication number CN213149191U, mentions that “On the one hand, the driving member 11 drives the screw 13 to rotate through the gear transmission assembly 12. The transmission of the screw 13 has the advantages of high precision and high transmission efficiency. Therefore, it can accurately drive the sliding member 2 to move back and forth, thereby driving the puncture needle 7 to move, and then allowing the puncture needle 7 to pass through the puncture hole 3140, so as to perform a needle puncture test on the battery module 6 to be tested. The operation is simple and convenient, which is conducive to the standardization of the needle puncture test. On the other hand, the battery mounting device 3 is further used to fix the battery module 6 to be tested to prevent the movement of the battery module from affecting the test results.”

[0003] 1. The devices in the above patent documents and prior art have the following problems in actual use: The battery puncture test in the above application documents and the prior art only fixes the lithium battery to be tested. This fixed orientation design has obvious limitations. On the one hand, in reality, lithium batteries will be punctured from different directions in various complex environments. For example, in actual use, lithium batteries will be punctured by sharp objects from multiple directions, and the existing fixed orientation puncture detection method cannot effectively simulate these multi-directional puncture situations, resulting in a large deviation between the test results and the actual situation. Specifically, fixed orientation puncture will make the test results too idealized and cannot accurately reflect the lithium battery in real multi-directional puncture. Safety performance in different scenarios. In terms of safety assessment, the effects of punctures in different directions on lithium batteries vary significantly. Horizontal punctures will cause lateral displacement of the electrode material inside the battery, increasing the risk of internal short circuits; vertical punctures will directly damage the positive and negative isolation layers of the battery, causing more violent reactions; oblique punctures will cause complex damage to multiple structures of the battery at the same time. Existing detection methods are unable to fully assess the risks brought about by punctures in different directions, and will incorrectly judge the safety of lithium batteries, causing some lithium batteries that have safety hazards in actual use to be put on the market, posing potential dangers to users.

[0004] 2. Although the above patent mentions that the battery to be tested by needle puncture should be fixed, the fixing method in the document is only applicable to the clamping and fixing of regular square batteries, and is not applicable to the clamping of cylindrical and irregular lithium battery packs, which brings limitations to the detection; on the one hand, during the needle puncture process, due to the insufficient tightness of the clamping device, the battery will fall off the clamping device when it is loose. If the battery is in a hot or unstable state at this time, the impact of the fall will cause further damage to the internal structure of the battery, thereby triggering a stronger reaction, damaging surrounding equipment, causing fire, and causing casualties and property losses; on the other hand, loose fastening will change the stress condition of the battery during the needle puncture process; this will cause the pressure sensor to be unable to accurately measure the actual pressure during needle puncture, and the temperature sensor will also be unable to accurately monitor the temperature change of the battery due to the change in the battery position, thereby making the test data unreliable and unable to provide an accurate basis for the safety assessment of the battery.

[0005] Therefore, we proposed a lithium battery puncture tester to solve the above problems. Summary of the invention

[0006] In view of this, the technical problem to be solved by the present invention is to propose a lithium battery puncture tester to solve the problems existing in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solutions: A lithium battery puncture tester, comprising: a tester body, a test chamber, and a puncture needle, wherein the test chamber is provided on the tester body, and the puncture needle is fixedly connected in the test chamber, and further comprising: a first component and a second component, wherein the first component and the second component are located on the same vertical plane; The first component is used to simulate the multi-directional impact simulation test of the lithium battery when it is actually impacted and punctured; The second component is used for fastening square, cylindrical and special-shaped lithium batteries.

[0008] As an improvement, the first component includes an electric telescopic rod fixedly connected in the test chamber, four electric telescopic rods are provided, and the electric telescopic rods are equidistantly arranged in the test chamber. A driving motor is fixedly connected to the middle of the test chamber, and the shaft end of the driving motor is laterally fixedly connected to the column.

[0009] As an improvement, a column rod is movably inserted in the column, a magnetic clamping ring is clamped on the column, and two sections of the column rod are fixedly connected to support members.

