Abstract: A film-covered battery 1 includes battery element 6 and laminate films 3 and 4 for sealing battery element 6. Laminate films 3 and 4 are realized by laminating a heat-seal resin layer and a metal foil layer and seal battery element 6 by arranging the films on either side of battery element 6 with the heat-seal resin layers disposed on the inside and then heat-sealing at sealing areas 3a and 4a on the outer peripheries of the films. The areas of the laminate films 3 and 4 other than sealing areas 3a and 4a are electron beam irradiation areas 3b and 4b that are irradiated by an electron beam. Cross-linked structures are formed in the heat-seal resin layers of electron beam irradiation areas 3b and 4b by irradiation by an electron beam.

Abstract: In a film-packed battery which stores a battery element (9) with packing films (8a, 8b) and sealed by heat-sealing heat-sealed surfaces of the packing films around the battery element, a heat-sealed portion (6) projecting toward a battery element is provided at part of a heat-sealed portion (5), and a gas releasing portion (7) is formed close to the projecting heat-sealed portion. A pressure safety valve for safely releasing a gas to the outside when the gas is generated in the battery is provided without lowering the reliability of the battery.

Abstract: A film-covered electric device has an electric device element and casing films. The casing films include a sealing area formed by thermally fusing the facing surfaces of the casing films together around the periphery of the electric device element, an electric device element receiving part encapsulating the electric device element inside the sealing area, and unfused portions formed in the shape of cove communicating with the electric device element receiving part. The casing films further include a stress concentrating portion touching the unfused portions for concentrating thereon the peeling stress of the casing films generated at the sealing area by the expansion of the electric device element receiving part, and a pressure releasing part is formed in the stress concentrating portion.

Abstract: A laminated battery has a battery element in which a plurality of positive electrode sheets, which are each composed of a positive electrode collector in which positive electrode material has been applied and in which a portion to which the positive electrode material has not been applied extends from one side, and a plurality of negative electrode sheets, which are each composed of a negative electrode collector in which a negative electrode material has been applied over an area that is greater than that of the positive electrode material and in which a portion to which the negative electrode material has not been applied extends from one side, are alternately stacked with interposed separators. On the side of the connection unit with a negative electrode lead, a portion of the negative electrode sheets that protrudes from the portions that have been applied with positive electrode material curves toward the connection unit.

Abstract: A film covered battery has a battery element, a positive and a negative lead terminal connected to the battery element, and a casing for sealing the lead terminals and the battery element together with an electrolytic solution, with portions of the lead terminals extending therefrom. The casing has a buffer in at least a portion thereof for accumulating a gas generated within the casing through deformation of the casing. The buffer is formed continuously with a region for accommodating the battery element.

Abstract: A film covered battery has a battery element, a casing for sealing the battery element, and lead terminals connected to a positive electrode and a negative electrode, respectively, of the battery element, and extending from the casing. The casing is flexible, and is comprised of two halves for sealably sandwiching the battery element on both sides in the thickness direction thereof. One of the halves of the casing, sandwiching the battery element, is formed with a recess for receiving the battery element. The lead terminals are each connected to the battery element at a position inside of both surfaces of the battery element in the thickness direction.

Abstract: A non-aqueous electrolyte battery has a laminate housing encapsulating therein a battery body including an anode, a cathode and an electrolyte. The laminate housing is made of two laminated films which are thermally fused together at the edge portions thereof. The thermally fused edge portions encapsulate therein moisture absorbent, which is separated from the battery body for effectively preventing the ingress of water.

Abstract: A battery is fabricated on the basis of at least one of the following four concepts, i.e., lead terminals passing through a package not lower than the uppermost surface of an electrolyte cell, lead terminals projecting from a package in directions opposite to each other, a film package with a crushed portion expandable for accumulating gas and sheets of gas barrier sealant for keeping the boundaries between component parts of a package sealed; the seal is hardly broken so that the battery is durable and highly reliable.