BATTERY CELL COMPRISING BATTERY CASE HAVING SEPARATION FILM

摘要

The present invention provides a battery pack. An electrode assembly, in which at least two unit cells are laminated, is stored and sealed in a battery case with an electrolyte. The battery case comprises a laminate sheet including at least one metal layer and at least one resin layer. A separation film layer is added to the outer surface or the inside of the resin layer. The present invention can improve the stability of electrode cells.