Battery packaging material

A method for producing a battery, the method comprising:

• a step of storing in a battery packaging material a battery element including at least a positive electrode, a negative electrode and an electrolyte, wherein
• the battery packaging material includes a laminate having at least a base material layer, a metal layer and a sealant layer laminated in this order,
• the base material layer comprises at least one of a polyester resin or a polyamide resin,
• a total thickness of the laminate is in a range of 50 to 80 μm, and
• a ratio of a sum of thicknesses of the base material layer and the metal layer to
• a total thickness of the laminate is in a range of 0.380 to 0.630.

A method of using a battery packaging material, the method comprising:

• a step of hermetically sealing a battery element including at least a positive electrode, a negative electrode and an electrolyte within the battery packaging material, wherein
• the battery packaging material includes a laminate having at least a base material layer, a metal layer and a sealant layer laminated in this order,
• the base material layer comprises at least one of a polyester resin or a polyamide resin,
• a total thickness of the laminate is in a range of 50 to 80 μm, and
• a ratio of a sum of thicknesses of the base material layer and the metal layer to a total thickness of the laminate is in a range of 0.380 to 0.630.