Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems
As a critical subsystem in electric vehicles and smart grids, a battery energy storage system plays an essential role in enhancement of reliable operation and system performance. In such applications, a battery energy storage system is required to provide high energy utilization efficiency, as well...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-06-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/9/7/498 |
| _version_ | 1818035573605007360 |
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| author | Weiping Diao Jiuchun Jiang Hui Liang Caiping Zhang Yan Jiang Leyi Wang Biqiang Mu |
| author_facet | Weiping Diao Jiuchun Jiang Hui Liang Caiping Zhang Yan Jiang Leyi Wang Biqiang Mu |
| author_sort | Weiping Diao |
| collection | DOAJ |
| description | As a critical subsystem in electric vehicles and smart grids, a battery energy storage system plays an essential role in enhancement of reliable operation and system performance. In such applications, a battery energy storage system is required to provide high energy utilization efficiency, as well as reliability. However, capacity inconsistency of batteries affects energy utilization efficiency dramatically; and the situation becomes more severe after hundreds of cycles because battery capacities change randomly due to non-uniform aging. Capacity mismatch can be solved by decomposing a cluster of batteries in series into several low voltage battery packs. This paper introduces a new analysis method to optimize energy utilization efficiency by finding the best number of batteries in a pack, based on capacity distribution, order statistics, central limit theorem, and converter efficiency. Considering both battery energy utilization and power electronics efficiency, it establishes that there is a maximum energy utilization efficiency under a given capacity distribution among a certain number of batteries, which provides a basic analysis for system-level optimization of a battery system throughout its life cycle. Quantitative analysis results based on aging data are illustrated, and a prototype of flexible energy storage systems is built to verify this analysis. |
| first_indexed | 2024-12-10T06:57:12Z |
| format | Article |
| id | doaj.art-11a55c75894a45aba770cdb142bb5016 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-12-10T06:57:12Z |
| publishDate | 2016-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-11a55c75894a45aba770cdb142bb50162022-12-22T01:58:25ZengMDPI AGEnergies1996-10732016-06-019749810.3390/en9070498en9070498Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage SystemsWeiping Diao0Jiuchun Jiang1Hui Liang2Caiping Zhang3Yan Jiang4Leyi Wang5Biqiang Mu6National Active Distribution Network Technology Research Center (NANTEC), Beijing Jiaotong University, Beijing 100044, ChinaNational Active Distribution Network Technology Research Center (NANTEC), Beijing Jiaotong University, Beijing 100044, ChinaNational Active Distribution Network Technology Research Center (NANTEC), Beijing Jiaotong University, Beijing 100044, ChinaNational Active Distribution Network Technology Research Center (NANTEC), Beijing Jiaotong University, Beijing 100044, ChinaNational Active Distribution Network Technology Research Center (NANTEC), Beijing Jiaotong University, Beijing 100044, ChinaDepartment of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202, USAThe Key Laboratory of Systems and Control of CAS, Institute of Systems Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, ChinaAs a critical subsystem in electric vehicles and smart grids, a battery energy storage system plays an essential role in enhancement of reliable operation and system performance. In such applications, a battery energy storage system is required to provide high energy utilization efficiency, as well as reliability. However, capacity inconsistency of batteries affects energy utilization efficiency dramatically; and the situation becomes more severe after hundreds of cycles because battery capacities change randomly due to non-uniform aging. Capacity mismatch can be solved by decomposing a cluster of batteries in series into several low voltage battery packs. This paper introduces a new analysis method to optimize energy utilization efficiency by finding the best number of batteries in a pack, based on capacity distribution, order statistics, central limit theorem, and converter efficiency. Considering both battery energy utilization and power electronics efficiency, it establishes that there is a maximum energy utilization efficiency under a given capacity distribution among a certain number of batteries, which provides a basic analysis for system-level optimization of a battery system throughout its life cycle. Quantitative analysis results based on aging data are illustrated, and a prototype of flexible energy storage systems is built to verify this analysis.http://www.mdpi.com/1996-1073/9/7/498batteryflexible groupconverter efficiencyenergy utilization efficiency |
| spellingShingle | Weiping Diao Jiuchun Jiang Hui Liang Caiping Zhang Yan Jiang Leyi Wang Biqiang Mu Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems Energies battery flexible group converter efficiency energy utilization efficiency |
| title | Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems |
| title_full | Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems |
| title_fullStr | Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems |
| title_full_unstemmed | Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems |
| title_short | Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems |
| title_sort | flexible grouping for enhanced energy utilization efficiency in battery energy storage systems |
| topic | battery flexible group converter efficiency energy utilization efficiency |
| url | http://www.mdpi.com/1996-1073/9/7/498 |
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