Patent ID: 7759001

Claim:
A battery, comprising: a battery case having a protrusion or a recess on a given surface of the battery case; a circuit substrate; and a molded resin body produced by molding and curing a curable resin on the given surface of the battery case so as to engage said one of a protrusion or a recess and thereby be retained on the given surface of the battery case to form a structure directly contacting an entire exterior surface of said one of a protrusion and a recess; and said protrusion or recess including an undercut portion that extends away from the given surface and is an engaging member attached on said given surface of the battery, said undercut portion being embedded within the molded resin body so that the molded resin body forms an intermediate resin layer between the circuit substrate and the given surface of the battery case which comprises a height defining top and bottom surfaces of the intermediate resin layer, the top surface being connected with the circuit substrate and the bottom surface being connected with the given surface of the battery case, each of the top and bottom surfaces of the intermediate resin layer being so connected so as to operatively connect the circuit substrate to the given surface of the battery case.