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首页> 外文期刊>International journal of green energy >Investigation of three system shut-down strategies alongside optimization suggestion for proton exchange membrane fuel cells via in-situ measurements
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Investigation of three system shut-down strategies alongside optimization suggestion for proton exchange membrane fuel cells via in-situ measurements

机译：通过现场测量研究质子交换膜燃料电池的三种系统关闭策略以及优化建议

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摘要

Carbon corrosion caused by H-2/O-2 interface during the shut-down process is one of the factors that exacerbate the overall degradation of proton exchange membrane fuel cells (PEMFC) in automotive applications. Numerous studies have shown that system strategies are beneficial for reducing the duration of H-2/O-2 interface and alleviating performance degradation. In this paper, three different shut-down strategies are investigated and compared based on the internal behaviors acquired by in-situ measurements. For the three shut-down strategies, reverse current and high potential are mainly observed in a lower constant current and constant power strategy. Comparatively speaking, the internal uniformity of the cell under constant current and power load is better than that with constant voltage strategy when the shut-down time is about the same. The results suggest that adopting a higher constant power load followed by a larger voltage load during the shut-down process can effectively shorten the shut-down time and relieve carbon corrosion. These results add significant new insights into the shut-down process and will be of practical importance in directing design of combined shut-down strategy that can withstand carbon corrosion.
机译：在关闭过程中，由H-2 / O-2界面引起的碳腐蚀是加剧汽车应用中质子交换膜燃料电池（PEMFC）整体降解的因素之一。大量研究表明，系统策略有利于减少H-2 / O-2接口的持续时间并减轻性能下降。本文基于现场测量获得的内部行为，研究并比较了三种不同的关闭策略。对于这三种关断策略，主要在较低的恒定电流和恒定功率策略中观察到反向电流和高电势。相对而言，当关闭时间大致相同时，在恒定电流和功率负载下，电池的内部均匀性要好于恒定电压策略下的电池。结果表明，在关机过程中采用较高的恒定功率负载，再采用较大的电压负载，可以有效缩短关机时间并缓解碳腐蚀。这些结果为关闭过程增添了重要的新见解，对于指导设计可以承受碳腐蚀的联合关闭策略具有实际意义。

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  • 来源
    《International journal of green energy》 |2020年第5期|157-170|共14页
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    Harbin Inst Technol Sch Mech & Elect Engn Harbin Heilongjiang Peoples R China|Southern Univ Sci & Technol Dept Mech & Energy Engn Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci & Technol Dept Mat Sci & Engn Shenzhen Key Lab Hydrogen Energy Shenzhen 518055 Guangdong Peoples R China;

    Harbin Inst Technol Sch Mech & Elect Engn Harbin Heilongjiang Peoples R China|Southern Univ Sci & Technol Dept Mat Sci & Engn Shenzhen Key Lab Hydrogen Energy Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci & Technol Dept Mech & Energy Engn Shenzhen 518055 Guangdong Peoples R China;

    Shenzhen Nan Ke Fuel Cell Co Ltd Shenzhen Guangdong Peoples R China;

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  • 正文语种 eng
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  • 关键词

    PEMFC; Shut-down strategy; In-situ measurement; Current density distribution; Temperature and RH distribution; Uniformity;

    机译：PEMFC;关机策略;原位测量;电流密度分布;温度和相对湿度分布;均匀度;

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