Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
  • B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
  • B60K6/32—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the fuel cells
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L50/00—Electric propulsion with power supplied within the vehicle
  • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
  • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
  • B60L50/72—Constructional details of fuel cells specially adapted for electric vehicles
• • 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
  • H01M8/0204—Non-porous and characterised by the material
  • H01M8/0206—Metals or alloys
• • 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
  • H01M8/0204—Non-porous and characterised by the material
  • H01M8/0223—Composites
  • H01M8/0228—Composites in the form of layered or coated products
• • 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
  • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2200/00—Type of vehicle
  • B60Y2200/90—Vehicles comprising electric prime movers
  • B60Y2200/91—Electric vehicles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2200/00—Type of vehicle
  • B60Y2200/90—Vehicles comprising electric prime movers
  • B60Y2200/92—Hybrid vehicles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2400/00—Special features of vehicle units
  • B60Y2400/20—Energy converters
  • B60Y2400/202—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
  • H01M8/10—Fuel cells with solid electrolytes
  • H01M2008/1095—Fuel cells with polymeric electrolytes
• • 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
• • 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
  • H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form

Definitions

• the invention relates to a fuel cell comprising at least one membrane electrode assembly and at least one bipolar plate comprising a separator plate.
• a fuel cell is a galvanic cell, which is the chemical
• a fuel cell is therefore an electrochemical energy converter.
• fuel cells in particular hydrogen (H2) and oxygen (02) in water (H20), electrical energy and heat are converted.
• fuel cells are also known which operate with methanol or methane or with mixtures thereof.
• proton exchange membrane PEM
• PEM proton exchange membrane
• Proton exchange membrane fuel cells further include an anode and a cathode.
• the fuel is supplied to the anode of the fuel cell and catalytically oxidized to protons with release of electrons.
• the protons pass through the membrane to the cathode.
• the emitted electrons are discharged from the fuel cell and flow through an external circuit to the cathode.
• the oxidizer is supplied to the cathode of the fuel cell and it reacts by absorbing the electrons from the external circuit and protons that have passed through the membrane to the cathode to water. The resulting water is discharged from the fuel cell.
• a voltage is applied between the anode and the cathode of the fuel cell.
• a plurality of fuel cells can be arranged mechanically one behind the other to form a fuel cell stack and electrically connected in series.
• the flow fields have, for example, channel-like structures for distributing the fuel and the oxidizing agent.
• the bipolar plates can also structures for
• DE 10 2013 226 815 A1 discloses a fuel cell stack which comprises a plurality of fuel cells each having a membrane-electrode unit.
• the membrane-electrode unit is surrounded by two separator plates, which are designed as bipolar plates.
• a fuel cell with a bipolar plate which is composed of two plate halves.
• each of the two plate halves has a distributor structure, which are provided for distributing the reaction gases and a cooling liquid.
• the bipolar plate in this case has a meandering channel, which is formed for example as a groove.
• the meandering channel serves to introduce hydrogen or oxygen into the fuel cell.
• DE 10 2013 223 817 A1 discloses a fuel cell stack with a plurality of fuel cells.
• Each fuel cell comprises a membrane-electrode unit which is surrounded by media distribution units.
• a fuel cell is known which has gas diffusion layers for distributing the fuel and the air.
• a metallic grid is arranged between the gas diffusion layers and a separator plate.
• a fuel cell which comprises a metallic grid for the passage of a gas.
• the grid has large and small openings, which are arranged alternately.
• a fuel cell which comprises at least one membrane-electrode unit and at least one bipolar plate.
• the bipolar plate comprises a separator plate.
• the membrane-electrode assembly includes an anode and a cathode and a membrane disposed therebetween.
• a media space in the bipolar plate is formed between the membrane-electrode unit and the separator plate, which is provided for supplying a fuel to the anode or for supplying atmospheric oxygen to the cathode.
