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Cell

  • US 20060127760A1
  • Filed: 11/29/2005
  • Published: 06/15/2006
  • Est. Priority Date: 12/10/2004
  • Status: Active Grant
First Claim
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1. A cell comprising:

  • a cell element including a positive electrode having a belt-shaped metal foil and reaction layers provided on two surfaces thereof, a negative electrode having a belt-shaped metal foil and reaction layers provided on two surfaces thereof, and an electrolyte;

    a laminate film for packaging the cell element, having a sealing portion and being composed of an exterior resin layer, an interior resin layer, and a metal layer provided between the exterior resin layer and the interior resin layer, the sealing portion being thermal welded on a part of the laminate film apart from an edge portion thereof to form a thermal welded portion for sealing the cell; and

    electrode terminals electrically connected to the cell element and extending outside through the sealing portion, wherein a thickness t2 of the edge portion of the laminate film is larger than a thickness t1 of the thermal welded portion.

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