Research on the Acquisition and Amplification of in-plane Signals of Proton Exchange Membrane Fuel Cell

The in-plane current density distribution measurement of the proton exchange membrane fuel cell (PEMFC) is significantly restricted by transmission loss and interference, which are mainly caused by weak voltage signals. This poses a great challenge to accurate measurement, as any inaccuracies could potentially affect the overall performance evaluation and optimization of the PEMFC. To effectively address this issue, a distributed signal amplification sensor is developed, making full use of printed circuit board (PCB) segmented measurement technology. This technology allows for a more precise and detailed measurement approach. The voltage drop across in-plane sampling resistors is amplified by amplifiers and then acquired by the acquisition device. A thorough analysis of the sensor's measurement accuracy is conducted, taking into account various factors such as environmental conditions and potential signal fluctuations. Furthermore, a specially designed collector structure ensures the proper installation of all components. It not only guarantees a seamless fit but also enhances the stability and reliability of the measurement system. This enables online measurement without disrupting the cell's internal structure, providing a promising solution for PEMFC measurement in this field.