SYSTEM FOR AUTO-EXCHANGING OF ELECTRIC VEHICLE BATTERY

Disclosed is 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 including 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; and 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 nearly discharged battery, which is mounted on the battery mounting recess of an electric vehicle, is easily exchanged with one of fully-charged batteries stored on a loader, which is installed on a bus stop, for example, within a short period of time, thereby substantially improving efficiency.