Fuel Cell Separator Unit With Clip Gasket for Airtight Interfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fuel cell stacks face issues with airtightness due to gaps in the interface between components, particularly where the sub gasket of the electricity-generating assembly contacts the anode or cathode separator, leading to reduced stability and increased space occupation by dual gasket configurations.
Innovation Solution
A separator unit with a clip-shaped reaction surface gasket that clamps the edge of the electricity-generating assembly, forming airtight lines with adjacent separators, reducing the need for multiple gaskets and minimizing gaps, while maintaining airtightness at all interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual gasket configuration is used to ensure airtightness at all interfaces, then airtight stability is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent merges the functions of multiple separate gaskets into a single integrated reaction surface gasket that performs multiple sealing functions. This single gasket structure replaces the conventional dual gasket configuration, simplifying the overall structure while maintaining airtightness at all interfaces including the electricity-generating assembly contacts.
Solution Approach 2:
The reaction surface gasket is designed with multi-functionality, serving as both the primary sealing element and the structural component that contacts the electricity-generating assembly. This universal gasket performs multiple functions simultaneously: sealing the reaction surface, providing mechanical contact support, and ensuring airtightness at interface gaps, thereby eliminating the need for separate dual gasket configurations.
2Reliability
If a dual gasket configuration is used to ensure airtightness at all interfaces, then airtight stability is improved, but the overall size of the fuel cell stack increases
Solution Approach 1:
By combining multiple gasket functions into a single reaction surface gasket, the patent reduces the cumulative volume occupied by gasket components. This integration eliminates the space required for dual separate gasket configurations while maintaining comprehensive airtight sealing across all interfaces in the fuel cell stack.
3Reliability
If dual gasket configurations are used, then airtightness is maintained, but the reaction area is reduced due to increased space occupation
Solution Approach 1:
The integration of multiple sealing functions into a single reaction surface gasket reduces the total space occupied by gasket components. This space consolidation directly increases the available reaction area within the fuel cell stack, as fewer separate gasket elements are needed to achieve the same airtight sealing performance.
4Reliability
If dual gasket configurations are used, then airtightness is maintained, but manufacturing costs increase due to more injection material
Solution Approach 1:
By merging multiple gasket functions into a single reaction surface gasket, the patent reduces the total quantity of injection material required. This single integrated gasket structure eliminates the need for separate dual gasket configurations, thereby reducing material consumption and manufacturing costs while maintaining comprehensive airtight sealing.
Data Source
AI summary
A unit cell for a fuel cell includes an electricity-generating assembly (EGA) in which a gas diffusion layer (GDL) is laminated on each of both sides of a membrane electrode assembly (MEA). The unit cell has a first separator and a second separator disposed on an outside of the EGA and a reaction surface is formed on each of the first and second separators through which a reactive gas flows. A cooling surface is formed on each of the first and second separators opposite the reaction surfaces and through which cooling water flows. A reaction surface gasket is formed on the reaction surface of the first separator, wrapping and fixing a top and bottom of the EGA, and forming an airtight line with the second separator. A cooling surface gasket is formed on the cooling surface of the first separator and forms an airtight line with a second separator of another unit cell disposed adjacent to the unit cell.