Safety valve: the opening pressure of the safety valve is too high, or the safety valve is blocked. When the internal pressure increases to a certain extent, the valve cannot be opened normally, which is bound to cause bulge deformation.

Float charging voltage: the float charging voltage is set too high and the charging current is large, which leads to the rapid precipitation of O2 on the positive plate without time for recombination at the negative pole. At the same time, the temperature in the battery body rises quickly. The lithium ion battery pack will appear bulge deformation when the exhaust gas is not enough and the pressure reaches the specified time.

Overcharge: If the lithium-ion battery pack is overcharged, poor quality batteries will often have poor internal gas recombination and other phenomena, resulting in bulge.

How to deal with the bulge of lithium-ion battery pack?

It is better to give up the use of the bulging lithium-ion battery pack. After all, the battery capacity has been affected, and the internal route of the battery has also had problems. If you continue to use it, there may be a great danger. Bulging lithium-ion battery packs that are not intended to be used should be discarded in the relevant classified recycling bins. Do not leave them in the wild at will to prevent danger.