Fuel cell system and aircraft having an inerting system
US-2024379984-A1 · Nov 14, 2024 · US
Fuel cell stack used as coolant heater
US9034530B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9034530-B2 |
| Application number | US-18705608-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 6, 2008 |
| Priority date | Aug 6, 2008 |
| Publication date | May 19, 2015 |
| Grant date | May 19, 2015 |
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- Title
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Abstract
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A system and method for increasing the temperature of a fuel cell stack quickly, especially at cold stack start-up. The method includes determining whether the fuel cell stack is below a first predetermined temperature threshold, and, if so, starting a cooling fluid flow through the stack and engaging a shorting circuit across the stack to short circuit the stack and cause the stack to operate inefficiently. The method then determines a desired heating rate of the fuel cell stack and calculates a cathode airflow to the fuel cell stack based on the desired heating rate. The method reduces the flow of cathode air to the stack if a minimum cell voltage is below a predetermined minimum cell voltage threshold and disengages the shorting circuit and applies vehicle loads to the stack when the stack temperature reaches a predetermined second temperature threshold.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for heating a fuel cell stack at stack start-up, said method comprising: determining whether the temperature of the fuel cell stack is below a first predetermined temperature threshold; starting a cooling fluid flow through the stack if the stack temperature is below the first predetermined temperature threshold; engaging a shorting circuit across the stack to short circuit the stack and cause the stack to operate inefficiently; determining a…
Assignees
Inventors
Classifications
Electricity · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
Electricity · mapped topic
- H01M8/04089Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9034530B2 cover?
- A system and method for increasing the temperature of a fuel cell stack quickly, especially at cold stack start-up. The method includes determining whether the fuel cell stack is below a first predetermined temperature threshold, and, if so, starting a cooling fluid flow through the stack and engaging a shorting circuit across the stack to short circuit the stack and cause the stack to operate …
- Who is the assignee on this patent?
- Lebzelter Derek R, Lakshmanan Balasubramanian, Wagner Frederick T, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H01M8/04089. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 19 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).