无浓度传感器控制直接甲醇燃料电池启动方法  

A sensor-less concentration control method for DMFC start-up

作　　者：甘海波 秦兵[1] 杨林林[1] 孙公权[1] 孙海[1] GAN Hai-bo;QIN Bing;YANG Lin-lin;SUN Gong-quan;SUN Hai(Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian Liaoning 116023, China;University of Chinese Academy of Sciences, Beijing 100039, China)

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院大学,北京100039

出　　处：《电源技术》2019年第5期808-811,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(21576259)

摘　　要：甲醇浓度的动态调控对直接甲醇燃料电池(DMFC)的顺利启动和稳定高效运行至关重要。基于DMFC输出信号(电压/电流)与甲醇浓度的单峰关系提出一种无浓度传感器控制DMFC启动的方法。该方法控制DMFC电堆恒流或恒压放电,使用温度补偿后的电压或电流反馈,使电堆在较高的浓度下运行,快速升温。启动后期,引入第二阶段使浓度快速恢复。结果表明,在两种放电模式以及低初始浓度下,该方法均可使DMFC电堆在13 min内启动。The control of methanol concentration is crucial for smooth start-up and stable and efficient operation of direct methanol fuel cells (DMFCs). Based on the unimodal relationship between the voltage (current) and the methanol concentration, this work presented a sensor-less control method for DMFC start-up. The DMFC started up under constant current or voltage (CC/CV discharge mode). The methanol concentration was adjusted by the temperature compensated voltage (current). In order to heat-up quickly, the DMFC was operated at a high methanol concentration. A second stage was introduced to make the stack smoothly turn to the normal operation state. The results show that the method can work well at CC/CV discharge mode, even though the initial concentration is very low. The start-up time in every condition is less than 13 minutes.

关 键 词：直接甲醇燃料电池 启动 无浓度传感器 甲醇浓度控制 

分 类 号：TM911.4[电气工程—电力电子与电力传动]