Battery cell testing device

Abstract

The utility model relates to a battery cell testing device. The testing device comprises a rack; the tray is fixed on the rack and is suitable for bearing the battery cell to be tested; the ejector pin mechanism comprises a mounting plate, a positive electrode ejector pin and a negative electrode ejector pin, the mounting plate is fixed on the rack, and a plurality of ejector pin mounting holes which are spaced from one another are formed in the mounting plate; and each of the positive electrode ejector pin and the negative electrode ejector pin is selectively arranged in the corresponding ejector pin mounting hole, so that the positive electrode ejector pin and the negative electrode ejector pin can be electrically connected with the positive electrode and the negative electrode of the battery cell respectively. The testing device provided by the utility model can improve the testing efficiency and the testing precision.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, and particularly to a testing device for battery cells. Background Art

[0002] A battery cell (i.e., a Battery Cell) is the core component in a storage battery that realizes charge and discharge. It mainly consists of a housing, a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, etc. The positive electrode plate and the negative electrode plate are two polar ends of the battery cell, and they are separated by a separator. Both the positive electrode plate and the negative electrode plate contain active substances, which are usually the sites of chemical reactions. The separator can prevent direct contact between the positive and negative electrode plates, but allows ions to pass through it. The electrolyte acts as a medium for ion transport and helps the smooth flow of ions.

[0003] According to different packaging methods and battery cell shapes, battery cells can be roughly divided into square battery cells, cylindrical battery cells, soft-pack battery cells, etc. Among them, a square battery cell has a housing in the shape of a roughly cuboid, and the positive electrode plate, the separator, and the negative electrode plate are arranged in layers in the housing in sequence. The square battery cell has many advantages such as high energy density, simple structure, safety and reliability, uniform heat dissipation, etc., so it has been widely used.

[0004] Currently, when testing a square battery cell, it is usually necessary to weld busbars at the positive and negative electrode posts of the square battery cell to connect the charge and discharge equipment, and then use equipment such as a resistance tester to test the internal resistance of the battery cell. This method not only requires special welding equipment and corresponding welding jigs, which is time-consuming and laborious and inconvenient to operate, but also the welded busbar connecting pieces will affect the test accuracy.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0006] In order to solve or to a certain extent improve the technical problems of low test efficiency and low test accuracy in the existing battery cell testing, the utility model provides a testing device for battery cells. The testing device includes: a frame; a tray, the tray is fixed on the frame and is adapted to carry the battery cell to be tested; a thimble mechanism, the thimble mechanism includes a mounting plate, a positive thimble and a negative thimble, the mounting plate is fixed on the frame, and a plurality of thimble mounting holes spaced apart from each other are provided on the mounting plate, wherein each of the positive thimble and the negative thimble can be selectively arranged in a corresponding one of the plurality of thimble mounting holes so as to be able to form electrical connections with the positive electrode and the negative electrode of the battery cell respectively.

[0007] Those skilled in the art can understand that the test device for the battery cell of the present utility model includes a frame, a tray and a thimble mechanism. The frame provides a suitable installation space for the tray and the thimble mechanism, and provides the structural stability of the entire test device. The tray is fixed on the frame and is used to carry the battery cell to be tested to ensure the stability of the battery cell during the test. The thimble mechanism includes a mounting plate fixed on the frame, a positive thimble and a negative thimble. A plurality of thimble mounting holes spaced apart from each other are provided on the mounting plate. The positive thimble is selectively arranged in a corresponding one of the plurality of thimble mounting holes, and the negative thimble is also selectively arranged in a corresponding one of the plurality of thimble mounting holes, so that during the test, the positive thimble and the negative thimble can be conveniently electrically connected to the positive electrode and the negative electrode of the battery cell. Therefore, the test device of the present utility model greatly simplifies the operation difficulty, improves the test efficiency, and can effectively avoid the influence of the welding connection piece on the test result, and improves the test accuracy.

[0008] In a preferred technical solution of the above-mentioned test device for the battery cell, the number of the thimble mounting holes is greater than or equal to 3. By selecting the thimble mounting holes at appropriate positions, the positive thimble and the negative thimble can meet the test requirements of battery cells of different specifications, so that the test device has good adaptability and versatility.

