Positive and negative pole composition of lithium battery
Feb 10,2023
Lithium batteries usually have two types of appearance: cylindrical and square. The inside of the battery is spiral wound structure, which is made of a very fine and highly permeable polyethylene film isolation material between the positive and negative electrodes. The positive electrode includes a current collector composed of lithium cobaltate (or nickel cobalt lithium manganate, lithium manganate, lithium ferrous phosphate, etc.) and aluminum foil. The negative electrode is composed of a current collector composed of graphitized carbon material and copper foil. The battery is filled with organic electrolyte solution. In addition, there are safety valves and PTC elements (some cylindrical elements are used) to protect the battery from damage in case of abnormal state and output short circuit. The voltage of a single lithium battery is 3.7V (3.2V for lithium ferrous phosphate anode), and the battery capacity cannot be unlimited. Therefore, a single lithium battery is often processed in series and parallel to meet the requirements of different occasions.
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