加载角度和线型缺口对锂离子电池隔膜拉伸性能的影响

薛鹏程 范文杰 王根伟 王彬

薛鹏程, 范文杰, 王根伟, 王彬. 加载角度和线型缺口对锂离子电池隔膜拉伸性能的影响[J]. 高压物理学报, 2020, 34(1): 015301. doi: 10.11858/gywlxb.20190765
引用本文: 薛鹏程, 范文杰, 王根伟, 王彬. 加载角度和线型缺口对锂离子电池隔膜拉伸性能的影响[J]. 高压物理学报, 2020, 34(1): 015301. doi: 10.11858/gywlxb.20190765
XUE Pengcheng, FAN Wenjie, WANG Genwei, WANG Bin. Effects of Loading Angle and Linear Notch on Tensile Properties of Lithium-Ion Battery Separator[J]. Chinese Journal of High Pressure Physics, 2020, 34(1): 015301. doi: 10.11858/gywlxb.20190765
Citation: XUE Pengcheng, FAN Wenjie, WANG Genwei, WANG Bin. Effects of Loading Angle and Linear Notch on Tensile Properties of Lithium-Ion Battery Separator[J]. Chinese Journal of High Pressure Physics, 2020, 34(1): 015301. doi: 10.11858/gywlxb.20190765

加载角度和线型缺口对锂离子电池隔膜拉伸性能的影响

doi: 10.11858/gywlxb.20190765
基金项目: 国家自然科学基金(11872265);山西省青年科技研究基金(201701D221142)
详细信息
    作者简介:

    薛鹏程(1993-),男,硕士,主要从事动力电池隔膜的力学性能研究. E-mail: 1014957490@qq.com

    通讯作者:

    王根伟(1974-),男,博士,副教授,主要从事新能源汽车安全与轻量化研究.E-mail: gwang@tyut.edu.cn

  • 中图分类号: O348.3

Effects of Loading Angle and Linear Notch on Tensile Properties of Lithium-Ion Battery Separator

  • 摘要: 锂离子电池隔膜作为防止正负极接触的物理屏障,其结构完整性对于电池安全至关重要。进行了4种商业隔膜单轴拉伸实验,分析加载角度和线型缺口对隔膜材料拉伸强度、弹性模量、断裂模式的影响。结果表明:无缺口试样在0°方向上的拉伸强度最大,90°方向上拉伸强度最小;当两个无缺口试样的加载角度互为补角时,它们的拉伸强度接近。对于缺口试样而言,缺口方向沿着90°的试样有最大破坏载荷;线型缺口试样有更高的弹性模量,但是塑性变形大幅减少。无缺口试样和缺口试样在拉伸过程中的断裂模式相同,即除0°试样沿横向断裂外,其他加载角度的试样均沿着纵向断裂。

     

  • 图  SC-16的SEM图像

    Figure  1.  SEM image of SC-16

    图  加载角度示意图

    Figure  2.  Schematic of the loading angle

    图  线型缺口试样示意图

    Figure  3.  Schematic of the linear notched specimen

    图  无缺口试样在8个加载角度上的应力-应变曲线

    Figure  4.  Stress-strain curve of unnotched specimens at 8 loading angles

    图  S-25的0°缺口试样在不同位置处的力-位移曲线

    Figure  5.  Load-displacement curve of the 0° notched specimens at different positions for S-25

    图  缺口试样与无缺口试样应力-应变曲线的比较

    Figure  6.  Comparison of stress-strain curves between notched specimens and unnotched specimens

    表  1  不同加载角度下无缺口试样的拉伸强度

    Table  1.   Tensile strength of unnotched specimens at different loading angles

    Specimen typeσθ/MPaσ0/σ90
    30°45°60°90°120°135°150°
    S-25107.8 ± 10.826.3 ± 1.717.3 ± 0.313.1 ± 0.410.0 ± 0.213.8 ± 0.519.1 ± 1.225.4 ± 1.210.8
    S-16127.3 ± 10.637.7 ± 1.525.4 ± 1.219.7 ± 0.315.7 ± 0.519.4 ± 0.525.7 ± 1.138.3 ± 0.8 8.1
    SC-16101.2 ± 4.9 30.9 ± 1.821.6 ± 1.116.9 ± 0.413.8 ± 0.417.1 ± 0.520.8 ± 1.729.5 ± 3.1 7.3
    DC-1698.7 ± 7.727.1 ± 2.118.1 ± 0.815.2 ± 0.413.8 ± 0.415.1 ± 0.619.2 ± 0.426.5 ± 1.7 7.2
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出版历程
  • 收稿日期:  2019-04-25
  • 修回日期:  2019-05-08

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