| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device capable of preventing an insulation cover sandwiched between an inner surface of a lid and a sealing surface of a base part from being damaged while sealing an insertion hole by a seal member.SOLUTION: A secondary battery 10 is located between the peripheral surface of an electrode pole 44 and the inner peripheral surface 56a of an O-ring 56 and has a stepped part T extending from the peripheral surface of the electrode pole 44 to the outside of the electrode pole 44 in a radial direction. A width F of a lid side insulation plate 51 in the axial direction of the electrode pole 44 is longer than a distance H from a sealing surface 43a to an end surface Tb of the stepped part in the axial direction of the electrode pole 44. The secondary battery 10 has a gap S between an inner surface 14a of a lid 14 and the end surface Tb of the stepped part in the axial direction of the electrode pole 44. |
