JP4438983B2 - Fuel container for fuel cell - Google Patents

Description

  The present invention relates to a fuel container for a fuel cell that contains a fuel such as an aqueous methanol solution supplied to a fuel cell such as a polymer electrolyte fuel cell (PEFC), is attached to the fuel cell, and supplies the fuel cell directly. The present invention relates to a fuel container for a fuel cell that reinjects fuel into a fuel container that is used by being attached to the fuel cell.

  Conventional containers for storing solutions include, for example, aerosol containers and cosmetic containers. Glass, metal, and plastic are used for the container body. By pressurizing the inside of these containers, when the nozzle is opened, the solution inside flows out in a spray state and is used.

In the container as described above, a spring is used as a biasing member that biases the nozzle in the closing direction. As this spring, a metal coil spring is generally used from the viewpoint of cost and convenience, but in order to increase the recycling rate, a structure in which the urging member is made of a resin cylindrical elastic material has been proposed. (For example, refer to Patent Document 1).
JP-A-11-90282

  By the way, for example, the use of a fuel cell as a small power source for a portable personal computer (notebook personal computer, PDA, etc.) and other devices is being studied. However, a fuel container for supplying fuel to the fuel cell is required. For example, for a polymer electrolyte fuel cell (PEFC), pure water or pure water added to methanol, or pure methanol or pure ethanol is used. Also, dimethyl ether is expected to be used in solid oxide fuel cells (SOFC) and solid polymer fuel cells (PEFC).

  However, in a fuel cell such as a polymer electrolyte fuel cell (PEFC) or a solid oxide fuel cell (SOFC), metal ions are extremely disliked, so that metal ions are not mixed in the fuel contained in the fuel container. It was found that it was necessary to configure as follows.

  It is inappropriate to use a metal for the member in contact with the fuel because ions are generated. Even if a resin is coated on the metal, the generation of ions is unavoidable due to the pinhole of the resin film. In addition, when the internal pressure is applied to the fuel container and the fuel is jetted and supplied by the internal pressure, it is not preferable that the jetted material and the fuel are mixedly supplied.

  In addition, the shape of the fuel container is set according to the shape of the fuel container housing portion in a device such as a fuel cell main body or a notebook personal computer equipped with the fuel cell, and a specific type according to a specific model. Disposing such a fuel container in a shape according to fuel consumption is disadvantageous in terms of cost, and is difficult to obtain and has a problem of lack of convenience.

  The present invention has been made in view of the above points. A fuel container for a fuel cell to be mounted on a fuel cell that can be used repeatedly without being mixed with metal ions and an injection material, and a fuel in a fuel container to be mounted on a fuel cell. An object of the present invention is to provide a fuel container for a fuel cell that re-injects fuel.

  A fuel container for a fuel cell according to the present invention is a fuel container that contains fuel to be supplied to a fuel cell, and has a container body having a sealed structure, and a flexibility that is installed in the container body and contains the fuel therein. An inner container composed of a bag; a valve mechanism installed in the container body for opening and closing the supply of fuel contained in the inner container; and a fuel installed in the container body and communicated with the interior of the inner container An injection valve for injecting fuel, and a compressed gas for fuel injection sealed between the container main body and the inner container, and all the constituent members in contact with the fuel are made of a non-metallic material. The fuel cell is attached to the fuel cell and the fuel is directly supplied to the fuel cell.

  Further, another fuel container for a fuel cell according to the present invention is a fuel container for storing fuel to be supplied to the fuel cell, the container main body having a sealed structure, and the fuel stored in the container main body. An inner container composed of a flexible bag, a valve mechanism for opening and closing the supply of fuel that is installed in the container main body and communicated and accommodated inside the inner container, and for injecting fuel into the inner container, A fuel jet compressed gas sealed between the container main body and the inner container, and all the constituent members that come into contact with the fuel are made of a non-metallic material, and are mounted on a fuel cell. The fuel is directly supplied to the battery.

  Furthermore, another fuel container for a fuel cell according to the present invention is a fuel container for storing fuel to be supplied to the fuel cell, the container main body having a sealed structure, and the fuel stored in the container main body. An inner container composed of a flexible bag, a valve mechanism that is installed in the container main body and opens and closes the supply of fuel that is communicated and accommodated inside the inner container, and between the container main body and the inner container A fuel injection compressed gas sealed at a pressure set higher than the fuel pressure of a fuel container that is attached to the fuel cell and supplies fuel directly to the fuel cell, and all the components that come into contact with the fuel It is composed of a non-metallic material and is characterized by reinjecting fuel into the fuel container that supplies fuel directly to the fuel cell.

