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PowerStor Supercapacitors Slide 16

Using resistor values that are much lower than the effective leakage current resistance causes the difference between the two leakage current levels to be minimised, thus reducing the voltage imbalance. In the example shown the addition of balancing resistors that are 10 times lower in value than the equivalent leakage current resistance causes the voltage on capacitor C1 to be reduced from 3V to 2.55V. The lower the value of the balancing resistor the faster voltage balance is achieved and the more accurate it is. It is normally recommended to use a value of balancing resistor that is at least 10 times lower than the worst case equivalent leakage current resistance.

PTM Published on: 2011-08-23