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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 8796996 B1

PDFFull Text
Date of Patent:
Aug. 05, 2014

Filed:

Jun. 04, 2010

Charge control circuit, battery pack, and charge system

Applicants:

Toshiyuki Nakatsuji, Hyogo, JP;

Tsuyoshi Morimoto, Osaka, JP;

Inventors:

Toshiyuki Nakatsuji, Hyogo, JP;

Tsuyoshi Morimoto, Osaka, JP;

Assignee:

Panasonic Corporation, Osaka, JP;

Attorney:

McDermott Will & Emery LLP

Primary Examiner:

Edward Tso

Assistant Examiner:

Alexis Boateng

Int. Cl.
CPC ...
H02J 7/00 (2006.01); H02J 7/14 (2006.01); H01M 10/44 (2006.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); H01M 2/34 (2006.01); H01M 10/46 (2006.01);
U.S. Cl.
CPC ...
H02J 7/0073 (2013.01); H01M 10/44 (2013.01); H01M 10/425 (2013.01); H01M 10/48 (2013.01); H01M 10/486 (2013.01); Y02E 60/12 (2013.01); H01M 10/46 (2013.01); H01M 2200/10 (2013.01); H01M 2/348 (2013.01); H01M 2/34 (2013.01);
Abstract

A charge control circuit includes a charge control unit that controls an operation of a charging unit that charges a rechargeable battery; and a voltage detection unit that detects a terminal voltage of the rechargeable battery, wherein when a terminal voltage of the rechargeable battery as detected by the voltage detection unit is lower than a predetermined first threshold-value voltage, being lower than a full-charge voltage which is a terminal voltage of the rechargeable battery in full charge, the charge control unit causes a constant current charging to the rechargeable battery by requesting the charging unit to supply a charging current of a predetermined first current value, causing the charging unit to supply a charging current of the first current value to the rechargeable battery, when the terminal voltage of the rechargeable battery as detected by the voltage detection unit exceeds the first threshold-value voltage but is less than the full charge voltage, the charge control unit causes the constant current charging to the rechargeable battery by requesting the charging unit to supply a charging current of a second current value that is smaller than the first current value, causing the charging unit to supply a charging current of the second current value to the rechargeable battery, and when the terminal voltage of the rechargeable battery as detected by the voltage detection unit is equal to or greater than the full charge voltage, the charge control unit causes a constant voltage charging to be carried out by causing the charging unit to supply the full charge voltage to the rechargeable battery, as a charge voltage.

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Nakatsuji, Toshiyuki. (2014). Charge control circuit, battery pack, and charge system (U.S. Patent No. 8796996). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8796996

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