| 引用本文: | 严干贵,蔡长兴,段双明,李军徽,刘莹.锂离子储能电池成组方式优化[J].电力自动化设备,2021,41(4): |
| YAN Gangui,CAI Changxing,DUAN Shuangming,LI Junhui,LIU Ying.Grouping mode optimization of lithium-ion energy storage battery[J].Electric Power Automation Equipment,2021,41(4): |
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| 摘要: |
| 电池组内单体电池的分散性问题降低了电池组的可用容量和循环寿命。针对电池成组方式对电池组可用容量与循环寿命的影响问题，基于电池的Thevenin等效模型，分析了并联电池间不平衡电流交叉现象产生的原因及作用；研究了不同成组方式对电池组可用容量的影响，提出了表征电池组容量分散性的容量极差和容量分散度指标；通过仿真分析，得到了提升电池组可用容量的组合方式。搭建了电池组性能测试平台，比较了6种拓扑结构锂离子电池模组的寿命衰减特征，遴选出了减缓电池组循环寿命衰减的成组结构。 |
| 关键词: 锂离子储能 电池组 分散性 可用容量 循环寿命 容量极差 容量分散度 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(U1766204)；东北电力大学博士科研启动基金资助项目(BSJXM-2019101) |
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| Grouping mode optimization of lithium-ion energy storage battery |
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YAN Gangui, CAI Changxing, DUAN Shuangming, LI Junhui, LIU Ying
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Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education, Northeast Electric Power University, Jilin 132012, China
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| Abstract: |
| The dispersity of single cells in the battery pack reduces the available capacity and cycle life of the battery pack. Aiming at the above problem, based on the Thevenin equivalent model of battery, the cause and effect of unbalanced current crossover among parallel cells are analyzed. The influence of different grouping modes on the available capacity of battery pack is studied, and the capacity range and capacity dispersion degree indexes representing the capacity dispersity of the battery pack are proposed. The performance test platform of battery pack is built, the life attenuation characteristics of six lithium-ion battery modules with different topological structures are compared, and the grouping structures which can reduce the cycle life attenuation of battery pack are selected. |
| Key words: lithium-ion energy storage battery pack dispersity available capacity cycle life capacity range capacity dispersion degree |
