Power supply device and vehicle using same

A power supply device comprising:

• a plurality of secondary battery cells;
• separators having insulation property which are interposed between adjacent ones of secondary battery cells in a state where the plurality of secondary battery cells are stacked, thereby forming a battery stacked body;
• end plates disposed at both end surfaces of the battery stacked body where the secondary battery cells and the separators are alternatively stacked;
• a pair of battery fastening members which fasten the end plates to each other;
• and
• an intermediate bracket interposed at an intermediate portion at a central location of the battery stacked body,
• wherein the pair of battery fastening members have fastening member-side fixing portions for fixing the intermediate bracket at the intermediate portion in a longitudinal direction of each of the pair of battery fastening members,
• the intermediate bracket has bracket-side fixing portions which are fixed to the fastening member-side fixing portions,
• each of the bracket-side fixing portions respectively protrudes from side surfaces of the intermediate bracket that face the pair of battery fastening members in the longitudinal direction,
• the bracket-side fixing portions are open at the side surfaces of the intermediate bracket, and the intermediate bracket is made of resin.