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A novel model of the initial state of charge estimation for LiFePO4 batteries
Zhang, Yanhui1,2; Song, Wenji1; Lin, Shili1; Feng, Ziping1
2014-02-15
发表期刊JOURNAL OF POWER SOURCES
卷号248页码:1028-1033
摘要The State-of-Charge (SOC) is an important performance parameter and evaluation index in rechargeable battery energy storage systems. Here, a novel smart estimation method based on coulomb counting is proposed in order to enhance estimation accuracy. Firstly, an enhanced model for the initial SOC (SOC0) estimation based on dynamic multi-parameter method is investigated, because SOC0 plays a key role in calculating real SOC in-time. All the design limits, such as voltage, temperature, are used as its constraints. And more importantly, the relaxation effect also is considered. The SOC0 with the main parameters satisfies Gauss function. Secondly, the quantitative relations of the energy efficiencies are measured and analyzed under the moderate discharging situation. The results show a negative quadratic correlation between energy efficiency and rate, and exhibit a reduction in energy efficiency as rate increases. Lastly, a test with several consecutive hybrid pulse power characteristic test profiles is carried. The experimental results indicate that the correction of SOC0 can efficiently limit the error below 4%, and also exhibit that considering on the effect of energy efficiency can further reduce its estimation error. (C) 2013 Elsevier B.V. All rights reserved.
文章类型Article
关键词Battery Energy Efficiency State Of Charge Hybrid Power Generation System
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.jpowsour.2013.09.135
研究领域[WOS]Electrochemistry ; Energy & Fuels
关键词[WOS]LITHIUM-ION BATTERIES ; ELECTRIC VEHICLES ; OF-CHARGE ; MANAGEMENT
收录类别SCI
语种英语
WOS类目Electrochemistry ; Energy & Fuels
WOS记录号WOS:000330551000129
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10676
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
2.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
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Zhang, Yanhui,Song, Wenji,Lin, Shili,et al. A novel model of the initial state of charge estimation for LiFePO4 batteries[J]. JOURNAL OF POWER SOURCES,2014,248:1028-1033.
APA Zhang, Yanhui,Song, Wenji,Lin, Shili,&Feng, Ziping.(2014).A novel model of the initial state of charge estimation for LiFePO4 batteries.JOURNAL OF POWER SOURCES,248,1028-1033.
MLA Zhang, Yanhui,et al."A novel model of the initial state of charge estimation for LiFePO4 batteries".JOURNAL OF POWER SOURCES 248(2014):1028-1033.
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