WO2021084463A1

WO2021084463A1 - Fuel cell and fuel supply system

Info

Publication number: WO2021084463A1
Application number: PCT/IB2020/060146
Authority: WO
Inventors: 高椋庄吾; 上原茂高; 同卜
Original assignee: ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング
Priority date: 2019-11-01
Filing date: 2020-10-29
Publication date: 2021-05-06
Also published as: JP2021072250A

Abstract

The present invention enhances sealing reliability for a fuel gas. Provided is a fuel cell (100) that generates power by subjecting a fuel gas to a chemical reaction, said fuel cell (100) comprising a seal (7, 15) for sealing the fuel gas inside the fuel cell (100), wherein the seal (7, 15) is configured to include a self-healing elastomer material.

Description

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[Document name] Statement

[Title of Invention] Fuel Cell and Fuel Supply System [Technical Field]

[0 0 0 1] The present invention relates to a fuel cell and a fuel supply system.

[Background technology]

[0 0 0 2] A polymer electrolyte fuel cell generates electricity by chemically reacting hydrogen gas supplied as fuel gas with oxygen gas in the air. Generally, a polymer electrolyte fuel cell has a structure in which a membrane electrode assembly that undergoes the above chemical reaction is sandwiched between a pair of separators.

[0 0 0 3] In order to prevent gas from leaking from the fuel cell to the outside, the fuel cell is provided with a seal material. For example, a bead that is a convex protrusion is provided on the surface of the separate assembly, and this bead comes into contact with a subgasquette provided on the outer circumference of the membrane electrode assembly to seal the periphery of the membrane electrode assembly. Stop. A resin seal material is placed between the bead and the sub-gasket to improve the sealing performance (see Patent Document 1).

[Prior Art Document]

[Patent Document]

[0 0 0 4]

[Patent Document 1] US Pat. No. 2,0 1 9 0 7 4 5 2 4 [Outline of the Invention]

[Issues that the invention is about to make a decision]

[0 0 0 5] The bead, which is formed by press molding or the like and a part of the metal separate-evening body protrudes, has a large reaction force. A large clamper is required to tangentially seal such a bead on the sub-gasket, and the bead and sub-gasket are required. \\ 020 21/084463 卩 (: 17132020/060146)

The load on the seal between the two will increase. If there are defects such as voids and cracks inside the seal, the defects may grow and gas leakage may occur depending on the size of the load.

[000 6] An object of the present invention is to improve the reliability of fuel gas sealing.

[Means for determining issues]

[0 0 0 7] According to one aspect of the present invention, the fuel cell (100) generates power by chemically reacting the fuel gas, and the fuel gas is sealed in the fuel cell (100). A fuel cell (100) is provided with a shut-off seal (7, 15), which is composed of a self-healing elastomer material. Provided.

[000 8] According to another aspect of the present invention, a storage device (1) for storing the fuel gas used for power generation of the fuel cell (100) and the fuel gas in the storage device (1). A filling device (Mi) for filling the fuel gas and a seal (V 1 to V 7) provided in the storage device (1) or the filling device (Mi) for sealing the fuel gas are provided. Seals (V 1-7) are provided with a fuel supply system ((:)) composed of self-healing elastomer materials.

【Effect of the invention】

[0 0 0 9] According to the present invention, the reliability of fuel gas sealing can be improved.

[Simple explanation of drawings]

[0010]

FIG. 1 is a cross-sectional view showing the configuration of a fuel cell of one embodiment.

FIG. 2 is an exploded perspective view schematically showing a cell configuration.

FIG. 3 is a plan view showing the surface of the separation-evening.

FIG. 4 is an enlarged view within the broken line frame of FIG.

FIG. 5 is an enlarged cross-sectional view showing a seal having a multi-layer structure. \\ 020 21/084463 卩 (: 17132020/060146)

3

FIG. 6 is a schematic diagram showing a configuration of a fuel supply system of one embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the fuel cell and fuel supply system of the present invention will be described with reference to the drawings. The configuration described below is an example (representative example) of the present invention, and is not limited thereto.

