Non-aqueous secondary battery
First Claim
1. A sealed non-aqueous secondary battery, comprising an assembly composed of a positive electrode and a negative electrode, capable of intercalating and deintercalating a light metal, and a separator, the assembly being held by a bottomed battery can with a non-aqueous electrolyte, an insulating gasket provided on an inner circumference of an opening part of the can and a sealing structure fitted to and supported by the gasket, wherein said can additionally functions as a positive electrode or negative electrode terminal cap, the opening part of the can being sealed, and wherein the sealing structure comprises an explosion-proof valve being deformable in the opposite direction to the assembly with an increase in inner pressure of the battery, a sealing structure terminal cap having formed thereon a vent hole arranged at the opposite side to the assembly and an electric current cutoff element arranged between the explosion-proof valve and the sealing structure terminal cap, the explosion-proof valve being a dish-shaped body having a flat area projected toward the assembly from the vicinity of the outer circumference thereof, having groove-shaped thin wall parts and provided with, at the central part thereof, a projection part projected toward the opposite side to the assembly, in the form of one integrated unit;
- wherein the groove-shaped thin wall parts are portions of the dish-shaped body which break to permit gas to be released.
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Accused Products
Abstract
The present invention provides a non-aqueous secondary battery having an improved charge and discharge cycle property and high discharge voltage, high energy density, high capacity and increased stability as well as an excellent high electric current atitude by using a lithium-containing transition metal oxide as a positive electrode material and at least one of the specfified composite oxides as a negative electrode material. Accordingly, the feature of the present invention consists in that the negative electrode material mainly consists of at least one member selected from the group consisting of amorphous chalcogen compounds and amorphous oxides containing at least three atoms selected from the group consisting of Group 13, 14, 15 and 2 atoms of Periodic Table.
226 Citations
15 Claims
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1. A sealed non-aqueous secondary battery, comprising an assembly composed of a positive electrode and a negative electrode, capable of intercalating and deintercalating a light metal, and a separator, the assembly being held by a bottomed battery can with a non-aqueous electrolyte, an insulating gasket provided on an inner circumference of an opening part of the can and a sealing structure fitted to and supported by the gasket, wherein said can additionally functions as a positive electrode or negative electrode terminal cap, the opening part of the can being sealed, and wherein the sealing structure comprises an explosion-proof valve being deformable in the opposite direction to the assembly with an increase in inner pressure of the battery, a sealing structure terminal cap having formed thereon a vent hole arranged at the opposite side to the assembly and an electric current cutoff element arranged between the explosion-proof valve and the sealing structure terminal cap, the explosion-proof valve being a dish-shaped body having a flat area projected toward the assembly from the vicinity of the outer circumference thereof, having groove-shaped thin wall parts and provided with, at the central part thereof, a projection part projected toward the opposite side to the assembly, in the form of one integrated unit;
- wherein the groove-shaped thin wall parts are portions of the dish-shaped body which break to permit gas to be released.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification