Battery cell detection device

Abstract

The utility model discloses a battery cell detection device, and belongs to the technical field of battery detection. The battery cell detection device comprises a workbench and a detection tool, the detection tool comprises a base, an adjusting seat, a locking piece and a clamp, and the base is rotatably arranged on the workbench around a first axis; the adjusting seat is rotatably arranged on the base around a second axis, and the second axis is perpendicular to the first axis; the locking piece is arranged between the adjusting seat and the base and can lock or unlock the adjusting seat and the base; the clamp is arranged on the adjusting seat and is used for clamping the battery cell; the battery cell can be clamped on the clamp, and the adjusting seat and the base are unlocked through the locking piece, so that the adjusting seat can rotate relative to the base so as to adjust the inclination angle of the battery cell; the adjusting seat and the base are locked through the locking piece, so that the battery cell can be kept at the angle; by rotating the base, the battery cell can be driven to rotate, 360-degree dead-angle-free detection can be performed on the battery cell, and the posture of the battery cell is adjusted, so that the battery cell detection precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a battery cell testing device. Background Technology

[0002] A battery consists of a casing, battery cells, and protection circuitry housed within the casing. As a crucial component of the battery, the quality of the battery cells directly determines the overall quality and safety performance of the battery.

[0003] During the battery cell production process, quality inspection of the battery cells is required. In the existing technology, the battery cells are usually held by a fixture and inspected by a testing mechanism. However, the existing battery cell fixtures cannot adjust the posture of the battery cells, resulting in low inspection accuracy and failing to meet user needs. Utility Model Content

[0004] The purpose of this invention is to provide a battery cell testing device that can not only clamp the battery cell but also adjust its posture, thereby improving testing accuracy.

[0005] To achieve the above objectives, the following technical solution is provided:

[0006] The battery cell testing device includes a workbench and testing fixtures, wherein the testing fixtures include:

[0007] A base, which is rotatably disposed on the worktable about a first axis;

[0008] An adjusting seat is rotatably disposed on the base about a second axis, the second axis being perpendicular to the first axis;

[0009] A locking element, which can lock or unlock the adjusting seat from the base;

[0010] A clamp is provided on the adjustment seat and is used to hold the battery cell.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model discloses a battery cell testing device that can clamp the battery cell in a fixture, unlock the adjusting seat from the base by using a locking member, and allow the adjusting seat to rotate relative to the base to adjust the tilt angle of the battery cell; locking the adjusting seat from the base by using a locking member will keep the battery cell at that angle; rotating the base will drive the battery cell to rotate, which not only enables 360° detection of the battery cell without blind spots, but also allows adjustment of the battery cell's posture to improve the accuracy of battery cell detection. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the first structure of the battery cell detection device and the battery cell in an embodiment of this utility model;

[0014] Figure 2 This is a schematic diagram of the second structure of the battery cell detection device and the battery cell in an embodiment of this utility model;

[0015] Figure 3 This is a schematic diagram of the third structure of the battery cell detection device and the battery cell in an embodiment of this utility model;

[0016] Figure 4 This is a schematic diagram of the fourth structure of the battery cell detection device and the battery cell in an embodiment of this utility model;

[0017] Figure 5 This is a first structural schematic diagram of the battery cell testing device in an embodiment of this utility model;

[0018] Figure 6 This is a schematic diagram of the second structure of the battery cell testing device in an embodiment of this utility model.

[0019] Figure label:

[0020] 100. Battery cell; 101. First side; 1. Base; 2. Adjustment seat; 21. Long hole; 3. Locking component; 31. Connecting shaft; 32. Limiting part; 33. Holding part; 4. Clamp; 41. Clamping seat; 411. Clamping groove; 4111. First inclined surface; 4112. Clamping inner wall; 42. Clamping block; 421. Second inclined surface; 422. Second side; 41a. First seat body; 41a1. First U-shaped groove; 41a11. Groove bottom wall one; 41a12. Opening end face one; 41b. Second seat body; 41b1. Second U-shaped groove; 41b11. Groove bottom wall two; 41b12. Opening end face two; 41b13. Side notch; 41b14. Bottom notch; 51. First flexible pad; 52. Second flexible pad; 6. Rotating shaft. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] like Figures 1 to 6As shown, this embodiment provides a battery cell testing device, including a worktable and a testing fixture. The testing fixture includes a base 1, an adjusting seat 2, a locking member 3, and a clamp 4. The base 1 is rotatably mounted on the worktable about a first axis; the adjusting seat 2 is rotatably mounted on the base 1 about a second axis, which is perpendicular to the first axis; the locking member 3 can lock or unlock the adjusting seat 2 from the base 1; the clamp 4 is mounted on the adjusting seat 2 and is used to clamp the battery cell 100. In other embodiments, the clamp 4 of the battery cell testing device can also be used to clamp a battery for testing.

