There are usually two types of exteriors for lithium batteries: cylindrical and rectangular.
The inside of the battery adopts a spiral wound structure, and is formed by spacing a positive and negative electrode with a very fine and highly permeable polyethylene film insulation material. The positive electrode includes a lithium ion collector composed of lithium and cobalt dioxide and a current collector composed of an aluminum film. The negative electrode is composed of a lithium ion collector composed of a sheet-like carbon material and a current collector composed of a copper film. The battery is filled with an organic electrolyte solution. Safety valves and PTC components are also included to protect the battery from damage during abnormal conditions and output short circuits.
The external and internal structure of the lithium battery
The voltage of a single lithium battery is 3.6V, and the capacity cannot be infinite. Therefore, the single lithium battery is often processed in series or in parallel to meet the requirements of different occasions.
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