How to measure EDLC’s Leakage Current

(1)The supercapacitor to be tested should be fully discharged before testing the leakage current, generally for more than 1 h;

(2)Apply rated voltage across the capacitor UR;

(3)After the super capacitor voltage reaches the rated voltage UR, measure the voltage across the series protection resistor

Calculate leakage current:

*Leakage current (mA);

UV:Voltage across the series resistance (V);

R:Series protection resistance, generally 1000 Ω and below.

Leakage current test circuit diagram