Patent ID: 7666549

Claim:
A method for producing an enclosed nickel-metal hydride storage battery including a battery case and a group of electrodes arranged in the battery case, the battery case including a resin case on the outer surface of which a multilayered film is formed, comprising: integrating the multilayered film with the resin case by insert molding after the multilayered film is formed by roll molding or injection molding, wherein the multilayered film includes an inner resin layer, a metal layer, and a surface resin layer in the indicated order from the resin case side, the inner resin layer contains the same resin as a resin constituting the resin case, the resin case has a wall thickness of 1 mm to 3 mm, the inner resin layer has a thickness of 20 μm to 70 μm, the metal layer has a thickness of 5 μm to 100 μm, and the surface resin layer has a thickness of 20 μm to 70 μm.