DocumentCode :
74253
Title :
A High-Efficiency Active Battery-Balancing Circuit Using Multiwinding Transformer
Author :
Siqi Li ; Mi, Chunting Chris ; Mengyang Zhang
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Michigan-Dearborn, Dearborn, MI, USA
Volume :
49
Issue :
1
fYear :
2013
fDate :
Jan.-Feb. 2013
Firstpage :
198
Lastpage :
207
Abstract :
This paper presents a simple circuit for balancing series-connected battery cells. The circuit is composed of one low-voltage metal-oxide-semiconductor field-effect transistor (MOSFET) for each cell and a symmetrical multiwinding transformer for a group of cells. Only one control signal is needed for all MOSFETs, and energy can be directly transferred from higher voltage cells to lower voltage cells. A small capacitor is added to form a resonant circuit with the transformer magnetizing inductance so that soft switching can be achieved in some operation range to obtain high efficiency. The circuit balance function and soft-switching condition are analyzed and verified by simulation and experiments. A circuit for balancing a 4- and 12-cell battery group is tested. The experimental results showed the effectiveness of the circuit. The energy transfer efficiency between cells can reach up to 93%. The circuit can be easily scaled to battery strings containing up to 12 battery cells, directly applicable to consumer electronics application where the number of cells is typically less than 12. A battery pack containing a large number of battery cells, such as the ones used in electric vehicles, can be balanced in groups, for example, in modules containing 12 cells each and with one additional circuit to balance among the modules.
Keywords :
MOSFET; capacitors; cells (electric); consumer electronics; energy conservation; low-power electronics; modules; transformer windings; MOSFET; balancing series-connected battery cell; capacitor; consumer electronics application; electric vehicle; energy transfer efhciency; high-efficiency active battery-balancing circuit; low-voltage metal-oxide-semiconductor field-effect transistor; resonant circuit; soft-switching condition; symmetrical multiwinding trans- former; transformer magnetizing inductance; voltage cell; Batteries; Bismuth; Integrated circuit modeling; MOSFET circuits; Mathematical model; Resistance; Windings; Batteries; battery balancing; electric vehicle; multiwinding transformer; plug-in hybrid electric vehicle; soft-switching;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.2012.2229455
Filename :
6359904
Link To Document :
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