[0029] The battery cell testing device of this embodiment can clamp the battery cell 100 in the fixture 4. By unlocking the adjusting seat 2 from the base 1 through the locking member 3, the adjusting seat 2 can rotate relative to the base 1 to adjust the tilt angle of the battery cell 100. By locking the adjusting seat 2 from the base 1 through the locking member 3, the battery cell 100 can be kept at that angle. By rotating the base 1, the battery cell 100 can be rotated. This not only enables 360° detection of the battery cell 100 without blind spots, but also allows adjustment of the battery cell 100's posture to improve the detection accuracy of the battery cell 100.

[0030] Optionally, such as Figures 1 to 4 As shown, the clamp 4 includes a clamp base 41 and a clamping block 42. The clamp base 41 is provided with a clamping groove 411 for placing the battery cell 100. The clamping block 42 can be inserted into the clamping groove 411. A guide structure is provided between the clamping block 42 and the clamp base 41. The guide structure can guide the clamping block 42 to be inserted into the clamping groove 411 and move the clamping block 42 in a direction parallel to the second axis and press against the battery cell 100. This allows the clamp 4 to clamp different types of battery cells 100, improving the versatility of the clamp 4.

[0031] It should be noted that when clamping the battery cell 100, the tabs on both sides and the sides of the battery cell 100 should not be clamped to avoid damage to the tabs or electrode sheets. Preferably, the clamping block 42 abuts against the large surface of the battery cell 100 (i.e., the outer surface with the largest area among the multiple outer surfaces of the battery cell 100).

[0032] Optionally, the contact area between the clamping block 42 and the battery cell 100 is s, and the large surface area of ​​the battery cell 100 is S, where 26%S≤s≤49%S. This ensures that the contact area between the clamping block 42 and the battery cell 100 is sufficiently large, preventing mutual displacement between the clamping block 42 and the outer membrane of the battery cell 100, thus avoiding damage to the battery cell 100 caused by pulling the membrane. For example, s can be any value between 26%S and 49%S, such as 26%S, 27%S, 28%S, 29%S, 30%S, 31%S, 32%S, 33%S, 34%S, 35%S, 36%S, 37%S, 38%S, 39%S, 40%S, 41%S, 42%S, 43%S, 44%S, 45%S, 46%S, 47%S, 48%S, or 49%S.

[0033] It should be noted that one or more clamping blocks 42 can be provided. When multiple clamping blocks 42 are provided, the total contact area between the multiple clamping blocks 42 and the battery cell 100 is not less than 26%-49% of the large surface area of ​​the battery cell 100.

[0034] Optionally, the guide structure includes a first inclined surface 4111 and a second inclined surface 421 abutting against the first inclined surface 4111, the second inclined surface 421 being disposed on the clamping block 42; the clamping groove 411 includes two inner walls disposed opposite to each other, the first inclined surface 4111 being disposed on one of the two inner walls; along the direction in which the clamping block 42 is inserted into the clamping groove 411, the distance between the first inclined surface 4111 and the other of the two inner walls gradually decreases, that is, the first inclined surface 4111 extends inclinedly towards the other of the two inner walls along the direction in which the clamping block 42 is inserted into the clamping groove 411. Specifically, the clamping block 42 is a wedge-shaped structure. When the clamping block 42 moves on the first inclined surface 4111, on the one hand, the clamping block 42 gradually inserts into the clamping groove 411, and on the other hand, the clamping block 42 can also move in a direction parallel to the second axis to approach and abut against the battery cell 100, so as to press the battery cell 100 against the other of the two inner walls of the clamping groove 411. When the clamping block 42 moves on the first inclined surface 4111 and is pulled out of the clamping groove 411, the clamping block 42 can also move in a direction parallel to the second axis to separate from the battery cell 100, thereby facilitating the installation and removal of the battery cell 100. By making the first inclined surface 4111 abut against the second inclined surface 421, the stability of the clamping block 42 when clamping the battery cell 100 can also be improved, thereby improving the stability of the battery cell 100 clamping and preventing the battery cell 100 from shifting during rotation and affecting the detection accuracy.

