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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShinji Tsurutani, Seiichi Mizutani, Hideaki Yoshio, Kenjin Masumoto, Hideyuki Kobayashi
Estimating the term…
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.
A closure assembly for sealed batteries characterized in that a pressure receiving sheet (9) that consists of a resin sheet or a metal foil and is arranged in the closure assembly has a pressure receiving portion (P) defined in one part of the pressure receiving sheet (9), and the periphery of said pressure receiving portion (P) is restricted by other elements constituting the closure assembly that are positioned above and below the pressure receiving sheet (9), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the pressure receiving sheet (9) expands and eventually ruptures for releasing gas within the battery to the outside.
A closure assembly for sealed batteries characterized by having an insulating gasket (5b), and a metal plate (8) having a hole (81), an insulating resin sheet (9), and a metal cap (1b) serving as an external electrode terminal of cathode or anode, said metal plate, insulating resin sheet, and metal cap being laid over one another within said insulating gasket (5b), said metal plate (8) and metal cap (1b) being electrically connected through a punched hole (92) provided in the insulating resin sheet (9), wherein the insulating resin sheet (9) has a pressure receiving portion (P) defined in one part of the insulating resin sheet conforming in position to the hole (81) of the metal plate (8), and the periphery of said pressure receiving portion (P) is restricted by the metal cap (1b) and metal plate (8), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the insulating resin sheet (9) expands and eventually ruptures for releasing gas within the battery to the outside.
A closure assembly for sealed batteries characterized by having an insulating gasket (5b), and a metal plate (8) having a hole (81), an insulating resin sheet (9), a metal guide plate (3) having a hole (31) that is positioned in register with the hole (81) of the metal plate, and a metal cap (1b) serving as an external electrode terminal of cathode or anode, said metal plate, insulating resin sheet, metal guide plate, and metal cap being laid over one another within the insulating gasket (5b), said metal plate (8) and metal guide plate (3) being electrically connected through a punched hole (92) provided in the insulating resin sheet (9), wherein the insulating resin sheet (9) has a pressure receiving portion (P) defined in one part of the insulating resin sheet conforming in position to the hole (81) of the metal plate (8), and the periphery of said pressure receiving portion (P) is restricted by the metal plate (8) and metal guide plate (3), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the insulating resin sheet (9) expands and eventually ruptures for releasing gas within the battery to the outside.
A closure assembly for sealed batteries characterized in that an insulating resin gasket (5c) in the closure assembly is shaped in a dish-like form having a bottom and is provided with a thin part (59) in the bottom (52) thereof, said thin part (59) being defined to be a pressure receiving portion (P), and the periphery of said pressure receiving portion (P) of the insulating resin gasket (5c) is restricted by other elements constituting the closure assembly that are positioned above the periphery of the pressure receiving portion (P), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the insulating resin gasket (5c) expands and eventually ruptures for releasing gas within the battery to the outside.
A closure assembly for sealed batteries characterized by having an insulating resin sheet (9) and a metal thin sheet (6b) positioned above the insulating resin sheet and provided with a rupture portion (69), said insulating resin sheet and metal thin sheet being laid over one another within the closure assembly, wherein the insulating resin sheet (9) has a pressure receiving portion (P) defined in one part of the insulating resin sheet (9), and the insulating resin sheet (9) and metal thin sheet (6b) stacked on the insulating resin sheet are restricted at a position surrounding the pressure receiving portion (P) by other elements constituting the closure assembly that are positioned above and below the insulating resin sheet and metal thin sheet, said rupture portion (69) of the metal thin sheet (6b) being positioned above said pressure receiving portion (P), and an external electrode terminal (1b) of the battery is electrically connected to an internal electrode of the battery through the rupture portion (69) of the metal thin sheet (6b), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the insulating resin sheet (9) expands, whereby the rupture portion (69) of the metal thin sheet (6b) ruptures for breaking the electrical connection between the external electrode terminal (1b) and internal electrode of the battery.
