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:
Jun. 28, 2011
Filed:
Dec. 19, 2006
Tsuyoshi Hatanaka, Wakayama, JP;
Tatsuya Hashimoto, Ishikawa, JP;
Tsuyoshi Hatanaka, Wakayama, JP;
Tatsuya Hashimoto, Ishikawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A lithium ion secondary battery which includes: a negative electrode platein which a negative electrode mixture layeris formed on each of both surfaces of a negative electrode current collectorcontaining copper as a principle component and having a sheet shape; a positive electrode platein which a positive electrode mixture layeris formed on each of both surfaces of a positive electrode current collectorcontaining aluminum as a principle component and having a sheet shape; and a separatorholding an electrolyte. The negative electrode plate, the positive electrode plateand the separatorare spirally wound or stacked. The thickness of the positive electrode current collectoris smaller than the thickness of the negative electrode current collector