Back to results
US 10,476,262 B2Granted
Dual-bus battery precharge circuit
AssigneeFord Global Technologies, LLC
InventorsWesley Edward Burkman, John Sturza
Life of this patent
Estimating the term…
Abstract
A power control system for a vehicle includes a precharge circuit that is configured to selectively couple a resistor across either a main or return contactor that are configured to selectively couple terminals of a battery to a load bus. The power control system includes a controller programmed to, in response to a precharge request in a presence of the main contactor being closed when commanded to open and the return contactor being open, couple the resistor across the return contactor to precharge the load bus.
Claims18
A vehicle comprising:
- a precharge circuit configured to selectively couple a resistor across either a first or second contactor that are configured to selectively couple terminals of a battery to a load bus;
- and
- a controller programmed to, in response to a precharge request in a presence of the first contactor being closed when commanded to open and the second contactor being open, couple the resistor across the second contactor to precharge the load bus.
A method comprising:
- coupling a resistor across a first contactor coupled between negative terminals of a battery and a load bus in response to a precharge request and a second contactor, coupled between positive terminals of the battery and the load bus, being shorted closed when commanded to open;
- and
- coupling the resistor across the second contactor in response to the precharge request and the second contactor being open.
A vehicle comprising:
- a precharge circuit configured to selectively couple a resistor across either a first or second contactor that are configured to selectively couple terminals of a battery to a load bus;
- and
- a controller programmed to, in response to a precharge request that follows an immediately preceding precharge request that resulted in coupling the resistor across the first contactor, couple the resistor across the second contactor to precharge the load bus.
Dependencies are inferred from the claim text.