Protective shell of battery pack module

The protective shell comprises a box body, a box cover and a lifting mechanism, a groove in the top end of the box body is a box groove, a cavity in the bottom of the box body is a water cavity, a plurality of protruding vertical pipelines are arranged on the front side wall and the rear side wall of the box body respectively, a top end opening of each pipeline is communicated with the box groove, and a bottom end opening of each pipeline is communicated with the water cavity; a handle is arranged in each of U-shaped notches in the upper left end and the upper right end of the box cover, the two ends of each handle are hinged to the box cover, and the box cover is arranged at the top end of the box body. The lifting mechanism structurally comprises a base, a two-way lead screw and two supporting rods, and the base is arranged in the box groove; the two-way screw rod is rotationally connected to the bottom of the box groove, and the left half section and the right half section of reverse threads of the two-way