Button cell shell structure

Abstract

The utility model discloses a button cell shell structure, and relates to the field of button cells. The button cell shell structure comprises a wrapping shell and a press-fit shell cover installed on the wrapping shell, a sealing piece is arranged between the wrapping shell and the press-fit shell cover, an installation part is arranged on the outer side of the press-fit shell cover, the installation part is bent upwards towards the outer side, and the bent part inclines outwards to abut against the sealing piece. The outer side of the mounting part is provided with a burr which is folded inwards, the burr and the end part of the mounting part form an outward arc surface, and the arc surface is in contact with the sealing element. According to the button battery shell structure, the press forming process of the press-fit shell cover is improved, so that a notch is inclined outwards when the press-fit shell cover is cut off from a blank in a stamping manner, the connecting part of the outer end of the mounting part and a burr presents an outward arc surface during assembly, and the arc surface is in extrusion contact with a sealing element, so that the sealing effect is improved; therefore, puncture caused by contact between burrs and the sealing element is avoided, and the yield of button cell processing is fundamentally improved.

Description

Technical Field

[0001] This utility model relates to the field of button battery technology, specifically to a button battery casing structure. Background Technology

[0002] A button cell battery is a flat battery that resembles a button in shape. The metal coating on its outer surface is the positive electrode, and the inside is filled with battery core material. The top opening of the metal coating has a negative electrode metal material for sealing and fixing, and the two are isolated by insulating material. During manufacturing, interference fit is used to fix them.

[0003] In existing manufacturing processes, the negative electrode cover of button batteries is usually formed by rapid stamping using die casting or stamping machines. Because the formed parts are very small, secondary stamping and burr removal are usually not performed. The burrs formed by stamping are in an outward expanding state, which makes it very easy to puncture the insulation layer after assembly, causing short circuits in the battery and affecting the yield of button batteries. The existing solution is usually to use an industrial camera to inspect the negative electrode cover before battery pressing to eliminate some negative electrode covers with excessive burrs. However, this is costly and does not fundamentally solve the problem. Therefore, a button battery casing structure is provided to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a button battery casing structure that solves the problem that after the negative electrode cover of an existing button battery is stamped, outwardly expanding burrs will form at the edge, which will puncture the insulation layer during assembly and affect the yield of the battery.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a button battery casing structure, comprising a covering casing and a press-fit cover mounted on the covering casing, wherein a sealing element is provided between the covering casing and the press-fit cover, and an mounting portion is provided on the outer side of the press-fit cover, wherein the mounting portion is bent upward outward, and the bent portion is inclined outward to abut against the sealing element, wherein an inwardly folded burr is provided on the outer side of the mounting portion, wherein the burr and the end of the mounting portion form an outwardly arc surface, and the arc surface contacts the sealing element.

[0006] Preferably, the covering shell is a positive electrode metal, the press-fit shell cover is a negative electrode metal, and the sealing element is insulating rubber.

[0007] Preferably, the encapsulated shell includes an annular cavity and a positive electrode contact portion integrally formed at the bottom end of the annular cavity, and the sealing element is installed on the inner top of the annular cavity.

[0008] Preferably, the seal includes a circular sealing gasket and an annular side integrally formed on the top of the circular sealing gasket, the annular side being located between the mounting portion and the inner wall of the annular cavity.

[0009] Preferably, the press-fit cover is an N-shaped cover, and a cavity is formed between the N-shaped cover and the circular sealing gasket.

[0010] Preferably, the mounting part is integrally formed with the bottom end of the N-shaped cover, the bottom of the mounting part is arc-shaped, and the bottom of the mounting part abuts against the top surface of the circular sealing gasket.

[0011] Preferably, the mounting portion is fixed between the annular side and the N-shaped cover by inward deformation and compression.

[0012] This utility model discloses a button battery casing structure, which has the following beneficial effects: By improving the stamping process of the press-fit casing, the cut of the press-fit casing is inclined outward when it is stamped from the blank. Then, during the casing forming process, its side is bent to form an inward bend. Thus, during assembly, the connection between the outer end of the mounting part and the burr presents an outward arc surface. This arc surface is in contact with the seal, thereby avoiding puncture caused by the burr contacting the seal, fundamentally improving the yield rate of button battery processing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded view of the overall structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the mounting part on the press-fit shell cover of this utility model.

[0017] In the figure: 1. Encased shell; 11. Positive electrode contact; 12. Annular cavity; 2. Press-fit shell cover; 21. N-shaped cover; 22. Mounting part; 23. Blade; 3. Seal; 31. Circular sealing gasket; 32. Annular side. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] This application provides a button cell housing structure that solves the problem that existing button cell negative electrode covers, after being stamped, develop outwardly expanding burrs at their edges, which can puncture the insulation layer during assembly and affect the battery yield.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] This utility model discloses a button battery casing structure.

