锂离子电池用微米厚度超薄集流体Cu箔和Al箔疲劳强度及损伤行为

程福来, 罗雪梅, 胡炳利, 张滨, 张广平

Fatigue Strength and Damage Behavior of Micron-Thick Ultrathin Current Collector Cu Foil and Al Foil for Lithium-Ion Battery

CHENG Fulai, LUO Xuemei, HU Bingli, ZHANG Bin, ZHANG Guangping

图11 不同厚度Al箔的Kitagawa-Takahashi图

Fig.11 Kitagawa-Takahashi diagram of the Al foils with different thicknesses described by the El-Haddad formulation considering the expected defect distribution (Data points of the black rhombus and blue circle are the experimental fatigue limit (from Fig.5b), and shaded areas of black and blue lines are the cumulative probability of defect size (from Fig.10b) for Al foils with thicknesses of 10 and 13 μm, respectively; R—fatigue stress ratio; area0—intrinsic defect size)