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PowerStor Supercapacitors Slide 11

So using the formula C = Iload * td/dVTotal one gets C= 4*5/(16-9)= 2.86 F. This is the total capacitance at 16 V. Since supercapacitor cells are typically rated at 2.5 or 2.7 V then, divide the operating voltage VWV by 2.7 and round up, 16/2.7=5.9, this means the designer will need 6 cells in series. Since capacitance divides with cells in series, the designer will need to calculate the capacitance needed per cell. Using equation 7 to solve for Ccell , Ccell=Ctotal * # in Series =2.86 * 6=17.16 F, the designer will need approximately 17.16 F minimum per supercapacitor cell.

PTM Published on: 2011-08-23
PTM Updated on: 2021-09-30