Implementation of Four-Phase Interleaved Balance Charger for Series-Connected Batteries with Power Factor Correction

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Juan, Y.L.^1 ; Lee, Y.T.^1 ; Lee, Y.L.^1 ; Chen, L.L.^1 ; Huang, M.L.^1

Department of Electrical Engineering, National Changhua University of Education, No. 2, Shi-Da Road, Changhua

500, Taiwan^1

关键词: Buck boost converter;    Charging strategies;    Constant current;    Conventional topologies;    Dc link capacitor;    Flyback converters;    Leakage inductance;    Power factor corrections;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012100/pdf
DOI  :  10.1088/1755-1315/94/1/012100

来源: IOP

【 摘 要 】

A four-phase interleaved balance charger for series-connected batteries with power factor correction is proposed in this dissertation. In the two phases of two buckboost converters, the rectified ac power is firstly converted to a dc link capacitor. In the other two phases of two flyback converters, the rectified ac power is directly converted to charge the corresponding batteries. Additionally, the energy on the leakage inductance of flyback converter is bypassed to the dc link capacitor. Then, a dual-output balance charging circuit is connected to the dc link to deliver the dc link power to charge two batteries in the series-connected batteries module. The constant-current/constant-voltage charging strategy is adopted. Finally, a prototype of the proposed charger with rated power 500 W is constructed. From the experimental results, the performance and validity of the proposed topology are verified. Compared to the conventional topology with passive RCD snubber, the efficiency of the proposed topology is improved about 3% and the voltage spike on the active switch is also reduced. The efficiency of the proposed charger is at least 83.6 % within the CC/CV charging progress.