US20110003219A1 - Solid oxide fuel cell including bypass circuit - Google Patents
Solid oxide fuel cell including bypass circuit Download PDFInfo
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- US20110003219A1 US20110003219A1 US12/857,135 US85713510A US2011003219A1 US 20110003219 A1 US20110003219 A1 US 20110003219A1 US 85713510 A US85713510 A US 85713510A US 2011003219 A1 US2011003219 A1 US 2011003219A1
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- fuel cell
- solid oxide
- oxide fuel
- cells
- bypass circuit
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- 239000000446 fuel Substances 0.000 title claims abstract description 86
- 239000007787 solid Substances 0.000 title claims abstract description 34
- 230000004048 modification Effects 0.000 claims abstract description 8
- 238000012986 modification Methods 0.000 claims abstract description 8
- 230000005669 field effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000002950 deficient Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04664—Failure or abnormal function
- H01M8/04671—Failure or abnormal function of the individual fuel cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04246—Short circuiting means for defective fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04552—Voltage of the individual fuel cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04858—Electric variables
- H01M8/04925—Power, energy, capacity or load
- H01M8/0494—Power, energy, capacity or load of fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
- H01M8/2425—High-temperature cells with solid electrolytes
- H01M8/243—Grouping of unit cells of tubular or cylindrical configuration
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04955—Shut-off or shut-down of fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the invention relates to fuel cells and more particularly to fuel cells having a bypass circuit for modifying an interconnection between fuel cells.
- Fuel cells may include fuel cell stacks having many cells connected electrically in series or parallel. If one of the cells fail, it would be desirable to electrically remove the cell from the stack so that the current being produced by the fuel cell can bypass them. Removing the defective cells from the stack allows the stack to become more fault tolerant by avoiding the defective cells. There is therefore a need in the art for an improved fuel cell having the ability to remove defective cells from an array or stack of fuel cells improving the fault tolerance of the stack.
- a bypass circuit for interconnecting fuel cells may be utilized to modify the current or voltage output of the fuel cell, as well as the efficiency and desired output of the fuel cell.
- a solid oxide fuel cell including an insulating housing.
- a plurality of interconnected cells defining a stack are disposed within the housing.
- Each of the fuel cells includes an anode and a cathode.
- a bypass circuit is positioned outside of the housing and is coupled between the anode and the cathode of at least a portion of the plurality of cells allowing modification of an interconnection between the cells.
- FIG. 1 is a partial perspective view of a solid oxide fuel cell including the insulating housing, a plurality of interconnected cells, and a bypass circuit positioned outside of the housing and coupled between an anode and cathode of the fuel cells;
- FIG. 2 is a view of two fuel cells interconnected at the anodes and cathodes and having a bypass circuit without the insulation being shown for clarity;
- FIG. 3 is a schematic circuit diagram of a plurality of fuel cells with their anodes and cathodes and having an active diode controller;
- FIG. 4 is a schematic diagram of a bypass circuit having an actively controlled element allowing the plurality of fuel cells to be switched from series to parallel connections;
- FIG. 5 is a schematic circuit diagram detailing a plurality of fuel cells depicting the decoupling of either the anode or cathode or both the anode and cathode of a fuel cell from an adjacent fuel cell;
- FIG. 6 is a schematic circuit diagram depicting a plurality of fuel cells including an actively controlled element allowing management of the direct current output of the fuel cell stack;
- FIG. 7 is a schematic circuit diagram of an active diode element having a precision reference, a precision comparator, and a logic circuit.
- FIG. 1 there is shown part of a solid oxide fuel cell 5 including an insulating housing 10 .
- a plurality of interconnected cells 15 defining a stack 20 is disposed within the housing 10 .
- Each of the fuel cells 15 includes an anode 25 and a cathode 30 separated from each other.
- a bypass circuit 35 is positioned outside of the housing 10 and is coupled between the anode 25 and cathode 30 of at least a portion of the plurality of cells 15 allowing modification of an interconnection between the cells 15 .