  Furthermore, another fuel container for a fuel cell according to the present invention is a fuel container for storing fuel to be supplied to the fuel cell, and a cylindrical container body for storing the fuel therein, and the inside of the container body is hermetically sealed. A piston-type push-out member that is manually operated to slide and pressurize the fuel, and a valve mechanism that opens and closes the supply of the fuel stored in the container body, and all the components that come into contact with the fuel It is made of a non-metallic material, and is characterized in that fuel is reinjected into a fuel container that is mounted on a fuel cell and directly supplies fuel to the fuel cell.

  The container body in each fuel cell fuel container is preferably made of a transparent material.

  In the fuel container according to the present invention, it is preferable that the fuel is methanol and pure water, ethanol and pure water, or pure methanol or pure ethanol, and is used for fuel supply of a polymer electrolyte fuel cell (PEFC). Also, dimethyl ether can be used as a fuel for a solid oxide fuel cell (SOFC) or a polymer electrolyte fuel cell (PEFC).

  According to the present invention as described above, a container body having a sealed structure, an inner container for containing fuel, and a valve mechanism for opening and closing the supply of fuel are provided, and all the components that come into contact with the fuel are made of a non-metallic material. By configuring and sealing the compressed gas between the container body and the inner container, it is possible to supply only the fuel, and further, the contained fuel can be prevented from coming into contact with the metal and mixing of metal ions can be prevented. In a fuel cell such as a polymer electrolyte fuel cell (PEFC), it is extremely hated that metal ions are present in a fuel such as an aqueous methanol solution or an ethanol aqueous solution to be supplied. The fuel can be re-injected and can be re-injected, and the fuel can be re-injected and attached directly to the fuel container or the fuel cell. Fuel container to re-inject fuel into the fuel container can be constructed.

  In other words, in a fuel container further provided with an injection valve for reinjecting fuel, or a fuel container with a valve mechanism capable of supplying and injecting fuel, by using a fuel container configured for fuel reinjection, The user can easily refill the fuel, it can be used repeatedly and is not disposable, which is advantageous in terms of cost, and the flexibility of the shape corresponding to the model is increased, and the fuel container for injection is generalized. This makes it easier to obtain additional fuel and improves convenience.

  In particular, in a fuel container provided with an injection valve separately from the valve mechanism connected to the fuel cell, the fuel can be reinjected from the injection valve in a state where the fuel container is mounted on the fuel cell. On the other hand, in a fuel container equipped with a valve mechanism capable of supplying and reinjecting fuel, the fuel container is removed from the fuel cell and reinjecting fuel. However, a separate injection valve is omitted and the structure is simplified. Can be achieved.

  On the other hand, the pressure of the compressed gas sealed between the container body and the inner container is set to be higher than the fuel pressure of the fuel container that is attached to the fuel cell and supplies fuel directly to the fuel cell, or the cylinder shape In the fuel container having the container main body and the manually operated piston-like pushing member, the fuel can be reinjected into the fuel container for supplying the fuel directly to the fuel cell. Convenience can be improved by configuring various forms in consideration of the degree of freedom, portability, and the like.

  It is preferable that the container body is made of a transparent material because the remaining amount of fuel and the reinjection state can be monitored.

  In addition, the following effects can be obtained with the resinization of the fuel container. The container shape can be formed into various shapes such as a cylindrical shape, a polygonal shape, and an elliptical shape. Easy to separate and suitable for recycling. When touching the hand, there is no cold like metal, and a warm feeling is good. Changes in contents due to corrosion are unlikely to occur.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a schematic cross-sectional view of a fuel container for a fuel cell used by being mounted on a fuel cell according to one embodiment, and FIG. 2 is a cross-sectional view of a main part showing an installation example of a valve mechanism.

