CN218036928U - Short circuit test fixture and short circuit test device - Google Patents

Abstract

The utility model relates to a short circuit test fixture and short circuit testing arrangement, short circuit test fixture include fixture and support and hold the mechanism. The supporting mechanism comprises a clamping seat and an elastic supporting piece capable of conducting electricity, the elastic supporting piece is installed on the clamping seat, and the clamping seat is provided with a clamping groove. The transferring mechanism moves to the material receiving station to receive the battery to be detected, the battery to be detected entering the detection space can be clamped into the clamping groove, the elastic abutting piece is elastically abutted to the shell of the battery to be detected, and the clamping piece of the clamping mechanism can clamp the positive lug of the battery to be detected. Therefore, the anode and the cathode of the battery to be tested are electrically connected with the two testing ends of the short-circuit tester through the clamping piece and the elastic abutting piece respectively so as to complete the short-circuit test. Moreover, the elastic abutting piece elastically abuts against the shell of the battery to be tested, so that the surface of the shell can always keep good contact with the elastic abutting piece. Therefore, the short circuit test fixture and the short circuit test device can ensure the accuracy of test results.

Description

Short circuit test fixture and short circuit test device

Technical Field

The utility model relates to a lithium battery equipment technical field, in particular to short circuit test fixture and short circuit testing arrangement.

Background

In the production process of the cylindrical battery, a short circuit test is required to detect whether a short circuit phenomenon exists between the positive electrode and the negative electrode. The common testing method is to clamp the casing of the cylindrical battery and the positive electrode tab by using a clamping piece respectively and connect the casing and the positive electrode tab to a short-circuit tester. After the battery clamping device is used for many times, the inner wall of the clamping piece can be abraded, and the outer wall of the shell of the cylindrical battery is arc-shaped, so that the clamping piece can not clamp the shell tightly, poor contact between the clamping piece and the shell is caused, and a test result is influenced.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need to provide a short circuit testing fixture and a short circuit testing apparatus that can ensure the accuracy of the testing result.

A short circuit test fixture, comprising:

the clamping mechanism comprises a conductive clamping piece; and

the clamping mechanism comprises a clamping seat and an elastic abutting part capable of conducting electricity, the elastic abutting part is arranged on the clamping seat, the clamping seat is provided with a clamping groove, and a detection space for placing a battery to be detected is formed between the clamping mechanism and the abutting mechanism;

the clamping piece can clamp the positive lug of the battery to be detected in the detection space, the battery to be detected entering the detection space can be clamped into the clamping groove, and the elastic abutting piece is elastically abutted to the shell of the battery to be detected.

In one embodiment, the slot is circular.

In one embodiment, the elastic abutting piece is an extension spring, and two ends of the extension spring are respectively fixed to the clamping seat.

A short circuit test apparatus comprising:

the transfer mechanism is provided with an accommodating position capable of bearing a battery to be tested, and the accommodating position can move between a material receiving station and a blanking station;

the short circuit testing fixture according to any one of the above preferred embodiments, wherein the short circuit testing fixture is disposed corresponding to the accommodating position, and the battery to be tested carried by the accommodating position is located in the detection space of the corresponding short circuit testing fixture; and

and the short circuit tester is provided with two testing ends, and the two testing ends are respectively and electrically connected with the elastic abutting piece and the clamping piece.

In one embodiment, the transfer mechanism is provided with a plurality of accommodating positions, and the short circuit testing device comprises a plurality of short circuit testing jigs corresponding to the accommodating positions one to one.

In one embodiment, the transport mechanism includes the carousel, and is a plurality of it follows to hold the position the circumference interval of carousel set up in the carousel, the carousel is rotatory can drive a plurality ofly it passes through in proper order to hold the position connect the material station reach the unloading station, it is a plurality of short circuit test fixture follows the circumference interval distribution of carousel can be followed the carousel is circular motion.

In one embodiment, the battery testing device further comprises a lifting mechanism, wherein the clamping mechanism is installed at the driving end of the lifting mechanism, and the lifting mechanism can drive the clamping piece to move along the axial direction of the battery to be tested.

In one embodiment, the lifting mechanism comprises a cam, a cam follower and a connecting plate arranged on the cam follower, the clamping mechanism is arranged on the connecting plate, and the cam follower can move along a cam groove of the cam to drive the connecting plate to move back and forth along the axial direction of the battery to be tested.

In one embodiment, the short circuit testing device is provided with a plurality of lifting mechanisms which correspond to the short circuit testing jigs one to one, and the lifting mechanisms share the same cam.

