高溫質子交換膜燃料電池堆內局部溫度與電壓之微觀監測

Micro-monitoring local temperature and voltage in a high-temperature proton exchange membrane fuel cell stack

張治評(Chih-Ping Chang)

指導教授 ： 李其源

元智大學/工程學院/機械工程學系/碩士(2012年)

https://doi.org/10.6838/YZU.2012.00268

摘要

質子交換膜燃料電池堆化學反應過程中，其內局部溫度與電壓值分佈不均勻，會影響膜電極組的反應、以及燃料電池堆性能與壽命。
本研究利用微機電系統技術，開發出適用於高溫電化學環境之新一代可撓式微型溫度與電壓感測器，其基材為聚醯亞胺(Polyimide foil, 50µm)、保護層材料選用耐溫性更佳之聚醯亞胺(PI)，以取代光阻。
12個微型感測器嵌入於高溫質子交換膜燃料電池堆(HT-PEMFC, 7 cells)之陰極流道板，比較性能曲線結果發現嵌入微型感測器於電池堆內，對電池堆性能沒有影響。在160、170°C之操作溫度與定電流(2、10、20A)條件下，微型感測器量測到電池堆內局部溫度與電壓之曲線趨勢相當一致，驗證了微型感測器之可靠性；其測試結果亦顯示，電池堆內熱分佈不均；大電流(20A)之輸出下，電壓曲線有下降之趨勢，原因為燃料供應的不足。

關鍵字

新一代可撓式微型溫度與電壓感測器 ； 高溫質子交換膜燃料電池堆 ； 即時微觀量測

並列摘要

The non-uniform distributions of internal temperature and voltage in a membrane electrode assembly (MEA) of proton exchange membrane fuel cell (PEMFC) stack affect not only the reactions that occur in it, but also its performance and lifetime.
In this work, micro-electro-mechanical systems (MEMS) are utilized to develop a new generation of flexible micro temperature and voltage sensors for use in high-temperature electrochemical environments. Polyimide foil (50μm) is selected as a substrate, and liquid polyimide is used as the protecting layer because of its high temperature resistance.
Twelve micro sensors are embedded in the cathode flow plate of the HT-PEMFC stack (7 cells). The results demonstrate that they do not influence stack performance. The curves of local temperature and voltage that were measured by micro sensors in the cell stack at the operating temperatures of 160 and 170°C and at constant currents of 2, 10 and 20A are fairly consistent each other. The results show that the non-uniform distributions of temperature and the voltage curves decrease slowly at a constant current of 20A because of a lack of fuel supply.

並列關鍵字

New generation of flexible micro temperature and voltage sensors ； HT-PEMFC stack ； in-situ measurement

參考文獻

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