Method and device for operating a hybrid vehicle in the event of a fault in an energy system

摘要

A method for operating a hybrid vehicle, the vehicle being driven by at least two power plants, and at least one electric power plant charging a high voltage energy system which supplies a low voltage energy system with electrical energy, a high voltage being converted into a low voltage for supplying at least one control unit of the vehicle, and the vehicle being disconnected from the electric power plant when a fault is detected in the high voltage system. To maintain the energy supply to the control units via the low voltage system even in the event of a fault in the high voltage system, the power plant is placed in a state for generating a voltage which is uncritical for the safety of the user after the high voltage system is disconnected, the safety-uncritical voltage being converted into the low voltage for supplying the at least one control unit.

主权项

1. A method for operating a hybrid vehicle in the event of a fault in an energy system, the method comprising:
placing at least one electric power plant in a state for generating a voltage which is uncritical for safety of a user after a high voltage energy system is disconnected, wherein the hybrid vehicle is driven by at least two power plants, together or separately, and the at least one electric power plant electrically charging a high voltage energy system which supplies a low voltage energy system with electrical energy, a high voltage being converted into a low voltage for supplying at least one control unit of the hybrid vehicle, and the hybrid vehicle being disconnected from the electric power plant when a fault is detected in the high voltage energy system; and converting the safety-uncritical voltage into the low voltage for supplying the at least one control unit; wherein the electric power plant is an electric motor which is switched from a torque-regulated mode to a voltage-regulated mode.