- the bypass circuit 35 may be coupled between each of the plurality of cells 15 allowing modification of an interconnection between all of the plurality of cells 15 . As can be seen in FIGS.
- the bypass circuit 35 may be positioned between the anode 25 and cathode 30 of each of the plurality of cells 15 to sense the voltage between the anode 25 and cathode 30 and bypass that cell is if the voltage falls below a predetermined value.
- the bypass circuit 35 includes an actively controlled element 40 .
- the actively controlled element 40 may be selected from various members including switches, gates, or other decoupling devices.
- switches including various transistors include NPN transistors, PNP transistors, JFET transistors, solid state switching elements, switches, field effect transistors, MOSFETs, and diodes.
- a central control unit 45 may be coupled to the actively controlled element 40 to allow for adjusting the actively controlled element 40 between various conditions.
- the bypass circuit 35 may act as a passively actuated diode or may act as an actively actuated diode. Passive actuated diodes may be utilized in various conditions such as high electromagnetic environments or other situations where cost factors and other factors such as the stack heat emissions, volumetric space, temperature tolerance, shock tolerance and vibration tolerance of the various components may be modified to achieve specific results.
- bypass circuit 35 may act as an active diode.
- Various actively controlled elements 40 may be used in the bypass circuit 35 to achieve the active diode action.
- the bypass circuit 35 includes an OR circuit.
- the bypass circuit 35 may include an OR and an AND circuit to actively manage the decoupling of various portions of the fuel cells 15 in the stack 20 , as will be discussed in more detail below.
- FIG. 5 there is shown a schematic diagram of a plurality of fuel cells 15 having an anode 25 and cathode 30 .
- An actively controlled element 40 is connected both at the cathode 30 and anode 25 to a buss 47 . Additionally, an actively controlled element 40 is connected between the cathode 30 and anode 25 of the buss 47 .
- a or B may be decoupled from the buss 47 or A and B may be decoupled from the buss 47 .
- the actively controlled element 40 on the buss 47 may facilitate decoupling of the individual fuel cell 15 from the buss 47 .
- the bypass circuit 35 may include actively controlled elements 40 allowing transition from series to parallel connections between each of the plurality of fuel cells 15 .
- the bypass circuit 35 is positioned outside of an insulating barrier or housing 10 while the plurality of fuel cells 15 are positioned within the housing 10 .
- Each of the fuel cells 15 includes a cathode 30 and anode 25 .
- the cathodes 30 of adjacent fuel cells are connected via an actively controlled element 40 which may be actuated to connect with either the cathode 30 or anode 25 of the fuel cell 15 . ill this manner, the connection between adjacent cells 15 may be switched from series to parallel.
- anodes 25 of adjacent cells 15 are electrically coupled via an actively controlled element 40 to allow the anodes 25 of adjacent cells 15 to be connected or disconnected. Again this arrangement allows for the anodes 25 and cathodes 30 of adjacent cells 15 to be linked with either of each other to provide series or parallel connections between adjacent fuel cells 15 .
- the interconnection between the cells 15 can be modified to decouple faulty cells 15 from the stack 20 . Additionally, the interconnection between the cells 15 may be modified to adjust a voltage output of the stack 20 . Similarly, an interconnection between the cells 15 may be modified adjusting a current output of the stack 20 . Additionally, interconnection between the cells 15 may be modified managing a power output of the stack 20 . Various other parameters may also be adjusted through the modification of the interconnection between the cells 15 including adjusting an efficiency of the plurality of fuel cells 15 as well as actively controlling the direct current of the stack 20 .
- an efficiency of the plurality of fuel cells 15 of the stack may be modified to produce more heat rather than produce more electricity to adjust a temperature of the fuel cell such that it can be controlled to produce a desired operating condition.
- the interconnection between the cells 15 may be modified managing a power output of the stack to prevent back loading of live cells 15 and improve an overall efficiency of the solid oxide fuel cell 5 .
