Weld detection in voltage traction systems
AssigneeVolvo Truck Corporation
InventorsDiego GIL RUBIO, Avinas Kizhakke Marath, Lars Malm
Life of this patent
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Abstract
A computer system performs a weld check in a traction voltage system. The computer system has processing circuitry to open a switch connected to the traction battery and an electrical load of the traction voltage system; measure a first voltage, V1, between the traction battery and ground reference, the first voltage, V1, being measured at a battery side of the traction voltage system in relation to the switch; measure a second voltage, V2, between the electrical load and ground reference, the second voltage, V2, being measured at a load side of the traction voltage system in relation to the switch; and compare the first and second voltages, V1, V2, to determine the presence of a weld in the switch.
Claims20
A computer system for performing a weld check in a traction voltage system comprising a traction battery, the computer system comprising processing circuitry configured to:
- open a switch connected to the traction battery and an electrical load of the traction voltage system;
- measure a first voltage, V1, between the traction battery and ground reference, the first voltage, V1, being measured at a battery side of the traction voltage system in relation to the switch;
- measure a second voltage, V2, between the electrical load and ground reference, the second voltage, V2, being measured at a load side of the traction voltage system in relation to the switch;
- and
- compare the first and second voltages, V1, V2, to determine the presence of a weld in the switch.
A computer-implemented method for performing a weld check in a traction voltage system comprising a traction battery, comprising:
- opening, by processing circuitry of a computer system, a switch connected to the traction battery;
- measuring, by the processing circuitry, a first voltage, V1, between the traction battery and ground reference, the first voltage, V1, being measured at a battery side of the traction voltage system in relation to the switch;
- measuring, by the processing circuitry, a second voltage, V2, between an electrical load and ground reference, the second voltage, V2, being measured at a load side of the traction voltage system in relation to the switch;
- and
- comparing, by the processing circuitry, the first and second voltages, V1, V2, to determine the presence of a weld in the switch.
Dependencies are inferred from the claim text.