  A fuel container 1 for a fuel cell according to the present embodiment accommodates methanol and pure water or ethanol and pure water or pure methanol or pure ethanol having a predetermined concentration as a fuel F for a fuel cell, such as a polymer electrolyte fuel cell (PEFC). The fuel F is mounted on a fuel cell body (not shown), and fuel F can be reinjected using an injection fuel container 10 or 20 described later, and is used repeatedly.

  As shown in FIG. 1, the fuel container 1 includes an outer container body 2 constituting an outer shape, and an inner container made of a flexible bag that is disposed in an inner space of the container body 2 and accommodates the fuel F therein. 3, a valve mechanism 4 for supplying fuel stored by opening and closing an upper supply port 2 a communicating from the inside of the inner container 3 to the outside of the container body 2, and the inner container 3 at the bottom opposite to the supply port 2 a An injection valve 5 for injecting fuel by opening and closing an injection port 2b communicating with the outside of the container body 2 from the inside of the container, and a dip tube 6 inserted into the internal space of the inner container 3 from the valve mechanism 4 Is done. And all the parts which comprise these, especially the parts which contact fuel, are comprised with a nonmetallic material, ie, resin. Further, the space between the container body 2 and the inner container 3 is formed in an airtight manner, and a compressed gas G that applies pressure for ejecting the fuel F to the inner container 3 is sealed in the space.

  The container body 2 is in the form of a sealed box, and the shape thereof is set according to the shape of the fuel container housing portion in a fuel cell body (not shown) or a device such as a notebook personal computer equipped with the fuel cell. Further, the shape can be arbitrarily changed in order to secure a predetermined internal volume, and is provided in a structure and a wall thickness that secures a pressure resistance against a housing pressure. The outer container body 2 is made of a transparent material, for example, a molded product such as transparent PC, PAN, PEN, or PET, so that the remaining amount of fuel can be confirmed based on the shape of the inner container 3.

  On the other hand, the inner container 3 is resistant to fuel, and a rubber film or a sheet of PAN, PEN or the like deposited with ceramic, and a metal foil (for example, aluminum foil) bonded to a sheet of PE, PP or the like. A thing is made into a bag shape and it adheres to the supply port 2a and the injection port 2b of the container main body 2 in a sealed state. The inner volume of the inner container 3 is set so as to prevent gas permeability and increase the fuel volume ratio with respect to the entire volume of the container body 2.

  As the compressed gas G sealed between the outer container body 2 and the inner container 3, air, nitrogen, carbon dioxide, or the like is used. In the case of a gas that does not contain oxygen such as nitrogen, the oxidation of fuel (particularly methanol) by the trace amount of oxygen that has permeated through the inner container 3 can be prevented. Since the compressed gas is used, the change in pressure with respect to the temperature rise of the container main body 2 is reduced while the liquefied gas is used.

  The said valve mechanism 4 is installed in the inside of the supply port 2a formed in the protruding cylinder shape in a part (upper part in the figure) of the container main body 2, The specific example is demonstrated based on FIG. The valve mechanism 4 is provided with a flow rate adjusting mechanism 7 and a resistance mechanism 8. In the embodiment of FIG. 2 (a), the opening portion of the supply port 2 a of the container body 2 (part connected to the fuel cell) A flow rate adjusting mechanism 7 (specific configuration is not shown) is installed, and a valve mechanism 4 is installed on the bottom side thereof. On the other hand, in the embodiment of FIG. 2 (b), the valve mechanism 4 is installed in the opening portion (connection portion with the fuel cell) of the supply port 2a of the container body 2, and the flow rate adjusting mechanism 7 (specifically, on the bottom side). The configuration is not shown). The basic structure of the valve mechanism 4 is configured similarly in FIGS. 2A and 2B, and will be described with the same reference numerals.

  The valve mechanism 4 includes a guide screw 41 as a fixing member to the container body 2, a gasket 42 as a valve body that opens and closes fuel supply, a valve stem 43 as an operation member for opening and closing, and a biasing member in a closing direction The resin spring 44 and the valve housing 45 that accommodates the resin spring 4 are all formed of a non-metallic material.

  A valve housing 45 is attached to the supply port 2 a of the container body 2. In FIG. 2 (b), the flow rate adjusting mechanism 7 is assembled in advance at the bottom of the valve housing 45. A resin spring 44 is inserted into the valve housing 45, a valve stem 43 is inserted thereon, a gasket 42 is fitted on the outer periphery of the valve stem 43, and a guide screw 41 is attached to the container body 2 from above the valve stem 43. Screwed and assembled. The valve stem 43 is urged toward the upper guide screw 41 by the urging force of the resin spring 44, and the outer peripheral portion of the gasket 42 is held and fixed to the container body 2 by the guide screw 41.

