US4693945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power generator containing fuel cell
Assignee: Hitachi Ltd
•
Filing: 1986-04-22
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Granted: 1987-09-15
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Expires: 2006-04-22
Abstract
Abstract A power generator containing a fuel cell (or cells) characterized by a fuel supply means designed to supply hydrogen gas and oxygen gas to the hydrogen and oxygen feed lines leading to the cell in response to a rapid rise of power load connected to the cell. This power generator suffers from no shortage of output power due to a delay of action and is excellent in responsiveness to sharp rise of load. In a preferred embodiment of this invention, the electrolyte is electrolyzed to produce hydrogen gas and oxygen gas by DC power generated by the fuel cell, and the produced gases are led to the hydrogen and oxygen feed lines leading to the fuel cell.
Inventors
- 👤 Hideo Ohyauchi
- 👤 Yoshiaki Amano
- 👤 Eiji Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/06; H01M8/0606; H01M8/0612; H01M8/04; H01M8/04082; H01M8/04089; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A fuel-cell power generator comprising hydrogen and oxygen feed lines, a fuel cell which generates DC power as the cell receives hydrogen gas and oxygen gas from said feed lines, and fuel supply means which supplies hydrogen gas to said hydrogen feed line and oxygen gas to said oxygen feed line in response to a sharp rise of power load connected to said fuel cell; said fuel supply means including means for producing hydrogen gas and oxygen gas by electrolyzing PG,13 an electrolyte by DC power generated by said fuel cell and for supplying the produced gases to said hydrogen and oxygen feed lines connected to said fuel cell; said means for producing hydrogen gas and oxygen gas comprising a tank containing pressurized electrolyte, hydrogen and oxygen electrodes disposed in said tank and connected to the DC power source of said fuel cell, cylindrical gas reservoirs for storing the gases produced from said oxygen electrode and said hydrogen electrode, respectively, and piping means for connecting said cylindrical gas reservoir to said hydrogen and oxygen feed lines via valves.
Claim 2
Dependent Claim
178 words
A fuel-cell power generator comprising hydrogen and oxygen feed lines, a fuel cell which generates DC power as the cell receives hydrogen gas and oxygen gas from said feed lines, and fuel supply means which supplies hydrogen gas to said hydrogen feed line and oxygen gas to said oxygen feed line in response to a sharp rise of power load connected to said fuel cell; said fuel supply means including means for producing hydrogen gas and oxygen gas by electrolyzing PG,13 an electrolyte by DC power generated by said fuel cell and for supplying the produced gases to said hydrogen and oxygen feed lines connected to said fuel cell; said means for producing hydrogen gas and oxygen gas comprising a tank containing pressurized electrolyte, hydrogen and oxygen electrodes disposed in said tank and connected to the DC power source of said fuel cell, cylindrical gas reservoirs for storing the gases produced from said oxygen electrode and said hydrogen electrode, respectively, and piping means for connecting said cylindrical gas reservoir to said hydrogen and oxygen feed lines via valves.
Claim 3
Dependent Claim
71 words
The fuel-cell power generator according to claim 1, wherein the valves provided on piping connecting said cylindrical gas reservoirs to said hydrogen and oxygen feed lnies leading to said fuel cell are solenoid valves, and a control unit is provided for controlling the opening and closing of said solenoid valves upon receiving a load rise signal at the time of a rapid change of power load connected to said fuel cell.
Claim 4
Dependent Claim
23 words
The fuel-cell power generator according to claim 1, wherein said tank containing the electrolyte is provided with an accumulator for pressurizing said electrolyte.
Claim 5
Dependent Claim
62 words
The fuel-cell power generator according to claim 1, wherein at the time of a sharp rise of power load, hydrogen gas and oxygen gas are supplied from said fuel supply means to said hydrogen and oxygen feed lines for a time in which the feed of said gases to said gas feed systems leading to said fuel cell reaches the required level.
Claim 6
Dependent Claim
36 words
The fuel-cell power generator according to claim 2, wherein the period in which the solenoid valves are opened by said control unit at the time of a sharp rise of power load is about 2-10 seconds.
Claim 7
Dependent Claim
46 words
The fuel-cell power generator according to claim 1, wherein said fuel supply means also comprises a hydrogen gas cylinder, an oxygen gas cylinder, piping connecting said gas cylinders to the hydrogen and oxygen feed lines leading to said fuel cell, and valves provided on said piping.
Claim 8
Dependent Claim
65 words
The fuel-cell power generator according to claim 6, wherein the valves provided on piping connecting said gas cylinders to said hydrogen and oxygen feed lines are solenoid valves, and a control unit is provided for controlling the opening and closing of said solenoid valves on receiving a load rise signal at the time of a sharp rise of power load connected to the fuel cell.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |