Components Of Lithium-ion Batteries

Steel shell/aluminum shell/cylindrical/soft packaging series:
1. Positive electrode—the active material is generally lithium manganese oxide or lithium cobalt oxide, nickel-cobalt lithium manganate material, electric bicycles generally use nickel-cobalt lithium manganate (commonly known as ternary) or ternary + a small amount of lithium manganate, pure Lithium manganese oxide and lithium iron phosphate are gradually fading out due to their large size, poor performance or high cost. Electrolytic aluminum foil with a thickness of 10-20 microns is used for the conductive current collector.
2. Diaphragm - a specially shaped polymer film with a microporous structure that allows lithium ions to pass through freely, but electrons cannot pass through.
3. Negative electrode—the active material is graphite, or carbon with a similar graphite structure, and the conductive current collector uses electrolytic copper foil with a thickness of 7-15 microns.
4. Organic electrolyte—a carbonate-based solvent in which lithium hexafluorophosphate is dissolved, and a gel-like electrolyte for polymers.
5. Battery casing - divided into steel casing (square type is rarely used), aluminum casing, nickel-plated iron casing (used for cylindrical batteries), aluminum-plastic film (soft packaging), etc., as well as the battery cap, which is also the positive and negative of the battery pole terminal.