In one embodiment, the lifting mechanism further comprises a guide rod fixed on the connecting plate and a spring sleeved on the guide rod, and the clamping mechanism is slidably sleeved on the guide rod and abutted against the spring.

According to the short circuit test fixture and the short circuit test device, the transfer mechanism moves to the material receiving station to receive the battery to be tested, the battery to be tested entering the detection space can be clamped into the clamping groove, the elastic abutting piece is elastically abutted to the shell of the battery to be tested, and the clamping piece can clamp the positive lug of the battery to be tested. Therefore, the anode and the cathode of the battery to be tested are electrically connected with the two testing ends of the short-circuit tester through the clamping piece and the elastic abutting piece respectively so as to complete the short-circuit test. Moreover, the elastic abutting piece elastically abuts against the shell of the battery to be tested, so that the surface of the shell can always keep good contact with the elastic abutting piece. Therefore, the short circuit test fixture and the short circuit test device can ensure the accuracy of test results.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a part of a short circuit testing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the short circuit testing apparatus shown in FIG. 1 without a short circuit tester;

FIG. 3 is a schematic structural diagram of a holding mechanism in the short-circuit testing apparatus shown in FIG. 1;

fig. 4 is a schematic diagram of the clamping groove of the holding mechanism shown in fig. 3 when the battery to be tested is clamped in.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do 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, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2, the present invention provides a short circuit testing apparatus 10 and a short circuit testing fixture 100. The short circuit testing apparatus 10 includes a transferring mechanism 110, a short circuit testing fixture 100 and a short circuit tester 200.

The short circuit testing device 10 is used for performing short circuit testing on the battery 20 to be tested; the transferring mechanism 110 can receive the battery 20 to be tested, which is discharged in the previous process, at the material receiving station, and convey the battery 20 to be tested to the material discharging station. Specifically, the transfer mechanism 110 has a holding position (not shown) capable of bearing the battery 20 to be tested, and the holding position can move between the material receiving station and the discharging station, so that the battery 20 to be tested can be conveniently loaded and discharged.

The battery 20 to be tested is generally loaded in a holder (not shown), and the battery 20 to be tested has a positive tab 21 at an end far from the holder, i.e. an upper end. The side wall of the tray is provided with a clamping portion (not shown), and the clamping portion can be matched with the accommodating position on the transferring mechanism 110 to improve the stability of the transferring process and ensure that the angle of the battery 20 to be tested entering the transferring mechanism 110 is consistent every time. The battery 20 to be tested and the cup holder are transferred to the transfer mechanism 110 at the material receiving station, are conveyed towards the blanking station along with the transfer mechanism 110, and reach the blanking station after the short circuit test is completed.

The short circuit test fixture 100 is disposed corresponding to the accommodating position of the transferring mechanism 110, and the battery 20 to be tested, which is supported by the accommodating position, is located in the detection space of the corresponding short circuit test fixture 100. The short circuit testing fixture 100 can electrically connect the positive electrode and the negative electrode of the battery 20 to be tested located in the detection space with the two testing ends of the short circuit tester 200 respectively. The two testing terminals of the short circuit tester 200 can provide testing voltage, and when the positive electrode and the negative electrode of the battery 20 to be tested are electrically connected with the two testing terminals respectively, the short circuit tester 200 is started to test whether the positive electrode and the negative electrode of the battery 20 to be tested are short-circuited.

It should be noted that, during the process of moving the accommodating positions, the corresponding short circuit testing jig 100 moves synchronously with the accommodating positions, so as to keep the relative positions of the two unchanged. Therefore, in the process that the transferring mechanism 110 transfers the battery 20 to be tested from the material receiving station to the material discharging station, the short circuit testing fixture 100 can be electrically connected to the battery 20 to be tested, so that the short circuit tester 200 can perform testing normally. As can be seen, the short circuit testing apparatus 10 can complete the short circuit test by using the time for transferring the battery 20 to be tested, so that the testing efficiency is higher.

Specifically, in the present embodiment, the transfer mechanism 110 is provided with a plurality of accommodating positions, and the short circuit testing device 10 includes a plurality of short circuit testing jigs 100 corresponding to the plurality of accommodating positions one by one.

