中文摘要 …...........Ⅰ Abstract…………………………………………………………………II Acknowledgement …….III Contents ……...IV List of Pictures and Tables ……...VI 1. Introduction 1 1-1 Foreword 1 1-2 Motive of Research 1 1-3 Objective of Research 2 1-4 Organization of Research 3 2. Literature Review 5 2-1 Application of PEMFC 5 2-2 Types of Fuel Cell 5 2-3 Review of Bipolar Plates 8 3. Research Method 10 3-1 Configuration and Function in PEMFC 10 3-1-1 Configuration of PEMFC 10 3-1-2 The Component of PEMFC 11 3-2 Experimental Design of Taguchi Method 14 3-2-1 Taguchi Method 14 3-2-2 Procedure of The Design of Experiment 14 3-2-3 Estimation of Characteristic Value in S/N Ratio 15 3-2-3-1 S/N Ratio of Smaller-The-Better Type 16 3-2-3-2 S/N Ratio of Large-The-Better Type 16 3-2-3-3 S/N Ratio of Nominal-The-Best Type 17 3-2-4 Disposition of Experimental Factors 18 3-3 Bipolar Plate Manufacturing 18 3-3-1 Material in Bipolar Plate 18 3-3-2 Processing Window Experiment 19 3-3-3 Disposition of the Experimental Bipolar Plates 20 3-3-4 Warpage Measuring of Bipolar Plate 20 3-3-5 Microstructure of Bipolar Plates in Optical Microscope 21 4. Experimental Analysis 28 4-1 Experimental Procedures 28 4-2 Thin wall Injection Molding 28 4-3 Material and Fabrication 29 4-4 Processing Window of Injection molding 30 4-5 Identify control factors 32 4-6 Form Orthogonal Arrays 32 4-6-1 Optimal Parameters for LDPE and Composite 34 4-7 Experimental Analysis to Determine Injection Molding Parameters 34 4-7-1 The results of LDPE for Different Parameters 34 4-7-2 The results of Composite for Different Parameters 36 5. Conclusion and Suggestion 53 5-1 Conclusion 53 5-2 Suggestion 54 Reference 55 Appendix 57 Introduction of Author 62 List of Figures and Tables Figure 1-1 The water is separated into hydrogen and oxygen by the passage of an electric current, and then the oxygen and hydrogen are recombining 4 Figure 3-1 The configuration of the PEMFC 22 Figure 3-2 The operation of the PEMFC. 22 Figure 3-3 The schema of the fuel cell stack 23 Figure 3-4 The material of graphite-polymer composite in bipolar plates 23 Figure 3-5 The processing window 24 Figure 3-6 The path of measuring 24 Figure 3-7 The plate of steel for measuring the part 25 Table 3-1 The property of low density polyethylene 25 Table 3-2 The orthogonal arrays L9 26 Table 3-3 The experimental levels and factors in the graphite-polymer composite. 27 Table 3-4 The experimental levels and factors in the LDPE. 27 Figure 4-1 The injection molding. 38 Figure 4-2 The processing window of the composite and the polyethylene. 38 Figure 4-3 The picture of bipolar plate. 39 Figure 4-4 The microstructure of OM for composite (20X). 39 The Figure 4-5 The Three-Dimensional Laser Scanner. 40 Table 4-1 The experimental levels and factors in the graphite-polymer composite 40 Table 4-2 The experimental levels and factors in the LDPE 41 Table 4-3 The orthogonal arrays L9 41 Table 4-4 The orthogonal array with three levels and results of the experiment for graphite-polymer composite material 42 Table 4-5 The orthogonal array with three levels and results of the experiment for low density polyethylene 42 Table 4-6 The response to S/N ratio for graphite-polymer composite material. 43 Table 4-7 The response to S/N ratio for low density polyethylene. 43 Figure 4-6 The response to factor of S/N ratio for composite. 43 Figure 4-7 The response to factor of S/N ratio for LDPE. 44 Table 4-8 The optimal factors for graphite-polymer composite material 44 Table 4-9 The optimal factors for low density polyethylene 44 The Table 4-10 The value of warpage in the different melt temperatures for low density polyethylene 45 The Figure 4-8 The value of warpage in the different melt temperatures for low density polyethylene. 45 The Table 4-11 The value of warpage in the different mold temperatures for low density polyethylene. 46 The Figure 4-9 The value of warpage in the different mold temperatures for low density polytheylene. 46 The Table 4-12 The value of warpage in the different injection speeds for low density polyethylene. 47 The Figure 4-10 The value of warpage in the different injection speeds for low density polyethylene. 47 The Table 4-13 The value of warpage in the different packing pressures for low density polyethylene. 48 The Figure 4-11 The value of warpage in the different packing pressures for low density polyethylene. 48 The Table 4-14 The value of warpage in the different melt temperatures for graphite-polymer composite. 49 The Figure 4-12 The value of warpage in the different melt temperatures for graphite-polymer composite. 49 The Table 4-15 The value of warpage in the different mold temperatures for graphite-polymer composite. 50 The Figure 4-13 The value of warpage in the different mold temperatures for graphite-polymer composite. 50 The Table 4-16 The value of warpage in the different injection speeds for graphite-polymer composite. 51 The Figure 4-14 The value of warpage in the different injection speeds for graphite-polymer composite. 51 The Table 4-17 The value of warpage in the different packing pressures for graphite-polymer composite. 52 The Figure 4-15 The value of warpage in the different packing pressures for graphite-polymer composite 52