CIRCUIT ARRANGEMENT FOR A VEHICLE ELECTRICAL SYSTEM OF AN ELECTRICALLY DRIVEN MOTOR VEHICLE AND METHOD FOR OPERATING A CIRCUIT ARRANGEMENT OF THIS TYPE

The invention relates to a circuit arrangement () for a vehicle electrical system of an electrically driven motor vehicle (), comprising: a high-voltage battery () for supplying power to an electrical drive machine () of the motor vehicle (); a range extender (), which is designed to charge the high-voltage battery () and which has a plurality of identical fuel-cell base modules () having interfaces for supplying reactants in the form of hydrogen and air; a switching device () for connecting the range extender (), the circuit arrangement () having no DC-to-DC converter; a control device () which is designed to carry out the following steps after the control device has received an activation signal regarding the range extender (): determining an operating point of the range extender () in dependence on at least one variable of the high-voltage battery (); defining a setpoint value regarding the supply of the reactants to the fuel-cell base modules () and/or a setpoint value regarding an operating temperature of the fuel cells on the basis of the determined operating point; controlling a system (), which is designed to provide the reactants to and/or to control the temperature of the fuel cells, in accordance with each defined setpoint value; controlling the switching device () so as to connect the range extender (), only after the setpoint value regarding the supply of the reactants and/or the setpoint value regarding the operating temperature has been reached. The invention further relates to an electrically driven motor vehicle () having the circuit arrangement (), and to a method for operating the circuit arrangement ().