Articulated Gas Diffusion Unit Sealing for Fuel Cell Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas diffusion units for fuel cells face challenges in reliable sealing during assembly, leading to potential leakage and efficiency degradation due to misalignment of gas diffusion layers and reaction layers.
Innovation Solution
A gas diffusion unit with articulated planar gas diffusion layers and seals configured on their edges, allowing for precise alignment and interconnection via a connection strip or crosspieces, using elastic or thermoplastic materials, and manufacturing methods like injection molding to ensure effective sealing without additional elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If seals are injection molded onto the planar gas diffusion layer, then the seal structure is simplified, but mutual alignment of gas diffusion layers and reaction layers becomes difficult during assembly
Solution Approach 1:
The gas diffusion layers are designed with articulated connection that enables relative movement (swiveling) during assembly. This dynamic capability allows the layers to self-align with the reaction layer and bipolar plate during the assembly process, solving the alignment precision problem while keeping the seal structure simple through injection molding.
2Manufacturing precision
If gas diffusion layers are rigidly connected, then alignment precision is maintained, but assembly complexity increases
Solution Approach 1:
Instead of rigid connection, the patent employs articulated connection that provides controlled movement during assembly. The swivel axis allows the gas diffusion layers to move relative to each other to achieve proper alignment, then maintains the aligned position. This reduces assembly complexity compared to rigid connections while preserving alignment precision.
3Reliability
If additional elements are used for connection, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the seal and the connection function into a single integrated structure. The seal is injection molded onto the gas diffusion layer and simultaneously provides the articulated connection through its geometric design. This merging eliminates the need for separate connection elements, reducing device complexity while maintaining connection reliability through the unified structure.
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 simplifies assembly, ensures reliable sealing, and allows for compact fuel cell design, preventing leakage and improving sealing action while being cost-effective and adaptable for various production volumes.
Implementation Method 1
The seals may be made of an elastic polymer material. Elastomer materials are elastic, highly deformable and readily workable.
Data Source
AI summary
A gas diffusion unit for a fuel cell, having at least two planar gas diffusion layers on whose edges seals are configured, at least two gas diffusion layers being joined together in an articulated manner.