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:
Dec. 22, 2015
Filed:
Sep. 01, 2011
Tomoyoshi Ueki, Toyota, JP;
Yukihiro Okada, Shijyonawate, JP;
Tomoyoshi Ueki, Toyota, JP;
Yukihiro Okada, Shijyonawate, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
The nonaqueous electrolyte secondary batteryaccording to the present invention is provided with a wound electrode assembly in which a positive electrode sheet and a negative electrode sheet are wound, with a porous separator sheetinterposed therebetween. A filler layercomprising an inorganic filler and a binder is formed on one side of the separator sheet. The filler layeris continuously provided from the winding start endA to the winding finish endB of the separator sheetin the winding direction of this sheet. The separator sheethas low porosity regionsA,B, which have a lower porosity than a locationoutside these regions, in regions having prescribed width W, Wfrom the winding start endA and/or the winding finish endB of the sheet toward the center of the sheet.