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:
Aug. 12, 2014
Filed:
Nov. 24, 2010
Yuko Onishi, Otokuni-gun, JP;
Toshikazu Yoshiba, Otokuni-gun, JP;
Megumu Takai, Otokuni-gun, JP;
Hitachi Maxell, Ltd., Ibaraki-shi, JP;
Abstract
A flat nonaqueous secondary battery with improved reliability is provided. The flat nonaqueous secondary battery () includes an electrode assembly disposed in a space formed by an exterior case () and a seal case (). The electrode assembly includes a plurality of positive electrodes () and a plurality of negative electrodes () alternately stacked upon each other and a separator (). The separator () has a joint () formed by welding together at least a portion of its periphery. When the separator () and the positive electrode () are measured along a cross section in their thickness direction, the ratio A/B of the shortest distance A between the end of the joint () of the separator () facing the positive electrode () and the outer periphery of the positive electrode () sandwiched by the separator () to the thickness B of the positive electrode () is not smaller than 1.