A coupling device comprising: a first connection module, and a second connection module releasably connectable to the first connection module; wherein the first connection module and the second connection module form a connector, wherein the coupling device is adapted to: apply a coupling force that creates a connection between the first connection module and the second connection module, and apply a decoupling force that releases the connection; wherein the decoupling force and the coupling force are applied by the first connection module to the second connection module, the decoupling force counteracts the coupling force, the coupling force is provided by a pneumatic, hydraulic, electric, or electromagnetic actuator provided on the first connection module, the decoupling force is provided by a mechanical, electrostatic, or magnetic storage device capable of receiving, storing, and releasing a portion of the energy generated by the coupling force, the coupling force is provided by a coupling mechanism, and the decoupling force is provided by a decoupling mechanism, the decoupling mechanism forms a unit with the coupling mechanism, the second connection module has an engagement portion, the first connection module has an engagement unit cooperating with the engagement portion such that the engagement unit is movable between the following positions: an alignment position in which the second connection module is aligned with the first connection module and is removable from the first connection module, a locking position in which the second connection module is aligned with the first connection module and is prevented from being removed from the first connection module; and there is no connection for power transmission in the alignment position and in the locking position. a first connection module, and a second connection module releasably connectable to the first connection module; wherein the first connection module and the second connection module form a connector, wherein the coupling device is adapted to: apply a coupling force that creates a connection between the first connection module and the second connection module, and apply a decoupling force that releases the connection; wherein the decoupling force and the coupling force are applied by the first connection module to the second connection module, the decoupling force counteracts the coupling force, the coupling force is provided by a pneumatic, hydraulic, electric, or electromagnetic actuator provided on the first connection module, the decoupling force is provided by a mechanical, electrostatic, or magnetic storage device capable of receiving, storing, and releasing a portion of the energy generated by the coupling force, the coupling force is provided by a coupling mechanism, and the decoupling force is provided by a decoupling mechanism, the decoupling mechanism forms a unit with the coupling mechanism, the second connection module has an engagement portion, the first connection module has an engagement unit cooperating with the engagement portion such that the engagement unit is movable between the following positions: an alignment position in which the second connection module is aligned with the first connection module and is removable from the first connection module, a locking position in which the second connection module is aligned with the first connection module and is prevented from being removed from the first connection module; and there is no connection for power transmission in the alignment position and in the locking position. apply a coupling force that creates a connection between the first connection module and the second connection module, and apply a decoupling force that releases the connection; wherein the decoupling force and the coupling force are applied by the first connection module to the second connection module, the decoupling force counteracts the coupling force, the coupling force is provided by a pneumatic, hydraulic, electric, or electromagnetic actuator provided on the first connection module, the decoupling force is provided by a mechanical, electrostatic, or magnetic storage device capable of receiving, storing, and releasing a portion of the energy generated by the coupling force, the coupling force is provided by a coupling mechanism, and the decoupling force is provided by a decoupling mechanism, the decoupling mechanism forms a unit with the coupling mechanism, the second connection module has an engagement portion, the first connection module has an engagement unit cooperating with the engagement portion such that the engagement unit is movable between the following positions: an alignment position in which the second connection module is aligned with the first connection module and is removable from the first connection module, a locking position in which the second connection module is aligned with the first connection module and is prevented from being removed from the first connection module; and an alignment position in which the second connection module is aligned with the first connection module and is removable from the first connection module, a locking position in which the second connection module is aligned with the first connection module and is prevented from being removed from the first connection module; and there is no connection for power transmission in the alignment position and in the locking position.