To stabilize gas discharge ability, to suppress generation of defective goods by stabilizing a welding process of a current collector, and to enhance production yield of a battery which is superior in a current discharge characteristic.
The closed type battery is sealed by a sealing material having an exterior container 9 that is provided with an aperture and that serves also as a terminal of one electrode, having an electrode body 18 arranged in the exterior container 9, and having a gas releasing hole in which the aperture serves also as the terminal of the other electrode, and in which the other electrode of the electrode body and the sealing material are welded via the current collector. The current collector 1 is provided with the main body part connected to the one end part of the electrode body, and a current collecting reed 17 which is extended from the main body part and welded to the sealing material 10 or to the exterior container 9. A protrusion A which has a prescribed length along the longitudinal direction of the current collecting reed 17 is installed, and the protrusion A is arranged so that it is communicated with the aperture 2 which is installed at a position that coincides with the gas releasing hole 8.
COPYRIGHT: (C)2006,JPO&NCIPI
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