关键词: 方形模组；有限元分析；膨胀力；压缩泡棉

Abstract: In the cycle process, with the accumulation of charge and discharge times, the expansion force of the battery cell continues to increase, and the volume of the battery cell becomes significantly larger, which is manifested as the bulge of the battery cell, which may affect the structural performance of the entire module. Therefore, it is of great significance to study the expansion force of the cell and the effect of the expansion force on the structure of the end and side panels of the module. In this paper, the effect of foam on the expansion respiration is studied by using the equivalent form of thermal expansion to simulate the expansion force generated by the cell during the cycle. The results show that the foam has a certain effect on the absorption of expansion force, and the selection of suitable foam is of great significance for the cyclic expansion of the cell. Based on this model, the expansion comparison between the side-welded and the side-welded modules is studied. The expansion resistance of the side-welded modules is better than that of the side-welded modules, which provides guidance for the subsequent expansion design of modules.

Key words: Square module; Finite element analysis; Expansive force; Compression foam