Abstract: An electric auxiliary drive for bicycles includes an electric motor having a stator which is connected to a bicycle frame. A rotor is connected to a rotatable part of a bottom bracket of a bicycle on a left-hand side in a direction of travel. The rotor has a magnet. A control device adjusts the power of the electric motor with a control circuit arrangement. A torque sensor is connected to the control circuit arrangement. The rotor is arranged in a co-rotating housing which is connected to a pedal crank and which is arranged on a bottom bracket shaft in an interlocking manner. The stator is arranged in a housing connected to the bicycle frame and secured against rotation.

Abstract: The invention relates to a smart energy store for mobile consumers. The area of application of the invention is electrically driven vehicles, for example bicycles with an auxiliary electric drive. The invention is based on the object of improving an energy store, which is designed to be removable, for mobile consumers in relation to operability and efficiency. The object is achieved by means of an energy store which has a cell unit with connected battery management system, an indicator device connected to the battery management system, contact means, connected to the battery management system, for connecting to contact means of the mobile consumer at least in the form of high-power contacts and an input device connected to the battery management system. (FIG.

Abstract: The invention relates to an electric auxiliary drive for bicycles, which electric auxiliary drive acts so as to assist, muscle power or independently of the pedals depending on a suitable parameter, for example the crank power exerted on the force transmission. The invention is based on the object of improving electric auxiliary drives of this kind in respect of simple production and the ability to retrofit them. An electric motor having a stator which is connected to a bicycle frame and having a rotor which is connected to a rotatable part of a bottom bracket of a bicycle is arranged on the left-hand side in the direction of travel, wherein the rotor has one or more permanent magnets, and a control device for adjusting the power of the electric motor with a control circuit arrangement and with an actual value sensor, which is connected to the control circuit arrangement, for detecting the torque which acts on the rotatable part of the bottom bracket, is provided.