Online gas tightness detection device and method for fuel cell stack

Abstract

The invention discloses an online gas tightness detection device and method for a fuel cell stack. The online gas tightness detection device for the fuel cell stack comprises a pressure gauge, a gas tightness portable test box and a gas leakage speed test meter, wherein a pipe is arranged in the gas tightness portable test box, a required control valve is arranged on the pipe, and the pipe and the control valve can be matched to perform gas tightness detection on the fuel cell stack by testing gas. The online gas tightness detection device for the fuel cell stack is reasonable in structure and easy to operate. By means of the online gas tightness detection method for the fuel cell stack, work efficiency and economic benefit can be increased effectively, gas tightness detection operation is simplified greatly, and efficient and reasonable detection on the fuel cell stack can be achieved.

Description

technical field [0001] The invention relates to a fuel cell stack test device, in particular to an online air tightness detection device for a fuel cell stack. Background technique [0002] At present, the proton exchange membrane fuel cell (PEMFC) is a power generation device that directly utilizes hydrogen energy. PEMFC directly converts the chemical energy stored in hydrogen fuel and oxidant into electrical energy, with high energy conversion efficiency; the fuel cell is environmentally friendly and the only emission The thing is water. Therefore, fuel cell technology is considered to be the preferred clean and efficient power generation technology in the 21st century. [0003] A typical proton exchange membrane fuel cell stack usually includes: (1) diversion inlets and diversion channels for fuel and oxidant gas, and fuel (such as hydrogen, methanol or hydrogen-rich gas obtained by reforming methanol, natural gas, gasoline) and oxidant (mainly oxygen or air) are evenly...

AI Technical Summary

Problems solved by technology

[0006] 1. Disassemble the fuel cell to find the leak point. This work is very time-consuming and directly reduces work efficiency;

[0007] 2. The original seal is set on the bipolar plate. Although the seal originally had adhesive on the surface of the sealing groove on the bipolar plate, the seal has been fastened to the end face of some sealing areas of the membrane electrode for a long time. After a large adhesion force is generated, when the battery stack is disassembled to separate the bipolar plate from the membrane electrode, the seal is often torn off and deformed, which not only makes it impossible to reassemble, but also cannot be repeated after the seal is deformed. Use, resulting in economic losses (the cost of the formed seal is very high);

[0008] 3. The traditional air tightness test only uses several pipelines to continuously plug and unplug the fuel cell stack according to different test items. Not only are these pipelines messy, but also the operation process is cumbersome, which directly reduces work efficiency

Images