Abstract: A sealed battery in which an opening of a battery case is sealed with any one of a sealing member via an insulating gasket, and a sealing unit in which a sealing member is crimped inside a filter via an inner gasket. The sealed battery includes a sheet-like gasket placed upon the sealing member so that the battery case is tightly sealed with any one of a combination of the insulating gasket and the sheet-like gasket, and a combination of the insulating gasket, the sheet-like gasket, and the inner gasket, by crimping the opening of the battery case inwards. This secures sufficient space for the compressing while the crimp-sealing is achieved.

Abstract: A battery pack having a battery in which a battery case and a cap of a sealing plate sealing an open end of the battery case serve as connection electrodes of opposite polarities, a terminal unit including external connection terminals respectively connected to these connection electrodes and an insulating cover integrally formed therewith, the terminal unit covering at least one end of the battery case, and a resilient member interposed between one end of the battery case and the terminal unit in a compressed state. In the manufacturing method of this battery pack, the dimension between the terminal unit and the other end of the battery case is controlled when fixing the terminal unit with the battery case. The battery pack thus has a simple and low cost configuration and yet exhibits high reliability in terms of the connection state of the external connection terminals when set in a portable electronic device.

Abstract: A circuit substrate (3) being electrically connected to a rechargeable battery (2) is arranged upon a sealing plate (23) with a gap therebetween and united with the rechargeable battery (2) by filling resin in the gap. A primary mold (11) formed by the resin is firmly retained by undercut portions formed in engaging protrusions (26). The engaging protrusions (26) may be formed by welding separate engaging members (126, 126a, 126b, 126c, 66, 68).

Abstract: A battery and a battery pack comprising a rechargeable battery (2) and a circuit substrate (3) integrated therein by a resin mold package (11) are provided. Resin is filled between the rechargeable battery (2) and the substrate (3) electrically connected thereto, so as to unite them as one battery or battery pack. The rechargeable battery (2) includes an engaging member (26) which functions as an anchor to the resin mold package (11) formed onto the battery, whereby the resin mold package (11) is firmly joined to the rechargeable battery (2). A thermo-sensitive element can be incorporated either on the circuit substrate (3) or within the space filled with resin.

Abstract: The open end of a battery case (1) that houses an electrode assembly (14) is sealed with a sealing plate (3), the top of the sealing plate (3) is closed off with an insulating plate (11), and inside a concave section formed in the sealing plate (3), a positive electrode lead (12) that extends from a positive electrode plate of the electrode assembly (14) is connected in series to a thermal fuse (8) and a PTC element (9) and then to a positive electrode terminal (+). A two fold safety function is provided so that in the case of an external short-circuit across the positive and negative electrodes, excessive current is regulated by a rapid increase in the resistance of the PTC element (9) accompanying the temperature increase, whereas if a temperature increase occurs that cannot be regulated in this manner, the thermal fuse (8) fuses, breaking the circuit.

Abstract: A battery and a battery pack comprising a rechargeable battery (2) and a circuit substrate (3) integrated therein by a resin mold package (11) are provided.

Abstract: A closure assembly for sealed batteries in which explosion-proof features are incorporated. A metal plate having a hole, an insulating resin sheet, a metal thin sheet, an insulating sheet having an air hole, a metal guide plate having a hole, and a metal cap are laid upon one another within an insulating gasket. Metal plate and metal guide plate are in contact with each other and electrically connected. Upon a build-up of pressure within the battery, the insulating resin sheet expands and ruptures, whereby a narrow part provided in the metal thin sheet positioned above the insulating resin sheet breaks, thus cutting supply of electric current.

Abstract: A protective circuit having an electronic circuit constructed on a circuit board is built into a sealing member that seals the open end of a battery case accommodating electricity generating elements. The circuit board is attached to the outer end of the sealing member. A positive terminal plate that becomes the positive terminal of the secondary battery and an S pole terminal plate that controls the operation of the electronic circuit by an external connection are provided on the outer surface of the circuit board. Thereby, a protective circuit that prevents over-discharging and overcharging is arranged inside the sealing member. A secondary battery is thereby constructed with a protective circuit without resorting to a construction of a battery pack.

Abstract: A secondary battery which may be handled in a same way as conventional single cell, if the gas pressure within battery went unusually high the gas is immediately discharged outside, and bursting of the battery is prevented.

Abstract: A closure assembly for sealed batteries in which explosion-proof features are incorporated. A metal plate (8) having a hole (81), an insulating resin sheet (9), a metal thin sheet (6b), an insulating sheet (4) having an air hole (41), a metal guide plate (3) having a hole (31), and a metal cap (1b) are laid upon one another within an insulating gasket (5b). Metal plate (8) and metal guide plate (3) are in contact with each other and electrically connected. Upon a build-up of pressure within the battery, the insulating resin sheet (9) expands and ruptures, whereby a narrow part (69) provided in the metal thin sheet (6b) positioned above the insulating resin sheet (9) breaks, thus cutting supply of electric current.

Abstract: A closure assembly for sealed batteries in which explosion-proof features are incorporated. A metal plate (8) having a hole (81), an insulating resin sheet (9), a metal thin sheet (6b), an insulating sheet (4) having an air hole (41), a metal guide plate (3) having a hole (31), and a metal cap (1b) are laid upon one another within an insulating gasket (5b). Metal plate (8) and metal guide plate (3) are in contact with each other and electrically connected. Upon a build-up of pressure within the battery, the insulating-resin sheet (9) expands and ruptures, whereby a narrow part (69) provided in the metal thin sheet (6b) positioned above the insulating resin sheet (9) breaks, thus cutting supply of electric current.

Abstract: An explosion-proof non-aqueous electrolyte battery is provided which has a current cutoff device for cutting off electrical connection within the battery with safety and certainty in the event of overcharge while remaining inoperable in normal use or in storage at an elevated temperature. A pair of an upper vent plate 1 and a lower vent plate 2 mechanically and electrically coupled with each other is provided on the sealing part of-the battery where the mechanical coupling of the pair of the upper vent plate 1 and the lower vent plate 2 is so configured as to rupture and cut off an electric current in the event the internal pressure of the battery case increases beyond a predetermined value, and the rupture pressure at which the mechanical coupling between the pair of upper vent plate 1 and the lower vent plate 2 is broken has been set to decrease as the spatial volume occupancy ratio of the battery increases.

Abstract: To enhance the safety of battery, in a thin type battery, by securely cutting off electric connection when the internal pressure of the battery is raised.An upper valve disc and a lower valve disc are disposed through an electric insulating gasket, a part of the upper valve disc is formed in a recess shape, and a tiny hole and a continuous thin wall part are formed in a part of the lower valve disc, and the bottom of the recess part of the upper valve disc and the portion enclosed by the tiny hole and thin wall part of the lower valve disc are fused, and the structure is constituted so that the strength of the lower valve disc may be greater than the strength of the upper valve disc.