Fuzzy-controlled Li-ion battery charge system with activestate-of-charge controller
Guan-Chyun Hsieh
Liang-Rui Chen
Kuo-Shun Huang
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Jun 2001
Volume: 48,
Issue: 3
On page(s): 585-593
ISSN: 0278-0046
References Cited: 17
CODEN: ITIED6
INSPEC Accession Number: 6951732
Digital Object Identifier: 10.1109/41.925585
Current Version Published: 2002-08-07
Abstract
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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