Electrolyser Cell Frame Sealing Design
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Solution Overview
Problem
Existing alkaline water electrolyser cell frame designs are complex and costly, with differences between anode and cathode frames, and suffer from internal leakage and manufacturing complexities.
Innovation Solution
A simplified cell frame assembly using a single gasket with each cell frame for sealing, combined with a cell frame design that allows for easy adaptation to different cell element thicknesses, reducing manufacturing complexity and internal leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sealing elements are used to seal the cell frame, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sealing functions into a single integrated gasket structure. The gasket includes a first sealing portion for sealing the cell frame to the outer environment and a second sealing portion for sealing between adjacent cells, merging what would traditionally require multiple separate sealing elements into one unified component.
Solution Approach 2:
The single gasket structure performs multiple sealing functions simultaneously - it seals the cell frame to the external environment and also seals between adjacent cells. This multi-functional design eliminates the need for separate sealing elements while maintaining comprehensive sealing coverage.
2Adaptability or versatility
If different cell frames are used for anode and cathode sides, then functional requirements are met, but manufacturing cost increases
Solution Approach 1:
The cell frame is designed as a universal structure that can be used on both anode and cathode sides. The frame includes functional features such as receiving openings for cell membranes and pathways for electrolyte discharge that are applicable to both electrode types, eliminating the need for separate anode and cathode specific frames.
Solution Approach 2:
The cell frame is divided into distinct functional portions - a first portion for the anode side and a second portion for the cathode side, with each portion having specific features adapted to its electrode type. This segmentation allows a single frame design to accommodate both electrode configurations.
3Strength
If elastic and rigid materials are combined in cell frame, then mechanical stability is improved, but manufacturing complexity increases
Solution Approach 1:
The cell frame combines elastic material portions and rigid material portions into a unified structure. The elastic portions provide flexibility for sealing and accommodation of dimensional changes, while the rigid portions provide structural stability and mechanical strength, creating a composite structure that leverages the advantages of both material types.
4Stress or pressure
If additional pressure tank is added to enclose electrolytic cell block, then compression and insulation are improved, but device complexity increases
Solution Approach 1:
The cell frame serves multiple functions including providing mechanical compression to the cell components, offering insulation, and eliminating the need for separate pressure tanks. The frame's structural design inherently provides the compression and insulation functions that would otherwise require additional dedicated components.
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
The solution reduces the complexity and cost of cell frame fabrication, enhances sealing efficiency, and simplifies the assembly process of the alkaline electrolyser, minimizing the risk of leaks and improving operational efficiency.
Implementation Method 1
The gasket is compressible between the cell frame and the cell element
Implementation Method 2
The gasket deforms under compression to conform to the sealing surfaces
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
The present invention discloses an electrolyser cell frame assembly comprising a cell frame with an inner peripheral edge and an outer peripheral edge; a gasket with an inner peripheral edge and an outer peripheral edge; and a cell element with a peripheral edge compressed between the gasket and the cell frame. The gasket exhibits compressible characteristics whereas the cell frame exhibits rigid characteristics. The outer peripheral edge of the gasket extends outwards over the peripheral edge of the cell element in the direction of the outer peripheral edge of the cell frame such that the gasket overlaps a predefined part of the cell frame.