Fuel Cell Interconnector Formation via Localized Electrolyte Carbonization
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Solution Overview
Problem
The existing method of forming an interconnector part in a planar array fuel cell is complex and time-consuming, requiring multiple steps to electrically connect adjacent unit cells.
Innovation Solution
A fuel cell manufacturing method that uses a proton conductive resin electrolyte membrane with electrode layers divided by grooves, where the interconnector part is formed by a local heating process, comprising a first heating step to less than a first temperature and a second heating step to higher than the first temperature, resulting in a conductive carbide interconnector part without increasing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interconnector part is formed by filling void portions with catalyst layer material, then electrical connection between unit cells is achieved, but the formation process requires multiple steps that take time and effort
Solution Approach 1:
The patent changes the formation method by applying local heat treatment to specific regions of the electrolyte membrane, transforming the material properties in those regions to create conductive interconnector parts. This single-step thermal processing replaces the multi-step filling process, significantly reducing formation time while ensuring reliable electrical connection between adjacent unit cells
Solution Approach 2:
The patent replaces the mechanical filling process (injecting catalyst layer material into void portions) with a thermal processing approach. By applying localized heat to the electrolyte membrane, the material undergoes transformation to become conductive, eliminating the need for mechanical filling operations and reducing overall process complexity and time
2Reliability
If the interconnector part is formed by filling void portions with catalyst layer material, then electrical connection between unit cells is achieved, but the process becomes complicated with multiple steps
Solution Approach 1:
The patent simplifies the process by using local heat treatment to change the physical and chemical parameters of the electrolyte membrane material in specific regions. This thermal transformation creates the conductive interconnector parts in a single operation, replacing the complex multi-step filling process and reducing overall process complexity
Solution Approach 2:
The patent replaces the complex mechanical filling system with a simpler thermal processing system. By using heat treatment to transform the electrolyte membrane material in situ, the process eliminates the need for void formation, material preparation, and filling operations, significantly reducing process complexity
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 method allows for the easy and reliable formation of an interconnector part, simplifying the process and enhancing the electrical connection between unit cells in a planar array fuel cell.
Implementation Method 1
the interconnector part is made of a conductive carbide derived from the proton conductive resin of the electrolyte membrane, wherein the interconnector part is formed through a local heating process of carbonizing the proton conductive resin by locally heating the electrolyte membrane
Implementation Method 2
the interconnector part is formed through a local heating process of carbonizing the proton conductive resin by locally heating the electrolyte membrane
Data Source
AI summary
A fuel cell manufacturing method capable of easily forming an interconnector part electrically connecting adjacent unit cells in a planar array fuel cell is provided. The interconnector part (30) is formed through a local heating process of carbonizing a proton conductive resin by locally heating an electrolyte membrane (12). The local heating process includes: a first heating step of heating a part of the electrolyte membrane (12) to a temperature equal to or less than a first temperature at a first temperature increase rate or less; and a second heating step of heating the part of the electrolyte membrane (12) to a temperature equal to or greater than a second temperature higher than the first temperature at a temperature increase rate greater than the first temperature increase rate, after the first heating step.