The utility model discloses
liquid injection equipment and a battery
production line, a battery is provided with a
liquid injection port, the
liquid injection equipment comprises a liquid injection mechanism and a liquid supply mechanism, the liquid injection mechanism comprises a liquid injection cup and a gas source
assembly, the liquid injection cup is provided with a first liquid injection
nozzle, a first liquid inlet and a ventilation port, and the first liquid injection
nozzle is in
butt joint with the liquid
injection port; the air source
assembly is used for controlling the air pressure in the liquid injection cup to be switched between
positive pressure and negative pressure through the air vent; the liquid supply mechanism comprises a buffer cup, a first valve body, a second liquid injection
nozzle and a liquid pumping
assembly, the buffer cup is provided with a liquid outlet and a second liquid inlet, the liquid pumping assembly is connected to the second liquid inlet, the first valve body is connected between the liquid outlet and the second liquid injection nozzle, and the second liquid injection nozzle is in
butt joint with the first liquid inlet. The first liquid inlet is blocked by the second liquid injection nozzle, and the liquid
injection port is blocked by the first liquid injection nozzle, so that the
air tightness of the liquid injection cup and the interior of the battery is ensured, vacuumizing and liquid pumping are synchronously carried out, the liquid injection efficiency is improved, a valve body does not need to be additionally arranged, and the maintenance cost is reduced.