Battery quick-change mechanism, battery assembly and vehicle

The invention provides a battery quick-change mechanism, a battery assembly and a vehicle, and belongs to the technical field of vehicle chassises. The battery quick-change mechanism comprises a battery bin, first pressing pieces, first shafts, elastic pieces and locking pieces, and an opening is formed in the side wall of the battery bin; the first pressing pieces are installed inside the batterybin through the first shafts, comprise first pressing arms and bearing push arms and are used for limiting movement of a battery in the first direction, when the battery is installed, the bearing push arms are pushed by the first end wall of the battery to rotate to the first position in the first rotary direction, and the first pressing arms press the side wall of the battery; the first ends ofthe elastic pieces are fixedly connected with the inner wall of the battery bin, and the second ends of the elastic pieces are fixedly connected with the first pressing pieces. By means of the batteryquick-change mechanism, th