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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.:

US 12019123 B1

PDFFull Text
Date of Patent:
Jun. 25, 2024

Filed:

Mar. 18, 2022

Battery system and method of estimating polarization voltage of secondary battery

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota, JP;

Inventor:

Yuki Sugo, Toyota, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;

Attorney:

Oliff PLC

Primary Examiner:

Thang X Le

Assistant Examiner:

Haidong Zhang

Int. Cl.
CPC ...
G01R 31/3842 (2019.01); B60L 53/16 (2019.01); B60L 53/20 (2019.01); B60L 58/12 (2019.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01); H02J 7/02 (2016.01);
U.S. Cl.
CPC ...
G01R 31/3842 (2019.01); B60L 53/16 (2019.02); B60L 53/20 (2019.02); B60L 58/12 (2019.02); H01M 10/48 (2013.01); H02J 7/0048 (2020.01); H02J 7/02 (2013.01); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01); H01M 2220/20 (2013.01); H02J 2207/20 (2020.01);
Abstract

A battery pack comprises a battery, a voltage sensor that detects a voltage of the battery, a power converter that transmits and receives electric power to and from the battery, an SMR and a charging relay electrically connected between the battery and the power converter, and a processor that estimates a polarization voltage Vp of the battery according to the following formula: Vp=a×{1−exp(−√t/b)}. The processor determines coefficients a and b based on first and second voltages. The first voltage is detected by the voltage sensor within a first period of time after the SMR is opened and the second voltage is detected by the voltage sensor within a second period of time before the charging relay is closed.

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Sugo, Yuki. (2024). Battery system and method of estimating polarization voltage of secondary battery (U.S. Patent No. 12019123). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12019123

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