Vehicle-mounted gas cylinder initial pressure measuring device and method for hydrogen refueling station

Abstract

The invention discloses a vehicle-mounted gas cylinder initial pressure measuring device and method for a hydrogen refueling station. The measuring device comprises a hydrogen source, an inlet pneumatic valve, an outlet pneumatic valve, pressure sensors and a hydrogen refueling gun; the hydrogen source is connected with the hydrogen refueling gun through a pipeline A; the hydrogen refueling gun isused for being connected with a vehicle-mounted gas cylinder of a vehicle to be filled with hydrogen; the inlet pneumatic valve and the outlet pneumatic valve are both installed on the pipeline A, the inlet pneumatic valve is close to the side where the hydrogen source is located, and the outlet pneumatic valve is close to the side where the hydrogen refueling gun is located; the pressure sensorsare installed on the pipeline A and located between the inlet pneumatic valve and the outlet pneumatic valve; and the pressure sensors are used for measuring the air pressure in the pipeline A. According to the vehicle-mounted gas cylinder initial pressure measuring device and method, safety guarantee can be provided for filling of the hydrogen fuel cell vehicle, and the filling speed is increased.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation station filling process monitoring and safety protection, and in particular relates to a device and method for measuring the initial pressure of a vehicle-mounted gas cylinder used in a hydrogenation station. Background technique [0002] In order to solve the problems caused by the energy crisis and environmental pollution, fuel cell vehicles powered by hydrogen are developing rapidly and industrialized, and all countries in the world attach great importance to the construction of hydrogen refueling stations. [0003] Most of the hydrogen refueling stations under construction and in use currently adopt a design scheme with a hydrogen refueling capacity of 35MPa or 70MPa. According to the requirements of GB / T 31138-2014, a hydrogenation machine with a rated working pressure of 70MPa should be equipped with a standard communication interface that can be connected to the car, so that the press...

AI Technical Summary

Problems solved by technology

At the same time, if the initial pressure of the gas cylinder is too low, there will also be a certain risk of over-temperature and over-pressure, and the initial pressure detection is very necessary

[0004] During the hydrogenation process of the vehicle at the current hydrogenation station, if the vehicle-mounted gas cylinder does not have a station-to-vehicle communication device, the staff can only rely on the staff to manually judge whether the pressure of the vehicle-mounted gas cylinder is too low, and before hydrogenation, it is necessary to manually Input the initial pressure, or carry out hydrogenation at a conservative filling speed to ensure that there will be no overheating and overpressure during the filling process, which will not only increase the working pressure of the staff, but also slow down the hydrogenation speed and affect the hydrogen fuel cell Car promotion and application

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