Device and method for controlling air flow in air path of hydrogen fuel cell

Abstract

The invention discloses a hydrogen fuel cell air path air flow control device and method. The device comprises a chemical air filter, an electric air compressor, a silencer, an intercooler, a humidifier and an electronic throttle valve which are connected in sequence. The method comprises the following steps of: sending a set rotating speed signal to a compressor controller based on a model control module according to a set fresh air amount and a mass correction coefficient of an I integral module, enabling the compressor controller to send a compressor rotating speed signal to an air inlet system according to the set rotating speed signal, enabling the air inlet system to work according to the compressor rotating speed signal and measure the actual air inlet amount of the air inlet system, and enabling the I integral module to update the mass correction coefficient according to the set fresh air amount and the actual air inlet amount. The device and the method have the advantages thatthe coupling influence of a multiple-input-multiple-output system can be effectively counteracted, the responsiveness and the stability of air flow control are improved, then the power output responsiveness of the fuel cell is improved, the service life of the fuel cell is prolonged, and the control robustness is improved.

Description

Technical field[0001]The invention belongs to the technical field of hydrogen fuel cells, and in particular relates to a hydrogen fuel cell air path air flow control device and method.Background technique[0002]Existing fuel cell commercialization control technologies are in the exploratory stage. Air flow control usually adopts traditional PID control, or PID control is the main method combined with table look-up feedforward control based on working conditions. These two types of control are usually used. In a single input and output control system.[0003]Existing flow control schemes cannot be effectively implemented in multiple input and multiple output systems, especially in the case of pressure and flow combined adjustment, coupling control will make it difficult for flow and pressure control to reach a steady state, so multiple input and multiple output systems It is difficult to use ordinary PID methods for effective and stable control during control.[0004]The main disadvantage...

AI Technical Summary

Problems solved by technology

[0005] 1. In the multi-input and multi-output system, the PID control often has a coupling situation. When the PID control is implemented in the flow control and pressure control of the air system, it is easy to have a coupling control situation. Therefore, under the coupling control condition, the flow and pressure will be controlled. fluctuating, difficult to achieve stability

[0006] 2. The combination of table lookup feedforward control and PID control in basic working conditions is greatly affected by boundary conditions and physical characteristics. The combination of table lookup feedforward control and PID control in basic working conditions sometimes has a longer response time

[0007] 3. In order to effectively eliminate the coupling and meet the stable control under various conditions, ordinary PID control must design multiple sets of P and I parameters to meet the control of multiple conditions and multiple conditions, so the calibration workload is relatively large

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