| Summary: | 碩士 === 國立中央大學 === 機械工程學系 === 102 === One of ways to improve Redox-flow batteries or particularly vanadium Redox flow battery (VRB) performance is by increasing micro-flow channels aspect ratio on bipolar plates. Aspect ratio increments are obtained by the increasing of channel depth. There are many research investigate several methods to produce a high aspect ratio of the micro-flow channel on bipolar plate, but it seems a high pressure required in overall forming method. To produce micro-flow channel with high aspect ratio, this research investigates forming pressure and temperature affect into the final geometry by low-pressure superplastic-like forming of non-superplastic aluminum alloy 5052. In this superplastic-like forming, a hot draw mechanical pre-forming (HDMP) are performed before applied gas blow (superplastic) forming. Furthermore, finite element model by ANSYS LS-DYNA was done to simulate this forming process. The simulation result was used to verify the validity of the experiments result.
The research indicates that the 0.591 aspect ratio of aluminum alloy 5052 micro flow channel with 0.5 thicknesses produced by low pressure superplastic-like forming (450 °C and 1 MPa). Compared to the other forming process, superplastic-like forming has advantage that only low pressure needed to produce micro-flow channel at metallic bipolar plates.
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