[0009] In a preferred technical solution of the above-mentioned test device for the battery cell, the tray is slidably fixed on the frame. Through the above setting, the battery cell to be tested can be conveniently placed on the tray, further improving the test efficiency.

[0010] In a preferred technical solution of the above-mentioned test device for the battery cell, a support plate is provided on the top of the tray, and a plurality of receiving grooves spaced apart from each other are provided on the support plate. Each receiving groove is adapted to confine a corresponding battery cell therein; and the thimble mechanism is respectively matched with each battery cell. Through the above setting, the test device tests a plurality of battery cells at the same time, further improving the test efficiency.

[0011] In a preferred technical solution of the above-mentioned test device for the battery cell, the test device further includes: a lifting mechanism, the lifting mechanism is fixed on the frame and is connected to the mounting plate, and the lifting mechanism is configured to drive the mounting plate to rise or fall relative to the frame. The setting of the lifting mechanism can make the positive thimble and the negative thimble arranged on the mounting plate conveniently and quickly abut against the positive electrode and the negative electrode of the battery cell.

[0012] In a preferred technical solution of the above-mentioned test device for the battery cell, the lifting mechanism is a manual screw jack, an electric screw jack, a pneumatic screw jack or a hydraulic screw jack. Through the above setting, the types of the lifting mechanism can be enriched to meet the differentiated design requirements of products.

[0013] In the preferred technical solution of the above-mentioned testing device for the electric core, a guide rod is provided on the frame, and a guide hole allowing the guide rod to be inserted therein is provided on the mounting plate. The setting of the guide rod can enable the mounting plate to maintain good stability during the lifting process, ensuring the reliability of the connection between the positive electrode pin and the negative electrode pin and the corresponding positive electrode and negative electrode.

[0014] In the preferred technical solution of the above-mentioned testing device for the electric core, the guide hole includes a first guide hole and a second guide hole respectively arranged at opposite ends of the mounting plate, and the plurality of thimble mounting holes are located between the first guide hole and the second guide hole. Through the above setting, the mounting plate can be more evenly stressed, improving the smoothness of its lifting process.

[0015] In the preferred technical solution of the above-mentioned testing device for the electric core, each of the positive electrode pin and the negative electrode pin includes: an outer cylinder fixed on the mounting plate and located in the corresponding thimble mounting hole; an inner cylinder movably arranged in the outer cylinder; and a contact piece arranged at one end of the inner cylinder and capable of contacting the corresponding positive electrode or negative electrode. Through the movable cooperation between the inner cylinder and the outer cylinder, the contact piece fixed at one end of the inner cylinder can be flexibly connected to the corresponding positive electrode or negative electrode, ensuring the connection efficiency and reliability.

[0016] In the preferred technical solution of the above-mentioned testing device for the electric core, a telescopic spring is sleeved on the inner cylinder, and the telescopic spring is telescopically arranged between the contact piece and the mounting plate. The setting of the telescopic spring can form a reliable flexible connection between the contact piece and the positive electrode and the negative electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, in which:

[0018] Figure 1 is a front structural schematic diagram of an embodiment of the testing device for the electric core of the present invention;

[0019] Figure 2 is a side structural schematic diagram of an embodiment of the testing device for the electric core of the present invention;

[0020] Figure 3 is a structural schematic diagram of an embodiment of the mounting plate in the testing device for the electric core of the present invention;

[0021] Figure 4 is a structural schematic diagram of an embodiment of the thimble in the testing device for the electric core of the present invention.

[0022] LIST OF REFERENCE NUMERALS:

[0023] 1. Testing device; 11. Frame; 111. Column; 112. Cross bar; 113. Longitudinal bar; 114. Roller; 12. Tray; 121. Support plate; 13. Thimble mechanism; 131. Mounting plate; 1311. Mounting plate body; 1312. Thimble mounting hole; 13121. First thimble mounting hole; 13122. Second thimble mounting hole; 13123. Third thimble mounting hole; 1313. Lifting connection hole; 1314. Guide hole; 13141. First guide hole; 13142. Second guide hole; 132a. Positive thimble; 132b. Negative thimble; 1321. Outer cylinder; 1322. Inner cylinder; 1323. Contact piece; 1324. Fixed plate; 1325. Telescopic spring; 14. Lifting mechanism; 141. Lead screw; 142. Control handle; 15. Guide rod; 151. First guide rod; 152. Second guide rod; 2. Battery cell; 21. Housing; 22. Positive electrode; 23. Negative electrode. Detailed implementation manners

