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Performance of LiFePO4 batteries in parallel based on connection topology
Lv, Jie1,2,3,4; Lin, Shili1,2,3,4; Song, Wenji1,2,3; Chen, Mingbiao1,2,3,4; Feng, Ziping1,2,3; Li, Yongliang5; Ding, Yulong5
2019-10-15
发表期刊APPLIED ENERGY
ISSN0306-2619
卷号252页码:10
通讯作者Song, Wenji(songwj@ms.giec.ac.cn)
摘要Connection topology directly affects the performance of a battery pack, which must satisfy the demand of all-weather environments and the complex operating conditions of electric vehicles. Currently, studies focus on battery state estimation and inconsistency reduction to obtain high energy efficiency and long lifetimes, while lacking a comprehensive analysis of the battery inconsistency generation mechanism. Here, a method based on the battery posts position and connector resistance is developed to explain how connection topology affects the performance of LiFePO4/graphite batteries in parallel by experiments and theoretical analysis. Quantitative analyses of the interactions between current distribution and battery internal resistance, battery internal resistance and connector resistance, as well as load current rate and battery self-equalization, are discussed. The results indicate that the asynchronous change of individual cell voltage causes the voltage fluctuation of the battery module. The battery module has a larger available capacity at small current rates than at large ones. However, over-charge and over-discharge of individual cells are more likely to occur. Therefore, the cut-off conditions should be adjusted according to load current rates. Research on battery connection topology can directly contribute to better performance of the battery module, and improve the efficiency, reliability and economy of electric vehicles.
关键词Connection topology Parallel battery module Current distribution Battery internal resistance Battery self-equalization
DOI10.1016/j.apenergy.2019.113407
关键词[WOS]LITHIUM-ION BATTERIES ; MANAGEMENT-SYSTEM ; POWER MANAGEMENT ; CHARGE ; EQUALIZATION ; STATE ; RESISTANCE ; ENERGY ; MODEL ; CELL
收录类别SCI
语种英语
资助项目National Key Research and Development Program of China[2016YFB0901405] ; Natural Science Foundation of Guangdong Province[2018A030310077] ; National Natural Science Foundation of China[51806223]
WOS研究方向Energy & Fuels ; Engineering
项目资助者National Key Research and Development Program of China ; Natural Science Foundation of Guangdong Province ; National Natural Science Foundation of China
WOS类目Energy & Fuels ; Engineering, Chemical
WOS记录号WOS:000497968000012
出版者ELSEVIER SCI LTD
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/25988
专题中国科学院广州能源研究所
通讯作者Song, Wenji
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China
4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
5.Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England
第一作者单位中国科学院广州能源研究所
推荐引用方式
GB/T 7714
Lv, Jie,Lin, Shili,Song, Wenji,et al. Performance of LiFePO4 batteries in parallel based on connection topology[J]. APPLIED ENERGY,2019,252:10.
APA Lv, Jie.,Lin, Shili.,Song, Wenji.,Chen, Mingbiao.,Feng, Ziping.,...&Ding, Yulong.(2019).Performance of LiFePO4 batteries in parallel based on connection topology.APPLIED ENERGY,252,10.
MLA Lv, Jie,et al."Performance of LiFePO4 batteries in parallel based on connection topology".APPLIED ENERGY 252(2019):10.
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