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Influence of equalization on LiFePO4 battery inconsistency
Lv, Jie1; Song, Wenji1; Lin, Shili1; Chen, Mingbiao1; Feng, Ziping1; Li, Yongliang2; Ding, Yulong2
2017-06-25
Source PublicationINTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume41Issue:8Pages:1171-1181
AbstractCapacity inconsistency among cells is a serious problem in battery energy storage systems. The inconsistency reduces battery pack lifetimes and increases their usage costs. Active balancing is an effective technique for performance equalization between cells. Here, a quantitative analysis method based on an active balancing circuit is developed to explain how battery capacity inconsistency is affected by balancing parameters. Four balancing parameters, namely, charge/discharge current rate, initial capacity difference before balancing, balancing current, and balancing time, have been considered to explain the effects on battery capacity consistency. The results indicate that (1) the inconsistency of batteries can be reduced more effectively for discharging with active balancing at small current rates; (2) for an improved balancing effect, it is necessary to maintain a high ratio () of balancing current to charging/discharging current during the balancing process; thus, a larger balancing current is significant; (3) the value of capacity difference reduction ratio () grows more dramatically in discharging at large initial battery capacity differences; and (4) when the balancing current only marginally changes, following the increase of current rate, the ratio () of balancing time to charging duration decreases and the balancing effect becomes inconspicuous in charging, while increases and the balancing effect reduces in discharging. These influence regulations can help us make and optimize balancing control strategies for LiFePO4 batteries. Copyright (c) 2017 John Wiley & Sons, Ltd.
SubtypeArticle
KeywordBattery Management Systems Active Balancing Battery Capacity Inconsistency Balancing Parameters
WOS HeadingsScience & Technology ; Technology
DOI10.1002/er.3701
WOS Subject ExtendedEnergy & Fuels ; Nuclear Science & Technology
WOS KeywordLITHIUM-ION BATTERIES ; ELECTRIC VEHICLES ; SOC ESTIMATION ; CELL ; MANAGEMENT ; SYSTEM ; MODEL ; STATE ; CONVERTER ; PERFORMANCE
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(51477171) ; Science and Technology Project of Guangdong Province(2014B010128001 ; Guangzhou Science and Technology Project(201509010018) ; Key Laboratory Foundation of Renewable Energy, Chinese Academy of Sciences(Y607j31001) ; 2015B050501008)
WOS SubjectEnergy & Fuels ; Nuclear Science & Technology
WOS IDWOS:000403300500008
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14142
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lv, Jie,Song, Wenji,Lin, Shili,et al. Influence of equalization on LiFePO4 battery inconsistency[J]. INTERNATIONAL JOURNAL OF ENERGY RESEARCH,2017,41(8):1171-1181.
APA Lv, Jie.,Song, Wenji.,Lin, Shili.,Chen, Mingbiao.,Feng, Ziping.,...&Ding, Yulong.(2017).Influence of equalization on LiFePO4 battery inconsistency.INTERNATIONAL JOURNAL OF ENERGY RESEARCH,41(8),1171-1181.
MLA Lv, Jie,et al."Influence of equalization on LiFePO4 battery inconsistency".INTERNATIONAL JOURNAL OF ENERGY RESEARCH 41.8(2017):1171-1181.
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