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锂离子电池自放电机理及测量方法
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  • 英文篇名:Self-discharge mechanism and measurement methods for lithium ion batteries
  • 作者:裴普成 ; 陈嘉瑶 ; 吴子尧
  • 英文作者:PEI Pucheng;CHEN Jiayao;WU Ziyao;Key Laboratory of Automotive Safety and Energy,Tsinghua University;
  • 关键词:锂离子电池 ; 自放电 ; 机理 ; 测量方法
  • 英文关键词:lithium ion battery;;self-discharge;;mechanism;;measurement methods
  • 中文刊名:QHXB
  • 英文刊名:Journal of Tsinghua University(Science and Technology)
  • 机构:清华大学汽车安全与节能国家重点试验室;
  • 出版日期:2018-10-18 11:26
  • 出版单位:清华大学学报(自然科学版)
  • 年:2019
  • 期:v.59
  • 基金:国家重点研发计划项目(2017YFB0102705,2016YFB0101305);; 国家自然科学基金项目(21676158)
  • 语种:中文;
  • 页:QHXB201901008
  • 页数:13
  • CN:01
  • ISSN:11-2223/N
  • 分类号:55-67
摘要
在锂离子电池的出厂检测及退役后的梯次利用阶段,为了保证成组电池的一致性,需要对电池的自放电率进行测量。该文系统阐述了锂离子电池各部分结构的自放电机理及影响因素,并总结了目前国内外测量自放电率的两类主要方法:静置测量方法通过对电池进行长时间静置得到自放电率,测量时间过长;动态测量方法通过结合等效电路模型等,可以在动态过程中完成参数辨识,在缩短测量时间方面取得了一定的进展。对动态测量方法的实验设计进行创新优化,将是实现自放电率快速测量的发展方向。
        During pre-delivery inspections of lithium ion batteries and the staggered utilization phase after elimination,the battery self-discharge rate needs to be measured to confirm the uniformity of the lithium ion batteries.This study analyzed the lithium ion battery self-discharge mechanisms, the key factors affecting the self-discharge,and the two main methods for measuring the self-discharge rate. The deposit method for measuring the self-discharge rate stores the batteries for a long time,which is very time consuming.The dynamic method measures the self-discharge rate over a short period based on an equivalent circuit model which significantly shortens the measuring time.The dynamic method needs to be further optimized to realize rapid measurements.
引文
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