Matsushita Electric Industrial Co., Ltd.

Kaoru Murakami

Mitsugu Okahisa

Tomohiko Arita

Hiroshi Kumano

Toshihiko Ikehata

Masaaki Kaneda

Susumu Yamanaka

Tetsuya Takeuchi

Kumano, Hiroshi

A gasket-integrated case is obtained by punching out a circular piece from a metal sheet on which a gasket resin film having a round hole is integrally laminated with an adhesive, in such a way as to have a diameter concentric with, but larger than, the round hole, and by drawing the circular piece into a bottomed cylindrical shape. Elements for electromotive force and a sealing plate are then disposed on the case, and the periphery of the sealing plate is sandwiched and sealed by the periphery of the case by crimping, with a gasket including the resin film interposed therebetween, so that a coin-shaped battery is formed. The resin film has a thickness in the range of 20 &mgr;m to 150 &mgr;m and a modulus of elasticity equal to or greater than 35 kgf/mm .

Coin-shaped battery and method for producing the same

The disclosure relates to a silver oxide primary cell which includes a casing composed of a positive electrode container and a negative electrode container to define a sealed chamber between them, a positive electrode, an insulating layer, a negative electrode, a separator member, an electrically conductive member, and an insulating gasket housed in the sealed chamber. The electrically conductive member is pressed, at its portion protruding toward peripheral edge portion of the positive electrode, against the bottom face of the positive electrode container by the insulating gasket, and is simultaneously electrically connected to the bottom face or side wall of the positive electrode container.

Silver oxide primary cell

The present invention relates to a divalent silver oxide for use in primary cells which is stable in an alkaline solution, slow in the speed of oxygen gas generation with favorable reproducibility and has X-ray diffraction peak values different from that of conventional divalent silver oxide and the method of manufacturing the divalent silver oxide of the above described type. By the employment of the divalent silver oxide according to the present invention, it is possible to produce, at low cost, batteries having high energy density per unit weight and volume, with small amount of gas generation to prevent swelling or expansion of the cells.

Divalent silver oxide for use in primary cell and manufacturing method

Growing community of inventors

Hirakata, Japan

Kaoru Murakami