[0012]

(Fuel cell) FIG. 1 shows the configuration of the fuel cell 100 of the present embodiment. The fuel cell of the present embodiment is mounted on a moving body such as a vehicle, and supplies driving power to the moving body by chemically reacting fuel gas to generate electricity. The present invention can also be applied to the fuel cell of the above.

[0 0 1 3] As shown in FIG. 1, the fuel cell 100 has a plurality of stacked cells 10 and a pair of collector pres arranged on both sides of each cell 10 in the stacking direction. It has a stack of 1 1, a pair of insulator pre-stacks 1 2 and a pair of end blurs-stack 1 3. In addition, the fuel cell 100 is provided with a gas pipe 1 4 attached to at least one end plate 1 3. The gas pipe 1 4 communicates with a manifold (not shown).

[0 0 1 4] Cell 1 0, current collector plate 1 1 on the gas pipe 1 4 side, insulator plate 1 2 and end plate 1 3 communicate with the gas pipe 1 4 and stack in cell 10 There are four penetrations 1 to 4 that penetrate the. Fuel gas is supplied and discharged through these through holes 1 to 4.

[0 0 1 5] The fuel cell 1 0 0 has a seal 1 between each member of the collector plate 1 1, the insulator plate 1 2, the end plate 1 3 and the gas pipe 1 4. Equipped with 5. The seal 15 is, for example, a 0 ring that surrounds the outside of the through holes 1 to 4, and is composed of an elastomer material. It is possible to suppress gas leakage from the penetrating materials 1 to 4 by sealing the outer circumference of the penetrating materials 1 to 4 with the seal 1 5 tangentially worming on each adjacent material. In addition, seal 15 is an example. For example, it may be composed of only an elastomer material, or may be composed of an elastomer material and a reinforcing material for maintaining the shape of the seal 15.

[0 0 1 6] A pair of end presses 1 3 are tightened by tightening members such as bolts and nuts, and the fuel cell 1 0 0 is sandwiched between end presses 1 3 and is a stack of each member of the fuel cell 1 0 0. Tightening force acts in the direction. By this tightening force, the stack structure of each member between the end presses 13 is fixed, and the fuel gas is sealed in the fuel cell 100.

[0 0 1 7] Figure 2 schematically shows the configuration of cell 10. As shown in Figure 2, cell 10 consists of a membrane electrode assembly (MEA) 3, a pair of separators 4 located on either side of MEA 3, and a sub-gasket 5 that surrounds the outer periphery of MEA 3. And prepare. M E A 3 includes an electrolyte membrane 1 and a pair of electrodes 2. The pair of electrodes 2 sandwich the electrolyte membrane 1.

[0 0 1 8] The electrolyte membrane 1 is an ionic conductive polymer electrolyte membrane. Polymer electrolytes that can be used in the electrolyte membrane 1 include, for example, perfluo □ sulfonic acid polymers such as Nafion (registered trademark) and Aquivion (registered trademark); Polypolymer-; Examples thereof include aliphatic polymers such as polyvinyl sulfonic acid and polyvinyl phosphate.

[0 0 1 9] From the viewpoint of improving durability, the electrolyte membrane 1 can be a composite membrane in which a porous base material 1a is impregnated with a polymer electrolyte. The porous base material 1a is not particularly limited as long as it has voids capable of supporting the polymer electrolyte, and a porous, woven fabric, non-woven fabric, fibrill or the like film can be used. The material of the porous base material 1a is not particularly limited, but the polymer electrolyte as described above can be used from the viewpoint of enhancing ionic conductivity. Among them, polytetrafluo □ ethylene, polytetrafluo □ ethylene ku □ □ trifluo □ ethylene copolymer, and polychromo □ trifluo □ fluorine-based polymers such as ethylene are excellent in strength and shape stability.

