Hitachi Maxell, Limited

Hitachi Maxell Energy, Ltd.

Osamu Watanabe

Yoshiki Somatomo

Kaoru Hisatomi

Osamu Kajii

Hiroshi Yoshida

Kazuaki Urano

Akira Kawakami

Masatoshi Tanaka

Yoshio Uetani

Kenichi Yokoyama

Kiyoshi Sato

Kenichi Sawada

Kazuo Ishida

Toshiyuki Edamoto

Satoru Yamaguchi

Noboru Odani

Akira Kishida

Shigeru Ikenari

Hirokazu Yoshikawa

Masakazu Oshimura

Kenya Kazehara

Tomio Kitamura

Tatsuya Takemura

Yasunori Okuzono

Osamu Okamoto

Hiroaki Hosoda

Yoshimi Matsumoto

Shinichi Fujii

Yoshizo Koori

Tugiyasu Iwamaru

Hisashi Urushiwara

A sealed prismatic battery according to the present invention comprises a laterally long cap sealing an opening of an upper surface of a battery can and a safety vent placed on the cap and having a thin-walled valve body which opens in an abnormal rise of a battery internal pressure. The safety vent has an oval-shaped circumferential groove formed inside an oval-shaped coining section provided on an outer surface of the cap and on one end side in a lateral direction of the cap and a thin-walled valve body surrounded thereby, and the oval-shaped circumferential groove is composed of lateral side sections parallel to the lateral direction of the cap and circular arc sections connecting these lateral side sections, with one lateral side section, other lateral side section, and the thin-walled valve body of the safety vent respectively having a thickness increased in this order.

Sealed prismatic battery

A lidthat closes the upper surface of the opening of a closed-bottom prismatic tubular battery can, an electrode bodyaccommodated in the battery can, a negative terminalpenetratively fastened to the lid, an insulating plateplaced on the lower surface side of the lid, a lead plateplaced on the lower surface side of the insulating plate, and a negative electrode current collector leadled upwardly of the electrode bodyare included. The upper end portion of the current collector leadis welded to the lower surface of the lead plateand bent in a position located rather closer to the front wall of the battery can. The insulating platehas a lid side insulating portionheld between the lidand the lead plateand a front sidewallthat extends downwardly from the front end side of the lid side insulating portion. In a free state before the battery is assembled, the lid side insulating portionand the sidewallof the insulating plateextend roughly straightly.

A battery canis composed of a can bodyhaving a concave portionfor accommodating an electrode body, and a metal coverfor sealing an opening end of the concave portionof the can body. The can bodyis formed in a plate shape by subjecting a metal plate to shallow drawing. A flangeis provided at a peripheral edge portion of the opening end of the can body, which is bonded to be integrated with the metal coverto keep an air-tight and liquid-tight state in the concave portion

Battery comprising a flange formed at a peripheral edge and a protection circuit attached to the flange

A hermetically sealed liquid active material cell having an oxyhalide compound which is in a liquid state at room temperature as a positive active material, a negative electrode which contains at least one alkali metal, a cell container which has a thin-wall part in its bottom for explosion-proofing, and a hermetic seal which closes an opening of the cell container, in which the cell further has a resinous ring on an inner surface of the bottom of the cell container, which cell has improved explosion-proof performance.

Hermetically sealed cell comprising liquid active material

Short circuit between a lead terminal for a negative electrode and a positive electrode can of a coin type cell can be prevented by providing a protuberance for preventing short circuit on a part of the lead terminal for the negative electrode which part is to be positioned over an area where the lead terminal for the negative electrode and the positive electrode can are present adjacent to each other.

Coin type cell with lead terminals

In a coil type lithium battery comprising a coil electrode body formed by winding a strip like negative electrode plate of lithium or lithium alloy and strip like positive electrode about a separator, the entire outer cylindrical surface of the coil of the electrode body is covered with an insulating film to prevent internal short circuiting of the battery.

Coiled lithium battery

In a cylindrical organic electrolyte battery with a PTC device, the PTC device is attached to the bottom of the battery case through a metal plate so that the upper opening of the battery case can be tightly sealed.

Cylindrical organic electrolyte battery with a PTC device

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

An improved leak-proof alkaline cell comprising positive and negative electrode materials, a member for accommodating said positive electrode materials, a member for covering said negative electrode materials and a gasket provided between the members, characterized in that a sealant comprising asphalt and a compound selected from the group consisting of homopolymer of vinyl acetate, copolymer of vinyl acetate and polyterpene is interposed between the gasket and at least one of said members.

Leak-proof alkaline cell

The reduction of nitrogen oxides involves the passage of gases containing nitrogen oxides at higher than 500.degree. C. over a catalyst comprising cerium oxide and nickel oxide in the CeO.sub.2 /NiO molar ratio of about 0.05 : 1 to 2.5 : 1 and when desired an addition thereto of rhodium in an amount of from about 7.5 to 25 parts by weight per 100 parts by weight of the nickel oxide and cerium oxide composition and when desired an addition to said nickel oxide and cerium oxide composition of ruthenium in an amount of about 10 to 50 parts by weight or an addition to said composition containing rhodium of ruthenium in an amount of about 15 to 50 parts by weight per 100 parts by weight of the nickel oxide and cerium oxide composition. Also, when desired, an addition to said composition of one or more metal sulfides and an addition to said composition of one or more metal oxides is utilized.

Reduction catalysts and processes for reduction of nitrogen oxides

Growing community of inventors

Ibaraki, Japan

Osamu Watanabe