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:
Dec. 05, 2023
Filed:
Feb. 23, 2022
Honda Motor Co., Ltd., Tokyo, JP;
Toru Kitamura, Saitama, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
A secondary battery state estimation device includes: a state measurer configured to measure state variables including a terminal current and a terminal voltage of a secondary battery; an internal resistance calculator configured to calculate internal resistance of the secondary battery; an estimated open-circuit-voltage (OCV) calculator configured to calculate an estimated OCV; an estimated state-of-charge (SOC) calculator configured to calculate an estimated SOC, by using an SOC-OCV characteristic model; a differential estimated SOC calculator configured to calculate a differential estimated SOC; an integrated terminal current calculator configured to calculate an integrated terminal current; and a state-of-health (SOH) calculator configured to calculate an SOH. The SOH that the SOH calculator has calculated in a high SOC state where at least the estimated OCV is equal to or above a first threshold value is entered into an SOH estimation model used to estimate the SOH to update the SOH estimation model.