Fuel Cell Manifold Truss Reinforcement for Pressure Drop Reduction
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Solution Overview
Problem
High cathode gas flow fuel cell systems face pressure drops and uniformity issues due to compact design limitations, requiring improved manifold designs and reinforcement to handle increased gas flow rates effectively.
Innovation Solution
The fuel cell system incorporates a truss structure attached to the manifolds for reinforcement, along with additional flow-through end plates and external ducts to manage higher pressure and gas flow rates, ensuring uniform gas distribution and reduced pressure drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fuel cell system uses a compact design to reduce space, then the system size is reduced, but the cathode gas flow area is insufficient leading to increased pressure drops
Solution Approach 1:
The patent adds truss structures to the three-dimensional manifold assembly, introducing structural reinforcement in additional spatial dimensions. This allows the compact manifold to maintain structural integrity and achieve higher pressure capability without increasing the overall system volume, thereby resolving the contradiction between compact design and pressure drop reduction
2Productivity
If the cathode gas flow rate is increased to improve productivity, then the gas flow rate is increased, but the uniformity of flow to each cell deteriorates
Solution Approach 1:
The patent modifies the manifold design parameters including adding truss structures and adjusting the configuration of flow distribution channels. These parameter changes enable the manifold to maintain uniform flow distribution to each cell even at higher gas flow rates, resolving the contradiction between productivity improvement and flow uniformity maintenance
3Stress or pressure
If the manifold is designed to handle higher pressure to increase gas flow capability, then the pressure capability is increased, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent divides the reinforcement structure into separate truss components that can be attached to the manifold rather than integrating complexity into the manifold itself. This segmentation allows the pressure capability to be enhanced while keeping the manufacturing process manageable through modular assembly
Data Source
AI summary
A fuel cell system includes a fuel cell stack including a plurality of fuel cells positioned between opposing end plates, an anode manifold configured to direct anode gas into or out of the fuel cell stack, a cathode manifold configured to direct cathode gas into or out of the fuel cell stack, and at least one truss attached to an external surface of at least one of the cathode manifold or the anode manifold. The at least one truss is configured to reinforce the fuel cell system.