| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage element in which whether or not the cause of airtight defects is due to heating to an electrode terminal can be easily determined.SOLUTION: A power storage element 100 includes: a container 110; an electrode body 170 housed in the container 110; an electrode terminal 130; a current collector member 160 electrically connecting between the electrode terminal 130 and the electrode body 170; and an external insulation seal material 120 insulating between the container 110 and the electrode terminal 130. The electrode terminal 130 seals a portion penetrating through the container 110 by crimping the container 110 via the external insulation seal material 120 while penetrating through the container 110, and has a temperature-indicating label 180 irreversibly changing colors or deforming when the temperature at a part inside the container 110 is equal to or higher than a predetermined temperature. |
