Hitachi Maxell, Limited

Kaoru Hisatomi

Osamu Watanabe

Kazuo Ishida

Yoshiki Somatomo

Shintaro Sekido

Hiroshi Sasama

Osamu Kajii

Hiroshi Yoshida

Toshiyuki Edamoto

Akira Kishida

Tomio Kitamura

Tatsuya Takemura

Yasunori Okuzono

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

An inorganic nonaqueous electrolytic solution type cell comprising an oxyhalide which is in the liquid state at room temperature and serves as an active material for a positive electrode and as a solvent for an electrolytic solution; a negative electrode made of an alkali metal; a positive electrode made of a porous carbon molded article; and a separator which is positioned between said negative electrode and said positive electrode and comprises a nonwoven fabric of glass fibers and a microporous film having a substantially uniform micropores having curved passages, which cell suffers less decrease of closing voltage after storage and less formation of the internal short circuits due to vibration.

Inorganic nonaqueous electrolytic solution type cell

An inorganic nonaqueous electrolytic solution type cell comprising a separator which is positioned between a negative electrode and a positive electrode, a bottom insulator which is positioned between a bottom of a cell container and a positive electrode, and an electrolytic solution comprising an electrolyte and an oxyhalide which is in the liquid state at room temperature and serves as an active material for a positive electrode and a solvent for the electrolytic solution, wherein each of the separator and the bottom insulator comprises a material selected from the group consisting of a microporous film of an ethylene-tetrafluoroethylene copolymer and a composite sheet of a microporous film of an ethylene-tetrafluoroethylene copolymer and a nonwoven glass fabric.

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.

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Takatsuki, Japan

Kaoru Hisatomi