WO2008029948A1 - Système de pile à combustible - Google Patents
Système de pile à combustible Download PDFInfo
- Publication number
- WO2008029948A1 WO2008029948A1 PCT/JP2007/067687 JP2007067687W WO2008029948A1 WO 2008029948 A1 WO2008029948 A1 WO 2008029948A1 JP 2007067687 W JP2007067687 W JP 2007067687W WO 2008029948 A1 WO2008029948 A1 WO 2008029948A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- fuel cell
- liquid separator
- cell system
- pipe
- Prior art date
Links
Classifications
-
- 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
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04164—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by condensers, gas-liquid separators or filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
-
- 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
-
- 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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
-
- 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
- H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
-
- 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
- H01M8/2465—Details of groupings of fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
Definitions
- the present invention relates to a fuel cell system including a fuel cell stack that receives a reaction gas and generates electric power through an electrochemical reaction.
- a fuel cell used in this fuel cell system is configured, for example, by fixing a fuel cell stack in which a plurality of single cells are stacked to an end plate.
- This fuel cell is connected to an exhaust pipe through which the off-gas to be discharged flows, and this exhaust pipe is provided with a gas-liquid separator that separates off-gas gas-liquid flowing through the exhaust pipe (for example, 2 0 0 5—3 3 2 6 7 6). Disclosure of the invention
- an object of the present invention is to provide a fuel cell system capable of suppressing freezing of moisture inside the gas-liquid separator.
- a fuel cell system of the present invention comprises a plurality of cells that generate power by an electrochemical reaction between a fuel gas and an oxidizing gas, and a pair of cells disposed at both ends in the cell stacking direction.
- the gas-liquid separator can be satisfactorily heated by effectively using the exhaust heat.
- the gas-liquid separator may include a ribbon portion that separates droplets by turning the introduced off gas into a swirl flow, and the ribbon portion may be disposed adjacent to the end plate.
- the distance between the fuel cell stack and the ribbon portion can be shortened, and thereby the off-gas discharged from the fuel cell stack can be swirled at a high flow rate, so that the separation performance is improved.
- the end plate and the ribbon portion are disposed adjacent to each other, an increase in the heat capacity of the member that occurs when a member is disposed between them can be suppressed, and the heating efficiency can be improved.
- a circulation pump that returns off-gas to the fuel cell stack is connected to the gas discharge port of the gas-liquid separator via a pipe, a folding portion that turns back at an angle exceeding 90 degrees is provided in the pipe. It may be done.
- the gas-liquid separator may be provided with a water discharge port in a lateral direction, and a bottom portion may be inclined forward and downward toward the water discharge port.
- a concave portion recessed downward is formed in the bottom portion so as to extend along the inclination direction of the bottom portion, and the water discharge port may be provided on the extension of the concave portion.
- the bottom portion may be configured such that an inclination angle of a side bottom portion other than the concave portion is larger than an inclination angle of the concave portion.
- the gas-liquid separator by fixing the gas-liquid separator to the end plate, the gas-liquid separator can be satisfactorily heated by effectively utilizing the exhaust heat of the fuel cell stack. Therefore, freezing of moisture inside the gas-liquid separator can be suppressed.
- FIG. 1 is a configuration diagram showing a first embodiment of a fuel cell system according to the present invention.
- FIG. 2 is a plan view of the stack case of the first embodiment of the fuel cell system according to the present invention and the interior thereof.
- FIG. 3A shows a main part of the first embodiment of the fuel cell system according to the present invention, and is a plan view in which a circulation pump and the like are omitted, and FIG. 3B is a front view thereof.
- FIG. 4 is a side sectional view showing the ribbon portion of the first embodiment of the fuel cell system according to the present invention.
- FIG. 5 is a view showing the ribbon portion of the first embodiment of the fuel cell system according to the present invention as viewed from the flange portion side.
- FIG. 6 is a perspective view showing the gas-liquid separator of the second embodiment of the fuel cell system according to the present invention.
