Patent ID: 8227112
Filing Date: 2012-07-24
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A sealed battery comprising a battery case formed with a liquid inlet, a power generating element contained in the battery case, and a lid member closing the liquid inlet, a peripheral edge of the lid member being welded to the battery case over the entire circumference, the sealed battery comprising: a first facing portion provided in an outer surface of the battery case on an inner circumferential side than a welded portion and around the entire periphery of the liquid inlet, the first facing portion facing a back surface of the lid member; a second facing portion provided around the entire periphery of a portion in the back surface of the lid member facing the liquid inlet, the second facing portion facing the first facing portion; and a clearance forming member partially placed around the liquid inlet between the first and second facing portions to form a clearance between the first and second facing portions, the inside face of the portion melted during welding between the peripheral edge of the lid member and the battery case is linked to the liquid inlet by continuous space through the clearance formed between the first facing portion and the second facing portion by the clearance forming member.