Battery Aging Behavior Evaluation Under Variable and Constant Temperatures with Real Loading Profiles

2023 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2023-03-19 DOI:10.1109/APEC43580.2023.10131534

Yunhong Che, D. Stroe, Xin Sui, Sϕren Byg Vilsen, Xiaosong Hu, R. Teodorescu

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引用次数: 1

Abstract

Studying and analyzing battery aging behavior is crucial in battery health prognostic and management. This paper conducts novel and comprehensive experiments to evaluate battery aging under variable external stresses, including different dynamic load profiles and variable environmental temperatures. Respond analysis in the time and frequency domain is performed to account for the different aging rates under different current loadings, where the statistic calculation and fast Fourier transform are used for the analysis. The empirical model is used to fit the fade curve for the comparisons between constant and variable temperatures. The capacity decrease and internal resistance increase are extracted to evaluate capacity and power fade, respectively. The experimental results show that the urban dynamic operating conditions help to prolong the service life compared to the constant current aging case. In contrast, the aging under the highway profile accelerates the aging process. Although the average temperature is the same as under constant temperature conditions, variable temperature conditions accelerate battery aging.

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电池在变温和恒温条件下的老化性能评估

研究和分析电池老化行为对电池健康预测和管理至关重要。本文进行了新颖而全面的实验，以评估电池在可变外部应力下的老化，包括不同的动态负载曲线和可变环境温度。针对不同电流载荷下的不同老化速率，采用统计计算和快速傅立叶变换进行时域和频域响应分析。用经验模型拟合了恒温与变温比较的衰减曲线。提取容量减小量和内阻增加量，分别评价容量衰减和功率衰减。实验结果表明，与恒流老化工况相比，城市动态工况有利于延长使用寿命。相反，高速公路剖面下的老化加速了其老化过程。虽然平均温度与恒温条件下相同，但变温条件会加速电池老化。

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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2023 IEEE Applied Power Electronics Conference and Exposition (APEC)

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