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:
May. 01, 2018
Filed:
Mar. 29, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
Provided is a lithium ion secondary battery that enables lithium ion replenishment in a short period of time. The lithium ion secondary battery disclosed herein is provided with a wound electrode assembly in which a long sheet-shaped positive electrode and a long sheet-shaped negative electrode are wound such that the negative electrode is positioned on the outer side of the positive electrode; a third electrode that is disposed outside the wound electrode assembly and that has an Li supply source capable of supplying lithium ion; and a porous insulating film that is disposed between the wound electrode assembly and the third electrode and that is formed from a material usable as a separator in a battery. In this lithium ion secondary battery, the third electrode has a portion facing, across the insulating film, an outer surface of the negative electrode that constitutes the outermost circumference of the negative electrode of the wound electrode assembly, and has a portion facing, across the insulating film, a wound electrode assembly open end face that communicates with the interior of the wound electrode assembly and is an end face of the wound electrode assembly along the direction of the winding axis.