Explosion-proof packaging structure, button cell and packaging method thereof

Abstract

The invention provides a button cell with a novel structure and a packaging method thereof, the button cell comprises an explosion-proof packaging structure, the explosion-proof packaging structure comprises a steel shell, a cap, a lower cover plate, a liquid injection cover plate, an explosion-proof sheet, a cylinder and a sealant; tabs and a roll core are arranged in the explosion-proof packaging structure; the tabs are respectively connected with the upper end and the lower end of the roll core; the tab at the upper end of the roll core is connected with the liquid injection cover plate, and the tab at the lower end of the roll core is connected with the lower cover plate. According to the button cell, aluminum plastic film gluing or plastic part heat sealing is adopted, the sealing is reliable, the yield is high, the reliability is good, the packaging deformation is small, the volume utilization rate is high, and the capacity and the specific energy density can be improved. The explosion-proof technology adopted by the invention is an explosion-proof sheet which is a stamping part, when the air pressure in the cell is too high, an etching groove of the explosion-proof sheet is invalid, the cell is not sealed any more, and the pressure is released, so that safety accidents such as explosion caused by pressure rise in the shell and the expansion of the shell can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of battery materials and battery preparation, and in particular relates to an explosion-proof packaging structure, a button battery and a packaging method thereof. Background technique [0002] The button batteries on all kinds of cheap electronic products that are common in daily life are mostly the traditional disposable (non-rechargeable) type, which are low in price and simple in processing technology. Today, in order to meet consumers' demands for high endurance, high safety and individualization of electronic products, major battery manufacturers have begun to gradually produce new rechargeable button batteries with higher energy density, various specifications, and various materials. Because of this, the processing difficulty and technology of the new button battery are also constantly upgrading, and the traditional processing technology has touched the pain point of upgrading the processing technol...

AI Technical Summary

Problems solved by technology

According to the needs of different circuit boards, the forms of soldering pins are often various. At the same time, the soldering pins of new button batteries are more complicated.

[0004] In addition, when the button battery is abnormally charged and discharged or the positive and negative terminals are short-circuited, the temperature inside the casing will rise sharply, and the gas generated by the battery body will cause the internal pressure of the casing to increase, the casing will expand, and eventually the button battery will explode and cause a safety accident.

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