Based on the experimental observation, pouch cells can withstand severe deformation during fully confined in-plane compression with flat punches without any risks of a short circuit. During the deformation, the structuralbehavior is characterized by regular kinks, buckles, and shear bands. This study aims to provide a modeling approach for the in-plane compression on lithium-ion pouch batteries in a fully confined case with a flat punch. To capture the right mechanism of buckling while maintaining a satisfactory computational efficiency, two approaches are proposed: a homogenized model with imperfections and an enhanced homogenized model with equivalent layers of metal foils. The first approach introduces periodic geometrical imperfections with a wavelength as observed in the experiments. The second one creates a model in between the homogenized model and detailed model with equivalent properties of coating materials and metal foils. It is concluded that the introduction of impe...

中文翻译：

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平面载荷作用下锂离子袋式电池的机械变形-第二部分：计算模型

根据实验观察，袋形电池在用扁平冲头完全限制的面内压缩过程中可以承受严重变形，而没有任何短路风险。在变形过程中，结构行为的特征在于规则的扭结，弯曲和剪切带。这项研究旨在为完全封闭的扁平打孔机壳中的锂离子袋式电池的面内压缩提供一种建模方法。为了在保持令人满意的计算效率的同时捕捉正确的屈曲机理，提出了两种方法：具有缺陷的均质模型和具有等效金属箔层的增强均质模型。第一种方法引入了周期性的几何缺陷，如实验中观察到的那样。第二个模型在均质模型和详细模型之间创建一个模型，该模型具有与涂层材料和金属箔相同的特性。可以得出结论，引入...