Fault detection in a multi-high voltage bus system
AssigneeFord Global Technologies, LLC
InventorsMichael Edward LOFTUS, Benjamin A. TABATOWSKI-BUSH, Michael SCHAMBER, Jianwei LI
Life of this patent
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Abstract
A vehicle bus system includes a controller programmed to, after issuing a command to close a pair of contactors arranged to share a battery terminal and each configured to power a load when closed, initiate pre-charge of another terminal in response to voltages across the contactors exceeding corresponding closed-state thresholds, and generate a notification and preclude initiation of the pre-charge in response to one of the voltages being less than the corresponding closed-state threshold.
Claims17
A vehicle bus system comprising:
- a controller programmed to, after issuing a command to close a pair of contactors arranged to share a battery terminal and each configured to power a load when closed, initiate pre-charge of another terminal in response to voltages across the contactors exceeding corresponding closed-state thresholds, and generate a notification and preclude initiation of the pre-charge in response to one of the voltages being less than the corresponding closed-state threshold.
A method comprising:
- after issuing by a controller a command to close a pair of contactors arranged to share a battery terminal and each configured to power a load when closed, initiating pre-charge of another terminal in response to voltages across the contactors being greater than corresponding closed-state thresholds, and generating a notification and precluding initiation of the pre-charge in response to one of the voltages being less than the corresponding closed-state threshold.
A vehicle bus controller comprising:
- input channels configured to receive signals indicative of voltages across a pair of contactors arranged to share a battery terminal and each configured to power a load when closed;
- output channels configured to provide a command to close the contactors, provide a command to initiate pre-charge of another traction battery terminal, and provide a notification;
- and
- control logic configured to, after issuance of the command to close the contactors, generate the command to initiate pre-charge of another terminal in response to the voltages being greater than corresponding closed-state thresholds and to generate the notification in response to one of the voltages being less than the corresponding closed-state threshold for a period longer than a closing delay of the corresponding contactor.
Dependencies are inferred from the claim text.