Gs Yuasa International Ltd.

Gs Yuasa Corporation

Shuichi Izuchi

Kazuya Okabe

Tomonori Kishimoto

Satoshi Yokota

Takahiro Itagaki

Takehito Matsubara

Kouichi Sakamoto

Hiroaki Mori

Toshinori Bandou

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

In a method for preparing a hydrogen absorbing electrode, a hydrogen absorbing alloy which contains a rare earth element as an alloy constituent and a transition metal element is immersed in an aqueous alkaline solution so that the saturation mass susceptibility is 1.0 to 6.5 emu/g of the hydrogen absorbing alloy. The hydrogen absorbing alloy is mixed through the immersing step with an oxide or hydroxide of a rare earth element wherein the oxide or hydroxide has as a main component at least one element selected from the group consisting of Dy, Ho, Er, Tm, Yb, and Lu. Then, a mixture of the hydrogen absorbing alloy and the oxide or hydroxide of the rare earth element is applied to form a desired shape.

Method for preparing hydrogen absorbing electrode and nickel metal-hydride battery

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

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Kyoto, Japan

Shuichi Izuchi