Drawing force testing tool

Abstract

The utility model discloses a drawing force testing tool, which is characterized in that a connecting seat is at least provided with an opening, and the opening extends towards the inside of the connecting seat so as to enable the inside of the connecting seat to be provided with an accommodating space; the movable plate is mounted in the accommodating space in a sliding manner; a mounting hole is formed in the side wall of the connecting seat, the nut is mounted in the mounting hole, and the lead screw is mounted on the nut and penetrates through the side wall of the connecting seat to be mounted on the moving plate; one end of the battery cell is welded to the current collecting disc, the other end of the battery cell extends into the containing space, the lead screw drives the movable plate to clamp the battery cell, and the device is easy to operate, accurate and safe in testing and wide in application range.

Description

Technical Field

[0001] This utility model relates to the technical field of pull-out force testing of cylindrical batteries, and in particular to a pull-out force testing fixture. Background Technology

[0002] Cylindrical lithium-ion batteries possess advantages such as high energy density and excellent cycle performance, and are widely used in mobile phones, tablets, wearable devices, power banks, power tools, power supplies, and energy storage. In the manufacturing process of cylindrical batteries, welding is a common connection method, and the quality and strength of the weld points are crucial to the product's performance and reliability, and consequently, the overall battery performance. Therefore, to ensure the strength and quality of the welded joints, pull-out strength testing is necessary. Pull-out strength testing is a commonly used method for evaluating the strength and reliability of weld points and is a key tool for ensuring weld strength and quality. Through proper design and manufacturing, these tools can ensure the accuracy and repeatability of the tests, improving product performance and reliability.

[0003] However, existing battery clamping fixtures are limited by the shape of cylindrical battery cells, resulting in poor fixture size compatibility. A single fixture cannot simultaneously test both bare and casing cells, and its operation is difficult. For these two reasons, employees typically hold the battery cell under test by hand. However, holding the cell by hand presents the following problems: 1. The direction of the pulling force is not fixed during employee testing, leading to unstable measurement results and significant errors. 2. An angle deviation during measurement may cause the hook to slip, posing a safety risk. Utility Model Content

[0004] In view of this, in order to solve the above problems, the purpose of this utility model is to provide a pull-out force testing fixture, which includes:

[0005] Connector, moving plate, lead screw, nut, battery cell, current collector;

[0006] The connector has at least one opening that extends into the interior of the connector so that the interior of the connector has an accommodating space.

[0007] The movable plate is slidably installed inside the accommodating space;

[0008] The side wall of the connecting seat is provided with a mounting hole, the nut is installed in the mounting hole, the lead screw is installed in the nut, and passes through the side wall of the connecting seat to be installed on the movable plate;

[0009] One end of the battery cell is welded to the current collector, the other end of the battery cell extends into the accommodating space, and the lead screw drives the moving plate to clamp the battery cell.

[0010] The aforementioned pull-out force testing fixture further includes: a pull-out force testing machine; a first fixed seat is provided on one surface of the pull-out force testing machine, the first fixed seat fixing the connecting seat, and a second fixed seat is provided on the other surface of the pull-out force testing machine, with screws fixed on the second fixed seat.

[0011] In the above-mentioned pull-out force testing fixture, the bottom surface of the connecting seat extends outward to provide a connecting post, and the connecting post is fixedly installed on the first fixed seat.

[0012] In the above-mentioned pull-out force testing fixture, the first fixed base is provided with a through hole, and the connecting post is inserted into the through hole.

[0013] The aforementioned pull-out force testing fixture further includes: an assisting rod; the assisting rod is mounted to the lead screw by screws.

[0014] The aforementioned pull-out force testing fixture further includes: a plurality of guide structures; one end of each of the guide structures passes through the side wall of the connecting seat and is mounted on the movable plate.

[0015] In the above-mentioned pull-out force testing fixture, each of the guide structures includes: a guide shaft and a fixing screw; the guide shaft is installed on the side wall of the connecting seat, and the fixing screw passes through the guide shaft and is installed on the connecting seat.

[0016] In the aforementioned pull-out force testing fixture, both the moving plate and the connecting seat have grooves on their opposite inner walls that match the battery cell.

[0017] In the above-mentioned pull-out force testing fixture, the end of the battery cell that extends into the connector is knurled.

[0018] In the above-mentioned pull-out force testing fixture, the edges of the grooves are all rounded.

[0019] The positive effects of the above technical solution compared with the existing technology are:

[0020] 1. This device is easy to operate: the battery cell to be tested can be clamped simply by rotating the lead screw.