Each accommodating position can move to the material receiving station in sequence and receive the battery 20 to be tested, and the battery 20 to be tested also enters the detection space of the corresponding short circuit test fixture 100 after being received by the accommodating position. Then, the short circuit test fixture 100 can electrically connect the positive electrode and the negative electrode of the battery 20 to be tested with the two test terminals of the short circuit tester 200, respectively, so as to allow the short circuit tester 200 to perform a short circuit test. It can be seen that the short circuit testing device 10 can perform short circuit testing on a plurality of batteries 20 to be tested at the same time, so the testing efficiency can be further improved.

The transfer mechanism 110 may take the form of a conveyor belt, a conveyor chain, or the like. In this embodiment, transfer mechanism 110 includes carousel 111, and a plurality of circumferential interval that hold the position along carousel 111 set up in carousel 111, and carousel 111 is rotatory to drive a plurality of positions that hold and to connect material station and unloading station in proper order. The short circuit test fixtures 100 are arranged along the circumferential direction of the turntable 111 at intervals and can move circumferentially along with the turntable 111.

The rotary plate 111 can be in transmission connection with a power mechanism (not shown) through a rotating shaft (not shown), so that the rotary plate can rotate under the driving of the power mechanism. As the rotary table 111 rotates, the empty receiving positions can be sequentially transferred to the receiving station, and the receiving position receiving the battery 20 to be tested can move to the blanking station, and the short circuit test of the battery 20 to be tested is completed in the conveying process. The turntable 111 can drive the battery 20 to be tested to move along an arc-shaped path, so that the structure of the transfer mechanism 110 is more compact. In addition, a plurality of positions and the short circuit test fixture 100 that corresponds of holding can be under the drive of carousel 111 and constantly circulate between connecing material station and unloading station to guarantee that the test procedure lasts and go on.

Referring to fig. 1 again, the short circuit testing fixture 100 according to an embodiment of the present invention includes a clamping mechanism 120 and a supporting mechanism 130.

The holding mechanism 120 and the abutting mechanism 130 are disposed opposite to each other, so that a space (not shown) for placing the battery 20 to be tested is formed therebetween. Specifically, the clamping mechanism 120 and the abutting mechanism 130 are disposed opposite to each other along the axial direction of the battery 20 to be tested, i.e., the up-down direction shown in fig. 1, so as to form a detection space. When the battery 20 to be tested enters the testing space, the clamping mechanism 120 is located above the battery 20 to be tested.

Further, the clamping mechanism 120 includes a clamping member 121, and the clamping member 121 can clamp the positive tab 21 of the battery 20 to be tested located in the detection space. The clip 121 may be formed of a conductive material such as copper or aluminum, and thus may be conductive. Also, one test terminal of the short circuit tester 200 is electrically connected to the clamping member 121. Therefore, when the positive tab 21 is clamped by the clamp 121, the positive electrode of the battery 20 to be tested can be electrically connected to one of the testing terminals of the short circuit tester 200.

In addition, clamping mechanism 120 generally further includes a clamping driving member 123, and clamping driving member 123 may be a pneumatic claw or the like, and can drive clamping member 121 to clamp or open, so as to clamp or release positive tab 21.

Referring to fig. 3 and fig. 4, the abutting mechanism 130 includes a card socket 131 and an elastic abutting member 132, and the elastic abutting member 132 is installed on the card socket 131. The elastic supporting member 132 may be made of a conductive material such as copper or aluminum, so that it can conduct electricity. Moreover, the other testing end of the short circuit tester 200 is electrically connected to the elastic holding member 132. Specifically, the card socket 131 may also be formed by a conductive material, and the elastic supporting member 132 is electrically connected to the testing end of the short circuit tester 200 through the card socket 131.

The card socket 131 is provided with a card slot 1311, the battery 20 to be tested entering the detection space can be clamped into the card slot 1311, and the elastic abutting piece 132 elastically abuts against the shell of the battery 20 to be tested. The casing of the battery 20 to be tested is a negative electrode, so that the negative electrode of the battery 20 to be tested is electrically connected to the other testing end of the short circuit tester 200 through the elastic abutting member 132.

When the battery 20 to be tested is inserted into the card slot 1311 and the positive tab 21 is clamped by the clamping member 121, the short circuit tester 200 can perform a short circuit test on the battery 20 to be tested. Moreover, since the elastic supporting member 132 elastically supports against the housing of the battery 20 to be tested, the surface of the housing can always keep good contact with the elastic supporting member 132, thereby avoiding the influence on the accuracy of the test result due to poor contact.

