The issue of the regular energy consume for the voltage balance circuit is analyzed. To obtain wide range dynamic balance voltage, both DC/DC converter and gap delay combination control mode are introduced to the ultra capacitor voltage balance circuit. The boost converter is used to achieve voltage balance from lower side ultra capacitor C2 to higher side ultra capacitor C1. Correspondingly, the evolved care unite skin (CUK) converter is used to achieve voltage balance from high side ultra capacitor C1 to low side ultra capacitor C2. Experimental results verify the effectiveness of zero loss voltage balance circuit.