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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 10069311 B1

PDFFull Text
Date of Patent:
Sep. 04, 2018

Filed:

Jun. 26, 2014

Power storage device and method of controlling power storage device

Applicant:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Inventors:

Naoyuki Sugeno, Fukushima, JP;

Kohki Watanabe, Fukushima, JP;

Masumi Terauchi, Fukushima, JP;

Shuichi Takizawa, Fukushima, JP;

Noritoshi Imamura, Miyagi, JP;

Koji Umetsu, Miyagi, JP;

Assignee:

MURATA MANUFACTURING CO., LTD., Kyoto, JP;

Attorney:

Chip Law Group

Primary Examiner:

Stacy Whitmore

Int. Cl.
CPC ...
H02J 7/00 (2006.01); B60L 11/18 (2006.01); H01M 10/42 (2006.01); H02J 7/02 (2016.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01);
U.S. Cl.
CPC ...
H02J 7/0019 (2013.01); B60L 11/184 (2013.01); B60L 11/1816 (2013.01); B60L 11/1824 (2013.01); B60L 11/1862 (2013.01); B60L 11/1866 (2013.01); H01M 10/425 (2013.01); H01M 10/441 (2013.01); H01M 10/482 (2013.01); H02J 7/007 (2013.01); H02J 7/0016 (2013.01); H02J 7/02 (2013.01); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01); H01M 2010/4271 (2013.01); H02J 7/0021 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/7044 (2013.01); Y02T 10/7061 (2013.01); Y02T 10/7072 (2013.01); Y02T 90/121 (2013.01); Y02T 90/128 (2013.01); Y02T 90/14 (2013.01); Y02T 90/163 (2013.01); Y02T 90/169 (2013.01); Y04S 30/14 (2013.01);
Abstract

A power storage device includes: power storage units each including at least one battery, the power storage units being connected in series; cell balance units connected in parallel to the respective power storage units via switches; and a control unit that performs control to charge the power storage units with a first constant current value, and, when the power storage unit having the highest voltage among the power storage units reaches a first potential, connect the corresponding one of the cell balance units to the power storage unit having the highest voltage, and switch the charging current to a second constant current value that is smaller than the first constant current value.

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