The reasons for plate sulfation are as follows:

1) The initial charging of the battery is insufficient or the initial charging interruption time is long;

2) The battery is insufficiently charged for a long time;

3) Failure to charge in time after discharge;

4) Frequent overcharging or low current deep discharge;

5) If the density of the electrolyte is too high or the temperature is too high, lead sulfate will form deeply and be difficult to recover;

6) The battery has been stored for a long time, and it has not been used for a long time without regular charging;

7) The electrolyte is impure and self-discharge is large;

8) Internal short-circuit local effect or excessive water on the battery surface causes electric leakage;

9) Long-term overcharging seriously dehydrates the battery and the internal electrolyte level is low, which causes the exposed part of the plate to be sulfated.