Liquid injection device for production of soft package polymer lithium battery

The utility model discloses a liquid injection device for producing a soft package polymer lithium battery, which comprises a device base, an equipment supporting plate is fixedly arranged on the outer side of the device base through bolts, rectangular sliding grooves b are formed in the left side and the right side of the equipment supporting plate, a liquid injection supporting plate is connected to outer side sliding blocks of the rectangular sliding grooves b, and a storage tank body is fixed on the upper surface of the liquid injection supporting plate through bolts. A protective sleeve is connected right above the storage tank body in a nesting manner, the other end of the protective sleeve is in threaded connection with a vacuum liquid injection head, the device further comprises a battery supporting plate, hydraulic oil cylinders are arranged on the left side and the right side of the liquid injection supporting plate, a bolt is fixed right above the liquid injection supporting plate, a hydraulic rod