Mechanical performance study and simulation of aluminum-plastic film in pouch Lithium-ion battery based on ductile fracture criterion

The expanding market of new energy vehicles has raised an urgent demand for battery safety. As a crucial component of pouch batteries, the performance of aluminum-plastic film directly impacts the overall safety of the battery. This paper conducts a macro-level study on the mechanical performance of aluminum-plastic film and presents a comprehensive modeling method for simulating the film's behavior. Since aluminum-plastic film is a thin membrane material, conventional methods for measuring material fracture parameters are not applicable. To address this issue, the paper designs a series of experiments using simulation techniques and obtains calibrated parameters for the ductile fracture criterion of the aluminum-plastic film. Consequently, a simulation model is developed to accurately represent the fracture characteristics. The simulation results effectively reflect the actual mechanical properties and fracture behavior of the aluminum-plastic film.