(1) The positive electrode -- the active substance is lithium manganese oxide or lithium cobalt oxide, lithium nickel cobalt manganese oxide material, electric bicycles are commonly used lithium nickel cobalt manganese oxide (commonly known as three yuan) or three yuan + a small amount of lithium manganese oxide, pure lithium manganese oxide and lithium iron phosphate due to large volume, poor performance or high cost and gradually fade out. The conductive fluid uses electrolytic aluminum foil with a thickness of 10 to 20 microns.

(2) Diaphragm -- a specially shaped polymer film with a microporous structure that allows lithium ions to pass through, but electrons cannot.

(3) Negative electrode -- the active substance is graphite, or carbon with approximately graphite structure. The conductive collector fluid uses electrolytic copper foil with a thickness of 7-15 microns.

(4) Organic electrolyte -- carbonate solvent dissolved with lithium hexafluorophosphate, polymer using gel electrolyte.

(5) battery shell -- divided into steel shell (square type rarely used), aluminum shell, nickel-plated iron shell (cylindrical battery use), aluminum plastic film (flexible packaging), and battery cap, is also the positive and negative terminal of the battery.