[0010] As an improvement, the upper ends of the two support members are commonly fixedly connected to a fixing plate, and the upper surface of the fixing plate is magnetically fixedly connected to a magnetic fixing plate group.

[0011] As an improvement, the upper end of the electric telescopic rod is fixedly connected to a ring groove, the inner groove of the ring groove is fixedly connected to a gear ring, the column is fixedly connected to a connecting rod, and the end of the connecting rod away from the column is rotatably connected to a gear.

[0012] As an improvement, the second component includes a perfusion tube fixedly connected to the column rod, a vertical cavity is opened in the support member, and a sliding plate is slidably connected in the vertical cavity.

[0013] As an improvement, a working cavity is opened in the fixed plate, a spring body is fixedly connected to the cavity wall of the working cavity, an auxiliary plate is fixedly connected to one end of the spring body away from the cavity wall of the working cavity, a fixing rod is fixedly connected to the auxiliary plate, and a cylindrical cavity is opened in the fixing rod.

[0014] As an improvement, the cylinder is provided with slots at equal intervals, and the slots are matched with the magnetic clamping ring.

[0015] As an improvement, the column rod is a hollow structure, and magnetic fluid is perfused inside the column rod through a perfusion tube.

[0016] As an improvement, the support member is provided with a perfusion port, through which the solution can be perfused into the vertical cavity.

[0017] Compared with the prior art, the present invention provides a lithium battery puncture tester, which has the following beneficial effects: 1. The present application can effectively simulate the state of lithium batteries being punctured from different directions in various complex environments in reality through the design of the first component; unlike the design in the prior art and the above-mentioned application documents that only fixes the lithium battery to be tested and cannot adjust the puncture direction, the present application improves the obvious test limitations, it effectively reduces the deviation between the test results and the actual situation, and can effectively reflect the safety performance of lithium batteries in real multi-directional puncture scenarios; the present application has achieved a relatively comprehensive assessment of the risk of lateral displacement of electrode materials inside the battery to increase internal short circuits, damage to the positive and negative isolation layers of the battery, and complex damage to multiple structures of the battery caused by oblique puncture; from the perspective of research and development, the present application can assist in analyzing the weak links of lithium batteries at different puncture angles, so as to carry out targeted structural design and material selection to improve the safety and reliability of lithium batteries, which is conducive to the optimization and improvement of lithium battery structures.

[0018] 2. The present application can quickly fasten lithium batteries of different shapes through the design of the second component; different from the limitation of the above application documents that only regular batteries can be fixed, that is, the present application is suitable for clamping square, cylindrical and irregular-shaped lithium battery packs. This design can effectively prevent the battery from loosening due to insufficient tightness of the clamping device, and then falling off from the clamping device. If the battery is in a hot or unstable state when it falls off, the impact of the fall will cause further damage to the internal structure of the battery, thereby triggering a stronger reaction, damaging equipment, causing fire, and causing casualties and property losses; at the same time, the fixing design of the present application can avoid the impact caused by the falling of lithium batteries, can ensure the normal use of various sensors in the device, ensure the reliability of test data, and provide an accurate basis for battery safety assessment.

[0019] 3. The present application adopts the clamping design of the magnetic clamping ring and the infusion of magnetic fluid in the column rod, so that when the puncture needle performs a puncture operation on the fixed lithium battery, the magnetic attraction force of the magnetic clamping ring on the magnetic fluid in the column rod can effectively ensure that the position of the column rod does not change; at the same time, the meshing design of the gear ring and the gear further improves the stability of the puncture needle when puncturing the lithium battery, effectively ensuring that each puncture experiment is carried out strictly in accordance with the expected penetration angle, reducing the existence of interference factors caused by the instability of the lithium battery during the puncture operation, and further improving the accuracy of the test data.

