PEMFC极化曲线半经验模型的改进

Semi-empirical model improving for polarization curve of PEMFC

根据实验测得的数据,对燃料电池的极化曲线进行特性分析,归纳建模方法,在Kim模型和Fraser模型的基础上,针对小电流密度区间拟合精度低和拟合参数过多的问题,修正了活化损耗项,提出了改进的半经验模型。比较3个模型拟合结果的鲁棒性和精确性,建立的半经验模型拟合精度更高,实用性更强。

Based on the measured data, the polarization curve characteristics of fuel cells were analyzed, the modeling methods were summarized. To raise low current density fitting accuracy and reduce fitting parameters, activation loss items were fixed, thereby an improved semi-empirical model derived from Kim model and Fraser model was proposed. The robustness and accuracy of fitting results of the three models were compared. The improved semi-empirical model had a better accuracy and higher practicality.