Button cell

Abstract

The invention discloses a button cell, which comprises a shell body, a pole, a sealing piece and a battery cell, wherein a through hole is formed in the shell body; the pole is arranged in the throughhole in a penetrating manner, the pole and the shell body are in sealed connection through an insulating piece, a liquid injection hole is formed in the shell body or the pole, and the liquid injection hole is communicated with the interior of the shell body; the sealing piece is used for sealing the liquid injection hole; and the battery cell is arranged in the shell body, a first tab and a second tab with opposite polarities are respectively arranged at two ends of the battery cell, the first tab is electrically connected with the shell body, and the second tab is electrically connected with the pole. The button cell is simple in structure, the shell body is small in occupied space and large in internal space, the energy density of a battery is effectively improved, and the production requirement is met.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a button battery. Background technique [0002] The battery shell of the button battery adopts a cylindrical structure. At present, the battery shell is generally divided into two structures. One structure is composed of an inner shell, an outer shell and a sealing ring. The outer shell is buckled on the outside of the inner shell, and the outer shell The sealing ring is connected with the inner casing, this structure occupies more space in the radial direction, resulting in the battery not being able to make full use of the internal space of the battery casing, and there is a problem of low energy density of the battery; another structure is It is composed of a shell and a top cover, and the top cover is connected with the shell. The existing top cover is generally connected with poles by riveting, and the structure is complex, and the structure thickness of this top c...

AI Technical Summary

Problems solved by technology

[0002] The battery shell of the button battery adopts a cylindrical structure. At present, the battery shell is generally divided into two structures. One structure is composed of an inner shell, an outer shell and a sealing ring. The outer shell is buckled on the outside of the inner shell, and the outer shell The sealing ring is connected with the inner casing, this structure occupies more space in the radial direction, resulting in the battery not being able to make full use of the internal space of the battery casing, and there is a problem of low energy density of the battery; another structure is It is composed of a shell and a top cover, and the top cover is connected with the shell. The existing top cover is generally connected with poles by riveting, and the structure is complex, and the structure thickness of this top cover is relatively large, resulting in more space in the axial direction. There is also the problem of low battery energy density

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