Patent ID: 8920968

Claim:
An overlaying member which is used in a film-covered electrical device comprising an electrical device element, a stacked region, alternately stacking positive electrode plates and negative electrode plates, and a collector region collectively bonding each of the positive electrode plates and the negative electrode plates, which extend outward from the stacked region; a covering film including at least a thermally-fusible resin layer and a metal layer are stacked and which encloses the electrical device element, with the thermally-fusible resin layer disposed inside, and which seals the electrical device element and an electrolyte by thermally fusing a sealing portion at a peripheral edge; and a tab connected to the collector region and extending outward from the covering film, the overlaying member comprising: a protective region located between the electrical device element and the covering film, which covers corners of the electrical device element and corners of the tab; and a communication portion through which the electrolyte can pass, wherein the protective region comprises: a bent portion covering a whole area of the side surface of the electrical device element; and an opening portion which is on an opposite side of the bent portion.