[0 0 2 0] \\ 0 2021/084463 卩 (: 17132020/060146)

5 Of the pair of electrodes 2, one electrode 2 is an electrode and is also called a fuel electrode. The other electrode 2 is a cascade, which is also called an air electrode. As fuel gas, hydrogen gas is supplied to the anode and air containing oxygen gas is supplied to the cathode. In Figure 2, the black arrows represent hydrogen gas and the white arrows represent air.

[0 0 2 1] In the node, a reaction occurs in which ^{hydrogen gas (1 to} 1 ₂ ) produces an electron (61) and a plant (1 ^to 1 ^+). The electrons move to the cassette via an external circuit (not shown). This movement of electrons generates an electric current in the external circuit. Protons move to the cathode via the electrolyte membrane 1.

[0 0 2 2] In the cascade, oxygen ions (0 _{2 —} ) are _{generated from oxygen gas (〇 2) by electrons moving from an external circuit.} ^{Oxygen ions combine with protons (2 1 to} 1 ⁺ ) that have moved from the electrolyte membrane 1 to become water (1 ^to 1 ₂ 〇).

[0 0 2 3] Electrode 2 includes a catalyst layer 21. The electrode 2 of the present embodiment includes a gas diffusion layer 2 2 in order to improve the diffusivity of the fuel gas. The gas diffusion layer 2 2 is arranged on the separation-evening side of the catalyst layer 21.

[0 0 2 4] The catalyst layer 2 1 promotes the reaction of hydrogen gas and oxygen gas by the catalyst. The catalyst layer 21 contains a catalyst, a carrier that carries a catalyst, and an ionomer that coats them. Examples of the hornworm medium include metals such as platinum (se), ruthenium (Ru), iridium (I "), rhodium (R h), paradium (), and tungsten (\ 1 \ 〇), and mixtures of these metals. Examples thereof include alloys. Among them, platinum, a mixture containing platinum, an alloy and the like are preferable from the viewpoints of catalytic activity, toxicity resistance to carbon monoxide, heat resistance and the like.

[0 0 2 5] Examples of the carrier include conductive porous metal compounds having pores such as mesoporous carbon and seblack. Mesoporous carbon is preferable from the viewpoint of good dispersibility, large surface area, and small particle growth at high temperature even when the amount of catalyst supported is large. \\ 0 2021/084463 卩 (: 17132020/060146)

6 As the ionomer, a polymer electrolyte having the same ion conductivity as that of the electrolyte membrane 1 can be used.

[0 0 2 6] The gas diffusion layer 2 2 includes the ability to uniformly diffuse the fuel gas supplied to cell 10 over the entire surface of the catalyst layer 21. The gas diffusion layer 2 2 can be formed by placing a sheet for the gas diffusion layer on its own as the outermost layer of 1 \ / 1 Mihachi 3. Examples of the gas spreading layer sheet include a force having conductivity, gas permeability and gas diffusivity-a porous fiber such as a bon fiber, and a metal such as a foamed metal and an expanded metal. Examples include metal materials.

[0 0 2 7] The sub-gasket 5 is a film or plate that surrounds the outer periphery of 1 \ / 1 Mi 8 3 and functions as a support for 1 \ / 1 Mi 8 3. As the material of the sub-gasket 5, a tree having low conductivity can be used. The material for the tree month is not particularly limited, and examples thereof include polyphenylene sulfide (5), polypropylene containing glass (10), polyester (5), silicone tree month, and fluorine-based tree month.

[0 0 2 8]

(Separate-Evening) Separator 4 is also called Paibo Love Rate. As the material of the separator 4, an conductive material such as force-bon or stainless steel is used.

[0 0 2 9] Figure 3 shows the surface of Separation-4. The separation-4 of the present embodiment has a surface provided with _{recesses 4 3.} Separation-When the surface of the evening 4 where the recesses 4 ₃ are provided faces IV! Mihachi 3, a flow path 20 is provided between the separator 4 and 1 \ / 1 Mihachi 3. Channel 20 is not only a fuel gas supply channel, but also a water discharge channel generated by a chemical reaction during power generation.

