This invention presents a novel flow field design with a flow divider for a fuel cell stack. It integrates rectangular porous inserts within the flow channels to ensure uniform distribution of reactants and effective humidification using internally generated water. This design addresses the challenges of uneven mass flow distribution and inefficient water management in fuel cells, enhancing overall performance and longevity.
Figure 1. Top view & front view of bipolar plate cathode and anode used in the fuel stack assembly
Conventional flow field designs in fuel cells often result in uneven mass flow distribution, leading to inconsistent current production and accelerated degradation of the Membrane Electrode Assembly (MEA). Additionally, traditional designs do not effectively manage internal humidification, impacting the cell's electrochemical performance and efficiency.
- Rectangular porous inserts within flow channels ensure uniform gas distribution, leading to consistent current production across cells
- Enhanced turbulence and diffusion rates for better electrochemical reactions
- Suitable for both anode and cathode plates, distributing hydrogen and air respectively
- Constructed from SS316L, Carbon-coated strips, and Titanium grade 2, reducing the overall weight of the fuel cell module
- Effective heat management through double serpentine coolant channels
- Integration of porous glass matrix and polymer materials enhances water removal, preventing flooding, and ensuring effective ion conductivity
- Counter-flow configuration enhances water crossover and humidification, eliminating the need for external humidifiers
- Easy-to-assemble design with built-in sections for multiple functions
- Reduces MEA degradation over time, enhancing fuel cell longevity
Prototypes of the fuel cell stack incorporating the novel flow field design have been developed and tested. These prototypes showcase the enhanced uniformity in gas distribution and effective internal humidification, confirming the advantages of the innovative design.
The technology is in the prototyping stage, demonstrating significant improvements in fuel cell performance and efficiency in initial tests. Further development and optimization are ongoing to prepare for commercial applications.
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The invention promises to advance sustainable energy solutions by improving the efficiency and reliability of hydrogen fuel cells. This contributes to reducing greenhouse gas emissions and dependence on fossil fuels, promoting cleaner energy alternatives.
- Fuel cell vehicles
- Stationary fuel cell systems
- Portable fuel cell applications
- Renewable energy systems
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