CN215578779U

CN215578779U - Sealing structure of button cell

Info

Publication number: CN215578779U
Application number: CN202121153420.5U
Authority: CN
Inventors: 代东举; 刘瑞霞; 向德波; 翟六恒; 宋志新
Original assignee: Tianneng New Energy Huzhou Co ltd
Current assignee: Tianneng New Energy Huzhou Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-01-18
Anticipated expiration: 2031-05-26

Abstract

The utility model discloses a sealing structure of a button battery, which comprises an upper cover, a lower cover, a support ring and a sealing ring, wherein the upper cover and the lower cover have the same structure; the support ring is divided into a first sealing section, an insulating section and a second sealing section, the upper cover is connected and wrapped with the first sealing section, and the lower cover is connected and wrapped with the second sealing section; the upper cover comprises a top edge and a surrounding wall, the lower cover comprises a bottom edge and a surrounding wall, and the top edge forms an angle of 90-120 degrees with the inner angle of the surrounding wall and the bottom edge forms an angle with the inner angle of the surrounding wall; the top edge of the upper cover is welded with the positive pole; the bottom edge of the lower cover is welded with the other pole of the electrode. The sealing structure is convenient for welding the electrode with the upper cover and the lower cover in assembly and is stable in sealing; the liquid leakage phenomenon caused by poor sealing is prevented, and the multiplying power performance of the battery can be improved, the internal resistance is reduced, and the heat productivity is reduced compared with the traditional electrode non-welding structure after the electrode is welded with the upper cover and the lower cover.

Description

Sealing structure of button cell

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a sealing structure of a button battery.

Background

Along with the coming of the era of intelligent wearing, the small button battery is favored by various intelligent wearing products by virtue of the advantages of light weight, small volume and easy assembly. However, with the development of the function diversification of intelligent products, the requirements on the safety and the energy density of the products are higher and higher, wherein the safety is mainly reflected in the sealing performance of button cell products, and the leakage of electrolyte of the products caused by poor sealing is prevented. Therefore, a new sealing structure and a new sealing method are needed.

To solve this problem, the present invention is hereby proposed.

Disclosure of Invention

The utility model aims to provide a sealing structure of a button cell.

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

a sealing structure of a button cell comprises an upper cover, a lower cover, a supporting ring and a sealing ring; the button battery comprises a winding core, and the support ring is of an annular structure and surrounds the outer side of the winding core; the support ring is divided into a first sealing section, an insulating section and a second sealing section, the upper cover is connected with the first sealing section and is wrapped, and the lower cover is connected with the second sealing section and is wrapped.

Preferably, the upper cover comprises a top edge and a surrounding wall, the lower cover comprises a bottom edge and a surrounding wall, and the top edge forms an angle of 90-120 degrees with the inner angle of the surrounding wall and the bottom edge forms an angle with the inner angle of the surrounding wall.

Further, the top edge of the upper cover is welded with the positive pole; the bottom edge of the lower cover is welded with the other pole of the electrode.

Preferably, the upper cover and the lower cover are of the same structure, and the outer walls of the first sealing section and the second sealing section are compounded with sealing rings.

Further, the surrounding walls of the upper cover and the lower cover and the sealing ring are mechanically encapsulated.

Further, the surrounding wall, the first sealing section and the second sealing section form a sealing structure through mechanical extrusion.

Preferably, the button cell is a primary battery or a secondary battery or a capacitor, and the cell chemical system comprises lithium-MnO 2, lithium thionyl chloride, a lithium fluorocarbon primary battery or a lithium-graphite, lithium-sulfur and lithium-silicon secondary rechargeable battery.

The utility model has the beneficial technical effects that:

the sealing structure of the utility model is convenient for welding the electrode with the upper cover and the lower cover in the assembly process, and has stable sealing; the liquid leakage phenomenon caused by poor sealing is prevented, and the multiplying power performance of the battery can be improved, the internal resistance is reduced, and the heat productivity is reduced compared with the traditional electrode non-welding structure after the electrode is welded with the upper cover and the lower cover.

Drawings

Fig. 1 is a cross-sectional view of a sealing structure of a button cell.

