POWER SUPPLY DEVICE AND ELECTRIC VEHICLE PROVIDED WITH POWER SUPPLY DEVICE

In order to prevent displacement of a bind bar and lateral displacement of battery cells with a simple structure, a power supply device has a structure in which a bind bar (4) having bent pieces (41) at both ends coupled to end plates (3) disposed at both end portions of a battery stack (2) is divided in a width direction of a side surface of the battery stack (2), the bent piece (41) of each bind bar (4) is bolted to an outer surface of one of the end plates (3), the one of the end plates (3) is provided with a stopper wall (34) that prevents rotation of a bent piece (41X) fixed with a single bolt, which is fixed to the one of the end plates (3) via one bolt, and the bent piece (41) is fitted to a stopper wall (34) to prevent the displacement of the bind bar (4).