[0035] Optionally, the clamping groove 411 is a U-shaped groove, and the guiding structure can guide the clamping block 42 to enter and exit the U-shaped groove along the through direction of the U-shaped groove. It should be noted that the through direction of the U-shaped groove is perpendicular to the opening direction of the U-shaped groove. With this configuration, when the clamping block 42 is inserted into the clamping groove 411 after the battery cell 100 is placed in the clamping groove 411, it can be prevented from being damaged by the battery cell 100 hitting the inner wall of the clamping groove 411 as the clamping block 42 moves, thus protecting the battery cell 100.

[0036] Optionally, such as Figure 5 and Figure 6As shown, the clamping base 41 includes a first base body 41a and a second base body 41b. The first base body 41a is located on the adjusting base 2 and has a first U-shaped groove 41a1. The second base body 41b is located on the first base body 41a and has a second U-shaped groove 41b1 corresponding to the first U-shaped groove 41a1. The second U-shaped groove 41b1 communicates with the first U-shaped groove 41a1 to form a clamping groove 411. A clamping block 42 is located in the second U-shaped groove 41b1. That is, the battery cell 100 is fixed in the second U-shaped groove 41b1 by the clamping block 42, while the end of the battery cell 100 may extend into the first U-shaped groove 41a1. The first U-shaped groove 41a1 mainly serves to avoid collisions and damage to the battery cell 100.

[0037] In this embodiment, both the bottom wall 41a11 of the first U-shaped groove 41a1 and the bottom wall 41b11 of the second U-shaped groove 41b1 are planar, which not only makes them easy to process but also improves the stability of the battery cell 100 clamping by having the battery cell 100 abut against the bottom wall 41b11 of the second U-shaped groove 41b1 with a planar structure.

[0038] Furthermore, the bottom wall 41b11 of the second U-shaped groove 41b1 is set at an angle to the bottom wall 41a11 of the first U-shaped groove 41a1. Therefore, when the battery cell 100 is placed in the second U-shaped groove 41b1, the battery cell 100 can be tilted relative to the first base 41a. That is, without rotating the adjusting base 2, the battery cell 100 can be tilted and clamped in the clamp 4, which simplifies the steps of rotating and adjusting the adjusting base 2. Furthermore, the opening end face 41b12 of the second U-shaped groove 41b1 is set at an angle to the opening end face 41a12 of the first U-shaped groove 41a1. This facilitates the installation and removal of the battery cell 100 and reduces the risk of collision between the battery cell 100 and the opening of the second U-shaped groove 41b1. As an alternative, it can also be configured such that the bottom wall 41b11 of the second U-shaped groove 41b1 is set at an angle to the bottom wall 41a11 of the first U-shaped groove 41a1; or, the opening end face 41b12 of the second U-shaped groove 41b1 is set at an angle to the opening end face 41a12 of the first U-shaped groove 41a1.

[0039] It should be noted that, in this embodiment, the included angle between the bottom wall 41b11 of the second U-shaped groove 41b1 and the bottom wall 41a11 of the first U-shaped groove 41a1, and the included angle between the opening end face 41b12 of the second U-shaped groove 41b1 and the opening end face 41a12 of the first U-shaped groove 41a1, are not limited in value. For example, the included angle between the bottom wall 41b11 of the second U-shaped groove 41b1 and the bottom wall 41a11 of the first U-shaped groove 41a1, and the included angle between the opening end face 41b12 of the second U-shaped groove 41b1 and the opening end face 41a12 of the first U-shaped groove 41a1, are equal.

