Abstract: As one of the core subsystems of fuel cell vehicles, the on-board hydrogen system, once subjected to a large extrusion pressure in traffic accidents, may lead to the failure of key components, resulting in a large amount of hydrogen leakage, which may lead to more serious consequences, so the evaluation of the extrusion resistance of the on-board hydrogen storage cylinders is an important task to further improve the safety evaluation system of fuel cell vehicles. This paper establishes a squeeze evaluation method for on-board hydrogen storage cylinders, describes in detail the four aspects of the squeeze evaluation method, and carries out the squeeze test verification of on-board hydrogen storage cylinders, analyzes the impact of squeezing on the hydrogen storage cylinders through the test data, and quantitatively evaluates and analyzes the safety of the hydrogen storage cylinders after squeezing, so as to provide a reference for the safety evaluation of the on-board hydrogen system.

Key words: fuel cell vehicle, hydrogen storage cylinder, extrusion, experimental study, safety