| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device in which discharge of high temperature gas to the outside of a case can be suppressed.SOLUTION: A secondary battery 10 includes an electrode assembly 14 in which electrodes are laminated with a separator interposed therebetween, a case 11 housing the electrode assembly 14, and a pressure release valve 18. The secondary battery 10 includes an insulation sheet 50 for insulating the electrode assembly 14 and the case 11. A part of an upper surface 14a including a minimum interval region P, where the interval of the pressure release valve 18 and the electrode assembly 14 is minimum, and both lamination planes 14b, 14c are covered with the insulation sheet 50, but both side planes 14e, 14f of the electrode assembly 14 are not covered with the insulation sheet 50 but exposed. |
