Loading control method for power generation system of automobile fuel cell

Abstract

The invention provides a loading and deloading control method for a power generation system of an automobile fuel cell. The method comprises the following steps of: during loading, setting a maximum power gain sigma(x), comparing the maximum power gain sigma(x) with a difference value delta(P) between the power P(whole automobile) required by a whole automobile and the loading power P of the conventional fuel cell to determine a loading amount, and calculating the allowable power P(allowable) to be output by the power generation system of the fuel cell; adjusting corresponding parameters of the power generation system of the fuel cell according to the calculated allowable loading power P(allowable); after the adjustment is finished, returning a finish signal, repeatedly and cyclically loading until the power P(whole automobile) is equal to the power P(allowable), and cyclically loading repeatedly until the power P(allowable) is equal to the power P(whole automobile); during deloading, directly deloading; and after finishing the deloading, adjusting the parameters of the power generation system of the fuel cell. The method has the advantages that: by continuously loading according to low gain, the damage of gas insufficiency, antipole and the like to membrane electrodes, which are caused by low mass transfer because of high-speed large load loading, is reduced; and the service life of the power generation system of the fuel cell is prolonged.

Description

technical field [0001] The present invention relates to a method or device for the direct conversion of chemical energy into electrical energy by patent number H01 basic electrical component H01M, such as a battery pack H01M8 / 00 fuel cell; and its manufacturing H01M8 / 04 auxiliary device or method, such as for pressure control, for fluid circulation. Background technique [0002] The loading and discharging process of the vehicle proton exchange membrane fuel cell power generation system is a chemical reaction process, which requires a certain amount of material reaction to support the output. The electrochemical reaction speed is extremely fast, which requires that the material transfer speed must be fast to keep up with the reaction speed so that the reaction can continue. As far as the current fuel cell power generation system is concerned, the air supply system and the hydrogen supply system are realized by mechanical means. The mass transfer speed of the mass method is...

AI Technical Summary

Problems solved by technology

As far as the current fuel cell power generation system is concerned, the air supply system and the hydrogen supply system are realized by mechanical means. The mass transfer speed of the mass method is very slow. Of course, power generation cannot be generated if there is a lack of reactants. At this time, if the load is forced, the lack of reactants will cause the fuel cell to be undergassed. The undergassing will cause the electrode catalysts of the proton exchange membrane fuel cell to gather The surface activity decreases, which reduces the performance and life of the fuel cell. At the same time, the polarity of the fuel cell electrode may change and damage the membrane electrode.

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