Fuel Cell Separator Gasket Width Variation for Adhesive Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The adhesive durability of gaskets in fuel cell separators is compromised by high temperatures generated in the power generation area, leading to potential leakage issues due to reduced adhesiveness, especially in areas exposed to high-temperature cooling media.
Innovation Solution
The separator design features gasket portions with increased width in areas prone to high temperatures, specifically adjacent to the ends of the separator center area, to enhance adhesive durability, and these gasket portions can be integrally molded with side flow suppressing or additional parallel portions to further improve durability without requiring separate members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gasket is provided on the separator to suppress leakage of cooling medium and reactive gas, then sealing performance is improved, but adhesive durability is reduced due to high temperature exposure
Solution Approach 1:
The gasket is designed with non-uniform width where the first gasket portion adjacent to the separator center area has a greater width than the second gasket portion. This local quality variation provides enhanced adhesive durability in the high-temperature region while maintaining adequate sealing elsewhere.
Solution Approach 2:
The gasket is divided into multiple portions (first gasket portion and second gasket portion) with different widths. The first gasket portion is specifically designed to be wider to compensate for adhesive degradation in the high-temperature zone near the separator center area.
2Duration of action of stationary object
If the gasket width is increased in high-temperature areas to improve adhesive durability, then adhesive durability is improved, but device complexity increases
Solution Approach 1:
The gasket is integrated as a single molded piece with varying width portions rather than using multiple separate components. This merging approach achieves the required adhesive durability through geometric variation while maintaining manufacturing simplicity and avoiding assembly complexity.
Data Source
AI summary
A separator that is used for a fuel cell includes: a separator center area that is arranged to face a power generation area of the membrane electrode assembly; an outer peripheral portion that is extended from the separator center area to outer periphery; a first manifold hole and a second manifold hole that are provided in the outer peripheral portion; a fluid flow path that is arranged to extend from the first manifold hole through the separator center area to the second manifold hole; and a gasket that is provided on the outer peripheral portion to surround an area of the fluid flow path and outer circumferences of the first and second manifold holes. The gasket is divided into first gasket portions that are provided adjacent to ends of the separator center area and are extended along respective side edges at the ends, and second gasket portions that are provided to surround the outer circumferences of the first manifold hole and the second manifold hole, respectively. The first gasket portions have a larger width than a width of the second gasket portions.