A large-capacity single battery

Abstract

A high-capacity unit cell comprises a plurality of small-capacity cylindrical unit cells, the like poles of the plurality of small-capacity cylindrical unit cells are combined in parallel through metal connecting pieces to form the high-capacity unit cell, two ends of each of the positive and negative electrodes are respectively fixed by a plastic jig, heat conduction sheets are arranged in the gaps of the high-capacity unit cell, two side surfaces of each of the heat conduction sheets respectively contact with the shell surfaces of the small-capacity cylindrical unit cells at two sides of the heat conduction sheets, and one end of each of the heat conduction sheets is exposed to the contour of the high-capacity unit cell. The high-capacity unit cell has the advantages of substantially decreased failure rate, increased reliability, substantially increased safety, and effectively prolonged service life.

Description

technical field

[0001] The present invention relates to a large-capacity single battery. Background technique

[0002] Lithium batteries have the advantages of high specific capacity, high specific power, long cycle life, and no pollution, and have been used more and more. From small to mobile phones, children's toys, large to portable power tools, electric bicycles, electric motorcycles, and even electric vehicles.

[0003] But such batteries use organic electrolytes, which conduct electricity much less than aqueous solutions. In order to improve its current output capability, the designed plate area is very large, the thickness is extremely thin, and the active material loading is extremely low. A battery with a small capacity has a large plate area and is difficult to manufacture, and a battery with a large capacity is even more difficult to manufacture. And the larger the electrode area, the easier it is to bring in processing defects and imbalances. The probability ...

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