Solid Oxide Fuel Cell Interconnect Shielding Plates
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Solution Overview
Problem
Conventional planar solid oxide fuel cells experience power efficiency and stability issues due to deformation and reaction of seal materials with fuel fluids, leading to suboptimal power density and fuel utilization.
Innovation Solution
A modular planar interconnect device with a planar interconnect body, shielding plates, and auxiliary seal members is introduced, featuring grooved channels and recessed regions to enhance fluid management and sealing between anode and cathode webs, improving the stacking efficiency of solid oxide fuel cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If seal material is used for stacking planar solid oxide fuel cells, then the fuel cells can be electrically connected in series to produce high voltage, but the seal material may deform and come into contact with fuel fluid leading to reduced power efficiency and stability
Solution Approach 1:
The interconnect device is divided into multiple functional regions: an upper major surface with cathode support and oxygen fluid channels, and a lower major surface with anode support and fuel fluid channels. This segmentation allows separate management of fuel and oxidant flows, preventing seal material contamination while maintaining electrical connectivity for high voltage output.
Solution Approach 2:
The interconnect body acts as an intermediary component between adjacent planar cell units, providing both electrical connection and fluid distribution functions. The grooved channels serve as intermediary pathways for fuel and oxygen fluids, eliminating the need for separate seal materials that could deform and contaminate the fuel.
2Ease of manufacture
If conventional sealing methods are used, then the planar cell units can be stacked, but the seal material may react with or be eluted by the fuel fluid
Solution Approach 1:
The interconnect body incorporates grooved channels that provide structured pathways for fluid flow. These channels are formed directly in the interconnect material, eliminating the need for separate porous seal materials that could react with or be eluted by the fuel fluid, while still enabling effective stacking of multiple cell units.
3Power
If fuel fluid flow is not optimized, then the cell structure remains simple, but power density and fuel utilization are reduced
Solution Approach 1:
The interconnect device utilizes three-dimensional grooved channels formed within the interconnect body to optimize fuel and oxygen fluid distribution. This 3D channel network, rather than simple 2D surface features, enables enhanced power density and fuel utilization by improving fluid access to active areas, while the channels are integrated into the interconnect structure itself rather than requiring separate components.
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 modular interconnect device enhances power density and power efficiency by maintaining a fluid-tight seal and optimizing fluid flow, thereby overcoming the limitations of conventional solid oxide fuel cells.
Implementation Method 1
The grooved channels are formed in the upper main region of the upper major surface, and extend through the first inlet region to terminate at a plurality of first inlet ports and further through the first outlet region to terminate at a plurality of first outlet ports
Implementation Method 2
formed with a first inlet depression area that is recessed from the upper major surface downwardly and inwardly so as to form front and rear boundary wall surfaces spaced apart from each other in a transverse direction
Data Source
AI summary
A modular planar interconnect device for a solid oxide fuel cell includes a planar interconnect body, a pair of upper shielding plates, and a pair of lower shielding plates. The upper shielding plates are configured to be respectively fitted between front and rear boundary wall surfaces of a first inlet region of the planar interconnect body and between front and rear boundary wall surfaces of a first outlet region of the planar interconnect body. The lower shielding plates are configured to be respectively fitted between right and left boundary wall surfaces of a second inlet region of the planar interconnect body and between right and left boundary wall surfaces of a second outlet region of the planar interconnect body.