Mining vehicle and method for its energy supply

A method for energy supply of a mining vehicle, the method comprising charging an energy source of the mining vehicle, the mining vehicle including a carriage, driving equipment for moving the carriage, at least one mining work device, at least one electric motor for supplying power to the mining work device, a connection for supplying electric power to the electric motor from an electrical network of the mine, and the energy source, wherein the electric motor includes at least a primary stator winding and a secondary stator winding, the primary stator winding and the secondary stator winding being galvanically isolated from each other such that the electrical network of the mine and the energy source are galvanically isolated from each other and wherein, when the mining vehicle is connected to the electrical network of the mine via the primary stator winding, the electric motor supplies, at least for a period of time, power to the at least one mining work device and supplies, at least for a period of time, power via the secondary stator winding, thereby charging the energy source.