[0022] According to the appendix Figure 1-3 As shown, it includes a housing 1 and a press-fit cover 2 mounted on the housing 1. A sealing element 3 is provided between the housing 1 and the press-fit cover 2. A mounting part 22 is provided on the outer side of the press-fit cover 2. The mounting part 22 is bent upward outward, and the bent part is inclined outward and abuts against the sealing element 3. An inwardly folded burr 23 is provided on the outer side of the mounting part 22. The burr 23 and the end of the mounting part 22 form an outward arc surface, and the arc surface contacts the sealing element 3.

[0023] By improving the stamping process of the press-fit cover 2, the cut of the press-fit cover 2 is made to be inclined outward when it is stamped from the blank. Then, during the shell forming process, its side is bent to form an inward bend. As a result, when assembling, the connection between the outer end of the mounting part 22 and the burr 23 presents an outward arc surface. This arc surface is pressed and contacts the seal 3, thereby avoiding puncture caused by the burr 23 contacting the seal 3, which fundamentally improves the yield rate of button battery processing.

[0024] The outer casing 1 is a positive electrode metal, the press-fit cover 2 is a negative electrode metal, and the sealing element 3 is an insulating rubber. The positive electrode metal is filled with battery core material, and the sealing element 3 plays a sealing and insulating role during the assembly of the outer casing 1 and the press-fit cover 2.

[0025] The casing 1 includes an annular cavity 12 and a positive electrode contact portion 11 integrally formed at the bottom end of the annular cavity 12. The sealing element 3 is installed on the inner top of the annular cavity 12. The positive electrode contact portion 11 is integrally stamped with the annular cavity 12, which provides better sealing and simplifies the processing method.

[0026] The sealing element 3 includes a circular sealing gasket 31 and an annular side 32 integrally formed on the top of the circular sealing gasket 31. The annular side 32 is located between the mounting part 22 and the inner wall of the annular cavity 12. The press-fit cover 2 is an N-shaped cover 21. A cavity is formed between the N-shaped cover 21 and the circular sealing gasket 31. In actual installation, the cavity will be filled with negative electrode material. The positive electrode material and the negative electrode material are separated by the circular sealing gasket 31.

[0027] The mounting part 22 is integrally formed with the bottom end of the N-shaped cover 21. The bottom of the mounting part 22 is arc-shaped and abuts against the top surface of the circular sealing gasket 31. The mounting part 22 is fixed between the annular side 32 and the N-shaped cover 21 by inward deformation and compression. Thus, the elastic potential energy of the deformation and bending part of the entire pressed shell cover 2 side is used to achieve an interference fit, ensuring tight installation and avoiding puncturing the seal 3.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A button battery casing structure, comprising a covering casing (1) and a press-fit casing cover (2) mounted on the covering casing (1), characterized in that, A sealing element (3) is provided between the covering shell (1) and the press-fit shell cover (2). An installation part (22) is provided on the outside of the press-fit shell cover (2). The installation part (22) is bent upward outward, and the bent part is inclined outward and abuts against the sealing element (3). An inwardly folded burr (23) is provided on the outside of the installation part (22). The burr (23) and the end of the installation part (22) form an outward arc surface. The arc surface contacts the sealing element (3).

2. The button battery casing structure according to claim 1, characterized in that: The encasing shell (1) is a positive electrode metal, the press-fit shell cover (2) is a negative electrode metal, and the sealing element (3) is insulating rubber.

3. The button battery casing structure according to claim 2, characterized in that: The encasing shell (1) includes an annular cavity (12) and a positive electrode contact portion (11) integrally formed at the bottom end of the annular cavity (12), and the sealing element (3) is installed on the inner top of the annular cavity (12).

4. The button battery casing structure according to claim 3, characterized in that: The sealing element (3) includes a circular sealing gasket (31) and an annular side (32) integrally formed on the top of the circular sealing gasket (31), the annular side (32) being located between the mounting part (22) and the inner wall of the annular cavity (12).

5. The button battery casing structure according to claim 4, characterized in that: The press-fit cover (2) is an N-shaped cover (21), and a cavity is formed between the N-shaped cover (21) and the circular sealing gasket (31).

6. The button battery casing structure according to claim 5, characterized in that: The mounting part (22) is integrally formed with the bottom end of the N-shaped cover (21). The bottom of the mounting part (22) is arc-shaped, and the bottom of the mounting part (22) abuts against the top surface of the circular sealing gasket (31).

7. A button battery casing structure according to claim 6, characterized in that: The mounting part (22) is fixed between the annular side (32) and the N-shaped cover (21) by inward deformation and pressing.

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