CN214313282U

CN214313282U - Button cell

Info

Publication number: CN214313282U
Application number: CN202022842363.3U
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: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-09-28
Anticipated expiration: 2030-11-30

Abstract

The utility model discloses a button cell, through setting up the protecting crust, roll up core and elasticity center post, owing to roll up the core and have the centre bore in central point puts the department, first utmost point ear and second utmost point ear all stretch out from the position department that is close to the centre bore, and the elasticity center post possesses deformability for first utmost point ear and second utmost point ear can remove from the direction of centre bore in the past, let first utmost point ear and second utmost point ear can not occupy button cell too many inner space, can guarantee button cell's whole capacity 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.

Due to the miniaturization of electronic equipment, the internal installation space of the miniaturized electronic equipment is limited, so that a battery with small volume is needed to be adaptable, and a button battery is produced. Button cells are favored by a large number of electronic device manufacturers because of their small size and low capacity density. To current button cell, its composition part includes the steel can down, sealing washer and book core, it adopts the structure of rolling up the book core, the anodal ear and the negative pole ear of rolling up the core all draw forth from the outside position department of rolling up the core, consider follow-up button cell's welding, anodal ear and negative pole ear all must draw to button cell's central point, weld anodal ear and negative pole ear and button cell's upper and lower terminal surface again, consequently, just need buckle positive ear and negative pole ear and weld again, nevertheless positive ear and negative pole ear after buckling are owing to in the top of rolling up the core, anodal ear and negative pole ear occupy button cell's partial space, reduce button cell's inner space, and then limited button cell's whole capacity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing a button cell, its utmost point ear can not occupy too much spatial position, can guarantee button cell's whole capacity well.

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;

the winding core is provided with a central hole at the central position, a first lug and a second lug are arranged on the winding core, the first lug and the second lug both extend out from the positions close to the central hole, the first lug is positioned on one side of the winding core and is connected with the upper end face, the second lug is positioned on the other side of the winding core, and the second lug is connected with the lower end face; and

the elastic central column is arranged in the central hole, one end of the elastic central column props against the first lug to the upper end face, and the other end of the elastic central column props against the second lug to the lower end face.

In one embodiment, the elastic central column is a rubber elastic central column.

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

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

In one embodiment, the winding core comprises two electrode winding core belts and two membrane belts, the first tab is disposed on one end of one of the electrode winding core belts, the second tab is disposed on one end of the other electrode winding core belt, the two electrode winding core belts and the two membrane belts are used for being stacked in a staggered manner and wound to form the winding core with one end of the electrode winding core belt as a starting point, so that the winding core wound out has the central hole at a central position, and the first tab and the second tab both extend out from positions close to the central hole.

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 the winding core before being unwound 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, a winding core 200, and an elastic central post 300.

In this way, it should be noted that the protective shell 100 plays a role in encapsulating the button cell and also plays a role in protecting internal structural components of the button cell 10; the winding core 200 plays roles of electric energy storage and electric energy output and is a core structural member of the button cell 10; the elastic central column 300 is used to ensure that the inner ring structure of the winding core 200 is more stable, and meanwhile, the contact between the tab and the protective shell 100 is more stable.

Referring to fig. 1, the protective shell 100 has an upper end surface 10a and a lower end surface 10 b.

In this way, it should be noted that the protective casing 100 has an upper end face 10a and a lower end face 10b, and the upper end face 10a and the lower end face 10b are positions for leading out the total positive electrode and the total negative electrode of the button cell 10.

Referring to fig. 3 of the tab of fig. 2, the core 200 has a central hole 210 at a central position, the core 200 is provided with a first tab 220 and a second tab 230, the first tab 220 and the second tab 230 both extend from positions close to the central hole 210, the first tab 220 is located at one side of the core 200, the first tab 220 is connected to the upper end surface 10a, the second tab 230 is located at the other side of the core 200, and the second tab 230 is connected to the lower end surface 10 b.

Thus, it should be noted that the central hole 210 is provided for accommodating the elastic central pillar 300; the first tab 220 and the second tab 230 are output electrodes of the jellyroll 200.

Referring to fig. 2, the elastic central pillar 300 is disposed in the central hole 210, one end of the elastic central pillar 300 supports the first tab 220 to the upper end surface 10a, and the other end of the elastic central pillar 300 supports the second tab 230 to the lower end surface 10 b.

