A fuel cell air system control method

Abstract

The invention provides a fuel cell air system control method, which belongs to the technical field of fuel cells. It solves the technical problems such as the low discharge rate of the water generated by the electrochemical reaction of the existing fuel cell stack. The fuel cell air system control method is characterized in that it includes obtaining the target inlet air flow rate FLref, the target air inlet pressure Pref and the target water content of the fuel cell stack according to the fuel cell stack output current I look-up table; according to the target water content and the actual water content Content difference, execute the air pressure adjustment algorithm, air flow adjustment algorithm, and correct the target inlet air flow and target air inlet pressure. The invention has the advantages of high discharge speed of the water generated by the electrochemical reaction of the fuel cell stack during the large-scale loading process.

Description

A kind of fuel cell air system control method technical field The invention belongs to the technical field of fuel cells, relate to a kind of control method, especially a kind of fuel cell air system system control method. Background technique Hydrogen proton exchange membrane fuel cells are widely used due to their high efficiency, no pollution, low operating temperature, low noise and other advantages. Used in the field of transportation, especially buses, logistics vehicles, heavy trucks, etc. The on-board fuel cell system must meet the According to the customer's requirements for the power performance of the whole vehicle, that is, the output power from idle speed is increased to the peak output power in a short time, then the fuel The fuel cell stack in a fuel cell system must ramp up from idle output current to peak output current in the same time, i.e. Amplitude loading. During the large loading process, the electrochemical reaction of the fuel cell stack ...

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Problems solved by technology

To meet the demand for rapid discharge of water generated by the electrochemical reaction of the fuel cell stack, it is necessary to increase the air flow rate at the inlet of the fuel cell stack and reduce the air pressure at the inlet of the fuel cell stack. Inlet air flow increases, as figure 1 The middle curve trajectory A→C→B violates the requirement of rapid discharge of water generated by the electrochemical reaction of the fuel cell stack

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