Warn a user of a vehicle with an energy store from a lack of energy

摘要

The invention relates to a method and a warning device (300) for warning a user of a vehicle (102) with an energy store (104) against a lack of energy. According to the invention, an amount of energy stored in a branch (108) of a path (106) traveled by the vehicle (102) is stored in the energy store (104), and a directional option (111, 112, 113) of the vehicle (102 ) at the branch (108). Furthermore, the route (131 to 134) associated with the direction option (111, 112, 113) and at the junction (108) is determined, on which the vehicle (102) has an energy charging location (121, 122, 123) at which the energy store ( 104) is chargeable with the lowest anticipated energy requirement. The energy requirement is compared with the amount of energy and a warning is issued warning the user of the directional option (111, 112, 113) when the energy demand is greater than the amount of energy.