Specifically, in this embodiment, the slot 1311 is circular. Thus, the shape of the card slot 1311 can be better matched with the shape of the housing of the battery 20 to be tested. After the battery 20 to be tested is clamped into the clamping groove 1311, the shell of the battery 20 to be tested can be better attached to the inner wall of the clamping groove 1311, and therefore the structure is more stable.

Specifically, in the present embodiment, the elastic supporting member 132 is an extension spring, and two ends of the extension spring are respectively fixed to the clamping seat 131. As shown in fig. 4, after the battery 20 to be tested is inserted into the card slot 1311, the battery 20 to be tested can radially abut against the extension spring, and the extension spring is elastically deformed. The elastically deformed extension spring generates an elastic force to elastically abut against the case of the battery 20 to be tested.

It should be noted that, in other embodiments, the elastic supporting member 132 may also be fixed to the metal spring plate of the card slot 1311. In addition, the elastic supporting member 132 may also be composed of an elastic member and a conductor, and the conductor is located in the slot 1311 and connected to the card seat 131 through an elastic member such as a spring or an elastic pad. The elastic member can be elastically deformed, so that the conductor is elastically abutted against the shell of the battery 20 to be tested.

In this embodiment, the short circuit testing apparatus 10 further includes a lifting mechanism 300, and the clamping mechanism 120 is mounted at the driving end of the lifting mechanism 300 and can move along the axial direction of the battery 20 to be tested under the driving of the lifting mechanism 300.

The axial direction of the battery 20 to be tested is the up-down direction shown in fig. 2, and after the battery 20 to be tested enters the detection space, the lifting mechanism 300 can drive the clamping mechanism 120 to descend until the clamping piece 121 descends to a height capable of clamping the positive tab 21. When the battery 20 to be tested is tested and the loading and unloading are performed, the lifting mechanism 300 can drive the clamping mechanism 120 to ascend, so that enough space is reserved for loading and unloading the battery 20 to be tested.

Further, in the embodiment, the lifting mechanism 300 includes a cam 310, a cam follower 320 and a connecting plate 330 disposed on the cam follower 320, and the holding mechanism 120 is mounted on the connecting plate 330. The cam follower 320 can move along the cam groove of the cam 310 to reciprocate the link plate 330 in the axial direction of the battery 20 to be tested.

Specifically, the cam 310 is provided with a cam groove (not shown) having a predetermined shape, and the cam groove extends along the circumferential direction of the cam 310. To move the cam follower 320 along the cam slot, the cam 310 may be driven to rotate. In addition, the cam 310 may also be kept fixed, and the driving clamping mechanism 120 performs a circular motion along the circumferential direction of the cam 310, and can also drive the cam follower 320 to slide along the cam groove.

Specifically, in the present embodiment, the clamping mechanism 120 and the abutting mechanism 130 both move circularly along with the rotating disc 111, so that the cam follower 320 can slide along the cam groove of the cam 310.

The short circuit test of one battery 20 to be tested is referred to as a test cycle, and in the test cycle, the holding mechanism 120 needs to be lifted according to a preset beat to match the actions of the steps. Upon completion of one detection cycle, the cam follower 320 moves along the cam groove by one rotation. It can be seen that, by correspondingly arranging the cam grooves, the clamping mechanism 120 can be lifted and lowered according to a preset rhythm by the cooperation of the cam 310 and the cam follower 320.

The cam transmission mode has periodicity, and as the cam follower 320 continuously runs along the cam groove, the holding mechanism 120 can periodically repeat the above actions, so as to match with a plurality of sequentially circulating detection periods, thereby realizing continuous detection of a plurality of batteries 20 to be detected. Therefore, when a plurality of batteries 20 to be tested are continuously processed, the control program can be simplified, and the electric control pressure is favorably reduced.

Further, in the present embodiment, the plurality of gripping mechanisms 120 are driven by the plurality of lifting mechanisms 300 to respectively lift. The plurality of lifting mechanisms 300 share the same cam 310. Specifically, the cam 310 may be disposed coaxially with the turntable 111, so that the cam followers 320 of the plurality of elevating mechanisms 300 are all disposed in the cam grooves of the cam 310.

Therefore, the short circuit testing device 10 can be provided with only one cam 310, and one cam 310 can cooperate with a plurality of cam followers 320 to drive a plurality of clamping mechanisms 120 to lift and lower simultaneously. It can be seen that the structure of the short circuit testing device 10 can be made significant, and the plurality of clamping mechanisms 120 can be synchronized more.

More specifically, the short circuit testing apparatus 10 further includes a mounting plate 400, and the link plate 330 is slidably coupled to the mounting plate 400 by a rail-slider assembly, so that the clamp member 121 can be stably maintained during the elevation process.

