CN214099661U

CN214099661U - Button cell

Info

Publication number: CN214099661U
Application number: CN202022482021.5U
Authority: CN
Inventors: 黄培英; 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-08-31
Anticipated expiration: 2030-10-30

Abstract

The utility model discloses a button cell, through setting up the protecting crust and rolling up the core, in the application of reality, because first utmost point ear and/or second utmost point ear are drawn forth from the central point that rolls up the core and put, even roll up the core and take place the inflation because of unexpected factor, the outside pole piece is expanded for the inboard pole piece is easy, the outside pole piece is because of not having first utmost point ear and second utmost point ear to its dragging, can the cracked risk of greatly reduced outside pole piece, even the fracture takes place for the outside pole piece, cracked degree also can be relatively lower, button cell's internal resistance just can not sharply increase yet, button cell's normal use can be guaranteed well.

Description

Button cell

Technical Field

The utility model relates to a battery technology field especially relates to a button cell.

Background

Currently, a battery refers to a device that converts chemical energy into electrical energy in a portion of the space of a cup, tank, or other container or composite container that holds an electrolyte solution and metal electrodes to generate an electric current. Has a positive electrode and a negative electrode. The performance parameters of the battery are mainly electromotive force, capacity, specific energy and resistance. The battery is used as an energy source, can obtain current which has stable voltage and current, is stably supplied for a long time and is slightly influenced by the outside, has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects of modern social life.

Batteries are various in kind, for example, there are cylindrical batteries; as another example, a square battery; another example is a button cell. The button cell is called as a button cell because of its shape similar to that of a button as the name suggests, and the button cell is widely applied to various industries because of its small volume. Button cell on the present market constitutes including last box hat, lower box hat, sealing washer, book core etc. wherein button cell's book core is ordinary to be adopted and is the structure of rewinding, rolls up the utmost point ear of core promptly and all in the outside of rolling up the core, and utmost point ear passes through welded mode and button cell's upper and lower terminal surface and is connected.

Above-mentioned button cell's roll up core structure has following problem, because utmost point ear is located the outside of rolling up the core, rolls up the position department that core diameter is the biggest promptly, if roll up when the core takes place the inflation because of unexpected factor diameter, the pole piece that is located the outside can receive utmost point ear to its power of dragging, and then leads to being located the pole piece in the outside and take place cracked problem, in case take place above-mentioned problem, button cell's internal resistance will sharply increase, leads to the unable normal charge-discharge of button cell, seriously influences button cell's normal use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing a utmost point ear is located central point and puts the department, and the difficult button cell who takes place the phenomenon of splitting because of the inflation of rolling up the core of pole piece.

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

a button cell, comprising:

a protective shell having an upper end surface and a lower end surface; and

roll up the core, roll up the core set up in the protective housing, roll up the core and include a plurality of pole pieces and a plurality of spacing block, each pole piece and each the spacing block is crisscross to be piled up and is convoluteed and form roll up the core, it has first utmost point ear and second utmost point ear to roll up the core, first utmost point ear and/or the second utmost point ear is followed the central point of rolling up the core puts the department and draws forth, first utmost point ear with the up end is connected, the second utmost point ear with the lower terminal surface is connected.

In one embodiment, the protective shell comprises an upper steel shell, a lower steel shell and a sealing ring, wherein the upper steel shell is arranged in the lower steel shell, the upper steel shell and the lower steel shell jointly enclose a sealed cavity, the winding core is positioned in the sealed cavity, the sealing ring is embedded between the upper steel shell and the lower steel shell, the upper end face is positioned on the upper steel shell, and the lower end face is positioned on the lower steel shell.

In one embodiment, the seal ring is a rubber seal ring.

In one embodiment, a first bent portion is disposed on the first tab.

In one embodiment, a second bent portion is disposed on the second tab.

The utility model discloses compare in prior art's advantage and beneficial effect as follows:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 present invention;

fig. 2 is a schematic view of an internal structure of a button cell according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a core before interleaving and stacking according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a winding core before bending the first tab and the second tab according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a winding core after bending the first tab and the second tab according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The 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 invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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 2, a button cell 10 includes a protective shell 100 and a winding core 200.

Thus, it should be noted that the protective shell 100 plays a role of protection, protecting structural members inside the button cell 10; the winding core 200 functions as a voltage storage and a voltage output.

Referring to fig. 2, the protective shell 100 has an upper end surface 10a and a lower end surface 10 b.

In this way, the protective case 100 has an upper end face 10a and a lower end face 10b, the output electrodes of the button cells 10 are drawn from the upper end face 10a and the lower end face 10b, and if the positive electrodes of the button cells 10 are drawn from the upper end face 10a, the negative electrodes of the button cells 10 are drawn from the lower end face 10 b; when the negative electrode of the button cell 10 is drawn from the upper end face 10a, the positive electrode of the button cell 10 is drawn from the lower end face 10 b.

