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

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.

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

• Journal Article Type: Article
• Acceptance Date: Jul 3, 2018
• Online Publication Date: Jul 6, 2018
• Publication Date: Oct 10, 2018
• Deposit Date: Jul 17, 2018
• Publicly Available Date: Jul 7, 2019
• Journal: Journal of cleaner production
• Print ISSN: 0959-6526
• Electronic ISSN: 1879-1786
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 198
• Pages: 1090-1104
• 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
• Public URL: http://hdl.handle.net/10059/2997
• Contract Date: Jul 17, 2018