Molten Carbonate Fuel Cell Separator Plate with Integrated Sidewalls
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Solution Overview
Problem
Conventional separator plates for molten carbonate fuel cells face challenges in manufacturing complexity, high costs, and corrosion issues due to the need for multiple welding processes and external reformers, which affect gas tightness and temperature distribution, leading to reduced stack lifetime and performance.
Innovation Solution
A separator plate with a corrugated structure and integrated sidewall parts, manufactured using a screen printing coating process, which minimizes the number of welding steps and enhances corrosion resistance, allowing efficient gas flow and electrical connection between the anode and cathode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple welding processes are used to ensure gas tightness, then reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent integrates the manifold and separator plate into a single unified structure, eliminating the need for separate welding processes to connect these components. This merging approach maintains gas tightness while significantly reducing manufacturing complexity and the number of welding steps required.
Solution Approach 2:
The separator plate is designed to perform multiple functions simultaneously: it serves as both a separator between anode and cathode compartments and as a structural support element. This multi-functionality reduces the need for additional components and welding operations, thereby simplifying the manufacturing process while maintaining reliability.
2Adaptability or versatility
If external reformers are used, then fuel gas reforming is achieved, but device complexity and cost increase
Solution Approach 1:
The reforming function is integrated directly into the separator plate structure, combining the reformer and separator functions in one component. This eliminates the need for separate external reformers and reduces overall system complexity while maintaining fuel gas reforming capability.
Solution Approach 2:
The separator plate is designed as a multi-functional component that simultaneously performs separation, structural support, and fuel gas reforming functions. This integration reduces the total number of components required in the system, lowering both device complexity and manufacturing cost.
3Reliability
If conventional coating processes are used, then corrosion resistance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces complex conventional coating processes with a screen printing coating method, which is simpler and more cost-effective. This substitution maintains adequate corrosion resistance while significantly reducing manufacturing complexity and process time.
Solution Approach 2:
The coating process parameters are optimized for screen printing rather than conventional methods, adjusting coating thickness, material composition, and application parameters to achieve adequate corrosion resistance through this simpler process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a simpler and cost-effective manufacturing process, improving the durability and performance of the separator plate by reducing corrosion and ensuring uniform gas flow and temperature distribution, thereby extending the fuel cell stack's lifetime.
Implementation Method 1
manufactured using a screen printing coating process
Implementation Method 2
a channel part formed by processing the central portion of the center plate to form a corrugated structure having guide protrusions and guide grooves
Implementation Method 3
functions to reform a fuel gas while allowing it to efficiently flow therein and thereout, thus producing hydrogen and carbon dioxide
Implementation Method 4
the chemical energy is directly converted into electrical energy through the oxidation-reduction reaction of hydrogen and oxygen
Data Source
AI summary
Disclosed is a separator plate for a molten carbonate fuel cell, which functions to reform a fuel gas while allowing it to efficiently flow therein and thereout, thus producing hydrogen and carbon dioxide, which are then supplied into an anode, and which functions to realize the electrical connection between the anode and the cathode. In the center plate, having a central portion and peripheral portions of the separator plate, the central portion has gas flow paths, that is, guide protrusions and guide grooves, and the peripheral portions are formed into sidewall parts through a folding process, and thus the number of constituents of the separator plate is minimized, thereby reducing the area to be welded. Further, the sidewall parts are integrally structured with the center plate, thereby increasing airtightness and solving problems of corrosion which may be caused in the welded area.