Towards Determining an Engineering Stress-Strain Curve and Damage of the Cylindrical Lithium-Ion Battery Using the Cylindrical Indentation Test

Mechanical internal short circuit (ISC) is one of the significant safety issues in lithium-ion battery design. As a result, it possible to subject LIB cells thorough mechanical abuse tests determine when and why failure may occur. The indentation test recommended loading condition for evaluating damage ISC. In this study, 18,650 cylindrical underwent voltage reduction following peak force identified by Due complexity contact surface shape between two cylinders (LIB cell indenter), new phenomenological analytical model proposed measure projected area, which FEM confirms. Moreover, stress-strain curve Young’s modulus were calculated from load-depth data. contrast previously published models, developed paper assumes anisotropic hyperelasticity (the transversely isotropic case) predicts growing load-carrying capacity (scalar damage), whose variation regulated Caputo-Almeida fractional derivative.