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:
Apr. 19, 2011
Filed:
Mar. 23, 2005
Hiroki Muraoka, Osaka, JP;
Takeshi Fukumasa, Osaka, JP;
Hiroaki Furuta, Osaka, JP;
Hiroshi Matsuno, Osaka, JP;
Hiroki Muraoka, Osaka, JP;
Takeshi Fukumasa, Osaka, JP;
Hiroaki Furuta, Osaka, JP;
Hiroshi Matsuno, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A secondary battery having an electrode assembly in which strip-shaped positive and negative electrode plates are spirally wound with a strip-shaped separator interposed therebetween, the positive and negative electrode plates comprising a current collector and a material mixture layer carried thereon. The positive electrode plate has, in a vicinity of a first end at an initial winding side, an exposed portion of the positive electrode current collector having no positive electrode material mixture formed thereon and a positive electrode lead connected to the exposed portion. A first winding turn outwardly adjacent to a connecting portion of the positive electrode lead with the separator interposed therebetween and a second winding turn outwardly adjacent to the first winding turn with the separator interposed therebetween comprise a portion of the negative electrode plate carrying the negative electrode material mixture layer.