Cylindrical battery cell testing equipment

Abstract

The utility model provides a cylindrical cell test equipment, including work platform, support subassembly, baffle plate and extrusion subassembly, support subassembly and work platform fixed connection, support subassembly has the support surface of arc structure, baffle plate and work platform or support subassembly movable connection, baffle plate has the spacing surface of arc structure, and extrusion subassembly is equipped with the spacing surface of arc structure. A containing space used for containing a to-be-tested cell is formed between the limiting face and the supporting face, and the extruding assembly can achieve testing of the failure invasion amount of the to-be-tested cell by extruding the baffle. The supporting surface and the limiting surface are both of an arc-shaped structure, and the surfaces of the supporting surface and the limiting surface can be in full contact with the surface of the to-be-tested battery cell, so that the to-be-tested battery cell is effectively fixed in the accommodating space, the test error of the to-be-tested battery cell is reduced, and the accuracy of a test result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a cylindrical battery cell testing device. Background Art

[0002] With the improvement of the energy density of new energy power batteries, large cylindrical battery cells that can cope with high specific energy systems and adapt to modular grouping have become an important direction for the future development of power batteries. In the safety test of a power battery pack, in order to simulate the side collision condition, it is necessary to introduce a whole-pack extrusion test at the battery pack level to judge whether the mechanical structure strength of the battery pack can meet the requirements.

[0003] In order to reduce the R & D cost, it is usually necessary to simulate and calculate the whole-pack extrusion test in simulation. By comparing the intrusion amount of the battery cell in the simulation with the intrusion amount of the conventional single battery cell when it fails under extrusion, it is judged whether the design of the battery pack can pass the extrusion test.

[0004] However, due to the special circular contour design of the cylindrical battery cell, its constraint form and stress condition in the whole pack are significantly different from those of the conventional single battery cell; introducing the intrusion amount of the conventional single battery cell when it fails under extrusion into the whole-pack extrusion simulation calculation will cause a large judgment error and affect the accuracy of the test results. Summary of the Utility Model

[0005] In view of this, the utility model provides a cylindrical battery cell testing device to at least solve the problem that the current testing error of cylindrical battery cells is relatively large, affecting the accuracy of the test results.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] The utility model provides a cylindrical battery cell testing device, including: an operation platform; a support assembly connected to the operation platform, the support assembly having a support surface with an arc structure; a baffle movably connected to the operation platform or the support assembly, the baffle having a limiting surface with an arc structure, and a receiving space for accommodating a battery cell to be tested is formed between the limiting surface and the support surface; an extrusion assembly connected to the operation platform, and the extrusion assembly is used to extrude the baffle to test the intrusion amount when the battery cell to be tested fails.

[0008] Optionally, the support assembly includes: a seat body; a support portion provided on the seat body, and the support surface is provided on the support portion.

[0009] Optionally, the support portion includes at least two support columns, the at least two support columns are arranged in parallel, and the surface of each support column facing the baffle forms the support surface.

[0010] Optionally, a connection surface is formed on the surface of each of the support columns facing away from the baffle, and the support columns are detachably connected to the base body through the connection surface.

[0011] Optionally, the baffle includes: a limiting portion, and the limiting surface is provided on the limiting portion; a connecting portion provided on at least one side of the limiting portion, and the connecting portion is movably connected to the base body.

[0012] Optionally, at least two limiting grooves are provided on the limiting portion, the at least two limiting grooves are arranged side by side, and the groove walls of each of the limiting grooves form the limiting surface.

[0013] Optionally, a clamping groove is provided at each of the opposite ends of the base body, and the connecting portion is movably clamped in the clamping groove.

[0014] Optionally, the surface of the limiting portion close to the supporting portion protrudes from the surface of the connecting portion.

[0015] Optionally, a hoisting portion is provided on the base body, and the hoisting portion is used to hoist the support assembly.

[0016] Optionally, the pressing assembly includes a driving mechanism, a push rod and a pressing head; the driving mechanism is connected to the push rod, the push rod is connected to the pressing head, and the driving mechanism drives the pressing head to move through the push rod so that the pressing head presses the baffle.

