CASE FOR SEALED BATTERY, SEALED BATTERY AND METHOD OF MANUFACTURING THE SEALED BATTERY, VEHICLE HAVING THE BATTERY, AND BATTERY-MOUNTED DEVICE

摘要

A case for a sealed battery comprises a battery case (11) having an opening part (21) on one side and a sealing plate (12) for closing the opening part (21) of the battery case (11). A power generating element (16) is contained in the battery case (11), and the battery case (11) is welded to the sealing plate (12) to seal the opening part (21) for forming a battery. An upper end surface (24) so welded to the sealing plate (12) as to be opposed to the sealing plate is formed at the edge side of the opening part (21) of the battery case (11). A peripheral part (31) so welded to the battery case as to be opposed to the upper end surface (24) is formed on the sealing plate (12). A groove (25) which forms the gap communicating with the inner space of the battery case (11) between the opposed surfaces of the upper end surface (24) and the peripheral part (31) when the upper end surface and the peripheral part are opposed to each other is formed in at least one of the upper end surface (24) and the peripheral part (31). The groove (25) is formed in the battery case (11) starting at the position of the inner surface of the battery case (11) to the position thereof fused during the welding in the plate thickness direction of the battery case (11).