- FIG. 7A is a side view showing a gas-liquid separator of a second embodiment of the fuel cell system according to the present invention
- FIG. 7B is a front view thereof.
- FIG. 1 is a system configuration diagram of the fuel cell system 1.
- This fuel cell system System 1 is used as an in-vehicle power generation system for fuel cell vehicles, power generation systems for all moving objects such as ships, aircraft, trains or walking robots, and also as power generation equipment for buildings (homes, buildings, etc.) Although it can be applied to stationary power generation systems, it is specifically for automobiles.
- the fuel cell system 1 includes a fuel cell 10 that is supplied with a reaction gas (oxidation gas and fuel gas) and generates electric power through an electrochemical reaction. For example, air as an oxidation gas to the fuel cell 10 is supplied.
- a cathodic oxidizing gas piping system 2 for adjusting the gas supply and an anode fuel gas piping system 3 for adjusting a gas supply of, for example, hydrogen gas as a fuel gas are provided.
- the oxidizing gas piping system 2 includes an air supply piping 21 for supplying the oxidizing gas (air) humidified by the humidifier 20 to the fuel cell 10 and a humidifier for the oxidized off-gas discharged from the fuel cell 10.
- An exhaust pipe 2 2 leading to 20 and a discharge pipe 2 3 for guiding the oxidant off-gas from the humidifier 20 to the outside are provided.
- the air supply pipe 21 is provided with a compressor 24 that takes in the oxidizing gas in the atmosphere and pumps it to the humidifier 20.
- the fuel gas piping system 3 includes a hydrogen tank 30 as a fuel supply source storing high-pressure hydrogen gas, a fuel supply piping 31 for supplying the hydrogen gas from the hydrogen tank 30 to the fuel cell 10, a fuel An exhaust pipe 3 2 through which hydrogen off-gas as an off-gas of the fuel gas discharged from the battery 10 flows, and a circulation pipe 3 3 for returning the hydrogen off-gas from the exhaust pipe 3 2 to the fuel supply pipe 3 1 are provided.
- the fuel supply pipe 3 1 is provided with a shutoff valve regulator that shuts off or allows the supply of hydrogen gas from the hydrogen tank 30 and adjusts the pressure of the hydrogen gas when permitted to supply fuel gas to the fuel cell 10.
- 3 4 is provided.
- an injector that adjusts the upstream gas state (flow rate, pressure, temperature, molar concentration, etc.) and supplies it to the downstream side may be provided.
- the exhaust piping 3 2 is a circulation piping for hydrogen off-gas discharged from the fuel cell 10
- a gas-liquid separator 35 is provided to re-supply the fuel cell 1 via 3 3. This gas-liquid separator 35 separates the gas-liquid of the hydrogen off-gas discharged from the fuel cell 10, and specifically recovers moisture from the hydrogen off-gas.
- An exhaust / drain valve 3 6 is connected to the gas-liquid separator 3 5, and an exhaust pipe 3 7 is connected to the exhaust / drain valve 3 6.
- the exhaust / drain valve 3 6 is operated by a command from a control device (not shown) to discharge moisture collected by the gas-liquid separator 35 and hydrogen off-gas containing impurities in the exhaust pipe 3 2. 3 It is discharged (purged) to the outside through 7.
- the circulation pipe 3 3 is discharged from the fuel cell 10 by suctioning and pressurizing the hydrogen gas in the circulation pipe 3 3 discharged from the fuel cell 10 and discharging it to the fuel supply pipe 3 1 side.
- a circulation pump 38 is provided to regulate the circulation of gas.
- the discharge pipe 37 is provided with a diluter 39 for diluting the hydrogen off gas with the oxidation off gas from the discharge pipe 23.
- Oxidized gas and power that have been humidified by the humidifier 20 through the air supply pipe 21 by the pressure feed by 24 and introduced into the fuel cell 10 cause an electrochemical reaction in the fuel cell 10, and generate electricity.
