An advanced fast charging strategy for lithium polymer batteries

In this paper, an advanced fast-charging strategy for lithium polymer (Li-Po) battery is proposed, in which a two-stage charging current profile is employed. First, the constant charging current is used and when the battery voltage reaches a specified value, the charging current is reduced according to the root square of time. With this strategy, the charging time is shortened and the discharging energy is increased. The experimental results show that it is capable of charging the battery up to 84% capacity in 28 minutes compared with the constant current and constant voltage charging and pulse current charging methods.