US Patent 9070923 Attach and detach device of battery for electric vehicle

Disclosed is an electric vehicle battery attaching/detaching device including a battery having incision recesses formed on lateral portions, respectively, each incision recess having a lower engaging ledge; a battery mounting unit adapted to detachably mount the battery, the battery mounting unit having grasping holders formed on a bottom portion and adapted to engage with or disengage from the lower engaging ledges of the battery incision recesses; and a controller adapted to rotate the grasping holders in response to an electric signal so that the grasping holders engage with or disengage from the lower engaging ledges of the battery incision recesses.