Method for operating a motor vehicle

An electric vehicle, which comprises:

• a high-voltage on-board electrical system,
• a low-voltage on-board electrical system;
• a DC-to-DC converter, the DC-to-DC converter connecting the high-voltage on-board electrical system and the low voltage on-board electrical system;
• a switching circuit;
• a battery;
• an electromotive main drive;
• and
• at least one system used to influence at least partially the locomotion of the motor vehicle and/or a function required for the safety of the motor vehicle;
• wherein
• the high-voltage on-board electrical system is connected to the battery via the switching circuit;
• wherein
• the electromotive main drive is fed by the high-voltage on-board electrical system;
• and wherein
• the low-voltage on-board electrical system connects to the at least one system used to influence at least partially the locomotion of the motor vehicle and/or a function required for the safety of the motor vehicle;
• wherein
• the electric vehicle is configured to:
• determine an emergency mode and/or a situation leading to the start of the emergency mode;
• and
• upon determining the emergency mode, selectively:
• terminate an electrical contacting of the battery with the high-voltage on-board electrical system by the switching circuit;
• and
• operate the main drive as a generator, such that electrical energy is fed into the high-voltage on-board electrical system and into the low-voltage on-board electrical system via the DC-to-DC converter at least until the electric vehicle reaches a standstill.