Dimension detection tool for die cutting pole piece of lithium battery

Abstract

The utility model discloses a lithium battery die cutting pole piece dimension detection tool comprising an integrally formed body, two side surfaces of the body are respectively a tolerance-free detection surface and a tolerance detection surface, the tolerance-free detection surface is provided with a tolerance-free groove, the tolerance detection surface is provided with a tolerance groove, and the tolerance detection surface is provided with a tolerance groove. A boss matched with the tolerance groove in shape is arranged on the inner wall of the tolerance groove, and tab grooves are formed in the tops of the tolerance-free groove and the tolerance groove. The die-cutting pole piece detection tool has the advantages that the waste of the die-cutting pole piece is reduced, the detection efficiency is improved, the labor intensity of workers is reduced, the die-cutting pole piece is convenient to take, and the detection tool is simple to manufacture and machine, integrally formed, simple in structure, easy to master and operate and low in manufacturing and maintenance cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary detection equipment for die-cutting pole pieces of lithium batteries, and in particular relates to a tool for detecting the size of die-cutting pole pieces of lithium batteries. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery), commonly known as lithium battery. It mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. During the charging and discharging process, Li+ is embedded and de-embedded between the two electrodes; when charging, Li+ is de-embedded from the positive electrode and embedded in the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

[0003] Most of the current lithium-ion battery production adopts the lamination process, which includes the following steps: 1. Slurrying: Use a special solvent and a binder to mix with the powdered positive and negative active materials respectively, and after stirring evenly, make a slurry of positive and negative materials; 2. Coating: Use an automatic coating machine to evenly coat the positive and negative slurries on the surface of the metal foil, and then automatically dry and automatically cut to form positive and negative electrode sheets; 3. Assembly: Alternately stack the positive and negative electrode sheets together and separate them with a diaphragm, that is, in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm from top to bottom, the electrolyte is injected, the sealing, positive and negative electrode ears are welded, and the battery assembly process is completed to make a finished battery. This process has very high requirements for the consistency of the size of the lithium battery electrode sheet. If the error of the size of the lithium battery die-cut electrode sheet is large, it will seriously affect the quality of the battery and even cause serious consequences.

[0004] At present, there are two main ways to detect the size of die-cut pole pieces for lithium batteries. One is to use special testing equipment to test the die-cut pole pieces one by one. Although the detection efficiency has been improved, it occupies a large area and is expensive, which is not suitable for application in small and medium-sized enterprises. The second is to use the tooling comparison method for detection. The existing die-cut pole piece detection tooling has a single structure and function, and can only check die-cut pole pieces of a single size. When there is a slight error in the die-cut pole piece, it is difficult to determine the size of the die-cut pole piece, resulting in a waste of the die-cut pole piece. In addition, the detection tooling does not have a structure that is convenient for taking the die-cut pole piece, which affects the efficiency of die-cut pole piece detection. Utility Model Content

[0005] The utility model aims to provide a lithium battery die-cut pole piece size detection tool to solve the problems in the prior art that the special detection equipment occupies a large area, is expensive, is not suitable for application in small and medium-sized enterprises, the detection tool has a single function, the die-cut pole pieces are seriously wasted, the die-cut pole pieces are not easy to remove from the detection tool, and the die-cut pole piece detection efficiency is low.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: a lithium battery die-cutting pole piece size detection tooling, including an integrally formed main body, the two sides of the main body are respectively a no-tolerance detection surface and a tolerance detection surface, a no-tolerance groove is provided on the no-tolerance detection surface, a tolerance groove is provided on the tolerance detection surface, a boss matched with the shape of the tolerance groove is provided on the inner wall of the tolerance groove, and pole ear grooves are provided on the top of the no-tolerance groove and the tolerance groove.

[0007] Preferably, a hollow groove is provided in the middle of the main body, and the hollow groove is extended inside the non-tolerance groove and the tolerance groove.

[0008] Preferably, the boss divides the tolerance groove into two tolerance grooves, and the width of the boss is 1.5 mm.

[0009] Preferably, a flap is rotatably connected to the pole ear groove, two protrusions are symmetrically fixedly connected to the bottom of the flap, and the flap is extended outside the pole ear groove.

[0010] The advantages of the utility model are:

[0011] 1. By opening a non-tolerance groove and a tolerance groove on both sides of the body, the size of the die-cut pole piece can be quickly detected. When the die-cut pole piece cannot be completely placed in the non-tolerance groove, the detection tooling can be turned over and the die-cut pole piece can be placed in the tolerance groove. A boss is provided on the inner wall of the tolerance groove to separate the tolerance groove into two grooves. As long as the size tolerance of the die-cut pole piece is within the specified range, it can be identified as qualified. The two groove sizes of the tolerance groove are exactly within the specified range of the tolerance. If the die-cut pole piece can be placed exactly in the tolerance groove, it is identified as a qualified pole piece, which reduces the waste of die-cut pole pieces and improves the detection efficiency.

[0012] 2. Hollow grooves are opened on both sides of the die-cut pole piece. After the die-cut pole piece inspection is completed, the staff can easily take out the die-cut pole piece through the hollow groove, which not only improves the inspection efficiency but also reduces the labor intensity of the workers;

[0013] 3. A flap is connected to the pole ear groove for rotation. By flipping the flap, the staff can easily remove the die-cut pole piece from the inspection tooling;

[0014] 4. The entire inspection tooling is simple to manufacture and process, one-piece molding, simple structure, easy to operate, and low in manufacturing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the tolerance-free detection surface of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the tolerance detection surface of the utility model.

[0018] Figure 4 For this utility model Figure 1 Schematic diagram of the partially enlarged structure of part A in the middle.