[0040] Optionally, the included angle between the bottom wall 41b11 of the second U-shaped groove 41b1 and the bottom wall 41a11 of the first U-shaped groove 41a1 is in the range of 10°-14°. Therefore, in this embodiment, when the cell detection device cooperates with the CT equipment to scan the cell 100, lateral artifacts can be eliminated, and the clarity of the scan results can be improved. For example, the included angle between the bottom wall 41b11 of the second U-shaped groove 41b1 and the bottom wall 41a11 of the first U-shaped groove 41a1 can be any value between 10° and 14°, such as 10°, 11°, 12°, 13°, or 14°.

[0041] Optionally, the second body 41b is made of carbon fiber. Exemplarily, the second body 41b is fabricated from carbon fiber using a 3D printing process. Alternatively, the second body 41b can be made of low-density plastic (such as polyetheretherketone, PEEK). This ensures that it does not affect X-ray penetration when used with CT equipment, thus improving the clarity of the scan results.

[0042] It is understood that the U-shaped groove structure includes an opening, a bottom wall opposite to the opening, and two side walls connected to both sides of the bottom wall respectively. In other words, the two side walls are arranged opposite to each other.

[0043] In this embodiment, the clamping groove 411 includes a clamping inner wall 4112, and the clamping inner wall 4112 and the clamping block 42 are respectively located on opposite sides of the battery cell 100. Specifically, one of the two groove sidewalls is the clamping inner wall 4112, and the other is provided with a first inclined surface 4111. After the battery cell 100 is placed in the clamping groove 411 and the clamping block 42 is inserted into the clamping groove 411, the battery cell 100 can be pressed against the clamping inner wall 4112 by the clamping block 42, thereby fixing the battery cell 100 in the clamping groove 411. As an alternative, it can also be configured such that both groove sidewalls are provided with a first inclined surface 4111, and both groove sidewalls are provided with clamping blocks 42. In other words, the battery cell 100 is clamped and fixed by the two clamping blocks 42 pressing against the opposite sides of the battery cell 100.

[0044] Optionally, such as Figure 2 As shown, the clamping inner wall 4112 is provided with a first flexible pad 51, which can play a buffering role and prevent the clamping inner wall 4112 from excessively squeezing the battery cell 100 and causing damage to the battery cell 100.

[0045] Optionally, a second flexible pad 52 is provided on the side of the clamping block 42 that abuts against the battery cell 100, so that the second flexible pad 52 can play a buffering role and prevent the clamping block 42 from excessively squeezing the battery cell 100 and causing damage to the battery cell 100.

[0046] For example, the first flexible pad 51 is a silicone pad; the second flexible pad 52 is a silicone pad.

[0047] Optionally, such as Figure 4 As shown, the second seat 41b includes a side notch 41b13 formed in the side wall of the second U-shaped groove 41b1. Further, when the side notch 41b13 is formed in the side wall of the groove with the first inclined surface 4111, clamping blocks 42 are provided on both sides of the side notch 41b13 along the through direction of the second U-shaped groove 41b1. This reduces the contact area between the clamping blocks 42 and the battery cell 100 while ensuring the battery cell 100 is firmly fixed, thereby reducing the risk of damage caused by collision between the battery cell 100 and the clamping blocks 42. When the side notch 41b13 is formed in the clamping inner wall 4112, the side notch 41b13 reduces the contact area between the clamping inner wall 4112 and the battery cell 100, thereby reducing the risk of damage caused by collision between the battery cell 100 and the clamping inner wall 4112.

[0048] Optionally, the side notch 41b13 is provided through the thickness direction of the sidewall of the second U-shaped groove 41b1, thereby reducing the material used in the clamp 41, reducing costs, and achieving weight reduction.

[0049] Optionally, the second base 41b includes a bottom notch 41b14 formed in the bottom wall 41b11 of the second U-shaped groove 41b1, which can reduce the contact area between the bottom wall 41b11 and the battery cell 100 and reduce the risk of damage to the battery cell 100 due to collision with the bottom wall 41b11.

[0050] Optionally, the bottom notch 41b14 is provided through the thickness direction of the bottom wall of the second U-shaped groove 41b1, thereby reducing the material used in the clamp 41, reducing costs, and achieving lightweighting.

[0051] In this embodiment, the side notch 41b13 and the bottom notch 41b14 are connected to form a notch.