[0017] Compared with the prior art, the cylindrical battery cell testing device of the present invention has the following advantages:

[0018] The testing device of the embodiment of the present invention includes an operation platform, a support assembly, a baffle and a pressing assembly. The support assembly has a support surface with an arc-shaped structure, and the baffle has a limiting surface with an arc-shaped structure. A placement space for accommodating a battery cell to be tested is formed between the limiting surface and the support surface. The pressing assembly can test the failure intrusion amount of the battery cell to be tested by pressing the baffle. Since both the support surface and the limiting surface are of arc-shaped structures, their surfaces can be in full contact with the surface of the battery cell to be tested, so that the battery cell to be tested is effectively fixed in the placement space, thereby helping to reduce the testing error of the battery cell to be tested and improving the accuracy of the test result. Description of the Drawings

[0019] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of a cylindrical battery cell testing device in an embodiment of the present invention;

[0021] Figure 2 It is a front-side schematic view of a seat body in an embodiment of the present utility model;

[0022] Figure 3 It is a back-side schematic view of a seat body in an embodiment of the present utility model;

[0023] Figure 4 It is a front-side schematic view of a support part in an embodiment of the present utility model;

[0024] Figure 5 It is a back-side schematic view of a support part in an embodiment of the present utility model;

[0025] Figure 6 It is a schematic view of a baffle in an embodiment of the present utility model;

[0026] Figure 7 It is a schematic view of an extrusion assembly in an embodiment of the present utility model;

[0027] Figure 8 It is a schematic view of an operation platform in an embodiment of the present utility model;

[0028] Figure 9 It is a schematic view of a battery cell to be tested in an embodiment of the present utility model;

[0029] Figure 10 It is a working schematic view of a cylindrical battery cell testing device in an embodiment of the present utility model.

[0030] Explanation of reference numerals:

[0031] 1 - Operation platform, 11 - Horizontal part, 12 - Vertical part, 2 - Support assembly, 20 - Support surface, 21 - Seat body, 211 - First connection hole, 22 - Support part, 220 - Support column, 221 - Second connection hole, 23 - Card slot, 24 - Lifting part, 25 - Connection surface, 3 - Baffle, 30 - Limiting surface, 31 - Limiting part, 310 - Limiting groove, 32 - Connection part, 4 - Extrusion assembly, 41 - Driving mechanism, 42 - Push rod, 43 - Extrusion head, 5 - Battery cell to be tested, 50 - Accommodation space, 51 - Constrained battery cell. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] In the description and claims of the present utility model, terms such as "first", "second", etc. are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances, so that the embodiments of the present utility model can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0034] It should be understood that "some embodiments" mentioned throughout the specification means that specific features, structures, or characteristics related to the embodiments are included in at least one embodiment of the present utility model. Therefore, the "in some embodiments" that appears throughout the specification does not necessarily refer to the same embodiments. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0035] The following specifically introduces a cylindrical battery cell testing device provided by the present utility model by listing specific embodiments.

[0036] Refer to Figures 1 to 9 , an embodiment of the present utility model provides a cylindrical battery cell testing device, including: an operation platform 1; a support assembly 2, fixedly connected to the operation platform 1, the support assembly 2 having a support surface 20 with an arc structure; a baffle 3, movably connected to the operation platform 1 or the support assembly 2, the baffle 3 having a limiting surface 30 with an arc structure, and a receiving space 50 for receiving a battery cell 5 to be tested is formed between the limiting surface 30 and the support surface 20; an extrusion assembly 4, connected to the operation platform 1, and the extrusion assembly 4 is used to extrude the baffle 3 to test the failure intrusion amount of the battery cell 5 to be tested.

[0037] Specifically, the cylindrical battery cell testing device is mainly used for performing extrusion failure tests on cylindrical battery cells. The extrusion failure test can evaluate the performance and safety of the battery cells when subjected to extrusion loads, thereby providing important reference values for the reliability and safety of the battery cells in actual use. During the battery cell extrusion failure test, the battery cell is placed in the testing device, and then a gradually increasing extrusion load is applied to achieve the test. During the test process, it is necessary to observe changes in aspects such as the appearance, structural integrity, and electrical performance of the battery cell to determine whether the battery cell can withstand the extrusion load and whether safety problems such as short circuits, liquid leakage, and fires will occur in the battery cell.

