Button type battery

Abstract

The invention discloses a button type battery, and belongs to the preparation field of a battery. The button type battery comprises a negative electrode cover and a positive electrode cover, wherein a sealing adhesive ring is arranged in the buckling position of the negative electrode cover and the positive electrode cover to form a sealed space between the negative electrode cover and the positive electrode cover; a negative electrode, a diaphragm, a positive electrode and a current collector are arranged in the sealed space; an annular sealed cavity is formed between the side wall of the positive electrode and the inner wall of the positive electrode cover; the sealed cavity is filled with an electrolyte; the button type battery also comprises a supporting cover; the supporting cover comprises a main body which is arranged between the current collector and the positive electrode cover, an annular coating body which is formed by axial upward extension from the outer edge of the main body, and an annular supporting body which is formed by radial outward extension from the upper edge of the coating body; and the outer edge of the supporting body props against the inner wall of the positive electrode cover. By setting the supporting cover, relative displacement among the positive electrode, the current collector and the positive electrode cover can be effectively prevented; and therefore, the overall stability of the button type battery can be improved, the use quality can be ensured, electrolyte leakage can be effectively prevented, and the service life can be 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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