Abstract: The present invention provides a connecting device for connecting at least two floating bodies, in particular at least two stand-up paddle boards, side by side, comprising: a linkage having at least one rod; and a plurality of fastening means arranged on the at least one rod of the linkage, at least some of the plurality of fastening means being provided axially displaceable along the axis of the at least one rod of the linkage adapted to the respective geometry of the at least two floating bodies such that each floating body can be clamped between at least two fastening means on the at least one rod of the linkage in a positionally stable manner.

Abstract: Device and method for dynamically adjusting an operating voltage for an electric motor (9), which voltage is provided by a voltage source (1) formed in a modular manner, wherein modules (2-i) of the voltage source (1) formed in a modular manner are switched in dependence upon a rotational speed (n) of the electric motor (9) such that the overall degree of efficiency of the electric drive train is improved in a low rotational speed range of the electric motor (9), wherein the modules (2-i) of the voltage source (1) are switched by means of a switching network (3) which is composed of controllable power switches (5) and can be actuated by control signals which are generated by a switching controller (4) in dependence upon the rotational speed (n) of the electric motor (9).

Abstract: Device for contacting electrical energy storage cells of an energy store, which are each connected at their poles to a printed circuit board via an electrically and thermally conductive contact element, said printed circuit board being provided to separate an electrical current, received by the respective energy storage cell via the contact element, from a heat flow received via the contact element.

Abstract: Device and method for dynamically adjusting an operating voltage for an electric motor (9), which voltage is provided by a voltage source (1) formed in a modular manner, wherein modules (2-i) of the voltage source (1) formed in a modular manner are switched in dependence upon a rotational speed (n) of the electric motor (9) such that the overall degree of efficiency of the electric drive train is improved in a low rotational speed range of the electric motor (9), wherein the modules (2-i) of the voltage source (1) are switched by means of a switching network (3) which is composed of controllable power switches (5) and can be actuated by control signals which are generated by a switching controller (4) in dependence upon the rotational speed (n) of the electric motor (9).

Abstract: Device for contacting electrical energy storage cells of an energy store, which are each connected at their poles to a printed circuit board via an electrically and thermally conductive contact element, said printed circuit board being provided to separate an electrical current, received by the respective energy storage cell via the contact element, from a heat flow received via the contact element.