This paper proposes a new structure of cell voltage equalizer combining two conventional circuits, a chain structure of switched capacitor and a modularized switched capacitor. The equalization time and efficiency of the proposed circuit are less affected by the initial voltage variation. Also, a new structure of a bidirectional switch is proposed, which reduces 3N/2 MOSFETs with driving circuit in N-cell string. Characteristics of the equalization performance with two conventional structures and with two proposed ones are compared in simulation and circuit experiment.