[0020] 4. In the present application, an aqueous solution is poured from the pouring port on the support member into the support member and the vertical cavity and the cylindrical cavity, thereby indirectly enabling the second component to effectively adapt to lithium batteries of different shapes; the aqueous solution poured into the cylindrical cavity can effectively reduce the thermal expansion of the fixing rod that fastens the lithium battery when the battery is punctured, damaged and heated, thereby increasing the service life of the component; and because water is compressible, the lithium battery can still be fastened even after the fixing rod is deformed by heat. The above design is different from the application documents and the prior art, in which the service life of the fastening components is reduced and the fastening effect has problems due to thermal expansion and contraction caused by damage to the lithium battery.

[0021] 5. In this application, the electric telescopic rod and the driving motor are designed and used. Even during the puncture test, the lithium battery can still move in angle and direction. In this way, on the basis of the puncture direction being close to reality, the real scene is further simulated. For example, when the vehicle brakes fail and hits the guardrail or obstacle, the direction of the vehicle battery is difficult to determine, thereby further improving the perfection of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram related to the main structure of the present invention and the main position distribution of the testing machine; Figure 2 It is a three-dimensional schematic diagram of the main structure of the present invention; Figure 3 This is a related structural diagram when the fixed plate of the present invention is in a horizontal state; Figure 4 For the present invention Figure 3 A magnified view of the local structure at center A; Figure 5 This is a related structural diagram after the angle and orientation of the fixed plate of the present invention are adjusted; Figure 6 This is a disassembled diagram of the related structures of the column, column rod, and magnetic clamp ring of the present invention; Figure 7 This is a structural diagram of the vertical cavity and the sliding plate of the present invention; Figure 8 This is a diagram of the relevant structure of the cylinder and support member after cutting; Fig. 9 For the present invention Figure 8 A magnified view of the local structure at B in the middle; Fig.10 It is a front view of the main structure of the present invention.

[0023] In the figure: 1. Test machine body; 2. Test chamber; 3. Puncture needle; 4. First component; 401. Electric telescopic rod; 402. Driving motor; 403. Column; 404. Column; 405. Magnetic clamping ring; 406. Support member; 407. Fixed plate member; 408. Magnetic fixed plate group; 409. Ring groove ring; 410. Gear ring; 411. Connecting rod; 412. Gear; 5. Second component; 501. Infusion tube; 502. Vertical cavity; 503. Sliding plate; 504. Working cavity; 505. Spring body; 506. Auxiliary sheet; 507. Fixing rod; 508. Column cavity. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0026] Example: Please refer to Figures 1 to 7 , Fig.10 As shown: In order to solve the problems mentioned in the technical solution, the embodiment of the present application provides a puncture tester for lithium battery detection, including: a tester body 1, a test chamber 2, and a puncture needle 3, the test chamber 2 is opened on the tester body 1, and the puncture needle 3 is fixedly connected in the test chamber 2, and also includes: a first component 4 and a second component 5, and the first component 4 and the second component 5 are on the same vertical plane.

[0027] The first component 4 is used to simulate the multi-directional impact simulation test of the lithium battery when it is actually hit and punctured; the first component 4 includes an electric telescopic rod 401 fixedly connected to the test chamber 2, four electric telescopic rods 401 are provided, and the electric telescopic rods 401 are equidistantly arranged in the test chamber 2, a driving motor 402 is fixedly connected to the middle of the test chamber 2, the shaft end of the driving motor 402 is transversely fixedly connected to the cylinder 403, a column 404 is movably inserted in the cylinder 403, and a magnetic card is clamped on the cylinder 403 The connecting ring 405 and the two sections of the column 404 are fixedly connected with the support members 406, the upper ends of the two support members 406 are commonly fixedly connected with the fixing plate 407, the upper surface of the fixing plate 407 is magnetically fixedly connected with the magnetic fixing plate group 408, the upper end of the electric telescopic rod 401 is fixedly connected with the annular groove ring 409, the inner groove of the annular groove ring 409 is fixedly connected with the gear ring 410, the column 404 is fixedly connected with the connecting rod 411, and the end of the connecting rod 411 away from the column 404 is rotatably connected with the gear 412.

[0028] in: The first component 4 is mainly used for simulating the multi-directional impact simulation test of the lithium battery when it is actually hit and punctured.

