Patent ID: 8178234

Claim:
A cell-to-cell connection structure comprising: a plurality of cylindrical batteries each having a battery case of closed-bottomed cylindrical shape with a bottom thereof serving as a first electrode terminal and a sealing body arranged on an open-end side of the battery case, serving as a second electrode terminal, the cylindrical batteries being axially arranged in series or radially juxtaposed so that opposite electrode terminals of each adjoining two of the cylindrical batteries are electrically and mechanically connected to each other, the structure comprising cell-to-cell connection plates each integrally having a welding part shaped to fall within a circular end of the battery case and a connecting part extending from the welding part, and wherein: the cell-to-cell connection plates are attached to the first electrode terminal and the second electrode terminal of the battery case by welding the welding parts, respectively; and the connecting parts of the respective cell-to-cell connection plates attached to each adjoining pair of cylindrical batteries are overlapped with each other and coupled to form an electrical connection.