Analysis of energy storage battery degradation under different electrical stress levels

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-05-16 DOI:10.1016/j.csite.2025.106355

Yuanyuan Xie , Caihong Li , Tingting Wu , Run Tang , Yanxin Hu , Yishun Zhu , Huihe Qiu , Rui Zhang

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Abstract

Exploring the aging characteristics of batteries and investigating their degradation mechanisms are crucial for optimizing battery usage and developing reliable energy storage systems. In this work, we utilize an equivalent circuit model to analyze the input and output data of the battery, identifying changes in the battery's internal parameters during the aging process. The results indicate that aging cycle tests conducted using three discharge modes—1C, 3C, and over-discharge—show capacity retention rates with linear, sub-linear, and super-linear evolutionary trajectories, respectively. During cyclic testing at 1C discharge, structural changes in the graphite anode due to prolonged cycling lead to decreased charge transfer efficiency, which is the primary cause of performance degradation. Under 3C discharge conditions, high currents result in the formation and growth of the solid electrolyte interphase (SEI) film, electrolyte decomposition, and structural changes in the electrode materials, all of which accelerate the rate of battery aging. In over-discharge mode, the main cause of aging is attributed to current collector corrosion and the decomposition of electrolyte components. Furthermore, under 3C discharge conditions, the battery performance exhibits the fastest degradation rate, with heat generation power increasing nearly threefold compared to the initial test, while the power decay rate is approximately 0.7.

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不同电应力水平下储能电池退化分析

探索电池的老化特性及其退化机制对于优化电池使用和开发可靠的储能系统至关重要。在这项工作中，我们利用等效电路模型来分析电池的输入和输出数据，识别电池在老化过程中内部参数的变化。结果表明，在1c、3C和过放电三种放电模式下进行的老化循环试验中，容量保持率分别呈现线性、亚线性和超线性进化轨迹。在1C放电循环测试中，由于长时间循环导致石墨阳极结构变化，导致电荷转移效率降低，这是导致性能下降的主要原因。在3C放电条件下，大电流导致固体电解质界面（SEI）膜的形成和生长，电解液的分解，电极材料的结构变化，这些都加速了电池的老化速度。在过放电模式下，老化的主要原因是集电极腐蚀和电解液成分的分解。此外，在3C放电条件下，电池性能的退化速度最快，发热量比初始测试增加了近3倍，而功率衰减率约为0.7。

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

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.