POWER-SUPPLY DEVICE, VEHICLE USING SAME, BATTERY CELL, AND BATTERY-CELL MANUFACTURING METHOD

摘要

A power-supply device provided with a fastening means for fastening together a plurality of battery cells (1) stacked with separators (2) interposed therebetween. Each battery cell (1) is provided with: a rectangular outer casing (12) comprising a top surface (24), a bottom surface (23), a pair of principal surfaces (21), and a pair of side surfaces (22); a tubular insulating film sheath (20) that covers the principal surfaces (21) and side surfaces (22) of the outer casing (12); and an insulating insulation layer (30) that covers the bottom surface (23) of the outer casing (12). Said insulation layer (30) is obtained by coating the outer casing so as to tightly cover the entire bottom surface (23) of the outer casing (12), stretch from said bottom surface (23) to the principal surfaces (21) and side surfaces (22), and overlap at least part of the bottom edge of the film sheath. With the respective bottom surfaces (23) of the plurality of battery cells (1) in roughly the same plane, the fastening means can fasten said battery cells together in a stack.