POWER SOURCE DEVICE, ELECTRIC VEHICLE COMPRISING POWER SOURCE DEVICE, ACCUMULATOR DEVICE, AND METHOD FOR FABRICATION OF POWER SOURCE DEVICE

摘要

An objective of the present invention is to allow welding of a bus bar in a short time without using a welding ring. A power source device (100) comprises a plurality of battery cells (1) further comprising electrode parts (20), and bus bars (30) for connecting the electrode parts (20) of the battery cells (1). The bus bar (30) forms, in at least a portion of an edge part thereof, a thin part which is thinner than another part thereof, and is welded to the electrode parts (20) of the battery cells (1) with the thin part thereof. The electrode parts (20) further comprise pedestal parts (22), and electrode terminals (21) which protrude from the pedestal parts (22), and thin parts (32) are positioned on lateral faces of the electrode terminals (21). It is thus possible to directly weld the thin parts (32) to the electrode parts (20) when welding the bus bars (30), and it is also possible to obviate the usage of other materials such as welding rings, and to streamline the welding process.