- the hydrogen off-gas from the fuel cell 10 is introduced into the gas-liquid separator 3 5 in the exhaust pipe 3 2, introduced into the fuel supply pipe 3 1 through the circulation pipe 3 3 by the circulation pump 3 8, and again Introduced into the fuel cell 10. Further, when the exhaust drain valve 3 6 is opened at an appropriate timing, the hydrogen off-gas from the fuel cell 10 is introduced from the gas-liquid separator 3 5 to the diluter 3 9 via the discharge pipe 37, and this In the diluter 39, it is diluted with the oxidizing off gas discharged from the fuel cell 10 and discharged to the outside.
- the fuel cell 10 is supplied with a reaction gas and receives an electrochemical reaction.
- Multiple (two) fuel cell stacks 5 1, 5 1 configured by stacking the required number of single cells 50 that generate electricity according to the stack, and stacking these fuel cell stacks 5 1, 5 1 into single cells 50
- a pair of end plates 5 2, 5 3 that are arranged parallel to each other and sandwiched from both ends in the stacking direction, and a tension plate (not shown) that connects the end plates 5 2, 5 3, Case 5 4
- the stacking direction of the unit cells 50 is set to the horizontal direction, and the juxtaposed direction of the fuel cell stacks 51, 51 is set to the horizontal direction. It will be installed on the car body in the posture. At this time, since a traction motor (not shown) is disposed below the stack case 54, the height of the stack case 54 is limited by the traction motor due to space constraints. In the following, the posture will be described when installed on the vehicle body.
- the hydrogen off-gas discharge flow path 5 discharged from the fuel cell stacks 5 1 and 5 1 is connected to the end plate 5 2 on the vehicle rear side of the fuel cell 10 described above.
- 5 and 5 5 are open, and the exhaust pipe 3 2 is connected to the discharge channels 5 5 and 5 5.
- the gas-liquid separator 35 of the exhaust pipe 32 is fixed to the end plate 52.
- the gas-liquid separator 35 includes a ribbon portion 60 fixed immediately near the end plate 52, one end connected to the opposite side of the end plate 52 of the ribbon portion 60, and the other end end 5 2 is provided with a pipe 61 made of a pipe member that bends along the surface direction of 2 and a separation part 62 connected to the other end of the pipe 61.
- the ribbon unit 60 is of a cyclone type that generates a swirling force on the introduced gas to separate water droplets in the gas, and is formed in a bottomed cylindrical shape as shown in FIGS.
- the housing 6 5 is provided.
- One end (upstream end) of the housing 65 is opened, and a flange portion 65 A that can be fixed to the end plate 52 is formed in the opening.
- the ribbon portion 60 is hermetically fixed to the end plate 52 by fastening and fixing the flange portion 65 A with a bolt or the like via a sealing material (not shown). In this state fixed to the end plate 52, the inside of the housing 65 of the ribbon portion 60 communicates with the discharge flow paths 55, 55.
- the housing 65 is formed in a tapered shape that gradually narrows toward the other end (downstream end), and a ribbon plate 67 is fixed therein.
- the ribbon plate 67 has a swivel plate portion 67a that is spirally twisted along the axial direction, and both sides of the swivel plate portion 67a are on the inner peripheral surface of the housing 65. It is fixed.
- One end portion (upstream end portion) of the ribbon plate 6 7 is a separation plate portion 6 7 b made of a flat plate. This separation plate portion 6 7 b is arranged at the approximate center between the discharge channels 5 5 and 5 5 formed in the end plate 52 so as to divide the housing 65 into left and right objects in plan view. (See Figure 5).
- the hydrogen off gas sent from the discharge flow paths 55, 55 to the ribbon portion 60 is swirled by the separation plate portion 6 7b of the ribbon plate 6 7 in a spiral shape of the ribbon plate 6 7 It is distributed to each spiral flow path formed by the plate portion 6 7 a.
- the distribution of the hydrogen off-gas is made uniform, and the hydrogen off-gas having a speed in the direction intersecting the ribbon plate 67 is smoothly led to the downstream side.
