Hydrogen control system of hydrogen fuel cell automobile

Abstract

The invention discloses a hydrogen control system of a hydrogen fuel cell automobile. The hydrogen control system comprises a hydrogen inlet pressure sensor, an air inlet pressure sensor, a hydrogen spraying solenoid valve group and a system controller, wherein the hydrogen spraying solenoid valve group is used for introducing hydrogen to a positive inlet of a fuel cell stack module, the hydrogeninlet pressure sensor is arranged in a pipeline introducing the hydrogen into the positive inlet and is arranged between the hydrogen spraying solenoid valve group and the positive inlet, the air inlet pressure sensor is arranged in a pipeline introducing air into a negative electrode of the fuel cell stack module, and the system controller is connected with the hydrogen inlet pressure sensor, theair inlet pressure sensor and the hydrogen spraying solenoid valve group and is used for calculating pressure difference according to a first pressure signal sent from the hydrogen inlet pressure sensor and a second pressure signal sent from the air inlet pressure sensor and controlling and adjusting the opening frequency of the hydrogen spraying solenoid valve group according to the pressure different. The hydrogen demand quantity is adjusted in real time according to the pressure difference so as to form closed-loop control, the hydrogen control accuracy is improved, and the hydrogen utilization rate is improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a hydrogen gas control system for a hydrogen fuel cell vehicle. Background technique [0002] Fuel cell vehicle is a kind of electric vehicle. The energy of its battery is generated through the chemical action of hydrogen and oxygen. Its energy conversion efficiency can be as high as 60% to 70%. The actual efficiency is about twice that of ordinary internal combustion engines. The chemical reaction process of the fuel cell will not produce harmful products, so it is a real "zero emission, zero pollution" vehicle, and it is the inevitable direction of new energy and clean power vehicles in the future. The research and development and quantity of hydrogen fuel cell vehicles It will surely become a new revolution in the field of global automobile industry. [0003] The control of hydrogen is the control core of the electronic control system of hydrogen fuel cell vehicles....

AI Technical Summary

Problems solved by technology

This scheme has poor hydrogen supply control accuracy, large overshoot range, and large fluctuation range, resulting in low hydrogen utilization rate; in addition, reasonable control of hydrogen and air pressure difference is crucial to improving the output efficiency of fuel cell stacks and prolonging the service life of the stacks. An important step, this solution is difficult to control the hydrogen and oxygen pressure difference due to the response time and accuracy error of the opening valve

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