Airtightness checking and weighing acid filling machine for medium-density battery

The utility model discloses an airtight checking and weighing acid filling machine for medium-density batteries, which relates to the technical field of battery acid filling devices and comprises a frame, a first conveying component, an acid filling unit, a battery output line and a second conveying component. The three stations are respectively a feeding station, a waiting station, an air tightness detection station, a first defective product recovery station and a two-dimensional code identification station; the first conveying assembly is arranged on the rack and moves a battery by one station at a time; the feeding end of the acid filling unit is connected with the two-dimensional code recognition station, the acid filling unit is provided with an acid filling station, and the acid filling station is provided with a weighing device; the feeding end of the battery output line is connected with the discharging end of the acid filling unit; the second conveying assembly is arranged on the acid injection unit