- FIG. 6 there is shown a circuit diagram detailing two fuel cells 15 wherein the interconnection between the cells 15 may be modified to actively control the direct current of the stack 20 .
- two fuel cells 15 are provided each having an anode 25 and cathode 30 positioned on an inside of the insulating housing 10 .
- the bypass circuit 35 is positioned outside the housing 10 such that the heat produced from the solid oxide fuel cell does not affect the circuitry.
- the bypass circuit 35 includes an actively controlled element 40 shown as a switch as well as a converter 50 and diode 55 .
- Such a structure allows for the active controlling of the direct current produced by the stack 20 such that the DC output of the solid oxide fuel cells can be actively controlled.
- the bypass circuit 35 can be utilized to adjust the interconnection of fuel cells 15 in both a parallel or series type connection.
- the fuel cells 15 may be positioned either coupled or hard wired in series or parallel.
- at least a portion of the fuel cells 15 may be connected in series or in parallel or may alternatively be connected parallel to another portion of fuel cells 15 that are connected in series.
- the fuel cells 15 may be arranged in specific desired orientations to produce a desired output.
- the bypass circuit 35 again would allow for the decoupling of various portions of the plurality of fuel cells 15 that are interconnected to form a stack 20 .
- an actively controlled element 40 that includes switch.
- the switch includes a precision comparator 60 , precision reference 65 , and a logic driver 70 .
- This bypass circuit 35 acts as an actively controlled diode allowing the bypass circuit 35 to be utilized to bypass various of the fuel cells 15 or to perform other functions such as described above including the adjustment of the efficiency of the cells 15 , the management of the power output, current output, or voltage output of a stack 20 of interconnected fuel cells 15 .
- the solid oxide fuel cell 5 may be a portable solid oxide fuel cell. Additionally, the solid oxide fuel cell 5 may be handheld allowing for transportation by a person in an efficient manner,
- the invention has been described in an illustrative manner. It is to be understood that the terminology which has been used is intended to be in the nature of words of description rather than limitation. Many modifications and variations of the invention are possible in light of the above teachings. Therefore, within the scope of the appended claims, the invention may be practiced other than as specifically described.
Abstract
In one aspect there is disclosed a solid oxide fuel cell including an insulating housing. A plurality of interconnected cells defining a stack are disposed within the housing. Each of the fuel cells includes an anode and a cathode. A bypass circuit is positioned outside of the housing and is coupled between the anode and the cathode of at least a portion of the plurality of cells allowing modification of an interconnection between the cells.
Description
- The present applications is a Continuation Application of U.S. patent application Ser. No. 11/683,666 which is hereby incorporated by reference herein in its entirety.
- The invention relates to fuel cells and more particularly to fuel cells having a bypass circuit for modifying an interconnection between fuel cells.
- Fuel cells may include fuel cell stacks having many cells connected electrically in series or parallel. If one of the cells fail, it would be desirable to electrically remove the cell from the stack so that the current being produced by the fuel cell can bypass them. Removing the defective cells from the stack allows the stack to become more fault tolerant by avoiding the defective cells. There is therefore a need in the art for an improved fuel cell having the ability to remove defective cells from an array or stack of fuel cells improving the fault tolerance of the stack.
- Additionally, a bypass circuit for interconnecting fuel cells may be utilized to modify the current or voltage output of the fuel cell, as well as the efficiency and desired output of the fuel cell. There is therefore, a need in the art for management of a fuel cell stack to adjust the overall power output of a fuel cell and to provide active control of individual fuel cells within the stack thereby modifying the interconnection between the plurality of fuel cells to actively control various parameters of the fuel cell.
- In one aspect there is disclosed a solid oxide fuel cell including an insulating housing. A plurality of interconnected cells defining a stack are disposed within the housing. Each of the fuel cells includes an anode and a cathode. A bypass circuit is positioned outside of the housing and is coupled between the anode and the cathode of at least a portion of the plurality of cells allowing modification of an interconnection between the cells.
