Electrified vehicle drivetrain monitoring system
AssigneeFord Global Technologies, LLC
InventorsLewei Qian, Duane M. Grider
Life of this patent
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Abstract
A control system for a vehicle includes a controller. The controller is configured to open traction battery contactors based on a potential between high-voltage cables and a chassis continuously exceeding an amplitude threshold for at least a predefined duration of time. The controller is further configured to selectively open the contactors based on data derived from the potential for periods that are each defined by the potential exceeding and then falling below the amplitude threshold without exceeding the predefined duration of time.
Claims18
A control system for a vehicle comprising:
- a controller configured to
- open traction battery contactors based on a potential between high-voltage cables and a chassis continuously exceeding an amplitude threshold for at least a predefined duration of time, and
- selectively open the traction battery contactors based on vehicle speed and data derived from the potential for periods that are each defined by the potential exceeding and then falling below the amplitude threshold without exceeding the predefined duration of time.
A vehicle fault detection method comprising:
- responsive to a potential between high-voltage cables and a chassis continuously exceeding an amplitude threshold for at least a predefined duration of time, opening traction battery contactors, wherein the amplitude threshold is based on vehicle speed or electric machine rotational speed, and
- responsive to data derived from the potential for periods that are each defined by the potential exceeding and then falling below the amplitude threshold without exceeding the predefined duration of time, selectively opening the traction battery contactors.
A vehicle comprising:
- contactors coupling a traction battery with an electric machine via high-voltage cables;
- and
- a controller configured to, responsive to the vehicle being stopped and frequency domain data derived from a detected potential between the high-voltage cables arid a chassis for periods that are each defined by the potential exceeding and then falling below an amplitude threshold without exceeding a predefined duration of time, selectively open the contactors, wherein the predefined duration of time is based on a rotational speed of the electric machine.
Dependencies are inferred from the claim text.