Lithium battery liquid injection machine and liquid injection mechanism

The lithium battery liquid injection machine comprises a base and a to-be-injected battery arranged on the top of the base, a liquid injection pipe used for liquid injection is arranged on the top of the battery, and a sealing disc is arranged at the bottom end of the outer side of the liquid injection pipe in a sliding mode; a sealing belt is arranged at the top of the sealing disc, and an opening in the top end of the sealing belt penetrates through a gap between the liquid injection pipe and the sealing disc and extends upwards along the outer side face of the liquid injection pipe; the sealing tape and the connecting ring at the bottom end of the sealing tape are gradually contracted inwards by tensioning the sealing tape, when the bottom end of the liquid injection pipe is contained in the through hole of the sealing disc, the connecting ring on the outer side of the sealing tape is contracted to the opening of the bottom end of the liquid injection pipe and makes contact with the opening of the bottom e