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首页> 外文期刊>Energy Conversion & Management >A cell interaction phenomenon in a multi-cell stack under one cell suffering fuel starvation
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A cell interaction phenomenon in a multi-cell stack under one cell suffering fuel starvation

机译：一个燃料匮乏的多电池堆中的电池相互作用现象

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摘要

Cell interaction is the main factor resulting in a shorter lifespan for multi-cell stacks than for a single fuel cell stack. To explain this mechanism, we propose a cell interaction phenomenon in which one cell experiences fuel starvation. A specific voltage distribution along the straight channel direction has been observed with an innovative multi-point monitoring method. This phenomenon also can be used for fuel starvation diagnosis. This study proposes an ingenious simplified two-chamber model to analyze the current and voltage redistribution mechanism under fuel starvation. The reliability of this model has been validated in this paper. The model shows that current convergence resulted by fuel starvation in one cell can lead to a concomitant local current convergence in nearby normal cells. Based on our calculation, 85% of reaction current concentrates in the anode inlet region of the fuel-starved cell, resulting in a 70% current convergence in the two adjacent normal cells. A serious corrosion of the fuel-starved cell is observed in the post-mortem study. The faulty cell presents a 5 degrees contact angle decrease and a 28% ECSA loss. Scanning electron microscopy and Transmission electron microscopy results show that the decline of anode outlet regions' cathode catalyst layers are more serious. Some optimal strategies have been proposed to solve this problem.
机译：电池相互作用是导致多电池堆寿命比单个燃料电池堆短的主要因素。为了解释这种机制，我们提出了一种细胞相互作用现象，其中一个细胞经历了燃料不足。通过创新的多点监测方法，可以观察到沿直线通道方向的特定电压分布。这种现象也可以用于燃料不足的诊断。这项研究提出了一个巧妙的简化的两室模型，以分析燃料不足时的电流和电压重新分配机理。该模型的可靠性已在本文中得到验证。该模型显示，一个电池中燃料不足导致的电流会聚会导致附近正常电池中的局部电流会聚。根据我们的计算，> 85％的反应电流集中在燃料不足电池的阳极入口区域，导致两个相邻的正常电池中70％的电流会聚。在验尸研究中观察到燃料匮乏的电池严重腐蚀。故障电池的接触角降低了5度，ECSA损失了28％。扫描电子显微镜和透射电子显微镜的结果表明，阳极出口区域的阴极催化剂层的下降更为严重。已经提出了一些最佳策略来解决这个问题。

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  • 来源
    《Energy Conversion & Management》 |2018年第10期|465-474|共10页
  • 作者

    Hu Zunyan; Xu Liangfei; Li Jianqiu; Hu Junming; Xu Xin; Du Xiaoli; Sun Weihua; Ouyang Minggao;

  • 作者单位

    Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;

    Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;

    Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;

    Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;

    Shanghai Shenli High Tech Co Ltd, Yuandong Rd, Shanghai, Peoples R China;

    Shanghai Shenli High Tech Co Ltd, Yuandong Rd, Shanghai, Peoples R China;

    Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;

    Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PEM fuel cell; Cell interaction; Fuel starvation; Diagnosis method; Cell flooding; Current density difference;

    机译：PEM燃料电池;电池相互作用;燃料不足;诊断方法;电池溢流;电流密度差;

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