Fuzzy-controlled Li-ion battery charge system with activestate-of-charge controller
Guan-Chyun Hsieh; Liang-Rui Chen; Kuo-Shun Huang
Industrial Electronics, IEEE Transactions on
Volume 48, Issue 3, Jun 2001 Page(s):585 - 593
Digital Object Identifier   10.1109/41.925585
Summary:A fuzzy-controlled active state-of-charge controller (FC-ASCC) for improving the charging behavior of a lithium-ion (Li-ion) battery is proposed. The proposed FC-ASCC is designed to replace the general constant-voltage charging mode by two kinds of modes: sense and charge. A fuzzy-controlled algorithm is built with the predicted charger performance to program the charging trajectory faster and to keep the charge operation in a proposed safe-charge area (SCA). A modeling work is conducted for analyzing and describing the Li-ion battery in charging process. A three-dimensional Y-mesh diagram for describing the charging trajectories of the proposed FC charger is simulated. A prototype of a Li-ion battery charger with FC-ASCC is simulated and realized to assess the predicted charging performance. Experiment shows that the charging speed of the proposed FC charger compared with the general one increases about 23% and the charger can safely work in the SCA

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