Fuel Cell Flow Plate Shell Passageway for Gas-Tightness
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Solution Overview
Problem
Existing fuel cell fluid flow plates face challenges in maintaining gas-tightness and efficient fluid flow due to alignment issues and component dislocations during assembly, leading to potential leakage and crossover of reactant fluids.
Innovation Solution
A fuel cell fluid flow plate integrated with a shell passageway piece, featuring parallel faces connected by a through hole, allows for alignment and secure clipping with the fluid flow plate, ensuring unobstructed fluid flow through the use of a first and second manifold connected via flow channel openings, and a sealing member in grooves for enhanced gas-tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional fluid flow plate structure is used, then the structure is simple, but alignment issues and component dislocations occur during assembly leading to leakage and crossover of reactant fluids
Solution Approach 1:
The fluid flow plate is divided into a plate body and a separate shell passageway piece. The shell passageway piece contains the flow channels and is inserted into grooves on the plate body, creating modular segments that can be assembled with precise alignment features, thereby improving gas-tightness while maintaining manageable structural complexity
Solution Approach 2:
The shell passageway piece is nested within the plate body structure, with the shell inserted into grooves formed on the plate body surface. This nested configuration allows the flow channels to be housed within the overall plate structure, improving sealing while keeping the external dimensions compact
2Manufacturing precision
If the fluid flow plate is provided with flow channels directly on the plate body, then the structure is simple, but alignment issues occur during assembly causing component dislocations
Solution Approach 1:
The flow channels are pre-formed within the shell passageway piece before assembly, with alignment features such as positioning protrusions and grooves prepared in advance. This preliminary configuration of the shell allows for precise alignment during assembly without requiring complex real-time adjustments, thereby improving manufacturing precision while maintaining assembly ease
Solution Approach 2:
The shell passageway piece acts as an intermediary component between the plate body and the flow channel system. It provides a standardized interface with alignment features that mediate the connection, ensuring precise positioning and reducing assembly difficulties
3Reliability
If the entry and export of the flow channel are not supported, then the structure is simple, but the membrane electrode assembly and gas diffusion layers may come apart causing crossover of reactant fluid
Solution Approach 1:
Support structures are provided locally at critical positions such as the entry and export regions of the flow channels, rather than uniformly across the entire plate. This localized support reinforces areas prone to component separation while maintaining overall structural simplicity and minimizing additional complexity
Data Source
AI summary
A fluid cell fluid flow plate comprises: a fluid flow plate, having one face being a fluid flow face for receiving a reactive fluid and the other face being a non-active surface, provided with a first manifold, a second manifold, and a flow channel disposed on the fluid flow face; and a shell passageway piece, configured with parallel-disposed first face and second face that are connected to each other through a connecting face with at least one through hole provided thereon; wherein the flow channel being respectively connected to the first manifold through a first opening and to the second manifold through a second opening; and when the shell passageway piece and the fluid flow plate are combined, the first face contacts the fluid flow face, the second face contacts the non-active surface, and the first manifold communicates with the first opening by the through hole.