[0 0 3 0] The separation-4 of the present embodiment is provided with a plurality of ribs 4 on its surface. These ribs 4 provide recesses 4 3 on the surface of the separate-evening 4. If the surface of the separator 4 can be provided with the recess 4 3, the surface of the separator 4 may be provided with a groove, or both the rib 4 and the groove may be provided. One separate \\ 0 2021/084463 卩 (: 17132020/060146)

7 The recess 4 3 of the evening 4 communicates from the through hole 1 to the through hole 2, and the other separation-the recess 4 3 of the evening 4 is the through hole.

Communicate from 3 to 4 through.

[0 0 3 1] As shown in Fig. 3, the four penetrations 1 to 4 penetrate each of the four corners of Separation-Evening 4. Through hole 1 is a hydrogen gas supply port, and through hole 2 is a hydrogen gas discharge port. The through hole 3 is an air supply port, and the through hole 4 is an air outlet. In one separation-evening 4, through-holes 1 and 2 communicate with the flow path 20 and in the other separate-evening 4, through-holes 3 and 4 communicate with the flow path 20.

[0 0 3 2]

(Bead) Beads 6 1 to 63 are provided on the surface of the separate evening 4. Beads 6 1 to 6 3 are convex protrusions.

IV! Protrudes to the 3rd side of Mihachi. Beads 6 1 to 6 3 seal the circumference of 1 \ / 1 Mihachi 3 by tangentializing the sub-gasket 5.

[0 0 3 3] The bead 6 1 orbits the outer peripheral edge 5 of the separator 4. The bead 6 2 surrounds the flow path 20 and the outside of the through holes 1 and 2 inside the bead 6 1. The bead 6 3 surrounds the outside of the through holes 3 and 4 which do not communicate with the flow path 20. These beads 6 1 to 6 3 can be formed, for example, by press-molding the body of the separator 4.

[0 0 3 4]

(Elastomer layer) Fig. 4 is an enlarged view within the broken line frame of Fig. 1. Fig. 4 corresponds to the cross section on the I 1-1 I line in Fig. 3. As shown in Fig. 4, the fuel cell 100 is provided between the beads 6 1 and 6 2 and the sub-gasket 5. Equipped with an elastomer layer 7. Although not shown, an elastomer layer 7 is similarly provided between the bead 6 3 and the sub-gasket 5.

[0 0 3 5] \\ 0 2021/084463 卩 (: 17132020/060146)

8 The elastomer layer 7 tangentially punctures the bead 6 1 of the separator 4 and also tangentially worms the sub-gasket 5, and seals the periphery of 1 \ / 1 Mihachi 3. That is, the elastomer layer 7 is a seal that seals the fuel gas in the cell 10. Depending on the surface roughness of the beads 6 1 to 6 3, a gap may occur between the beads 6 1 to 6 3 and the sub-gasket 5, and fuel gas may leak, especially low molecular weight hydrogen gas. However, the elastomer layer 7 can fill this gap and suppress gas leakage.

[0 0 3 6] The elastomer layer 7 can be formed by printing, coating, injection molding, or the like using an ink for an elastomer layer containing an elastomer material or the like. Of these, printing such as screen printing is preferable from the viewpoint of ease of pattern forming.

[0 0 3 7] The elastomer layer 7 preferably has a multi-layer structure. This makes it possible to make the properties such as elasticity of each layer different. Further, by laminating a plurality of layers, it becomes easy to form an elastomer layer 7 having a certain thickness or more. FIG. 5 shows an example of an elastomer layer 7 having a three-layer structure. As shown in FIG. 5, the elastomer layer 7 has a first layer 71, a second layer 7 2 and a third layer 7 3 laminated on the tip of the bead 61 in this order.

