Experimental temperature variation in battery pack with unbalanced SOCs during charging process

2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA) Pub Date : 2018-05-01 DOI:10.1109/ICIEA.2018.8397974

Bo Yang, Zhenyu Chen, J. Xue, Qingqiang Xu, Jinlei Sun, Yuhua Xiao, Zhao Liu

引用次数: 2

Abstract

The State of Charge (SOC) inconsistency is common for battery pack after long-term cycling. The unbalanced SOCs is a threat to thermal safety and performance. For this work, five cells were connected in series to build a pack with initial SOCs 0%,5%,10%,15%,20%. Charging experiments are taken with charging rates 12A (0.3C), 20A(0.5C), 40A(1C), respectively. The temperature distribution is analyzed. The results of this work demonstrate that the increase of SOC gap results in the increase of temperature non-uniformity. The temperature difference is little for cells with 5%–10% SOC gap, while the temperature difference reaches 6D for cells during charging at 40A with 20% SOC gap.

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非平衡soc电池组在充电过程中的温度变化实验

充电状态(SOC)不一致是电池组长期循环后的常见问题。不平衡的soc是对热安全和性能的威胁。在这项工作中，将五个电池串联起来，构建一个初始soc为0%，5%，10%，15%，20%的电池组。分别以12A (0.3C)、20A(0.5C)、40A(1C)的充电速率进行充电实验。对温度分布进行了分析。研究结果表明，SOC间隙的增加导致温度不均匀性的增加。当电池的荷电状态间隙为5% ~ 10%时，电池的温度差异很小，而当电池的荷电状态间隙为20%时，电池在40A充电时的温度差异达到6D。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA)

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