PEMFC的通用稳态电压模型的开发

Development of a generalised steady-state voltage model for PEMFC

为了进行电池控制设计而为电池输出电压建立模型。在分析大量文献的机理模型和经验模型的基础上,将机理和经验两种建模方法良好结合,重点是改进电池膜阻抗部分的模型,目的是使得到的PEMFC电压模型因为基于机理基础而具有灵活的有效性,同时又有经验的形式而具有适合控制的简单性。多组PEMFC实验数据的验证表明,提出的膜阻抗模型能够在电流密度为0～0.9A/cm的范围内准确预测各种Nafion117膜的阻抗,电压模型能够在很大的电流密度范围内,适用于具有不同反应面积和不同特点Nafion膜的PEM燃料电池,因此是PEM燃料电池发电系统仿真和设计分析的一个很有用的工具。

Output voltage of proton exchange membrane fuel cell was modeled for control design. According to many mechanistic and empirical models in the literature, an output voltage model has been developed by combination of mechanistic and empirical modeling techniques. So this model has the potential to couple with mechanistic validity and empirical simplicity. This model focused on modeling membrane resistance of the cell. Then based on some groups of experimental data, it could be found that this membrane resistance model accurately predicted all Nafion 117 membranes resistances in the current density range of 0 to 0.9 A/cm2, and this voltage model contained the capability of dealing with PEM fuel cell of any active area and Nafion membrane thickness up to relatively high current densities. So this model is an extremely useful tool for simulation and design analysis of fuel cell power systems.