Gs Yuasa International Ltd.

Gs Yuasa Corporation

Takahiro Itagaki

Kazuya Okabe

Tomonori Kishimoto

Shuichi Izuchi

Satoshi Yokota

Takehito Matsubara

Masahiko Oshitani

A sealed battery includes a lid closing a container of a sealed battery, an upper current collecting plate, a lead connecting an upper surface to an inner surface of the lid. A welding point of the lead is outside a position corresponding to a periphery of the cap. The lead includes a cylindrical lateral wall part extending vertically, an annular frame portion extending substantially horizontally from a first end of the lateral wall part, and a plurality of supplementary leads that extends substantially horizontally from a second end part of the lateral wall part. The frame portion extends from the first end part in substantially a first direction along a radial direction of the cylindrical lateral wall part, whereas the plurality of supplementary leads extends from the second end part in substantially a second direction opposite to the first direction along the radial direction.

Sealed battery and battery stack comprising a plurality of sealed batteries

A method for manufacturing highly reliable batteries includes the steps of placing in a battery container an electrode assembly; arranging an upper current collecting plate to be electrically connected to one of the electrodes of the electrode assembly; bringing a lead previously welded to the inner surface of a lid in contact with the upper current collecting plate; and welding the points of contact between the lead and the upper current collecting plate. Also batteries are produced by the method, and a method for inspecting battery including the steps of detecting defective welds by measuring alternating-current resistance of a battery.

Method for manufacturing battery, battery manufactured by the method, and method for inspecting battery

Current collecting lead

Growing community of inventors

Kyoto, Japan

Takahiro Itagaki