CN217009377U

CN217009377U - Button cell shell

Info

Publication number: CN217009377U
Application number: CN202220668529.0U
Authority: CN
Inventors: 李顺军; 张悦; 杨明富; 鄢德育; 陈海峰
Original assignee: Guizhou Zhongruifengtai New Energy Technology Co ltd
Current assignee: Guizhou Zhongruifengtai New Energy Technology Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-19
Anticipated expiration: 2032-03-24

Abstract

The utility model discloses a button battery shell, belonging to the technical field of batteries; the battery comprises a battery shell and a liquid injection plug, wherein the bottom of the battery shell is provided with a liquid injection hole; the shell around the liquid injection hole protrudes outwards, and an annular groove is formed in the bottom of the battery shell; the liquid injection plug comprises an annular sealing sheet and a protruding part, and the protruding part is matched with the liquid injection hole; the bulge is inserted into the liquid injection hole and is blocked; the annular sealing plate is connected with the outer bottom of the battery shell in a sealing mode through welding. The sealing mode of the liquid injection plug and the liquid injection hole has the advantages of good sealing effect, no occupation of the placing space of a battery cell and the like, and effectively improves the energy density of the whole battery.

Description

Button cell shell

Technical Field

The utility model relates to the field of button batteries, in particular to a button battery shell.

Background

Button cells, also commonly referred to as Button cells, refer to a type of battery that resembles a Button in shape. Button cells are typically relatively larger in diameter and relatively thinner in thickness. Because of its small size, button cells are often used in electronic devices with limited internal space, such as electronic watches and bluetooth headsets.

Button cells generally comprise a shell, a cover body, a winding core and the like; need inject electrolyte to casing inside after assembling casing, cap and book core, conventional mode passes through battery upper surface trompil and annotates liquid downwards, then encapsulates, if the mechanism and the measure of encapsulation do not in place, can influence button cell's sealed. The poor sealing effect is that water and gas enter the shell to corrode electrolysis and roll cores, so that the battery fails; in addition, conventional seal nail formula structure, notes liquid hole is inwards outstanding, utilizes to annotate the liquid stopper and plugs up and annotate the liquid hole, then the apron welding is sealed in order to accomplish in notes liquid hole outside, and this kind of notes liquid hole has occupied the space of placing of battery electricity core because inwards outstanding, needs bigger volume to lay battery electricity core, therefore can influence the whole energy density of battery, therefore needs to provide a new button cell casing to solve the technical problem that prior art exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a button cell shell which does not occupy the placing space of a cell core during the packaging process, is convenient for filling electrolyte and packaging after filling, and has good packaging tightness.

In order to solve the technical problems, the technical scheme of the utility model is as follows: a button battery shell comprises a battery shell body and a liquid injection plug, wherein a liquid injection hole is formed in the bottom of the battery shell body; the shell around the liquid injection hole protrudes outwards, and an annular groove is formed in the bottom of the battery shell; the liquid filling plug comprises an annular sealing sheet and a protruding part, and the protruding part is matched with the liquid filling hole; the bulge is inserted into the liquid injection hole and is blocked; the annular sealing plate is connected with the outer bottom of the battery shell in a sealing mode through welding.

Preferably, the annular sealing plate is welded to the bottom of the battery case by laser.

Preferably, the top end of the protruding part is flush with the inner bottom of the battery case.

Preferably, the liquid injection hole is 3-6cm away from the bottom edge of the battery shell.

Preferably, the annular sealing sheet and the bulge are of an integrally formed structure.

Preferably, the battery case has a hollow cylindrical shape or a hollow rectangular parallelepiped shape.

Compared with the prior art, the utility model has the beneficial effects that: the liquid injection hole is formed in the bottom of the battery shell, the shell around the liquid injection hole protrudes outwards, and the annular groove is formed in the bottom of the battery shell; when the liquid injection hole is sealed by the liquid injection plug, the liquid injection plug does not occupy the internal space of the battery shell and does not damage the battery cell, so that the battery cell is convenient to place in the battery shell; and moreover, the electrolyte injection hole can be well sealed after the electrolyte is injected, and the phenomenon that the battery fails due to the fact that water vapor enters the button battery is avoided.

