Patent ID: 8825202

Claim:
A system for automatically exchanging a battery of an electric vehicle, an electric battery being mounted on a side of an upper portion of the vehicle, the system comprising: a horizontal frame of a predetermined area formed at a location higher than the electric vehicle; a plurality of battery stands formed on a bottom surface of the horizontal frame at a predetermined interval; a pair of fixed guide rails arranged and installed on front and rear sides or left and right sides of the horizontal frame, respectively; a variable guide rail adapted to move horizontally along X-axis or Y-axis along the fixed guide rails; a movable rail adapted to move horizontally along Y-axis or X-axis along the variable guide rail and ascend/descend vertically; a grasping means installed on a lower end of the movable rail and adapted to pick up a battery of the electric vehicle or a battery seated on the battery stand and exchange each other; a stop monitoring sensor unit adapted to sense whether the electric vehicle has stopped at a stop line or not; an image sensing device adapted to sense whether a battery mounting recess is positioned in a movement area of the movable rail when the electric vehicle stopped and sense in what range the battery mounting recess is positioned from an absolute position of the movable rail; and a control unit adapted to apply an operating signal to drive the variable guide rail and the movable rail, based on a sensing signal from the image sensing device, so that the grasping means of the movable rail is positioned on an identical vertical line with the battery mounting recess.