Abstract
Bipolar plates are a major part of fuel cells, which are a clean and recyclable energy source. This study was carried out with two dies for a bipolar plate forming investigation with the magnetic pulse method: a bipolar plate die and a 10-channel die. With the bipolar plate die, the forming of bipolar plates with a Cu110 sheet and a Grade 2 Ti sheet indicated that the bipolar plate die needed optimization for a full replication. The obtained maximum average depth percentage was 86% for a Cu110 sheet, while it was 54% for a Grade 2 Ti sheet in this study. A further increase of the depth percentage is possible but requires a much higher capacitor bank energy. The increase of the capacitor bank energy would result in severe tearing, while the depth percentage increase was little. The primary current and flyer velocity were measured at various capacitor bank energies. With the 10-channel die, the die parameters’ effect on metal sheet forming was investigated with a Cu110 sheet and an SS201 sheet. The draft angle had a significant effect on the replication of the die surface. The full replication was achieved for channels with proper parameters with both a Cu110 sheet and an SS201 sheet. Therefore, the bipolar plate die could be optimized based on the 10-channel die results.
Highlights
Due to the current problems, such as global warming and harmful pollutants, people have begun to search for other energy sources that are different from natural gas, oil, and coal [1,2]
It deformed into the shape of the bipolar plate die (Figure 5a) with the magnetic pulse forming method
The cross section of the formed bipolar plate was prepared for the dimensional measurement of the channels
Summary
Due to the current problems, such as global warming and harmful pollutants, people have begun to search for other energy sources that are different from natural gas, oil, and coal [1,2]. Fuel cells, which are a clean and recyclable energy source [3]. The polymer electrolyte membrane fuel cell (PEMFC), the operation temperature of which is 30–100 ◦ C, is a better choice for city buses and power systems of portable electronic devices. Up to now, fuel cells had limited applications. The high cost is a big issue, which limits its wide use (4–10 times more expensive than internal combustion engines). The majority of the cost of fuel cells is used in materials and manufacturing. The fabrication of the frames of the fuel cell, which are called bipolar plates, takes up
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