[0029] The cylinder 403 is provided with slots at equal intervals, and the slots are matched with the magnetic clamping ring 405 .

[0030] The column 404 is a hollow structure, and magnetic fluid is injected into the interior thereof through the injection tube 501 .

[0031] The magnetic clamping ring 405 is mainly used in conjunction with the magnetic fluid injected into the column 404 to reduce the movement of the column 404 when the puncture needle 3 impacts the lithium battery on the second component 5, thereby improving the stability of the overall test work.

[0032] The magnetic fixing plate assembly 408 is composed of a spring body 505 , an auxiliary plate 506 , a fixing rod 507 , and a cylindrical cavity 508 , and is externally connected to an air-filled pipe. The fastening operation is the same as that of the second assembly 5 .

[0033] The gear 412 is meshed with the ring gear 410 and is suitable for matching.

[0034] For further examples, please refer to Figures 7 to 10 As shown: The second component 5 is used for fastening square, cylindrical and special-shaped lithium batteries. The second component 5 includes a perfusion tube 501 fixedly connected to the column rod 404, a vertical cavity 502 is opened in the support member 406, a sliding plate 503 is slidably connected in the vertical cavity 502, a working cavity 504 is opened in the fixed plate member 407, a spring body 505 is fixedly connected to the inner cavity wall of the working cavity 504, an auxiliary piece 506 is fixedly connected to the end of the spring body 505 away from the inner cavity wall of the working cavity 504, a fixing rod 507 is fixedly connected to the auxiliary piece 506, and a columnar cavity 508 is opened in the fixing rod 507.

[0035] in: The second component 5 is mainly used for fastening square, cylindrical and special-shaped lithium batteries.

[0036] The perfusion tube 501 is a delivery conduit for perfusing magnetic fluid into the column rod 404 .

[0037] The support member 406 is provided with a perfusion port, through which a solution, such as water, can be perfused into the vertical cavity 502 .

[0038] The sliding plate 503 is slidably adapted in the vertical cavity 502 .

[0039] The vertical cavity 502 , the working cavity 504 , and the cylindrical cavity 508 are connected.

[0040] The spring body 505 is mainly used to pull the auxiliary piece 506 to reset the fixing rod 507.

[0041] The auxiliary sheet 506 is slidably adapted in the working chamber 504 .

[0042] After the aqueous solution is poured into the columnar cavity 508, when the lithium battery is damaged and generates heat during the needle puncture test, the aqueous solution in the columnar cavity 508 will reduce the probability of the columnar cavity 508 expanding due to heat, thereby reducing the reduction in the service life of the columnar cavity 508 caused by the changes in hot and cold expansion.

[0043] Everything in the above example works like this: In the initial state: the support member 406 and the connecting rod 411 are in a vertical state; the spring body 505 is not stretched.

[0044] It should be noted that the angle and orientation of the fixing plate 407 need to be adjusted according to the test requirements of the tester. At the same time, the number of magnetic fixing plate group 408 and magnetic clamping rings 405 clamped on the cylinder 403 can be adaptively increased or decreased according to the shape and size of the lithium battery to be tested.

[0045] The following is the working process of the first component 4: When adjusting the position of the lithium battery to be tested fixed on the fixing plate 407, the angle and orientation of the fixing plate 407 are mainly adjusted; specifically: Angle adjustment: First, start the electric telescopic rod 401. The electric telescopic rod 401 will move upward with the annular groove ring 409 at its top during extension. During the upward movement of the annular groove ring 409, the gear 412 in the annular groove of the annular groove ring 409 will not rotate in the meshing with the teeth of the gear ring 410, but the connection between it and the connecting rod 411 will rotate. That is, during the upward movement of the annular groove ring 409, the connecting rod 411 will rotate with the rotating connection with the gear 412 as the rotation axis. Since it is known that the connecting rod 411 is fixedly connected to the column 404, and the column 404 is indirectly fixedly connected to the fixed plate 407 through the support 406, when the connecting rod 411 is deflected, the fixed plate 407 on the support 406 will also be deflected, that is, the fixed plate 407 that was originally in a horizontal state will become tilted, and the angle adjustment of the fixed plate 407 is completed.

