Porous Base Layer Through-Holes for Uniform MEA Fluid Supply
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Solution Overview
Problem
Existing electrochemical devices, such as water electrolysis stacks, face challenges in uniformly supplying target fluids to the membrane electrode assembly, leading to inefficient performance and reduced durability due to structural limitations in the porous base layer, particularly in the land areas contacting the separator.
Innovation Solution
A porous base layer with strategically designed through-holes in the land areas, increasing porosity from the inlet to the outlet of the channel, and varying cross-sectional areas to enhance fluid transfer efficiency and uniform distribution across the membrane electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the porous base layer uses a uniform structure in land areas, then the structure is simple and easy to manufacture, but the target fluid cannot be effectively supplied to the land area, leading to dead zones and reduced performance
Solution Approach 1:
The patent applies local quality by creating through-holes specifically in the land area portion of the porous base layer, while maintaining a different structure in the channel area. This localized modification enables effective fluid supply to the land area without unnecessarily complicating the entire structure. The through-holes are strategically positioned only where needed (in the land area corresponding to the separator land) to eliminate dead zones and improve target fluid distribution to the membrane electrode assembly.
2Reliability
If the porosity is uniform across the porous base layer, then the manufacturing process is simple, but the target fluid cannot be uniformly distributed across the membrane electrode assembly, resulting in inefficient performance
Solution Approach 1:
The patent implements local quality by varying the porosity distribution across different regions of the porous base layer. Specifically, the land area is designed with through-holes to enhance fluid supply, while the channel area maintains a different porosity structure. This regional differentiation ensures uniform target fluid distribution across the membrane electrode assembly, preventing dead zones in the land area while maintaining manufacturing feasibility through a structured approach.
3Reliability
If the porous base layer has low porosity in land areas, then the structural strength is maintained, but the target fluid transfer efficiency is reduced, leading to dead zones and reduced durability
Solution Approach 1:
The patent applies the porous materials principle by introducing through-holes in the land area of the porous base layer. These through-holes create additional fluid pathways that significantly enhance target fluid transfer efficiency to the membrane electrode assembly. The porous structure is strategically designed to eliminate dead zones while maintaining appropriate structural strength, thereby improving both fluid transfer efficiency and device durability.
4Reliability
If the porous base layer does not have through-holes in land areas, then the structure is intact and simple, but the target fluid cannot pass through the land area, creating dead zones and reducing performance
Solution Approach 1:
The patent applies local quality by selectively creating through-holes only in the land area portion of the porous base layer, while maintaining the integrity of the channel area structure. This localized structural modification enables target fluid to pass through the land area effectively, eliminating dead zones and improving performance efficiency. The approach minimizes structural complexity by applying modifications only where necessary rather than throughout the entire base layer.
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
This design ensures stable and efficient transfer of target fluids, minimizing dead zones and improving the durability and reliability of the electrochemical device by uniformly supplying fluids to both channel and land areas, thereby enhancing overall performance and output.
Implementation Method 1
at least one through-hole provided in the land area so that a target fluid passes through the through-holes
Implementation Method 2
a porosity of the land area is defined to increase in a direction from an inlet portion to an outlet portion of the channel
Data Source
AI summary
A porous base layer includes a porous base portion provided between a membrane electrode assembly (MEA) and a separator including a channel and a land, a channel area defined on the porous base portion to correspond to the channel, a land area defined on the porous base portion to correspond to the land and provided to be in contact with the land, and at least one through-hole provided in the land area so that a target fluid passes through the through-holes, obtaining an advantageous effect of ensuring performance and operational efficiency and improving durability and reliability.