In this embodiment, the lifting mechanism 300 further includes a guide rod 340 fixed to the connecting plate 330 and a spring 350 sleeved on the guide rod 340, and the holding member 121 is slidably sleeved on the guide rod 340 and abuts against the spring 350. The guide rod 340 is matched with the spring 350, so that the clamping member 121 can be buffered, and the clamping member 121 is prevented from being collided with the battery 20 to be tested due to an overlarge descending distance and being damaged by the battery 20 to be tested.

In the short circuit testing fixture 100 and the short circuit testing apparatus 10, the transferring mechanism 110 moves to the receiving station to receive the battery 20 to be tested, the battery 20 to be tested entering the testing space is clamped into the clamping slot 1311, the elastic abutting member 132 elastically abuts against the shell of the battery 20 to be tested, and the clamping member 121 can clamp the positive tab of the battery 20 to be tested. It can be seen that the positive and negative electrodes of the battery 20 to be tested are electrically connected to the two testing terminals of the short circuit tester 200 through the clamping member 121 and the elastic supporting member 132, respectively, so as to complete the short circuit test. Moreover, since the elastic supporting member 132 elastically supports against the housing of the battery 20 to be tested, the surface of the housing can always keep good contact with the elastic supporting member 132. Therefore, the short circuit test fixture 100 and the short circuit test apparatus 10 can ensure the accuracy of the test result.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a short circuit test fixture which characterized in that includes:

the clamping mechanism comprises a conductive clamping piece; and

the clamping mechanism comprises a clamping seat and an elastic abutting part capable of conducting electricity, the elastic abutting part is arranged on the clamping seat, the clamping seat is provided with a clamping groove, and a detection space for placing a battery to be detected is formed between the clamping mechanism and the abutting mechanism;

the clamping piece can clamp the positive lug of the battery to be detected in the detection space, the battery to be detected entering the detection space can be clamped into the clamping groove, and the elastic abutting piece is elastically abutted to the shell of the battery to be detected.

2. The short circuit testing fixture of claim 1, wherein the slot is arc-shaped.

3. The short circuit testing fixture of claim 1, wherein the elastic supporting member is an extension spring, and two ends of the extension spring are respectively fixed to the clamping seat.

4. A short circuit testing apparatus, comprising:

the transferring mechanism is provided with an accommodating position capable of bearing a battery to be tested, and the accommodating position can move between a material receiving station and a blanking station;

the short circuit testing fixture of any one of claims 1 to 3, wherein the short circuit testing fixture is disposed corresponding to the accommodating position, and the battery to be tested carried by the accommodating position is located in the detection space of the corresponding short circuit testing fixture; and

and the short circuit tester is provided with two testing ends which are respectively and electrically connected with the elastic abutting piece and the clamping piece.

5. The short circuit testing device of claim 4, wherein the transfer mechanism is provided with a plurality of accommodating positions, and the short circuit testing device comprises a plurality of short circuit testing jigs corresponding to the accommodating positions one by one.

6. The short circuit testing device of claim 5, wherein the transferring mechanism comprises a turntable, the plurality of accommodating positions are arranged on the turntable at intervals along a circumferential direction of the turntable, the turntable rotates to drive the plurality of accommodating positions to sequentially pass through the material receiving station and the material discharging station, and the plurality of short circuit testing jigs are distributed at intervals along the circumferential direction of the turntable and can move circumferentially along with the turntable.

7. The short circuit testing device of claim 4, further comprising a lifting mechanism, wherein the clamping mechanism is mounted at the driving end of the lifting mechanism, and the lifting mechanism can drive the clamping member to move along the axial direction of the battery to be tested.

8. The short circuit testing device of claim 7, wherein the lifting mechanism comprises a cam, a cam follower and a connecting plate disposed on the cam follower, the clamping mechanism is mounted on the connecting plate, and the cam follower can move along a cam groove of the cam to drive the connecting plate to move back and forth along an axial direction of the battery to be tested.

9. The short circuit testing device of claim 8, wherein the short circuit testing device is provided with a plurality of lifting mechanisms corresponding to the short circuit testing jigs one to one, and the lifting mechanisms share the same cam.

10. The short circuit testing device of claim 8, wherein the lifting mechanism further comprises a guide rod fixed to the connecting plate and a spring sleeved on the guide rod, and the clamping mechanism is slidably sleeved on the guide rod and abuts against the spring.

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