Attach and detach device of battery for electric vehicle

An electric vehicle battery attaching/detaching device comprising:

• a battery mounting unit formed on an electric vehicle and adapted to detachably mount a battery;
• a loader having a plurality of battery stands, each battery stand being adapted to detachably mount a fully-charged battery to be exchanged with the battery mounted on the battery mounting unit;
• and
• a battery attaching/detaching unit adapted to move along X-axis, Y-axis, and Z-axis between the battery mounting unit and the battery stand by means of a movement device, detach a battery mounted on the battery mounting unit or the battery stand, and exchange and mount the battery on the battery stand or the battery mounting unit,
• wherein the battery has coupling holes formed near corners, upper surface incisions formed on both lateral portions, respectively, each upper surface incision having an engaging ledge formed at a predetermined height from a bottom portion, and lower surface incisions formed on front and rear portions, respectively, each lower surface incision having an engaging ledge formed at a predetermined height from a top portion.