| 摘要 |
The invention relates to a method for starting a hybrid drive by means of an auxiliary energy source, said method comprising the following steps: an electric motor and an internal combustion engine are both provided in the hybrid drive for generating kinetic energy; a traction battery for supplying the electric motor with traction energy, an on-board supply system for starting the internal combustion engine under normal operation, and a converter control system for controlling a DC/DC converter which is used to supply the on-board supply system from the traction battery, are provided, the on-board supply system supplying the converter control system. If the energy remaining in the on-board supply system is not sufficient for the operation of the converter control system nor for starting the internal combustion engine, during an emergency operation caused by an insufficient amount of energy in the on-board supply system, an external auxiliary energy quantity smaller than the amount of energy deficit is supplied to the converter control system in order to at least temporarily ensure the operation of the converter control system. The DC/DC converter is activated by the converter control system, and a quantity of start process energy from the traction battery is fed into the on-board supply system via the DC/DC converter, which, together with the energy remaining in the on-board supply system, is sufficient for starting the internal combustion engine. As a result, the internal combustion engine is started. The invention also relates to an associated emergency supply circuit, and to a mobile auxiliary starting battery. |
