Predictively controlling the state of charge of an energy storage device of an electrically operated motor vehicle

The disclosure relates to a process for route-dependent control of an energy storage device of an at least partially electrically operated motor vehicle, for example a mild-hybrid passenger vehicle, which is implemented by a charge state control device. In this process, said device receives at least one information-containing data value, which relates to a driving situation to be expected on a route section of a driving route. A prediction of the energy requirement of a first device of an onboard network on the route section takes place using the information received. When a predetermined lower threshold value of the predicted energy requirement of the first device is not met, a control signal is generated that causes an energy quantity of an energy reserve of the energy storage device reserved for the first device of the onboard network to be allocated at least partially to a second device of the onboard network. The process may comprise a predicting of a value of a freely available energy reserve of the energy storage device on the route section as a function of the predicted energy requirement and an at least partial allocation of the predicted freely available energy reserve to the second device.