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 10434890 B1

Date of Patent:

Oct. 08, 2019

Filed:

Jul. 24, 2017

Lithium ion secondary battery diagnosis device and lithium ion secondary battery diagnosis method

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;

Inventor:

Masatoshi Uchida, Toyota, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Jerry D Robbins

Int. Cl.

CPC ...

G01R 31/389 (2019.01); B60L 11/18 (2006.01); G01R 31/3835 (2019.01); B60L 3/00 (2019.01); H01M 10/44 (2006.01); H02J 7/00 (2006.01); G01R 31/44 (2006.01); H01M 2/10 (2006.01); H01M 2/34 (2006.01); H01M 10/0525 (2010.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); B60L 58/22 (2019.01); B60L 50/60 (2019.01);

U.S. Cl.

CPC ...

B60L 11/1866 (2013.01); B60L 3/0046 (2013.01); B60L 58/22 (2019.02); G01R 31/389 (2019.01); G01R 31/3835 (2019.01); G01R 31/44 (2013.01); H01M 2/1077 (2013.01); H01M 2/34 (2013.01); H01M 10/0525 (2013.01); H01M 10/425 (2013.01); H01M 10/441 (2013.01); H01M 10/482 (2013.01); H02J 7/0029 (2013.01); H02J 7/0031 (2013.01); H02J 7/0047 (2013.01); B60L 50/66 (2019.02); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01); Y02E 60/122 (2013.01); Y02T 10/7011 (2013.01);

Abstract

A controller performs first control to fourth control whenever the voltage of a cell reaches a specified voltage during discharging. The first control is to stop the discharging. The second control is to close a relay connected, in parallel, to a cell having a voltage having reached the specified voltage. The third control is to measure AC impedance in a state in which relays connected, in parallel, to respective corresponding cells having voltages having reached the specified voltage are all closed. The fourth control is to resume discharging cells having voltages higher than the specified voltage. The controller diagnoses whether the cell having the voltage having reached the specified voltage is abnormal, by comparing (i) AC impedance when the cell having the voltage having reached the specified voltage is included with (ii) AC impedance when the cell having the voltage having reached the specified voltage is excluded.

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