储能科学与技术2025，Vol.14Issue(4)：1668-1678,11.DOI:10.19799/j.cnki.2095-4239.2024.0963
钠离子电池的阶梯充电策略及优化
Step-charging strategy and optimization of sodium-ion batteries
单福星 1霍海波 1张铮 1渐彬彬 2陈军3
作者信息
- 1. 上海海洋大学工程学院,上海 201306
- 2. 国家锂电池产品质量检验检测中心(山东)
- 3. 枣庄高信建筑工程检测有限公司,山东 枣庄 277800
- 折叠
摘要
Abstract
Electric vehicles that rely on lithium-ion batteries for energy face dual challenges of safety and cost.An emerging alternative,sodium-ion batteries,share similar working principles with lithium-ion batteries,while being more economical and inherently safer.To achieve the rapid charging of sodium-ion batteries,this study proposes an optimized nine-step voltage cutoff charging strategy,developed based on the analysis of DC internal resistance changes and differential voltage analysis to monitor characteristic peak variations.The proposed strategy adjusts current limitations across three charging phases(early,middle,and late)to address specific issues,namely high DC internal resistance at low states of charge(SOC)during early charging,increased risk of damage at medium and high SOC regions,caused by high-rate charging and graphite characteristic peak activity.This strategy is compared against existing methods,including the constant current constant voltage(CCCV)charging method and a three-capacity cutoff tiered charging method,by analyzing 150 charging cycles.Experimental results show that,under the same constraints,the proposed battery aging strategies outperform the CCCV charging method.Specifically,compared with the optimized CCCV standard charging,the proposed strategies reduce charging time by 19.04%,improve battery health state by 7.4%,and decrease internal resistance attenuation by 17.8%.关键词
钠离子电池/阶梯充电/电池老化Key words
sodium ion battery/step charging/battery aging分类
信息技术与安全科学引用本文复制引用
单福星,霍海波,张铮,渐彬彬,陈军..钠离子电池的阶梯充电策略及优化[J].储能科学与技术,2025,14(4):1668-1678,11.