[0052] Optionally, such as Figure 1As shown, the locking component 3 includes a connecting shaft 31 and a limiting part 32. One end of the connecting shaft 31 is threadedly connected to the base 1; the limiting part 32 is fixed to the other end of the connecting shaft 31. Along the axial direction of the connecting shaft 31, the limiting part 32 and the base 1 respectively abut against the two sides of the adjusting seat 2. By rotating the connecting shaft 31, the limiting part 32 can be pressed against the base 1, thereby locking the adjusting seat 2 and the base 1; by rotating the connecting shaft 31 in the opposite direction, the limiting part 32 can be separated from the adjusting seat 2, thereby unlocking the adjusting seat 2 from the base 1. The adjusting seat 2 can be rotated relative to the base 1 to adjust the tilt angle of the battery cell 100. This design is not only convenient to operate, but also simple in structure and low in cost.

[0053] Optionally, the locking member 3 also includes a gripping part 33, which is fixed to the limiting part 32, thereby facilitating the operator to hold the gripping part 33 to rotate the connecting shaft 31 and improving the ease of operation.

[0054] Optionally, the adjusting seat 2 is rotatably connected to the base 1 via a rotating shaft 6, the axis of which is a second axis; the connecting shaft 31 is arranged parallel to the rotating shaft 6; the adjusting seat 2 has an elongated hole 21, and the connecting shaft 31 passes through the elongated hole 21. Loosening the locking member 3 unlocks the adjusting seat 2 from the base 1, allowing the adjusting seat 2 to rotate around the rotating shaft 6, and thus rotate relative to the base 1 to adjust the tilt angle of the battery cell 100. At this time, the connecting shaft 31 can move within the elongated hole 21 without interfering with the rotation of the adjusting seat 2. The rotating shaft 6 provides support for the adjusting seat 2, which helps improve the stability of the adjusting seat 2 during adjustment and fixation.

[0055] Optionally, the base 1 is provided with an angle scale for measuring the rotation angle of the adjustment seat 2. For example, the adjustment seat 2 is provided with a pointer that corresponds to the angle scale. After the adjustment seat 2 is adjusted to a suitable angle, the angle pointed to by the pointer is the tilt angle of the battery cell 100 relative to the horizontal plane, which makes it easier to quickly determine the tilt angle of the battery cell 100 and improves the convenience of operation.

[0056] In this embodiment, the base 1 is a disc-shaped structure, and the axis of the disc-shaped structure is the first axis. Furthermore, the adjustment seat 2 is located at the center of the disc-shaped structure.

[0057] For example, the working principle of the battery cell detection device in this embodiment when it cooperates with a CT scanner to scan the battery cell 100 is as follows:

[0058] The battery cell 100 is placed in the second U-shaped groove 41b1 and abuts against the bottom wall 41b11 of the second U-shaped groove 41b1. Then, along the through direction of the second U-shaped groove 41b1, the clamping block 42 is inserted into the second U-shaped groove 41b1. Under the guidance of the first inclined surface 4111, the clamping block 42 moves in a direction parallel to the second axis and gradually presses against the battery cell 100 to press the battery cell 100 against the first flexible pad 51 on the clamping inner wall 4112, thereby achieving the clamping and fixing of the battery cell 100. Then, loosen the locking piece 3 and rotate the adjusting seat 2 around the second axis to adjust the tilt angle of the battery cell 100. Different models of battery cells 100 need to be tilted at different angles. The different tilt angles are to ensure that one of the diagonals of the battery cell 100 is approximately aligned with the first axis (so that one of the diagonals of the battery cell 100 is approximately aligned with the first axis, which is beneficial to ensure that different models of battery cells 100 can be within the scanning range of the CT equipment, which is beneficial to improving the scanning clarity).

[0059] After adjusting the angle of the battery cell 100 to the appropriate position, lock the adjusting seat 2 to the base 1 using the locking component 3. Finally, rotate the base 1 to perform a 360° inspection of the battery cell 100 without any blind spots.

