ELECTRIC VEHICLE ENERGY STORAGE SYSTEMS INCLUDING DC-DC POWER CONVERTERS OPERABLE IN SELECTED OPERATING MODES

An energy storage system includes a plurality of batteries coupled in series, a plurality of DC-DC power converters each having first and second sides, a DC bus coupled to the second sides of the DC-DC power converters, and at least one controller coupled to at least one DC-DC power converter. Each of the DC-DC power converters is configured to operate in a plurality of operating modes. The at least one controller configured to receive a plurality of operating characteristics of the at least one DC-DC power converter and a plurality of setpoints, select an operating mode of the plurality of operating modes for the at least one DC-DC power converter, and control the at least one DC-DC power converter to operate in the selected operating mode based on at least one of the operating characteristics and at least one of the setpoints.