Electrochemical Cell Bipolar Plate Segmented Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrochemical cell systems face challenges in maintaining effective sealing at high operating pressures, which can lead to leaks and reduced efficiency over time.
Innovation Solution
The design incorporates bipolar plates with non-continuous sealing features, such as slots or ridges with overlapping ends, that extend around the perimeter of fluid flow regions to enhance sealing and mechanical support, while allowing for uniform compression and improved fluid flow management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional continuous sealing features are used in bipolar plates, then sealing effectiveness is maintained, but mechanical creep of gasket materials occurs over time at high pressures
Solution Approach 1:
The continuous sealing feature is divided into multiple discrete segmented sealing features arranged in a pattern around the fluid flow region. This segmentation prevents uniform compression that causes gasket creep while maintaining effective sealing through the distributed arrangement of sealing elements.
2Reliability
If bipolar plates are designed with sealing features, then sealing is improved, but fluid flow management becomes more complex
Solution Approach 1:
The bipolar plate is designed with different features in different locations: segmented sealing features in the sealing region and continuous flow channels in the fluid flow region. This local differentiation allows the plate to provide both sealing and efficient fluid flow management without compromising either function.
3Power
If bipolar plates operate at sustained high pressures, then power density is increased, but sealing effectiveness deteriorates over time
Solution Approach 1:
The segmented sealing features are designed to distribute and dynamically adapt to compression forces at high operating pressures. The discrete segmentation allows the sealing features to maintain contact with the gasket material without creating stress concentration points that would lead to sealing failure over time.
Data Source
AI summary
A bipolar plate for an electrochemical cell having a first side with a first fluid flow region bordered by a first sealing region, and a second side with a second fluid flow region bordered by a second sealing region is disclosed. The first and second sealing regions each include a plurality of non-continuous sealing features having overlapping ends that extend around the perimeter of the respective fluid flow region.