US5082753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device for fuel cell
Assignee: Fuji Electric Co Ltd
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Filing: 1990-07-12
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Granted: 1992-01-21
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Expires: 2010-07-12
Abstract
Abstract Cooling pipes are embedded in cooling plates for cooling the cell stack of a fuel cell battery. Cooling water is supplied from an inlet main cooling pipe to the cooling pipes, and, after having cooling the cell stack, is discharged from an outlet main cooling pipe. Each of the inlet and outlet main cooling pipes comprises a concentric stock of short metallic pipes and ring-shaped insulating spacers, the metallic pipes and the insulating spacers being alternately arranged. The metallic pipes and insulating spacers of the concentric stock are fastened together by either studs disposed around the stack or springs housed in outer holder tube which is fitted over the concentric stock.
Inventors
- 👤 Hiroshi Shimizu
- 👤 Yoshiaki Ozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:41
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04007; H01M8/04029; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A device for cooling a fuel cell including a cell stack and cooling plates disposed therein and having cooling pipes disposed in the cooling plates, with a cooling medium flowing through the cooling pipes, said device comprising: main cooling pipes connected respectively to inlet and outlet ends of the cooling pipes through header pipes; each of said main cooling pipes having a concentric stack of short metallic pipes and ring-shaped insulating spacers, said metallic pipes and said insulating spacers being alternately arranged; studs fastening the stack of metallic pipes and insulating spacers of each said main cooling pipe together, thereby making said main cooling pipes liquid-tight; and branch pipes connected to said metallic pipes and leading to the cooling plates.
Claim 2
Independent Claim
120 words
A device for cooling a fuel cell including a cell stack and cooling plates disposed therein and having cooling pipes disposed in the cooling plates, with a cooling medium flowing through the cooling pipes, said device comprising: main cooling pipes connected respectively to inlet and outlet ends of the cooling pipes through header pipes; each of said main cooling pipes having a concentric stack of short metallic pipes and ring-shaped insulating spacers, said metallic pipes and said insulating spacers being alternately arranged; studs fastening the stack of metallic pipes and insulating spacers of each said main cooling pipe together, thereby making said main cooling pipes liquid-tight; and branch pipes connected to said metallic pipes and leading to the cooling plates.
Claim 3
Independent Claim
136 words
A device for cooling a fuel cell including a cell stack and cooling plates disposed therein and having cooling pipes disposed in the cooling plates, with a cooling medium flowing through the cooling pipes, said device comprising: main cooling pipes connected respectively to inlet and outlet ends of the cooling pipes through header pipes; each of said main cooling pipes having a concentric stack of short metallic pipes and ring-shaped insulating spacers, said metallic pipes and said insulating spacers being alternately arranged; an outer holder tube fitted over the stack of each said main cooling pipe; a spring house in said outer holder tube, for fastening the stack of each said main cooling pipe together, thereby making said main cooling pipes liquid-tight; and branch pipes connected to said metallic pipes and leading to the cooling plates.
Claim 4
Independent Claim
136 words
A device for cooling a fuel cell including a cell stack and cooling plates disposed therein and having cooling pipes disposed in the cooling plates, with a cooling medium flowing through the cooling pipes, said device comprising: main cooling pipes connected respectively to inlet and outlet ends of the cooling pipes through header pipes; each of said main cooling pipes having a concentric stack of short metallic pipes and ring-shaped insulating spacers, said metallic pipes and said insulating spacers being alternately arranged; an outer holder tube fitted over the stack of each said main cooling pipe; a spring house in said outer holder tube, for fastening the stack of each said main cooling pipe together, thereby making said main cooling pipes liquid-tight; and branch pipes connected to said metallic pipes and leading to the cooling plates.
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) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |