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US 2022/0131359 A1Published application
Method for the detection of an arc fault in an electrical circuitry, and motor vehicle
AssigneeAudi AG
InventorViktor KELL
Life of this patent
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Abstract
A method detects an arc fault in an electrical circuitry. The electrical circuitry includes a controller, an energy storage and a plurality of loads each connected to the energy storage via a respective load path. A current measuring device determines current measurement values describing an energy storage current is assigned to the energy storage. Voltage measuring devices for determining voltage measurement values describing a load voltage at the respective load are assigned to said loads. The current measurement values and voltage measurement values are continuously transmitted to the controller via at least one communication link.
Claims15
A method for detecting an arc fault in an electrical circuitry, the method comprising:
- determining, with a current measuring device assigned to an energy storage of an electrical circuitry, current measurement values indicative of an energy storage current;
- determining, for each of a plurality of loads of the electrical circuitry, voltage measurement values indicative of a load voltage at the load with a respective voltage measuring device assigned to the load, wherein each load is connected to the energy storage by a respective load path;
- continuously transmitting the current measurement values and the voltage measurement values to a controller of the electrical circuitry via at least one communication link;
- detecting a parallel arc in the electrical circuitry by comparing the current measurement values or a change over time of the energy storage current indicated by the current measurement values with at least one current limit value;
- detecting a series arc in one of the load paths by comparing the voltage measurement values or a change over time of the load voltages of the load associated with the load path indicated by the voltage measurement values with at least one voltage limit value assigned to the respective load;
- and
- disconnecting the energy storage from the load associated with the one of the load paths responsive to detecting the parallel arc or switching off the load associated with the one of the load paths responsive to detecting the occurrence of the series arc in the one of the load paths.
4 more elements
A motor vehicle, comprising:
- electrical circuitry including:
- a controller;
- an energy storage;
- and
- a plurality of loads each connected to the energy storage via a respective load path;
- a current measuring device configured to determine current measurement values indicative of an energy storage current;
- and
- a plurality of voltage measuring devices each configured to determine voltage measurement values indicative of a load voltage at a respective load,
- wherein the current measuring devices and the voltage measuring devices are connected to the controller via a communication link for the continuous transmission of the current measurement values and the voltage measurement values, and wherein the controller is configured to control the electrical circuitry to perform a method, the method including:
- determining, with the current measuring device the current measurement values;
- determining the voltage measurement values with the voltage measuring devices;
- continuously transmitting the current measurement values and the voltage measurement values via at least one communication link;
- detecting a parallel arc in the electrical circuitry by comparing the current measurement values or a change over time of the energy storage current indicated by the current measurement values with at least one current limit value;
- detecting a series arc in one of the load paths by comparing the voltage measurement values or a change over time of the load voltages of the load associated with the load path indicated by the voltage measurement values with at least one voltage limit value assigned to the respective load;
- and
- disconnecting the energy storage from the load associated with the one of the load paths responsive to detecting the parallel arc or switching off the load associated with the one of the load paths responsive to detecting the occurrence of the series arc in the one of the load paths.
13 more elements
Dependencies are inferred from the claim text.