Ceramic Fuel Cell Strip Bundle Repair Method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High temperature fuel cell stacks face durability issues due to component breakdown and corrosion, leading to reduced lifespan, with current methods requiring replacement of entire strips even if only a portion is defective, resulting in wastefulness and increased costs.
Innovation Solution
A method for repairing fuel cell strips by identifying and replacing defective bundles within the strip, using cutting guides on fuel feed and outlet pipes to safely disconnect and reconnect components, minimizing waste and cost impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If entire fuel cell strips are replaced when defects are detected, then reliability is improved, but loss of substance and cost increase due to replacing functional components
Solution Approach 1:
The fuel cell strip is divided into separable bundles, each bundle containing multiple fuel cells. This segmentation allows defective bundles to be identified and replaced independently, while functional bundles remain in service. The cutting guides enable precise separation at bundle boundaries, facilitating selective replacement without affecting other bundles.
Solution Approach 2:
Defective bundles are extracted from the fuel cell strip for replacement, while functional bundles are retained. The cutting guides facilitate this extraction by providing precise cutting locations that separate defective bundles from the main strip, allowing removal of only the problematic sections.
2Reliability
If entire fuel cell strips are replaced when defects occur, then reliability is improved, but loss of time and productivity decrease due to complete replacement processes
Solution Approach 1:
The fuel cell strip is divided into separable bundles, enabling parallel processing where defective bundles are replaced while functional bundles remain operational. This segmentation reduces the overall replacement time compared to replacing the entire strip.
Solution Approach 2:
Instead of replacing the entire fuel cell strip, only the defective bundles are replaced. This partial action approach maintains sufficient functionality during the repair process and reduces the time required for complete replacement.
3Ease of repair
If cutting guides are added to fuel pipes, then ease of repair is improved, but device complexity increases due to additional components
Solution Approach 1:
Cutting guides are pre-positioned on the fuel pipes during manufacturing, indicating the exact locations where cuts should be made for bundle removal. This preliminary marking simplifies the repair process by eliminating the need for complex measurement and positioning during maintenance operations.
Data Source
AI summary
There is disclosed a method and components for repairing a fuel cell stack. In particular, the method and components relate to repairing a high temperature fuel cell stack incorporating ceramic components. The method includes identifying a fuel cell bundle within a fuel cell strip to be disconnected from the fuel cell strip, identifying at least one fuel feed pipe portion connected to the fuel cell bundle, and identifying at least one fuel outlet pipe portion connected to the fuel cell bundle. A cutting blade is positioned on the fuel feed pipe portion and cutting through the fuel feed pipe portion, and similarly for the fuel outlet pipe portion. The fuel cell bundle is then removed, and a replacement inserted in its place.