A New Method to Optimize Semiactive Hybrid Energy Storage System for Hybrid Electrical Vehicle by Using PE Function

Table 5

Energy densities of the batteries and SCs.

Parameter	Battery	SC
Power mass ratio when charging/discharging/W/kg	246/492	2287/1762
Power volume ratio when charging/discharging/W/L	355/710	2218/1709
Power cost ratio when charging/discharging/W/$	6.4/12.8	52.3/40.3
Energy mass ratio/Wh/kg	10	1.4
Energy volume ratio/Wh/L	14.6	1.36
Energy cost ratio/Wh/$	0.26	0.032