現今燃料電池設計均著重於大面積與大電流的特點，當數個單電池組合而成燃料電池堆（Fuel Cell Stack）之後，組裝所帶來的影響性就比單電池更為複雜且重要。由於組裝的過程中有接觸阻抗，在燃料電池的效率上影響非常大，組裝壓力不夠會造成燃料漏氣、過高的接觸阻抗甚至電池損壞；但是，組裝壓力過大的話又會造成膜電極組的損傷。本研究中利用感壓軟片的可視化技術，來探討燃料電池堆的組裝過程中，膜電極組反應面積上與雙極板間接觸的界面壓力狀況，進而討論以傳統螺栓鎖附方式組裝，不同的螺栓組態和鎖附扭力，對於性能的影響。由實驗的結果中發現螺栓的組態與鎖附扭力所造成的均勻度會對性能有著很顯著的影響。這些實驗結論將提供未來設計燃料電池的依循。

Recently, there is a tendency toward larger reactive area and higher current in PEMFC stack design. The design of assembly of a PEMFC stack becomes much more complex and important than just a single cell. The assembly mechanism will affect the contact behavior between bipolar plates and membrane electrode assemblies （MEAs）and hence the performance of PEMFC stack. Inadequate clamping pressure may lead to leakage of fuels, high electric impedance and malfunction of the cells. On the other hand, excessive clamping pressure may destroy the MEA. This study is to study the PEMFC stack design and its clamping pressure distribution, using the pressure sensitive film (FUJI-FILM I&I) to measure the clamping pressure between the reactive area and the bipolar plates under different bolt-clamping configurations and different clamping forces. According to the experimental results, the stack performance and the pressure’s distribution is greatly influenced by the clamping force and the bolt configuration. The experimental results further our understanding of the effects of clamping conditions on the performance of a PEMFC.

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