The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 2016
Filed:
Aug. 29, 2013
Showa Denko K.k., Tokyo, JP;
SHOWA DENKA K.K., Tokyo, JP;
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/m. 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.