Environmental Exposure Effects on Battery Cell Packaging Material

The design of a Li-ion battery can impact a variety of characteristics of individual cells and of the resulting battery pack system. The pouch cell format offers the potential for low cell-level part count, light weight at the cell level and cell-level design flexibility; however, design considerations to accommodate the impact of environmental exposure on the pouch cell configuration may present potential challenges. We report here on the environmental storage characteristic (dry air, high humidity, and electrolyte contact) influences on the mechanical properties of Li-ion battery pouch films.