Modeling stresses in the separator of a pouch lithium-ion cell

► A multi-physics model is built to reveal the stresses in the separator of a pouch Li-ion cell. ► The maximum stress in the separator is found around its inner corner. ► The temperature variation is found to have a significant effect on stresses in the separator. ► Increase the separator thickness and effective frictions will increase the stress. ► The size of the active particles does not affect the stresses in the separator.