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:
Aug. 20, 2024
Filed:
Aug. 12, 2021
Kabushiki Kaisha Toshiba, Tokyo, JP;
Asuna Hagiwara, Kashiwazaki, JP;
Masanori Tanaka, Kashiwazaki, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
According to one embodiment, provided is an electrode group including a stack that includes a positive electrode and a negative electrode. A first width of the positive electrode active material-containing layer of the positive electrode in a first direction is smaller than a second width of the negative electrode active material-containing layer of the negative electrode in the first direction. The electrode group has a wound structure where the stack is wound along the first direction. A length L corresponding to a difference between the second and first widths, a mass per unit area Mof the negative electrode active material-containing layer, and a ratio p/n of a capacity p of the positive electrode to a capacity n of the negative electrode satisfy a relationship of 40 mg/m≤(L×M)/(p/n)≤60 mg/m.