Multifunctional online test system for large-area fuel cell

Abstract

The invention relates to a multifunctional online test system for a large-area fuel cell. The system comprises a multifunctional measuring plate, a first data acquisition module, an excitation generator, a load circuit and a computer; the multifunctional measuring plate is mounted on a fuel cell as a cathode plate or an anode plate; the load circuit is connected with the multifunctional measuringplate and the other monopolar plate of the fuel cell corresponding to the multifunctional measuring plate; the excitation generator is connected between the multifunctional measuring plate and the monopole plate; the multifunctional measuring plate comprises a plurality of independent test subareas; each independent test subarea is provided with a plurality of sensor measuring holes, the sensors are connected with the first data acquisition module, polar plates of the independent test subareas are connected with the excitation generator and the load circuit, and the computer is connected withthe first data acquisition module and the excitation generator. Compared with the prior art, the test system has the advantages that the impedance, temperature and humidity, oxygen concentration and internal images of the subareas can be measured on line at the same time through only one device, operation is easy, and the application range is wide.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a multifunctional online testing system for large-area fuel cells. Background technique [0002] Energy is the driving force for the development and progress of human society, but traditional fossil fuels have caused many negative impacts on the environment. As a renewable and non-polluting clean energy, hydrogen fuel has gradually become an environmentally friendly new energy carrier in the 21st century, and it has a very good application prospect in fuel cells. Due to the advantages of high power density, high efficiency and zero emission, fuel cells have become a very promising energy supply device. [0003] A single fuel cell consists of two bipolar plates and a membrane electrode. It can be converted into electricity through the electrochemical reaction of hydrogen and oxygen. The reaction of the fuel cell is a kind of reaction carried out under the interaction of multiple field...

AI Technical Summary

Problems solved by technology

[0004] Chinese invention patent CN 103063714B discloses an on-line test system and method for AC impedance of fuel cell partitions. The impedance distribution inside the fuel cell is successfully obtained by using PCB board partitions. However, this method has a single function and only obtains the impedance distribution information of the fuel cell. , the measurement of multiple physical quantities cannot be realized, and the understanding of the internal environment of the fuel cell is very limited

Chinese invention patent CN 104597407A discloses a dual-function fuel cell partition impedance testing device and testing method, which uses a partition PCB board and a built-in temperature sensing resistor to measure the fuel cell partition impedance and temperature, but this method is due to the PCB The plate directly contacts the bipolar plate instead of the membrane electrode, which affects the measurement accuracy of the temperature distribution, and the shunt effect of the bipolar plate will distort the impedance signal collected by the measurement plate

The above two methods can realize the measurement of partition impedance and temperature, but the measurement parameters have large interference and low precision

Moreover, there are still few simultaneous measurements of multiple physical quantities such as internal impedance, temperature and humidity, and oxygen concentration of the fuel cell, which cannot reflect the reaction state inside the battery in real time, resulting in a lack of effective data support for fuel cell design and operation control.

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