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:
Jul. 15, 2014
Filed:
Apr. 17, 2009
Joong Hui Lee, Daejeon, KR;
Jae Hwan Lim, Daejeon, KR;
Sang Hyun Park, Daejeon, KR;
Gun-woo Moon, Daejeon, KR;
Hong Sun Park, Daejeon, KR;
Chol-ho Kim, Daejeon, KR;
Joong Hui Lee, Daejeon, KR;
Jae Hwan Lim, Daejeon, KR;
Sang Hyun Park, Daejeon, KR;
Gun-Woo Moon, Daejeon, KR;
Hong Sun Park, Daejeon, KR;
Chol-Ho Kim, Daejeon, KR;
SK Innovation Co., Ltd., Seoul, KR;
Abstract
A two-stage charge equalization apparatus for a series-connected battery string having a two-stage DC-DC converter including a first DC-DC converter; and a second DC-DC converter which is inputted. A battery string is divided into one or more battery modules having a plurality of battery cells connected in series, and a current conversion switch module forms a path of the charge current between the battery module and the second DC-DC converter to allow the charge current to be applied to the particular battery cell composing the battery module and controls an application direction of the charge current. A microprocessor determines a battery cell to be charged of a low-charged battery cell and controls the current conversion switch module to allow the charge current to be applied to the battery cell to be charged.