[0038] The operation platform 1 is used to support the support assembly 2, the baffle 3, and the extrusion assembly 4. The operation platform 1 can be made of a hard metal plate, a composite plate, a plastic plate, etc., and has good strength and stiffness to ensure a stable support effect. Such as Figure 1 andFigure 9 As shown, a part of the working platform 1 is arranged horizontally, and another part can also be arranged vertically to limit the supporting component 2 or the pressing component 4 placed on the working platform 1. Specifically, the working platform 1 can be directly processed from a whole plate through processes such as bending or stamping into an integrated structure with a horizontal part 11 and a vertical part 12. The working platform 1 can also be formed by connecting two independent plates through methods such as threaded connection, snap connection, welding, etc. to form a structure with a horizontal part 11 and a vertical part 12. The specific processing method of the working platform 1 is not limited in this embodiment.

[0039] The supporting component 2 is fixedly connected to the working platform 1. The ways of fixed connection include but are not limited to threaded connection, snap connection, welding, etc. The supporting component 2 is also made of materials with better strength and stiffness performance, such as metal, alloy, composite material, hard plastic, etc. to play a stable supporting role for the battery cell 5 to be tested, and at the same time improve the durability of the supporting component 2 for multiple tests. As Figure 1 As shown, a receiving space 50 for accommodating the battery cell 5 to be tested is formed between the supporting surface 20 of the supporting component 2 and the limiting surface 30 of the baffle 3. The battery cell 5 to be tested is received in the receiving space 50 to realize the extrusion test of the battery cell 5 to be tested.

[0040] Since the cylindrical battery cell testing device of the embodiment of the present utility model is mainly used for testing cylindrical battery cells, that is, the battery cell 5 to be tested is of a cylindrical structure. Therefore, as Figure 4 and Figure 6 As shown, the supporting surface 20 of the supporting component 2 is set as an arc structure, and the limiting surface 30 of the baffle 3 is also set as an arc structure. The arc structure can better fit the surface of the cylindrical battery cell 5 to be tested, reduce the risk of slippage between the supporting surface 20 and the limiting surface 30 and the surface of the battery cell 5 to be tested during the test, and ensure the smooth progress of the test process. In some embodiments, the radius of curvature of the arc structures of the supporting surface 20 and the limiting surface 30 can be set to be the same as the radius of the battery cell 5 to be tested, so that the contact area between the supporting surface 20 and the limiting surface 30 and the surface of the battery cell 5 to be tested is larger, the fitting effect is better, and thus it is more helpful to improve the stability of the test process and the accuracy of the test results.

[0041] The baffle 3 can be movably connected to the working platform 1 or can be movably connected to the supporting component 2. Exemplarily, one or more sliding rails can be provided on the working platform 1 or the supporting component 2, and the side of the baffle 3 close to the working platform 1 or the supporting component 2 is slidably connected to the sliding rail, so as to realize the movable connection between the baffle 3 and the working platform 1 or the supporting component 2. The pressing component 4 can press the baffle 3 to move. During the movement of the baffle 3, the limiting surface 30 on the baffle 3 applies a gradually increasing pressing force to the battery cell 5 to be tested, so as to realize the test of the failure intrusion amount of the battery cell 5 to be tested.

[0042] In summary, the test device according to the embodiment of the present utility model includes an operation platform 1, a support assembly 2, a baffle 3, and a pressing assembly 4. The support assembly 2 has a support surface 20 with an arc structure, and the baffle 3 has a limiting surface 30 with an arc structure. A receiving space 50 for accommodating the battery cell 5 to be tested is formed between the limiting surface 30 and the support surface 20. The pressing assembly 4 can test the failure intrusion amount of the battery cell 5 to be tested by pressing the baffle 3. Since both the support surface 20 and the limiting surface 30 have an arc structure, their surfaces can fully contact the surface of the battery cell 5 to be tested, so that the battery cell 5 to be tested is effectively fixed in the receiving space 50, which helps to reduce the test error of the battery cell 5 to be tested and improve the accuracy of the test result.

[0043] Referring to Figure 1 and Figure 2 , in some alternative embodiments, the support assembly 2 includes: a base body 21; a support portion 22 disposed on the base body 21, and the support surface 20 is disposed on the support portion 22.