[0060] It should be noted that when testing battery cells 100 of the same model, when clamping the first battery cell 100 of that model, simply adjust the angle of the adjusting seat 2 so that one diagonal of the battery cell 100 roughly coincides with the first axis. When testing the next battery cell 100 of the same model, simply keep the contact position between the clamping block 42 and the battery cell 100 unchanged, and insert the clamping block 42 into the clamping groove 411, so that one diagonal of the battery cell 100 roughly coincides with the first axis. Specifically, in this embodiment, the first side 101 of the battery cell 100 is made flush with the second side 422 of the clamping block 42 (the first side 101 is the side of the battery cell 100 away from the base 1 along the through direction of the second U-shaped groove 41b1, and the second side 422 is the side of the clamping block 42 located on the same side as the first side 101). This ensures that the contact position between the clamping block 42 and each battery cell 100 of this model remains unchanged, thereby improving the ease of operation.

[0061] To improve testing efficiency, multiple battery cells 100 can be clamped in the fixture 4 at the same time, and PU (polyurethane) gaskets can be placed between two adjacent battery cells 100 to test multiple battery cells 100 at the same time.

[0062] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery cell testing device, characterized in that, It includes a workbench and a testing fixture, wherein the testing fixture includes: A base, which is rotatably disposed on the worktable about a first axis; An adjusting seat is rotatably disposed on the base about a second axis, the second axis being perpendicular to the first axis; A locking element, which can lock or unlock the adjusting seat from the base; A clamp is provided on the adjustment seat and is used to clamp the battery cell.

2. The cell testing device according to claim 1, characterized in that, The clamp includes: A clamping base, wherein the clamping base is provided with a clamping groove for placing the battery cell; A clamping block is provided, which can be inserted into the clamping groove. A guide structure is provided between the clamping block and the clamping seat. The guide structure can guide the clamping block to be inserted into the clamping groove and move the clamping block in a direction parallel to the second axis and press against the battery cell.

3. The cell testing device according to claim 2, characterized in that, The contact area between the clamp and the battery cell is s, and the large surface area of ​​the battery cell is S, where 26%S≤s≤49%S.

4. The cell testing device according to claim 2, characterized in that, The guide structure includes a first inclined surface and a second inclined surface that abuts against the first inclined surface, the second inclined surface being disposed on the clamping block; the clamping groove includes two inner walls disposed opposite to each other, the first inclined surface being disposed on one of the two inner walls; along the direction in which the clamping block is inserted into the clamping groove, the distance between the first inclined surface and the other of the two inner walls gradually decreases; And / or, the clamping groove is a U-shaped groove, and the guiding structure can guide the clamping block to enter and exit the U-shaped groove along the through direction of the U-shaped groove.

5. The cell testing device according to claim 2, characterized in that, The clamping groove includes a clamping inner wall, and the clamping inner wall and the clamping block are respectively located on opposite sides of the battery cell; The clamping inner wall is provided with a first flexible pad; And / or, a second flexible pad is provided on the side of the clamp that abuts against the battery cell.

6. The cell testing device according to claim 2, characterized in that, The clamp includes: A first seat body is disposed on the adjustment seat, and the first seat body is provided with a first U-shaped groove; The second seat is disposed on the first seat. The second seat is provided with a second U-shaped groove corresponding to the first U-shaped groove. The second U-shaped groove communicates with the first U-shaped groove and forms the clamping groove. The clamping block is disposed in the second U-shaped groove. The second bottom wall of the second U-shaped groove is set at an angle to the first bottom wall of the first U-shaped groove; and / or, the second opening end face of the second U-shaped groove is set at an angle to the first opening end face of the first U-shaped groove.

7. The cell testing device according to claim 6, characterized in that, The second seat includes a side notch formed in the sidewall of the second U-shaped groove; And / or, the second seat includes a bottom notch formed in the bottom wall of the second U-shaped groove.

8. The cell testing device according to claim 7, characterized in that, The clamping blocks are provided on both sides of the side notch along the through direction of the second U-shaped groove.

9. The cell testing device according to any one of claims 1-8, characterized in that, The locking element includes: A connecting shaft, one end of which is threadedly connected to the base; A limiting part is fixed to the other end of the connecting shaft, and the limiting part can abut against the base on both sides of the adjusting seat along the axial direction of the connecting shaft.

10. The cell testing device according to claim 9, characterized in that, The adjusting seat is rotatably connected to the base via a rotating shaft, the axis of which is the second axis; the connecting shaft is arranged parallel to the rotating shaft. The adjusting seat has an elongated hole, and the connecting shaft passes through the elongated hole.

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