Modular Planar Interconnect Plate Stamping for SOFC Sealing
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Solution Overview
Problem
Existing methods for preparing modular planar interconnect plates for solid oxide fuel cells do not effectively address the need for a novel design that enhances channel structure and sealing to prevent fuel leakage while maintaining manufacturing simplicity.
Innovation Solution
A method involving a metal blank sheet with specific stamping processes to form upper and lower main channels, surrounding protrusions and depressions, and additional features to create a modular planar interconnect plate with enhanced structural reinforcement and sealing capabilities, allowing for efficient fuel and oxygen fluid flow without leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple stamping steps are performed to form complex channel structures, then the sealing capability and structural integrity are improved, but the manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into two distinct stamping steps: a first stamping step that forms columns of protrusions and columns of depressions, and a second stamping step that forms rows of protrusions and rows of depressions. This segmentation allows each stamping operation to focus on specific structural features, improving sealing capability while keeping individual manufacturing steps manageable and well-defined.
2Strength
If multiple stamping steps are performed to form complex channel structures, then the structural integrity is enhanced, but the manufacturing time increases
Solution Approach 1:
Multiple structural features (columns of protrusions, columns of depressions, rows of protrusions, rows of depressions) are merged into a single integrated interconnect plate structure through sequential stamping. The first and second stamping steps create overlapping patterns that form a unified three-dimensional network of channels and sealing features, achieving high structural integrity while maintaining manufacturing efficiency.
3Reliability
If surrounding protrusions and depressions are added to openings, then the sealing capability is improved, but the device complexity increases
Solution Approach 1:
The surrounding protrusions and depressions are formed as integral parts of the stamping process itself, rather than as separate post-processing features. The first stamping step creates surrounding protrusions at openings, and the second stamping step creates surrounding depressions, ensuring sealing features are built-in from the beginning of manufacturing, which improves sealing capability without requiring additional complex assembly steps.
Data Source
AI summary
A method for preparing a modular planar interconnect plate includes steps of a) providing a metal blank sheet having a main region and two first lateral regions, b) forming two openings respectively in the first lateral regions, and c) stamping to form protrusions and depressions at the main region on lower and upper surfaces of the metal blank sheet. In the stamping step, each of two lower surrounding protrusions and two upper surrounding depressions is formed to surround a corresponding one of the openings, and each of an upper surrounding protrusion and a lower surrounding depression is formed to surround the first lateral regions and the corresponding ones of the protrusions and depressions formed at the main region.