WO2010013714A1 - Système de pile à combustible et dispositif de charge - Google Patents

Système de pile à combustible et dispositif de charge Download PDF

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Publication number
WO2010013714A1
WO2010013714A1 PCT/JP2009/063432 JP2009063432W WO2010013714A1 WO 2010013714 A1 WO2010013714 A1 WO 2010013714A1 JP 2009063432 W JP2009063432 W JP 2009063432W WO 2010013714 A1 WO2010013714 A1 WO 2010013714A1
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WIPO (PCT)
Prior art keywords
fuel cell
output
fuel
power generation
power
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PCT/JP2009/063432
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English (en)
Japanese (ja)
Inventor
清司 瀬上
英徳 鈴木
泰人 武田
慎一郎 柳田
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株式会社 東芝
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Publication of WO2010013714A1 publication Critical patent/WO2010013714A1/fr

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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
    • H01M8/04537—Electric variables
    • H01M8/04604—Power, energy, capacity or load
    • H01M8/04619—Power, energy, capacity or load of fuel cell stacks
    • 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
    • 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 present invention relates to a fuel cell system and a charging device to which the fuel cell system is applied.
  • a fuel cell has the advantage that it can generate electric power only by supplying fuel and air, and can generate electric power continuously by exchanging only the fuel. Therefore, if the fuel cell can be miniaturized, it is extremely effective as a power source for small electronic devices.
  • DMFC direct methanol fuel cell
  • DMFCs are classified according to the liquid fuel supply method, and the active fuel cell such as the gas supply type that supplies gaseous fuel or the liquid supply type that supplies liquid fuel, and the liquid fuel in the fuel storage section are vaporized inside the cell.
  • the passive type fuel cell such as an internal vaporization type that is supplied to the fuel electrode.
  • the passive type is particularly advantageous for downsizing the DMFC.
  • Patent Document 1 As such a passive DMFC, a membrane electrode assembly (fuel cell) having a fuel electrode, an electrolyte membrane, and an air electrode is composed of a resin box-like container. The thing of the structure arrange
  • Patent Documents 2 to 4 disclose a configuration in which a DMFC fuel cell and a fuel storage portion are connected via a flow path.
  • the amount of liquid fuel supplied can be adjusted based on the shape and diameter of the flow path by supplying the liquid fuel supplied from the fuel storage unit to the fuel cell via the flow path. It is said.
  • liquid fuel is supplied from a fuel storage portion to a flow path by a pump.
  • Patent Document 3 also describes that an electric field forming unit that forms an electroosmotic flow in the flow path is used instead of the pump.
  • Patent Document 4 describes that liquid fuel or the like is supplied using an electroosmotic flow pump.
  • such a fuel cell system using the DMFC as a main power generation unit may be used as a charging device for charging a secondary battery, which is an internal power source of an electronic device, from the outside.
  • Such a charging device is provided with a storage element, for example, a secondary battery as an internal power source, and charges the secondary battery by the power generation output of the DMFC, and also enables power supply from the secondary battery to the electronic circuit inside the device. ing.
  • a storage element for example, a secondary battery as an internal power source
  • Patent Documents 5 and 6 both charge the secondary battery by the fuel cell only when the output power of the fuel cell exceeds the power requirement of the load. For this reason, for example, if the power demand of the load is large and the battery is used for a long time and the secondary battery may not be sufficiently charged, the remaining battery level may be extremely low. There arises a situation in which sufficient power cannot be supplied from the secondary battery to the electronic circuit inside the device, and the operation of the device itself becomes unstable.
  • An object of the present invention is to provide a fuel cell system and a charging device that can stably charge a storage element of an internal power source and can always obtain a stable operation.
  • a fuel cell main body that generates electric power by supplying fuel and supplies power generation output to a load;
  • a load request detector for detecting an output required by the load to the fuel cell body;
  • a charge state selection unit that selects a charge state for the power storage element according to the magnitude of the required output detected by the load request detection unit;
  • a control unit that supplies a predetermined power generation output as a charging output of the power storage element among the power generation outputs of the fuel cell main body according to the charging state selected by the charging state selection unit;
  • a fuel cell system is provided.
  • An output adjustment unit that generates an output supplied to the load from a power generation output of the fuel cell main body, and the load request detection unit detects an output current of the output adjustment unit as a request output requested by the load.
