Electrochemical Cell Stack Sealing With Metal Gas Introduction Space
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Solution Overview
Problem
Conventional electrochemical cell units face issues with gas leakage and breakage due to the lack of a robust sealing mechanism and sufficient durability, especially when exposed to temperature changes, and they require complex configurations and expensive materials for high-performance operation.
Innovation Solution
The electrochemical cell stack features a flat plate type membrane electrode assembly with a metal outer peripheral part forming a gas introduction space and an attachment base with an insulating fixing part, which prevents gas leakage and breakage by absorbing thermal stress and eliminating the need for a fastening mechanism, while allowing for efficient gas supply and collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional flat plate type cell unit is used, then gas sealing property and electric contact resistance are improved by applying load, but a large-sized fastening member is needed which increases cost
Solution Approach 1:
The patent replaces the mechanical fastening system with a self-supporting cylindrical structure. The cylindrical outer peripheral part inherently maintains the gas introduction space and provides sealing without requiring external fastening members, thus eliminating the need for large-sized fastening components while maintaining gas sealing reliability
Solution Approach 2:
The patent changes the geometric parameters of the cell unit by adopting a cylindrical configuration. This structural parameter change allows the cell to maintain its shape and sealing properties through its own geometry rather than requiring external mechanical fastening, thereby reducing device complexity while preserving reliability
2Device complexity
If a cylindrical flat plate type cell unit is used, then structure is simplified without fastening load, but gas leakage and breakage cannot be prevented sufficiently
Solution Approach 1:
The patent employs composite material construction where the outer peripheral part is made of metal material providing structural strength and sealing, while the membrane electrode assembly contains the electrolyte membrane and electrode layers. This composite structure prevents gas leakage through the metal outer peripheral part while maintaining the electrochemical functionality, thereby improving reliability without increasing structural complexity
Solution Approach 2:
The metal outer peripheral part acts as a protective barrier that prevents breakage of the internal membrane electrode assembly. By providing this protective enclosure beforehand, the patent prevents damage from external stresses while maintaining the simplified cylindrical structure
3Reliability
If metal outer peripheral part is used to form gas introduction space, then gas leakage is prevented and durability is enhanced, but structure becomes more complex
Solution Approach 1:
The metal outer peripheral part performs multiple functions simultaneously: it forms the gas introduction space, provides structural support, prevents gas leakage, and protects the internal components. By consolidating these functions into a single component, the patent enhances durability without significantly increasing structural complexity
Solution Approach 2:
The patent merges the functions of the outer peripheral part with the gas introduction manifold by making the outer peripheral part itself the gas introduction space. This integration eliminates the need for separate gas distribution components, thereby enhancing durability through the metal construction while maintaining structural simplicity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents gas leakage and breakage, enhances durability, and simplifies the structure, enabling efficient power generation with improved thermal management and reduced costs.
Implementation Method 1
an outer peripheral part made of a metal material that surrounds an outer periphery of the first electrode layer together with the interconnector and the electrolyte membrane to form a gas introduction space for guiding internal gas to the first electrode layer
Implementation Method 2
an attachment base part having a fixing part made of an electrically insulating member and fixes the units in which the second current collector of a first one of adjacent two of the units and the interconnector of a second one of the adjacent two of the units are electrically connected
Data Source
AI summary
An electrochemical cell unit according to the present disclosure includes a flat plate type membrane electrode assembly having a structure in which an electrolyte membrane, a first electrode layer disposed on a first surface of the electrolyte membrane, and a second electrode layer disposed on a second surface of the electrolyte membrane are laminated; a first current collector in contact with the first electrode layer of the membrane electrode assembly; an interconnector electrically connected to the first current collector, a second current collector in contact with the second electrode layer of the membrane electrode assembly; and an outer peripheral part made of a metal material that surrounds an outer periphery of the first electrode layer together with the interconnector and the electrolyte membrane to form a gas introduction space for guiding internal gas to the first electrode layer.