Power-Balance and Wavelet-Transform Based Power Management of Battery-Supercapacitor Hybrid System for Electric Vehicles 2015-01-0253
Power management of a hybrid energy storage system (HESS) with battery and supercapacitor(SC) is of critical importance for electric vehicles to achieve good driving performance, long traveling range and high energy efficiency. Due to the great differences in dynamic characteristics between battery and supercapacitor, and the complexity of a HESS, proper power management strategy between battery and supercapacitor remains to be challenging. The proposed research in this paper is to develop a power-balance and wavelet-transform based strategy for power distribution in a way such that each device can be utilized optimally. The transient dynamics is first decoupled via wavelet-transform algorithm while the power-balance algorithm is employed to improve system robustness based on the desired velocity-SOC relationship and a fuzzy logical controller. Finally some simulations have been conducted with results shown that the proposed strategy is valid and effective.
Citation: Zhang, Q., Deng, W., and Wu, J., "Power-Balance and Wavelet-Transform Based Power Management of Battery-Supercapacitor Hybrid System for Electric Vehicles," SAE Int. J. Passeng. Cars – Electron. Electr. Syst. 8(1):186-194, 2015, https://doi.org/10.4271/2015-01-0253. Download Citation
Qiao Zhang, Weiwen Deng, Jian Wu
State Key Lab of ASCL Jilin University
SAE 2015 World Congress & Exhibition
SAE International Journal of Passenger Cars - Electronic and Electrical Systems-V124-7EJ