[0046] Azimuth adjustment: Start the drive motor 402. Since it is known that the column 404 is sleeved in the column 403 fixedly connected to the upper end of the drive motor 402, when the drive motor 402 rotates, the column 404 sleeved in the column 403 will rotate accordingly, thereby completing the azimuth adjustment. During this process, the gear 412 on the connecting rod 411 fixedly connected to the column 404 will move on the gear ring 410 in the annular groove ring 409, thereby providing stability for the azimuth adjustment of the column 404.

[0047] Furthermore, the present application can effectively simulate the state of lithium batteries being punctured from different directions in various complex environments in reality through the design of the first component 4; different from the design in the prior art and the above-mentioned application documents that only fix the lithium battery to be tested and cannot adjust the puncture direction, the present application improves the obvious test limitations, it effectively reduces the deviation between the test results and the actual situation, and can effectively reflect the safety performance of lithium batteries in real multi-directional puncture scenarios; for the lateral displacement of the internal electrode material of the battery to increase the risk of internal short circuit, damage to the positive and negative isolation layers of the battery, and oblique puncture causing complex damage to multiple structures of the battery, the present application has achieved a relatively comprehensive assessment; from the research and development perspective, the present application can assist in analyzing the weak links of lithium batteries at different puncture angles, so as to carry out targeted structural design and material selection to improve the safety and reliability of lithium batteries, which is conducive to the optimization and improvement of the lithium battery structure.

[0048] Furthermore, in the present application, through the design and use of the electric telescopic rod 401 and the drive motor 402, the lithium battery can still move in angle and direction even during the puncture test. In this way, on the basis of the puncture direction being close to reality, the real scene is further simulated. For example, when the vehicle brakes fail and crash into a guardrail or obstacle, the direction of the vehicle battery is difficult to determine, thereby further improving the perfection of the detection.

[0049] Furthermore, the present application, through the clamping design of the magnetic clamping ring 405 and the infusion of magnetic fluid in the column 404, can effectively ensure that the position of the column 404 does not change when the puncture needle 3 performs a puncture operation on the fixed lithium battery through the magnetic attraction force of the magnetic clamping ring 405 on the magnetic fluid in the column 404; at the same time, the meshing design of the ring gear 410 and the gear 412 further improves the stability of the puncture needle 3 when puncturing the lithium battery, effectively ensuring that each puncture experiment is carried out strictly in accordance with the expected insertion angle, reducing the existence of interference factors caused by the instability of the lithium battery during the puncture operation, and further improving the accuracy of the test data.

[0050] Please refer to the above working process Figures 1 to 7 , Fig.10 .

[0051] The following is the working process of the second component 5: During use, aqueous solution can be added to the vertical cavity 502 and the working cavity 504 connected to the vertical cavity 502 through the filling port on the support member 406 with the assistance of an external water pump. At this time, the cylindrical cavity 508 opened on the fixing rod 507 will also be filled with aqueous solution. Further, with the filling of aqueous solution, the fixing rod 507 will gradually move toward the direction close to the lithium battery to be tested, and the spring body 505 will be stretched at this time. Further, under the continuous perfusion of aqueous solution, the fixing rods 507 located at different positions on the fixing plate 407 will adaptively approach and finally abut and tighten the lithium battery to be tested, thereby completing the lithium battery fixing work before the puncture test.

[0052] Furthermore, the present application can quickly fasten lithium batteries of different shapes through the design of the second component 5; different from the limitation of only being able to fix regular batteries in the above-mentioned application documents, that is, the present application is suitable for clamping square, cylindrical and irregular-shaped lithium battery packs. This design can effectively prevent the battery from loosening due to insufficient tightness of the clamping device, and then falling off from the clamping device. If the battery is in a hot or unstable state when it falls off, the impact of the fall will cause further damage to the internal structure of the battery, thereby triggering a stronger reaction, damaging equipment, causing fire, and causing casualties and property losses; at the same time, the fixing design of the present application can avoid the impact caused by the falling of lithium batteries, can ensure the normal use of various sensors in the device, ensure the reliability of test data, and provide an accurate basis for battery safety assessment.

