Effect of charge rate on capacity degradation of LiFePO 4 power battery at low temperature

International Journal of Energy ResearchVolume 44, Issue 3 p. 1775-1788 RESEARCH ARTICLE Effect of charge rate on capacity degradation of LiFePO4 power battery at low temperature Xiaogang Wu, Xiaogang Wu School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, China State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, ChinaSearch for more papers by this authorWenbo Wang, Wenbo Wang orcid.org/0000-0001-8171-3616 School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, China State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, ChinaSearch for more papers by this authorJiuyu Du, Corresponding Author Jiuyu Du dujiuyu@tsinghua.edu.cn State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China Correspondence Jiuyu Du, State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China. Email: dujiuyu@tsinghua.edu.cnSearch for more papers by this author Xiaogang Wu, Xiaogang Wu School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, China State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, ChinaSearch for more papers by this authorWenbo Wang, Wenbo Wang orcid.org/0000-0001-8171-3616 School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, China State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, ChinaSearch for more papers by this authorJiuyu Du, Corresponding Author Jiuyu Du dujiuyu@tsinghua.edu.cn State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China Correspondence Jiuyu Du, State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China. Email: dujiuyu@tsinghua.edu.cnSearch for more papers by this author First published: 30 December 2019 https://doi.org/10.1002/er.5022Citations: 16Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Summary Limited by the current power battery technology, electric vehicles show extremely poor duration performance and potential risk at low temperature, which is mainly caused by poor charging performance of lithium-ion batteries. To explore the impact of charging process on cycle degradation at low temperatures, a cycle aging experimental scheme with different charging C-rate (0.3C and 0.5C) under −10°C and −20°C was designed for the commercial LiFePO4 battery. The experimental batteries showed severe degradation after a few of cycles. The phenomenon of reduced internal resistance and up-shift of the charging curve was found during the early cycle stages (0th-20th cycle). The influence of low-temperature cycle on battery was analyzed by the increment capacity analysis (ICA); the fast decreasing intensity of ①*II showed sharp loss of lithium ions. Those lithium ions mainly transformed into lithium plating and built up dendrites instead of reintercalating into the anode crystal structure, causing the further degradation of capacity and ohmic resistance. Degradation law was obtained by curve regression analysis in the end. Citing Literature Volume44, Issue310 March 2020Pages 1775-1788 RelatedInformation