Defect detection method for membrane electrode of fuel cell

Abstract

The invention relates to a defect detection method for a membrane electrode of a fuel cell, which mainly comprises the following steps of S1, mounting a membrane electrode to be detected on a detection device, introducing hydrogen into an anode of the membrane electrode to be detected, and introducing air or oxygen into a cathode of the membrane electrode to be detected, so that the membrane electrode to be detected is in a power generation state, wherein the voltage of the membrane electrode to be measured is an open-circuit voltage; S2, keeping the ventilation state for a first set time, andif the voltage of the membrane electrode to be detected fluctuates, judging that the membrane electrode to be detected has defects; if the voltage of the membrane electrode to be detected does not fluctuate, carrying out the step S3; and S3, stopping introducing air or oxygen into the cathode of the to-be-detected membrane electrode, continuously introducing hydrogen into the anode of the to-be-detected membrane electrode for a second set time, and judging whether the to-be-detected membrane electrode is qualified or not according to the voltage of the to-be-detected membrane electrode. According to the detection method, whether the membrane electrode has defects or not can be detected before the fuel cell stack is assembled, so that the fuel cell stack is prevented from being repeatedlydisassembled and assembled.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for detecting defects of fuel cell membrane electrodes. Background technique [0002] In today's era of global energy shortage, it is imperative to find new energy as a substitute for fossil fuels. A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. It is the fourth power generation technology after hydroelectric power, thermal power and atomic power. It is also the only power device with pollution-free, high-efficiency, wide application, no noise and continuous work. High-efficiency and clean power generation technology with development prospects. The biggest feature of the fuel cell is that the reaction process does not involve combustion, and the energy conversion is not limited by the Carnot cycle, so the energy conversion rate is as high as 60-80%, and the actual...

AI Technical Summary

Problems solved by technology

However, due to reasons such as gaskets and membrane electrode frames, it is easy to cause misalignment of the membrane electrodes, which reduces the overall performance of the fuel cell stack, and at the same time, repeated disassembly and assembly reduces the working efficiency.

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