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:
Jul. 22, 2025
Filed:
Nov. 30, 2020
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Koshiro Yoneda, Ichinomiya, JP;
Fumihiko Ishiguro, Oobu, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A secondary battery has a flat-shaped wound electrode body and a rectangular battery case housing the wound electrode body. In the wound electrode body, in at least any one of a positive electrode current collection foil laminated part and a negative electrode current collection foil laminated part, a positive electrode current collection foil exposed portion or a negative electrode current collection foil exposed portion is foil-bundled at a foil-bundling position and joined to a positive electrode current collection terminal or a negative electrode current collection terminal. At the foil-bundling position, the thickness A of the wound electrode body in the lamination direction and the shortest distance B to the foil-bundling position from the vertex of the R portion closest to the foil-bundling position among R portions of the wound electrode body satisfy, B≤(1/2) A.