Abstract: A power storage device according to the present disclosure includes: an electrode body; and an outer covering can that houses the electrode body. The outer covering can includes a bottom part that includes an exhaust valve. The exhaust valve includes: a plurality of first grooves that are curved; a first valve part that is a region enclosed by a loop-shaped groove formed by the plurality of first grooves intersecting with one another; at least one second groove that is curved and extends outward from the first valve part; and a second valve part adjacent to the first value part, and surrounded by one of the plurality of first grooves and the at least one second groove. The plurality of first grooves include a plurality of intersection points in which adjacent ones of the plurality of first grooves intersect with each other. The plurality of intersection points include a first intersection point and a second intersection point that is adjacent to the first intersection point.

Abstract: A sealing plate of the present disclosure includes a flange part in an annular shape provided on an outer peripheral edge, a raised part in an annular shape located nearer to a center than the flange part and being thicker than the flange part, a fragile part located nearer to the center than the raised part and being thinnest in the sealing plate, a relay part in an annular shape located nearer to the center than the fragile part, and a middle part located nearer to the center than the relay part and including a center part of the sealing plate, wherein in the thickness direction of the sealing plate, the fragile part is apart from the flange part in the first direction, and the relay part protrudes toward a second direction that is opposite to the first direction in the thickness direction.