• the bipolar plate comprises at least one structural part, which has a base body, in which recesses are introduced, and wings which protrude away from the sides of the recesses and extend as far as the at least one membrane-electrode unit.
• the main body of the structural part is formed, for example, as a flat sheet.
• the base body of the at least one structural part abuts against the separator plate.
• the bipolar plate additionally comprises at least one structural element, which also has a
• Base body are introduced in the recesses, and wings, which protrude away from the sides of the recesses, having.
• Structural element through recesses in the structural part, and wings of the structural part protrude through recesses in the structural element.
• the main body of the structural element bears against the main body of the structural part.
• the main body of the structural element is formed, for example, as a flat sheet.
• the main body of the structural element is spaced from the main body of the structural part.
• the recesses in the main body of the structural part and in the main body of the structural element are formed rectangular.
• Each of the recesses in the main body of the structural part and in the main body of the structural element comprises two opposite longitudinal sides and two opposite transverse sides. The long sides run at right angles to the transverse sides.
• the wings of the structural part and the wings of the structural element protrude from opposite longitudinal sides of the recesses in the main body of the structural part and the recesses in the main body of the
• At least one transverse side of the recesses in the main body of the structural part and the recesses in the main body of the structural element projects away from the main body at least one fin.
• those of the main body of the structural part and of the main body of the structural element distant ends of the wings of the structural part and the structural element on a deflection.
• a fuel cell according to the invention advantageously finds use in an electric vehicle (EV), in a hybrid vehicle (HEV) or in a plug-in hybrid vehicle (PHEV).
• EV electric vehicle
• HEV hybrid vehicle
• PHEV plug-in hybrid vehicle
• the supply of a fuel to the anode and the supply of atmospheric oxygen to the cathode are improved by the respective media space. Also, the removal of the resulting product water from the media room is improved.
• the invention can also be used as a flow field in the cooling channel.
• the electrical contacting of the bipolar plate with the electrodes of the membrane-electrode unit is simplified. The production of the bipolar plate is relatively easy by punching the recesses and bending the resulting wings feasible.
• FIG. 1 shows a schematic representation of a fuel cell
• FIG. 2 shows a schematic representation of a fuel cell stack
• FIG 3 shows a section through a fuel cell according to a first
• Figure 4 is a plan view of a structural part according to a first variant of
• FIG. 5 shows a frontal view of the structural part from FIG. 4,
• Figure 6 is a plan view of a structural part according to a second variant of
• FIG. 7 shows a front view of the structural part from FIG. 6,
• FIG. 8 shows a front view of a structural part according to a third variant of the fuel cell from FIG. 3, FIG.
• FIG. 9 shows a front view of a structural part according to a fourth variant of the fuel cell from FIG. 3
• FIG. 10 shows a section through a fuel cell according to a second one
• FIG. 11 shows a plan view of a structural part of the fuel cell from FIG. 10
• FIG. 12 shows a frontal view of the structural part from FIG. 11,
• FIG. 13 shows a section through a fuel cell according to a third
• FIG. 14 shows a plan view of a structural part of the fuel cell from FIG. 13, FIG.
• FIG. 15 shows a frontal view of the structural part from FIG. 14,
• FIG. 16 shows a section through a fuel cell according to a fourth
• FIG. 17 shows a section through a fuel cell according to a fifth
• the fuel cell 2 comprises a negative terminal 11 and a positive terminal 12.
• a voltage supplied by the fuel cell 2 can be tapped off via the terminals 11, 12.
• an electric current flows between the two terminals 11, 12 via an external circuit.
• the fuel cell 2 has a first connection point 31, which serves to supply a fuel, in the present case hydrogen.
• the fuel cell 2 also has a second connection point 32, which serves to supply an oxidizing agent, in the present case atmospheric oxygen.
• the fuel cell 2 also has a third connection point 33, which serves for the derivation of originated water and the residual air.
• the fuel cell 2 has an anode 21, a cathode 22 and a membrane 18.