  • a fuel cell system is provided.
  • the charge state selection unit is configured to determine a ratio of the power generation output supplied to the power storage element in the power generation output of the fuel cell main body according to the magnitude of the required output detected by the load request detection unit.
  • a fuel cell system is provided.
  • a fuel cell system of the third invention in which the control unit can supply all of the power generation output of the fuel cell main body as the charge output of the power storage element according to the charge state selected by the charge state selection unit.
  • a charging device fuel cell system to which the fuel cell system according to the first to fourth inventions is applied.
  • the present invention it is possible to provide a fuel cell system and a charging device that can stably charge the storage element of the internal power supply and can always obtain a stable operation.
  • FIG. 1 is a block diagram schematically showing the configuration of the fuel cell system according to the first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view schematically showing an enlarged structure of the fuel cell main body shown in FIG. 3 is a perspective view schematically showing a fuel distribution mechanism used in the fuel cell main body shown in FIG.
  • FIG. 4 is a block diagram schematically showing the charge control circuit shown in FIG.
  • FIG. 5 is a waveform diagram showing the operation of each part in the fuel cell system shown in FIG.
  • FIG. 1 shows a schematic configuration of a fuel cell system applied to the charging apparatus according to the first embodiment of the present invention.
  • reference numeral 1 denotes a fuel cell main body (DMFC).
  • the fuel cell main body 1 includes a fuel cell power generation unit (cell) 101 that constitutes an electromotive unit, a fuel storage unit 102 that stores liquid fuel, and a fuel storage unit 102. And a flow path 103 connecting the fuel cell power generation unit (cell) 101 and a pump 104 as a fuel supply control unit for transferring liquid fuel from the fuel storage unit 102 to the fuel cell power generation unit (cell) 101. .
  • FIG. 2 is a cross-sectional view for explaining the fuel cell main body 1 in more detail.
  • the fuel cell power generation unit 101 includes an anode (fuel electrode) 13 having an anode catalyst layer 11 and an anode gas diffusion layer 12, and a cathode (cathode catalyst layer 14 and cathode gas diffusion layer 15).
  • MEA Membrane Electrode Assembly
  • examples of the catalyst contained in the anode catalyst layer 11 and the cathode catalyst layer 14 include a simple substance of a platinum group element such as Pt, Ru, Rh, Ir, Os, and Pd, an alloy containing the platinum group element, and the like. It is done.
  • the anode catalyst layer 11 is preferably made of Pt—Ru, Pt—Mo, or the like that has strong resistance to methanol, carbon monoxide, or the like.
  • Pt, Pt—Ni or the like is preferably used for the cathode catalyst layer 14.
  • the catalyst is not limited to these, and various substances having catalytic activity can be used.
  • the catalyst may be either a supported catalyst using a conductive support such as a carbon material or an unsupported catalyst.
  • Examples of the proton conductive material constituting the electrolyte membrane 17 include fluorine-based resins (Nafion (trade name, manufactured by DuPont) and Flemion (trade name, manufactured by Asahi Glass Co., Ltd.) such as a perfluorosulfonic acid polymer having a sulfonic acid group. Etc.), organic materials such as hydrocarbon resins having sulfonic acid groups, or inorganic materials such as tungstic acid and phosphotungstic acid.
  • fluorine-based resins Nafion (trade name, manufactured by DuPont) and Flemion (trade name, manufactured by Asahi Glass Co., Ltd.)
  • organic materials such as hydrocarbon resins having sulfonic acid groups
  • inorganic materials such as tungstic acid and phosphotungstic acid.
  • the proton conductive electrolyte membrane 17 is not limited to these.
  • the anode gas diffusion layer 12 laminated on the anode catalyst layer 11 serves to uniformly supply fuel to the anode catalyst layer 11 and also serves as a current collector for the anode catalyst layer 11.
  • the cathode gas diffusion layer 15 laminated on the cathode catalyst layer 14 serves to uniformly supply the oxidant to the cathode catalyst layer 14 and also serves as a current collector for the cathode catalyst layer 14.
  • the anode gas diffusion layer 12 and the cathode gas diffusion layer 15 are made of a porous substrate.
  • a conductive layer is laminated on the anode gas diffusion layer 12 and the cathode gas diffusion layer 15 as necessary.
