Abstract
In this paper, an Adaptive Pulse Charge System (APCS) for Li-ion batteries is proposed to improve the charge performance by pulse charging with most suitable frequency and duty. To evaluate the performance of proposed method, a prototype is designed and implemented with a 600 mAh Li-ion battery. Compared with standard Constant Current — Constant Voltage(CC-CV) method, proposed APCS has improved the charge speed by 13.7 %, while charge efficiency has improved by 3.1 %. With comparison to Variable Duty Pulse Charge (VDPC) system of 500 Hz and 1100 Hz, the proposed system has improved the charging speed by 3.8 %, 8.8 % and charge efficiency by 2 % and 2.3 % respectively. The results show that the APCS can adaptively provide the most suitable pulse based on the state of the battery for best charging speed and charge efficiency.
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