Vehicle having a high-voltage on-board power supply and method for operating the high-voltage on-board power supply

A vehicle comprising:

• a high-voltage on-board power supply, wherein the high-voltage on-board power supply comprises
• a traction battery;
• a charging connection configured to electrically couple to a vehicle-external DC charging station;
• a high-voltage positive potential line;
• a high-voltage negative potential line, and
• a reference potential line,
• wherein a DC converter is arranged in one of the positive and negative high-voltage potential lines, and a series connection comprising a varistor and a current measuring device is arranged between the other of the positive and negative high-voltage potential line and the reference potential line, wherein a processing unit, coupled to the current measuring device and the DC converter, is configured to switch off the DC converter such that the function of the DC converter is stopped when a current intensity measured by the current measuring device exceeds at least one predetermined limit value, or
• wherein a DC converter is arranged in each of the positive and negative high-voltage potential lines, and a series connection comprising a varistor and a current measuring device is arranged between each of the positive and negative high-voltage potential lines and the reference potential line, wherein a processing unit, coupled to the respective current measuring device and the DC converters, is configured to switch off the DC converters such that the function of the DC converter is stopped when a current intensity measured by at least one of the current measuring devices exceeds at least one predetermined limit value.

A method for operating a high-voltage on-board power supply of a vehicle, wherein the high-voltage on-board power supply comprises a traction battery, a charging connection configured to electrically couple to a vehicle-external DC charging station, a high-voltage positive potential line, a high-voltage negative potential line, and a reference potential line, wherein a DC converter is arranged in one of the positive and negative high-voltage potential lines, and a series connection comprising a varistor and a current measuring device is arranged between the other of the positive and negative high-voltage potential line and the reference potential line, wherein a processing unit is coupled to the current measuring device and the DC converter, or wherein a DC converter is arranged in each of the positive and negative high-voltage potential lines, and a series connection comprising a varistor and a current measuring device is arranged between each of the positive and negative high-voltage potential lines and the reference potential line, wherein a processing unit is coupled to the respective current measuring device and the DC converters, the method comprising:

• evaluating, by the processing unit, the current measuring device or the respective current measuring device;
• and
• switching off the DC converter when the current intensity measured by the current measuring device exceeds at least one predetermined limit value or when the current intensity measured by at least one of the current measuring devices exceeds at least one predetermined limit value.