POWER STORAGE DEVICE

To provide a power storage device capable of suppressing damage to a power storage element.SOLUTION: A power storage device 10 includes a power storage element 300, and an end plate 400 arranged side by side with the power storage element 300 in the first direction, and an exterior body 11 in which the power storage element 300 and the end plate 400 are accommodated, and the exterior body 11 includes a first wall portion 110 at a position sandwiching the end plate 400 with the power storage element 300, and the first wall portion 110 has one side in a second direction that intersects the first direction, which has a larger distance with the power storage element 300 in the first direction than the other side, the end plate 400 has a second portion 420 having a larger width in the first direction on one side in the second direction than a first portion 410 on the other side in the second direction. The second portion 420 is an integrally formed portion, and has a shape in which a plurality of portions on one side of the end plate 400 in the second direction are overlapped in the first direction, or a shape in which a portion of the end plate 400 on one side in the second direction is bent in the first direction.SELECTED DRAWING: Figure 4 【課題】蓄電素子の損傷を抑制できる蓄電装置を提供する。【解決手段】蓄電素子３００と、第一方向において蓄電素子３００と並んで配置されるエンドプレート４００と、蓄電素子３００及びエンドプレート４００が収容される外装体１１と、を備える蓄電装置１０であって、外装体１１は、蓄電素子３００とでエンドプレート４００を挟む位置に第一壁部１１０を有し、第一壁部１１０は、第一方向と交差する第二方向の一方側の方が他方側よりも、第一方向における蓄電素子３００との距離が大きく、エンドプレート４００は、第二方向の一方側に、第二方向の他方側の第一部４１０よりも第一方向における幅が大きい第二部４２０を有し、第二部４２０は、一体的に形成された部位であり、かつ、エンドプレート４００の第二方向の一方側の部位が第一方向に複数重なった形状、または、エンドプレート４００の第二方向の一方側の部位が第一方向に曲がった形状を有する。【選択図】図４