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Isolation contactor state control system

United States Patent

9,649,939
May 16, 2017
View the Complete Patent at the US Patent & Trademark Office
A controller area network (CAN) installed on a hybrid electric vehicle provides one node with control of high voltage power distribution system isolation contactors and the capacity to energize a secondary electro-mechanical relay device. The output of the secondary relay provides a redundant and persistent backup signal to the output of the node. The secondary relay is relatively immune to CAN message traffic interruptions and, as a result, the high voltage isolation contactor(s) are less likely to transition open in the event that the intelligent output driver should fail.
Bissontz; Jay E. (Fort Wayne, IN)
International Truck Intellectual Property Company, LLC (Lisle, IL)
14/ 398,083
July 13, 2012
U.S. GOVERNMENT RIGHTS This disclosure was made with United States government support under Award No. DE-EE0003303 awarded by the U.S. Department of Energy. The United States government has certain rights in this disclosure.