Online test system and method for alternating-current impedances of fuel cell zones

Abstract

The invention relates to an online test system and method for alternating-current impedances of fuel cell zones. The test system comprises a printed circuit board, a load circuit, a sine signal generation circuit, a data acquisition module and a data processing module, wherein the printed circuit board instead of an anode plate is mounted on a fuel cell; the load circuit and the sine signal generation circuit are both connected with the printed circuit board; the two ends of the data acquisition module are connected with the load circuit and the sine signal generation circuit respectively; and the data processing module is connected with the data acquisition module. The test method comprises the steps as follows: dividing the fuel cell into a plurality of zones by the printed circuit board; applying sinusoidal perturbations to the zones of the fuel cell by the sine signal generation circuit; acquiring the impedance frequency response signals of the zones in real time by the data acquisition module; and calculating by the data processing module to obtain the alternating-current impedances of the zones. Compared with the prior art, the test system and method have the advantages of capability of testing the alternating-current impedances of the fuel cell zones, wide test frequency range and the like.

Description

technical field [0001] The invention relates to a performance detection system and method of a fuel cell, in particular to an on-line test system and a test method for the AC impedance of a fuel cell partition. Background technique [0002] Fuel Cell (Fuel Cell) is a power generation device that directly converts the chemical energy present in fuel and oxidant into electrical energy. It is not limited by the Carnot cycle and has high energy conversion efficiency, no pollution, low noise, and strong building blocks. , High specific power advantages. Water management and heat management in fuel cells are closely related and coupled, and effective water and heat management plays a key role in improving the performance and life of the battery. Analyzing the AC impedance in different regions helps to study the water and heat distribution in different regions inside the fuel cell. Therefore, designing a system for testing the AC impedance of different regions inside the fuel cel...

AI Technical Summary

Problems solved by technology

[0010] The current published patents and papers have not yet seen the content of the AC impedance test of the fuel cell partition. The existing literature is mainly about the test of the overall AC impedance of the fuel cell.

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