Economic analysis of EDLC/battery hybrid energy storage

Electric double-layer capacitor (EDLC) is a perfect complement of battery in technical character. The EDLC/battery hybrid has the virtues of high energy density, high power density and long cycle life. The model of the hybrid was established and the performance was analyzed in this paper. In pulsed load applications, the amount of battery and system cost can be reduced largely due to the high power density of EDLC. In renewable power systems, the life of battery is prolonged and the operating cost of the whole system is reduced with most of the small charging-discharging cycles carried out by EDLC. The EDLC/battery hybrid has a nice economic effect and is valuable especially in pulsed load applications and renewable systems.