A Novel Power Distribution Strategy and Its Online Implementation for Hybrid Energy Storage Systems of Electric Vehicles

Hybrid energy storage systems (HESS) composed of a battery and ultracapacitor (UC) provide feasible solution to the economy electric vehicles (EVs). To fully exploit potential HESSs, power distribution strategy that can split between UC in HESSs plays an important role. Therefore, novel its online application are proposed this paper. First, new simple model is proposed, parameters optimized offline through particle swarm optimization (PSO). Then, driving condition recognizer based on neural network introduced, realized by combining global recognition. Compared with traditional rule-based strategy, reduces average fluctuation current 52.53% amplitude 11.51%. Meanwhile, it be seen from results very close PSO-based exhibits good performance under all cycles.