Structured Distributor Plate for Uniform Gas Flow and Water Drainage
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Solution Overview
Problem
Existing electrochemical cell distributor plates face challenges in achieving homogeneous gas supply and efficient water drainage, leading to inhomogeneous current density distribution and reduced power density due to poor design of ducts and connecting portions, especially under flooding conditions.
Innovation Solution
A distributor plate with a structured design featuring connecting portions and main ducts, including secondary ducts with varying hydrophobic and hydrophilic surfaces, and distributor ducts arranged at specific angles to enhance gas distribution and water drainage, produced by applying and removing coatings to create distinct surface patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional distributor plates with uniform duct structures are used, then manufacturing is simple, but gas supply homogeneity deteriorates and water drainage efficiency is poor
Solution Approach 1:
The distributor plate is segmented into multiple regions (first region, second region, third region) with different duct configurations. Each region has specifically designed main ducts and secondary ducts with varying patterns to address local reaction conditions, achieving homogeneous gas supply across the entire plate surface while maintaining manageable manufacturing complexity through modular design
Solution Approach 2:
Different regions of the distributor plate are assigned different surface patterns and duct configurations tailored to local requirements. The first region near the inlet has one pattern, the second region has another, and the third region has a third pattern, optimizing gas distribution and water drainage locally while improving overall gas supply homogeneity
2Productivity
If simple connecting portions are used, then device complexity is low, but water drainage efficiency deteriorates under flooding conditions
Solution Approach 1:
Secondary ducts are added as a third dimensional element extending from the main ducts into the connecting portions. This creates a multi-level drainage architecture where water can be removed both laterally through main ducts and vertically through secondary ducts, dramatically improving water drainage efficiency under flooding conditions while maintaining reasonable structural complexity
Solution Approach 2:
The secondary ducts are nested within or extending from the main duct structure, creating a hierarchical drainage system. The smaller secondary ducts are positioned within the larger main duct framework, allowing efficient water removal through multiple levels of the connecting portions without excessive structural complexity
3Manufacturing precision
If uniform surface patterns are used across the distributor plate, then manufacturing is easy, but current density distribution becomes inhomogeneous
Solution Approach 1:
The distributor plate surface is divided into regions with different patterns optimized for local current density requirements. The first region has a pattern suited for high current density areas, the second region has a different pattern for medium current density, and the third region has yet another pattern for low current density areas, achieving homogeneous current density distribution across the entire plate
Solution Approach 2:
The surface pattern is segmented into distinct regions rather than using a uniform design. Each segment (first, second, and third regions) has specifically tailored patterns that address local electrochemical reaction intensities, improving overall current density homogeneity while maintaining manufacturing feasibility through region-based fabrication approaches
4Power
If no regional differentiation is applied, then device complexity is low, but power density is reduced due to inhomogeneous reaction conditions
Solution Approach 1:
Different regions of the distributor plate are configured with specific patterns and duct arrangements optimized for local reaction conditions. This regional differentiation ensures homogeneous gas supply and efficient water drainage across all areas, maximizing local reaction efficiency and thereby increasing overall power density while maintaining manageable structural complexity through systematic regional design
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 structured distributor plate improves gas supply homogeneity and water drainage efficiency, optimizing current density distribution and power density by adjusting flow behavior according to local reaction conditions.
Implementation Method 1
a layer of the hydrophobic coating is partially removed in different thicknesses such that the secondary ducts are created and, depending on the thickness of the removed layer, have a hydrophobic secondary duct surface or hydrophilic secondary duct surface
Implementation Method 2
a layer of the hydrophobic coating is partially removed in different thicknesses such that the secondary ducts are created and, depending on the thickness of the removed layer, have a hydrophobic secondary duct surface or hydrophilic secondary duct surface
Data Source
AI summary
The invention relates to a distributor plate (7) for an electrochemical cell (1), the distributor plate (7) having a structure comprising connecting portions (12) with surfaces (13), and main ducts (11) having floor surfaces (33).The surfaces (13) and optionally on the floor surfaces (33) of the secondary ducts (15) are provided with a pattern (92) andthe distributor plate (7) has at least two regions (94) in which the patterns (92) on the surfaces (13) differ from one another. The invention further relates to a method for producing the distributor plate (7), an electrochemical cell (1), and a method for operating an electrochemical cell (1).