[0024] The preferred implementation manners of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0025] It should be noted that in the description of the present utility model, the terms indicating the direction or position relationship such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. are based on the direction or position relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0026] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] To solve or to a certain extent improve the technical problems of low test efficiency and low test accuracy in the prior art for testing battery cells, the present utility model provides a testing device 1 for a battery cell 2. The testing device 1 includes: a frame 11; a tray 12, the tray 12 being fixed on the frame 11 and adapted to carry the battery cell 2 to be tested; a thimble mechanism 13, the thimble mechanism 13 including a mounting plate 131, a positive thimble 132a and a negative thimble 132b, the mounting plate 131 being fixed on the frame 11, and a plurality of thimble mounting holes 1312 spaced apart from each other being provided on the mounting plate 131, wherein each of the positive thimble 132a and the negative thimble 132b is selectively arranged in a corresponding one of the plurality of thimble mounting holes 1312 so as to be able to form electrical connections with the positive electrode 22 and the negative electrode 23 of the battery cell 2 respectively.

[0028] Figure 1 is a front structural schematic diagram of an embodiment of the testing device for the battery cell of the present utility model; Figure 2 is a side structural schematic diagram of an embodiment of the testing device for the battery cell of the present utility model. As Figure 1 shown, in one or more embodiments, the testing device 1 for the battery cell 2 of the present utility model includes a frame 11, a tray 12 and a thimble mechanism 13. The tray 12 is fixed on the frame 11 and is used to carry the battery cell 2 to be tested. The battery cell 2 can be but is not limited to a square battery cell 2. The battery cell 2 has a housing 21 and electrodes (including a positive electrode 22 and a negative electrode 23) arranged at the top of the housing 21. The thimble mechanism 13 is fixed on the frame 11 and is located above the tray 12. The thimble mechanism 13 has thimbles (including a positive thimble 132a and a negative thimble 132b) that can form electrical connections with the electrodes of the battery cell 2 so as to test the performance of the battery cell 2.

[0029] As Figure 1 and Figure 2 shown, in one or more embodiments, the frame 11 is formed by connecting columns 111, crossbars 112 and longitudinal bars 113 to each other. Each column 111 extends substantially in the vertical direction. The four columns 111 are respectively arranged at the four corners of a rectangle. Each crossbar 112 extends substantially in the horizontal direction left and right (based on Figure 1extends in the indicated orientation and is fixed between two adjacent columns 111. Correspondingly, each longitudinal rod 113 extends roughly horizontally back and forth and is fixed between two adjacent columns 111. Through the above settings, the entire frame 11 has a stable structure to provide a suitable installation space for components such as the tray 12 and the thimble mechanism 13. It should be noted that the frame 11 can be processed from a suitable metal material (such as stainless steel, etc.) to have good mechanical strength and rigidity. The columns 111, crossbars 112, and longitudinal rods 113 can be hollow tubes or solid tubes. The connection methods between the columns 111, crossbars 112, and longitudinal rods 113 include but are not limited to welding, screwing, etc. In one or more embodiments, a top plate (not shown in the figure) is also provided on the top of the frame 11 to conveniently fix components such as the thimble mechanism 13. In one or more embodiments, rollers 114 are also provided at the bottom of the frame 11 to facilitate flexible adjustment of the position of the test device 1 according to actual needs.

