A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion Cells
Cell inconsistency can lead to poor performance and safety hazards. Therefore, cell equalizer is essentially required to prevent the series-connected cells from overcharging, undercharging, and overdischarging. Among current equalization schemes, passive equalizer has a continuously wasting energy w...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-12-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/7/12/366 |
| _version_ | 1798005919000297472 |
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| author | Xin Lai Chun Jiang Yuejiu Zheng Han Gao Peng Huang Long Zhou |
| author_facet | Xin Lai Chun Jiang Yuejiu Zheng Han Gao Peng Huang Long Zhou |
| author_sort | Xin Lai |
| collection | DOAJ |
| description | Cell inconsistency can lead to poor performance and safety hazards. Therefore, cell equalizer is essentially required to prevent the series-connected cells from overcharging, undercharging, and overdischarging. Among current equalization schemes, passive equalizer has a continuously wasting energy with low equalization efficiency, and active equalizer has high cost with complex circuit structure. In this study, a novel composite equalizer based on an additional cell with low complexity is presented. This method combines a passive equalizer and an active equalizer. Firstly, the configuration and circuit of our proposed composite equalizer are introduced, and the equalization principle is analyzed. On this basis, the control strategy and algorithm of the composite equalizer are further proposed. Finally, the composite equalizer is verified through simulation and experiment in various cases. The study results show that this method improves both the consistency level and the available capacity of the battery pack. Moreover, our proposed equalizer can overcome the shortcomings of commonly used equalizer and combining the advantages of different equalizer to maximize the equalization efficiency with a simpler equalizer structure. |
| first_indexed | 2024-04-11T12:46:45Z |
| format | Article |
| id | doaj.art-bc966e2325af4668b276ba3bee4e45a6 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-04-11T12:46:45Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-bc966e2325af4668b276ba3bee4e45a62022-12-22T04:23:20ZengMDPI AGElectronics2079-92922018-12-0171236610.3390/electronics7120366electronics7120366A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion CellsXin Lai0Chun Jiang1Yuejiu Zheng2Han Gao3Peng Huang4Long Zhou5College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCollege of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCollege of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCollege of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCollege of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCollege of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCell inconsistency can lead to poor performance and safety hazards. Therefore, cell equalizer is essentially required to prevent the series-connected cells from overcharging, undercharging, and overdischarging. Among current equalization schemes, passive equalizer has a continuously wasting energy with low equalization efficiency, and active equalizer has high cost with complex circuit structure. In this study, a novel composite equalizer based on an additional cell with low complexity is presented. This method combines a passive equalizer and an active equalizer. Firstly, the configuration and circuit of our proposed composite equalizer are introduced, and the equalization principle is analyzed. On this basis, the control strategy and algorithm of the composite equalizer are further proposed. Finally, the composite equalizer is verified through simulation and experiment in various cases. The study results show that this method improves both the consistency level and the available capacity of the battery pack. Moreover, our proposed equalizer can overcome the shortcomings of commonly used equalizer and combining the advantages of different equalizer to maximize the equalization efficiency with a simpler equalizer structure.https://www.mdpi.com/2079-9292/7/12/366lithium-ion power battery packcomposite equalizeractive equalizationpassive equalizationcontrol strategy and algorithm |
| spellingShingle | Xin Lai Chun Jiang Yuejiu Zheng Han Gao Peng Huang Long Zhou A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion Cells Electronics lithium-ion power battery pack composite equalizer active equalization passive equalization control strategy and algorithm |
| title | A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion Cells |
| title_full | A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion Cells |
| title_fullStr | A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion Cells |
| title_full_unstemmed | A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion Cells |
| title_short | A Novel Composite Equalizer Based on an Additional Cell for Series-Connected Lithium-Ion Cells |
| title_sort | novel composite equalizer based on an additional cell for series connected lithium ion cells |
| topic | lithium-ion power battery pack composite equalizer active equalization passive equalization control strategy and algorithm |
| url | https://www.mdpi.com/2079-9292/7/12/366 |
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