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This paper aims to explore the optimal charging frequency of the LiFePO4 battery by the analysis of the AC impedance. The experiments show that the optimal charging frequency is at the minimum AC impedance frequency fZmin. In such a condition, the LiFePO4 battery charging time and charging efficiency are improved about 5.6% and 6.8%, respectively. In addition, the increased temperature of the battery...
In this paper, a sinusoidal current charger (Sin-CC) with optimal frequency tracker is proposed for Li-ion battery. The proposed optimal frequency tracker is mainly constructed by the phase-lock-loop so that the features of detecting, tracking and locking in the optimal charging frequency can be achieved. The experimental results show that the charging speed charging efficiency and increasing surface...
This paper aims to explore the optimal Li-ion battery charging frequency by using AC impedance technique. The experiment proves that the optimal charging frequency is the point of the minimum AC impedance. In such a situation of the battery charged by the optimal charging frequency, the charging time and charging efficiency are improved above 30.68% and 30.6%.
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