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Multiparameters Model of the Initial SOC Considering the Relaxation Effect
Zhang, Yanhui1,2; Song, Wenji1; Lin, Shili1; Feng, Ziping1
2014-04-01
Source PublicationACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume2Issue:4Pages:599-605
AbstractTo improve the accuracy of the initial state-of-charge (SOCo) estimation, an enhanced SOC0 model-based ampere-hour (Ah) model of a LiFePO4 battery is presented for application in a battery energy storage system. It varies as a function of the open circuit voltage (OCV), rates, and relaxation effect. Here, the Thevenin equivalent circuit model is selected to model the LiFePO4 battery, and its mathematic equations are deduced to determine the inherent trade-off between the time constant and main parameter of the battery, which can address the dilemma of the conventional SOC0 method (OCV model) as the relaxation effect and how long the battery takes to reach a steady state. To illustrate advantages of the enhanced estimation model, a comparison analysis is performed on the enhanced model with the former model under the dynamic stress test. Furthermore, the experimental results indicate that the correction of SOC0 can significantly decrease the estimation error. The enhanced SOC0 model is expected to help determine operational parameters for batteries of variable power sources.
SubtypeArticle
KeywordBattery Battery Models Initial State-of-charge (Soc0) State-of-charge (Soc)
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/sc400430e
WOS Subject ExtendedChemistry ; Engineering
WOS KeywordSTATE-OF-CHARGE ; OPEN-CIRCUIT VOLTAGE ; BATTERY MODEL ; ESTIMATOR ; DESIGN
Indexed BySCI
Language英语
WOS SubjectChemistry, Multidisciplinary ; Engineering, Chemical
WOS IDWOS:000334092600008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10711
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang, Yanhui,Song, Wenji,Lin, Shili,et al. Multiparameters Model of the Initial SOC Considering the Relaxation Effect[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2014,2(4):599-605.
APA Zhang, Yanhui,Song, Wenji,Lin, Shili,&Feng, Ziping.(2014).Multiparameters Model of the Initial SOC Considering the Relaxation Effect.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2(4),599-605.
MLA Zhang, Yanhui,et al."Multiparameters Model of the Initial SOC Considering the Relaxation Effect".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2.4(2014):599-605.
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