Fabrication by vacuum die casting and simulation of aluminum bipolar plates with micro-channels on both sides for proton exchange membrane (PEM) fuel cells
Fabrication by vacuum die casting and simulation of aluminum bipolar plates with micro-channels on both sides for proton exchange membrane (PEM) fuel cells
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DOI：
10.1016/j.ijhydene.2011.10.050
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发表时间：
2012
影响因子：
7.2
通讯作者：
C. Jin;C. Kang
中科院分区：
文献类型：
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作者：
C. Jin;C. Kang
在双极板的制造方法中，真空压铸是一种理想的工艺，因为可以实现任意复杂的形状并且可以以高生产率进行批量生产。我们报告了通过真空压铸制造两侧带有微通道阵列的双极板，用于质子交换膜（PEM）燃料电池。研究了在不同实验条件（熔融金属温度、注射速度和真空辅助）下制造的样品的成形性、机械性能和微观结构，并对实验和模拟结果进行了比较。模腔与双极板面积相等，长 200 毫米，宽 200 毫米，厚 0.8 毫米。通道的有效面积为110毫米×150毫米，总板厚为1.1毫米（通道的宽度和深度分别为1和0.3毫米）。本研究中使用的铸造材料是 Silafont-36 合金（Al-Si-Mg-Mn）。在以下条件下获得具有很少铸造缺陷的高质量样品：熔融金属温度为 700°C；慢射和快射的注射速度分别为 0.3 和 2.5 m s−1；真空压力为 30 kPa。
Among manufacturing methods for bipolar plates, vacuum die casting is an ideal process because arbitrarily complicated shapes and mass production is possible with a high production rate. We report on the fabrication of bipolar plates with micro-channel arrays on both sides by vacuum die casting for use in proton exchange membrane (PEM) fuel cells. The formability, mechanical properties, and microstructures of samples fabricated under various experimental conditions—molten metal temperature, injection velocity, and vacuum assistance—are investigated, and the experimental and simulation results are compared. The die cavity, which is equal to the bipolar plate area, is 200 mm long, 200 mm wide, and 0.8 mm thick. The active area of the channel is 110 mm × 150 mm, and the total plate thickness is 1.1 mm (the width and depth of the channel are 1 and 0.3 mm, respectively). The cast material used in this study is Silafont-36 alloy (Al–Si–Mg–Mn). Good quality samples with very few casting defects are obtained under the following conditions: molten metal temperature of 700 °C; injection velocities for slow and fast shots of 0.3 and 2.5 m s−1, respectively; and vacuum pressure of 30 kPa.