- the hydrogen off-gas that has flowed into the spiral flow path becomes a swirling flow, and is introduced into the separation section 62 through the pipe 61 while guiding the moisture in the gas to the outside by the centrifugal force.
- the separation part 62 has a box-shaped case 70 whose other end side is connected to the side surface.
- the water guided to the outside by centrifugal force becomes water droplets on the inner surface of the case 70 and flows downward to form the case 7 0 is stored at the bottom.
- a pipe 7.2 constituting the circulation pipe 33 into which the hydrogen off-gas from which moisture has been separated is sent is connected. Further, an exhaust / drain valve 36 is provided between the separation part 62 and the end plate 52 to discharge water stored at the bottom of the housing 65 and discharge hydrogen off-gas.
- the pipe 7 2 is composed of a pipe member.
- a straight portion 7 2 a extending horizontally from the side surface of the housing 65 along the surface direction of the end plate 52, and the straight portion 7 2 Bend from the end of a to the upper side of the end plate 5 2 along the surface direction of the end plate 5 2 in a circular arc shape (turned part) 7 2 b, and the end of the end of the bent portion 7 2 b from the end of the end plate 5 2
- the linear portion 7 2 c that extends horizontally in the direction approaching the housing 65 along the direction, and is curved upward along the surface direction of the end plate 52 from the tip of the linear portion 7 2 c And a curved portion 7 2 d.
- a circulation pump 38 that returns hydrogen off-gas to the fuel cell stacks 51 and 51 is connected to a flange portion 72 e formed at the upper end of the curved portion 72 d at the lower portion thereof.
- the curved portion 7 2 b has a semicircular shape of 1800 degrees, and the pipe 7 2 is folded back at a central angle of 180 degrees that exceeds the central angle of 90 degrees.
- the housing 65 of the ribbon part 60 is formed by pressing a thin plate as a main component, and the ribbon plate 67 is also formed by pressing a thin plate. Further, the case 70 of the separation part 62 is also formed by pressing a thin plate as a main component.
- the gas-liquid separator 3 5 for separating off-gas gas-liquid discharged from the fuel cell stacks 5 1 and 5 1 is attached to the end plate 52.
- the exhaust heat of the fuel cell stacks 5 1 and 5 1 is effectively transmitted to the gas-liquid separator 35 via the end plate 52, and the gas-liquid separator 35 is good. Can be heated. Therefore, freezing of the water inside the gas-liquid separator 35 can be suppressed.
- the ribbon portion 60 of the gas-liquid separator 35 is disposed adjacent to the end plate 52, the distance between the fuel cell stack 5 1, 5 1 and the ribbon portion 60 can be reduced, and the fuel cell stack Since the hydrogen off-gas discharged from 5 1 and 5 1 can be swirled at a high flow rate, the separation performance is improved.
- the ribbon part 60 of the gas-liquid separator 35 and the separation part 62 are separated from each other and connected to each other via the pipe 61 so that the hydrogen off gas generated in the ribbon part 60 can be swirled.
- the distance that the flow can flow can be secured, and as a result, the gas and liquid can be separated well.
- the pipe 7 2 connecting the gas discharge port 7 1 of the gas-liquid separator 3 5 and the circulation pump 3 8 is provided with a curved portion 7 2 b that turns back at 90 ° exceeding 180 °. Therefore, when the off-gas containing moisture that could not be separated by the gas-liquid separator 3 5 is sent from the gas discharge port 7 1 to the circulation pump 3 8 via the pipe 7 2, the gas is further removed from the curved portion 7 2 b. Liquid separation will occur.
- the gas and liquid can be sufficiently separated if the pipe 72 is folded back at an angle exceeding 90 degrees without being folded back at 180 degrees.
- the pipe 7 2 that connects the gas outlet 7 1 of the gas-liquid separator 3 5 and the circulation pump 3 8 does not have a front-falling part from upstream to downstream, so the water separated in the middle of the pipe 7 2 Can be returned to the separation part 6 2 of the gas-liquid separator 35.
