发明名称 |
Two-stage charge equalization method and apparatus for series-connected battery string |
摘要 |
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. |
申请公布号 |
US8779722(B2) |
申请公布日期 |
2014.07.15 |
申请号 |
US200912988901 |
申请日期 |
2009.04.17 |
申请人 |
SK Innovation Co., Ltd. |
发明人 |
Lee Joong Hui;Lim Jae Hwan;Park Sang Hyun;Moon Gun-Woo;Park Hong Sun;Kim Chol-Ho |
分类号 |
H02J7/00;H02J7/34 |
主分类号 |
H02J7/00 |
代理机构 |
The Webb Law Firm |
代理人 |
The Webb Law Firm |
主权项 |
1. A two-stage charge equalization apparatus for a battery string having two or more battery cells connected in series, comprising:
a two-stage DC-DC converter including a first DC-DC converter which is inputted with a total voltage of the battery string and outputs a voltage lower than the voltage inputted; and a second DC-DC converter which is inputted with an output of the first DC-DC converter and outputs a charge current for charging a particular battery cell, wherein the battery string is divided into one or more battery modules having a plurality of battery cells connected in series and the second DC-DC converter is provided for each battery module; a current conversion switch module which 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; and a microprocessor which 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. |
地址 |
Seoul KR |