In order to prevent the battery from overcharging, it is necessary to control the charging end point. When the battery is full, some special information can be used to judge whether the charging reaches the end point. There are generally six ways to prevent the battery from being overcharged:

1. Peak voltage control: Determine the end point of charging by detecting the peak voltage of the battery;

2. dT/dt control: Determine the end point of charging by detecting the peak temperature change rate of the battery;

3. T control: When the battery is fully charged, the difference between temperature and ambient temperature will reach the maximum;

4. -V control: When the battery is fully charged to reach a peak voltage, the voltage will drop to a certain value.

5, timing control: By setting a certain charging time to control the charging end point, generally set the time required to charge 130% of the nominal capacity to control;

6. TCO Control: Considering the safety and characteristics of the battery, high temperature (except for high temperature batteries) should be avoided, so charging should be stopped when the battery temperature rises to 60 OC.