Battery tab center distance screening clamp

Abstract

The utility model provides a battery tab center distance screening clamp, which comprises a bottom plate and screen strips, the bottom plate is strip-shaped, the two sides of the bottom plate in the length direction are concave inwards to form arc-shaped waist grooves, the screen strips are fixed on the surface of one end of the bottom plate, and a rectangular center distance screening groove is arranged in the middle of the bottom plate. And electrode lug screening grooves are formed in the screening strips on the two sides of the center distance screening groove. By the adoption of the scheme, the structure is reasonable, meanwhile, an operator can conveniently and rapidly take out the verified and screened battery cells from the clamp smoothly, the working efficiency is improved, and meanwhile the situation that the outer surfaces of the battery cells are scratched by the clamp, and consequently the appearance of products is poor is avoided.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery testing technology, and in particular to a battery tab center distance screening fixture. Background Technology

[0002] The advantages of pouch lithium-ion batteries mainly include good safety, light weight, large capacity, low internal resistance, flexible design, lightweight design, low internal resistance, high energy density, good heat dissipation, good fast charging capability, and significant cost-effectiveness. They are 40% lighter than steel-cased lithium batteries of the same capacity and 20% lighter than aluminum-cased batteries, helping to reduce the overall weight of the vehicle and improve energy efficiency. The traditional, more efficient production method is wound lithium-ion batteries. However, the electrode tabs are affected by factors such as electrode design, electrode expansion thickness, welding position, winding tightness, and winding needle size, resulting in unstable center-to-center distances that seriously affect the top-side sealing quality of the product. Patent CN 206574796 U (A Battery Tab Center Distance Positioning Fixture) designs a battery tab center distance positioning fixture to make the positioning of the positive and negative tabs of the battery cell more accurate. However, in actual operation, the battery cell is not easy to remove after being placed in the fixture (both ends have protrusions) and the center distance of the tabs is compared. The battery cell is easy to get stuck in the fixture, which seriously affects the work efficiency. If force is used to remove it, the edge of the fixture will damage the surface of the battery cell. At the same time, it can only detect the distance between the two tabs, but cannot detect the distance between the inner core center line and the tabs. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a battery tab center distance screening fixture with a reasonable structure that allows operators to quickly and easily remove the screened battery cells from the fixture, thereby improving work efficiency and preventing the outer surface of the battery cells from being scratched by the fixture, resulting in poor product appearance.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: a battery tab center distance screening fixture, which includes a base plate and screen bars. The base plate is long and narrow, with concave sides on both sides in the length direction forming an arc-shaped waist groove. A screen bar is fixed on one end surface of the base plate, and a rectangular center distance screening groove is provided in the middle of the base plate. Tab screening grooves are provided on the screen bars on both sides of the center distance screening groove.

[0005] The electrode screening groove is two, located at both ends of the screen bar, and the center line between the two electrode screening grooves is on the same straight line as the center line of the center distance screening groove.

[0006] The length direction of the center distance screening groove is consistent with the length direction of the base plate, and the center distance screening groove runs through the base plate vertically.

[0007] The screen bar is long and narrow, with its length direction aligned with the width direction of the base plate.

[0008] Compared with the prior art, the technical advantages of this utility model are as follows:

[0009] First, this solution designs the fixture body in an arc shape, which has a reasonable structure, low cost, can be directly used for solid and liquid batteries, and is easy to operate.

[0010] Secondly, the center distance screening slot of this solution can quickly compare the center distance of the screening tabs, and at the same time, it can facilitate the operator to quickly and smoothly remove the checked and screened cells from the fixture, thus improving work efficiency.

[0011] Third, the single-screen design allows the battery cell to be gently lifted with a finger, preventing the surface of the battery cell from being attracted to the clamp due to static electricity. This allows the battery cell to quickly detach from the clamp, avoiding scratches on the outer surface of the battery cell and resulting in poor product appearance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the electrode screening groove of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to all the accompanying drawings. A preferred embodiment of the present invention is shown in the accompanying drawings. Figure 1 To be continued Figure 3 The battery tab center distance screening fixture described in this embodiment includes a base plate 1 and a screen bar 2. The base plate 1 is long and narrow, with two concave sides forming an arc-shaped waist groove 3 along its length. A screen bar 2 is fixed to one end surface of the base plate 1. A rectangular center distance screening groove 4 is provided in the middle of the base plate 1. Tab screening grooves 5 are provided on the screen bars 2 on both sides of the center distance screening groove 4.

[0016] There are two electrode screening grooves 5, located at both ends of the screen bar 2. The center line between the two electrode screening grooves 5 is on the same straight line as the center line of the center distance screening groove 4. The length direction of the center distance screening groove 4 is consistent with the length direction of the base plate 1, and the center distance screening groove 4 extends vertically through the base plate 1. The screen bar 2 is long and narrow, and its length direction is consistent with the width direction of the base plate 1.

[0017] After adopting the above solution, the inner core is placed at the center distance screening groove, and the electrode tabs are aligned (embedded) in the corresponding electrode tab screening grooves for quick screening. This solution places the sieve bar at one end of the base plate, making it easier to put in and take out the electrode tabs. The center distance screening groove that runs through the top and bottom improves the positioning effect of the inner core, preventing the inner core from getting stuck on the base plate. At the same time, it quickly screens the center distance between the inner core and the electrode tabs. The use of two waist grooves makes it easy to pick up (simply squeeze the two waist grooves by hand), while also reducing the weight of the base plate, saving raw materials, and reducing the manufacturing cost of the fixture. The structure after adopting this solution is reasonable, and it also allows the operator to quickly and smoothly remove the calibrated and screened battery cells from the fixture, improving work efficiency and avoiding scratches on the outer surface of the battery cells by the fixture, which would result in poor product appearance.

[0018] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A battery tab center distance screening fixture, characterized in that: It includes a base plate (1) and sieve bars (2). The base plate (1) is long and narrow, with concave sides on both sides in the length direction forming an arc-shaped waist groove (3). A sieve bar (2) is fixed on one end of the base plate (1). A rectangular center distance screening groove (4) is provided in the middle of the base plate (1). A tab screening groove (5) is provided on the sieve bars (2) on both sides of the center distance screening groove (4).

2. A battery tab center distance screening fixture according to claim 1, characterized in that: There are two electrode screening grooves (5), located at both ends of the screen bar (2). The center line between the two electrode screening grooves (5) and the center line of the center distance screening groove (4) are on the same straight line.

3. A battery tab center distance screening fixture according to claim 1, characterized in that: The length direction of the center distance screening groove (4) is consistent with the length direction of the base plate (1), and the center distance screening groove (4) runs through the base plate (1) vertically.

4. A battery tab center distance screening fixture according to claim 1, characterized in that: The sieve bar (2) is long and its length direction is consistent with the width direction of the bottom plate (1).

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