Button cell

Abstract

The invention discloses a button cell, and belongs to the field of cell preparation. The button cell comprises a negative electrode cover and a positive electrode cover, wherein a sealing rubber ring is arranged at a buckle part of the negative electrode cover and the positive electrode cover so that a sealed space is formed between the negative electrode cover and the positive electrode cover, a negative electrode, a separator, a positive electrode and a current collector are arranged in the sealed space, an annular sealing cavity is arranged between a side wall of the positive electrode and an inner wall of the positive electrode cover, the sealing cavity is filled with an electrolyte, the button cell also comprises a support cover, the support cover comprises a main body, an annular cladding body and an annular support body, the main body is arranged between the current collector and the positive electrode cover, the annular cladding body is formed by axially and upwards extending an outer edge of the main body, the annular support body is formed by outwards extending an upper edge of the cladding body along a radial direction, and an outer edge of the support body props against the inner wall of the positive electrode cover. By arranging the support cover, the positive electrode, the current collector and the positive electrode cover can be effectively prevented from move relative to one another, the integral stability of the button cell is improved, the application quality of the button cell is ensured, liquid leakage is effectively prevented, and the service lifetime of the button cell is prolonged.

Description

technical field [0001] The invention relates to the field of battery production, in particular to a button battery. Background technique [0002] Because of its lightness and compactness, button batteries have been widely used in various miniature electronic products. Generally, the diameter ranges from 4.8mm to 30mm, and the thickness ranges from 1.0mm to 7.7mm. It is mainly used as a backup for various electronic products. Power supplies, such as computer motherboards, electronic watches, electronic dictionaries, electronic scales, memory cards, remote controls, electric toys, pacemakers, electronic hearing aids, counters, cameras, etc. With the acceleration of the development of electronic products, the requirements for button batteries are also increasing. [0003] Existing button batteries generally leave a space for filling the electrolyte between the positive electrode and the positive electrode cover. On the one hand, the relative displacement between the positive e...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a button battery, and solve the technical problem that the positive electrode, the current collector, and the positive electrode cover of the button battery in the prior art are prone to relative displacement and liquid leakage.

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