Sanyo Electric Co., Ltd.

Akira Hirakawa

Hironori Honda

Yoshitaka Shinyashiki

Yasuhisa Yamada

Takahisa Awajitani

Masahiro Hosoda

Ryuuji Kawase

Toshiaki Shiojiri

Masayuki Saito

Toshihiro Inoue

Yutaka Doi

Yoshiyuki Fujimoto

A sealed battery has an outer can having an opening and functioning as an electrode terminal, a sealing member fitted in the opening of the outer can and functioning as an electrode terminal which is different in polarity from the outer can, and a spiral-wound electrode assembly contained in the outer can. The spiral-wound electrode assembly includes a positive electrode, a negative electrode and a separator wound together spirally, in which the electrodes are separated by the separator and the outermost coil of the separator forms the outer circumferential face of the spiral-wound electrode assembly. A substrate included in the positive or negative electrode which is adjacent to the outermost coil of the separator has an exposed portion, which projects in the axial direction of the spiral-wound electrode assembly beyond the outermost coil of the separator and is in direct contact with the inner face of the outer can.

Sealed battery having an electrode substrate exposed portion extending from the electrode assembly

The present invention discloses a sintered cadmium negative electrode for use in an alkaline storage battery having a porous sintered nickel substrate and an active material containing cadmium hydroxide, the active material impregnated in the porous sintered nickel substrate, sintered cadmium negative electrode in which a groove having a depth of 0.1 to 20 &mgr;m is provided on a surface of the substrate so that a projected region and a depressed region are formed on the surface of the substrate. An alkaline storage battery employing the sintered cadmium negative electrode of the invention achieves, as well as a high capacity, an improved large current charge-discharge characteristic by increasing an oxygen gas absorbing performance.

Sintered cadmium negative electrode for alkaline storage battery and method for producing thereof

Disclosed is a rechargeable alkaline storage cell having a negative electrode, a positive electrode, and a separator disposed between the electrodes. The negative electrode has an active material layer and a conductive layer formed on the active layer, the active layer including cadmium active material, the conductive layer including polyvinylpyrrolidone as a binder and conductive powder.

Alkaline storage cell having a negative electrode comprising a cadmium

The present invention discloses an enclosed alkaline storage cell. The enclosed alkaline storage cell comprising a negative electrode made of materials including a main active material of cadmium oxide, a positive electrode, and a separator impregnated with an alkaline electrolytic solution and interposed therebetween, characterized in that the negative electrode has a product produced by cross linking reaction between high polymers having hydroxyl group and at least one of boric acid and boric acid salt inside and/or on the surface thereof.

Enclosed alkaline storage cell

Growing community of inventors

Hyogo, Japan

Akira Hirakawa