Gas spring energy storage device

The invention discloses a gas spring energy storage device, and relates to the technical field of electric energy storage. The invention discloses a gas spring energy storage device. Comprising working medium gas, working medium liquid, a main gas tank, an auxiliary gas tank, a constant-pressure liquid tank, a normal-pressure liquid tank, a gas compressor, a hydraulic pump, a motor, a 1 # pressure sensor, a 2 # pressure sensor, a 3 # pressure sensor, a 1 # liquid conveying pipe, a 2 # liquid conveying pipe, a 3 # liquid conveying pipe, a 4 # liquid conveying pipe, a 5 # liquid conveying pipe, a 6 # liquid conveying pipe, a 1 # gas conveying pipe, a 2 # gas conveying pipe and a 3 # gas conveying pipe. The device comprises a first liquid control valve, a second liquid control valve, a first gas control valve and a second gas control valve. Electric energy is converted into compressed air potential energy to be stored through the hydraulic pump, and the stored compressed air potential energy is converted into el