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US5069985A
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Plaque fuel cell stack
Assignee: UTC Power Corp
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Filing: 1990-02-15
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Granted: 1991-12-03
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Expires: 2010-02-15
Abstract
Abstract A stacked fuel cell has a plurality of cell plaques, each plaque having a plurality of horizontally disposed fuel cells placed in an insulating frame. By utilizing a plurality of cell plaques, overall fuel cell stack voltage can be substantially increased by interconnecting adjacent plaque cells to form substacks which are in turn connected in series. Thus stack voltage is increased without requiring additional fuel cell height.
Inventors
- 👤 Ronald Cohen
- 👤 Eugene W. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:22
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04007; H01M8/04067; H01M8/04074; H01M8/02; H01M8/0271; H01M8/0273; H01M8/24; H01M8/2465; H01M8/2484; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A fuel cell stack comprising a plurality of cell plaques, each plaque having a plurality of individual fuel cells electrically isolated from each other, the cells interconnected fluidly to provide a fuel and an oxidizer to each cell, adjacent cells disposed in a plaque-to-plaque relationship forming a substack, each substack serially connected electrically to another substack to increase the stack voltage.
Claim 2
Dependent Claim
61 words
A fuel cell stack comprising a plurality of cell plaques, each plaque having a plurality of individual fuel cells electrically isolated from each other, the cells interconnected fluidly to provide a fuel and an oxidizer to each cell, adjacent cells disposed in a plaque-to-plaque relationship forming a substack, each substack serially connected electrically to another substack to increase the stack voltage.
Claim 3
Dependent Claim
51 words
The fuel cell stack of claim 1 further comprising a plurality of insulating frames, each plaque having an insulating frame, each plaque cell disposed within recesses in the frame for substantially electrically insulating the cells from each, and having means for supplying a fuel and an oxidizer to the plaque cells.
Claim 4
Dependent Claim
40 words
The fuel cell stack of claim 2 wherein the means for supplying a fuel and an oxidizer to the plaque cells comprise ports provided in the frame for fluidically connecting the cells with reactant and oxidizer supply and return manifolds.
Claim 5
Dependent Claim
16 words
The fuel cell stack of claim 1 wherein each plaque contains from 2-10 plaque fuel cells.
Claim 6
Dependent Claim
15 words
The fuel cell stack of claim 1 wherein each plaque contains 3 plaque fuel cells.
Claim 7
Dependent Claim
19 words
The fuel cell stack of claim 1 wherein the fuel cell stack contains from 2 to 10 cell plaques.
Claim 8
Dependent Claim
61 words
The fuel cell stack of claim 1 further comprising at least one cooling plaque, each cooling plaque having a plurality of cooling means, each cooling means disposed opposite a respective plaque fuel cell, for cooling said fuel cell, support means provided for supporting the cooling means, the support means having fluid interconnection means for supplying a coolant to the cooling means.
Claim 9
Dependent Claim
40 words
A fuel cell plaque comprising a plurality of fuel cells placed in a side-by-side relationship, an insulating frame surrounding the cells, insulating the cells from each other and having means for supplying a reactant and an oxidizer to the cells.
Claim 10
Dependent Claim
40 words
A fuel cell plaque comprising a plurality of fuel cells placed in a side-by-side relationship, an insulating frame surrounding the cells, insulating the cells from each other and having means for supplying a reactant and an oxidizer to the cells.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |