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.:
Date of Patent:
Sep. 10, 2013
Filed:
Feb. 16, 2009
Tomomi Maruyama, Konosu, JP;
Eiji Saiki, Konosu, JP;
Akitoshi Kato, Kawasaki, JP;
Yoshihiro Honda, Tokorozawa, JP;
Tomomi Maruyama, Konosu, JP;
Eiji Saiki, Konosu, JP;
Akitoshi Kato, Kawasaki, JP;
Yoshihiro Honda, Tokorozawa, JP;
Iwasaki Electric Co., Ltd., Tokyo, JP;
Tokyo Rectifier Co., Ltd., Kawasaki-Shi, JP;
JPS Co., Ltd., Tokorozawa-Shi, JP;
Abstract
The present invention aims to suppress waste of charging power during charging and improve charging efficiency. A charging apparatusfor charging a cell group, in which a plurality of secondary cellsare connected in series, by supplying a charging current Ic to the secondary cellsis provided with an overcharge protection circuitincluding discharge route circuitsprovided to each of the secondary cellsand adapted to cause the secondary cellsto discharge during charging by connecting the secondary cellsto the discharge route circuitsbased on cell voltages Vb of the secondary cellsor to stop discharging by cutting off the secondary cellsfrom the discharge route circuits; and a charger controllerfor continuing charging while reducing the charging current Ic until the discharge of the secondary cellhaving started discharging to the discharge route circuitis stopped when the discharge of any one of the secondary cellsto the discharge route circuitis started by the overcharge protection circuit