A new topology of switched capacitor circuit for the balance system of ultra-capacitor stacks

The quick equalization technology of ultra-capacitor stacks in series can protect ultra-capacitors and make full use of limited capacitance. Ultra-capacitorpsilas high specific power and charging current require a higher equalization speed. Therefore a method related with buck-boost conversion for switched capacitorspsila equalization was developed. The design method for circuit parameters and corresponding equalization control algorithm were introduced. The simulation and experiment show that this method with high precision can realize quick equalization and meet the demand of charging and discharging with high current.