[0044] Specifically, the base body 21 is the main part of the support assembly 2. The base body 21 has a "U" - shaped structure. The baffle 3 is disposed on the opening side of the "U" - shaped structure. The support portion 22 is provided on the base body 21, and the support surface 20 is disposed on the support portion 22, that is, the support portion 22 is used to support the battery cell 5 to be tested. The support portion 22 and the base body 21 can be processed into an integral part by an integral molding process, or the support portion 22 and the base body 21 can be two independent components and fixedly connected together by means of threaded connection, snap - connection, welding, etc. Of course, if the support portion 22 and the base body 21 are set as an integral part or connected by welding, the connection reliability between the support portion 22 and the base body 21 can be ensured. During multiple tests of the tooling, the support portion 22 and the base body 21 are not likely to be separated from each other, thus ensuring the normal progress of the test. If the support portion 22 and the base body 21 are connected by threaded connection or snap - connection, the disassembly and separation of the support portion 22 and the base body 21 can be realized, so as to facilitate the regular inspection and maintenance of the support portion 22, avoid the excessive wear of the surface of the support portion 22 affecting the test effect, and thus improve the accuracy of the test result.

[0045] Referring to Figures 4 to 7 , in some alternative embodiments, the support portion 22 includes at least two support columns 220. The at least two support columns 220 are arranged in parallel, and the surface of each support column 220 facing the baffle 3 forms the support surface 20.

[0046] Specifically, the number of the support columns 220 can be two or more, and can be specifically set according to the number of the battery cells 5 to be tested, and this embodiment does not limit this. Figure 4 An embodiment in which the support portion 22 includes four support columns 220 is shown. The four support columns 220 form four support surfaces 20, and three cylindrical battery cells can be supported between the four support surfaces 20. The three cylindrical battery cells, such asFigure 7 As shown, among them, the cylindrical battery cell located in the middle is the battery cell 5 to be tested, and the two cylindrical battery cells located on both sides are the restraint battery cells 51. The restraint battery cells 51 mainly play a role in restraining and fixing the battery cell 5 to be tested to ensure the stability of the battery cell 5 to be tested during the testing process. In an embodiment where the support portion 22 can support three cylindrical battery cells, as Figure 6 shown, there are also three limiting surfaces 30 on the baffle 3, and each limiting surface 30 is used to abut against a cylindrical battery cell, so as to effectively fix the three cylindrical battery cells and avoid the influence of the restraint battery cell 51 on the battery cell 5 to be tested during the testing process.

[0047] Referring to Figure 3 and Figure 5 , in some alternative embodiments, a connection surface 25 is formed on the surface of each support column 220 facing away from the baffle 3. Second connection holes 221 for allowing fasteners such as bolts, screws, and rivets to pass through are provided on the connection surface 25. First connection holes 211 are formed at corresponding positions of the seat body 21. The fasteners pass through the second connection holes 221 and the first connection holes 211 to detachably connect the support column 220 and the seat body 21 together. Further, the connection surface 25 can be a planar structure to increase the contact area between the support column 220 and the seat body 21 and improve the connection reliability between the support column 220 and the seat body 21.

[0048] Referring to Figure 6 , in some alternative embodiments, the baffle 3 includes: a limiting portion 31, and the limiting surface 30 is provided on the limiting portion 31; a connecting portion 32, provided on at least one side of the limiting portion 31, and the connecting portion 32 is movably connected to the seat body 21.

[0049] Specifically, the baffle 3 includes two parts, a limiting portion 31 and a connecting portion 32. The limiting portion 31 is used to limit the battery cell 5 to be tested, and the limiting surface 30 is provided on the limiting portion 31. The connecting portion 32 is used to be movably connected to the seat body 21. Among them, the connecting portion 32 can be provided on one side of the limiting portion 31 to realize the single-sided connection between the baffle 3 and the seat body 21. This connection method helps to simplify the structure of the baffle 3 and is more convenient for the processing of the baffle 3; the connecting portion 32 can also be provided on opposite sides of the limiting portion 31 to realize the double-sided connection between the baffle 3 and the seat body 21. This connection method helps to improve the connection reliability between the baffle 3 and the seat body 21, so as to improve the stability of the movement of the baffle 3 during the process of the pressing assembly 4 pressing the baffle 3 to move.

