不同荷电状态下的锂离子电池大倍率脉冲充电特性  

High-rate pulse charging characteristics of lithium-ion batteries under different state of charge

作　　者：龙鑫林 武杨洋 LONG Xinlin;WU Yangyang(National Key Laboratory of Electromagnetic Energy,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电磁能技术全国重点实验室,湖北武汉430033

出　　处：《国防科技大学学报》2024年第6期210-218,共9页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(51877211,52107137,52107173)。

摘　　要：为了进一步扩展锂电池的应用范围,以电磁发射场景中高功率能量回收为背景,研究了锂离子电池在不同荷电状态的大倍率脉冲充电特性。以准二维电化学模型为基础,通过优化扩散系数,建立了高功率锂电池大倍率脉冲充电模型,并利用该模型分析了锂电池在不同荷电状态下大倍率脉冲充电的镀锂过电位变化情况。通过对锂电池开展循环实验和事后分析,研究了锂电池在不同荷电状态下大倍率脉冲充电的老化行为和老化机理,该老化机理与仿真分析所得结果一致。以上研究结果不仅可以为锂电池在高功率能量回收场景中的应用提供参考,还可为快充型锂电池的优化提供参考。In order to further expand the application range of lithium batteries,the high-rate pulse charging characteristics of lithium-ion batteries in different state of charge were studied based on the high-power energy recovery in electromagnetic launch scenarios.Based on the pseudo-two-dimensions electrochemical model,a high-rate pulse charging model of high-power lithium batteries was established by optimizing the diffusion coefficient.This model was used to analyze the variation of lithium deposition potential of lithium batteries charged by high-rate pulse with different state of charge.Through the cycling experiment and post-mortem analysis of lithium batteries,the aging behavior and aging mechanism of lithium batteries in different state of charge high-rate pulse charging were studied,and the aging mechanism is consistent with the simulation analysis results.The above research results can not only provide a reference for the application of lithium batteries in high-power energy recovery scenarios,but also provide a reference for the optimization of fast-charging lithium batteries.

关 键 词：锂离子电池 准二维模型 大倍率脉冲充电 荷电状态 事后分析 

分 类 号：TM912[电气工程—电力电子与电力传动]