Fuel Cell Separator With Inclined Guide Holes for MEA Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel cell stacks face challenges in maintaining performance and operational efficiency due to insufficient cooling, which affects humidity management of the membrane electrode assembly, leading to overheating and reduced efficiency, especially in applications like aerial mobility vehicles.
Innovation Solution
Incorporating inclined guide holes in the separators to direct cooling gas into reaction channels, allowing direct contact with the membrane electrode assembly, and using protrusion patterns to enhance cooling efficiency and manage condensate water discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If air-cooled cooling method is used to reduce weight, then weight of the aerial mobility vehicle is reduced, but cooling performance and efficiency deteriorate
Solution Approach 1:
The separator is divided into multiple functional regions with different hole configurations. Cooling holes are provided in the first region to supply cooling gas directly to the membrane electrode assembly, while guide holes in the second region direct cooling gas along the separator surface. This segmentation allows efficient heat removal from critical areas without requiring a heavy water-cooled system throughout the entire structure.
Solution Approach 2:
The invention uses air (gas) as the cooling medium instead of liquid coolant. Cooling holes supply air to the membrane electrode assembly, and guide holes direct the airflow along the separator surface. This pneumatic cooling approach eliminates the need for heavy liquid coolant systems while maintaining effective heat dissipation.
2Temperature
If cooling gas flow rate is increased to improve cooling performance, then cooling efficiency is improved, but humidity of the membrane electrode assembly deteriorates
Solution Approach 1:
Different regions of the separator have different hole configurations tailored to local requirements. The first region has cooling holes that supply cooling gas directly to hot spots in the membrane electrode assembly, while the second region has guide holes that distribute cooling gas along the separator surface. This localized approach provides targeted cooling without excessive overall airflow that would dry out the membrane electrode assembly.
Solution Approach 2:
The separator acts as an intermediary structure that mediates between cooling requirements and humidity maintenance. By providing both cooling holes and guide holes in different regions, the separator distributes cooling gas in a controlled manner that removes heat from critical areas while maintaining appropriate humidity levels in the membrane electrode assembly.
3Temperature
If complex cooling structure is added to improve cooling performance, then cooling efficiency is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The cooling function is merged into the separator structure itself. Both cooling holes and guide holes are integrated directly into the separator, eliminating the need for separate cooling components or assemblies. This integration achieves effective cooling performance while maintaining simple device structure and reducing manufacturing complexity.
Solution Approach 2:
The separator serves multiple functions: it provides structural support, defines flow channels, and incorporates cooling functionality through integrated cooling holes and guide holes. This multi-functionality eliminates the need for additional dedicated cooling components, simplifying the overall device structure while maintaining effective cooling performance.
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
Improves cooling performance and operational efficiency by maintaining appropriate humidity, preventing overheating and flooding, and reducing structural deformation and manufacturing costs.
Implementation Method 1
a cooling channel disposed on the other surface of the first separator and configured to allow a cooling gas to flow therethrough
Implementation Method 2
inclined guide holes formed through the first separator and inclined with respect to a thickness direction of the first separator, the inclined guide holes each having one end communicating with the cooling channel, and the other end communicating with the reaction channel
Implementation Method 3
allowing direct contact with the membrane electrode assembly
Data Source
AI summary
An embodiment of the present disclosure relates to a fuel cell stack including a membrane electrode assembly (MEA), a first separator stacked on the MEA and including a reaction channel disposed on one surface of the first separator facing the MEA and configured to allow a reactant gas to flow therethrough, and a cooling channel disposed on the other surface of the first separator and configured to allow a cooling gas to flow therethrough, and inclined guide holes formed through the first separator and inclined with respect to a thickness direction of the first separator, the inclined guide holes each having one end communicating with the cooling channel, and the other end communicating with the reaction channel, thereby obtaining an advantageous effect of improving performance and operational efficiency.