How Fuel Cells Get Even Gas Flow with Special Layers
This patent describes a fuel cell component that uses a special two-layer design with linear channels and transverse openings to evenly spread fuel gas for better performance.
Original patent title: “Gas distribution element for a fuel cell”
This patent describes a fuel cell component that uses a special two-layer design with linear channels and transverse openings to evenly spread fuel gas for better performance. Granted to SolidPower SA in 2019 with 5 claims and 1 forward citation, and it is expected to expire in 2037.
Coverage
What does this patent actually cover?
This patent describes a method for making sure fuel gas is spread evenly inside a fuel cell's gas distribution element. It uses a structure with a base layer, a first layer containing linear channels, and a second layer with special openings called 'first apertures.' As the combustible gas flows through the channels, it enters these apertures. The apertures are designed to extend sideways, or 'transverse,' to the main gas flow, and they connect at least two channels together. This allows the gas to mix and become uniform, or 'homogenized,' within the apertures. Some of this homogenized gas then flows back into the channels or exchanges between them, ensuring an even distribution before it reaches the fuel cell's active part, the cathode-anode-electrolyte unit. For example, if one channel has slightly more gas pressure, the transverse apertures allow that gas to spread to neighboring channels, balancing the flow.
The gap
What does this patent NOT cover?
- Does not cover gas distribution elements that do not include both a distinct first layer with channels and a second layer with apertures.
- Does not cover gas distribution channels that are not linear or are not arranged side-by-side.
- Does not cover apertures that do not extend in a transverse direction relative to the main gas flow within the channels.
- Does not cover designs where the apertures do not fluidly connect at least two adjacent channels.
- Does not cover systems where the homogenized gas does not flow back into or exchange between the channels.
- Does not cover elements where the total surface area of the apertures contacting the fuel cell unit is less than 20% of the total contacting surface.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
Key facts
What made this novel
The clever part is how the 'first apertures' are positioned. By extending transversely and connecting multiple linear channels, they act like tiny mixing chambers. This design allows gas to flow back and forth between channels, actively evening out pressure and concentration differences, which is more effective than just relying on passive diffusion.
The Patent Drawing
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Components within solid oxide fuel cells (SOFCs)
Gas distribution plates in proton exchange membrane (PEM) fuel cells
Electrolyzer gas diffusion layers
Stationary power generation fuel cell stacks
Automotive fuel cell systems
Why it matters
The bigger picture
Even distribution of fuel gas is critical for fuel cells to work efficiently and reliably. If gas flow is uneven, parts of the fuel cell can overheat or underperform, reducing its lifespan and power output. This invention aims to solve that problem, potentially making fuel cells more practical for various applications by improving their performance and durability.
Filed
April 10, 2017
Granted
November 5, 2019
Market context
Who's building on this
Companies in this space
SolidPower SA, the original assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →, is active in developing solid oxide fuel cell technology, which would directly benefit from such gas distribution elements. Major fuel cell manufacturers like Ballard Power Systems, Plug Power, and Ceres Power are continuously researching and improving gas flow designs to enhance the efficiency and longevity of their fuel cell stacks for various applications, including heavy-duty transport and stationary power.
Market impact
This patent contributes to the ongoing effort to improve the efficiency and reliability of fuel cells, which are key to their broader adoption. By ensuring more uniform gas distribution, it can lead to higher power output, longer operational life, and potentially lower manufacturing costs for fuel cell stacks. This could help make fuel cells more competitive against traditional power sources and accelerate their use in sectors like automotive, backup power, and industrial applications.
Claim 1 — Plain English
What this patent covers
This patent describes a method for making sure fuel gas is spread evenly inside a fuel cell's gas distribution element. It uses a structure with a base layer, a first layer containing linear channels, and a second layer with special openings called 'first apertures.' As the combustible gas flows through the channels, it enters these apertures. The apertures are designed to extend sideways, or 'transverse,' to the main gas flow, and they connect at least two channels together. This allows the gas to mix and become uniform, or 'homogenized,' within the apertures. Some of this homogenized gas then flows back into the channels or exchanges between them, ensuring an even distribution before it reaches the fuel cell's active part, the cathode-anode-electrolyte unit. For example, if one channel has slightly more gas pressure, the transverse apertures allow that gas to spread to neighboring channels, balancing the flow.
The clever bit
The clever part is how the 'first apertures' are positioned. By extending transversely and connecting multiple linear channels, they act like tiny mixing chambers. This design allows gas to flow back and forth between channels, actively evening out pressure and concentration differences, which is more effective than just relying on passive diffusion.
What it does not cover
- Does not cover gas distribution elements that do not include both a distinct first layer with channels and a second layer with apertures.
- Does not cover gas distribution channels that are not linear or are not arranged side-by-side.
- Does not cover apertures that do not extend in a transverse direction relative to the main gas flow within the channels.
- Does not cover designs where the apertures do not fluidly connect at least two adjacent channels.
- Does not cover systems where the homogenized gas does not flow back into or exchange between the channels.
- Does not cover elements where the total surface area of the apertures contacting the fuel cell unit is less than 20% of the total contacting surface.
Patent timeline
Application submitted to the patent office
Application published, typically 18 months after filing
Patent officially issued
Patent enters public domain
PatentBrief Score
Impact Score
Limited data
Citation count
6/40
Early citations
Claim breadth
3/20
Moderate scope
Recency
10/20
Granted 5–10 years ago
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$72K – $230K
Midpoint $144K · 10.7 yr remaining · industry ×2.4
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
Claim text not yet imported for this patent
The original legal language
Original claims
5 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
Wuillemin, Z. (2019). How Fuel Cells Get Even Gas Flow with Special Layers (U.S. Patent No. 10,468,695). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/10468695/gas-distribution-element-for-a-fuel-cell
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How Fuel Cells Get Even Gas Flow with Special Layers cover?
This patent describes a fuel cell component that uses a special two-layer design with linear channels and transverse openings to evenly spread fuel gas for better performance.
Who owns patent US 10468695?
SolidPower SA owns this patent, granted in 2019.
When does this patent expire?
This patent is expected to expire on April 10, 2037, when the invention enters the public domain.
What is patent US 10468695 cited by?
This patent has been cited by 1 later patents that build on its ideas.
What problem does this patent solve?
Even distribution of fuel gas is critical for fuel cells to work efficiently and reliably. If gas flow is uneven, parts of the fuel cell can overheat or underperform, reducing its lifespan and power output. This invention aims to solve that problem, potentially making fuel cells more practical for various applications by improving their performance and durability.
What does this patent NOT cover?
Does not cover gas distribution elements that do not include both a distinct first layer with channels and a second layer with apertures.
Patent monitoring