  The valve stem 43 has a circumferential groove on the outer periphery, and a communication narrow port opened at the bottom of the circumferential groove communicates with the central passage, and the central passage opens at the upper end outlet. The gasket 42 is fitted into the circumferential groove of the valve stem 43, and the communication narrow port is closed by the elastic contact of the inner peripheral surface of the gasket 42, thereby shutting off the fuel supply. Further, when the valve stem 43 is pushed against the resin spring 44 from the upper side according to the connection with the fuel cell, through the flow rate adjusting mechanism 7 in FIG. 2A and directly in FIG. Along with the movement, the inner peripheral portion of the gasket 42 is deformed to open the communication narrow port, and the fuel that has flowed into the valve housing 45 from the dip tube 6 and through the flow rate adjusting mechanism 7 in FIG. From the upper end opening through the central passage, the fuel cell is supplied directly to the fuel cell in FIG. 2B and to the fuel cell through the flow rate adjusting mechanism 7 in FIG.

  The shape of the resin spring 44 as the urging member includes a disc-like support base that maintains the posture of the lower end, a contact portion that contacts the bottom of the valve stem 43 at the upper end and transmits the urging force, It is comprised with the deformation | transformation part of the return | turnback shape which connects. For example, the resin spring 44 is formed of polyacetal (POM).

  The flow rate adjusting mechanism 7 employs, for example, a filter compression structure, a filter made of urethane foam or the like is disposed in a compressed state in the fuel flow path, and adjusts the flow rate of the fuel by changing its compression rate, It is configured to suppress a sudden jet of fuel and to reduce the load of the flow rate adjusting mechanism on the main device side. The valve mechanism 4 is provided with a resistance mechanism 8 that prohibits an inadvertent opening operation. In the case shown in the figure, the periphery of the opening end of the supply port 2 a of the container body 2 is formed outside the tip of the valve step S 43 to form the resistance mechanism 8, and other members are prevented from contacting the tip of the valve stem 43. is doing.

  The injection valve 5 has basically the same configuration as the valve mechanism 4 described above, but the flow rate adjusting mechanism 7 may not be installed.

  The fuel container 1 as described above has a double structure of the container body 2 and the inner container 3 so that the fuel F is ejected with a pressure within a predetermined range and other than the fuel is ejected. The function of preventing fuel leakage against the fuel is further enhanced. In addition, in a notebook personal computer and a PDA, it is possible to meet the demand for high space efficiency, and it is possible to configure a fuel container that is small and has a large capacity. Further, an injection valve 5 is provided separately from the valve mechanism 4 connected to the fuel cell so that fuel can be reinjected from the outside into the injection valve 5 without removing the fuel container 1.

  In the fuel container 1 of the present embodiment, methanol, an aqueous ethanol solution, pure methanol, or pure ethanol is used as the fuel, but dimethyl ether is used as the fuel for the solid oxide fuel cell (SOFC) and the solid polymer fuel cell (PEFC). Can also be used. This dimethyl ether is gaseous at room temperature, and when compressed and injected as a liquefied gas, it has an ejection pressure by itself, so that it is not necessary to enclose the compressed gas between the container body 2 and the inner container 3 There is. Further, since dimethyl ether has a high pressure, it needs to have a pressure-resistant structure, and further needs to have a structure resistant to solubility. In this case, since the fuel container 1 has a double structure, the inner container 3 can secure resistance to highly soluble dimethyl ether and a leak prevention function, and the container body 2 can ensure a pressure resistant structure against cracking and deformation. .

  FIG. 3 is a schematic sectional view of a fuel cell fuel container 1 ′ according to another embodiment. The function of the injection valve 5 in the above embodiment is provided in the valve mechanism 4 of the supply port 2 a, and the injection valve 5 is installed. The structure is omitted. Others are the same as those of the above-described embodiment of FIG. 1, and the same portions are denoted by the same reference numerals and the description thereof is omitted.

