Simulation Analysis of Battery Pack Bottom Ball Strike Based on LS-DYNA

When the battery pack’s bottom collides with an obstacle, it experiences a quasi-static or dynamic impact. This study presents a method for analyzing the factors influencing the safety of the battery system’s bottom structure. The proposed method involves using a rigid ball head to simulate the impact of road obstacles on the battery pack. Through quasi-static ball strike tests and simulation analysis, the deformation and stress of the battery pack’s shell were evaluated. The experimental and simulation models effectively replicated the bottom deformation of the battery pack, with the simulation results closely aligning with the experimental trends. This confirms the effectiveness of the proposed method and simulation model. The study further examines the impact force and stress on the shell considering factors like ball impact energy and speed. The analysis provides a comprehensive understanding of the battery pack’s safety performance under bottom ball impacts and serves as a data source for the design, testing, evaluation, and optimization of the battery pack’s bottom structure.