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:
Mar. 28, 2017
Filed:
Jan. 05, 2015
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Yukiyoshi Ueno, Toyota, JP;
Hideki Sano, Ikdea, JP;
Kaoru Inoue, Hirakata, JP;
Hideaki Fujita, Kyotanabe, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;
Abstract
A lithium-ion secondary battery () includes a wound electrode assembly () having a positive electrode current collector foil () and a negative electrode current collector foil). An edge portion () of the positive electrode current collector foil () is exposed in a spiral form at one end of a winding axis (WL). An edge portion () of the negative electrode current collector foil () is exposed in a spiral form at the other end of the winding axis (WL). The spirally exposed edge portion () of the positive electrode current collector foil () is divided and gathered into a plurality of parts divided at at least one of a plurality of gaps (S), excluding a central portion (WC) containing the winding axis (WL), provided between wound layers of the positive electrode current collector foil () stacked in a direction orthogonal to the winding axis (WL). Likewise, the spirally exposed edge portion () of the negative electrode current collector foil () is divided and gathered into a plurality of parts divided at at least one of a plurality of gaps (S), excluding the central portion (WC) containing the winding axis (WL), provided between wound layers of the negative electrode current collector foil () stacked in a direction orthogonal to the winding axis (WL).