Quick-change device for batteries of electric vehicle

The utility model discloses a quick-change device for batteries of an electric vehicle, which solves the problems that an existing locking device is complicated in structure, poor in locking effect and time-wasting and effort-wasting when a battery chamber is changed. The technical scheme is as follows: the quick-change device for the batteries of the electric vehicle comprises a battery chamber and a battery frame fixedly arranged on the electric vehicle, clamp slots are arranged at the side surfaces of the battery chamber, a bracket assembly is arranged on the battery frame and provided with lock tongue mechanisms that can be matched with the clamp slots for locking, each lock tongue mechanism consists of a rotating shaft movably sheathed on the bracket assembly, a rocker arm fixedly arranged on the rotating shaft, and a lock tongue arranged corresponding to one clamp slot, as well as a spring, wherein one end of the spring is connected with the rotating shaft, and the other end of the spring is connected with the bracket assembly; and the bracket assembly is connected with the upper end of a compression spring by a boss, a cross beam with the protruded end is arranged at the bottom surface of the battery chamber, a cylindrical ejector rod that can be sheathed in the compression spring is arranged at the end of the cross beam. The quick-change device for the batteries of the electric vehicle is simple in structure, good in locking effect, and simple and convenient as well as time-saving and effort-saving when the battery chamber is changed.