Abstract: In order to realize the delivery of fuel cell hydrogen in advance, a liquid driven compressor is used in the hydrogen filling station to boost the high-purity hydrogen into vehicles. The application comparison and analysis with the diaphragm compressor commonly used in hydrogen filling stations show that the liquid driven compressor has the advantages of structurally preventing hydrogen from being polluted, starting and stopping at any time, ready to use, low wear and low noise, etc. Compared with diaphragm compressors, the application of liquid driven compressors can reduce investment by about 20% and reduce filling energy consumption by 10%~30%. It has the advantages of site adaptability and strong competitiveness. This paper puts forward some suggestions for model improvement and development potential which can be used for the development of 2 000 m³/h (normal condition) large displacement model and the flow control of start-up conditions and can improve the technology in further energy saving and consumption reduction.

Key words: compressor, structure, hydrogen, filling, advantages