Fuel Cell Stack Manifold Fixation via Non-Element Part Sealing
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Solution Overview
Problem
Current fuel battery cell stack devices face challenges in securely fixing cells to manifolds and preventing gas leakage, leading to inefficiencies in reaction gas supply and potential breakage during power generation.
Innovation Solution
A cell stack device design featuring a manifold that supplies reaction gas to cells, with each cell comprising a fuel electrode layer, solid electrolyte layer, and air electrode layer, and a non-element part at both ends fixed to the manifold using a sealing material, ensuring secure alignment and gas containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cells are fixed to the manifold using conventional methods, then the structure is simple, but gas leakage occurs and fixation is insecure
Solution Approach 1:
The cell is divided into element part and non-element part, with the non-element part extending to both ends to provide additional fixation surfaces. This segmentation allows separate fixation zones that improve security without complicating the core electrochemical structure.
Solution Approach 2:
The non-element part is pre-formed as an extension of the cell structure, providing built-in fixation surfaces before assembly. This preliminary structural preparation enables secure mounting to the manifold without requiring additional complex fastening mechanisms.
2Reliability
If sealing material is used to fix cells to the manifold, then gas leakage is prevented, but manufacturing complexity increases
Solution Approach 1:
A sealing material is introduced as an intermediary substance between the non-element part and the manifold. This mediator creates effective gas containment while maintaining a relatively simple assembly process, as the sealing function is achieved through material selection rather than complex mechanical sealing structures.
3Strength
If the non-element part is extended to both ends of cells, then fixation area is increased, but cell volume increases
Solution Approach 1:
The non-element part is strategically extended only to the regions where fixation is needed (both ends of the cell), rather than uniformly increasing the entire cell volume. This localized extension provides maximum fixation area with minimal volume penalty.
Data Source
AI summary
A cell stack device according to the present disclosure includes: a cell stack comprising a plurality of cells; and a manifold configured to supply reaction gas to the plurality of cells, wherein each of the plurality of cells includes: an element part comprising: a fuel electrode layer that is located on the fuel electrode layer; a solid electrolyte layer that is located on the fuel electrode layer; a middle layer that is located on the solid electrolyte layer; and an air electrode layer that is located on the middle layer, the middle layer including: a first middle layer bonded to the solid electrolyte layer; and a second middle layer bonded to the air electrode layer; and a non-element part of the cell that comprises the entire cell excluding the air electrode layer, the non-element part located at least at a first of both ends of the plurality of cells in a longitudinal direction, and the plurality of cells is fixed to the manifold at least at the first end by a sealing material located between the manifold and either the solid electrolyte layer or the first middle layer.