[0021] 2. Accurate and safe testing: The use of fixtures ensures that the direction and force of the pull-out force during testing are controllable, avoiding errors caused by handheld product testing and improving the accuracy and safety of the measurement results.

[0022] 3. Wide range of applications: The tooling is simple, lightweight and easy to carry. It is compatible with products of various sizes and has a guide structure to increase the connection points with the product to be tested and facilitate the assembly and disassembly of different types of products, thus expanding the scope of application of the tooling. Attached Figure Description

[0023] Figure 1 This is a perspective view of a pull-out force testing fixture according to the present invention.

[0024] Figure 2 This is a front view of a pull-out force testing fixture according to the present invention.

[0025] Figure 3 This is a side view of a pull-out force testing fixture according to the present invention.

[0026] Figure 4 This is a top view of a pull-out force testing fixture according to the present invention.

[0027] Figure 5 This is a schematic diagram of the collector plate in this utility model.

[0028] Figure 6 This is a schematic diagram of the pull-out force testing machine in this utility model.

[0029] Figure 7 This is a schematic diagram of the battery cell in this utility model.

[0030] 1. Connecting seat; 2. Moving plate; 3. Lead screw; 4. Nut; 5. Battery cell; 6. Current collector; 7. Accommodation space; 8. Pull-out force testing machine; 9. First fixed seat; 10. Second fixed seat; 11. Connecting column; 12. Through hole; 13. Assist rod; 14. Screw; 15. Guide structure; 16. Guide shaft; 17. Fixing screw; 18. Groove. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0032] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0033] like Figures 1 to 7As shown in the figure, a drawing force testing tooling of a preferred embodiment is shown, which includes: a connecting seat 1, a moving plate 2, a screw rod 3, a nut 4, a battery cell 5, and a current collector plate 6.

[0034] The connecting seat 1 is arranged in a "U" shape. The connecting seat 1 has at least one opening, and the opening extends towards the inside of the connecting seat 1 so that an accommodation space 7 is provided inside the connecting seat 1; the moving plate 2 is slidably installed inside the accommodation space 7; an installation hole is provided on the side wall of the connecting seat 1, the nut 4 is installed in the installation hole, the screw rod 3 is installed on the nut 4, and passes through the side wall of the connecting seat 1 and is installed on the moving plate 2; one end of the battery cell 5 is welded to the current collector plate 6, and the other end of the battery cell 5 extends into the accommodation space 7, and the screw rod 3 drives the moving plate 2 to clamp the battery cell 5.

[0035] During the actual use process, first, the cylindrical battery cell 5 is welded to the current collector plate 6. After the welding is completed, the battery cell 5 is placed in the accommodation space 7 for fixation. Then, the screw rod 3 is rotated. The screw rod 3 rotates on the nut 4. Finally, the screw rod 3 drives the moving plate 2 to clamp the battery cell 5. Then, iron wires are placed on the three surfaces of the current collector plate 6 and fixed with AB glue. The iron wires on the current collector plate 6 are fixed with the screws on the drawing force testing machine 8. The current collector plate 6 is connected to the drawing force testing machine 8. Finally, the drawing force testing program is started, and the drawing force testing machine 8 applies a tensile force to measure the welding strength between the current collector plate 6 and the battery cell 5.

[0036] Further, various screw rods can be used for the screw rod 3 in the present application, such as a common screw rod or a trapezoidal screw rod, etc., and corresponding nuts can be used for the nut 4, such as a common nut or a trapezoidal nut, etc.

[0037] The present utility model further has the following implementation manners based on the above:

[0038] Further, a drawing force testing tooling, which further includes: a drawing force testing machine 8; a first fixing seat 9 is provided on one surface of the drawing force testing machine 8, and the first fixing seat 9 fixedly connects the connecting seat 1. A second fixing seat 10 is provided on the other surface of the drawing force testing machine 8, and screws are installed on the second fixing seat 10. Specifically, after the battery cell 5 is fixed, the iron wires on the current collector plate 6 are fixed with the screws on the second fixing seat 10.

[0039] Further, a drawing force testing tooling, wherein a connecting column 11 extends outward from the bottom surface of the connecting seat 1, and the connecting column 11 is fixedly installed on the first fixing seat 9.

[0040] Furthermore, a pull-out force testing fixture includes a first fixed base 9 with a through hole 12, into which a connecting post 11 is inserted. Specifically, the testing fixture is mounted on the first fixed base 9 via the connecting post 11, and then fixed by screws or other means. Furthermore, the installation direction of the first fixed base 9 and the pull-out force testing machine 8 can be set according to actual usage, and can be longitudinally, laterally, or obliquely, resulting in multiple possible orientations for the through hole 12 and the testing fixture.

