LTCC Substrate Miniature Fuel Cell for Portable Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional PEM fuel cells are bulky due to the use of graphite bipolar plates, which hinder their integration into portable devices, and existing methods for reducing cell dimensions, such as silicon technology, are costly and result in low power density.
Innovation Solution
A low temperature co-fired ceramic substrate miniature polymer electrolyte membrane fuel cell is developed, comprising multiple LTCC layers with integrated resistive heating, thermistors, and electrical connections, allowing for compact and high-power-density designs suitable for portable applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional graphite bipolar plates are used in PEM fuel cells, then the fuel cell structure is stable and durable, but the cell dimensions become bulky and unsuitable for portable devices
Solution Approach 1:
The patent changes the material parameters by replacing conventional graphite bipolar plates with LTCC (low-temperature co-fired ceramic) substrates. This material substitution enables miniaturization while maintaining structural integrity, as LTCC can be fabricated in thin, flexible layers suitable for portable devices. The ceramic material allows for integrated heating elements and sensors at reduced dimensions.
Solution Approach 2:
The patent merges multiple functional components into a single integrated LTCC substrate structure. The bipolar plate, heating element, temperature sensor, and fluid distribution channels are combined into one monolithic ceramic component, eliminating the need for separate graphite plates and reducing overall cell volume while simplifying manufacturing.
2Volume of moving object
If silicon technology is used to reduce cell dimensions, then the fuel cell becomes more compact, but the overall cost increases and power density decreases
Solution Approach 1:
The patent changes the dimensional parameters by using thin-film LTCC layers that can be made extremely thin (micrometer scale), achieving higher power density than silicon-based approaches. The ceramic material allows for efficient heat and mass transport even at reduced thickness, maintaining performance while increasing compactness.
3Loss of time
If conventional fabrication methods are used, then the fuel cell assembly is robust, but the development time and cost increase
Solution Approach 1:
The patent combines the sealing function with the structural LTCC substrate itself. The ceramic layers are fired to form integral seals that are part of the substrate structure, eliminating the need for separate sealing steps and reducing development time while maintaining robust sealing performance through the inherent properties of the fired ceramic material.
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
The solution enables the creation of compact, high-power-density fuel cells with integrated passive components and electronics, reducing development time and cost, while maintaining efficient fuel distribution and electrical interconnects, suitable for portable devices.
Implementation Method 1
at least one fourth layer in physical and thermal contact with the third layer, the fourth layer comprising a resistive heating element
Implementation Method 2
a temperature sensor in the form of a thermistor configured thereon
Implementation Method 3
a wall of the cavity is coated with a catalyst for electrochemical reaction
Data Source
Figure 1(a)~1(f)
Figure 2
Figure 3
AI summary
A low temperature co-fired ceramic substrate miniature fuel cell and manufacturing method therefor is disclosed. The method can be used for rapid, flexible and precise fabrication of gas distribution network as well as for a conventional membrane electrode assembly, for providing high power density. The construction results in a light weight assembly offering 5 optimum cavity for robust set-up and planer series configuration as compared to other established methods of fabrication.