Gs Yuasa International Ltd.

Takuma Tonari

Masakazu Tsutsumi

Jun Nakamura

Shinsuke Yoshitake

Katsuhiko Okamoto

Hajime Kawamoto

Kenji Kouno

A first projecting portion is disposed between a head portion of an external terminal and a gasket body of a gasket, the first projecting portion projecting toward the gasket body from a first opposedly-facing surface which opposedly faces a case of the head portion, the first projecting portion surrounding the shaft portion, the first projecting portion having a pressing surface which directly or indirectly presses the gasket body in a projecting direction of the first projecting portion. The gasket has the second and third opposedly-facing surfaces, the second opposedly-facing surface opposedly facing the head portion, the third opposedly-facing surface opposedly facing the case. A second projecting portion is disposed in a region of at least one of the second and third opposedly-facing surfaces which correspond to the first projecting portion, the second projecting portion surrounding the shaft portion and being in a state where the second projecting portion is compressed toward the second or third opposedly-facing surface by the pressing surface.

Energy storage device, energy storage apparatus and method of manufacturing energy storage device

An electric storage device includes an electrode assembly, a case that includes a defining wall and houses the electrode assembly, a sealing member that is arranged on the defining wall, and a conductive member that is electrically connected to the electrode assembly, the conductive member being supported by the sealing member. At least a portion of the defining wall where the sealing member is arranged includes an aluminum-based metallic material. The sealing member includes a material that is softer than the material for the at least a portion of the defining wall where the sealing member is arranged. The sealing member includes polyphenylene sulfide (PPS) resin and an elastomer. The elastomer is contained in an amount of 2% to 20% by weight. The conductive member is crimped in such a manner that the sealing member is pressed against the defining wall.

Electric storage device

Provided is an electric storage device and an electric storage apparatus capable of suppressing an increase in thickness of a conductive member due to a rivet member being swaged. The present invention includes a rivet member provided with an insert part, and a conductive member provided with an insert-receiving part through which the insert part is inserted. The insert part has a higher Vickers hardness than the peripheral region of the insert-receiving part.

Electric storage device and electric storage apparatus provided with the electric storage device

Provided is an electric storage device including a first conductive member having a head bulging from an inserted part inserted through a partition wall, and a second conductive member that is formed using a metal material different from a material of the first conductive member and is fixed to the head of the first conductive member by friction stir welding.

Electric storage device, electric storage device assembly, and method for producing electric storage device

An energy storage apparatus includes energy storage devices each of which including an electrode assembly, a current collector connected to the electrode assembly, a terminal plate including a through hole, and a metal-made fastening member which fastens the terminal plate and the current collector to each other, and a bus bar physically connected to the terminal plate at a contacting surface of the bus bar and the terminal plate. The metal-made fastening member includes a body portion fixed to the current collector, a shaft portion extending from the body portion and passing through the through hole, and a swaged portion formed on the shaft portion outside the energy storage devices and fixing the terminal plate between the swaged portion and the body portion in a sandwiching manner.

Growing community of inventors

Kyoto, Japan

Takuma Tonari