  • these conductive layers for example, a porous layer (for example, mesh) made of a conductive metal material such as Au or Ni, a porous film, a foil body, a conductive metal material such as stainless steel (SUS), gold or the like.
  • a composite material coated with a highly conductive metal is used.
  • a rubber O-ring 19 is interposed between the electrolyte membrane 17 and a fuel distribution mechanism 105 and a cover plate 18 described later. This O-ring 19 prevents fuel leakage and oxidant leakage from the fuel cell power generation unit 101.
  • the cover plate 18 has an opening (not shown) for taking in air as an oxidizing agent.
  • a moisture retaining layer and a surface layer are disposed between the cover plate 18 and the cathode 16 as necessary.
  • the moisturizing layer is impregnated with a part of the water generated in the cathode catalyst layer 14 to suppress the transpiration of water and promote uniform diffusion of air to the cathode catalyst layer 14.
  • the surface layer adjusts the amount of air taken in, and has a plurality of air inlets whose number, size, etc. are adjusted according to the amount of air taken in.
  • a fuel distribution mechanism 105 is disposed on the anode (fuel electrode) 13 side of the fuel cell power generation unit 101.
  • a fuel storage unit 102 is connected to the fuel distribution mechanism 105 via a liquid fuel flow path 103 such as a pipe.
  • the fuel storage unit 102 stores liquid fuel corresponding to the fuel cell power generation unit 101.
  • the liquid fuel include methanol fuels such as aqueous methanol solutions of various concentrations and pure methanol.
  • the liquid fuel is not necessarily limited to methanol fuel.
  • the liquid fuel may be, for example, an ethanol fuel such as an ethanol aqueous solution or pure ethanol, a propanol fuel such as a propanol aqueous solution or pure propanol, a glycol fuel such as a glycol aqueous solution or pure glycol, dimethyl ether, formic acid, or other liquid fuel.
  • liquid fuel corresponding to the fuel cell power generation unit 101 is stored in the fuel storage unit 102.
  • Fuel is introduced into the fuel distribution mechanism 105 from the fuel storage unit 102 via the flow path 103.
  • the flow path 103 is not limited to piping independent of the fuel distribution mechanism 105 and the fuel storage unit 102.
  • a fuel flow path connecting them may be used.
  • the fuel distribution mechanism 105 only needs to be connected to the fuel storage unit 102 via the flow path 103.
  • the fuel distribution mechanism 105 includes at least one fuel inlet 21 through which fuel flows in via the flow path 103, and a plurality of fuel outlets for discharging the fuel and its vaporized components. And a fuel distribution plate 23 having 22. Inside the fuel distribution plate 23, as shown in FIG. 2, a gap portion 24 is provided that serves as a fuel passage led from the fuel injection port 21. The plurality of fuel discharge ports 22 are directly connected to gaps 24 that function as fuel passages.
  • the fuel introduced from the fuel injection port 21 into the fuel distribution mechanism 105 enters the gap 24 and is guided to the plurality of fuel discharge ports 22 through the gap 24 that functions as the fuel passage.
  • a gas-liquid separator (not shown) that transmits only the vaporized component of the fuel and does not transmit the liquid component may be disposed in the plurality of fuel discharge ports 22.
  • the fuel vaporization component is supplied to the anode (fuel electrode) 13 of the fuel cell power generation unit 101.
  • the gas-liquid separator may be installed as a gas-liquid separation membrane or the like between the fuel distribution mechanism 105 and the anode 13.
  • the vaporized component of the fuel is discharged from a plurality of fuel discharge ports 22 toward a plurality of locations on the anode 13.
  • a plurality of fuel discharge ports 22 are provided on the surface of the fuel distribution plate 23 in contact with the anode 13 so that fuel can be supplied to the entire fuel cell power generation unit 101.
  • the number of the fuel discharge ports 22 may be two or more. However, in order to equalize the fuel supply amount in the plane of the fuel cell power generation unit 101, the fuel discharge ports 22 of 0.1 to 10 / cm 2 are provided. It is preferable to form it so that it exists.
  • a pump 104 as a fuel transfer control unit is inserted into a flow path 103 that connects between the fuel distribution mechanism 105 and the fuel storage unit 102.
  • the pump 104 is not a circulation pump through which fuel is circulated, but is a fuel supply pump that transfers fuel from the fuel storage unit 102 to the fuel distribution mechanism 105 to the last.
