CN216213748U

CN216213748U - Outer steel shell and button cell

Info

Publication number: CN216213748U
Application number: CN202120273298.9U
Authority: CN
Inventors: 杨昆仑; 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-04-05
Anticipated expiration: 2031-01-29

Abstract

According to the outer steel shell and the button battery, the air holes are formed in the side wall of the shell, when the button battery is assembled, the outer steel shell, the inner steel shell, the sealing rubber ring and the electric core are assembled together, gas in the button battery is exhausted through the air holes, the outer steel shell can be stably fastened on the inner steel shell under the action of air pressure, and the outer steel shell is not provided with a turned edge structure and the inner steel shell is not provided with a step structure, so that the inner space of the button battery cannot be occupied, and the electric energy density of the button battery is influenced; in addition, the button cell can be assembled on the outer steel shell without applying force, so that the assembly process is simpler and more convenient.

Description

Outer steel shell and button cell

Technical Field

The utility model relates to the technical field of batteries, in particular to an outer steel shell and a button battery.

Background

Button cells, also known as button cells, are generally larger in diameter and thinner in size, and are similar to a small button. The button cell is classified from the appearance, and the same corresponding cell is classified into a cylindrical cell, a square cell and a special-shaped cell. The button cell is very suitable for electronic devices with limited internal assembly space due to the tiny volume, for example, the button cell is used for supplying power for electronic watches; for another example, the bluetooth headset may also be powered by a button cell.

The button cell comprises four large structural components, namely an inner steel shell, an outer steel shell, a sealing ring and an electric core, wherein in order to guarantee the overall sealing performance of the button cell, the outer steel shell is provided with a turned edge structure, the corresponding inner steel shell is provided with a step structure, and the outer steel shell is fastened on the inner steel shell by utilizing the mutual matching of the turned edge structure and the step structure, so that the button cell is assembled. Although the assembly of the button cell can be well realized by adopting the structure, and the tightness of the button cell is ensured, the following defects still exist:

firstly, the outer steel shell needs to be provided with a turned edge structure, and the inner steel shell needs to be provided with a step structure, so that when the battery cell is arranged in the button battery, the structure can occupy the internal space of some button batteries, further the whole capacity of the button battery is limited, and the electric energy density of the button battery is greatly reduced;

secondly, the matching of the edge-curling structure and the step structure is adopted, the outer steel shell needs to be pressed onto the inner steel shell in the assembling process, and once the force applied to the outer steel shell is too large, the button cell is easily damaged; furthermore, since the assembly can be completed by applying force above the outer steel shell, an external device or tool is required, which undoubtedly greatly affects the assembly efficiency of the button cell.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides an outer steel shell and a button cell which can not occupy the internal installation space, can ensure the electric energy density and enable the assembly process to be simpler and more convenient.

The purpose of the utility model is realized by the following technical scheme:

an outer steel shell comprising:

the shell is of an upper end opening structure, and at least more than one air hole is formed in the position of the side wall of the shell.

In one embodiment, the housing is provided with 3 to 4 air holes at the position of the side wall, and two adjacent air holes are provided with a space.

In one embodiment, each of the air holes is circumferentially distributed around the center of the housing.

In one embodiment, each of the air holes is axially symmetrically distributed around the center of the shell.

In one embodiment, the air holes are round holes.

In one embodiment, the pores have a diameter in the range of [1mm, 2mm ].

In one embodiment, the air holes are square holes.

In one embodiment, the air holes are kidney-shaped holes.

A button cell, including above-mentioned outer steel casing, still include: interior steel casing, sealed rubber ring and electric core, interior steel casing set up in the casing, sealed rubber ring inlays to be arranged in between interior steel casing and the casing, electric core set up in the casing, just electric core respectively with the casing with interior steel casing is connected.

Compared with the prior art, the utility model at least has the following advantages and beneficial effects:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an assembly structure of a button cell according to an embodiment of the utility model;

fig. 2 is an exploded view of a button cell in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an outer steel shell in another embodiment of the present invention;

fig. 4 is a schematic structural view of an outer steel shell according to still another embodiment of the present invention.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and fig. 2, a button cell 10 includes an outer steel shell 100, the outer steel shell 100 includes a casing 110, the casing 110 has an upper end opening structure, the casing 110 is provided with at least one air hole 111 at a side wall position, and the button cell further includes: interior steel casing 200, rubber seal 300 and electricity core 400, interior steel casing 200 sets up in casing 110, and rubber seal 300 inlays between interior steel casing 200 and casing 110, and electricity core 400 sets up in casing 110, and electricity core 400 is connected with casing 110 and interior steel casing 200 respectively.

