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. 03, 2016
Filed:
Dec. 01, 2011
Atsushi Baba, Saitama, JP;
Shuichi Adachi, Yokohama, JP;
Atsushi Baba, Saitama, JP;
Shuichi Adachi, Yokohama, JP;
CALSONIC KANSEI CORPORATION, Saitama, JP;
KEIO UNIVERSITY, Tokyo, JP;
Abstract
A battery SoC estimation device includes a discharge-and charge current detection means, a terminal-voltage detection means, a current-integration SoC estimation means, an open-circuit-voltage SoC estimation means, an error estimation means, and an SoC calculating means. The estimation meansestimates a current-integration-method SoC (SoC), calculating variance of current-integration-method SoC based on information on detection accuracy of the detection means. The estimation meansestimates an open-circuit-voltage-method SoC (SoC) corresponding to an open circuit voltage value estimated based on a discharge-and-charge current value and a terminal voltage value, using a battery equivalent circuit model. The estimation meansestimates an estimate error nof the current-integration-method SoC based on a difference between the SoCand the SoC, variance of the SoC, and variance of the SoC. The calculating meanscalculates SoC of a battery based on the SoCand the n.