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:
Jan. 29, 2019
Filed:
Apr. 11, 2013
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
[Task] To accurately estimate a distribution of concentration of lithium in an active material. [Means for Solution] A battery system has a lithium-ion secondary battery () and a controller (). The lithium-ion secondary battery () employs a two-phase coexistence type positive electrode active material (). The controller () calculates a distribution of concentration of lithium in an active material () of the lithium-ion secondary battery, through the use of a diffusion equation in which a boundary condition is set. The controller corrects a diffusion coefficient that is used in the diffusion equation, in accordance with history data indicating a charge/discharge state of the lithium-ion secondary battery to the present time.