• the membrane 18 is arranged between the anode 21 and the cathode 22.
• a first bipolar plate 40 is arranged, which is connected to the first connection point 31.
• a second bipolar plate 40 is arranged, which is connected to the second connection point 32 and to the third connection point 33.
• the first bipolar plate 40 and the second bipolar plate 40 are electrically conductive and made of graphite or metal, for example.
• Gas diffusion layer 30 is provided.
• the first gas diffusion layer 30 is electrically conductive and made, for example, from a porous carbon paper.
• the first gas diffusion layer 30 ensures a uniform distribution of the fuel supplied via the first bipolar plate 40 to the anode 21.
• a second gas diffusion layer 30 is provided between the cathode 22 and the second bipolar plate 40.
• the second gas diffusion layer 30 is electrically conductive and made, for example, from a porous carbon paper.
• the second gas diffusion layer 30 ensures uniform distribution of the oxidant supplied via the second bipolar plate 40 to the cathode 22.
• Gas diffusion layers 30 together form a membrane-electrode unit 10, which is arranged centrally within the fuel cell 2.
• Gas diffusion layer 30 and the second gas diffusion layer 30 are optional and may be omitted.
• a first media space 41 is formed, which adjoins the membrane electrode assembly 10. Through the first media space 41, the fuel, which is supplied via the first connection point 31 of the fuel cell 2, is passed on to the anode 21 on.
• a second media space 42 is formed, which adjoins the membrane-electrode unit 10. Through the second media space 42, the oxidizing agent, via the second connection point 32 of the
• Fuel cell 2 is supplied to the cathode 22 is passed on. Through the second media space 42, the water produced during operation of the fuel cell 2 is also discharged from the fuel cell 2 via the third connection point 33 together with the unused residual air.
• the anode 21, the first bipolar plate 40, and the first gas diffusion layer 30 interposed therebetween are electrically connected to the negative terminal 11 of FIG.
• Fuel cell 2 connected.
• the cathode 22, the second bipolar plate 40, and the second gas diffusion layer 30 interposed therebetween are electrically connected to the positive terminal 12 of the fuel cell 2.
• FIG. 2 schematically shows a fuel cell stack 5.
• Fuel cell stack 5 comprises a plurality of alternately arranged membrane electrode assemblies 10 and bipolar plates 40.
• electrode units 10 are constructed as shown in FIG. 1 and each comprise an anode 21, a cathode 22, a diaphragm 18 arranged therebetween and two gas diffusion layers 30.
• the bipolar plates 40 which are each arranged between two membrane-electrode assemblies 10, each comprise a centrally arranged separator plate 50.
• the bipolar plates 40 furthermore each include a first structural part 51, which faces the first media space 41, and a second structural part 52, which faces the second media room 42.
• the first structural part 51 can also be arranged within the first media room 41
• the second structural part 52 can also be arranged within the second media room 42.
• the bipolar plates 40 furthermore have structures, not shown here, for example in the form of a coolant space, for the passage of a coolant through the fuel cell 2. This is a discharge of the operation of the
• Fuel cell 2 allows.
• FIG. 3 shows a section through a fuel cell 2 according to a first embodiment.
• the separator plate 50 is designed as a flat sheet. On the separator plate 50 is formed as a flat sheet body 60 of the first structural part 51 at. Between the main body 60 of the first structural part 51 and the membrane-electrode unit 10 is the first
• the first structural member 51 may be made of a metal such as iron, stainless steel or titanium.
• the main body 60 of the first structural part 51 has a thickness of at most 150 ⁇ , preferably at most 75 ⁇ , more preferably at most 25 ⁇ .
• the first media space 41 may have a height of at most 1 mm, preferably at most 700 ⁇ , more preferably at most 350 ⁇ .
• the first structural part 51 and the separator plate 50 are mechanically connected to each other. Brazing, soft soldering, diffusion joining and welding, in particular laser welding, but also other welding methods are suitable as joining technique.
