Top cover assembling device and battery production system

The utility model relates to a top cover assembling device and a battery production system, and the top cover assembling device comprises a supporting mechanism which comprises a bearing seat for bearing a shell; the positioning assembly comprises a positioning block and a first driving part, and the first driving part can drive the positioning block to ascend and descend relative to the bearing seat so that the positioning block can be separated from or abut against the top face of the shell; and the press-fitting assembly comprises a pressing and holding piece and a second driving piece, and the second driving piece can drive the pressing and holding piece to move in the direction close to the bearing base so that the pressing and holding piece can press the top cover into the shell. According to the top cover assembling device, through cooperative arrangement of the supporting mechanism, the positioning assembly and the press-fitting assembly, the press-fitting strength of the top cover can be accurately controlled, the press-fitting time of the top cover can be accurately shortened, good press-fitting consistency is achieved, the press-fitting quality of the top cover is improved, the battery top cover can be accurately pressed to a battery shell, and the battery shell can be conveniently assembled. And the assembling efficiency of the battery top cover and the battery shell is effectively improved.