  • a rotary vane pump, an electroosmotic pump, a diaphragm pump, a squeezing pump, etc. should be used as the pump 104 from the viewpoint that a small amount of fuel can be sent with good controllability and can be reduced in size and weight. Is preferred.
  • a rotary vane pump feeds liquid by rotating a wing with a motor.
  • the electroosmotic flow pump uses a sintered porous material such as silica that causes an electroosmotic flow phenomenon.
  • the diaphragm pump is a pump that feeds liquid by driving the diaphragm with an electromagnet or piezoelectric ceramics.
  • the squeezing pump presses a part of a flexible fuel flow path and squeezes the fuel.
  • a fuel supply control circuit 9 to be described later is connected to the pump 104, and the drive of the pump 104 is controlled. This point will be described later.
  • the fuel stored in the fuel storage unit 102 is transferred through the flow path 103 by the pump 104 and supplied to the fuel distribution mechanism 105.
  • the fuel released from the fuel distribution mechanism 105 is supplied to the anode (fuel electrode) 13 of the fuel cell power generation unit 101.
  • the fuel diffuses through the anode gas diffusion layer 12 and is supplied to the anode catalyst layer 11.
  • methanol fuel is used as the fuel, an internal reforming reaction of methanol shown in the following formula (1) occurs in the anode catalyst layer 11.
  • the water generated in the cathode catalyst layer 14 or the water in the electrolyte membrane 17 is reacted with methanol to cause the internal reforming reaction of the formula (1).
  • the internal reforming reaction is caused by another reaction mechanism that does not require water.
  • Electrons (e ⁇ ) generated by this reaction are guided to the outside via a current collector, supplied to the load side as so-called output, and then guided to the cathode (air electrode) 16. Further, protons (H + ) generated by the internal reforming reaction of the formula (1) are guided to the cathode 16 through the electrolyte membrane 17. Air is supplied to the cathode 16 as an oxidant. Electrons (e ⁇ ) and protons (H + ) reaching the cathode 16 react with oxygen in the air in accordance with the following equation (2) in the cathode catalyst layer 14, and water is generated with this reaction.
  • the fuel cell main body 1 configured as described above is connected to a DC-DC converter (voltage adjustment circuit) 2, a charge control circuit 3, and an output detection unit 4 as an output adjustment unit.
  • the DC-DC converter 2 includes a switching element and an energy storage element (not shown).
  • the DC-DC converter 2 stores / discharges the electric energy generated by the fuel cell body 1 by the switching element and the energy storage element, An output generated by boosting a relatively low output voltage to a sufficient voltage is generated.
  • the standard boost type DC-DC converter 2 is shown here, other circuit systems can be used as long as the boost operation is possible.
  • the charge control circuit 3 is connected to a chargeable / dischargeable secondary battery such as a lithium ion rechargeable battery (hereinafter referred to as LIB) 5 as a power storage element.
  • LIB lithium ion rechargeable battery
  • the LIB 5 is used as a power source for each electronic circuit in the fuel cell system, and the charge state is controlled by the charge control circuit 3. Note that an electric double layer capacitor can be used instead of LIB 5 as the power storage element.
  • the output detection unit 4 detects the state of the electric power generated by the fuel cell main body 1.
  • the output detection unit 4 detects the output voltage (or output current) of the output of the fuel cell main body 1, and uses this detection result as the fuel cell.
  • the generated power output from the main body 1 is output to the control unit 8.
  • the load request detector 6 and an electronic device 7 as a load are connected to the DC-DC converter 2.
  • the electronic device 7 includes an electronic device main body 71, a charging circuit 72, and a LIB 73 as a power storage element, and the LIB 73 can be charged by an output from the DC-DC converter 2.
  • the LIB 73 is used as a power source of the electronic device main body 71 and is charged by the charging circuit 72 in a state where the DC-DC converter 2 of the fuel cell system is connected to the electronic device 7.
  • the load request detection unit 6 detects an output requested by the electronic device 7 to the fuel cell main body 1.
  • the load request detection unit 6 detects an output current of the DC-DC converter 2 as an output requested by the electronic device 7, This request is output to the control unit 8.
  • the output current of the DC-DC converter 2 varies depending on the remaining charge of the LIB 73, and from this, the load requires the output current of the DC-DC converter 2 that varies depending on the remaining charge of the LIB 73. Detect as.
