Method and device for obtaining attenuation trend of proton exchange membrane fuel cell

Abstract

The invention discloses a method and device for obtaining the attenuation trend of a proton exchange membrane fuel cell. The method for obtaining the attenuation trend of the proton exchange membrane fuel cell comprises the step that whether the proton exchange membrane fuel cell tends or not is judged by detecting target gas in tail gas. Compared with the mode of judging the attenuation trend through the voltage difference between the initial polarization curve and the current polarization curve in the prior art, the attenuation of the proton exchange membrane fuel cell can be quickly judged once the content of the target gas in the tail gas reaches a certain value; Meanwhile, the attenuation trend of the proton exchange membrane fuel cell is converted into the content of the passing target gas, and rapid judgment of the attenuation trend of the proton exchange membrane fuel cell is achieved.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, in particular to a method and device for obtaining the decay trend of a proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cells have many advantages such as cleanliness and high efficiency, so they are gradually developed and applied in hydrogen energy vehicles. Nevertheless, PEM fuel cells still have many problems and challenges, including PEM fuel cell fault diagnosis, life prediction and decay trend determination. [0003] Proton exchange membrane fuel cells are composed of multiple repetitive components (including membranes, catalytic layers, gas diffusion layers, bipolar plates and seals), and the internal working environment is very harsh (strong acid, high potential, high humidity and high temperature, etc. ), so the performance of the proton exchange membrane fuel cell cannot be avoided. If it is not discovered in time, it will cau...

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Problems solved by technology

[0003] Proton exchange membrane fuel cells are composed of multiple repeating components (including membranes, catalytic layers, gas diffusion layers, bipolar plates, and seals), and the internal working environment is very harsh (strong acidity, high potential, high humidity, high temperature, etc. ), so there is an unavoidable attenuation of the performance of the proton exchange membrane fuel cell.

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