Electrochemical Cell Frame Assembly with Anti-Bulge Separator Plate
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Solution Overview
Problem
Existing frame assemblies for electrochemical cells face challenges in securely positioning and retaining flow fields relative to the membrane electrode assembly (MEA), particularly in preventing bulging or expansion under internal pressure, which can lead to assembly complexity and increased costs due to the need for numerous fasteners.
Innovation Solution
The introduction of a cell frame assembly with a separator plate featuring raised features that interface with receiving features on the frames, providing structural reinforcement and preventing translation, thereby reducing the need for extensive fastening and enhancing assembly stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional frame assemblies use numerous fasteners to secure frames and prevent bulging, then structural stability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The separator plate is merged with the frame structure by integrating raised features directly into the separator plate that engage with receiving features on the frames. This combination eliminates the need for separate fasteners and reduces assembly complexity while maintaining structural stability.
Solution Approach 2:
The separator plate incorporates localized raised features at specific positions where structural reinforcement is needed. These raised features provide targeted anti-bulge support and positioning functionality without requiring fasteners across the entire frame assembly, thereby reducing overall device complexity.
2Manufacturing precision
If traditional frame assemblies use numerous fasteners to secure frames, then positioning accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The positioning functionality previously requiring separate fasteners is merged into the separator plate through integrated raised features. This reduces the number of components and assembly steps, lowering manufacturing cost while maintaining positioning accuracy through the precise engagement of raised and receiving features.
Solution Approach 2:
The raised features on the separator plate automatically provide positioning and securing functions when the assembly is constructed. The features self-align and engage with receiving features on the frames, eliminating the need for additional fastening operations and reducing manufacturing complexity.
3Reliability
If traditional frame assemblies use extensive fastening to prevent bulging, then structural integrity is improved, but assembly time increases
Solution Approach 1:
The anti-bulge and positioning functions are merged into the separator plate structure through raised features, eliminating the need for multiple fastening operations. This single-integration approach maintains structural integrity while significantly reducing assembly time.
Solution Approach 2:
The raised features on the separator plate automatically perform the anti-bulge and positioning functions during assembly without requiring additional fastening steps. The features engage with receiving features on the frames to provide structural support and prevent bulging, thereby increasing assembly productivity.
Data Source
AI summary
Frame assemblies for use in locating and positioning flow fields in an electrochemical cell stack are provided. The frame assemblies may have a separator plate that is interposed between two frames. The separator plate may have one or more raised features positioned around or on either side of flow field regions of the separator plate that are defined by flow field apertures through the frames. The one or more raised features may extend into corresponding receiving features in one or both frames. The raised feature(s) may thus couple the frames to the separator plate and stiffen the frame assembly so as to prevent or reduce potential flexure of the frames due to pressures that develop within the flow field apertures. Various approaches are disclosed.