A semi-active battery-ultracapacitor hybrid energy source
1.School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Key Laboratory of Facility Agriculture Measurement and Control Technology and Equipment of Machinery Industry, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3.School of Electrical Power Engineering, Nanjing Institute of Technology, Nanjing, Jiangsu 211167, China
Abstract：To weaken the effect of pulse load on the cycle life of battery, a semi-active battery-ultracapacitor hybrid energy source was designed. The battery pack was connected with an ultracapacitor pack by a bothway DC-DC power converter and supplied power at pulse load. The control strategy of hybrid energy storage was that the battery supplied nearly constant current of average load current, while the ultracapacitor supplied the dynamic component to prolong battery cycle. The semi-active and passive battery-ultracapacitor hybrid system were modeled and simulated under MATLAB 7. The results show that the discharging current of battery pack of semi-active hybrid energy source is smoother than that of passive energy source, and the discharging process of the battery pack is optimized.
2014, Vol. 35 
