Hitachi Maxell, Limited

Hitachi, Ltd.

Yoshio Uetani

Seiichi Matsushima

Kenichi Yokoyama

Osamu Ishida

Kozo Kajita

Kazuo Ishida

Akio Shimizu

Yasuyoshi Taniguchi

Toshiaki Masuhara

Osamu Minato

Tetsuichi Kudo

Katsuki Miyauchi

Osamu Watanabe

Kenichi Sawada

Kiyoshi Sato

Tomotaka Ozeki

Hiroshi Ishiuchi

Shigeru Ikenari

Hirokazu Yoshikawa

Kenya Kazehara

Tadashi Goryo

Sonae Kirihara

Satoru Kuwano

Osamu Yumimoto

Tugiyasu Iwamaru

Hisashi Urushiwara

An alkaline cell comprising a positive electrode can for accommodating positive active materials formed from stainless steel containing more than 23% chrome by weight for preventing the positive electrode can from being damaged in gastric juice. The stainless steel may be coated with nickel prevent the release of Cr.sup.6+ ions into electrolyte of the cell.

Alkaline cell

In a non-aqueous electrochemical battery, there are formed a plurality of grooves with thinned bottom portion on the bottom of the battery container. The grooves are intersected at least at one point and the bottom of the grooves are made flat so that the explosion-proof arrangement is operable for a desired inner pressure of the battery.

Non aqueous electrochemical battery with explosion proof arrangement and

A nonvolatile memory in which at least one power supply element is carried with an integrated circuit chip containing the memory and connected to power supply terminals of the integrated circuit chip having a memory cell array in which a plurality of memory elements or memory circuits are arrayed.

Semiconductor integrated circuit

A cell comprising a positive can and a negative collector fitted in the opening of the positive can, a gasket being set in the space between the positive can and the negative collector to prevent the leakage of liquid material from the cell, characterized in that the gasket is made of a synthetic resin composition comprising glass beads. The cell is much improved in its leak-proof properties.

Cell with gasket comprising glass beads

A leak-proof cell comprising a positive can and a negative collector fitted in the opening of the positive can, a gasket made of a synthetic resin being set in the space between the positive can and the negative collector to prevent the leakage of any liquid material in the cell, characterized in that the degree of crystallinity of the gasket set in the cell is at least 10% higher than that of the gasket immediately after molding.

Leak proof cells provided with a synthetic resin gasket having an

A silver oxide cell which comprises a positive electrode comprising a shaped body of silver oxide as a main positive active material, a negative electrode and an alkaline electrolyte, characterized in that the shaped body is a molded product of a composition comprising particles of silver oxide and particles of manganese dioxide, both particles having a certain particle size distribution, so that a detectable voltage difference is produced prior to complete consumption of the discharge capacity of the cell, whereby the termination of the discharge capacity of the cell can be anticipated.

Silver oxide cell and its manufacture

A leak-proof alkaline cell comprising a positive can, a negative cap having a turned-up portion, said cap being fitted at the open end of the positive can and a gasket provided between the positive can and the negative cap, the rim of the positive can being crimped inwardly so as to press the gasket to the negative cap, the negative cap being made of a metal plate laminated with a copper layer which is adapted to be contacted with a negative electrode active material mix and the copper layer also extending to the outer surface of the negative cap facing the gasket, characterized in that the copper layer is eliminated at the ultimate terminal edge of the turned-up portion.

Leak-proof alkaline cell and its production

A leak-proof alkaline cell comprising a positive can and a negative electrode collector kept at the opening end of the positive can with intervention of a gasket so as to make the inside of the cell liquid-tight, characterized in that the gasket is made of an alkali resistant, elastic material and has a moisture content of not more than 0.3% by weight.

Leak-proof alkaline cell and its manufacture

A leak-proof alkaline cell comprising a negative electrode collector and a gasket, characterized in that the negative electrode collector is coated with a film comprising a triazole compound at least at the part faced to the gasket.

A silver(II) oxide cell which comprises a positive electrode comprising a shaped body of silver(II) oxide as a positive active material, a negative electrode comprising zinc as a negative active material and an alkaline electrolyte, characterized in that the shaped body is a molding product of a composition comprising particles of which each particle comprises a core part of silver(II) oxide and a surface part of silver(I) oxide integrally and continuously provided around the core part, the weight ratio of the silver(II) oxide and the silver(I) oxide being from about 70 : 30 to 90 : 10. Such silver(II) oxide cell has large discharge capacity and shows a flat and even discharge characteristics without any substantial deterioration in performances on storage.

Growing community of inventors

Ibaraki, Japan

Yoshio Uetani