[0053] Furthermore, in the present application, an aqueous solution is poured from the pouring port on the support member 406 into the support member 406 and the vertical cavity 502 and the cylindrical cavity 508, thereby indirectly enabling the second component 5 to effectively adapt to lithium batteries of different shapes; the aqueous solution poured into the cylindrical cavity 508 can effectively reduce the thermal expansion of the fixing rod 507 that fastens the lithium battery when the battery is punctured, damaged and heated, thereby increasing the service life of the component; and because water is compressible, the lithium battery can still be fastened even after the fixing rod 507 is deformed by heat. The above design is different from the application documents and the prior art in which the service life of the fastening components is reduced and the fastening effect has problems due to thermal expansion and contraction caused by damage to the lithium battery.

[0054] Please refer to the above working process Figures 7 to 10 .

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery puncture tester, comprising: A testing machine body (1), a testing chamber (2), and a puncture needle (3), wherein the testing chamber (2) is provided on the testing machine body (1), and the puncture needle (3) is fixedly connected in the testing chamber (2), and is characterized in that it further comprises: a first component (4) and a second component (5), wherein the first component (4) and the second component (5) are located on the same vertical plane; The first component (4) is used to simulate a multi-directional impact test of a lithium battery when it is actually impacted and punctured; The second component (5) is used to fasten square, cylindrical and special-shaped lithium batteries.

2. A lithium battery puncture tester according to claim 1, characterized in that: The first component (4) comprises an electric telescopic rod (401) fixedly connected in the test chamber (2), four electric telescopic rods (401) are provided, and the electric telescopic rods (401) are equidistantly arranged in the test chamber (2), a driving motor (402) is fixedly connected in the middle of the test chamber (2), and the shaft end of the driving motor (402) is transversely fixedly connected to the cylinder (403).

3. A lithium battery puncture tester according to claim 2, characterized in that: A column rod (404) is movably inserted into the column (403), a magnetic clamping ring (405) is clamped on the column (403), and two sections of the column rod (404) are fixedly connected to a support member (406).

4. A lithium battery puncture tester according to claim 3, characterized in that: The upper ends of the two support members (406) are commonly fixedly connected to a fixing plate member (407), and the upper surface of the fixing plate member (407) is magnetically fixedly connected to a magnetic fixing plate group (408).

5. The lithium battery puncture tester according to claim 3, characterized in that: The upper end of the electric telescopic rod (401) is fixedly connected to a ring groove (409), a gear ring (410) is fixedly connected in the inner groove of the ring groove (409), a connecting rod (411) is fixedly connected to the column (404), and one end of the connecting rod (411) away from the column (404) is rotatably connected to a gear (412).

6. A lithium battery puncture tester according to claim 3, characterized in that: The second component (5) comprises a perfusion tube (501) fixedly connected to the column rod (404), a vertical cavity (502) is provided in the support member (406), and a sliding plate (503) is slidably connected in the vertical cavity (502).

7. A lithium battery puncture tester according to claim 4, characterized in that: A working cavity (504) is defined in the fixed plate (407), a spring body (505) is fixedly connected to the inner cavity wall of the working cavity (504), an auxiliary sheet (506) is fixedly connected to one end of the spring body (505) away from the inner cavity wall of the working cavity (504), a fixing rod (507) is fixedly connected to the auxiliary sheet (506), and a columnar cavity (508) is defined in the fixing rod (507).

8. The lithium battery puncture tester according to claim 3, characterized in that: The cylinder (403) is provided with slots at equal intervals, and the slots are matched with the magnetic clamping ring (405).

9. The lithium battery puncture tester according to claim 6, characterized in that: The column rod (404) is a hollow structure, and magnetic fluid is injected into the interior thereof through an injection tube (501).

10. The lithium battery puncture tester according to claim 3, characterized in that: The support member (406) is provided with a filling port.

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