POWER SOURCE DEVICE AND ELECTRIC VEHICLE EQUIPPED WITH POWER SOURCE DEVICE, ELECTRICITY STORAGE DEVICE AND METHOD FOR MANUFACTURING POWER SOURCE DEVICE

摘要

The purpose of the present invention is to avoid damages to a resin made bus bar holder during welding. A power source device comprises: a plurality of battery cells (1) equipped with a pair of electrode terminals (13); a conductive bus bar (14) for connecting the electrode terminals (13) of the adjacent battery cells (1); and an insulating bus bar holder (8) which is fixed on the upper surface of a cell laminate in which the plurality of battery cells (1) is laminated while positioning the bus bar (14). The bus bar (14) is fixed to the electrode terminals (13) by laser welding so that the bus bar holder (8) is interposed between the bus bar and the upper surface of the cell laminate. The bus bar holder (8) has a holder projection for positioning the bus bar (14) in a position that allows the bus bar to be fixed to the electrode terminals (13). The holder projection is formed so that the height thereof is lower than a height forming an angle at which the metal particles generated by laser welding fly from the position where the bus bar (14) is welded with the laser.