PEM Fuel Cell Separator Plate with External Gas Ducting
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Solution Overview
Problem
Conventional proton-exchange membrane (PEM) fuel cells require bespoke separator plates with integrated manifold apertures for different stack sizes, increasing manufacturing complexity and costs, as well as limiting design flexibility due to the need for varying aperture sizes to ensure sufficient gas supply.
Innovation Solution
The use of separator plates without integrated manifold apertures, instead employing a separate ducting system to supply gases and coolant, allowing for a standard plate design that can accommodate various stack sizes by varying the ducting configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If integrated manifold apertures are used in separator plates, then gas supply to cells is achieved, but manufacturing complexity and costs increase for different stack sizes
Solution Approach 1:
The manifold function is segmented from the separator plate. Instead of integrating manifold apertures into each separator plate, the patent uses separate manifold components that connect to the separator plates. This allows the separator plates to be standardized while the manifold can be configured for different stack sizes, resolving the contradiction between manufacturing ease and adaptability.
Solution Approach 2:
The separator plate design is made universal by removing stack-size-specific manifold apertures. The standardized separator plate can be used across different stack configurations, while the manifold system adapts to provide the necessary gas supply for various stack sizes, achieving multi-functionality.
2Quantity of substance
If integrated manifold apertures are sized for large stacks, then sufficient oxygen supply is achieved, but the design cannot be used for smaller stacks efficiently
Solution Approach 1:
The system transitions from static, fixed aperture sizes in separator plates to a dynamic configuration where the manifold can be adjusted or configured for different stack sizes. This allows the oxygen supply quantity to match the actual stack size requirements, avoiding over-provisioning for small stacks while maintaining the capability for large stacks.
Solution Approach 2:
Instead of changing the physical aperture size in separator plates for different stack sizes, the patent changes the manifold configuration parameters. The separator plates maintain consistent design, while the manifold system's parameters (such as ducting size, number of connections) are adjusted to provide appropriate oxygen supply for different stack scales.
3Reliability
If bespoke separator plates are manufactured for each stack size, then gas supply requirements are met, but manufacturing costs increase
Solution Approach 1:
By segmenting the gas distribution function into separate manifold components rather than integrating it into each separator plate, the patent enables standardized separator plate manufacturing. This reduces manufacturing costs through economies of scale while maintaining reliable gas supply through the configurable manifold system.
Solution Approach 2:
The standardized separator plate design can be copied and used across multiple stack configurations without modification. This eliminates the need for costly bespoke manufacturing for each stack size while ensuring reliable gas supply through the adapted manifold system.
Data Source
AI summary
The present disclosure provides a separator plate suitable for use in a proton-exchange membrane fuel cell. Also provided is a fuel cell and an article including the separator plate. Further, the present disclosure provides a fuel cell stack where each fuel cell includes the separator plate. Additionally, a closed-cathode proton-exchange membrane fuel cell stack is disclosed.