• FIG. 4 shows a top view of the first structural part 51 according to a first variant of the fuel cell 2 from FIG. 3.
• Several recesses 65 are introduced into the main body 60 of the first structural part 51, in particular punched.
• the recesses 65 are presently rectangular in shape and each comprise two opposite longitudinal sides 70 and two
• the recesses 65 may in particular also be square.
• the longitudinal sides 70 of the recesses 65 run parallel to the flow direction S, and the transverse sides 72 of the recesses 65 extend at right angles to the flow direction S.
• the recesses 65 may also be arranged such that the
• Longitudinal sides 70 of the recesses 65 extend at right angles to the flow direction S, and the transverse sides 72 of the recesses 65 parallel to the
• the recesses 65 may also have any other shapes and be formed, for example, triangular and hexagonal. Also, sides 70, 72 of the recesses 65 inclined to each other, so not necessarily parallel or perpendicular.
• the recesses 65 are arranged in rows. Adjacent recesses 65 in a row are separated by webs 66. According to the first variant shown here, the recesses 65 in the
• the length of the longitudinal sides 70 corresponds at most to the length of the bipolar plate 40, preferably short pieces are possible with a few millimeters in length.
• the distance between two rows of recesses 65 should be as small as possible, preferably at most 1 mm, more preferably at most 500 ⁇ m.
• the width of the webs 66 is also selected as narrow as possible, preferably at most 1 mm, more preferably at most 500 ⁇ .
• FIG. 5 shows a frontal view of the first structural part 51 of FIG. 4.
• the first wings 61 and the second wings 62 project away and extend to the membrane-electrode unit 10.
• a wing angle A is formed between the wings 61, 62 and the recesses 65 in the base body 60 in each case.
• Base body 60 of the first structural part 51 remote ends of the wings 61, 62 each have a deflection 69.
• the deflection 69 may be a
• the width of the transverse sides 72 is predetermined by the height of the first media space 41 and the wing angle A and by the embodiment of the deflection 69.
• the wing angle A is in a range between 70 ° and 90 °, preferably between 80 ° and 90 °.
• FIG. 6 shows a plan view of the first structural part 51 according to a second variant of the fuel cell 2 from FIG. 3, and FIG. 7 shows a frontal view of the first structural part 51 from FIG. 6.
• the recesses 65 are as in FIG. 4 and FIG first variant arranged in rows, and adjacent recesses 65 in a row are separated by webs 66.
• the recesses 65 are present in the successive rows present about one third of the width of the
• Transverse sides 72 offset from each other. Furthermore, irregular displacements of the recesses 65 in successive rows are conceivable.
• FIG. 8 shows a frontal view of the first structural part 51 according to a third variant of the fuel cell 2 from FIG. 3.
• the separator plate 50 is likewise designed as a flat sheet metal. Notwithstanding the first and second variants, the base body 60 of the first structural part 51 is arranged at a distance from the separator plate 50 and is located, for example, in the middle of the first media space 41.
• the first wings 61 protrude to the membrane-electrode unit 10.
• FIG. 9 shows a front view of the first structural part 51 according to a fourth variant of the fuel cell 2 from FIG. 3.
• the main body 60 of the first structural part 51 is arranged at a distance from the separator plate 50 and is located, for example, in the middle of the first media space 41.
• the recesses 65 are arranged in the base body 60 in rows.
• the wings 61, 62 extend to the membrane electrode assembly 10. From the longitudinal sides 70 of the recesses 65 in the adjacent rows, the wings 61, 62 protrude to the
• FIG. 10 shows a section through a fuel cell 2 according to a second embodiment. From a transverse side 72 of the recesses 65 a respective fin 63 protrudes from the base body 60 and extends into the first Media room 41 into it. The fin 63 runs at right angles to the
• a fin angle B is formed between the fins 63 and the recesses 65 in the base body 60.
• the fin angle B is in a range between 30 ° and 90 °, preferably between 45 ° and 90 °.