[0 0 3 8] The types or thicknesses of the elastomers of the first layer 7 1 to the third layer 7 3 may be the same or different. For example, the larger the thickness, the smaller the spring constant and the smaller the reaction force of the elastomer layer 7. The elastomer layer 7, which has a small reaction force, can be sufficiently sealed with a small clamper. On the other hand, the larger the reaction force, the longer the sealing property is likely to last, and the higher the reliability of sealing. Therefore, by adjusting the type or thickness of the elastomer material so that the spring constant of the first layer 71 is large and the spring constant of the third layer 73 is small, sealing is easy and the sealing reliability is reliable. A highly potent elastomer layer 7 can be obtained.

[0 0 3 9] The elastomer layer 7 having a multi-layer structure can be formed by repeating printing or coating a plurality of times. Among various printing methods, even in screen printing, which can form a thick film, the thickness of the film that can be formed in one printing is 10 \\ 0 2021/084463 卩 (: 17132020/060146)

9

An elastomer layer 7 having a thickness of the above thickness can also be formed.

[0 0 4 0] For example, even if the upper limit of the film thickness that can be formed by one printing is 84, the thickness is 5 0 4 1 by printing three times.

The spring constant of each layer can also be adjusted.

[0 0 4 1] If the elastomer layer 7 can be roostered between the separator 4 and the sub-gasket 5, after the elastomer layer 7 is roostered on the tips 5 of the beads 6 1 to 6 3, 1 \ / 1 You may face the 8th 3 and the bead of the sub-gasket 5 6 1 ~

The elastomer layer 7 may be placed on the rooster at a position facing 6 3 and then faced with the separator 4.

[0 0 4 2]

(Self-healing elastomer-material) The elastomer layer 7 is composed of a self-healing elastomer-material. Self-healing refers to the ability to recombine and recover the cut site even if the elastomer material is damaged. The rebonding may be, for example, a covalent bond, a hydrogen bond, an ionic bond or a coordination bond, or a bond by electrostatic interaction, hydrophobic interaction, 71 electron interaction or other intermolecular interaction. It may be.

[0 0 4 3] The elastomer layer 7 may be a layer composed of only a self-healing elastomer material, or other elastomer materials or additives as long as the effects of the present invention are not impaired. Etc. may be included.

[0 0 4 4] In the case of the elastomer layer 7 having a multi-layer structure, since each layer constituting the elastomer layer 7 is combined to form one layer, there is no peeling between layers and the elastomer has excellent durability. -Get layer 7. The beads 6 1 to 6 3 themselves may be replaced with the elastomer layer 7 by laminating a plurality of layers and joining the layers to form a thick elastomer layer 7. [0 0 4 5] As the elastomer material having self-healing property, a known material can be used. Known materials include, for example, an ethylene segment made of a hard polymer having a glass transition temperature of 150 ° C or higher, and a soft segment made of a soft polymer having a glass transition temperature of 130 ° C or lower. , And a multi-block copolymer having a certain amount of disulfide bond (see Japanese Patent Application Laid-Open No. 2 0 1 8 -9 8 7 6), a crosslinked polymer crosslinked by interaction with a host group and a guest group. Contains polymer materials (see International Publication No. 2 0 1 7/1 5 9 3 4 6), copolymers of ethylene and anisyl propylene using scandium hornworm medium (T Synthesis of Self-Healing Polymers by Scandiu m-Catalyzed Copolymerization of Ethylene and Anisylpropylenes ”, 5 outside Haobing Wang, J. Am. Chem. Soc., American Chemical Society, 2009, 1 4 l, p. 3 2 4 9 — 3 2 5 7), etc., but not limited to these.

[0 0 4 6] Among them, the self-healing elastomer material may be a self-healing material even when water molecules are present and no external self-healing action is input. preferable. The fuel cell 100 seal is in an environment where hydrogen gas is supplied during power generation and water is generated. According to the above-mentioned elastomer material, self-repair is possible even in such an environment. In addition, even if an action other than the action of the fuel cell 100 itself, for example, an action of applying energy such as irradiation with infrared rays or ultraviolet rays, heating or pressurization, is not input from the outside of the fuel cell 100, self-repair is performed. If it is an elastoma material, it is not necessary to add a self-healing action to the seal placed in the fuel cell 100. Therefore, it is possible to omit the device and work for applying an action from the outside of the fuel cell 100 separately from the fuel cell 100.

