| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device capable of suppressing a projection from being formed on a leading-end surface of an electrode column portion when a nut is screwed.SOLUTION: In a secondary battery 20, an electrode terminal 31 includes a tool-use depression 37 recessed from a leading-end surface 36 in a projecting direction of an electrode column portion 33 from a lid 23. The shape of the tool-use depression 37 in plan view is a shape that is other than a perfect circle, and has an engagement part engageable by a tool 48 that is inserted in the tool-use depression 37. At an opening edge of the tool-use depression 37 on the leading-end surface 36 of the electrode column portion 33, the secondary battery 20 has a deformation absorption portion 40 that is recessed from the leading-end surface 36.SELECTED DRAWING: Figure 6 |
