Panasonic Corporation

Takashi Mushiga

Yasuhiko Syoji

A battery outer labelincluding a heat-shrinkable resin film such as of polyethylene terephthalate as a base material, a printing layerand a protective layerformed on a front surface of the base material, and a vapor-deposited metal layerand an adhesive layerformed on a back surface of the base material, wherein the battery outer labelhas a water vapor permeability in the range of 14 to 30 g/m&#xb7;24 h.

Battery outer label and battery provided with the same

An opening part of a battery casing is sealed by a sealing unit into which a negative electrode terminal plate, a negative electrode current collector joined to the negative electrode terminal plate, and a gasket are integrated. The gasket includes a boss part through which the negative electrode current collector passes, an outer peripheral part in contact with the opening part of the battery casing, and an annular part arranged between the boss part and the outer peripheral part, and a part of the annular part is formed into a thin part serving as a safety valve. The negative electrode current collector has a body diameter of 1.8 mm or smaller and includes at the end part thereof a collar part. The ratio of the outer diameter of the boss part to the outer diameter of the collar part is 4.0 or smaller.

Growing community of inventors

Osaka, Japan

Takashi Mushiga