Modular Fuel Cell Stack Design with Ceramic Interconnectors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel cell stacks face challenges in modular design and power scaling, with complex electrical connections and material compatibility issues affecting efficiency and reliability.
Innovation Solution
A fuel cell stack design featuring multiple planar fuel cell units with electrical connections via ceramic interconnectors and current collectors made from materials like nickel, ferritic stainless steel, and platinum, allowing for series and parallel connections within the stack, and routing current collectors through gas channels for enhanced mechanical and electrical integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If complex electrical connections are used in fuel cell stacks, then power scaling capability is improved, but device complexity increases
Solution Approach 1:
The fuel cell stack is divided into modular fuel cell units, each containing multiple individual cells that are electrically interconnected. This segmentation allows independent assembly and connection of units to achieve desired power levels without requiring complex overall electrical connection schemes.
Solution Approach 2:
The ceramic interconnector serves multiple functions: it provides electrical connection between cells, acts as a structural support element, and functions as a gas sealing component. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall electrical connection system while maintaining power scaling capability.
2Reliability
If multiple materials are used for current collectors, then reliability is improved through resistance to reduction and oxidation, but manufacturing complexity increases
Solution Approach 1:
Different materials are used for current collectors based on their specific location and functional requirements within the fuel cell unit. This allows optimization of material properties for specific operational conditions while maintaining overall manufacturing feasibility through standardized assembly procedures.
Solution Approach 2:
The system employs composite material structures where ceramic interconnectors are combined with metallic current collectors. This composite approach leverages the oxidation resistance of ceramics and the electrical conductivity of metals, achieving enhanced reliability while using established manufacturing techniques for each material type.
3Reliability
If ceramic interconnectors are used for electrical connections, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The fuel cell unit is segmented into modular components with standardized interfaces. This segmentation allows for pre-assembly and quality control of individual modules before final stack assembly, reducing the precision requirements for the overall assembly process while maintaining reliable electrical connections through ceramic interconnectors.
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 design enhances modularity and power scaling capabilities, simplifies electrical interconnections, and improves reliability by using materials resistant to reduction and oxidation, ensuring efficient energy conversion and reduced operational complexity.
Implementation Method 1
a fuel cell unit, which is designed to convert at least the chemical reaction energy of at least one, in particular continuously supplied, fuel gas, in particular hydrogen, and at least one oxidizing agent, in particular oxygen, into electrical energy
Implementation Method 2
The individual cells are preferably electrically connected in series by means of a ceramic interconnector
Implementation Method 3
the fuel cell stack has a plurality of current collectors intended to electrically connect the cell layers of the fuel cell units to one another
Implementation Method 4
the fuel cell units each have a gas guidance unit designed to guide a fuel gas flow and/or an oxidation gas flow along the cell planes
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a fuel cell stack comprising at least two planar fuel cell units (12a; 12b) arranged one above the other, each fuel cell unit having at least one cell plane (14a; 14b) with a plurality of individual cells (14a; 14b) which are arranged at least substantially in one plane and are electrically interconnected. According to the invention, the cell planes (14a; 14b) of the fuel cell units (12a; 12b) are electrically interconnected.