Patent ID: 11863004
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 9:
10. An electrified powertrain system, comprising:
a direct current (DC) bus;
a power inverter having a DC side and an alternating current (AC) side;
a battery pack connected to the DC bus and to the DC side of the power inverter;
a polyphase rotary electric machine connected to the AC side of the power inverter and to a mechanical load; and
a split-phase bidirectional on-board charger (OBC) connected to the battery pack, and having a charging mode and a discharging mode, the OBC comprising:
a switchgear block connectable to an offboard charging station during the charging mode and to an external AC electrical load during the discharging mode;
a first DC-AC converter;
a second DC-AC converter, wherein the first DC-AC converter and the second DC-AC converter are connected to the switchgear block; and
a DC-DC converter connected to the first DC-AC converter, the second DC-AC converter, and the DC bus, wherein the first DC-AC converter and the second DC-AC converter have a respective power capability that is about half of a power capability of the DC-DC converter, and wherein:
during the charging mode the first DC-AC converter and the second DC-AC converter are configured to output a DC link voltage to the DC-DC converter, and the DC-DC converter is configured to output a DC charging voltage or current to the DC bus when the DC link voltage reaches a predetermined value; and
during the discharging mode the first DC-AC converter and the second DC-AC converter are configured to receive a DC discharging voltage or current from the DC-DC converter and together selectively output a split-phase AC voltage through the switchgear block to power the external AC electrical load.