Fundamental Characteristics of Stationary Lithium-Ion Secondary Cells and a Cell-Voltage-Equalizing Circuit

Toshio MATSUSHIMA  Shinya TAKAGI  Seiichi MUROYAMA  Toshio HORIE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.8   pp.3436-3442
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.8.3436
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Energy in Electronics Communications
Keyword: 
lithium-ion cell,  discharge,  change cell-voltage-equalizing circuit,  assembled cell,  

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Summary: 
This paper describes the characteristics of lithium-ion cells developed for stationary use, as in the case of stand-by sources in power systems. The effect of a cell-voltage-equalizing circuit developed for batteries of cells is also demonstrated. The tested lithium-ion cells were suitable to be charged by the constant-current, constant-voltage (CCCV) method and could be charged efficiently over a wide range of temperatures. They also showed good discharge performance with little dependence on the discharge current and temperature. Total capacity reduction of over 60% can be expected in batteries of lithium-ion cells. The cell-voltage-equalizing circuit was shown to be useful and necessary for batteries of lithium-ion cells in order to suppress deviations in the cell voltage and capacity loss.