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首页> 外文期刊>Energy >Over-heating triggered thermal runaway behavior for lithium-ion battery with high nickel content in positive electrode
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Over-heating triggered thermal runaway behavior for lithium-ion battery with high nickel content in positive electrode

机译：正电极中具有高镍含量的锂离子电池的过热触发热失控行为

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摘要

The thermal abuse of high specific energy NCM811 lithium-ion power battery in the process of use or safety test was simulated by winding resistance wire heating method, and local heating and uniform heating were carried out to trigger a thermal runaway. When thermal runaway triggered by uniform heating, the safety valve is opened timely and only open flame occurred without explosion, it did not cause the internal short circuit, and the safety valve was not damaged. However, when thermal runaway triggered by the local heating method, it caused a serious internal short circuit, the released electrolyte and other material burned violently and exploded, and the safety valve was completely damaged. In this process, a thin film heat flux sensor is also used to quantify the surface heat flux during thermal runaway, which could provide the test method and calculation basis for the thermal management design. The experimental results were also compared with those of NCM111, NCM 532 and NCM 622 batteries, the results revealed that increase of nickel content in positive electrode would also increase the degree of damage when a TR triggered by local heating method.(c) 2021 Elsevier Ltd. All rights reserved.
机译：通过绕组电阻线加热方法模拟使用或安全测试过程中的高特定能量NCM811锂离子电池的热滥用，并进行局部加热和均匀加热以引发热失控。当通过均匀加热触发的热失控时，安全阀及时打开，只有打开火焰而没有爆炸，它没有导致内部短路，安全阀没有损坏。然而，当通过本地加热方法触发的热失控时，它引起了一个严重的内部短路，释放的电解质和其他材料剧烈爆炸，安全阀完全损坏。在该过程中，薄膜热通量传感器还用于在热失控期间量化表面热通量，这可以为热管理设计提供测试方法和计算依据。还将实验结果与NCM111，NCM 532和NCM 622电池相比，结果显示，当通过局部加热方法引发的TR时，正电极中镍含量的增加也会增加损坏程度。（c）2021 Elsevier有限公司保留所有权利。

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  • 来源
    《Energy》 |2021年第1期|120072.1-120072.9|共9页
  • 作者

    Wang Haimin; Shi Weijie; Hu Feng; Wang Yufei; Hu Xuebin; Li Huanqi;

  • 作者单位

    Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China|Shanghai Key Lab Multiphase Flow & Heat Transfer Shanghai 200093 Peoples R China;

    Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium-ion battery; NCM811; Thermal runaway; Uniform heating; Local heating; Heat flux;

    机译：锂离子电池;NCM811;热失控;均匀的加热;局部加热;热通量;

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