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- W4310971554 abstract "Proton exchange membrane fuel cells (PEMFCs) have been extensively studied and commercialized in many fields, such as electric vehicle and residential applications, but some operational and technical challenges limit their more widespread use. One of the challenges is that PEMFCs are prone to drying or flooding due to inappropriate operating conditions. However, there is a lack of simple and effective method to detect the faults in advance. To address the issue, this paper presents an early diagnosis approach by measuring the phase of single-frequency impedance. Impedance responses under different conditions of water content in the stack were studied in this paper. Experiments show that the impedance phase angles in the mid-frequency range (tens of Hz) are positively correlated with the water content in the stack. By analyzing the experimental results, a fuel cell fault diagnosis method based on single-frequency impedance phase angle is proposed. This method is simple, effective, and easy to implement. It can be used for early faults diagnosis and closed-loop water management to improve the performance, durability, and reliability of the fuel cell system." @default.
- W4310971554 created "2022-12-21" @default.
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- W4310971554 date "2022-10-17" @default.
- W4310971554 modified "2023-09-25" @default.
- W4310971554 title "Early Fault Diagnosis Approach for PEM Stack based on Phase Measurement of Single-Frequency Impedance" @default.
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- W4310971554 doi "https://doi.org/10.1109/iecon49645.2022.9968622" @default.
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