Permeable Fuel Cell Support Infill for Uniform Coolant Flow
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Solution Overview
Problem
The direct contact between hydrogen and air plates in fuel cell stacks often leads to blockage of coolant microchannels, resulting in non-uniform thermal management and inefficient performance due to varying coolant flow rates.
Innovation Solution
A permeable support infill structure composed of sintered thermally conductive metal or ceramic powder particles is strategically positioned between the air and hydrogen plates to create a gap and facilitate coolant flow, preventing blockages and enhancing thermal conductivity between the plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If direct contact between hydrogen plate and air plate is maintained to ensure structural integrity, then structural stability is improved, but coolant flow is blocked and thermal management becomes non-uniform
Solution Approach 1:
A permeable support infill structure is introduced as an intermediary component between the hydrogen plate and air plate. This infill structure maintains the structural connection and spacing between plates while allowing coolant to flow through its porous network, thereby preventing flow blockage and ensuring uniform thermal management without compromising structural integrity.
Solution Approach 2:
The support infill structure is made from porous material with controlled porosity (e.g., sintered metal or ceramic powder particles). The porous nature allows coolant to pass through the infill structure while the material itself provides mechanical support and maintains the required spacing between plates, resolving the contradiction between structural stability and coolant flow uniformity.
2Reliability
If permeable support infill structure is added to prevent flow blockage, then coolant flow uniformity is improved, but device complexity increases
Solution Approach 1:
The use of porous materials such as sintered metal or ceramic powder particles provides an effective solution with relatively simple implementation. The porous structure naturally allows coolant penetration while maintaining mechanical support, achieving flow uniformity without requiring complex multi-component assemblies or sophisticated manufacturing processes.
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 solution ensures consistent and uniform thermal management throughout the fuel cell stack, leading to enhanced and consistent performance by maintaining optimal coolant flow and reducing thermal inefficiencies.
Implementation Method 1
The sintered metal powder is configured to facilitate coolant flow therethrough and define a thermally conductive path between the air layer and the hydrogen layer
Implementation Method 2
The permeable support infill structure is configured to facilitate a clear path for coolant flow within the coolant layer by ensuring spacing or a gap between the air layer and the hydrogen layer, while also permitting coolant flow through the permeable support infill structure
Data Source
AI summary
A fuel cell may include a first fuel cell bipolar plate defining an air layer, a second fuel cell bipolar plate defining a hydrogen layer, and a coolant layer defined by the air layer and the hydrogen layer. A permeable support infill structure, composed of sintered thermally conductive powder particles, is arranged at the cooling layer to prevent flow blockage at the coolant layer, define a thermally conductive path between the air layer and the hydrogen layer, and facilitate coolant flow through the permeable support infill structure.