-
FIG. 1 is a partial perspective view of a solid oxide fuel cell including the insulating housing, a plurality of interconnected cells, and a bypass circuit positioned outside of the housing and coupled between an anode and cathode of the fuel cells; -
FIG. 2 is a view of two fuel cells interconnected at the anodes and cathodes and having a bypass circuit without the insulation being shown for clarity; -
FIG. 3 is a schematic circuit diagram of a plurality of fuel cells with their anodes and cathodes and having an active diode controller; -
FIG. 4 is a schematic diagram of a bypass circuit having an actively controlled element allowing the plurality of fuel cells to be switched from series to parallel connections; -
FIG. 5 is a schematic circuit diagram detailing a plurality of fuel cells depicting the decoupling of either the anode or cathode or both the anode and cathode of a fuel cell from an adjacent fuel cell; -
FIG. 6 is a schematic circuit diagram depicting a plurality of fuel cells including an actively controlled element allowing management of the direct current output of the fuel cell stack; -
FIG. 7 is a schematic circuit diagram of an active diode element having a precision reference, a precision comparator, and a logic circuit. - Referring to
FIG. 1 , there is shown part of a solidoxide fuel cell 5 including aninsulating housing 10. A plurality of interconnectedcells 15 defining astack 20 is disposed within thehousing 10. Each of thefuel cells 15 includes ananode 25 and acathode 30 separated from each other. Abypass circuit 35 is positioned outside of thehousing 10 and is coupled between theanode 25 andcathode 30 of at least a portion of the plurality ofcells 15 allowing modification of an interconnection between thecells 15. In one aspect, thebypass circuit 35 may be coupled between each of the plurality ofcells 15 allowing modification of an interconnection between all of the plurality ofcells 15. As can be seen inFIGS. 2 and 3 , thebypass circuit 35 may be positioned between theanode 25 andcathode 30 of each of the plurality ofcells 15 to sense the voltage between theanode 25 andcathode 30 and bypass that cell is if the voltage falls below a predetermined value. - In one aspect and as detailed in
FIGS. 4-7 , thebypass circuit 35 includes an actively controlledelement 40. The actively controlledelement 40 may be selected from various members including switches, gates, or other decoupling devices. Various types of switches including various transistors include NPN transistors, PNP transistors, JFET transistors, solid state switching elements, switches, field effect transistors, MOSFETs, and diodes. In another aspect, acentral control unit 45 may be coupled to the actively controlledelement 40 to allow for adjusting the actively controlledelement 40 between various conditions. - The
bypass circuit 35 may act as a passively actuated diode or may act as an actively actuated diode. Passive actuated diodes may be utilized in various conditions such as high electromagnetic environments or other situations where cost factors and other factors such as the stack heat emissions, volumetric space, temperature tolerance, shock tolerance and vibration tolerance of the various components may be modified to achieve specific results. - In another aspect, the
bypass circuit 35 may act as an active diode. Various actively controlledelements 40, as listed above, may be used in thebypass circuit 35 to achieve the active diode action. In one aspect, thebypass circuit 35 includes an OR circuit. In another aspect, thebypass circuit 35 may include an OR and an AND circuit to actively manage the decoupling of various portions of thefuel cells 15 in thestack 20, as will be discussed in more detail below. - Referring to
FIG. 5 below, there is shown a schematic diagram of a plurality offuel cells 15 having ananode 25 andcathode 30. An actively controlledelement 40 is connected both at thecathode 30 andanode 25 to abuss 47. Additionally, an actively controlledelement 40 is connected between thecathode 30 andanode 25 of thebuss 47. As can be seen from the figure, either A or B may be decoupled from thebuss 47 or A and B may be decoupled from thebuss 47. Additionally, the actively controlledelement 40 on thebuss 47 may facilitate decoupling of theindividual fuel cell 15 from thebuss 47. - In another aspect of the invention, the
