Method for calculating residual hydrogen of fuel cell hydrogen system

Abstract

The invention provides a method for calculating residual hydrogen of a fuel cell hydrogen system. The method comprises the steps of: setting a moment count value as 1; obtaining respective temperatures in all the n hydrogen storage cylinders of the fuel cell hydrogen system and pipeline pressures in pipelines connected with a hydrogen storage component and s hydrogen supply component; determiningwhether the current moment count value is larger than 1 or not, and if yes, obtaining the pressure prediction variance and the pressure prediction value at the last moment, and calculating a gain coefficient; calculating a correction pressure and the mass of the residual hydrogen in each hydrogen storage cylinder; calculating the pressure prediction variance and the pressure prediction value at the current moment; and adding 1 to the moment count value, and recording the pressure prediction variance and the pressure prediction value at this moment. The method has the advantages that: the errorof the data of the pressure sensor of the hydrogen system is corrected by adopting a statistical online iterative calculation method, so that the calculation precision of the hydrogen residual mass of the hydrogen system of the fuel cell is improved.

Description

technical field [0001] The invention relates to a calculation method, in particular to a calculation method for remaining hydrogen in a fuel cell hydrogen system. Background technique [0002] Hydrogen fuel cell vehicle technology is becoming more and more mature. As a new energy vehicle with zero pollution and zero emissions, hydrogen fuel cell vehicles have increasingly entered the transportation system and have been widely recognized by the public. Fuel cell vehicles use hydrogen as fuel, and through the fuel engine, chemical energy is efficiently converted into electrical energy to drive the vehicle. The whole process only discharges pure water, so it is the most ideal energy-saving, environmentally friendly and zero-emission vehicle to replace traditional fossil fuel vehicles in the near future Transportation. [0003] The remaining hydrogen mass of the hydrogen system means the remaining mileage of the hydrogen fuel cell vehicle. The difference between the rated hydro...

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Problems solved by technology

[0004] The existing technology uses the hydrogen pressure and temperature in the hydrogen system to calculate the remaining hydrogen quality. However, when the hydrogen system is installed on a vehicle, the electromagnetic environment and noise are harsh, which has a great impact on the pressure and temperature sensor signals collected by the sensor. The temperature range of the hydrogen system It is from -30°C to 80°C or wider, the pressure range of the hydrogen system is 0-70MPa or wider, the temperature sensor has low precision, and the pressure sensor has low precision, which limits the calculation accuracy of the remaining hydrogen mass in the hydrogen system

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