Power storage apparatus

A power storage apparatus comprising:

• two or more series-connected sets that are arranged in a vertical direction;
• and
• an intrastage wire that connects said two or more series-connected sets in series,
• each of said two or more series-connected sets including:
• two or more module batteries that are arranged in a horizontal direction;
• and
• an intrastage wire that connects said two or more module batteries in series and extends in the horizontal direction, and
• each of said two or more module batteries including:
• a case that has an accommodation space therein and includes a container and a lid, said container having a side wall and an opening, said opening facing upward in the vertical direction, and said lid closing said opening;
• a base on which said case is placed;
• a main pole that includes a main pole feedthrough part and a main pole terminal, said main pole feedthrough part penetrating through said side wall, and said main pole terminal being disposed outside said case;
• a main pole supporter that includes an insulator, a first coupling part, and a second coupling part, said insulator insulating said first coupling part and said second coupling part from each other, said main pole supporter, which supports said main pole terminal disposed outside said case, is connected to said base, with said main pole supporter including said first coupling part, said insulator and said second coupling part, respectively stacked in that order in a vertically extending direction, and said first coupling part is coupled to said base, and said second coupling part is coupled to said main pole terminal, with said insulator interposed therebetween;
• and
• two or more cells that are housed in said accommodation space and charged and discharged via said main pole;
• wherein said two or more module batteries connected in series are spaced apart.