[0041] Furthermore, a pull-out force testing fixture further includes: an assisting rod 13; the assisting rod 13 is mounted to the lead screw 3 via screws 14. Specifically, the assisting rod 13, connected to the lead screw 3 via screws 14, provides high-strength support, ensuring the lead screw 3 remains stable during operation and will not move or tilt due to external forces or vibrations. Through the screw connection, the assisting rod 13 can accurately position the lead screw 3, ensuring its accuracy and stability during operation. Furthermore, the connection between the assisting rod 13 and the screws 14 protects the lead screw 3, preventing damage during operation and extending its service life.

[0042] Furthermore, a pull-out force testing fixture further includes: a plurality of guide structures 15; one end of each guide structure 15 passes through the side wall of the connecting seat 1 and is mounted on the movable plate 2. Specifically, the guide structures 15 enable the movement of the movable plate 2 to be more stable.

[0043] Furthermore, a pull-out force testing fixture is provided, wherein each guide structure 15 includes: a guide shaft 16; a fixing screw 17; the guide shaft 16 is mounted on the side wall of the connecting seat 1, and the fixing screw 17 passes through the guide shaft 16 and is mounted on the connecting seat 1. Specifically, the guide structure 15 not only makes the movement of the moving plate 2 more stable, but also, when the test standard is greater than 200N, the fixing screw 17 can be used to reinforce the battery cell 5.

[0044] Furthermore, a pull-out force testing fixture is provided, wherein the inner walls of the moving plate 2 and the connecting seat 1 are both provided with grooves 18 that match the battery cell 5. In order to make the clamping of the battery cell 5 more stable, grooves 18 with the same shape as the battery cell 5 are provided.

[0045] Furthermore, in a pull-out force testing fixture, the end of the battery cell 5 that extends into the connector 1 is knurled. Knurling increases friction; by increasing the contact area, knurling increases the friction between the battery cell 5 and the cell under test, preventing the cell 5 from slipping during testing and ensuring the accuracy of the test results. Knurling also prevents cell deformation by dispersing the test force, preventing concentrated force from causing deformation of the cell 5 and protecting it from damage.

[0046] Furthermore, a pull-out force testing fixture is provided, wherein the edges of the grooves 18 are all rounded. Specifically, this protects the battery cell 5 from scratches.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pull force test fixture, characterized by, The utility model relates to a battery cell pulling force testing machine, including: Connecting seat, moving plate, screw rod, nut, electric core, current collecting disc; The connecting seat has at least an opening extending to the interior of the connecting seat to provide the interior of the connecting seat with a containing space; The moving plate is slidingly installed in the interior of the containing space; The side wall of the connecting seat is provided with a mounting hole, the nut is installed in the mounting hole, the screw rod is installed in the nut, and the screw rod passes through the side wall of the connecting seat and is installed in the moving plate; One end of the electric core is welded to the current collecting disc, the other end of the electric core extends into the containing space, and the screw rod drives the moving plate to clamp the electric core.

2. The pull force testing tool of claim 1, wherein, Further including: Pulling force testing machine; One surface of the pulling force testing machine is provided with a first fixing seat, the first fixing seat fixes the connecting seat, the other surface of the pulling force testing machine is provided with a second fixing seat, and a screw is fixed on the second fixing seat.

3. The pull force testing tool of claim 2, wherein, The bottom surface of the connecting seat extends outward and is provided with a connecting column, and the connecting column is fixedly installed in the first fixing seat.

4. The pull force testing tool of claim 3, wherein, The first fixing seat is provided with a through hole, and the connecting column is inserted into the through hole.

5. The pull force testing tool of claim 1, wherein, Further including: Power stick; The power stick is installed in the screw rod through a screw.

6. The pull force testing tool of claim 1, wherein, Further including: Several guide structures; One end of each of the guide structures passes through the side wall of the connecting seat and is installed in the moving plate.

7. The pull force testing tool of claim 6, wherein, Each of the guide structures includes a guide shaft and a fixing screw, the guide shaft is installed in the side wall of the connecting seat, and the fixing screw passes through the guide shaft and is installed in the connecting seat.

8. The pull force testing tool of claim 1, wherein, The opposite two inner walls of the moving plate and the connecting seat are each provided with a groove matched with the electric core.

9. The pull force testing tool of claim 1, wherein, The end of the electric core extending into the connecting seat is knurled.

10. The pull force testing tool of claim 8, wherein, The edges of the grooves are all provided with rounded corners.

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