Apparatus and method for measuring mass of hydrogen in vehicle-mounted hydrogen cylinder

Abstract

The invention relates to the field of measurement of hydrogen in a hydrogen cylinder, and provides an apparatus and method for measuring the mass of hydrogen in a vehicle-mounted hydrogen cylinder. The apparatus comprises a hydrogen source device, a pressure reducing device, a pressurizing device and a hydrogenation gun which are sequentially connected through a hydrogen supply pipeline; a mass flow meter is arranged between the pressure reducing device and the pressurizing device; a pressure gauge is arranged between the pressurizing device and the hydrogenation gun; and the hydrogenation gun is used for injecting hydrogen into a hydrogen cylinder to be measured. The apparatus further comprises a temperature sensor and an electric control device; the temperature sensor is arranged on the surface of the hydrogen cylinder to be measured; and the electric control device is connected with the temperature sensor. The apparatus can indirectly measure the pressure and the temperature in the hydrogen cylinder on the outer side of the hydrogen cylinder and further calculate the hydrogen consumption, is accurate and convenient in measurement, high in efficiency and convenient to move, is suitable for measuring various operation conditions of fuel cell vehicles of different vehicle types, and is flexible and convenient.

Description

technical field [0001] The invention relates to the field of measuring hydrogen in a hydrogen bottle, in particular to a measuring device and method for measuring the quality of hydrogen in a vehicle-mounted hydrogen bottle. Background technique [0002] As one of the important development directions of new energy vehicles in the future, fuel cell vehicles have been developing rapidly in China in recent years. Major OEMs are constantly pursuing the technological progress of fuel cell vehicles. Among them, hydrogen consumption is a key technical indicator for evaluating fuel cell vehicles. The key to the technical level of battery cars. [0003] SAE J2572 (2006) clearly stipulates three detection methods of hydrogen consumption: (1) the net mass change based on the volume of the fuel tank, the pressure and temperature of the internal gas, referred to as the temperature and pressure method; (2) the balance Weighing the net mass change based on the weight of the gas cylinder b...

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Problems solved by technology

[0004] As for the currently more commonly used temperature and pressure method, since the data of the temperature and pressure sensors in the on-board hydrogen bottle cannot be directly used during detection, and the vehicle is not allowed to move before and after the test, the hydrogen refueling station and skid-mounted hydrogen refueling Machines and other high-voltage measuring equipment are generally far away from the construction of the laboratory, which brings certain technical difficulties to the measurement method.

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