  • the LIB 5 is connected to a fuel supply control circuit 9 as an electronic circuit inside the fuel cell system and other electronic circuits (not shown), and is used as a power source for these electronic circuits.
  • the fuel supply control circuit 9 controls the operation of the pump 104 and controls the pump 104 on / off based on an instruction from the control unit 8.
  • the control unit 8 controls the entire system and has a charge state selection unit 81.
  • the charge state selection unit 81 selects a charge state for the LIB 5 based on the power generation output detected by the output detection unit 4 and the request output detected by the load request detection unit 6, and the charge control circuit 3 based on the selection result.
  • the charging state selection unit 81 is, for example, (a) an electronic device detected by the load request detection unit 6 on the condition that the power generation output of the fuel cell main body 1 detected by the output detection unit 4 is sufficient.
  • FIG. 4 is for explaining the charge control circuit 3 in detail, and the same parts as those in FIG.
  • reference numeral 100 denotes a fuel cell system as a charging device.
  • the fuel cell system 100 is provided with the fuel cell main body 1, the DC-DC converter 2, the charge control circuit 3, and the control unit 8 described above.
  • the fuel cell system 100 is provided with an output terminal 111 and a DC terminal 112.
  • the electronic device 7 is connected to the output terminal 111, and the AC adapter 10 can be connected to the DC terminal 112.
  • the AC adapter 10 generates DC power from an AC power source (not shown) (for example, commercial power source), and the LIB 5 can be charged by the DC power via a charging IC 303 described later.
  • the charging control circuit 3 has an input terminal 301, a charging terminal 302, and a charging IC 303.
  • the fuel cell body 1 is connected to the input terminal 301, and the LIB 5 is connected to the charging terminal 302.
  • the charging IC 303 controls charging of the LIB 5 based on an instruction from the charging state selection unit 81 of the control unit 8, and the input terminal 301, the DC terminal 102, and the DC-DC converter 2 are connected to the input terminal IN.
  • the charging terminal 302 is connected to the output terminal OUT.
  • a current control circuit 304 is connected to the control terminal CONT of the charging IC 303.
  • the current control circuit 304 has a configuration in which a resistor R0, a series circuit of a switching element Q1 made of a resistor R1 and a field effect transistor, and a series circuit of a resistor R2 and a switching element Q2 made of a field effect transistor are connected in parallel.
  • the charging current to the LIB 5 by the charging IC 303 is controlled by the combination of R0, R1, and R2. In this case, when the above-described (a) is selected by the charging state selection unit 81, the charging IC 303 shuts down the charging current for the LIB 5.
  • the switching elements Q1 and Q2 of the current control circuit 304 are turned off, and the charging IC 303 uses the resistance R0 of the current control circuit 304 to generate 20 of the power generation output of the fuel cell main body 1. % Is supplied as the charging current of LIB5. Further, when (c) described above is selected, only the switching element Q1 of the current control circuit 304 is turned on, and the charging IC 303 uses the combination of the resistors R0 and R1 of the current control circuit 304 to generate power from the fuel cell body 1. 50% of the output is supplied as LIB5 charging current.
  • the output generated by the fuel cell power generation unit 101 is boosted to a sufficient voltage by the DC-DC converter 2. And supplied to the electronic device 7. Thereby, in the electronic device 7, the LIB 73 is charged via the charging circuit 72 by the output current of the DC-DC converter 2.
  • the LIB 73 is used as a power source for the electronic device main body 71.
  • the state of the electric power generated by the fuel cell main body 1 is detected by the output detection unit 4, and the required output for the fuel cell main body 1 of the electronic device 7 is detected by the load request detection unit 6.
  • the load request detection unit 6 For example, when the electronic device 7 is frequently used and the LIB 73 of the power source is consumed so much that the charging circuit 72 is constantly charging, the request output on the electronic device 7 side from the load request detecting unit 6 The maximum is detected. Then, the charge state selection unit 81 of the control unit 8 selects (a) described above on the condition that the power generation output of the fuel cell main body 1 detected by the output detection unit 4 is sufficient.
  • the charging current for the LIB 5 is shut down according to the instruction (a) of the charging state selection unit 81 in accordance with the instruction (a) of the charging state selection unit 81 of the charging control circuit 3, and the supply of the charging current to the LIB 5 is stopped. To do. Thereby, all of the power generation output of the fuel cell main body 1 is supplied to the electronic device 7 side.