A closure assembly for sealed batteries characterized by having an insulating gasket (5b), and a metal plate (8) having a hole (81), an insulating resin sheet (9), a metal thin sheet (6b) having a narrow part (69), an insulating sheet (4) having an air hole (41) that is positioned in register with the hole (81) of the metal plate (8), a metal guide plate (3) having a hole (31) that is positioned in register with the hole (81) of the metal plate and the air hole (41) of the insulating sheet, and a metal cap (1b) serving as an external electrode terminal of cathode or anode, said metal plate, insulating resin sheet, metal thin sheet, insulating sheet, metal guide plate, and metal cap being laid over one another within the insulating gasket (5b), said metal plate (8) and metal guide plate (3) being electrically connected by the metal thin sheet (6b) through respective punched holes (92, 42) provided in the insulating resin sheet (9) and insulating sheet (4), wherein the insulating resin sheet (9) has a pressure receiving portion (P) defined in one part of the insulating resin sheet conforming in position to the hole (81) of the metal plate (8), and the insulating resin sheet (9) and metal thin sheet (6b) stacked on the insulating resin sheet are restricted at a position surrounding the pressure receiving portion (P) by the metal plate (8), insulating sheet (4), and metal guide plate (3), said narrow part (69) of the metal thin sheet (6b) being positioned above said pressure receiving portion (P), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the insulating resin sheet (9) expands, whereby the narrow part (69) of the metal thin sheet (6b) ruptures for breaking the electrical connection between the metal plate (8) and metal guide plate (3).
A closure assembly for sealed batteries characterized by having an insulating gasket (5b), and a metal plate (8) having a hole (81), an insulating resin sheet (9), a metal thin sheet (6b) having a narrow part (69), an insulating guide plate (2) having an air hole (21) that is positioned in register with the hole (81) of the metal plate (8), and a metal cap (1b) serving as an external electrode terminal of cathode or anode, said metal plate, insulating resin sheet, metal thin sheet, insulating guide plate, and metal cap being laid over one another within the insulating gasket (5b), said metal plate (8) and metal cap (1b) being electrically connected by the metal thin sheet (6b) through respective punched holes (92, 22) provided in the insulating resin sheet (9) and insulating guide plate (2), wherein the insulating resin sheet (9) has a pressure receiving portion (P) defined in one part of the insulating resin sheet conforming in position to the hole (81) of the metal plate (8), and the insulating resin sheet (9) and metal thin sheet (6b) stacked on the insulating resin sheet are restricted at a position surrounding the pressure receiving portion (P) by the metal plate (8) and insulating guide plate (2), said narrow part (69) of the metal thin sheet (6b) being positioned above said pressure receiving portion (P), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the insulating resin sheet (9) expands, whereby the narrow part (69) of the metal thin sheet (6b) ruptures for breaking the electrical connection between the metal plate (8) and metal cap (1b).
A closure assembly for sealed batteries characterized by having an insulating resin gasket (5a) shaped in a dish-like form having a bottom and provided with a thin part (59) in the bottom (52) thereof, said thin part (59) being defined to be a pressure receiving portion (P), and a metal thin sheet (6a) having a rupture portion (69) stacked upon the upper surface of the bottom of the insulating resin gasket (5a), wherein the metal thin sheet (6a) is restricted at a position surrounding the pressure receiving portion (P) by the insulating resin gasket (5a) and other elements constituting the closure assembly that are positioned above the metal thin sheet, said rupture portion (69) of the metal thin sheet (6a) being positioned above said pressure receiving portion (P), and an external electrode terminal (1a) of the battery is electrically connected to an internal electrode of the battery through the rupture portion (69) of the metal thin sheet (6a), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) of the insulating resin sheet (9) expands, whereby the rupture portion (69) of the metal thin sheet (6a) ruptures for breaking the electrical connection between the external electrode terminal (1a) and internal electrode of the battery.
A closure assembly for sealed batteries characterized by having an insulating resin gasket (5c) shaped in a dish-like form and provided with a thin part (53) in a bottom (52) thereof, and a metal thin sheet (6a) having a narrow part (69), an insulating sheet (4) having an air hole (41) that is positioned in register with said thin part (53) of the insulating resin gasket, a metal guide plate (3) having a hole (31) that is positioned in register with said air hole (41) of the insulating sheet, and a metal cap (1b) serving as an external electrode terminal of a cathode or anode, said metal thin sheet, insulating sheet, metal guide plate, and metal cap being laid upon one another within said insulating resin gasket (5c), said metal thin sheet (6a) and metal guide plate (3) being electrically connected through a punched hole (42) provided in the insulating sheet (4), and said metal thin sheet (6a) being fixed to the insulating resin gasket (5c) by a contact terminal (75) that is electrically connected to an electrode within the battery, wherein the thin part in the bottom (52) of the insulating resin gasket (5c) is defined to be a pressure receiving portion (P), and the metal thin sheet (6a) is restricted by the insulating resin gasket (5c), insulating sheet (4), and metal guide plate (3) at a position surrounding the pressure receiving portion (P), said narrow part (69) of the metal thin sheet (6a) being positioned above said pressure receiving portion (P), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) expands, whereby the narrow part (69) of the metal thin sheet (6a) ruptures for breaking the electrical connection between the metal guide plate (3) and contact terminal (75) that is electrically connected to the internal electrode of the battery.