In conclusion, the sealing mode of the liquid injection plug and the liquid injection hole has the advantages of good sealing effect, no occupation of the placing space of the battery cell and the like, and can improve the energy density of the whole battery.

Drawings

FIG. 1 is a schematic structural view of a button cell case according to the present invention;

fig. 2 is a partially enlarged view of a portion a of fig. 1.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in figures 1 to 2, the button cell shell comprises a cell shell 1 and a liquid injection plug 2, wherein in order to conveniently inject electrolyte into the cell shell 1, a liquid injection hole 11 is formed in the bottom of the cell shell 1, and the distance between the liquid injection hole 11 and the edge of the bottom of the cell shell 1 is 3-6 cm; as shown in fig. 2, the case around the pour hole 11 protrudes outward and forms an annular groove 12 in the bottom of the battery case 1; the liquid filling plug 2 comprises an annular sealing sheet 21 and a protruding part 22, wherein the annular sealing sheet 21 and the protruding part 22 are of an integrally formed structure, and the protruding part 22 is matched with the liquid filling hole 11; the convex part 22 is inserted into the liquid injection hole 11 and is blocked; the annular sealing sheet 21 and the outer bottom of the battery shell 1 are welded at the bottom of the battery shell 1 through laser, the connection mode effectively improves the sealing performance, prevents water vapor from entering the button battery due to improper sealing, and effectively improves the safety of the button battery; in addition, the shell around the liquid injection hole 11 protrudes outwards and forms an annular groove 12 in the bottom of the battery shell 1, and compared with the traditional mode of protruding towards the inside of the battery shell 1, the outward protrusion does not occupy the space of a battery winding core, so that the volume of the whole button battery is reduced, and the overall energy density of the battery is effectively improved.

In order to avoid the projections 22 damaging the battery cells or occupying the placement space of the battery cells, the tips of the projections 22 are flush with the inner bottom of the battery case 1.

The battery shell 1 is in a hollow cylinder shape or a hollow cuboid shape, when the battery shell 1 is in a hollow cylinder shape, the battery shell is in the shape of a conventional button battery, and a winding type battery cell is arranged in the battery shell 1; when the battery cell arranged in the hollow cuboid shape of the battery shell 1 is a laminated cell, the button battery is cuboid, and can be adapted to special environments.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model. Finally, it should be noted that the contents not described in detail in the specification belong to the prior art known to those skilled in the art, and those skilled in the art can implement the contents without creative efforts, so that the details are not described herein.

Claims

1. A button battery shell comprises a battery shell (1) and a liquid injection plug (2), and is characterized in that a liquid injection hole (11) is formed in the bottom of the battery shell (1); the shell around the liquid injection hole (11) protrudes outwards, and an annular groove (12) is formed in the bottom of the battery shell (1); the liquid injection plug (2) comprises an annular sealing sheet (21) and a protruding part (22), and the protruding part (22) is matched with the liquid injection hole (11); the bulge part (22) is inserted into the liquid injection hole (11) and is blocked; the annular sealing sheet (21) is connected with the outer bottom of the battery shell (1) in a sealing mode through welding.

2. Button cell housing according to claim 1, characterized in that the ring-shaped sealing plate (21) is laser welded to the bottom of the cell housing (1).

3. Button cell housing according to claim 1, characterized in that the top of the bulge (22) is flush with the inner bottom of the cell housing (1).

4. Button cell casing according to claim 1, characterized in that the liquid injection hole (11) is 3-6cm from the bottom edge of the cell casing (1).

5. Button cell housing according to claim 1, characterized in that the annular sealing plate (21) and the bulge (22) are of one-piece construction.

6. Button cell housing according to one of claims 1 to 5, characterized in that the cell housing (1) is hollow cylindrical or hollow cuboid.