  In the present embodiment, for example, fuel can be supplied to the fuel cell and fuel can be reinjected by opening and closing the valve mechanism 4 as shown in FIG. 2, and the fuel container 1 'is placed in the fuel cell at the time of fuel reinjection. Although it will be performed by removing more, the structure is simplified.

  According to each embodiment of the fuel container 1, 1 ′ mounted on the fuel cell as described above, metal ions are mixed into the fuel for the fuel cell such as aqueous methanol solution or aqueous ethanol solution due to the resinization of the parts that come into contact with the fuel. In addition, a good fuel container for a polymer electrolyte fuel cell (PEFC) that does not contain propellants and is extremely disliked by the presence of metal ions can be constructed, and the performance of the fuel cell is not impaired. Can be used repeatedly by injection.

  4 and 5 show two embodiments of an injection fuel container used to reinject fuel when the fuel in the inner container 3 of the fuel cell fuel container 1, 1 ′ decreases. It is a schematic sectional drawing.

  An injection fuel container 10 shown in FIG. 4 includes a container body 12, an inner container 13 made of a flexible bag, a valve mechanism 14 (nozzle mechanism), a resistance mechanism 15, and a dip tube 16, and the basic structure is the fuel container 1, 1 ', the fuel F is accommodated in the inner container 13, the compressed gas G for injection is enclosed between the container main body 12 and the inner container 13, and the valve mechanism 14 is connected to the injection valve of the fuel container 1. 5 or the valve mechanism 4 of the fuel container 1 ′ is connected to be connected, and the contained fuel F is injected under the pressure of the compressed gas G.

  The pressure of the sealed compressed gas G in the fuel container 10 for injection is set higher than the pressure of the compressed gas G in the fuel containers 1 and 1 ', that is, the fuel pressure in the fuel container to be reinjected. Even when the remaining amount of fuel in the fuel tank 10 is reduced, fuel can be sufficiently injected into the fuel containers 1 and 1 '.

  The valve mechanism 14 is basically the same as the valve mechanism 4 shown in FIG. 2 described above, but the tip of the valve stem protrudes and presses the valve stem 43 of the valve mechanism 4 in the fuel container 1 to pass the valve mechanism 14. The injection is performed by opening the.

  The resistance mechanism 15 is, for example, a cylinder wall formed on the outer periphery of the valve mechanism 14 to prevent fuel injection due to an unintentional opening operation of the valve mechanism 14. The resistance mechanism 15 is provided with the injection valve 5 of the fuel container 1 or the fuel container 1 ′. Due to the combined structure with the valve mechanism 4, it is provided so as not to become an obstacle at the time of reinjection.

  An injection fuel container 20 of another form shown in FIG. 5 is a manual injection type and does not contain compressed gas for injection. The fuel container 20 for injection includes a cylindrical container main body 21, a piston-like push-out member 22 that slides in an airtight state in the container main body 21, and a valve mechanism 23 ( Nozzle mechanism), a lid member 24 that closes the container body 21 on the opposite side of the valve mechanism 23, and a resistance mechanism 25, and the fuel F contained therein by the retraction operation of the extrusion member 22 The fuel in the container main body 21 is pressurized by the forward movement of 22a and injected into the inner container 3 of the fuel container 1, 1 'through the valve mechanism 23.

  Further, the container body 21 is provided with a fitting projection 21a at the joint portion with the lid member 24, and the fuel remaining inside the container body 21 when connected to the fuel container 1, 1 'is contained in the container body 21. The function of preventing the push-out member 22 from moving backward and the lid member 24 from being separated when backflowing is obtained.

  Also in the fuel containers 10 and 20 for injection, components that come into contact with the fuel F are made of a non-metallic material, that is, a resin, and mixing of metal ions into the fuel F is prevented. The container bodies 12 and 21 are made of a transparent material so that the internal volume can be confirmed. Furthermore, the shape of the container bodies 12 and 21 is arbitrary, and is configured in various forms in consideration of the fuel capacity, portability, and the like.

