The reason for the high voltage of the accumulator may be the overcharge of the battery or the damage of the voltage regulator. There are two specific situations:
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1, the charging of the car battery is divided into main charge and floating charge, the general lead-acid battery is intended to be charged for the first time, and it is changed to floating charge after reaching the rated voltage. When the floating charge makes the battery voltage rise to about 115% of the rated value, the charging device should be turned off to stop charging. If the battery voltage is too high when the battery is first installed, it may be overshoot.
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2, if the overvoltage is more than 15% after the battery is loaded into the car, it may be the generator voltage regulator is damaged, resulting in continued charging after the charging voltage exceeds the specified value, and eventually there will be overvoltage phenomenon.