Working principle of electric vehicle battery folding
The charging and discharging process of lead-acid battery is the process of electrochemical reaction. When charging, lead sulphate forms lead oxide, and lead oxide is reduced to lead sulfate when discharging. Lead sulfate is a very easy to crystallize material. When the concentration of lead sulfate in the electrolysis solution is too high, or the static idle time is too long, it will "hold". Small crystals, which attract the surrounding lead sulfate, form large inert crystals just like snowballs. The lead sulphate after crystallization can not only be reduced to lead oxide, but also precipitated on the electrode plate, resulting in a decrease in the working area of the electrode plate. This phenomenon is called vulcanization, which is often called aging. The battery capacity will gradually decrease until it can not be used.