Patent ID: 11173788

Abstract:
The invention relates to a method for operating a motor vehicle (2) which has an electric high-voltage network (3) and an electric low-voltage network (4), wherein the high-voltage network (3) has at least one traction battery (5) and at least one electric drive machine (6), the low-voltage network (4) has a vehicle electrical system battery (9), and the high-voltage network (3) is monitored for an electrical short-circuit and, upon detection of a short-circuit, the traction battery (5) is disconnected from the high-voltage network (3). According to the invention, in order to check the plausibility of the detected short-circuit before the traction battery (5) is reconnected to the high-voltage network (3), a boost current (IHV) is applied to the high-voltage network (3) through the low-voltage network (4) by means of a DC/DC converter (11), and a boost voltage (UHV) measured in the high-voltage network (3) is compared with an expected boost voltage (UHV,soll).