bypass circuit 35 may include actively controlledelements 40 allowing transition from series to parallel connections between each of the plurality offuel cells 15. As can be seen inFIG. 4 , thebypass circuit 35 is positioned outside of an insulating barrier orhousing 10 while the plurality offuel cells 15 are positioned within thehousing 10. Each of thefuel cells 15 includes acathode 30 andanode 25. Thecathodes 30 of adjacent fuel cells are connected via an actively controlledelement 40 which may be actuated to connect with either thecathode 30 oranode 25 of thefuel cell 15. ill this manner, the connection betweenadjacent cells 15 may be switched from series to parallel. Additionally, theanodes 25 ofadjacent cells 15 are electrically coupled via an actively controlledelement 40 to allow theanodes 25 ofadjacent cells 15 to be connected or disconnected. Again this arrangement allows for theanodes 25 andcathodes 30 ofadjacent cells 15 to be linked with either of each other to provide series or parallel connections betweenadjacent fuel cells 15. - As stated above, the interconnection between the
cells 15 can be modified to decouplefaulty cells 15 from thestack 20. Additionally, the interconnection between thecells 15 may be modified to adjust a voltage output of thestack 20. Similarly, an interconnection between thecells 15 may be modified adjusting a current output of thestack 20. Additionally, interconnection between thecells 15 may be modified managing a power output of thestack 20. Various other parameters may also be adjusted through the modification of the interconnection between thecells 15 including adjusting an efficiency of the plurality offuel cells 15 as well as actively controlling the direct current of thestack 20. For example an efficiency of the plurality offuel cells 15 of the stack may be modified to produce more heat rather than produce more electricity to adjust a temperature of the fuel cell such that it can be controlled to produce a desired operating condition. Additionally, the interconnection between thecells 15 may be modified managing a power output of the stack to prevent back loading oflive cells 15 and improve an overall efficiency of the solidoxide fuel cell 5. - Referring to
FIG. 6 , there is shown a circuit diagram detailing twofuel cells 15 wherein the interconnection between thecells 15 may be modified to actively control the direct current of thestack 20. As can be seen from the figure, twofuel cells 15 are provided each having ananode 25 andcathode 30 positioned on an inside of theinsulating housing 10. Thebypass circuit 35 is positioned outside thehousing 10 such that the heat produced from the solid oxide fuel cell does not affect the circuitry. As can be seen in the figure, thebypass circuit 35 includes an actively controlledelement 40 shown as a switch as well as aconverter 50 anddiode 55. Such a structure allows for the active controlling of the direct current produced by thestack 20 such that the DC output of the solid oxide fuel cells can be actively controlled. - As stated above, the
bypass circuit 35 can be utilized to adjust the interconnection offuel cells 15 in both a parallel or series type connection. Additionally, thefuel cells 15 may be positioned either coupled or hard wired in series or parallel. In one aspect, at least a portion of thefuel cells 15 may be connected in series or in parallel or may alternatively be connected parallel to another portion offuel cells 15 that are connected in series. In this manner, thefuel cells 15 may be arranged in specific desired orientations to produce a desired output. Thebypass circuit 35 again would allow for the decoupling of various portions of the plurality offuel cells 15 that are interconnected to form astack 20. - In one aspect of the invention, and referring to
FIG. 7 , there is shown an actively controlledelement 40 that includes switch. As can be seen in the figure, the switch includes aprecision comparator 60,precision reference 65, and alogic driver 70. Thisbypass circuit 35 acts as an actively controlled diode allowing thebypass circuit 35 to be utilized to bypass various of thefuel cells 15 or to perform other functions such as described above including the adjustment of the efficiency of thecells 15, the management of the power output, current output, or voltage output of astack 20 ofinterconnected fuel cells 15. - While the above description has included a general description of a solid
oxide fuel cell 5 having a plurality ofinterconnected cells 15, in one aspect the solidoxide fuel cell 5 may be a portable solid oxide fuel cell. Additionally, the solidoxide fuel cell 5 may be handheld allowing for transportation by a person in an efficient manner, The invention has been described in an illustrative manner. It is to be understood that the terminology which has been used is intended to be in the nature of words of description rather than limitation. Many modifications and variations of the invention are possible in light of the above teachings. Therefore, within the scope of the appended claims, the invention may be practiced other than as specifically described.
