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:
May. 31, 2011
Filed:
Nov. 16, 2009
Masaharu Miyahisa, Osaka, JP;
Seiichi Kato, Osaka, JP;
Mao Yamashita, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A positive electrodeincludes a positive electrode current collector leadconnected to a core exposed partformed at a longitudinal center of a current collector core. A negative electrodeincludes a double-coated partincluding an active material layerand a porous protective filmformed on each surface of a current collector core, a core exposed part, and a single-coated partwhich is located between the double-coated partand the core exposed part, and includes the active material layerand the porous protective filmformed only on one of the surfaces of the current collector core. A plurality of groovesare formed in each surface of the double-coated part, while the groovesare not formed in the single-coated part. A negative electrode current collector leadis connected to the core exposed part. The negative electrodeis wound in such a manner that the core exposed partconstitutes a last wound end.