
Battery bulging is caused by overcharging, blocked battery vents, casing rupture, and other reasons. The specific causes are explained below: Long-term overcharging: Leads to grid fracture or deformation of battery plates or expansion of active materials, resulting in bulging. Blocked battery vents: Combined with overcharging, gas inside the battery cannot escape, leading to increased internal pressure. This situation is extremely dangerous and may even cause an explosion. Battery casing rupture: Air enters the battery interior, and the moisture in the air reacts and decomposes into oxygen and hydrogen, causing the battery to bulge. Using an incompatible charger: Using a charger that does not match the battery, with mismatched voltage and current, can lead to overcharging and bulging of the battery.