[0050] Referring to Figure 6, in some alternative embodiments, the limiting part 31 is provided with at least two limiting grooves 310. The at least two limiting grooves 310 are arranged in parallel. The groove walls of each limiting groove 310 form a limiting surface 30. The number of the limiting grooves 310 can be set according to the number of the cells under test 5 and the restraining cells 51, and this embodiment does not limit this. The cells under test 5 and the restraining cells 51 are embedded in the limiting grooves 310. The limiting grooves 310 can play a certain radial limiting role on the cells under test 5 and the restraining cells 51, thereby being more helpful for maintaining the stability of the cells under test 5 and the restraining cells 51 during the test process, reducing the test error, and improving the accuracy of the test results. In some embodiments, both opposite ends of the baffle 3 are connecting parts 32, and the limiting part 31 is arranged between the two connecting parts 32. The multiple limiting grooves 310 are arranged along the direction connecting the two connecting parts 32, and each limiting groove 310 extends along a direction perpendicular to the line connecting the two connecting parts 32. Each limiting groove 310 is a through groove to facilitate the limitation of cylindrical batteries.

[0051] Referring to Figure 2 and Figure 6 , in some alternative embodiments, a clamping groove 23 is provided on the seat body 21 of the support assembly 2. The connecting part 32 of the baffle 3 is movably clamped in the clamping groove 23, thereby realizing the movable connection of the baffle 3 to the seat body 21. Specifically, the clamping groove 23 can be arranged along a direction perpendicular to the direction in which the pressing assembly 4 presses the baffle 3 to move. The depth of the clamping groove 23 is set according to the size of the connecting part 32, and it is only necessary to ensure that the connecting part 32 can be smoothly clamped. Along the direction in which the pressing assembly 4 presses the baffle 3 to move, the width dimension of the clamping groove 23 is larger than the width dimension of the connecting part 32 to ensure that when the pressing assembly 4 presses the baffle 3, the connecting part 32 of the baffle 3 can smoothly move in the clamping groove 23. In some embodiments, a clamping groove 23 is provided at each of the opposite ends of the seat body 21, and each clamping groove 23 is respectively clamped with a connecting part 32.

[0052] Referring to Figure 6 , in some alternative embodiments, the surface of the limiting part 31 close to the support part 22 protrudes from the surface of the connecting part 32, so that the baffle 3 has a structure with different thicknesses. After the connecting part 32 is clamped in the clamping groove 23 on the seat body 21, the limiting part 31 is located outside the clamping groove 23. The limiting part 31 can abut against the seat body 21 on the periphery of the clamping groove 23, thereby playing a limiting role on the baffle 3 to prevent the baffle 3 from sliding left and right relative to the seat body 21. At the same time, when the pressing assembly 4 presses the baffle 3 to move, the limiting part 31 abuts against the seat body 21 on the periphery of the clamping groove 23, and can also play a role in guiding the movement of the baffle 3, further improving the stability of the baffle 3 during the movement process.

[0053] Referring to Figure 2, in some alternative embodiments, a lifting portion 24 is provided on the base body 21 of the support assembly 2. The lifting portion 24 is used to lift the support assembly 2, so as to facilitate placing the support assembly 2 on the working platform 1. The lifting portion 24 can be structures such as a lifting ring, a hook, a lifting groove, etc. The specific structure of the lifting portion 24 is not limited in this embodiment. Figure 2 An embodiment in which the lifting portion 24 is a lifting ring is shown in Figure 2 , and it includes two lifting rings which are respectively arranged on opposite sides of the base body 21 to enhance the stability of the lifting process.

[0054] Referring to Figure 8 , in some alternative embodiments, the pressing assembly 4 includes a driving mechanism 41, a push rod 42 and a pressing head 43; the driving mechanism 41 is connected to the push rod 42, the push rod 42 is connected to the pressing head 43, and the driving mechanism 41 drives the pressing head 43 to move through the push rod 42, so that the pressing head 43 presses the baffle 3. In some embodiments, the pressing assembly 4 further includes a data collector (not shown in the figure), and the data collector is used to collect the pressing parameters generated during the pressing process.

[0055] Specifically, the driving mechanism 41 can be a driving motor or a driving cylinder, etc. The output shaft of the driving motor is connected to the push rod 42, or the piston end of the driving cylinder is connected to the push rod 42. The side of the push rod 42 facing away from the driving motor or the driving cylinder is fixedly connected to the pressing head 43. The fixed connection methods include but are not limited to threaded connection, welding, clamping, etc., and this embodiment is not limited thereto. Further, the side of the pressing head 43 for contacting the baffle 3 can be set as an arc structure, and the center of curvature of the arc structure and the axis of the cell under test 5 are located in the same plane to achieve a more accurate pressing effect on the cell under test 5.

