Importance

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Abstract

A method of operating an electric or a fuel cell motor vehicle. The vehicle has an electric machine which can operate as motor or generator and serves as a drive assembly. The electric machine is connected, via an AC/DC converter, to a high-voltage distributor. A high-voltage battery, high-voltage loads, and, via a high-voltage low voltage DC/DC converter, low-voltage loads are connected to the distributor. When the electric machine is operated as a generator in an overrun operation of the vehicle, the electric energy generated by the electric machine is calculated. The high-voltage battery, the high-voltage loads, and possibly the low-voltage loads, are operated, depending on driver and/or non-driver settings, such that the energy produced by electric machine is distributed between the high voltage battery, the high-voltage loads, and, if necessary, the low-voltage loads so as to minimize a difference between the energy produced and consumed by the electric machine.

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First Claim