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首页> 外文期刊>Journal of power sources >Internal-short-mitigating current collector for lithium-ion battery
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Internal-short-mitigating current collector for lithium-ion battery

机译：锂离子电池的内部短路缓解电流收集器

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摘要

Mechanical abuse often causes thermal runaway of lithium-ion battery (LIB). When a LIB cell is impacted, radial cracks can be formed in the current collector, separating the electrode into petals. As separator ruptures, the petals on positive and negative electrodes may contact each other, forming internal short circuit (ISC). In this study, we conducted an experimental investigation on LIB coin cells with current collectors modified by surface notches. Our testing results showed that as the current collector contained appropriate surface notches, the cracking mode of electrode in a damaged LIB cell could be adjusted. Particularly, if a complete circumferential crack was generated, the petals would be cut off, which drastically reduced the area of electrode involved in ISC and the associated heat generation rate. A parameterized study was performed to analysis various surface-notch configurations. We identified an efficient surface-notch design that consistently led to trivial temperature increase of ISC. (C) 2017 Elsevier B.V. All rights reserved.
机译：机械滥用通常会导致锂离子电池（LIB）的热失控。当LIB电池受到冲击时，会在集电器中形成径向裂纹，从而将电极分成花瓣。随着隔板破裂，正极和负极上的花瓣可能会相互接触，从而形成内部短路（ISC）。在这项研究中，我们对带有表面凹口修饰的集电器的LIB纽扣电池进行了实验研究。我们的测试结果表明，由于集电器包含适当的表面槽口，可以调整损坏的LIB电池中电极的开裂模式。特别地，如果产生了完整的圆周裂纹，则花瓣将被切掉，这将大大减少ISC所涉及的电极面积以及相关的发热率。进行了参数化研究，以分析各种表面缺口构造。我们确定了一种有效的表面缺口设计，该设计始终导致ISC的温升小幅增长。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of power sources》 |2017年第may1期|84-93|共10页
  • 作者

    Wang Meng; Le Anh V.; Noelle Daniel J.; Shi Yang; Meng Y. Shirley; Qiao Yu;

  • 作者单位

    Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Program Mat Sci & Engn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Program Mat Sci & Engn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Dept Nanoengn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA|Univ Calif San Diego, Program Mat Sci & Engn, La Jolla, CA 92093 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium-ion battery; Current collector; Mechanical abuse; Internal short; Thermal runaway;

    机译：锂离子电池;集电器;机械滥用;内部短路;热失控;

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