Lithium battery swell reason

1. The safety valve opening pressure is too high, or the safety valve is blocked. When the pressure in the body increases to a certain extent, the valve cannot open normally, and in this case, the bulge will be deformed.

2. The floating charge voltage is set too high, the charging current is large, causing the precipitation of O2 on the positive electrode plate to speed up, but it is too late to compound in the negative electrode, and the temperature inside the battery body rises very quickly. When the exhaust gas is not enough, the pressure reaches a certain level, so that VRLA The battery pack is deformed.

3. VRLA battery charging operation, especially in the series battery pack, if the battery pack is overcharged, if there are poor quality batteries, there will often be internal gas compounding and other phenomena, resulting in bulging.

4. Because VRLA battery is a poor liquid design, leaving a reserved way for the gas combination, and if there is a "rich liquid" phenomenon, it will block the O2 diffusion to the negative electrode, reduce the O2 recombination rate, increase the body pressure Big.

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