[0056] Referring to Figure 10, in combination with the foregoing embodiments, when testing the cell 5 to be tested using the cylindrical cell testing device of the present invention, the pressing head 43 acts vertically on the baffle 3, and the center of curvature of the arc-shaped structure of the pressing head 43 is aligned with the axis of the cell 5 to be tested. At this time, the limiting surface 30 of the arc-shaped structure, the supporting surface 20 of the arc-shaped structure, and the restraining cell 51 can simulate the structural arrangement state in the whole pack, and jointly form a force constraint on the cell 5 to be tested. The driving mechanism 41 of the pressing assembly 4 starts to push the pressing head 43 through the push rod 42, and the pressing head 43 presses on the baffle 3. The limiting surface 30 on the baffle 3 contacts the cell 5 to be tested and generates a squeezing force on the cell 5 to be tested. The pressing head 43 continuously presses on the baffle 3, and the squeezing force received by the cell 5 to be tested gradually increases. During the process, when the pressing head 43 touches the baffle 3, the driving mechanism 41 monitors the generation of the squeezing force, and at the same time, the data collector starts to record the intrusion amount. When it is monitored that the cell 5 to be tested fails, for example, the voltage drop of the cell 5 to be tested reaches 25%, or the temperature rise rate of the cell 5 to be tested reaches 1 °C / s and lasts for more than 3 s, the current intrusion amount is defined as the failure boundary of the cell 5 to be tested in the whole pack extrusion.

[0057] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cylindrical battery cell testing device, characterized in that: include: Working platform (1); A support assembly (2) connected to the working platform (1), wherein the support assembly (2) has a support surface (20) with an arc-shaped structure; A baffle (3) movably connected to the working platform (1) or the supporting assembly (2), the baffle (3) having a limiting surface (30) of an arc-shaped structure, and a receiving space (50) for receiving the battery cell (5) to be tested is formed between the limiting surface (30) and the supporting surface (20); An extrusion assembly (4) is connected to the working platform (1), and the extrusion assembly (4) is used to extrude the baffle (3) to test the failure intrusion amount of the battery cell (5) to be tested.

2. The cylindrical battery cell testing equipment according to claim 1, characterized in that: The support assembly (2) comprises: base(21); The support portion (22) is arranged on the seat body (21), and the support surface (20) is arranged on the support portion (22).

3. The cylindrical battery cell testing equipment according to claim 2, characterized in that: The support portion (22) comprises at least two support columns (220), and the at least two support columns (220) are arranged in parallel, and the surface of each support column (220) facing the baffle (3) forms the support surface (20).

4. The cylindrical battery cell testing equipment according to claim 3, characterized in that: The surface of each support column (220) on the side facing away from the baffle (3) forms a connection surface (25), and the support column (220) is detachably connected to the seat body (21) via the connection surface (25).

5. The cylindrical battery cell testing equipment according to claim 2, characterized in that: The baffle (3) comprises: A limiting portion (31), wherein the limiting surface (30) is arranged on the limiting portion (31); A connecting portion (32) is provided on at least one side of the limiting portion (31), and the connecting portion (32) is movably connected to the seat body (21).

6. The cylindrical battery cell testing device according to claim 5, characterized in that: The limiting portion (31) is provided with at least two limiting grooves (310), and the at least two limiting grooves (310) are arranged in parallel, and the groove wall of each limiting groove (310) forms the limiting surface (30).

7. The cylindrical battery cell testing device according to claim 5, characterized in that: A clamping groove (23) is respectively provided at two opposite ends of the seat body (21), and the connecting portion (32) can be movably clamped in the clamping groove (23).

8. The cylindrical battery cell testing device according to claim 7, characterized in that: The surface of the limiting portion (31) on a side close to the supporting portion (22) protrudes from the surface of the connecting portion (32).

9. The cylindrical battery cell testing device according to claim 2, characterized in that: The seat body (21) is provided with a hoisting portion (24), and the hoisting portion (24) is used to realize the hoisting of the support assembly (2).

10. The cylindrical battery cell testing equipment according to claim 1, characterized in that: The extrusion assembly (4) comprises a driving mechanism (41), a push rod (42) and an extrusion head (43); The driving mechanism (41) is connected to the push rod (42), and the push rod (42) is connected to the extrusion head (43). The driving mechanism (41) drives the extrusion head (43) to move via the push rod (42), so that the extrusion head (43) extrudes the baffle (3).

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