Battery closing body and method for producing same

Abstract

The present invention provides a battery closing body that improves the production efficiency and also can suppress the generation of hydrogen fluoride in the inside of a battery. A battery closing body is obtained by integrating a closing member that is formed from metal and closes an opening of a battery container, a terminal member formed from metal, and a gasket member that is interposed between the closing member and the terminal member, by a sealing member, wherein the gasket member contains a first thermoplastic resin that has resistance to hydrogen fluoride; the sealing member contains a second thermoplastic resin; the closing member has a generally planar main body part and a hole part that is provided so as to penetrate the main body part in a thickness direction; the gasket member that has been molded in advance is sandwiched between an outer peripheral portion of the terminal member and the inner peripheral portion of the hole part of the closing member; and the sealing member is injection-molded in a state in which the terminal member, the gasket member and the closing member are in close contact to the sealing member without existence of a space that forms an air layer between each of the members and the sealing member. A method for producing the battery closing body is also provided.

Dependencies are inferred from the claim text.