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. 24, 2019
Filed:
Sep. 04, 2015
Wound electrode body lithium ion battery having active electrode material layers of different widths
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Yusuke Onoda, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
Provided is a lithium ion battery including a wound electrode body, in which a negative electrode active material layerof the lithium ion battery is formed to be wider than a positive electrode active material layerand has a facing portionwhich faces the positive electrode active material layerand a non-facing portionswhich do not face the positive electrode active material layer. In a facing center regionof the facing portionexcluding regionsadjacent to the non-facing portion, plural straight measurement lines are set in a region ranging from one end portion to another end portion in the width direction. When the resistance of each measurement line is measured, in all the measurement lines, a highest resistance point is present in a length region of less than 15% from a center Cof the facing center region