A real-time detection system and method for fuel cell internal performance

Abstract

The invention relates to a fuel cell detection system and method. The system includes a computer, a partition performance detection PCB board, a signal amplification module, a data acquisition module and a general interface bus. The computer detects, calculates and records the partition performance detection PCB board through the general interface bus. The measured data is processed into a two-dimensional distribution image according to the algorithm. Compared with the prior art, the present invention establishes an in-situ diagnostic system for studying the non-uniform electrochemical reaction on the active region of the fuel cell membrane electrode, and realizes simultaneous measurement of the fuel cell current density and local temperature distribution without interfering with the reaction process , to overcome the traditional defects of no two-dimensional visualization image, for the fault diagnosis of each local area of ​​the fuel cell, to understand the dynamic response law and electrochemical reaction mechanism of the fuel cell, to study the durability, decay law and life prediction of the vehicle-mounted fuel cell. theoretical and practical value.

Description

Technical field [0001] The invention relates to a fuel cell detection system and method, in particular to a non-interference real-time detection system and method of the internal performance of a fuel cell. Background technique [0002] With the development of the fuel cell business and the advancement of its commercialization requirements, how to improve the life and reliability of fuel cells has become a major key that must be overcome. The life and performance of the proton exchange membrane are affected by many factors, and the influence of these factors is directly reflected in the current density and temperature distribution inside the fuel cell. The current density distribution is a comprehensive manifestation of the distribution of reactants, temperature and water in a proton exchange membrane fuel cell. The uneven distribution of current density in the active area will produce differences in internal voltage and in-plane current, resulting in a decrease in the utilizati...

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Problems solved by technology

[0004] In view of the fact that most of the existing methods can only measure the overall output performance of the fuel cell power supply, it is impossible to know the real-time internal current density distribution and temperature distribution, and the reference value is limited

However, the detection of the current density distribution and temperature distribution of the internal partitions of the fuel cell is still a field that is rarely involved. Even if the "Fuel Cell Internal Current Density Distribution Measurement Gasket" (Patent No.: CN200510041871.9) invented by Guo Liejin et al. The partition current is led to the external circuit through the ribs of the current density distribution measuring gasket that completely coincides with the ribs of the flow field plate, and then measured. This method can only obtain the one-dimensional comprehensive current distribution inside the fuel cell. The obtained data It is not comprehensive enough and does not use the method of drawing two-dimensional images, so it cannot intuitively and real-time display the two-dimensional current density distribution and temperature distribution inside the fuel cell, and it is not easy to understand and examine some regular characteristics of the fuel cell

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