Patent ID: 11916429
Assignee: FORD GLOBAL TECHNOLOGIES, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 10:
11. A method for operating a power system comprising:
responsive to a state of charge of an auxiliary battery that is electrically connected with a bidirectional power transfer inverter and configured to provide power to the bidirectional power transfer inverter during an absence of grid power being less than a predetermined value, charging the auxiliary battery with power from a traction battery electrically connected with the bidirectional power transfer inverter via electric vehicle supply equipment;
responsive to a temperature of the auxiliary battery being less than a target temperature value, powering a heater configured to heat the auxiliary battery with energy from the traction battery; and
after activation of control circuitry of the bidirectional power transfer inverter using power from the auxiliary battery while the grid power is unavailable, ramping down the power from the auxiliary battery and ramping up power to the bidirectional power transfer inverter from a storage battery.