J0560204 磁気センサを用いた固体高分子形燃料電池における内部診断方法の検討

Abstract

The current distribution is an evaluation index of PEFC because non-uniform current distribution leads to low utilization of reactants and catalysts. Additionally, current distribution is affected by the reactant flow arrangement and operation conditions. Therefore, it is important to measure and evaluate the current distribution of PEFCs. Many methods to measure current distribution exist, but most modify components of the PEFC. For instance, a method may segment the flow field and measure current distribution using the printed circuit board and resistors network. In order to measure the current distribution of PEFC systems, which are typically stacked, the methods must be non-destructive. In order to realize a non-destructive current distribution measurement approach for use in PEFC stacks, we use some magnetic sensor probes. Here, we described the measurement system and the method using these proves. And current distribution in PEFC was evaluated in its operating condition. The study showed that the current distribution changes by air flow rates and relates the performance of PEFC.