[0 0 4 7] Further, it is preferable that the elastomer-material having self-repairing property is bonded and repaired by contact between the elastomer-materials. As described above, since the fuel cell 100 is tightened by the tightening member in the stack direction of each member of the fuel cell 100, the seal is also tightened in the stack direction. Therefore, shaking and power generation at the time of thermal expansion of the electrolyte membrane 1 of the running time of the vehicle, by the wet expansion or the like sheet - the sides of the members sandwiching the Le sheet - Le presses grain ^'Saleya hungry. Press grain ^'has been sheet - le since spread in-plane direction, the elastomer - contacting the cleavage site between materials occurs Ya \\ 0 2021/084463 卩 (: 17162020/060146)

11 Spontaneous self-healing is facilitated even when no external action is input from the fuel cell 100.

[0 0 4 8] The tightening member for tightening the seal may be a fixing member for fixing the stack of cell 10 and the tightening direction is not the stack direction but the in-plane direction of cell 10. It may be. In addition, the tightening force for promoting the tangential insects of the elastomer material should be given to the seal by the tightening force 5 material provided separately from the tightening force 5 material for fixing each of the fuel cell 100 materials. It may be.

[0 0 4 9] Examples of the material having self-repairing property even when water molecules are present and no external action is input include the above-mentioned copolymer of ethylene and anisylpropylene. The above-mentioned copolymer of ethylene and anisylpropylene is self-sufficient in water and in the presence of 1 1 \ / 1 of 3 0 1 ^to 1 or 1 1 \ / 1 of 1 ^{to 10 丨 as under dry conditions.} It has been confirmed to show repairability. It has also been confirmed that the self-repairing of the above ethylene-anisylpropylene copolymer does not require external action such as irradiation with ultraviolet rays, and is spontaneously generated by the tangential insect at the 5th position of the amputation.

[0 0 5 0] As described above, according to the fuel cell 100 of the present embodiment, the self-healing elastomer material is used to form the elastomer layer 7, which is a seal. In the fuel cell 100, the electrolyte membrane 1 tends to shrink and expand, and since the vehicle vibrates a lot during running, the load on the elastomer layer 7 is large, and cut parts such as cracks may occur. However, since the elastomer layer 7 can recombine the 5th position of the cutting edge by self-recovery, the sealing of the fuel cell 100 can be continued. Therefore, the reliability of the fuel gas sealing can be improved.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.

[0 0 5 2]

(Modification example 1) \\ 0 2021/084463 卩 (: 17132020/060146)

12 The self-healing elastomer material can be used not only for the elastomer layer 7 but also for any of the seals provided in the fuel cell 100. For example, a seal 15 provided between each plate 1 1 to 1 3 and between the plate 1 3 and the gas pipe 1 4 is composed of a self-healing elastoma material to form a seal. Even if 15 is damaged, the damaged part can be recovered and the reliability of fuel gas sealing is improved.

[0 0 5 3]

(Modification 2) Not limited to the seal, it is preferable that the sub-gasket 5 is composed of the above-mentioned self-healing elastomer material. Not only can the damage of the sub-gasket 5 be recovered, but the elastomer-material of the separate sub-gasket 5 and the elastomer layer 7 are combined by its self-healing property to form one body 5 material, and the sealing property is improved because there is no gap. It's high.

[0 0 5 4]

(Modification example 3) The sealing property of the fuel gas is required not only when the fuel cell is supplied to the fuel cell 100 but also when the fuel gas is supplied to the fuel cell 100. Therefore, the self-recovering elastomer material can be used in the seal used in the fuel supply system described later.

