A novel model of the initial state of charge estimation for LiFePO4 batteries

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	A novel model of the initial state of charge estimation for LiFePO4 batteries
	Zhang, Yanhui 1,2; Song, Wenji1 ; Lin, Shili 1; Feng, Ziping1
刊名	journal of power sources
	2014-02-15
卷号	248 页码:1028-1033
关键词	Battery Energy efficiency State of charge Hybrid power generation system
英文摘要	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.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	electrochemistry ; energy & fuels
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记录号	WOS:000330551000129
内容类型	期刊论文
源URL	[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
推荐引用方式 GB/T 7714	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.