  • the period A in FIG. 5 shows this state, and as shown in FIG. 5B, the output current of the DC-DC converter 2 corresponding to all of the power generation output of the fuel cell main body 1 is supplied to the electronic device 7.
  • the charging current for LIB 5 does not flow at all.
  • 5A shows the output voltage of the DC-DC converter 2
  • FIG. 5C shows the charging voltage of the LIB 5.
  • the charging state selection unit 81 of the control unit 8 determines that the power generation output of the fuel cell main body 1 detected by the output detection unit 4 is not sufficient, the system cannot operate normally by displaying that fact. This is notified to the user.
  • the charging state selecting unit 81 outputs The above-described (b) is selected on the condition that the power generation output of the fuel cell main body 1 detected by the detection unit 4 is sufficient. Then, according to the instruction (b) of the charging state selection unit 81 at this time, the switching elements Q1 and Q2 of the current control circuit 304 are turned off, and the charging IC 303 determines the fuel based on the resistance R0 of the current control circuit 304. 20% of the power generation output of the battery body 1 is supplied as the charging current of the LIB 5. A period B in FIG.
  • FIG. 5 shows this state, and as shown in FIG. 5D, an output corresponding to 20% of the power generation output of the fuel cell body 1 is supplied as a charging current for the LIB 5, and FIG. ),
  • the output current of the DC-DC converter 2 corresponding to 80% of the power generation output of the fuel cell main body 1 is supplied to the electronic device 7.
  • FIG. 5A shows the output voltage of the DC-DC converter 2
  • FIG. 5C shows the charging voltage of the LIB 5.
  • the charging state selecting unit 81 detects the fuel cell main body 1 detected by the output detecting unit 4.
  • the above-mentioned (c) is selected on the condition that the power generation output is sufficient.
  • only the switching element Q1 of the current control circuit 304 is turned on according to the instruction (c) of the charge state selection unit 81 at this time, and the charging IC 303 is based on the combination of the resistors R0 and R1 of the current control circuit 304.
  • 50% of the power generation output of the fuel cell main body 1 is supplied as the charging current of the LIB 5.
  • FIG. 5 shows this state, and as shown in FIG. 5D, an output corresponding to 50% of the power generation output of the fuel cell main body 1 is supplied as a charging current for the LIB 5, and FIG. ),
  • the output current of the DC-DC converter 2 corresponding to 50% of the power generation output of the fuel cell main body 1 is supplied to the electronic device 7.
  • FIG. 5A shows the output voltage of the DC-DC converter 2
  • FIG. 5C shows the charging voltage of the LIB 5.
  • the charge state selection unit 81 is detected by the output detection unit 4.
  • the above (d) is selected on condition that the power generation output of the fuel cell body 1 is sufficient.
  • only the switching element Q2 of the current control circuit 304 is turned on according to the instruction (d) of the charge state selection unit 81 at this time, and the charging IC 303 is based on the combination of the resistors R0 and R2 of the current control circuit 304.
  • a period D in FIG. 5 shows this state. As shown in FIG.
  • FIG. 5D an output corresponding to 100% of the power generation output of the fuel cell main body 1 is supplied as a charging current for the LIB 5, and FIG. ), The output current of the DC-DC converter 2 supplied to the electronic device 7 becomes substantially zero.
  • FIG. 5A shows the output voltage of the DC-DC converter 2
  • FIG. 5C shows the charging voltage of the LIB 5.
  • the charging state selecting unit 81 detects the power generation output of the fuel cell main body 1 detected by the output detecting unit 4. (B) is selected again on the condition that is sufficient. Then, according to the instruction (b) of the charging state selection unit 81 at this time, the switching elements Q1 and Q2 of the current control circuit 304 are turned off, and the charging IC 303 determines the fuel based on the resistance R0 of the current control circuit 304.
  • FIG. 5A shows the output voltage of the DC-DC converter 2
  • FIG. 5C shows the charging voltage of the LIB 5.
  • the fuel cell main body 1 which supplies electric power generation output to the electronic device 7, and it is used as an internal power supply charged by the electric power generation output of this fuel cell main body 1.
  • the LIB 5 is included, and the charge state selection unit 81 determines the output of the fuel cell main body 1 according to the magnitude of the required output acquired from the load request detection unit 6 that detects the output requested by the electronic device 7 to the fuel cell main body 1.
