CN216389475U

CN216389475U - Button cell with positive electrode ring

Info

Publication number: CN216389475U
Application number: CN202121647041.1U
Authority: CN
Inventors: 王建; 王保军; 夏青; 阮保红; 许杰康; 官守敏
Original assignee: Yichang Lijia Technology Co ltd
Current assignee: Yichang Lijia Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-04-26
Anticipated expiration: 2031-07-19

Abstract

The utility model discloses a button cell with an anode ring, which comprises a cathode cover, an anode shell, a sealing ring, an anode, a diaphragm, a cathode and electrolyte, wherein the sealing ring is hermetically connected with the cathode cover and the anode shell and enables the cathode cover and the anode shell to form a sealed cavity; the button cell also comprises an anode ring arranged in the anode shell; the positive electrode ring comprises a bottom wall and a side wall, the bottom wall is arranged on the inner wall of the positive electrode shell, the side wall forms an inner ring, and the positive electrode is positioned in the inner ring; so, the inner ring can form the fixed stay to the positive pole, has improved the overall stability of battery, and diapire and anodal shells inner wall can in close contact with, through the mode of side mass flow like this, have guaranteed that battery inside has good conductivity, have promoted the load capacity of battery under normal atmospheric temperature or high temperature for the battery can work in the higher temperature.

Description

Button cell with positive electrode ring

Technical Field

The utility model relates to the field of button cells, in particular to a button cell with a positive electrode ring.

Background

Button cell batteries have been widely used as power sources in various miniature electronic products due to their characteristics of portability, small size, etc. Generally, a button cell includes a positive casing, a negative cover, and a cell and an electrolyte disposed in a sealed cavity formed between the positive casing and the negative cover, wherein the positive electrode, the separator, and the negative electrode are stacked in sequence and then folded or unfolded to form the cell. However, the positive casing and the negative cover of the button cell generally have relative displacement and leakage during the packaging process and the use process of the button cell, which not only reduces the overall stability and leakage performance of the cell, but also shortens the service life of the cell. In addition, the button cell battery usually adopts a cylindrical positive electrode, and if the cylindrical positive electrode expands during use, the end surface of the cylindrical positive electrode presses the diaphragm, so that the diaphragm is easy to break, and the service life of the battery is also shortened.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present invention provide a button cell with a positive electrode ring, which can improve the overall stability, storage stability, consistency, and liquid leakage resistance of the cell, and prolong the service life of the cell.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the embodiment of the utility model provides a button cell with an anode ring, which comprises a cathode cover, an anode shell, a sealing ring, an anode, a diaphragm, a cathode and electrolyte, wherein the sealing ring is connected with the cathode cover and the anode shell in a sealing manner and enables the cathode cover and the anode shell to form a sealing cavity; the button cell also comprises an anode ring arranged in the anode shell; the positive ring comprises a bottom wall and a side wall, the bottom wall is arranged on the inner wall of the positive shell, the side wall forms an inner ring, and the positive electrode is located in the inner ring.

The positive electrode is of a boss structure or the end face of the positive electrode is provided with a chamfer.

Wherein the chamfer comprises a fillet or a chamfer.

The end face comprises an upper end face and a lower end face, the end face of the positive electrode close to the diaphragm is the upper end face, and the end face of the positive electrode close to the positive electrode shell is the lower end face.

Wherein, the external diameter of the bottom wall is matched with the internal diameter of the positive electrode shell.

The embodiment of the utility model provides a button cell with an anode ring, which comprises a cathode cover, an anode shell, a sealing ring, an anode, a diaphragm, a cathode and electrolyte, wherein the sealing ring is connected with the cathode cover and the anode shell in a sealing manner and enables the cathode cover and the anode shell to form a sealing cavity; the button cell also comprises an anode ring arranged in the anode shell; the positive electrode ring comprises a bottom wall and a side wall, the bottom wall is arranged on the inner wall of the positive electrode shell, the side wall forms an inner ring, and the positive electrode is positioned in the inner ring; therefore, the inner ring can form a fixed support for the anode, the overall stability of the battery is improved, the mechanical strength of the battery is correspondingly improved, and the battery can work at a higher temperature; the boss structure of the positive electrode enables the periphery of the boss convex part to be used as an expansion space when the positive electrode expands, so that the boss convex part has expansion space in all directions.

Drawings

Fig. 1 is a schematic structural diagram of a button cell with a positive electrode ring according to an embodiment of the utility model;

fig. 2 is a schematic structural diagram of the positive electrode ring in an embodiment of the present invention.

Detailed Description

For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 2, a button cell provided in an embodiment of the present invention includes a negative electrode cover 1, a positive electrode case 2, a sealing ring 3, a positive electrode 4, a diaphragm 5, a negative electrode 6, and an electrolyte, where the sealing ring 3 is hermetically connected to the negative electrode cover 1 and the positive electrode case 2, and the negative electrode cover 1 and the positive electrode case 2 form a sealed cavity, and the positive electrode 4, the diaphragm 5, the negative electrode 6, and the electrolyte are disposed in the sealed cavity; the button cell further comprises an anode ring arranged in the anode shell 2; the positive ring comprises a bottom wall 8 and a side wall 9, the bottom wall 8 is arranged on the inner wall of the positive shell 2, the side wall 9 forms an inner ring, and the positive electrode is located in the inner ring.

