Check storage battery shape is intact. Check if the battery case is protruding, leaking, breaking, battery terminal corrosion, etc. If there is such a phenomenon, the battery has been necrotic;
The first type is a carbon negative electrode material: the negative electrode materials currently used in lithium ion batteries are basically carbon materials
Everyone may have seen or heard the expansion of the battery drum, and even news events due to explosions caused by polymer lithium battery drums exist.