Claims (20)
1. A solid oxide fuel cell including:
an insulating housing;
a plurality of interconnected cells defining a stack disposed within the insulating housing; and
a bypass circuit coupled between the anode and the cathode of at least a portion of the interconnected cells allowing modification of an interconnection therebetween.
2. The solid oxide fuel cell of claim 1 , wherein the bypass circuit is coupled between each cell of the plurality of interconnected cells defining the stack.
3. The solid oxide fuel cell of claim 1 , wherein the plurality of fuel cells are connected to a buss.
4. The solid oxide fuel cell of claim 3 , wherein the bypass circuit facilitates decoupling of one more of the interconnected cells from the buss.
5. The solid oxide fuel cell of claim 1 wherein the bypass circuit includes an actively controlled element.
6. The solid oxide fuel cell of claim 5 wherein the actively controlled element is selected from: NPN transistors, PNP transistors, JFET transistors, solid state switching elements, switches, field effect transistors, MOSFETs, diodes, and an external P-channel MOSFET.
7. The solid oxide fuel cell of claim 5 wherein the actively controlled element comprises a precision comparator, precision reference and a logic driver.
8. The solid oxide fuel cell of claim 5 , wherein the bypass circuit includes a diode.
9. The solid oxide fuel cell of claim 5 , wherein the bypass circuit can facilitate a modification of the plurality of interconnected cells from a series to a parallel connection.
10. The solid oxide fuel cell of claim 5 wherein the bypass circuit includes and a central control unit coupled to the actively controlled element.
11. The solid oxide fuel cell of claim 5 wherein the bypass circuit acts as a passively actuated diode.
12. The solid oxide fuel cell of claim 5 wherein the bypass circuit acts as an active diode.
13. The solid oxide fuel cell of claim 5 wherein the interconnection between the tubular cells is modified by decoupling faulty cells from the stack.
14. The solid oxide fuel cell of claim 5 wherein the interconnection between the tubular cells is modified by adjusting a voltage output of the stack.
15. The solid oxide fuel cell of claim 5 wherein the interconnection between the tubular cells is modified by adjusting a current output of the stack.
16. The solid oxide fuel cell of claim 5 wherein the interconnection between the tubular cells is modified by managing a power output of the stack.
17. The solid oxide fuel cell of claim 5 wherein the interconnection between the tubular cells is modified by adjusting an efficiency of the plurality of fuel cells of the stack.
18. The solid oxide fuel cell of claim 5 wherein at least a portion of the fuel cells are connected in series.
19. The solid oxide fuel cell of claim 5 wherein at least a portion of the interconnected cells are connected in parallel.
