In order to prevent the battery from being overcharged, it is necessary to control the charging end point. When the battery is fully charged, there will be some special information that can be used to judge whether the charging end point is reached. There are generally the following six methods 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: judge the end point of charging by detecting the rate of change of the peak temperature of the battery;
3. T control: the difference between the temperature and the ambient temperature will reach the maximum when the battery is fully charged;
4. -V control: When the battery is fully charged and reaches a peak voltage, the voltage will drop to a certain value
5. Timing control: control the charging end point by setting a certain charging time, 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 high temperature battery) charging should be avoided, so charging should be stopped when the battery temperature rises to 60 OC.
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