[0019] Figure 5 For this utility model Figure 3 Schematic diagram of the partial enlarged structure of part B in the middle.

[0020] The meanings of the reference numerals are as follows: body (1), non-tolerance detection surface (2), tolerance detection surface (3), non-tolerance groove (4), tolerance groove (5), boss (6), tab groove (7), hollow groove (8), flap (9), and convex block (10). DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figures 1 to 5 A lithium battery die-cut pole piece size detection tool shown in the figure includes an integrally formed main body 1, the two side surfaces of the main body 1 are respectively a no-tolerance detection surface 2 and a tolerance detection surface 3, a no-tolerance groove 4 is provided on the no-tolerance detection surface 2, a tolerance groove 5 is provided on the tolerance detection surface 3, a boss 6 which is adapted to the shape of the tolerance groove 5 is provided on the inner wall of the tolerance groove 5, the boss 6 divides the tolerance groove into two grooves, and a die-cut pole piece of slightly larger or smaller size can be placed therein, and pole ear grooves 7 are provided on the top of the no-tolerance groove 4 and the tolerance groove 5.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, in order to facilitate the staff to take the die-cut pole pieces on the tolerance-free groove 4 and the tolerance groove 5, improve the detection efficiency, and reduce the labor intensity of the workers, a hollow groove 8 is provided in the middle of the main body 1, and the hollow groove 8 is extended in the tolerance-free groove 4 and the tolerance groove 5. The middle part of the tolerance-free groove 4 and the tolerance groove 5 is just the extension of the hollow groove 8. The worker can lift the die-cut pole piece through the hollow groove 8 for easy taking.

[0024] like Figure 3 , Figure 4 and Figure 5 As shown, in order to place the die-cut pole piece with an error within the specified range into the tolerance groove 5, the boss 6 divides the tolerance groove 5 into two tolerance grooves 5, and the width of the boss 6 is 1.5 mm, which is exactly the tolerance value within the specified range.

[0025] like Figures 1 to 5As shown, in order to further facilitate the removal of the die-cut pole pieces on the non-tolerance groove 4 and the tolerance groove 5 and improve the detection efficiency, a flap 9 is rotatably connected to the pole ear groove 7, and two protrusions 10 are symmetrically fixedly connected to the bottom of the flap 9. The flap 9 is extended outside the pole ear groove 7. By flipping the flap 9, the die-cut pole pieces on the tolerance groove 4 and the tolerance groove 5 can be easily removed, reducing the labor intensity of workers.

[0026] When the utility model is used, first, the body 1 is placed flat on the workbench so that the upper surface of the tolerance-free detection surface 2 faces upward; secondly, the die-cut pole piece is placed in the tolerance-free groove 4, and the size of the die-cut pole piece is judged to be up to standard by comparing the die-cut pole piece with the tolerance-free groove 4. When the die-cut pole piece is up to standard, the staff can lift the die-cut pole piece through the hollow groove 8 and remove it from the tolerance-free groove 4, or turn over the flap 9 on the pole ear groove 7 to make the die-cut pole piece tilted for easy removal to complete the inspection; thirdly, after comparing the die-cut pole piece with the tolerance-free groove 4, it is found that the die-cut pole piece is slightly larger or slightly smaller than the tolerance-free groove 4. When it is smaller than the no-tolerance groove 4, turn one side of the main body 1 so that the upper surface of the tolerance detection surface 3 faces upward, and place the die-cut electrode into the tolerance groove 5. By comparing the die-cut electrode with the tolerance groove 5, it is determined whether the size of the die-cut electrode meets the standard. When the die-cut electrode meets the standard, the die-cut electrode can be removed through the hollow groove 8 or the flap 9. If the size of the die-cut electrode is larger than the maximum groove of the tolerance groove 5, or smaller than the minimum groove of the tolerance groove 5, it is determined that the size of the die-cut electrode does not meet the standard and is treated as waste. Finally, the die-cut electrode pieces that have been inspected can be stacked and placed in a electrode collection box.

[0027] The above is only a preferred example of the present invention, and the technical solution of the present invention is not limited thereto. It should be pointed out that for ordinary technicians in this field, under the technical inspiration provided by the present invention, as common knowledge in the field, other equivalent deformations and improvements can be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A tool for detecting the size of a lithium battery die-cutting pole piece, characterized in that: The invention comprises an integrally formed body (1), wherein two side surfaces of the body (1) are respectively a non-tolerance detection surface (2) and a tolerance detection surface (3), the non-tolerance detection surface (2) is provided with a non-tolerance groove (4), the tolerance detection surface (3) is provided with a tolerance groove (5), the inner wall of the tolerance groove (5) is provided with a boss (6) matching the shape of the tolerance groove (5), and the tops of the non-tolerance groove (4) and the tolerance groove (5) are provided with a tab groove (7).

2. A lithium battery die-cutting pole piece size detection tool as claimed in claim 1, characterized in that: A hollow groove (8) is provided in the middle of the body (1), and the hollow groove (8) is extended and arranged inside the non-tolerance groove (4) and the tolerance groove (5).

3. A lithium battery die-cutting pole piece size detection tool as claimed in claim 2, characterized in that: The boss (6) separates the tolerance groove (5) into two tolerance grooves (5), and the width of the boss (6) is 1.5 mm.

4. A lithium battery die-cutting pole piece size detection tool as claimed in claim 3, characterized in that: A flap (9) is rotatably connected to the tab groove (7), two protrusions (10) are symmetrically fixedly connected to the bottom of the flap (9), and the flap (9) is extended outside the tab groove (7).

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