POWER SUPPLY DEVICE AND VEHICLE INCLUDING THE SAME AND POWER STORAGE DEVICE

PROBLEM TO BE SOLVED: To arrange a plurality of battery blocks efficiently in a limited space.SOLUTION: The power supply device includes a plurality of battery blocks 10 each having a plurality of prismatic battery cells, and end plates 7 arranged on the end faces. The power supply device is further provided with a base panel 41 on which the battery blocks 10 are arranged planarly side by side, and a floor panel 40 placed on the upper surface of the battery blocks 10 and having an upper surface on which other battery blocks 10 are arranged. The end plate 7 of the battery block 10 has an upper surface fixing part 52 for fixing a floor panel 40 being arranged on the upper surface side of the end plate 7, and a lower surface fixing part 54 for fixing the base panel 41 or the floor panel 40 being arranged on the lower surface side of the end plate 7.