电源技术2025，Vol.49Issue(6)：1175-1182,8.DOI:10.3969/j.issn.1002-087X.2025.06.012
长期储存条件下某纽扣型蓝牙耳机电池失效机理解析
Failure mechanism analysis of button cells within bluetooth headsets under conditions of long-term storage
摘要
Abstract
The failure analysis of lithium-ion batteries is one of the important technical methods to op-timize and improve their electrochemical performance and safety,which is a complex and challenging systematic engineering.The button lithium cells within in bluetooth headsets with misfunction were taken as the failure analysis objects,and a set of customized test scheme was designed based on the historical working information of the cells and the functional characteristics of the whole equipment.By combining various non-destructive and destructive analysis techniques,the relationship between the macroscopic performance of the cell and the materials'microstructure was established,further revealing the aging mode and failure mechanism of the bluetooth headset cells under specific working conditions.The research results show that due to the functional design defects and long-term storage,the bluetooth headset cells are in a long-term deep discharge state,leading to a series of complex and parallel chemical reactions inside the cells under electrical abuse conditions,such as the oxidation of Cu collector,the adhesion reduction of the active materials on the collector,the decomposition and gas generation of the solid electrolyte interface film,the decomposition of the electrolyte and so on,fi-nally resulting in serious performance degradation of the cells with internal resistance increase and capacity loss.The study not only reveals the essential reason of failure of the cells within bluetooth headset under long-term storage conditions,but also provides valuable reference for future research on lithium-ion battery failure analysis in related fields.关键词
长期储存/蓝牙耳机电池/深度放电/失效分析/集流体Cu氧化Key words
long-term storage/bluetooth headset cells/deep discharge/failure analysis/collector Cu oxidation分类
信息技术与安全科学引用本文复制引用
汪红辉,李彦仪,储德韧,刘一凡,许铤..长期储存条件下某纽扣型蓝牙耳机电池失效机理解析[J].电源技术,2025,49(6):1175-1182,8.基金项目
上海市国资委企业创新发展和能级提升项目(2021012) （2021012）
