Modular Fuel Cell Stack Assembly with Integrated Oxidizer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modular multi-stack fuel cell assemblies face complexity and high costs due to intricate piping, baffles, and stringent thermal insulation requirements, along with the need for additional gas streams like nitrogen for leak purging, which complicates manufacturing and maintenance.
Innovation Solution
A modular multi-stack fuel cell assembly design featuring a containment structure with integrated oxidizer units that utilize anode exhaust to generate oxidant gas, eliminating external oxidizers and reducing the number of manifolds by forming sealed regions within the enclosure for improved gas separation and distribution, and using sealing assemblies to isolate gas flows without traditional manifolds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional piping, baffles, and thermal insulation are used in modular fuel cell assemblies, then uniform flow distribution and pressure differential are achieved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent combines the functions of piping, baffles, and thermal insulation into a single integrated manifold structure. The manifold serves as both the gas distribution system and the thermal barrier, eliminating the need for separate insulation layers and complex piping arrangements while maintaining uniform flow distribution across all fuel cell stacks.
Solution Approach 2:
The manifold is designed to perform multiple functions simultaneously: it distributes reactant gases uniformly to all stacks, collects exhaust gases, provides thermal insulation between stacks, and maintains structural integrity. This multi-functional design reduces the overall number of components and simplifies the assembly process.
2Temperature
If stringent thermal insulation is applied to isolate stacks from the enclosure, then thermal isolation is achieved, but manufacturing cost increases
Solution Approach 1:
The manifold structure is designed to serve as the primary thermal barrier between adjacent fuel cell stacks, eliminating the need for additional insulation materials and layers. By integrating thermal insulation functionality into the manifold itself, the design reduces material costs and simplifies manufacturing while maintaining effective thermal isolation.
3Reliability
If nitrogen gas purge is implemented to detect leaks, then leak detection capability is provided, but device complexity and process control requirements increase
Solution Approach 1:
The patent removes the nitrogen gas purge system entirely by implementing a sealed enclosure design that prevents fuel leakage into the enclosure space. The sealing assemblies create hermetic barriers between fuel cells and the enclosure, eliminating the need for active leak detection systems and their associated complexity.
Solution Approach 2:
The design incorporates preventive sealing measures that stop potential fuel leaks before they can occur, rather than relying on detection and response systems. The sealing assemblies are installed at critical interfaces to prevent leaks proactively, eliminating the need for nitrogen purging and complex monitoring systems.
4Ease of operation
If multiple separate manifolds are used for each stack, then gas distribution is achieved, but device complexity and maintenance cost increase
Solution Approach 1:
The patent consolidates multiple individual stack manifolds into a single shared manifold structure that serves all fuel cell stacks. This integrated manifold reduces the total number of components, simplifies gas distribution routing, and makes maintenance more accessible since all manifolds are located in one place rather than being distributed across multiple stacks.
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 simplifies the assembly, reduces manufacturing and maintenance costs, enhances reliability, and improves performance by integrating oxidant gas generation and reducing gas leakage risks, while also providing a more compact and thermally efficient solution.
Implementation Method 1
oxidizer units that utilize anode exhaust to generate oxidant gas
Implementation Method 2
sealing assemblies to isolate gas flows without traditional manifolds
Data Source
Figure 1~8
Figure 2
Figure 3
AI summary
A modular fuel cell stack assembly comprising a plurality of fuel cell stacks, each of the stacks having a plurality of stack faces and a plurality of stack corners formed between the stack faces, wherein the plurality of stack faces include a cathode inlet face adapted to receive oxidant gas for use in a cathode side of the fuel cell stack, a cathode outlet face adapted to output cathode exhaust from the cathode side, an anode inlet face adapted to receive fuel for use in an anode side of the fuel cell stack and an anode outlet face adapted to output anode exhaust from the anode side, and wherein at least one of the cathode inlet face, cathode outlet face, anode inlet face and anode outlet face is an open face without a manifold, and a containment structure for housing the plurality of fuel cell stacks and for providing fuel and oxidant gas to said fuel cell stacks, the containment structure including at least one sealed chamber for sealingly enclosing and isolating at least one open face. Also provided is a modular fuel cell assembly comprising a plurality of fuel cell stacks, an oxidizer disposed centrally of the fuel cell stacks and adapted to receive anode exhaust from the fuel cell stacks, to generate oxidant gas using the anode exhaust and to distribute the oxidant gas to the fuel cell stacks, and a containment structure for housing the plurality of fuel cell stacks and the oxidizer and adapted to receive fuel and distribute the fuel to the fuel cell stacks.