JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Print ISSN : 0021-9592
Process Systems Engineering and Safety
On-Line Monitoring of Capacity Fade in Lithium-Ion Batteries
Sungwoo ChoHyeonseok JeongChonghun HanShanshan JinJae Hwan LimJeonkeun Oh
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2012 Volume 45 Issue 12 Pages 983-994

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Abstract

Estimation algorithms to measure the actual performance of a lithium-ion battery are presented for real-time online monitoring. Capacity was selected as the representative variable indicating the performance of the battery. Three algorithms were suggested to estimate the degree of capacity fading: principal algorithm, supplementary algorithm, and hybridized algorithm. The principal algorithm was based on a simplified equivalent circuit model and a soft sensor technique. The soft sensor technique was based on a system identification methodology with moving horizon estimation. The supplementary algorithm was developed to compensate for the problem of computational load. Finally, both the algorithms were combined to develop a complementary hybridized algorithm. The suitability of the algorithms was demonstrated with real-time online monitoring of fresh and aged cells using cyclic experiments.

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© 2012 The Society of Chemical Engineers, Japan
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