Therefore, it should be noted that, since the air hole 111 is formed in the side wall of the casing 110, when the button cell 10 is assembled, the outer steel shell 100, the inner steel shell 200, the sealing rubber ring 300 and the battery core 400 are assembled together, and the air inside the button cell 10 is exhausted through the air hole 111, the outer steel shell 100 can be stably fastened to the inner steel shell 200 under the action of air pressure, and since the outer steel shell 100 is not provided with the curled edge structure, the inner steel shell 200 is not provided with the step structure, the inner space of the button cell 10 is not occupied, and the electric energy density of the button cell 10 is not affected; in addition, since the button cell 10 can be assembled without applying force to the external steel shell 100, the assembly process can be more simple and convenient.

It should be further noted that, in the button cell 10 of the present application, when the electrical core 400 is short-circuited to increase the internal pressure of the button cell 10, under the action of the internal pressure, the internal pressure can push the inner steel shell 200 to move the inner steel shell 200 upward, and when the inner steel shell 200 moves out of the position of the air hole 111, the sealing effect of the sealing rubber ring 300 will fail, so as to implement the self-pressure relief of the button cell 10.

It should be noted that, in the prior art, after the button battery is assembled, a step of vacuumizing is required, generally, vacuumizing is performed from an extrusion gap between the outer steel shell and the rubber ring, and in general, during the vacuumizing, after the electrolyte is injected, the outer steel shell is assembled, extruded through a gap between the outer steel shell and the rubber ring, and then the outer steel shell is extruded for sealing. The thickness of the rubber ring is certainly smaller than the clearance between the inner steel shell and the outer steel shell to realize interference fit, so the difficulty is higher during vacuum pumping. However, for the button cell of the present application, since the air hole 111 is formed in the outer steel shell 100, that is, the mode of opening the side wall can exhaust the internal air in the cavity of the button cell 10 through the air hole, the exhaust path of the button cell 10 can be greatly shortened, the problem of vacuum exhaust after the button cell 10 is assembled can be better solved, and meanwhile, the exhaust effect is better.

Further, referring to fig. 4, the housing 110 is provided with 3 to 4 air holes 111 at the side wall, and two adjacent air holes 111 are provided with a space.

As described above, the number of the air holes 111 can be flexibly set according to actual conditions, and is preferably 3 to 4.

Further, in one embodiment, the air holes 111 are circumferentially distributed about the center of the housing 110.

In this way, the design that the air holes 111 are circumferentially distributed around the center of the casing 110 can make the whole casing 110 uniformly stressed and improve the assembly stability.

Further, in one embodiment, the air holes 111 are axially symmetrically distributed about the center of the housing 110.

In this way, it should be noted that, the design that the air holes 111 are axially symmetrically distributed around the center of the casing 110 can also make the whole casing 110 uniformly stressed, thereby improving the assembly stability.

Further, referring to fig. 3, in one embodiment, the air hole 111 is a circular hole.

In this manner, when the air hole 111 is a circular hole, the diameter of the air hole 111 is in the range of [1mm, 2mm ].

Further, referring to fig. 4 again, in one embodiment, the air hole 111 is a square hole.

As described above, the shape of the air hole 111 may be a square hole, and if the air hole 111 is a square hole, a rounded portion is preferably provided on the inner wall of the air hole 111 to prevent the seal rubber 300 from being damaged when the seal rubber 300 is assembled.

Further, referring to fig. 2 again, in one embodiment, the air holes 111 are kidney-shaped holes.

In this way, the shape of the air holes 111 may be a waist-shaped hole, the shape of the air holes 111 may be set according to actual conditions,

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An outer steel shell, comprising:

the shell is of an upper end opening structure, and at least more than one air hole is formed in the position of the side wall of the shell; the air holes are distributed in the center of the shell in a circumferential mode.

2. The outer steel shell according to claim 1, wherein the shell is provided with 3 to 4 air holes at the position of the side wall, and a space is arranged between two adjacent air holes.

3. The outer steel shell according to claim 2, wherein the air holes are distributed in axial symmetry about a center of the shell.

4. The outer steel shell of claim 1, wherein the air holes are round holes.

5. An outer steel shell according to claim 4, wherein the pores have a diameter in the range of [1mm, 2mm ].

6. The outer steel shell of claim 1, wherein the air holes are square holes.

7. The outer steel shell of claim 1, wherein the air holes are kidney-shaped holes.

8. A button cell, comprising the outer steel shell according to any one of claims 1 to 7, and further comprising: interior steel casing, sealed rubber ring and electric core, interior steel casing set up in the casing, sealed rubber ring inlays to be arranged in between interior steel casing and the casing, electric core set up in the casing, just electric core respectively with the casing with interior steel casing is connected.