[0 0 5 5]

(Fuel Supply System) FIG. 6 schematically shows the configuration of the fuel supply system 0 of the present embodiment. The fuel supply system 0 of the present embodiment supplies hydrogen gas as the fuel gas used for power generation of the fuel cell 100 mounted on the four-wheeled vehicle. The fuel cell 100 supplies the driving power of the vehicle, but the target of the power supply is not limited to the four-wheeled vehicle, but may be a three-wheeled or two-wheeled vehicle, or a ship, an aircraft, etc. It may be a moving body.

[0 0 5 6] \\ 0 2021/084463 卩 (: 17132020/060146)

13 As shown in Fig. 6, the fuel supply system 0 is provided with a storage device 8 1 for storing hydrogen gas and a filling device 8 1 capable of filling the storage device 81 with hydrogen gas. In the present embodiment, the fuel cell 100 and the storage device 81 are mounted on the vehicle, and the filling device is installed on the hydrogen station.

[0 0 5 7] Vehicle (This is equipped with battery 2 and motor 3 in addition to fuel cell 100 and storage device 1. Storage device 1 stores hydrogen gas in fuel cell 100 0 0 The battery 2 stores the power generated by the fuel cell 100 and supplies it to the motor 8 3 as the horse ward gravity power of the vehicle 8. The motor 8 3 uses the horse ward gravity power to supply the vehicle 8. Run.

[0 0 5 8] The filling device is equipped with a pressure accumulator, a pre-clad, a pre-la, and a dispenser, such as 3. The accumulator 1 stores the compressed hydrogen gas, and the precooler 2 cools the hydrogen gas of the accumulator 1 and sends it to the dispenser 3. The dispenser-3 is equipped with an operation panel, and the storage device 1 on both sides of the vehicle is filled with hydrogen gas cooled according to the operation from the operation panel.

[0 0 5 9] Further, the fuel supply system (:) is provided with a connection portion for connecting the transfer destination and the transfer source of hydrogen gas, and this connection 咅 5 is provided with a seal for sealing the fuel gas. Specifically, the storage device 1 includes a first connection portion 4 connected to the filling device, and the first connection portion 4 is, for example, a resector pull (receptacle) provided in the vehicle body of a vehicle or the like. On the other hand, filling. The system is provided with a second connection 4 connected to the storage device 81. The second connection 4 is, for example, a nozzle provided in the dispenser 3 to discharge gas. The tip of the nozzle is , It has a shape that fits with the resector pull. During filling, the nozzle is fixed in the fitted state, and when filling is completed and decompression is completed, the fitting of the nozzle is released.

[0 0 6 0] The first connection part 8 4 is equipped with a seal V 7, and the second connection part 4 is equipped with a seal V 6. The seal V 7 is provided, for example, as a surface layer covering a fitting portion with a nozzle pull nozzle. Seal V 6 is, for example, a nozzle pull sector pull \\ 020 21/084463 卩 (: 17132020/060146)

It is a 0 ring etc. provided at the fitting part with 14. It should be noted that both the first connection portion 4 and the second connection portion 4 may be configured to have a seal, or one of them may be configured to have a seal.

[006 1] Seals V 6 and V 7 are composed of the self-healing elastomer materials described above. Even if the seals V 6 and V 7 are damaged, they can be repaired, so that the reliability of fuel gas sealing can be improved.

[0 0 6 2] Seals can be provided not only between the storage device 1 and the filling device, but also at each connection that connects the transfer destination and the transfer source. For example, other seals include the seal V 1, the precooler-the snake 2, the dispenser-the snake 3, the fuel cell 100, and the gas pipe of the storage device 81, which are provided in the import with the gas pipe of the accumulator mine 1. Examples include the seals V 2 to V 5 provided on the impot and the out port. These seals V 1 --V 5 can also be configured to include the self-healing elastomer material described above in order to improve the reliability of fuel gas sealing.

[0 0 6 3] The configuration of the fuel supply system 0 is an example, and the present invention is not limited to this. For example, the vehicle may not be provided with a battery 82, and the electric power generated by the fuel cell 100 may be supplied to a drive device such as a motor cell. Further, the filling device may be mounted on the moving body, and the target for supplying electric power may not be the moving body but may be a portable electric generator, a stationary generator, or the like.

