Sealing property detection device of water cavity of bipolar plate of fuel cell, and detection method thereof

Abstract

The invention discloses a sealing property detection device of a water cavity of a bipolar plate of a fuel cell, and a detection method thereof. The device comprises a gas source, a pressure stabilizing valve, a pressure gauge, an anode cavity valve, a cathode cavity valve, a press rotating handle, a press upper die, a water cavity valve, a test upper end plate, a first membrane electrode, a measured polar plate, a second membrane electrode, a voltmeter, a test lower end plate and a press lower die; and during the detection, the anode cavity valve, the cathode cavity valve and the water cavityvalve are closed, the valve of the pressure stabilizing valve is opened, the pressure range is adjusted to 0.05-0.2MPa, after the reading of the voltmeter is stable, the reading of the voltmeter is observed, and if an absolute value of the voltage is higher than 0.1V, it is deemed that leakage exists. The sealing property detection device disclosed by the invention utilizes a voltage signal as the judgment of the gas tightness, the sensitivity is high, the detection speed is high, the signal is collected easily, automatic operation is realized, and it is conducive to improving the productiondetection efficiency.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell bipolar plate water chamber sealing performance detection device and a detection method thereof. Background technique [0002] Fuel cell is a power generation device that directly converts chemical energy in fuel and oxidant into electrical energy. It is a clean energy conversion method. Among them, proton exchange membrane fuel cell uses hydrogen as fuel, which has high energy conversion efficiency and low operating temperature. , fast start-up, clean and pollution-free, etc., have broad application prospects in transportation, distributed power generation and other fields. Proton exchange membrane fuel cell technology is considered to be the preferred clean and efficient power generation technology in the 21st century. [0003] For proton exchange membrane fuel cells used in vehicles, since the high heat dissipation power of fuel cells requires coolant to dissipa...

AI Technical Summary

Problems solved by technology

The above techniques can quantitatively test the leakage, but because the leakage of the water chamber of the bipolar plate is small, usually the leakage of a single bipolar plate is much lower than 0.1m l / min, so a higher requirement is proposed for the flowmeter Accuracy requirements, while using the flowmeter test, the test time is longer and the production efficiency is lower

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