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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 10601230 B1

PDFFull Text
Date of Patent:
Mar. 24, 2020

Filed:

Oct. 05, 2018

Electric power supply system for vehicle

Applicant:

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

Inventors:

Sunao Horitake, Toyota, JP;

Hiroshi Nate, Nagoya, JP;

Yasuharu Terada, Toyota, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;

Attorney:

Hunton Andrews Kurth LLP

Primary Examiner:

Nathaniel R Pelton

Int. Cl.
CPC ...
H02J 7/00 (2006.01); H02J 7/14 (2006.01); B60L 58/12 (2019.01); B60L 58/21 (2019.01); B60L 58/16 (2019.01); B60L 58/20 (2019.01); B60R 16/033 (2006.01); H02M 3/04 (2006.01);
U.S. Cl.
CPC ...
H02J 7/0004 (2013.01); B60L 58/12 (2019.02); B60L 58/16 (2019.02); B60L 58/20 (2019.02); B60L 58/21 (2019.02); B60R 16/033 (2013.01); H02J 7/0068 (2013.01); H02J 7/1423 (2013.01); H02J 7/1453 (2013.01); H02J 7/1492 (2013.01); H02M 3/04 (2013.01); B60L 2240/427 (2013.01); B60L 2240/54 (2013.01); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/92 (2013.01);
Abstract

An electric power supply system for a vehicle includes a first battery, a second battery connected in parallel with the first battery, a voltage sensor configured to detect a voltage value of the second battery, a current sensor configured to detect a current value of the second battery, an electronic control unit configured to make a voltage of the alternator fluctuate according to a predetermined voltage waveform, and calculate internal resistance of the second battery using the voltage value and the current value of the second battery respectively detected by the voltage sensor and the current sensor while the electronic control unit is making the voltage of the alternator fluctuate according to the predetermined voltage waveform.

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