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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 11067637 B1

PDFFull Text
Date of Patent:
Jul. 20, 2021

Filed:

Apr. 20, 2018

Apparatus and method of estimating state of lithium ion battery

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota, JP;

Inventors:

Ryo Kanada, Toyota, JP;

Koji Umemura, Okazaki, JP;

Akemi Nakatake, Nagoya, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Jeremiah R Smith

Int. Cl.
CPC ...
H01M 10/48 (2006.01); G01R 31/392 (2019.01); H01M 10/052 (2010.01); H02J 7/14 (2006.01); H01M 10/0525 (2010.01); H01M 50/20 (2021.01); G01R 31/389 (2019.01); H02J 7/00 (2006.01); H01M 10/44 (2006.01); G01R 31/374 (2019.01); H01M 10/42 (2006.01); G01R 31/367 (2019.01);
U.S. Cl.
CPC ...
G01R 31/392 (2019.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01); H01M 10/484 (2013.01); H01M 10/486 (2013.01); H01M 50/20 (2021.01); H02J 7/14 (2013.01); G01R 31/367 (2019.01); G01R 31/374 (2019.01); G01R 31/389 (2019.01); H01M 10/443 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01); H02J 7/0049 (2020.01);
Abstract

A control device calculates an amount of increase ΔAm in freezing temperature measurement value Am from an initial freezing temperature Δand calculates an amount of lowering in capacity corresponding to the amount of increase ΔAm in freezing temperature as an amount of lowering in capacity ΔBx due to deterioration of a material. The control device calculates an amount of lowering in capacity measurement value Bm from an initial capacity Bas a whole amount of lowering in capacity ΔBm and calculates a material deterioration ratio X by using ΔBx and ΔBm. The control device calculates a value resulting from subtraction of ΔBx from ΔBm as an amount of lowering in capacity ΔBy due to precipitation of Li and calculates an Li precipitation deterioration ratio Y by using ΔBy and ΔBm.

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