Electric storage device and method for producing the same
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United States of America Patent
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Oct 25, 2016
Grant Date -
Jul 30, 2015
app pub date -
Aug 29, 2013
filing date -
Aug 29, 2012
priority date (Note) -
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Abstract
An electricity storage device including at least one electrode having one metal tab lead and plural electrode plates. The electrode plate includes a metal foil, an undercoat layer formed on one surface or both surfaces of the metal foil, and an active material layer formed on a surface of the undercoat layer. The undercoat layer includes a carbon material and the undercoat layer has a coating weight per unit area of one surface of 0.01 to 3 g/m2. A sum total thickness of the metal foils in the electrode plates is 0.2 to 2 mm. The electrode plates are welded to each other in a portion where the undercoat layer is formed and no active material layer is formed. Further, at least one of the electrode plates is welded to the metal tab lead in a portion where the undercoat layer is formed and no active material layer is formed.
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