  The resin materials of the parts that come into contact with the fuel in the fuel containers 1 and 1 'and the fuel containers 10 and 20 are PE, PP, AS, ABS, PAN, PA, PET, PBT, PC, POM, PEN, and the like. Can be used, but is selected depending on the contents, shape, strength, and the like. For example, considering resistance to methanol, polyethylene (PE), polypropylene (PP), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), and polyacrylonitrile (PAN) are preferable, and acrylonitrile butadiene styrene (ABS), polyamide (PA) and polyacetal (POM) can also be used. Considering the resistance to ethanol, polyethylene (PE), polypropylene (PP), polyamide (PA), polyacetal (POM), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), and polyacrylonitrile (PAN) are excellent. Preferably, acrylonitrile butadiene styrene (ABS) can also be used.

  In consideration of resistance to dimethyl ether, it is composed of a crystalline resin such as polyamide (PA), polyacetal (POM), polybutylene terephthalate (PBT), polypropylene (PP), or the like. Alternatively, it is preferable to form an amorphous resin such as acetal, polycarbonate, or acrylonitrile butadiene styrene and coat the surface with an epoxy resin or a polyamide resin.

  As the molding structure, there are a single-layer structure formed of a single material and a two-layer (multi-layer) structure formed of a plurality of materials. In the case of a two-layer structure, a material having excellent resistance is used for the inner layer portion touched by the contents, and a material having excellent pressure resistance and impact resistance is used for the outer layer, and the two-layer molding or coating is used.

1 is a schematic cross-sectional view of a fuel container for a fuel cell attached to a fuel cell in one embodiment of the present invention. Cross-sectional view of the main part showing two installation examples of the valve mechanism Schematic sectional view of a fuel container for a fuel cell to be attached to a fuel cell according to another embodiment 1 is a schematic cross-sectional view of a fuel cell fuel container for fuel reinjection in one embodiment. Schematic sectional view of a fuel container for a fuel cell for fuel reinjection according to another embodiment

Explanation of symbols

1,1 'Fuel cell fuel container for fuel cell installation 2 Container body
2a Supply port
2b Inlet 3 Inner container 4 Valve mechanism 5 Injection valve
10, 20 Fuel cell fuel container for injection
12, 21 Container body
13 Inner container
14, 23 Valve mechanism
22 Extruded member
24 Lid member F Fuel G Compressed gas

Claims (4)

A fuel container containing a fuel made of methanol or an aqueous ethanol solution or pure methanol or pure ethanol or dimethyl ether supplied to a fuel cell,
A container body having a sealed structure;
An inner container configured with a flexible bag installed in the container body and containing the fuel therein;
A valve mechanism that is installed in the container body and opens and closes the supply of fuel communicated and stored in the interior of the inner container;
An injection valve for injecting fuel in communication with the interior of the inner container installed in the container body;
A compressed gas for fuel ejection pressure enclosed between the container body and the inner container;
The fuel container for a fuel cell is characterized in that all of the constituent members that come into contact with the fuel are made of a non-metallic material, and are attached to the fuel cell to supply the fuel cell directly. A fuel container containing a fuel made of methanol or an aqueous ethanol solution or pure methanol or pure ethanol or dimethyl ether supplied to a fuel cell,
A container body having a sealed structure;
An inner container configured with a flexible bag installed in the container body and containing the fuel therein;
A valve mechanism for opening and closing the supply of fuel that is installed in the container body and communicated and accommodated inside the inner container, and for injecting fuel into the inner container;
A compressed gas for applying a pressure for fuel injection sealed between the container body and the inner container;
The fuel container for a fuel cell is characterized in that all of the constituent members that come into contact with the fuel are made of a non-metallic material, and are attached to the fuel cell to supply the fuel cell directly. A fuel container containing a fuel made of methanol or an aqueous ethanol solution or pure methanol or pure ethanol or dimethyl ether supplied to a fuel cell,
A container body having a sealed structure;
An inner container configured with a flexible bag installed in the container body and containing the fuel therein;
A valve mechanism that is installed in the container body and opens and closes the supply of fuel communicated and stored in the interior of the inner container;
The injection pressure enclosed by the pressure set higher than the fuel pressure of the fuel container for fuel cells into which fuel is reinjected from the injection valve of Claim 1 is added between the said container main body and the said inner container. With compressed gas ,
A fuel container for a fuel cell, wherein all of the constituent members that come into contact with the fuel are made of a non-metallic material, and the fuel is reinjected into the fuel container that supplies fuel directly to the fuel cell. The fuel container for a fuel cell according to any one of claims 1 to 3 , wherein the container body is made of a transparent material.

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