HIGH CAPACITY LITHIUM ION SECONDARY BATTERY WITH METAL CASE

摘要

The present invention relates to a high capacity lithium ion secondary battery with metal casing, characterized in that each of the positive terminal or negative terminal includes respectively an upper backing plate, an upper insulator and a lower insulator. The upper backing plate and upper insulator are long-circular piece, two or more rivets pass through the concentric holes on the upper arm of a positive or negative electrode tab, the lower insulator, a sealing cover, the upper insulator and the upper backing plate respectively and rivet them as a whole. The lower arm of the positive electrode tab or negative electrode tab is connected to the corresponding positive or negative electrode tab on a battery core body, and the battery core body is comprised of two or more winded cores in parallel connection. The battery is provided with the advantages and effects of good sealing performance, good electrochemistry property, and simple manufacturing process, as well as high security of a pile comprised of plurality of such individual batteries. As a result the useless space in height of battery is reduced and the volumetric specific energy of the same is enhanced.