Patent ID: 11929475
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 9:
10. A method of thermally controlling a battery system of a vehicle, comprising:
measuring a current through a first inverter connected to a first electric motor, the first inverter configured to control power output from the battery system, wherein the first inverter includes a plurality of phase legs, the plurality of phase legs are selectively connected to a propulsion bus by a set of switches, and a selected phase leg of the plurality of phase legs is selectively connected to a terminal of the battery system by a switch, the measured current provided by rotation of the first electric motor rotating when the first electric motor is not producing torque, or provided by an energy source during vehicle charging;
controlling, by a heating control module, the first inverter to modulate the current through the conversion device and produce an alternating current (AC) heating current, wherein controlling the first inverter includes opening the set of switches to disconnect the plurality of phase legs from the propulsion bus, closing the switch to electrically connect the selected phase leg to the terminal, and controlling the selected phase leg of the first inverter to produce the AC heating current; and
applying the AC heating current to the battery system to heat the battery system to a desired temperature.