Fuel Cell Flow Plate Supporting Frame Design
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Solution Overview
Problem
The deformation and collapse of fluid channels in fuel cell flow plates due to assembly forces hinder fluid flow and separate membrane electrode assemblies (MEAs) and gas diffusion layers (GDLs) when fuel cells are stacked, affecting the operating stability and reliability of the fuel cell stack.
Innovation Solution
A fluid flow plate design featuring a main body with converging fluid channels and an annular supporting frame that frames the channels, providing structural integrity and strength by attaching tightly to the main body, preventing deformation and collapse during assembly and ensuring uniform fluid distribution across the fuel cell stack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fuel cells are stacked into a fuel cell stack, then the fuel cell stack can be assembled and operated, but the fluid channels near the inlet and outlet may become deformed or collapse due to assembly forces
Solution Approach 1:
The supporting frame is pre-installed on the periphery of the opening in the fluid flow plate before the fuel cell assembly process. This preliminary structural reinforcement prevents the fluid channels from deforming or collapsing when assembly forces are applied during stack construction, thereby maintaining channel integrity while enabling successful assembly.
2Strength
If the fluid channels are reinforced with a supporting frame, then the structural integrity is improved, but the device complexity increases
Solution Approach 1:
The supporting frame is designed as a thin-walled annular structure with supporting walls that provide maximum structural reinforcement with minimal material. This thin-film approach strengthens the fluid flow plate and prevents channel collapse while adding minimal complexity to the overall device structure.
3Strength
If the supporting frame is tightly attached to the main body, then the structural strength is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The supporting frame includes an annular sealing ring that can deform elastically to accommodate variations in opening dimensions. This parameter change approach allows the frame to adapt to manufacturing tolerances through material elasticity rather than requiring precise dimensional control, thereby reducing manufacturing precision requirements while maintaining strong attachment.
Data Source
AI summary
A fluid flow plate of a fuel cell includes a main body and a supporting frame. The main body includes a plurality of fluid channels and an opening, wherein the fluid channels converge at the opening. The supporting frame, mounted on the periphery of the opening, is annular shaped and frames the fluid channels. The supporting frame includes a pair of supporting walls respectively disposed on two sides of the fluid channels.