A bi-directional DC-DC resonant converter with bi-directional voltage control includes: primary converter terminals defining a primary voltage; secondary converter terminals defining a secondary voltage; a transformer device having primary transformer terminals and secondary transformer terminals; a resonant tank device having first and second primary resonant tank terminals defining a primary resonant tank voltage and first and second secondary resonant tank terminals defining a secondary resonant tank voltage, wherein the primary tank terminals are connected to the secondary transformer terminals; a primary switching circuit connected between the primary converter terminals and the primary transformer terminals; and a secondary switching circuit connected between the secondary resonant tank terminals and the secondary converter terminals.