Fuel Cell Membrane Electrode Assembly Rigidity via Porous Film Lamination
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Solution Overview
Problem
The existing fuel cell technology faces challenges in handling and assembling membrane electrode assemblies due to their thin and flexible nature, which makes them prone to warping and difficult to transport and insert between gas supply layers.
Innovation Solution
A fuel cell design featuring a membrane electrode assembly with interconnecting sections extending in a specific direction, enclosed within a laminate layer formed by anode and cathode side porous films, providing rigidity and preventing warpage, while also reducing internal resistance through optimized film configurations and breathing holes for gas supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the electrolyte membrane is made thin to reduce size and improve flexibility, then the membrane electrode assembly becomes more flexible and easier to conform to surfaces, but it becomes too soft and warps when held or transported
Solution Approach 1:
The patent applies composite materials by combining the thin electrolyte membrane with porous films having different functionalities. The porous films provide structural support and rigidity to the thin membrane, preventing warpage during handling and transport while maintaining the membrane's thin profile for flexibility and performance.
Solution Approach 2:
The patent uses thin film structures for the porous films that cover the membrane electrode assembly. These thin films provide the necessary mechanical support and rigidity to prevent warpage of the thin electrolyte membrane, while still allowing gas permeability through their porous structure.
2Ease of manufacture
If the membrane electrode assembly is made flexible and thin, then it can be easily manufactured and assembled in planar configurations, but it becomes difficult to handle, transport, and insert between gas supply layers
Solution Approach 1:
The composite structure of the membrane electrode assembly with porous films provides both the flexibility needed for easy manufacturing and assembly in planar configurations, and the rigidity needed for easy handling and transport. The porous films act as structural reinforcements that do not interfere with the assembly process.
Solution Approach 2:
The patent segments the membrane electrode assembly into distinct functional layers (electrolyte membrane, porous films with different properties) that can be manufactured separately and then assembled together. This segmentation allows each layer to be optimized for its specific function while working together as an integrated unit that is both easy to manufacture and easy to handle.
3Strength
If porous films are added to enclose the membrane electrode assembly, then rigidity and shape stability are improved, but device complexity increases
Solution Approach 1:
The patent uses composite materials where porous films are integrated with the membrane electrode assembly to provide rigidity and shape stability. The porous films are designed with specific properties (porosity, thickness, material composition) that provide structural support while maintaining gas permeability, thus adding functionality without excessive complexity.
Solution Approach 2:
The porous films serve multiple functions: they provide structural support and rigidity to prevent warpage, act as gas diffusion layers, and serve as protective enclosures for the membrane electrode assembly. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving the desired rigidity.
Data Source
AI summary
Electrolyte membrane electrode structures that constitute a fuel cell according to the present invention have a staggered arrangement wherein a part of an anode electrode faces a part of one of two adjacent cathode electrodes, with an electrolyte membrane being interposed therebetween, and another part of the anode electrode faces a part of the other cathode electrode, with an interconnect part being interposed therebetween, said interconnect part being formed in the electrolyte membrane. The electrolyte membrane electrode structures are sealed in a laminate layer which is obtained by bonding an anode-side porous film that covers the anode electrode and a cathode-side porous film that covers the cathode electrodes with each other.