Abstract: The present invention relates to an energy management system including a motor, an inverter electrically connected to the motor, a DC-DC converter electrically connected to the inverter, a first energy storage unit electrically connected to a DC link of the inverter through the DC-DC converter, a second energy storage unit coupled to the inverter, and a control unit. The control unit is configured to control the distribution of electrical power from the first energy storage unit and the second energy storage unit to the inverter in dependence upon a predetermined power threshold.

Abstract: The present invention relates to an energy management system including a motor, an inverter electrically connected to the motor, a DC-DC converter electrically connected to the inverter, a first energy storage unit electrically connected to a DC link of the inverter through the DC-DC converter, a second energy storage unit coupled to the inverter, and a control unit. The control unit is configured to control the distribution of electrical power from the first energy storage unit and the second energy storage unit to the inverter in dependence upon a predetermined power threshold.

Abstract: A direct current (DC) electric system includes a DC link, a first energy storage system (ESS), a second ESS, a coupling device, and a bidirectional DC-DC power converter. The first ESS is coupled to the DC link and stores energy for output at a first nominal voltage. The second ESS stores energy for output at a second nominal voltage greater than the first nominal voltage. A second ESS low side is coupled to a DC link low side. The coupling device is coupled between a second ESS high side and a DC link high side. The coupling device selectively transfers energy from the second ESS to the DC link. The bidirectional DC-DC power converter selectively transfers energy from the second ESS to the DC link and from the DC link to the second energy storage system.