So, it should be noted that, because core 200 has center hole 210 in central position, first utmost point ear 220 and second utmost point ear 230 all stretch out from the position that is close to center hole 210, and elasticity center post 300 possesses deformability for first utmost point ear 220 and second utmost point ear 230 can move toward center hole 210's direction, let first utmost point ear 220 and second utmost point ear 230 can not occupy button cell 10 too much inner space, can guarantee button cell 10's whole capacity well.

It should be further noted that, due to the arrangement of the elastic central pillar 300, one end of the elastic central pillar 300 supports the first tab 220 against the upper end surface 10a, and the other end of the elastic central pillar 300 supports the second tab 230 against the lower end surface 10b, so that the contact reliability between the first tab 220 and the upper end surface 10a can be greatly improved, and the contact reliability between the second tab 230 and the lower end surface 10b can also be improved.

It should be further noted that the exposed length and width of the first tab 220 do not exceed the diameter of the central hole 210, and the exposed length and width of the second tab 230 do not exceed the diameter of the central hole 210, so that the projection plane of the first tab 220 toward the central hole 210 and the projection plane of the second tab 230 toward the central hole 210 can both completely fall into the central hole 210, the first tab 220 and the second tab 230 can not occupy too much internal space of the button cell 10, and the overall capacity of the button cell 10 can be well ensured.

Further, in one embodiment, the elastic center post 300 is a rubber elastic center post.

In this way, it should be noted that the elastic central pillar 300 made of rubber material enables the elastic central pillar 300 to have good deformation capability, so as to ensure the contact reliability between the first tab 220 and the upper end surface 10a, the contact reliability between the second tab 230 and the lower end surface 10b, and the stability of the inner ring structure of the winding core 200.

Further, referring again to fig. 2, in one embodiment, the protective shell 100 includes an upper steel shell 110, a lower steel shell 120, and a sealing ring 130, so

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 core cavity, the core 200 is located in the core cavity, the seal ring 130 is disposed between the upper steel shell 110 and the lower steel shell 120, the upper end surface 10a is disposed on the upper steel shell 110, and the lower end surface 10b is disposed on the lower steel shell 120.

Thus, it should be noted that both the upper steel shell 110 and the lower steel shell 120 play a role in protection; the sealing ring 130 plays a role in sealing, so as to prevent electrolyte inside the button cell 10 from leaking, and prevent conductive media such as external water from entering the inside of the button cell 10, thereby causing short circuit of the button cell 10. Specifically, the seal ring 130 is a rubber seal ring.

Further, referring again to fig. 3, in one embodiment, the winding core 200 includes two electrode core winding tapes 240 and two separator tapes 250, wherein the first tab 220 is disposed on one end of one of the electrode core winding tapes 240, the second tab 230 is disposed on one end of the other electrode core winding tape 240, and the two electrode core winding tapes 240 and the two separator tapes 250 are disposed in a staggered stacked arrangement and wound around one end of the electrode core winding tapes 240 to form the winding core 200, such that the wound winding core 200 has a central hole 210 at a central position, and both the first tab 220 and the second tab 230 protrude from positions close to the central hole 210.

Thus, it should be noted that the winding core 200 includes two electrode winding core tapes 240 and two separator tapes 250, the first tab 220 is disposed on one end of one electrode winding core tape 240, the second tab 230 is disposed on one end of the other electrode winding core tape 240, and then the following stacking sequence is followed: the electrode core winding tape 240, the separator tape 250, the electrode core winding tape 240 and the separator tape 250 are sequentially stacked and then wound with one end of the electrode core winding tape 240 as a starting point to form the core 200, the wound core 200 has a central hole 210 at a central position, and the first tab 220 and the second tab 230 are both protruded from positions close to the central hole 210.

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;

2. The button cell of claim 1, wherein said elastic center post is a rubber elastic center post.

3. 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 jointly enclose a roll core cavity, the roll core is located in the roll core cavity, the sealing ring is disposed between the upper steel shell and the lower steel shell, the upper end surface is disposed on the upper steel shell, and the lower end surface is disposed on the lower steel shell.

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

5. The button cell as set forth in claim 1, wherein the winding core comprises two electrode core winding tapes and two separator tapes, the first tab is disposed on one end of one of the electrode core winding tapes, the second tab is disposed on one end of the other electrode core winding tape, the two electrode core winding tapes and the two separator tapes are disposed in a staggered stacked arrangement and wound to form the winding core starting from one end of the electrode core winding tape, so that the wound winding core has the central hole at a central position, and the first tab and the second tab both protrude from positions close to the central hole.