  • the ratio of the power generation output supplied to the LIB 5 among the power generation outputs is selected as the charging state for the LIB 5, and a part of the power generation output of the fuel cell body 1 is charged to the LIB 5 according to the selected charging state. As a supply.
  • the LIB 5 can be stably charged with a part of the power generation output of the fuel cell main body 1 according to the magnitude of the required output of the electronic device 7, so that the battery level of the LIB 5 is extremely reduced.
  • the system internal power supply can be secured stably. As a result, sufficient power can be supplied to the electronic circuits inside the system by the internal power supply LIB5. Obtainable.
  • the surplus output can be used for charging the LIB 5, so that the energy loss can be greatly reduced and the fuel Can be used effectively.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage.
  • the present invention can also be applied as a charging device for other loads.
  • the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. If the above effect is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.
  • the vaporized component of the liquid fuel supplied to the fuel cell power generation unit may be all supplied as the vaporized component of the liquid fuel, but the present invention is applied even when a part is supplied in the liquid state. be able to.
  • a fuel cell system and a charging device that can stably charge a storage element of an internal power source and can always obtain a stable operation.
  • SYMBOLS 1 Fuel cell main body, 101 ... Fuel cell power generation part 102 ... Fuel accommodating part, 103 ... Flow path 104 ... Pump, 105 ... Fuel distribution mechanism 2 ... DC-DC converter, 3 ... Charge control circuit 301 ... Input terminal, 302 ... Charging terminal 303 ... IC for charging, 304 ... Current control circuit 4 ... Output detection unit, 5 ... LIB, 6 ... Load request detection unit 7 ... Electronic device, 71 ... Electronic device main body 72 ... Charging circuit, 73 ... LIB DESCRIPTION OF SYMBOLS 8 ... Control part, 81 ... Charge condition selection part 9 ... Fuel supply control circuit, 10 ... AC adapter 11 ...

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  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention porte sur un système de pile à combustible comprenant: un corps de pile à combustible (1) alimenté en carburant pour produire de l'énergie électrique et la transférer à un dispositif électronique (7); et un LIB (5) chargé par l'énergie électrique produite par le corps de la pile à combustible (1) et utilisé comme source d'énergie interne. Une unité de détection de la demande de charge (6) détecte l'énergie demandée au corps de la pile à combustible (1) par le dispositif électronique (7). En fonction de la partie acquise de l'énergie demandée, une unité de sélection (81) de l'état de charge sélectionne le rapport "énergie à fournir au LIB (5)/énergie totale fournie par le corps de la pile à combustible (1)" en tant qu'état de charge du LIB (5) et fournit une énergie prédéterminé en tant qu'énergie de charge du LIB (5) en fonction de l'état de charge sélectionné.
PCT/JP2009/063432 2008-07-29 2009-07-28 Système de pile à combustible et dispositif de charge WO2010013714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-195131 2008-07-29
JP2008195131A JP2010033903A (ja) 2008-07-29 2008-07-29 燃料電池システム及び充電装置

Publications (1)

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WO2010013714A1 true WO2010013714A1 (fr) 2010-02-04

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JP (1) JP2010033903A (fr)
WO (1) WO2010013714A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6085759B2 (ja) * 2012-10-15 2017-03-01 アクアフェアリー株式会社 発電装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006049175A (ja) * 2004-08-06 2006-02-16 Sanyo Electric Co Ltd 燃料電池システム
JP2006073503A (ja) * 2004-08-06 2006-03-16 Sanyo Electric Co Ltd 燃料電池システム
JP2006166576A (ja) * 2004-12-07 2006-06-22 Ricoh Co Ltd 電源システム及び画像形成装置
JP2006310246A (ja) * 2004-08-06 2006-11-09 Sanyo Electric Co Ltd 燃料電池システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006049175A (ja) * 2004-08-06 2006-02-16 Sanyo Electric Co Ltd 燃料電池システム
JP2006073503A (ja) * 2004-08-06 2006-03-16 Sanyo Electric Co Ltd 燃料電池システム
JP2006310246A (ja) * 2004-08-06 2006-11-09 Sanyo Electric Co Ltd 燃料電池システム
JP2006166576A (ja) * 2004-12-07 2006-06-22 Ricoh Co Ltd 電源システム及び画像形成装置

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