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Open circuit voltage and state of charge relationship functional optimization for the working state monitoring of the aerial lithium-ion battery pack.

Wang, Shun-Li; Fernandez, Carlos; Zou, Chuan-Yun; Yu, Chun-Mei; Li, Xiao-Xia; Pei, Shi-Jie; Xie, Wei

Authors

Shun-Li Wang

Carlos Fernandez

Chuan-Yun Zou

Chun-Mei Yu

Xiao-Xia Li

Shi-Jie Pei

Wei Xie



Abstract

The aerial lithium-ion battery pack works differently from the usual battery packs, the working characteristic of which is intermittent supplement charge and instantaneous large current discharge. An adaptive state of charge estimation method combined with the output voltage tracking strategy is proposed by using the reduced particle - unscented Kalman filter, which is based on the reaction mechanism and experimental characteristic analysis. The improved splice equivalent circuit model is constructed together with its state-space description, in which the operating characteristics can be obtained. The relationship function between the open circuit voltage and the state of charge is analyzed and especially optimized. The feasibility and accuracy characteristics are tested by using the aerial lithium-ion battery pack experimental samples with seven series-connected battery cells. Experimental results show that the state of charge estimation error is less than 2.00%. The proposed method achieves the state of charge estimation accurately for the aerial lithium-ion battery pack, which provides a core avenue for its high-power supply security.

Journal Article Type Article
Publication Date Oct 10, 2018
Journal Journal of cleaner production
Print ISSN 0959-6526
Electronic ISSN 1879-1786
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 198
Pages 1090-1104
Institution Citation WANG, S.-L., FERNANDEZ, C., ZOU, C.-Y., YU, C.-M., LI, X.-X., PEI, S.-J. and XIE, W. 2018. Open circuit voltage and state of charge relationship functional optimization for the working state monitoring of the aerial lithium-ion battery pack. Journal of cleaner production [online], 198, pages 1090-1104. Available from: https://doi.org/10.1016/j.jclepro.2018.07.030
DOI https://doi.org/10.1016/j.jclepro.2018.07.030
Keywords Lithiumion battery pack; Open circuit voltage; Working state monitoring; State of charge estimation; Unscented Kalman filter
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