Here, the positive electrode 4 may be chamfered only at the upper end surface or may be chamfered neither at the upper end surface nor at the lower end surface. The positive electrode ring can be fixedly connected with the positive electrode shell 2, and the positive electrode 4 can be fixedly connected with the positive electrode ring.

Therefore, the inner ring can form a fixed support for the anode, the overall stability of the battery is improved, the mechanical strength of the battery is correspondingly improved, and the battery can work at a higher temperature; the boss structure of the positive electrode enables the periphery of the boss convex part to be used as an expansion space when the positive electrode expands, so that the boss convex part has expansion space in all directions.

In one embodiment, the positive electrode 4 has a boss structure or the end surface of the positive electrode 4 is provided with a chamfer.

Here, as an alternative embodiment, the positive electrode 4 is of a unidirectional boss structure, and the lower end surface is provided with a rounded corner. As another alternative, the positive electrode 4 is a bidirectional boss structure. As a further alternative embodiment, the upper end surface and the lower end surface of the positive electrode 4 are both provided with rounded corners. The positive electrode 4 may have a chamfered portion only on the upper end surface or may have no chamfered portions on both the upper and lower end surfaces.

In an embodiment, the chamfer comprises a fillet or a chamfer.

In one embodiment, the end face includes an upper end face and a lower end face, the end face of the positive electrode 4 close to the separator is the upper end face, and the end face of the positive electrode close to the positive electrode casing is the lower end face.

In one embodiment, the outer diameter of the bottom wall 8 is adapted to the inner diameter of the positive electrode casing 2.

It is understood that the structures of the negative electrode cover 1, the positive electrode shell 2, the sealing ring 3, the separator 5, the negative electrode 6, and the like may be substantially the same as the structures of the corresponding components in the existing button cell, and will not be described in detail in this embodiment. The positive electrode 4 is partially located in the inner ring of the positive electrode ring, which is understood to mean that the positive electrode 4 is located in the inner ring of the positive electrode ring and protrudes from the positive electrode ring. The lower end surface of the positive electrode 4 faces the inside of the positive electrode case 2, the upper end surface faces the separator 5, the lower end surface of the negative electrode 6 faces the separator 5, and the upper end surface faces the inside of the negative electrode cover 1. The positive electrode 4 may be made of a positive electrode material such as manganese dioxide; the separator 5 may be a fibrous membrane or the like to separate the positive electrode 4 and the negative electrode 6 and be capable of adsorbing the electrolytic solution; the negative electrode 6 may be made of a negative electrode material such as lithium. The cathode cover 1 and the anode casing 2 are both circular cover structures made of metal materials, and the sealing ring 3 may be made of an insulating material with sealing performance, such as an annular plastic ring or an annular rubber ring. The diameter of the separator 5 is larger than not only the diameter of the cross section of the positive electrode 4 but also the diameter of the cross section of the negative electrode 6 to ensure that the positive electrode 4 and the negative electrode 6 can be completely separated.

Here, since both the bottom wall 8 and the side wall 9 are not easily deformed when receiving pressure, it can be ensured that no relative displacement occurs between the positive electrode ring and the positive electrode case 2, that is, between the positive electrode 4, the positive electrode ring 7 and the positive electrode case 2, and the overall stability of the battery and the quality of the battery are improved. In addition, the design that the lug boss structure or the end face of the positive electrode 4 is provided with the chamfer enables the positive electrode 4 to be used as an expansion space around the corresponding lug boss convex part and around the chamfer if the positive electrode 4 expands in the using process, namely, the positive electrode 4 has an expansion room when expanding, the defect that the diaphragm 5 is burst due to the expansion of the positive electrode 4 is effectively avoided, and the service life of the battery is prolonged.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention are included in the protection scope of the present invention.

Claims

1. A button cell with an anode ring comprises a cathode cover, an anode shell, a sealing ring, an anode, a diaphragm, a cathode and electrolyte, wherein the sealing ring is connected with the cathode cover and the anode shell in a sealing manner and enables the cathode cover and the anode shell to form a sealing cavity; the button cell is characterized by also comprising an anode ring arranged in the anode shell; the positive ring comprises a bottom wall and a side wall, the bottom wall is arranged on the inner wall of the positive shell, the side wall forms an inner ring, and the positive electrode is located in the inner ring.

2. The button cell with positive electrode ring according to claim 1, wherein the positive electrode is a boss structure or the end face of the positive electrode is provided with a chamfer.

3. The button cell with positive electrode ring according to claim 2, wherein said chamfer comprises a rounded corner or a beveled corner.

4. The button cell with positive electrode ring according to claim 2, wherein said end face comprises an upper end face and a lower end face, the end face of the positive electrode close to the separator is said upper end face, and the end face of the positive electrode close to the positive electrode shell is said lower end face.

5. The button cell with positive electrode ring according to claim 1, wherein the outer diameter of the bottom wall is adapted to the inner diameter of the positive electrode casing.