Fuel Cell Flow Plate Porous Layer Manufacturing
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Solution Overview
Problem
Existing methods for producing flow plates for fuel cells with gas guide ribs and porous, electrically conductive layers are inefficient, requiring additional metal elements and complex manufacturing processes, leading to increased costs and material usage.
Innovation Solution
A method that generates the geometry and structure of a porous, electrically conductive layer unit directly on gas guide ribs during material application, using coating, spray, or 3D printing methods, eliminating the need for metal foams and simplifying the manufacturing process, while allowing for levelled surfaces and catalyst introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional metal elements (metal foams) are used to create porous layers on gas guide ribs, then electrical conductivity and porosity are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the metal foam element from the flow plate structure. Instead of using separate metal foam components attached to gas guide ribs, the invention integrates the porous electrically conductive layer directly onto the ribs through coating or spraying methods, thereby removing the need for additional metal elements while maintaining electrical conductivity and porosity functions
Solution Approach 2:
The patent merges the gas guide rib structure with the porous electrically conductive layer into a single integrated component. The layer is applied directly onto the ribs during manufacturing, combining what were previously separate elements (ribs + metal foam) into one unified structure, simplifying both design and manufacturing
2Quantity of substance
If additional metal elements (metal foams) are used to create porous layers on gas guide ribs, then porosity is improved, but material usage and cost increase
Solution Approach 1:
The patent removes the metal foam material requirement from the process. The porous layer is created using coating or spraying of electrically conductive materials that form the required porosity without needing bulky metal foam components, thereby reducing overall material consumption
Solution Approach 2:
The patent changes the physical state and application method of the porous layer material. Instead of using pre-formed metal foam blocks or sheets, the material is applied as a coating or spray that can be controlled to achieve the desired porosity and thickness, optimizing material usage
3Reliability
If complex manufacturing processes with additional elements are used, then flow plate functionality is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple manufacturing steps into a more integrated process. The porous electrically conductive layer is applied directly onto the gas guide ribs in situ during manufacturing, eliminating separate steps for attaching pre-made metal foam components, thereby reducing labor and assembly costs
Solution Approach 2:
The patent replaces mechanical assembly operations (attaching metal foams to ribs) with deposition processes (coating or spraying). This substitution eliminates the need for mechanical fastening, alignment, and bonding operations, simplifying the manufacturing process and reducing costs
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 approach reduces manufacturing costs and complexity, saves material, and enhances the flow plate's functionality by enabling efficient electrical contact and improved porosity, resulting in a more cost-effective and efficient production of fuel cell flow plates.
Implementation Method 1
the layer unit be applied at least in part to the gas guide ribs using a coating method
Implementation Method 2
the layer unit be applied at least in part to the gas guide ribs using a spray method
Data Source
AI summary
The invention relates to a method for producing a flow plate (10, 28) for a fuel cell (12), comprising a plurality of gas guide webs (14) and at least one electrically conductive and porous layer unit (16) arranged on the gas guide webs (14). It is proposed that a geometry and/or a structure of the layer unit (16) is produced during a material application onto the gas guide webs (14).