What is the cause of the drum kit

Battery safety valve opening pressure is too high, or the safety valve blocking. When the pressure of the body increases to a certain extent, the valve can not be opened normally, in this case, it is bound to cause drum package deformation. Floating voltage is too high, the charging current, resulting in positive plate precipitation of O2 accelerated, and not in the anode composite, and the battery body temperature rises quickly, the exhaust time, pressure reaches a certain value, the bulge deformation of Panasonic battery. Sealed battery charging operation, especially in the series battery pack, if the battery pack has been charged, if there is a poor quality of the battery often appear internal gas complex phenomenon, resulting in the phenomenon of drum package. Because the sealed battery belongs to lean liquid to gas compound design, set aside to avoid, and if there is a rich fluid phenomenon, will produce the negative O2 diffusion barrier, reduce the recombination rate of O2, the body pressure increases.