A closure assembly for sealed batteries characterized by having an insulating resin gasket (5a) shaped in a dish-like form and provided with a thin part (53) in a bottom (52) thereof, and a metal thin sheet (6a) having a narrow part (69), an insulating guide plate (2) having an air hole (21) that is positioned in register with said thin part (53) of the insulating resin gasket, and a metal cap (1b) serving as an external electrode terminal of a cathode or anode, said metal thin sheet, insulating guide plate, and metal cap being laid upon one another within said insulating resin gasket (5a), said metal thin sheet (6a) and metal cap (1a) being electrically connected through a punched hole (22) provided in the insulating guide plate (2), and said metal thin sheet (6a) being fixed to the insulating resin gasket (5a) by a contact terminal (74) that is electrically connected to an electrode within the battery, wherein the thin part (53) in the bottom (52) of the insulating resin gasket (5a) is defined to be a pressure receiving portion (P), and the metal thin sheet (6a) is restricted by the insulating resin gasket (5a) and insulating guide plate (2) at a position surrounding the pressure receiving portion (P), said narrow part (69) of the metal thin sheet (6a) being positioned above said pressure receiving portion (P), so that, upon an abnormal increase in pressure within the battery, the pressure receiving portion (P) expands, whereby the narrow part (69) of the metal thin sheet (6a) ruptures for breaking the electrical connection between the metal cap (1a) and contact terminal (74) that is electrically connected to the internal electrode of the battery.
A closure assembly for sealed batteries characterized by having an insulating resin sheet (9) and a metal thin sheet (6b) stacked on the insulating resin sheet, the metal thin sheet being provided with a rupture portion (69), wherein the insulating resin sheet (9) has a pressure receiving portion (P) defined in one part of the insulating resin sheet, and the insulating resin sheet (9) and metal thin sheet (6b) stacked thereon are restricted at a position surrounding the pressure receiving portion (P) by other elements constituting the closure assembly that are positioned above and below the insulating resin sheet and metal thin sheet, said rupture portion (69) of the metal thin sheet (6b) being positioned above said pressure receiving portion (P), and an external electrode terminal (1b) of the battery is electrically connected to an internal electrode of the battery through the rupture portion (69) of the metal thin sheet (6b), so that, when pressure within the battery increases excessively and reaches a first predetermined limit, the pressure receiving portion (P) of the insulating resin sheet (9) expands, whereby the rupture portion (69) of the metal thin sheet (6b) ruptures for breaking the electrical connection between the external electrode terminal (1b) and internal electrode of the battery, and when the pressure within the battery further increases and reaches a second predetermined limit, the pressure receiving portion (P) bursts for releasing gas within the battery to the outside of the battery.
A closure assembly for sealed batteries characterized by having an insulating resin gasket (5a) shaped in a dish-like form having a bottom and provided with a thin part (53) in the bottom (52) thereof, said thin part (53) being defined to be a pressure receiving portion (P), and a metal thin sheet (6a) having a rupture portion (69) stacked upon the upper surface of the bottom of the insulating resin gasket, wherein the metal thin sheet (6a) is restricted at a position surrounding the pressure receiving portion (P) by the insulating resin gasket (5a) and other elements constituting the closure assembly that are positioned above the metal thin sheet, said rupture portion (69) of the metal thin sheet (6b) being positioned above said pressure receiving portion (P), and an external electrode terminal (1a) of the battery is electrically connected to an internal electrode of the battery through the rupture portion (69) of the metal thin sheet (6a), so that, when pressure within the battery increases excessively and reaches a first predetermined limit, the pressure receiving portion (P) of the insulating resin sheet (9) expands, whereby the rupture portion (69) of the metal thin sheet (6a) ruptures for breaking the electrical connection between the external electrode terminal (1a) and internal electrode of the battery, and when the pressure within the battery further increases and reaches a second predetermined limit, the pressure receiving portion (P) bursts for releasing gas within the battery to the outside of the battery.
Dependencies are inferred from the claim text.