Hydrogen circulation testing system of fully-automatic high-pressure hydrogen cylinder and testing method

Abstract

The invention provides a hydrogen circulation testing system of a fully-automatic high-pressure hydrogen cylinder and a testing method. The system comprises a temperature tank, a high-pressure container and a tested hydrogen cylinder, wherein the high-pressure container is placed inside the temperature tank; the tested hydrogen cylinder is placed inside the high-pressure container; the tested hydrogen cylinder is connected with a hydrogen pressure unit; a liquid inlet and a liquid outlet are formed in the high-pressure container; the high-pressure container is connected with a liquid pressurecirculation unit through the liquid inlet and the liquid outlet; and pressure circulation testing on the tested hydrogen cylinder is achieved according to pressure difference change of hydrogen insidethe tested hydrogen cylinder and liquid outside of the tested hydrogen cylinder. By adopting the system, hydrogen inside the high-pressure hydrogen cylinder is pressurized, liquid pressure circulation is exerted outside the hydrogen cylinder, pressure circulation on the high-pressure hydrogen cylinder is implemented according to the pressure difference change of the hydrogen inside the tested hydrogen cylinder and the liquid outside of the tested hydrogen cylinder, and the pressure circulation testing on the high-pressure hydrogen cylinder at different temperature is also implemented, so thatthe testing cost is reduced, and the testing security is improved.

Description

technical field [0001] The invention mainly relates to the technical field of inspection equipment, in particular to a fully automatic high-pressure hydrogen cylinder hydrogen circulation test system and test method. Background technique [0002] With the development trend of new energy vehicles becoming increasingly strong in recent years, fuel cell vehicles have also received more and more attention. With the rapid development of the hydrogen fuel cell industry, the pressure requirements for the use of hydrogen cylinders are also getting higher and higher. The hydrogen cylinders used in the existing fuel cell systems generally adopt aluminum liner carbon fiber fully wound gas cylinders and plastic liner carbon fiber fully wound gas cylinders. The hydrogen storage pressure can reach 70MPa. The design life of the hydrogen cylinder is very long. In order to investigate the overall safety performance of the filled pressure vessel, it is necessary to use the hydrogen pressure c...

AI Technical Summary

Problems solved by technology

The existing test method is to use hydrogen as the medium for the pressure cycle test, pressurize the hydrogen into the test device, keep the pressure for a period of time, and then release the pressure. As a pressure cycle, the released hydrogen will be recovered and recycled. The entire test The device requires a complicated and huge system, the test cost is very high, and the entire test system also has to withstand the impact of pressure, the system itself has many leakage points, and there is a great potential safety hazard

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