SEALED BATTERY AND MANUFACTURING METHOD THEREOF, VEHICLE MOUNTING THE SEALED BATTERY, AND BATTERY MOUNTING DEVICE MOUNTING THE SEALED BATTERY

摘要

A sealed battery includes 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, the peripheral edge of the lid member being welded to the battery case over the entire circumference. The battery further includes a circular groove provided in the outer surface of the battery case and around the entire periphery of the liquid inlet to face the back surface of the lid member, a peripheral portion provided over the entire periphery of a portion in the back surface of the lid member facing the liquid inlet to face the circular groove, and a protrusion partially placed around the liquid inlet between the circular groove and the peripheral portion to form a clearance between the circular groove and the peripheral portion. The space facing the inner surface in a portion melted during welding between the peripheral edge of the lid member and the battery case is continuous to the liquid inlet through a clearance formed by the protrusion between the circular groove and the peripheral portion.