Corrosion of Aluminum Casing of Lithium-ion Power Battery

Electrical property test, the SEM, ICP, XRD and EDS were used to study the lithium-ion power batteries; including decomposed and normal batteries with corroded aluminum casing, and the corrosion conditions were discussed. It was found that the cycle life, storage and discharge rate of corrosion batteries had a rapid declining. When the anode tab was contacted with the aluminum inner wall of aluminum lithium-ion battery, corrosion reaction might occur after more than six months of placement or using, the corrosion reaction occurd in the aluminum inner wall first, and then gradually developed into the outer aluminum. The main corrosion products were Li2CO3 and aluminum salts.