| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power storage device in which moisture does not adhere to the gas permeation part of a gas vent valve to inhibit the gas permeation function, and thereby a high life can be achieved while maintaining excellent power storage characteristics.SOLUTION: A power storage device includes a sealing body for sealing an outer case housing a power storage element, and the sealing body includes a gas vent mechanism. The gas vent mechanism consists of a protrusion formed on the power storage element side of the sealing body, a through hole having an opening in the protrusion and penetrating the sealing body, and a gas vent valve. The gas vent valve has a bottomed cylindrical shape having a cylindrical sidewall and a bottom. The sidewall and bottom of the gas vent valve cover the protrusion to close the opening.</p> |
