钠硫电池串并联电池组性能影响因素分析

发布时间：2018-08-01 12:29

【摘要】：为了研究钠硫电池串并联电池组性能影响因素,首先在并联支路容量、并联支路初始荷电状态、电池串并联连接方式一致的前提下,研究了并联支路欧姆内阻差异对钠硫电池组性能的影响,实验结果表明电池成组时选用欧姆内阻一致的电池能够减小并联支路在平台期和充电末端的不平衡电流,同时还能够减小并联支路之间的荷电状态累积差异;其次在单体电池内阻、电池组使用环境、电池组使用工况等参数一致的情况下,研究了不同串并联方式对钠硫电池组性能的影响,实验结果表明采用先串后并的连接方式时每个支路串联的电池数量越多,该并联支路电池内阻更接近该批次电池电池内阻平均值的整数倍,能够显著降低并联支路电流不平衡性和荷电状态累积差异。
[Abstract]:In order to study the influence factors on the performance of series and parallel batteries of sodium sulfur battery, the capacity of parallel branch, the initial charge state of parallel branch and the same connection mode of series-parallel connection of the battery are all the same. The effect of the ohmic internal resistance difference of parallel branch on the performance of sodium sulfur battery pack is studied. The experimental results show that the cell with the same ohmic internal resistance can reduce the unbalanced current of the parallel branch during the platform period and the charging end. At the same time, it can reduce the accumulative difference of charge state between the parallel branches. Secondly, under the condition of the same parameters such as the internal resistance of the single cell, the use environment of the battery, the operating condition of the battery, etc. The effect of different series-parallel modes on the performance of sodium sulfur battery pack is studied. The experimental results show that the more the number of cells in each branch is, The internal resistance of the parallel branch battery is closer to the integral times of the average internal resistance of the batch, which can significantly reduce the imbalance of the parallel branch current and the accumulative difference of the charged state.
【作者单位】：上海电气钠硫储能技术有限公司;国网上海市电力公司电力科学研究院;
【基金】：国家电网公司科技项目(52094014000M)~~
【分类号】：TM912

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