In the figure: 1. an upper cover; 2. a positive post; 3. a support ring; 4. a seal ring; 5. a first seal section; 6. a third section of support ring; 7. a second seal section; 8. and (7) a lower cover.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

Example 1

As shown in fig. 1, a sealing structure of a button cell comprises an upper cover 1, a lower cover 8, a support ring 3 and a sealing ring 4, wherein the upper cover 1 comprises a top edge and a surrounding wall, the lower cover 8 comprises a bottom edge and a surrounding wall, an angle between the top edge and the surrounding wall is 90-120 degrees, an angle between the bottom edge and the surrounding wall is 90-120 degrees, the angle range is adjusted according to the sealing requirement, the button cell comprises a winding core, and the top edge of the upper cover 1 is welded with a positive post 2; the support ring 3 is of an annular structure, surrounds the outer side of the winding core and plays a role in supporting a framework; the support ring 3 is divided into a first sealing section 5, an insulating section 6 and a second sealing section 7; wherein, the upper cover 1 and the lower cover 8 have the same structure, and the outer walls of the first sealing section 5 and the second sealing section 7 are compounded with a sealing ring 4. During sealing, the upper cover 1 is connected and wrapped with the first sealing section 5, and the lower cover 8 is connected and wrapped with the second sealing section 7; the inner diameters of the upper cover 1 and the lower cover 8 are larger than the outer diameters of the first sealing section 5 and the second sealing section 7. The button cell can be a primary cell or a secondary cell or a capacitor, and the cell chemical system comprises a lithium-MnO 2, lithium thionyl chloride, lithium fluorocarbon and other primary cells, and also comprises lithium-graphite, lithium-sulfur, lithium silicon and other secondary rechargeable cells.

The upper cover 1, the lower cover 8 and the support ring 3 are separated, when electrode assembly is carried out, polar columns are conveniently welded with the upper cover 1 and the lower cover 8, the surrounding walls of the upper cover 1 and the lower cover 8 and the sealing ring 4 are mechanically encapsulated, and when the surrounding walls of the upper cover 1 and the top edge and the surrounding walls of the lower cover 8 and the bottom edge form a certain obtuse angle, the surrounding walls and the first sealing section 5 and the second sealing section 7 form a sealing structure through mechanical extrusion.

Welding the top edge of the upper cover 1 with a positive pole of an electrode pole, sleeving the support ring 3 on the outer side of the winding core, and connecting the first sealing section 5 of the support ring 3 with the surrounding wall of the upper cover 1 and carrying out mechanical sealing; welding the bottom edge of the lower cover 8 with the other pole of the electrode; injecting an electrolyte; the second sealing section 7 of the support ring is connected with the surrounding wall of the lower cover 8 and is sealed mechanically.

The principle of the utility model is that the upper cover and the lower cover are separated from the support ring, the welding of the pole column with the upper cover and the lower cover is convenient during the electrode assembly, the surrounding wall of the upper cover and the lower cover and the sealing ring are mechanically encapsulated, and when the surrounding wall of the upper cover and the top edge and the surrounding wall of the lower cover form a certain obtuse angle with the bottom edge, the surrounding wall, the first sealing section and the second sealing section form a sealing structure through mechanical extrusion.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art are covered in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A sealing structure of a button cell is characterized by comprising an upper cover (1), a lower cover (8), a support ring (3) and a sealing ring (4); the button cell comprises a winding core, and the support ring (3) is of an annular structure and surrounds the outer side of the winding core; the support ring (3) is divided into a first sealing section (5), an insulating section (6) and a second sealing section (7), the upper cover (1) is connected with the first sealing section (5) and is wrapped, and the lower cover (8) is connected with the second sealing section (7) and is wrapped.

2. Sealing structure for button cells according to claim 1, characterized in that the upper lid (1) comprises a top edge and a surrounding wall, and the lower lid (8) comprises a bottom edge and a surrounding wall, the top edge forming an angle of 90-120 degrees with the inner corner of the surrounding wall and the bottom edge forming an angle with the inner corner of the surrounding wall.

3. The seal structure of the button cell according to claim 1, wherein the top edge of the upper cover (1) is welded with the positive pole (2); the bottom edge of the lower cover (8) is welded with the other pole of the electrode.

4. The seal structure of the button cell according to claim 1, characterized in that the upper cover (1) and the lower cover (8) are of the same structure, and the outer walls of the first seal section (5) and the second seal section (7) are compounded with a seal ring (4).

5. Sealing structure of button cell according to claim 1, characterized in that the surrounding walls of the upper cover (1) and the lower cover (8) and the sealing ring (4) are mechanically encapsulated.

6. The seal structure of button cells according to claim 5, characterized in that the surrounding wall forms a seal structure with the first seal segment (5) and the second seal segment (7) by mechanical pressing.

7. The sealing structure of button cell according to claim 1, wherein the button cell is a primary or secondary battery or capacitor, and the cell chemistry system comprises lithium-MnO 2, lithium thionyl chloride, lithium fluorocarbon primary or lithium-graphite, lithium-sulfur, lithium silicon secondary rechargeable battery.