- the pipe 72 from the gas-liquid separator 35 is connected to the circulation pump 38 from the lower side, it is possible to further suppress moisture from entering the circulation pump 38. Furthermore, since the ribbon part 60 and the separation part 62 of the gas-liquid separator 35 are mainly composed of thin plates used for press forming, and these are connected by a pipe 61 made of a pipe member, the heat capacity From this point, the gas-liquid separator 35 can be warmed up immediately.
- the gas-liquid separator 80 includes a horizontally long box-shaped case 8 1, a gas introduction pipe 8 2 extending from a side surface on one end side in the longitudinal direction of the case 8 1, and the long side of the case 8 1.
- Water discharge pipe 8 4 that extends laterally from the opposite side of the direction and opens the water discharge port 8 3 at the front end in the horizontal direction, and gas discharge pipe 8 5 that extends from the upper surface of the case 8 1 And have.
- the case 8 1 has a substantially cylindrical body portion 8 7 and side plate portions 8 8 and 8 9 that close the openings on both sides of the body portion 8 7.
- the body portion 8 7 and the side plate portion 8 8 and 8 9 are formed by press-molding a thin plate.
- a gas introduction pipe 8 2 is connected to the side plate portion 8 8
- a water discharge pipe 8 4 is connected to the side plate portion 8 9
- a gas discharge pipe 8 5 is connected to the body portion 8 7.
- the body portion 87 has a plurality of reinforcing ribs 90 formed thereon.
- a flange portion 8 2 A is formed at the tip of the gas introduction pipe 8 2, and the gas-liquid separator 80 is fixed to the end plate 52 by bolting or the like at this flange portion 8 2 A.
- the gas introduction pipe 8 2 extends from the flange portion 8 2 A in the direction perpendicular to the surface direction of the end plate 52 and then bends along the surface direction of the end plate 52. This portion is the case 8 Connected to the top of 1.
- Case 8 1 includes a filter 9 2 that removes foreign substances from the hydrogen off-gas introduced through the gas introduction pipe 8 2, and a hydrogen off-gas that has passed through the filter 9 2. And an ion exchanger 93 for removing metal ions.
- the water droplets separated from the hydrogen off-gas by the gas-liquid separator 80 will flow down the bottom surface 95 of the case 8 1 along the surface of the case 8 1. Since the body portion 8 7 is formed from a thin plate having a constant thickness, the bottom portion 9 5 also has a constant thickness, and this bottom portion 9 5 is a front view as viewed from a direction perpendicular to the end plate 52. As described above, the gas introduction pipe 8 2 has a water discharge pipe 8 4, that is, an inclined shape inclined forward and downward toward the water discharge port 8 3 at the tip.
- a concave portion 96 that is recessed downward is formed extending along the inclination direction of the bottom portion 95.
- the recess 96 has a shape in which the lower edges of a pair of standing plates 9 7 and 9 7 projecting downward from the side closer to the end plate 52 and the side far from the end plate 52 are connected by a semi-cylindrical bottom plate 9 8.
- the bottom 9 5 of the case 8 1 has the recess 9 6 and the side bottom 1 0 0, 1 extending from the upper edge of the recess 9 6 to both sides.
- the inclination angle ⁇ 1 in the front view of the bottom plate portion 98 of the recess 96 is set to the first predetermined angle that does not reverse when the mounted vehicle is inclined in the normal range.
- the inclination angle ⁇ 2 in the front view of the side bottom portions 1 0 0, 1 0 1 is set to a second predetermined angle larger than the first predetermined angle. That is, the bottom 9 5 is a recess
- the inclination angle ⁇ 2 of the side bottom parts 1 0 0, 1 0 0 1 other than the recesses 9 6 is made larger than the inclination angle ⁇ 1 of 9 6.
- the side bottom portions 10 0, 1 0 1 on both sides are inclined so that the concave portion 96 side is lowered in a side view, and this inclination angle 0 is also the same as the bottom plate portion 9 8 of the concave portion 96. It is set to a predetermined angle.
