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. 12, 2016
Filed:
Sep. 22, 2010
Koji Takahata, Toyota, JP;
Toshihiko Mitsuhashi, Toyota, JP;
Naoyuki Wada, Osaka, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
A main object of the present invention to provide a nonaqueous electrolyte secondary battery having high durability towards charge and discharge cycles, by preventing buckling of a wound electrode body. The secondary battery provided by the present invention comprises: a nonaqueous electrolyte; and a wound electrode bodyconfigured by superposing on each other, and winding a positive electrode sheethaving a positive electrode collector formed to a sheet shape and a positive electrode active material layer formed on that collector, a, negative electrode sheethaving a negative electrode collector formed to a sheet shape and a negative electrode active material layer formed on that collector, and a separatorformed to a sheet shape. The negative electrode active material contained in the negative electrode active material layer is oriented in a predetermined direction. The positive electrode sheet, negative electrode sheetand separator sheetall have a tensile elongation at break of 2% or higher.