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Fuzzy Controlled Individual Cell Equalizers for Lithium-Ion Batteries
Yuang-Shung LEE Ming-Wang CHENG Shun-Ching YANG
IEICE TRANSACTIONS on Communications
Publication Date: 2008/07/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Energy in Electronics Communications
fuzzy logic control, bi-directional Cuk converter, discontinuous capacitor voltage mode, battery equalization, lithium-ion battery,
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A fuzzy logic control battery equalizing controller (FLC-BEC) is adopted to control the cell voltage balancing process for a series connected Li-ion battery string. The proposed individual cell equalizer (ICE) is based on the bidirectional Cuk converter operated in the discontinuous capacitor voltage mode (DCVM) to reduce the switching loss and improve equalization efficiency. The ICE with the proposed FLC-BEC can reduce the equalizing time, maintain safe operations during the charge/discharge state and increase the battery string capacity.