Why does the lithium battery appear to be bulging and deformed?

by:CTECHi     2021-07-19

1. The opening pressure of the safety valve is too high, or the safety valve is blocked. When the internal pressure increases to a certain level, the valve cannot be opened normally, in this case it is bound to cause bulging deformation.

2. The float charging voltage is set too high and the charging current is large, which causes the precipitation of O2 on the positive plate to accelerate, and it is too late to recombine in the negative electrode. At the same time, the temperature in the battery rises quickly, and the exhaust gas is not enough. When the pressure reaches a certain level, the VRLA battery will be bulged and deformed.

3, VRLA battery charging operation, especially in series battery pack, if the battery pack is overcharged, if there is a bad quality battery, the internal gas recombination phenomenon will often occur, resulting in bulging.

4. Because the VRLA battery is a lean-liquid design, there are reserved ways for the combination of gases, and if there is a 'rich liquid' phenomenon, it will prevent the generated O2 from diffusing to the negative electrode and reduce O2 The recombination rate increases the pressure in the body.

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