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:
Jan. 15, 2013
Filed:
Oct. 16, 2008
Joong Hui Lee, Daejeon, KR;
Soo Yeup Jang, Daejeon, KR;
Jeon Keun OH, Daejeon, KR;
Gun Woo Moon, Daejeon, KR;
Hong Sun Park, Daejeon, KR;
Chol Ho Kim, Daejeon, KR;
Joong Hui Lee, Daejeon, KR;
Soo Yeup Jang, Daejeon, KR;
Jeon Keun Oh, Daejeon, KR;
Gun Woo Moon, Daejeon, KR;
Hong Sun Park, Daejeon, KR;
Chol Ho Kim, Daejeon, KR;
SK Innovation Co., Ltd., Seoul, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Abstract
A two-stage charge equalization apparatus for a series-connected battery string includes a battery module having a plurality of batteries connected in series; a battery string having M (M≧2) battery modules connected in series; M charge control switch modules connected in parallel to each of the M battery modules; M second DC/DC converters connected to each of the M charge control switch modules; a single first DC/DC converter connected to the M second DC/DC converter; and a microprocessor controlling the charge control switch module, wherein the first DC/DC converter is inputted with an overall potential of the battery string and outputs a potential lower than the potential inputted and each of batteries composing the battery module shares the second DC/DC converter using the charge control switch module.