Liquid injection mechanism for steel shell battery

The utility model discloses a steel shell battery liquid injection mechanism, which comprises a vacuum liquid injection box body, a buffer cup lifting plate and two groups of liquid injection needle servo modules, the upper end of the vacuum liquid injection box body is provided with two mounting side plates which are correspondingly arranged, the two ends of the buffer cup lifting plate are respectively connected on the mounting side plates through a sliding rail and a sliding block, and the two ends of the buffer cup lifting plate are respectively connected with the two groups of liquid injection needle servo modules. Wherein one mounting side plate is provided with a lifting drive for controlling the lifting of the buffer cup lifting plate, the two sides of the buffer cup lifting plate are provided with a plurality of buffer cups at intervals, the upper end of each buffer cup is provided with a cover plate, the cover plate is provided with a liquid inlet hole, and one side of the cover plate is movably con