[0030] As Figure 1 and Figure 2 shown, the tray 12 is fixed to the frame 11 roughly horizontally, thus providing reliable support for the battery cell 2 and ensuring the stability of the battery cell 2 during the test process. In one or more embodiments, the tray 12 is slidably fixed to the frame 11 to provide sufficient operating space for placing or taking out the battery cell 2, improving the test efficiency and convenience. In one or more embodiments, slide rails are provided on the frame 11, and the tray 12 is slidably fixed within the slide rails. Based on Figure 1 the indicated orientation, the slide rails can be arranged to extend in the left-right direction or in the front-back direction. In one or more embodiments, a support plate 121 is provided on the top of the tray 12. The support plate 121 extends roughly horizontally. A plurality of receiving grooves spaced apart from each other are provided on the support plate 121, and each receiving groove allows a corresponding battery cell 2 to be constrained therein. The number of receiving grooves can be but is not limited to 4, 5, 6, etc. Through the above settings, one tray 12 can carry multiple battery cells 2, and multiple battery cells 2 can be detected simultaneously by cooperating with the corresponding thimble mechanism 13, thus greatly improving the efficiency of a single test. In addition, the tray 12 can also be arranged in multiple layers (such as upper, middle, and lower layers, etc.) in the vertical direction on the frame 11 to further improve the test efficiency.

[0031] As Figure 1 and Figure 2As shown, in one or more embodiments, the ejector pin mechanism 13 includes a mounting plate 131, a positive ejector pin 132a, and a negative ejector pin 132b. The positive ejector pin 132a and the negative ejector pin 132b can respectively form electrical connections with the positive electrode 22 and the negative electrode 23 of the battery cell 2. In one or more embodiments, the number of the ejector pin mechanisms 13 is multiple (such as 4, 5, 6, etc.), and each ejector pin mechanism 13 can be correspondingly matched with a battery cell 2 to be tested, so as to improve the single-test efficiency.

[0032] Figure 3 It is a schematic structural view of an embodiment of the mounting plate 131 in the test device 1 of the battery cell 2 of the present utility model. As Figure 3 shown, in one or more embodiments, the mounting plate 131 has a generally rectangular mounting plate body 1311. Alternatively, the mounting plate 131 can also be set to other suitable shapes, such as oval, etc. A plurality of ejector pin mounting holes 1312 spaced apart from each other are provided on the mounting plate 131. Among them, the positive ejector pin 132a can be selectively arranged in a corresponding one of the plurality of ejector pin mounting holes 1312, and the negative ejector pin 132b can be selectively arranged in a corresponding one of the plurality of ejector pin mounting holes 1312. Each ejector pin mounting hole 1312 can be set to a circular shape, a square shape, or other suitable shapes. The number of the ejector pin mounting holes 1312 is greater than or equal to 3. In one or more embodiments, three ejector pin mounting holes 1312 are arranged on the mounting plate 131 at intervals. These three ejector pin mounting holes 1312 are arranged at intervals substantially along the length direction of the mounting plate body 1311, and are respectively a first ejector pin mounting hole 13121, a second ejector pin mounting hole 13122, and a third ejector pin mounting hole 13123. Based on Figure 3 the shown orientation, the first ejector pin mounting hole 13121 and the second ejector pin mounting hole 13122 are arranged in sequence on the left side of the mounting plate body 1311, while the third ejector pin mounting hole 13123 is arranged on the right side of the mounting plate body 1311. Each ejector pin mounting hole 1312 allows the positive ejector pin 132a or the negative ejector pin 132b to be inserted therein. In this way, by selecting the ejector pin mounting holes 1312 at appropriate positions, the positive ejector pin 132a and the negative ejector pin 132b can not only form electrical connections with the positive electrode 22 and the negative electrode 23 on the battery cell 2, but also be matched with battery cells 2 of different specifications, so as to meet the test requirements of battery cells 2 of different specifications and improve the adaptability and versatility of the test device 1. Alternatively, the number of the ejector pin mounting holes 1312 is greater than or equal to 5 to better match battery cells 2 of different specifications. It should be noted that the arrangement positions of the ejector pin mounting holes 1312 can be adjusted according to actual needs to meet the test requirements of battery cells of different specifications.

[0033] As Figure 3As shown, in one or more embodiments, a lifting connection hole 1313 is provided in the middle of the mounting plate 131. The lifting connection hole 1313 can be connected to the lifting mechanism 14 in the test device 1 (see Figure 1 and Figure 2 ), so that the entire mounting plate 131 is fixedly mounted on the frame 11 in a liftable manner.

