In this paper, a new zero voltage switching (ZVS) bidirectional dc-dc converter is proposed. The proposed converter has the capability of operating as a high step-up and high step-down converter because of having bidirectional power flow. The proposed converter is suitable for battery energy storage systems and hybrid electric vehicles. Moreover, in the proposed converter the current ripple at the low voltage and high voltage DC ports is cancelled by using an small inductance filter which causes increasing the lifetime of battery source. The proposed converter is analyzed, and the theoretical results are obtained. The obtained theoretical results are verified by using the experimental results.