Patent ID: 7378183

Claim:
A sealed cell using a film outer casing body comprising: a flat-shaped electrode body having a first electrode and a second electrode opposed to the first electrode via a separator, the first electrode and the second electrode and the separator wound into a flat shape, the flat shape having a first flat side surface R portion and a second flat side surface R portion; the film outer casing body for housing the flat-shaped electrode body; and an electrolyte, the sealed cell wherein: a portion of the first electrode is an outermost surface of the flat-shaped electrode body; and a first insulation member covering a lower edge and/or an upper edge of the first flat side surface R portion is provided between the outermost portion of the first electrode and a portion of the second electrode wound immediately inside the outermost portion of the first electrode, and another first insulation member covering a lower edge and/or an upper edge of the first flat side surface R portion is provided between the portion of the second electrode immediately inside the outermost portion of the first electrode and another portion of the first electrode wound immediately inside the portion of the second electrode immediately inside the outermost portion of the first electrode.