[0034] As Figure 3 shown, in one or more embodiments, a guiding hole 1314 is provided in the mounting plate 131. The guiding hole 1314 allows the guiding rod 15 in the test device 1 to be inserted therein, thereby improving the stability of the mounting plate 131 during the lifting process. In one or more embodiments, the guiding hole 1314 includes a first guiding hole 13141 and a second guiding hole 13142 respectively arranged at opposite ends of the mounting plate 131. Based on Figure 3 the orientation shown, the first guiding hole 13141 is arranged at the left end of the mounting plate 131, while the second guiding hole 13142 is arranged at the right end of the mounting plate 131. A plurality of thimble mounting holes 1312 are located between the first guiding hole 13141 and the second guiding hole 13142. Through the above settings, the force on the mounting plate 131 can be made more uniform, improving the smoothness of its lifting process.

[0035] Figure 4 is a schematic structural diagram of an embodiment of the thimble in the test device 1 of the electric core 2 of the present utility model. In one or more embodiments, each of the positive thimble 132a and the negative thimble 132b includes components such as an outer cylinder 1321, an inner cylinder 1322, and a contact piece 1323. Among them, the outer cylinder 1321 has a generally cylindrical shape. The outer cylinder 1321 is fixed on the mounting plate 131 and is positioned in the corresponding thimble mounting hole 1312. In one or more embodiments, a fixing plate 1324 extending radially outward along the circumferential wall is provided on the outer cylinder 1321. The fixing plate 1324 forms a fixed connection with the mounting plate 131. The fixing methods include but are not limited to screwing, clamping, etc. Alternatively, the outer cylinder 1321 and the mounting plate 131 can also be connected by other suitable means. For example, an external thread is provided on the circumferential wall of the outer cylinder 1321, and an internal thread matching the external thread is provided in the thimble mounting hole 1312 of the mounting plate 131. The inner cylinder 1322 can be movably fixed in the outer cylinder 1321. Based on Figure 4 the orientation shown, the inner cylinder 1322 can rise or fall relative to the outer cylinder 1321. The contact piece 1323 is arranged at one end of the inner cylinder 1322. Specifically, the contact piece 1323 is arranged at one end of the inner cylinder 1322 extending out of the outer cylinder 1321 (based on Figure 4The indicated orientation, i.e., the lower end). The abutting piece 1323 can abut against the corresponding positive electrode 22 or negative electrode 23 in the battery cell 2. It should be noted that the outer cylinder 1321, the inner cylinder 1322, and the abutting piece 1323 can be processed from a suitable resin material to have good insulation. Appropriate wires (not marked in the figure) are provided inside the outer cylinder 1321, the inner cylinder 1322, and the abutting piece 1323. When the abutting piece 1323 abuts against the positive electrode 22 or negative electrode 23 of the battery cell 2, one end of the wire can form an electrical connection with the positive electrode 22 or negative electrode 23, and the other end can be connected to an external charging and discharging device or resistance testing device, etc., so as to conveniently test the performance of the battery cell 2.

[0036] As Figure 4 shown, in one or more embodiments, a telescopic spring 1325 is further sleeved on the inner cylinder 1322, and the telescopic spring 1325 is telescopically arranged between the abutting piece 1323 and the mounting plate 131. Based on Figure 4 the indicated orientation, the telescopic spring 1325 has opposite upper and lower ends (not marked in the figure). Among them, the upper end is connected to the fixed piece close to the mounting plate 131, and the lower end is connected to the abutting piece 1323. Through the above settings, when the inner cylinder 1322 rises or falls relative to the outer cylinder 1321, the telescopic spring 1325 will contract or stretch accordingly, so that the abutting piece 1323 can form a reliable flexible connection with the positive electrode 22 and negative electrode 23 of the battery cell 2.

[0037] As Figure 1 and Figure 2 shown, in one or more embodiments, the testing device 1 of the present utility model further includes a lifting mechanism 14. The lifting mechanism 14 is fixed on the frame 11 and is connected to the mounting plate 131. The lifting mechanism 14 is configured to drive the mounting plate 131 to rise or fall relative to the frame 11, so as to flexibly adjust the distance between the thimble (including the positive thimble 132a and the negative thimble 132b) and the electrodes (including the positive electrode 22 and the negative electrode 23) of the battery cell 2. In one or more embodiments, the lifting mechanism 14 is a manual screw 141 lift. The manual screw 141 lift includes components such as a screw 141 extending substantially in the vertical direction and a control handle 142 for controlling the rotation of the screw 141 around its central axis. One end of the screw 141 is fixed on the lifting connection hole 1313 of the mounting plate 131. By driving the control handle 142, the forward or reverse rotation of the screw 141 can be controlled, so that the mounting plate 131 rises or falls relative to the frame 11. Alternatively, the lifting mechanism 14 can also adopt other suitable structures, such as an electric screw 141 lift, a pneumatic screw 141 lift, or a hydraulic screw 141 lift, to enrich the types of products and meet the differentiated design needs.