20. The solid oxide fuel cell of claim 5 wherein at least a portion of the interconnected cells is connected in series and wherein another portion of fuel cells is connected in parallel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/857,135 US20110003219A1 (en) | 2007-03-08 | 2010-08-16 | Solid oxide fuel cell including bypass circuit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/683,666 US7799481B2 (en) | 2007-03-08 | 2007-03-08 | Fuel cell including bypass circuit for interconnecting fuel cells |
US12/857,135 US20110003219A1 (en) | 2007-03-08 | 2010-08-16 | Solid oxide fuel cell including bypass circuit |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/683,666 Continuation US7799481B2 (en) | 2007-03-08 | 2007-03-08 | Fuel cell including bypass circuit for interconnecting fuel cells |
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US20110003219A1 true US20110003219A1 (en) | 2011-01-06 |
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US11/683,666 Active 2029-07-21 US7799481B2 (en) | 2007-03-08 | 2007-03-08 | Fuel cell including bypass circuit for interconnecting fuel cells |
US12/857,135 Abandoned US20110003219A1 (en) | 2007-03-08 | 2010-08-16 | Solid oxide fuel cell including bypass circuit |
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US11/683,666 Active 2029-07-21 US7799481B2 (en) | 2007-03-08 | 2007-03-08 | Fuel cell including bypass circuit for interconnecting fuel cells |
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US (2) | US7799481B2 (en) |
EP (1) | EP2118951A4 (en) |
JP (1) | JP2010520606A (en) |
WO (1) | WO2008112219A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170220186A1 (en) * | 2013-11-13 | 2017-08-03 | Dell Products, Lp | Dynamic hover sensitivity and gesture adaptation in a dual display system |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5280253B2 (en) * | 2009-03-09 | 2013-09-04 | 本田技研工業株式会社 | Fuel cell |
US20100259104A1 (en) * | 2009-04-14 | 2010-10-14 | Robert Winkelman | Battery management system |
FI123225B (en) | 2009-07-08 | 2012-12-31 | Waertsilae Finland Oy | Method and arrangement for advanced fuel cell stack controllability |
WO2012170844A2 (en) * | 2011-06-09 | 2012-12-13 | Bloom Energy Corporation | Fuel cell bypass diode structures and attachment methods |
DE102014203159A1 (en) | 2014-02-21 | 2015-08-27 | Airbus Operations Gmbh | Fuel cell system in a bipolar high-voltage network and method for operating a bipolar high-voltage network |
DE102020101527A1 (en) * | 2020-01-23 | 2021-07-29 | Audi Aktiengesellschaft | Supply device, fuel cell vehicle and method for voltage limitation in a supply device |
JP7388391B2 (en) * | 2021-04-23 | 2023-11-29 | トヨタ自動車株式会社 | Fuel cell system and aircraft |
US11757117B2 (en) | 2021-09-03 | 2023-09-12 | Hydrogenics Corporation | Fuel cell systems with series-connected subsystems |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5298851A (en) * | 1992-05-12 | 1994-03-29 | Transpo Electronics, Inc. | Multiple application voltage regulator system and method |
US5856035A (en) * | 1996-02-29 | 1999-01-05 | Gas Research Institute | Electrical connector apparatus for planar solid oxide fuel cell stacks |
US6296963B1 (en) * | 1997-11-14 | 2001-10-02 | Mitsubishi Heavy Industries, Ltd. | Solid oxide electrolyte fuel cell |
US6497974B2 (en) * | 2001-05-23 | 2002-12-24 | Avista Laboratories, Inc. | Fuel cell power system, method of distributing power, and method of operating a fuel cell power system |
US7087327B2 (en) * | 2002-05-16 | 2006-08-08 | Ballard Power Systems Inc. | Electric power plant with adjustable array of fuel cell systems |
US7247398B2 (en) * | 2003-04-14 | 2007-07-24 | General Motors Corporation | System stack contingency and efficiency switching |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61140071A (en) * | 1984-12-12 | 1986-06-27 | Toshiba Corp | Fuel cell plant |
JPH0278159A (en) * | 1988-09-13 | 1990-03-19 | Toshiba Corp | Route switching device for fuel cell |