[Explanation of symbols]

[0 0 64]

1 0 0 .. ^· Fuel cell, 10 .. ^{· ·} Cell, 1 .. ^{· ·} Electrolyte membrane, 2 .. ^{· ·} Electrode, 3 .. ^{· ·} Membrane electrode assembly, 4 .. ^{· ·} Separater, 5 ... Sub Gasket, 6 1 to 6 3 .. Bead, 7 .. ^· Elastite layer, 1 5 .. ^· Seal, (: .. · Fuel supply system, 1 ^{· · · ·} Storage device, Min · · · · Filling device, V 1~ V 7 ^{· · ·} seal

Claims

\\ 0 2021/084463 卩 (: 17132020/060146 15 [Document name] Claims

1. A fuel cell (100) for generating electricity by chemically reacting a fuel gas, and a seal (7, 0) for sealing the fuel gas in the fuel cell (100). A fuel cell (100) equipped with 1 5) and containing a self-healing elastomer material.

2. A membrane electrode assembly (3) comprising an electrolyte membrane (1) and a pair of electrodes (2) arranged on both sides of the electrolyte membrane (1), and the electrolyte membrane (1). The seal (7, 15) is the same as the sub-gastaker (5) surrounding the outer peripheral edge of the membrane electrode joint (3) and the pair of separations (4) arranged on both sides of the membrane electrode assembly (3). The fuel cell (100) according to claim 1, which is provided between the separator (4) and the sub-basket (5).

3. The separation (4) is provided with protrusions (6 1 to 6 3) on the surface facing the sub-gasket (5), and the seal (7, 15) is the protrusion. The fuel cell (100) according to claim 2, which is arranged between the tip of (6 1 to 6 3) and the sub-gasket (5).

4. The fuel cell (100) according to any one of claims 1 to 3, wherein the seal (7, 15) has a multi-layer structure.

5. The fuel according to any one of claims 1 to 4, wherein the elastomer material has self-healing properties even when water molecules are present and no action for self-healing is input from the outside. Battery (100). \\ 020 21/084463 卩 (: 17132020/060146)

16

6. The seal is tightened by each member constituting the fuel cell (100), and the self-healing elastomer materials that are in contact with each other by the tightening are bonded to each other, according to claims 1 to 1. The fuel cell according to any one of 5 (100).

7. The fuel cell (100) of claim 2, wherein the sub-gasket (5) comprises the self-healing elastomer material.

8. A pair of collector cells (1 1), a pair of insulator plates (1 2), and a pair of end plates (1 3) arranged on both sides of a pair of separates (4). ) And the gas flow path (1 4) provided on the end plate (1 3), and the collector pre-卜 (1 1), insulator pre-卜 (1 2) and end pre- The 卜 (1 3) is provided with through holes (1 to 4) communicating with the gas flow path (1 4), and the seals (7, 15) are provided with the respective cells (1 1 to 1 to 5). 1 3) The fuel cell (100) according to claim 1, which is arranged between them and surrounds the outer periphery of the through holes (1 to 4).

9. A fuel supply system for supplying fuel gas used for power generation of a fuel cell (100), comprising a seal (V 1 to 7) for sealing the fuel gas, and described above. Seals (V 1-7) are fuel supply systems (〇) containing self-healing elastoma materials.

10. A storage device (1) for storing a fuel gas used for power generation of a fuel cell (100), which is a seal (V 4, V 5, V) that seals the fuel gas. The seal (V 4, V 5, V 7) is equipped with V 7) and contains a self-healing elastomer material. \\ 0 2021/084463 卩 (: 17132020/060146)

17 Storage device (1).

[Claim 1 1] A filling device (Mi) that fills a storage device (1) for storing fuel gas used for power generation of a fuel cell (100) with the fuel gas. A filling device (巳) equipped with a sealing seal (V 1-3, V 6), which contains a self-healing elastoma material.