阴极循环对氢燃料电池系统电压钳位及自增湿效应的研究  

Research on Voltage Clamping and Self-humidification Effects of Cathode Circulation in Hydrogen Fuel Cell System

作　　者：王贵荣[1] WANG Guirong(School of Automotive Engineering,Jilin Communications Polytechnic,Changchun 130012,China)

机构地区：[1]吉林交通职业技术学院汽车工程学院,长春130012

出　　处：《电源学报》2023年第4期130-137,共8页Journal of Power Supply

基　　金：教育部科技发展中心产学研创新基金“北创助教”课题项目:新能源汽车实训台智能网联技术应用研究(2018A05024)。

摘　　要：通过阳极和阴极两侧的废气再循环可以实现低电流密度下的电压钳位以及无需外部加湿器的自加湿。基于氮气渗漏和水扩散动态系统仿真模型,提出了一种控制阴阳两极气体压力平衡和限电压的控制算法,并对控制算法进行了仿真分析和有效性验证。试验结果表明阴极循环系统动态性能良好,并能够把氢燃料电池在低电流密度下的单片电压控制在0.85 V以下。通过正交试验发现,进气阀开度和循环泵的转速是实现电压快速控制最重要的影响因素;在阴极再循环系统主动运行下,混合气体最高湿度可达60%。Voltage clamping at low current densities and self-humidification without external humidifiers can be achieved by an exhaust gas recirculation on both sides of the anode and cathode.Based on the simulation model of a dynamic system of nitrogen leakage and water diffusion,a control algorithm for controlling the gas pressure balance and voltage limit of the cathode and anode is proposed,which is further simulated and verified.Test results show that the dynamic performance of the cathode circulation system was satisfying,and the monolithic voltage of the hydrogen fuel cell at low current densities can be controlled below 0.85 V.Through an orthogonal test,it was found that the opening of the intake valve and the rotation speed of the circulating pump were the most important factors to achieve rapid voltage control.Under the active operation of the cathode recirculation system,the maximum humidity of the mixed gas can reach 60%.

关 键 词：氢燃料电池 限电压控制算法 正交试验 氧气浓度 自增湿 

分 类 号：TM912[电气工程—电力电子与电力传动]