JPH0696787A (en) * | 1992-07-28 | 1994-04-08 | Toshiba Syst Technol Kk | Fuel cell generating device |
US6387556B1 (en) | 1997-11-20 | 2002-05-14 | Avista Laboratories, Inc. | Fuel cell power systems and methods of controlling a fuel cell power system |
US6096449A (en) * | 1997-11-20 | 2000-08-01 | Avista Labs | Fuel cell and method for controlling same |
KR100584047B1 (en) | 2000-10-30 | 2006-05-30 | 지텍 코포레이션 | Multi-function energy system operable as a fuel cell, reformer, or thermal plant |
CN1272866C (en) | 2000-12-28 | 2006-08-30 | 三菱综合材料株式会社 | Fuel cell module, separator structure used therein and structure for gas supply to fuel cell |
JP3905748B2 (en) * | 2001-03-28 | 2007-04-18 | 三菱重工業株式会社 | Operation method of fuel cell power generation system and fuel cell power generation system |
JP4880836B2 (en) * | 2001-08-29 | 2012-02-22 | 本田技研工業株式会社 | Fuel cell stack and reaction gas supply method |
US6573682B1 (en) | 2001-12-14 | 2003-06-03 | Ballard Power Systems Inc. | Fuel cell system multiple stage voltage control method and apparatus |
US6942942B2 (en) | 2002-06-24 | 2005-09-13 | Delphi Technologies, Inc. | Solid-oxide fuel cell assembly having a thermal enclosure within a structural enclosure |
US7014929B2 (en) * | 2003-01-23 | 2006-03-21 | Hewlett-Packard Development Company, L.P. | Fuel cell |
JP3766069B2 (en) * | 2003-03-31 | 2006-04-12 | 株式会社東芝 | FUEL CELL PROTECTION CIRCUIT, FUEL CELL PROTECTION METHOD, AND FUEL CELL |
JP2005085509A (en) * | 2003-09-04 | 2005-03-31 | Nec Corp | Fuel cell system and its driving method |
JP2005203254A (en) * | 2004-01-16 | 2005-07-28 | Mitsubishi Materials Corp | Solid oxide fuel cell |
US7199636B2 (en) * | 2004-03-31 | 2007-04-03 | Matsushita Electric Industrial Co., Ltd. | Active diode |
FR2876503B1 (en) * | 2004-10-07 | 2007-02-16 | Renault Sas | ELECTRICITY PRODUCTION FACILITY COMPRISING SERIES BATTERIES FITTED WITH SERIES AND INCLUDING MEANS FOR ISOLATING A BATTERY AND METHOD FOR CONTROLLING SUCH A INSTALLATION |
KR100723395B1 (en) * | 2006-05-16 | 2007-05-30 | 삼성에스디아이 주식회사 | Control system of circuit connection for fuel cell and method of operating the same |
-
2007
- 2007-03-08 US US11/683,666 patent/US7799481B2/en active Active
-
2008
- 2008-03-10 EP EP08726702A patent/EP2118951A4/en not_active Withdrawn
- 2008-03-10 JP JP2009552772A patent/JP2010520606A/en active Pending
- 2008-03-10 WO PCT/US2008/003209 patent/WO2008112219A1/en active Application Filing
-
2010
- 2010-08-16 US US12/857,135 patent/US20110003219A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5298851A (en) * | 1992-05-12 | 1994-03-29 | Transpo Electronics, Inc. | Multiple application voltage regulator system and method |
US5856035A (en) * | 1996-02-29 | 1999-01-05 | Gas Research Institute | Electrical connector apparatus for planar solid oxide fuel cell stacks |
US6296963B1 (en) * | 1997-11-14 | 2001-10-02 | Mitsubishi Heavy Industries, Ltd. | Solid oxide electrolyte fuel cell |
US6497974B2 (en) * | 2001-05-23 | 2002-12-24 | Avista Laboratories, Inc. | Fuel cell power system, method of distributing power, and method of operating a fuel cell power system |
US7087327B2 (en) * | 2002-05-16 | 2006-08-08 | Ballard Power Systems Inc. | Electric power plant with adjustable array of fuel cell systems |
US7247398B2 (en) * | 2003-04-14 | 2007-07-24 | General Motors Corporation | System stack contingency and efficiency switching |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170220186A1 (en) * | 2013-11-13 | 2017-08-03 | Dell Products, Lp | Dynamic hover sensitivity and gesture adaptation in a dual display system |
Also Published As
Publication number | Publication date |
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EP2118951A1 (en) | 2009-11-18 |
WO2008112219A1 (en) | 2008-09-18 |
JP2010520606A (en) | 2010-06-10 |
US7799481B2 (en) | 2010-09-21 |
EP2118951A4 (en) | 2013-01-02 |
US20080220301A1 (en) | 2008-09-11 |
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