Fuel Cell Stack Clamping for Layer Separation Without Gasket Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The recycling of fuel cell stacks is hindered by the difficulty in separating membrane electrode assemblies (MEAs) from bipolar plate components due to increasing adhesion and corrosion, leading to valuable material loss and inefficiencies in the disassembly process.
Innovation Solution
A cell stack fixing device with a movable clamping mechanism that applies pressure at varying points based on the position of a separating element, ensuring the stack remains fixed during separation, allowing for smooth and efficient disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cell stack is fixed rigidly to the support plate, then stability during separation is improved, but stress on the gasket increases causing damage
Solution Approach 1:
The fixing mechanism is segmented into discrete fixing elements distributed across the support plate rather than a single rigid connection. These individual fixing points allow localized stress distribution while maintaining overall stack stability during separation processes.
Solution Approach 2:
The fixing elements are designed to change their mechanical parameters (flexibility, contact pressure) based on operational conditions. They provide rigid fixation when stability is needed but allow movement or deformation when stress would otherwise damage the gasket, adapting between these states during the separation process.
2Strength
If the cell stack is allowed to move freely on the support plate, then stress on the gasket is reduced, but positioning precision deteriorates
Solution Approach 1:
The fixing elements act as intermediaries between the cell stack and support plate. They provide the necessary positioning precision through controlled contact points while simultaneously protecting the gasket by mediating stress forces, preventing direct rigid transmission that would cause damage.
3Stability of the object's composition
If multiple fixing elements are used to improve stability, then stability during separation is improved, but device complexity increases
Solution Approach 1:
The fixing device uses multiple identical or similar fixing elements arranged in a pattern across the support plate. This copying approach provides enhanced stability through distributed fixation points while avoiding the complexity of designing and manufacturing multiple different types of fixing mechanisms.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a cell stack fixing device (12; 12') for fixing a cell stack (16), in particular an electrochemical cell, during a process of separating cell layers of the cell stack (16) that adhere to one another, in which process a separating element (14) is passed through the cell stack (16), in particular the entire cell stack, between the cell layers of the cell stack (16) that adhere to one another, said device comprising: a cell stack receiving unit (18) for receiving the cell stack (16); and a fixing unit (20; 20') which is designed to press the received cell stack (16) against the cell stack receiving unit (18) at different fixing regions (22) in the stacking direction (24) depending on a relative position of the separating element (14) with respect to the received cell stack (16) in order to keep the received cell stack (16) fixed while the separating element (14) is passed therethrough, in particular while it is passed completely therethrough.