| abstract |
Provided is a battery packaging material which is less prone to pinholes and cracks during molding, has excellent moldability, and further effectively suppresses curling after molding. It consists of a laminate comprising at least a base material layer, an adhesive layer, a metal layer, and a heat-fusible resin layer in this order, and tensile elasticity in one direction of the base material layer and the other direction orthogonal to the one direction The battery packaging material, in which both the rates are in the range of 400 N / 15 mm to 1000 N / 15 mm, and the absolute value of the difference in tensile elastic modulus between the one direction and the other direction of the base material layer is 150 N / 15 mm or less . |