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实验研究水平衡对空冷型质子交换膜电池(PEMFC)电堆单电池电压均匀性的影响,并提出阳极流道液态水累积概念。基于对单个排气周期的分析,建立累积水量模型。针对不同负载和排气周期对自制的空冷型PEMFC开展了实验。研究结果表明:在低负载下,调整排气周期对单电池性能影响不大,随着负载的增加,单电池性能对尾气排放周期更加敏感,各单电池电压差异扩大,甚至部分单电池电压大幅降低。该研究提出一种基于单电池电压巡检系统的水淹故障诊断方法,为燃料电池的进一步优化控制奠定基础。
The effect of water balance on the voltage uniformity of PEMFC cells was experimentally studied and the concept of liquid water accumulation in the anode channels was proposed. Based on the analysis of a single exhaust cycle, a cumulative water volume model was established. Experiments were conducted on self-made air-cooled PEMFCs for different load and exhaust cycles. The results show that under low load, adjusting the exhaust cycle has little effect on the performance of the single cell. With the increase of the load, the single cell performance is more sensitive to the exhaust emission cycle, the voltage difference of each single cell is widened, reduce. This research proposes a water flooding fault diagnosis method based on the single battery voltage inspection system, which lays the foundation for further optimizing control of the fuel cell.