Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yukihiro Gotanda

Shinichi Kawaguchi

Shinichiro Tahara

Touta Mizuta

Daisuke Sumimoto

Disclosed is a flat-shaped battery including: a power generation element including a positive electrode, a negative electrode, a separator, and an electrolyte; a cylindrical case formed of a conductor, housing the power generation element, and having a circular bottom and a circular opening; a sealing plate formed of a conductor and closing the opening; an insulating member interposed between the case and the sealing plate; and a plate-shaped current collector disposed between the case and the positive electrode. The current collector is welded to the case and is in contact with the positive electrode. A welding point where the current collector is welded to the bottom is set so as to allow contact between the positive electrode and a center portion of the current collector to be maintained when the case is deformed such that a center portion of the bottom is displaced outward of the case.

Flat-shaped battery

A non-aqueous electrolyte primary battery including: a positive electrode including a fluorinated carbon; a negative electrode including a lithium metal; a non-aqueous electrolyte; and a separator, wherein the non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, the non-aqueous solvent including &#x3b3;-butyrolactone, and the separator includes a microporous membrane onto which a phosphoric acid ester is provided, the phosphoric acid ester being represented by the formula (1): where Ris an alkyl group, Rand Rare each independently an alkylene group, and n is an integer.

Growing community of inventors

Osaka, Japan

Yukihiro Gotanda