Patent ID: 8697269
Filing Date: 2014-04-15
Classification: H01M,Y02E

Abstract:
1. A sealed battery comprising: an electrode assembly; a rupture disk made of flexible electrically-conductive material electrically connected to the electrode assembly; and an electrically-conductive terminal plate abutting the rupture disk; an opening being formed in the terminal plate, and the rupture disk being arranged to close the opening, an abutting part of an inner periphery of the opening of the terminal plate and the rupture disk being welded at a welded position by a high energy beam, and the terminal plate being provided with a thicker portion and a thinner portion thinner than the thicker portion of the terminal plate, wherein the electrically-conductive terminal plate is configured to break in the thinner portion at a break position away from the welded position when a gas pressure in the battery increases to a predetermined pressure or more.