直接甲醇燃料电池动态性能的研究  

STUDY OF DYNAMIC PERFORMANCE OFA DIRECT METHANOL FUEL CELL

作　　者：汪茂海[1] 郭航[1] 马重芳[1] 贾杰林[1] 刘璿[1] 叶芳[1] 俞坚[1] 

机构地区：[1]北京工业大学环境与能源工程学院传热强化与过程节能教育部重点实验室,北京市朝阳区100022

出　　处：《中国电机工程学报》2005年第6期161-165,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50236010 50028605);中德科学中心基金(GZ207(101/7))。~~

摘　　要：直接甲醇燃料电池用作移动电源时,电池的动态响应特性特别重要。该文作者利用自行设计的直接甲醇燃料电池测试系统对一有效面积为 50cm2 的直接甲醇单体燃料电池的动态性能进行了实验研究。通过计算机控制电池负载的动态变化。实验研究了电流变化不同波形及各种波形下加载电流大小、斜率变化对电压信号动态响应的影响。结果表明电池电压对各种电流变化的响应很快。动态负载时电池的开路电压要比稳态运行时的高,主要原因是因甲醇窜流造成的过电势的减少。电池内部电化学反应与传质瞬态变化的综合作用对电池动态运行有着关键的影响。Dynamic response of direct methanol fuel cell is very important for the transportable applications. The experiments of the transient response of a single direct methanol fuel cell with 50cm2 active area were performed on a test system with a computer-controlled electronic load. The influence of shapes of current loading cycles including rectangle,triangle and trapezium and magnitude and slope of increasing current on the cell voltage response were studied. The results reveal that the cell responds rapidly to variable current change. The open circuit voltage of the cell under dynamic operating is higher than that under steady state owe to the reduction of mixed potential caused by methanol crossover. The interactions between transient behaviors of mass transfer and electrochemical reactions inside fuel cell significantly affect the dynamic operation of the direct methanol fuel cell.

关 键 词：直接甲醇燃料电池 动态性能 动态响应特性 电池测试系统 实验研究 电流变化 计算机控制 电化学反应 移动电源 有效面积 自行设计 动态变化 电压信号 电池电压 稳态运行 开路电压 动态负载 动态运行 综合作用 过电势 波形 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TP277[自动化与计算机技术—检测技术与自动化装置]