• FIG. 11 shows a plan view of the first structural part 51 of the fuel cell 2 from FIG. 10, and FIG. 12 shows a front view of the first structural part 51 from FIG. 11.
• the maximum length of the fin 63 is at most 0.7 times the height of the first media room 41. preferably at most 0.5 times the height of the first media space 41, more preferably at most 0.3 times the height of the first media space 41st
• FIG. 13 shows a section through a fuel cell 2 according to a third embodiment.
• the main body 60 of the first structural part 51 is arranged at a distance from the separator plate 50 and is located, for example, in the middle of the first media room 41. From longitudinal sides 70 of the recesses 65, the first wings 61 protrude to the membrane-electrode unit 10, and from the respective ones opposite longitudinal sides 70 of the recesses 65 protrude the second wings 62 to the separator 50th
• a fin 63 projects away from the main body 60 in the direction of the membrane-electrode unit 10.
• Direction of flow S is located downstream, in each case a fin 63 projects away from the base body 60 in the direction of the separator plate 50.
• the fins 63 By means of the fins 63, the flow of the fuel can be deflected in a targeted manner in the direction of the membrane electrode unit 10.
• FIG. 14 shows a plan view of the first structural part 51 of the fuel cell 2 from FIG. 13, and FIG. 15 shows a front view of the first structural part 51 from FIG. 14.
• the maximum length of the fins 63 is at most 0.3 times the height of the first media space 41.
• the fins 63 are each made in one piece. Thereby are the
• the fins 63 are each made in two parts and each comprise a first sub-fin 63a and a second sub-fin 63b.
• the contact surfaces of the wings 61, 62 are enlarged with the membrane electrode assembly 10 and the separator 50 in comparison to the Republicslö on the left side.
• FIG. 16 shows a section through a fuel cell 2 according to a fourth embodiment. From the longitudinal sides 70 of the recesses 65 in the base body 60 of the first structural part 51, first wings 61 protrude to the
• the bipolar plate 40 additionally comprises a structural element 55, which has a main body 60 into which recesses 65 are likewise introduced. From the longitudinal sides 70 of the recesses 65 in the base body 60 of the structural member 55 also protrude first wing 61 to the membrane electrode assembly 10, and second wings 62 protrude to the separator plate 50th Der
• the base body 60 of the structural element 55 rests against the base body 60 of the first structural part 51 in the present case.
• FIG. 17 shows a section through a fuel cell 2 according to a fifth embodiment, which is formed similarly to the fuel cell 2 according to the fourth embodiment shown in FIG. Unlike the fuel cell 2 according to the fourth embodiment, in the fuel cell 2 according to a fifth embodiment, the main body 60 of the
• Structured element 55 spaced from the base body 60 of the first structural member 51.
• the fuel cell 2 results in an increase in the number of contact points and the contact surfaces to the membrane electrode assembly 10 and to the separator 50. Further, the distances between the rows of contacts can be reduced and it still remains a closed current path of Membrane electrode unit 10 to the separator 50 consist. As a result, a larger current carrying capacity is achieved, whereby the main body 60 of the structural parts 51, 52 and the
• Structure element 55 may have a lower material thickness.

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• 2016
  • 2016-09-21 DE DE102016218062.2A patent/DE102016218062A1/de active Pending
• 2017
  • 2017-07-25 CN CN201780058233.9A patent/CN109716567B/zh active Active
  • 2017-07-25 US US16/334,184 patent/US10886542B2/en active Active
  • 2017-07-25 EP EP17751298.5A patent/EP3516719A1/de not_active Withdrawn
  • 2017-07-25 JP JP2019511917A patent/JP6825084B2/ja active Active
  • 2017-07-25 KR KR1020197011157A patent/KR102355788B1/ko active IP Right Grant
  • 2017-07-25 WO PCT/EP2017/068730 patent/WO2018054580A1/de unknown

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