- the water discharge pipe 8 4 has a flange portion 8 4 ⁇ formed at the position of the water discharge port 8 3, and the exhaust drain valve is connected through this flange portion 8 4 A.
- the hydrogen off-gas from which water has been removed by the gas-liquid separator 80 is discharged from the upper gas discharge pipe 85, and a flange portion 85A is formed at the upper end of the gas discharge pipe 85. Yes.
- a circulating pump 3 8 (see FIG. 1) for returning the hydrogen off-gas from which moisture has been removed to the fuel cell 10 is joined to the flange portion 85 A.
- the gas-liquid separator 80 that separates the gas-liquid of the hydrogen off-gas discharged from the fuel cell stacks 51 and 51 is connected to the end plate 5 2.
- the exhaust heat from the fuel cell stacks 51 and 51 is effectively transmitted to the gas-liquid separator 80 through the end plate 52, thereby improving the gas-liquid separator 80. Can be heated. Therefore, freezing of moisture inside the gas-liquid separator 80 can be suppressed.
- the gas-liquid separator 80 is provided with a water discharge port 83 in the lateral direction, the height of the gas-liquid separator 80 is limited due to the interference with the lower traction motor. However, the size of the case 8 1 that accumulates water can be secured. Accordingly, the interval between the opening operations of the exhaust discharge valve 36 can be lengthened.
- the bottom portion 9 5 as a whole is inclined forward and downward toward the water discharge port 8 3, even if the water discharge port 8 3 is provided in the lateral direction, water can be satisfactorily watered by the inclination of the bottom portion 9 5. It can be guided to the outlet 8 3.
- a concave portion 96 that is recessed downward is formed in the bottom portion 9 5 so as to extend along the inclined direction of the bottom portion 95, and the water discharge port 8 3 is provided on the extension, so that it has accumulated. Even when the amount of water is small, the height of the water can be secured by the recess 96, and the amount of hydrogen off-gas discharged when water is discharged from the water outlet 83 can be suppressed.
- the inclination angle ⁇ 2 of the side bottom portions 100 0, 100 1 other than the concave portion 9 6 in the bottom portion 9 5 is larger than the inclination angle 1 of the concave portion 9 6, it is stored in the concave portion 9 6. Even when the vehicle is inclined, it is possible to maintain the inclined state of the bottom portion 95 as a whole at the side bottom portions 1 0 0, 1 0 1 while securing the water capacity. Further, since the bottom plate portion 98 of the recess 96 has a semi-cylindrical shape, it is possible to secure the water capacity of the recess 96 while maintaining workability.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/440,164 US20100183939A1 (en) | 2006-09-06 | 2007-09-05 | Fuel cell system |
DE112007002078T DE112007002078T5 (de) | 2006-09-06 | 2007-09-05 | Brennstoffzellensystem |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-242015 | 2006-09-06 | ||
JP2006242015A JP2008066087A (ja) | 2006-09-06 | 2006-09-06 | 燃料電池システム |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008029948A1 true WO2008029948A1 (fr) | 2008-03-13 |
Family
ID=39157365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/067687 WO2008029948A1 (fr) | 2006-09-06 | 2007-09-05 | Système de pile à combustible |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100183939A1 (ja) |
JP (1) | JP2008066087A (ja) |
KR (1) | KR20090042296A (ja) |
CN (1) | CN101512820A (ja) |
DE (1) | DE112007002078T5 (ja) |
WO (1) | WO2008029948A1 (ja) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5217649B2 (ja) * | 2008-06-06 | 2013-06-19 | トヨタ自動車株式会社 | 燃料電池ユニット、および、車両 |
JP5332324B2 (ja) * | 2008-06-06 | 2013-11-06 | トヨタ自動車株式会社 | 燃料電池システム |
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Also Published As
Publication number | Publication date |
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CN101512820A (zh) | 2009-08-19 |
KR20090042296A (ko) | 2009-04-29 |
JP2008066087A (ja) | 2008-03-21 |
DE112007002078T5 (de) | 2009-11-12 |
US20100183939A1 (en) | 2010-07-22 |
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