Fuel cell system control using an inferred mass air flow
US-2015288007-A1 · Oct 8, 2015 · US
Method for operating a fuel cell system
US11088377B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11088377-B2 |
| Application number | US-201816179509-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 2, 2018 |
| Priority date | May 4, 2016 |
| Publication date | Aug 10, 2021 |
| Grant date | Aug 10, 2021 |
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- Title
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Abstract
Official abstract text for this publication.
A method for operating a fuel cell system includes delivering an oxidant to at least one fuel cell by at least one oxidant delivery device where the stoichiometric ratio of the oxidant is modified on the basis of the delivery rate of the oxidant delivery device.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for operating a fuel cell system, comprising the acts of: delivering an oxidant by an oxidant delivery means to a fuel cell; altering a stoichiometric ratio of the oxidant when the oxidant delivery means has substantially reached a maximum delivery rate below an overload delivery rate range; and operating the oxidant delivery means below the overload delivery rate range in accordance with the altered stoichiometric ratio of the oxidant. 2. The method as claimed in claim 1 , wherein the stoichiometric ratio is reduced such that the fuel cell provides a fuel cell current that is to be provided and/or a fuel cell power that is to be provided without the oxidant delivery means delivering the oxidant at a delivery rate above the maximum delivery rate. 3. The method as claimed in claim 1 , wherein the oxidant delivery means delivers the oxidant at a delivery rate above the maximum delivery rate when a value of the stoichiometric ratio of the oxidant has reached or exceeded a lower limiting value for the stoichiometric ratio. 4. The method as claimed in claim 3 , wherein the oxidant delivery means delivers the oxidant at the delivery rate above the maximum delivery rate only for a timespan which is shorter than a maximum permissible timespan for the oxidant delivery means. 5. An apparatus for operating a fuel cell system, comprising: an oxidant delivery means, configured to deliver an oxidant to the fuel cell; and a control facility, configured to: alter a stoichiometric ratio of the oxidant when the oxidant delivery means has substantially reached a maximum delivery rate below an overload delivery rate range, and operate the oxidant delivery means below the overload delivery rate range in accordance with the altered stoichiometric ratio of the oxidant. 6. The apparatus as claimed in claim 5 , wherein the control facility is configured to reduce the stoichiometric ratio such that the fuel cell provides a fuel cell current that is to be provided and/or a fuel cell power that is to be provided without the oxidant delivery means delivering the oxidant at a delivery rate above the maximum delivery rate. 7. The apparatus as claimed in claim 5 , wherein the control facility is configured to control the oxidant delivery means such that the oxidant is delivered at a delivery rate above the maximum delivery rate when a value of the stoichiometric ratio of the oxidant has reached or exceeded a lower limiting value for the stoichiometric ratio. 8. The apparatus as claimed in claim 7 , wherein the control facility is configured to control the oxidant delivery means such that the oxidant is delivered at the delivery rate above the maximum delivery rate only for a timespan which is shorter than a maximum permissible timespan for the oxidant delivery means.
Assignees
Inventors
Classifications
- H01M8/04753Primary
of fuel cell reactants · CPC title
Reactant storage and supply, e.g. means for feeding, pipes · CPC title
Fuel cells · CPC title
of gaseous reactants · CPC title
of cathode reactants at the inlet or inside the fuel cell · CPC title
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Frequently asked questions
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- What does patent US11088377B2 cover?
- A method for operating a fuel cell system includes delivering an oxidant to at least one fuel cell by at least one oxidant delivery device where the stoichiometric ratio of the oxidant is modified on the basis of the delivery rate of the oxidant delivery device.
- Who is the assignee on this patent?
- Bayerische Motoren Werke Ag
- What technology area does this patent fall under?
- Primary CPC classification H01M8/04753. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 10 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).