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An Energy Efficiency Evaluation Research Based on Heat Generation Behavior of Lithium-Ion Battery
Zhang, Yanhui1,2; Song, Wenji2; Feng, Ziping2
2013
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume160Issue:11Pages:A1927-A1930
AbstractEnergy efficiency across a range of state of charge (SOC) is an important performance parameter in variable Battery Energy Storage System (BESS). A novel method was proposed to evaluate the effect of heat generation with the parameters of resistance and entropy change on the energy efficiency. The energy efficiency was evaluated through measuring the resistance and entropy change during different DOD (depth of discharge). The internal resistance was determined by constant current discharge, followed by plots of V vs I at constant SOC, and found it exhibit a reduction as SOC increasing. In addition, the entropy change was measured by the temperature change of the open-circuit voltage. Energy efficiency results were obtained at constant charge input levels and different discharge rates under the different DOD. The result show that the energy efficiency has a decreasing trend with the increase of the depth of discharge, and the energy efficiency plateaus at 60% DOD. The energy efficiency is decreased from 88.8% to 87.3% under 1C discharge from 20% to 80% DOD. Furthermore, the lower the current rate, the higher the energy efficiency under the constant DOD. We isolate the effects of undercharge and underdischarge, and find the difference of energy efficiency under different current rate increases gradually with the increase of DOD. (C) 2013 The Electrochemical Society. All rights reserved.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1149/2.021311jes
WOS Subject ExtendedElectrochemistry ; Materials Science
WOS KeywordENTROPY ; HYBRID
Indexed BySCI
Language英语
WOS SubjectElectrochemistry ; Materials Science, Coatings & Films
WOS IDWOS:000326905000001
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10067
Collection中国科学院广州能源研究所
Affiliation1.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang, Yanhui,Song, Wenji,Feng, Ziping. An Energy Efficiency Evaluation Research Based on Heat Generation Behavior of Lithium-Ion Battery[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2013,160(11):A1927-A1930.
APA Zhang, Yanhui,Song, Wenji,&Feng, Ziping.(2013).An Energy Efficiency Evaluation Research Based on Heat Generation Behavior of Lithium-Ion Battery.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,160(11),A1927-A1930.
MLA Zhang, Yanhui,et al."An Energy Efficiency Evaluation Research Based on Heat Generation Behavior of Lithium-Ion Battery".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 160.11(2013):A1927-A1930.
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