Referring to fig. 2, 3 and 4, the winding core 200 is disposed in the protective shell 100, the winding core 200 includes a plurality of pole pieces 210 and a plurality of spacers 220, each pole piece 210 and each spacer 220 are stacked and wound in an interlaced manner to form the winding core 200, the winding core 200 has a first tab 230 and a second tab 240, the first tab 230 and/or the second tab 240 is led out from a central position of the winding core 200, the first tab 230 is connected to the upper end surface 10a, and the second tab 240 is connected to the lower end surface 10 b.

Thus, it should be noted that the winding core 200 includes a plurality of pole pieces 210 and a plurality of spacers 220, the pole pieces 210 are subdivided into positive pole pieces and negative pole pieces, when the winding core 200 is formed by interleaving and winding, the winding core 200 is formed by interleaving and winding the spacer 220, the positive pole pieces, the spacer 220 and the negative pole pieces, or the winding core 200 is formed by interleaving and winding the spacer 220, the negative pole pieces, the spacer 220 and the positive pole pieces, and the spacer 220 serves to prevent the positive pole pieces and the negative pole pieces from short-circuiting.

It should be further noted that, because the first tab 230 and/or the second tab 240 are/is led out from the central position of the winding core 200, even if the winding core 200 expands due to an unexpected factor, the outer pole piece 210 is easy to expand relative to the inner pole piece 210 (the inner pole piece 210 is difficult to expand inward due to a small space, and the outer pole piece 210 is easy to expand outward, so the outer pole piece 210 is more easily broken compared with the inner pole piece 210), the outer pole piece 210 can greatly reduce the risk of breaking the outer pole piece 210 because the first tab 230 and the second tab 240 do not pull the outer pole piece, even if the outer pole piece 210 breaks, the degree of breaking is relatively low, the internal resistance of the button cell 10 is not rapidly increased, and the normal use of the button cell 10 can be well ensured. It should be noted that the first tab 230 and/or the second tab 240 are/is led out from the central position of the winding core 200, that is, both the first tab 230 and the second tab 240 are led out from the central position of the winding core 200, or one of the first tab 230 and the second tab 240 is led out from the central position of the winding core 200, preferably both the first tab 230 and the second tab 240 are led out from the central position of the winding core 200, which can improve the safety and reliability of the button cell 10 to the maximum extent.

Further, referring to fig. 2 again, in an embodiment, the protective shell 100 includes an upper steel shell 110, a lower steel shell 120 and a sealing ring 130, the upper steel shell 110 is disposed in the lower steel shell 120, the upper steel shell 110 and the lower steel shell 120 together enclose a sealed cavity, the winding core 200 is located in the sealed cavity, the sealing ring 130 is embedded between the upper steel shell 110 and the lower steel shell 120, the upper end surface 10a is located on the upper steel shell 110, and the lower end surface 10b is located on the lower steel shell 120.

Therefore, it should be noted that the upper steel shell 110 and the lower steel shell 120 both play a role in protection, so as to prevent internal structural components of the button cell 10 from being damaged; the sealing ring 130 serves to seal and prevent water from entering the interior of the button cell 10, which could lead to short-circuiting of the button cell 10.

Further, in one embodiment, the seal ring 130 is a rubber seal ring.

As described above, the material for making the seal ring 130 is preferably rubber, but the seal ring 130 may be made of other materials having waterproof and sealing properties on the market.

Further, referring to fig. 5, in an embodiment, a first bending portion 231 is disposed on the first tab 230.

In this way, the first bent portion 231 is provided to increase the contact area between the first tab 230 and the upper end surface 10a, so that the first tab 230 can be better connected to the upper end surface 10a when the first tab 230 is welded, thereby improving the welding reliability.

Further, referring to fig. 5 again, in an embodiment, a second bending portion 241 is disposed on the second tab 240.

In this manner, the second bent portion 241 can increase the contact area between the second tab 240 and the lower end surface 10b, and when the second tab 240 is welded, the second tab 240 can be better connected to the lower end surface 10b, thereby improving the welding reliability.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A button cell, comprising:

a protective shell having an upper end surface and a lower end surface; and

2. The button cell according to claim 1, wherein the protective shell comprises an upper steel shell, a lower steel shell and a sealing ring, the upper steel shell is disposed in the lower steel shell, the upper steel shell and the lower steel shell together enclose a sealed cavity, the winding core is located in the sealed cavity, the sealing ring is embedded between the upper steel shell and the lower steel shell, the upper end surface is located on the upper steel shell, and the lower end surface is located on the lower steel shell.

3. The button cell according to claim 2, wherein the sealing ring is a rubber sealing ring.

4. The button cell according to claim 1, wherein a first bent portion is provided on the first tab.

5. The button cell according to claim 1, wherein a second bent portion is provided on the second tab.