[0038] As Figure 2As shown, in one or more embodiments, the test device 1 of the present utility model further includes a guide rod 15. The guide rod 15 extends substantially in the vertical direction. One end of the guide rod 15 is fixed on the frame 11 (for example, on the top plate of the frame 11), and the other end extends through the guide hole 1314 in the mounting plate 131. A movable connection is formed between the guide rod 15 and the guide hole 1314. The guide rod 15 can move relative to the guide hole 1314, rather than being fixedly connected. The setting of the guide rod 15 can keep the mounting plate 131 in good stability during the lifting process, ensuring that the thimble can accurately abut against the electrode on the battery cell 2. In one or more embodiments, the guide rod 15 includes a first guide rod 151 and a second guide rod 152 spaced apart from each other. The first guide rod 151 can be inserted into the corresponding first guide hole 13141 on the mounting plate 131, and the second guide rod 152 can be inserted into the corresponding second guide hole 13142 on the mounting plate 131. In this way, the force on the mounting plate 131 can be more uniform, improving the smoothness of its lifting process. Alternatively, the number of guide rods 15 can also be set to other suitable numbers more or less than 2, such as 1, 3, etc.

[0039] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present utility model.

Claims

1. A test device for an electric cell, characterized in that, The test device includes: A frame; A tray, which is fixed on the frame and is adapted to carry the battery cell to be tested; A thimble mechanism, which includes a mounting plate, a positive thimble and a negative thimble. The mounting plate is fixed on the frame, and a plurality of thimble mounting holes spaced apart from each other are provided on the mounting plate. Wherein, each of the positive thimble and the negative thimble is selectively arranged in a corresponding one of the plurality of thimble mounting holes so as to be able to form electrical connections with the positive electrode and the negative electrode of the battery cell respectively.

2. The test device for the battery cell according to claim 1, wherein The number of the thimble mounting holes is greater than or equal to 3.

3. The testing device for the battery cell according to claim 1, characterized in that, The tray is slidably fixed on the frame.

4. The test device for a battery cell according to claim 1, wherein A support plate is provided on the top of the tray, and a plurality of receiving grooves spaced apart from each other are provided on the support plate. Each of the receiving grooves is adapted to confine a corresponding battery cell therein; And the thimble mechanism is respectively matched with each battery cell.

5. The test device for the battery cell according to claim 1, characterized in that The test device further includes: A lifting mechanism, which is fixed on the frame and is connected to the mounting plate, and the lifting mechanism is configured to be able to drive the mounting plate to rise or fall relative to the frame.

6. The test device for the battery cell according to claim 5, characterized in that, The lifting mechanism is a manual screw jack, an electric screw jack, a pneumatic screw jack or a hydraulic screw jack.

7. The testing device for the battery cell according to claim 1, characterized in that, A guide rod is provided on the frame, and a guide hole allowing the guide rod to be inserted therein is provided on the mounting plate.

8. The test device for the battery cell according to claim 7, wherein, The guide hole includes a first guide hole and a second guide hole respectively arranged at opposite ends of the mounting plate, and the plurality of thimble mounting holes are located between the first guide hole and the second guide hole.

9. The test device for the battery cell according to claim 1, wherein, Each of the positive thimble and the negative thimble includes: An outer cylinder, which is fixed on the mounting plate and is located in the corresponding thimble mounting hole; An inner cylinder, which is movably arranged in the outer cylinder; and A contact piece, which is arranged at one end of the inner cylinder and can be in contact with the corresponding positive electrode or negative electrode.

10. The test device for the battery cell according to claim 9, characterized in that, A telescopic spring is sleeved on the inner cylinder, and the telescopic spring is telescopically arranged between the contact piece and the mounting plate.

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