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. 23, 2023
Filed:
Dec. 01, 2020
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Hiroki Iguchi, Nagoya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A negative electrode active material includes graphite and silicon oxide. On a rectangular coordinate system having an SOC of the battery on a horizontal axis and a dimension of the battery on a vertical axis, a charging profile of the battery includes a first stage and a second stage. When the battery is charged at a current rate equal to or higher than an inherent current rate, a first slope is less steep than a second slope. When the battery is charged at a current rate lower than the inherent current rate, the first slope is steeper than the second slope. During the initial charging, at least charging in the first stage is performed at a current rate lower than the inherent current rate. After the initial charging proceeds to the second stage, the thermal aging is performed at an SOC included in the second stage.