Method and system for filling a fluid container

Abstract

The invention relates to a method (V) for filling a fluid container (1), in particular a fluid container for a fuel cell, having the following steps: providing (V1) a pressure chamber (2) having a pressure chamber interior (4); positioning (V2) the fluid container (1) within the pressure chamber interior (4) such that a volume chamber (3) of the fluid container (1) is fluidically connected to the pressure chamber interior (4); evacuating (V3) the pressure chamber interior (4) to a target negative pressure such that a negative pressure difference is initially formed in the pressure chamber interior (4) relative to the volume chamber (3) as a result of the fluid coupling; and filling (V5) the fluid container (1) by means of a fluid introduced into the volume chamber (3).

Description

Technical Field

[0001] The present invention relates to a method for filling a fluid container, particularly a fluid container for operating a hydrogen fuel cell, and also to a system for filling a fluid container for operating a hydrogen fuel cell. Background Technology

[0002] A fuel cell is a primary cell that converts the chemical reaction energy of a continuously supplied fuel and oxidant into electrical energy. Therefore, a fuel cell is not an energy storage device, but rather an energy converter supplied with fuel (energy in a chemically combined form). However, a complete fuel cell system can also include a fuel storage device. Such fuel cells are generally known and therefore require no further explanation.

[0003] When operating such a fuel cell, the chemical binding energy of the fuel is directly converted into electrical energy. In conventional fuel cells, hydrogen is used as the reactant gas in particular. In this case, the chemical purity or concentration of the hydrogen is crucial; therefore, fuel cell manufacturers set strict specifications for the purity or concentration of the hydrogen. To achieve these specifications, a vacuum is typically first created in the hydrogen container, causing the contained gases to escape, and then the hydrogen container is filled with hydrogen from a hydrogen tank system.

[0004] For weight reasons, modern hydrogen containers are typically made of composite materials and contain an inner wall layer of synthetic material (particularly polyamide or polyethylene) as a core, known as a liner, which prevents hydrogen from diffusing through the container. Due to this structure, lightweight containers, especially those made of composite materials, cannot be placed under a vacuum without damage, as their liner, designed to meet specified permeability limits, will collapse and break. For these reasons, a method known as alternating pressure purging is often used in these containers that lack vacuum capability. In alternating pressure purging, gaseous nitrogen is forced into the closed container to displace oxygen. Subsequently, hydrogen is alternately added, and the resulting mixture is vented to the atmosphere. During purging, the gas initially contained in the container escapes. This process, with its shut-in-open-purging steps, continues until the desired concentration is reached.

[0005] However, the alternating pressure flushing method involves repeatedly filling and emptying the tank system with hydrogen, resulting in a very long processing time. Furthermore, it is associated with high gas consumption, as the gases used are contaminated by the introduction of nitrogen and therefore cannot be recovered or reused. Summary of the Invention

[0006] In this context, the object of the present invention is to provide an improved method, particularly a resource-saving method.

[0007] According to the present invention, the above-mentioned objective is achieved by a method having the features of claim 1 and / or by a system having the features of claim 12.

[0008] According to a first aspect of the invention, a method for filling a fluid container, particularly a fluid container for operating a hydrogen fuel cell, is provided. The method according to the invention includes the following steps: providing a pressure chamber having a pressure chamber interior; positioning the fluid container inside the pressure chamber such that the storage space of the fluid container is fluidly connected to the pressure chamber interior; evacuating the pressure chamber to a target negative pressure, such that due to fluid coupling, an initial negative pressure difference is formed inside the pressure chamber relative to the storage space; and filling the fluid container by introducing fluid into the storage space.

[0009] According to a second aspect of the invention, a system for filling a fluid container is provided for operating a hydrogen fuel cell, particularly for implementing the method according to the invention. The system according to the invention includes a pressure chamber having a fluid-tight interior and a fluid container positioned within the pressure chamber, the storage space of the fluid container being fluidly connected to the pressure chamber interior. The system according to the invention further includes a compressor device configured to generate a negative pressure differential within the pressure chamber relative to the storage space; wherein the system is implemented to implement the method according to the invention.

[0010] The present invention is based on the idea of ​​establishing a controlled, compact atmosphere in which a fluid container is positioned, wherein the pressure can be controlled in a purposeful manner, and a pressure difference is established between the outside and inside of the fluid container. This pressure difference is set to prevent damage to the lining of the fluid container. Advantageously, the fluid container is initially evacuated to create a negative pressure difference or negative pressure in the space surrounding the fluid container relative to the storage space of the fluid container, causing the fluid located in the storage space to flow out into that space. In this case, a negative pressure difference can also be generated in the pressure chamber compared to the ambient atmosphere surrounding the pressure chamber. Subsequently, when a target negative pressure is reached in the storage space, comprising a vacuum or containing only a predetermined acceptable amount of residual material, the storage space of the fluid container is filled with any fluid that has not been contaminated by the fluid previously contained in the storage space. According to the invention, the space surrounding the fluid container is implemented as a pressure chamber, in other words, implemented as a closed system with an adjustable pressure ratio. The pressure chamber is hermetically sealed (that is, in a way that it is fluid-impermeable relative to the environment).

[0011] Advantageous implementations and improvements will be apparent from the additional dependent claims and the description with reference to the accompanying drawings.

[0012] According to one embodiment of the method, the fluid container has a liner configured to seal the storage space of the fluid container in an airtight manner relative to the outside. The liner corresponds to the inner layer of a fluid container made of composite materials, particularly a composite gas cylinder, and forms a thin-walled barrier layer to reduce gas diffusion through the walls of the fluid container. Therefore, materials used for the fluid container that do not possess sufficient airtightness due to their material properties or processing methods, but have other suitable properties, can also be used. Thus, for example, the weight of the fluid container can be reduced, or the thermal conductivity and / or electrical conductivity can be increased or decreased. Furthermore, the liner can support a valve.

[0013] According to another embodiment, after the evacuation step, the method further includes a step of switching from a evacuated state to a filled state, in which fluid exchange is permitted between the storage space of the fluid container and the interior of the pressure chamber, and in the filled state, fluid exchange is permitted between the storage space of the fluid container and the fluid tank to which the fluid is connected. In this case, it will be clear to those skilled in the art that fluid exchange is prevented according to the corresponding other states in the respective states. That is, in the evacuated state, fluid exchange is permitted between the storage space of the fluid container and the interior of the pressure chamber, but fluid exchange is not permitted between the storage space of the fluid container and the fluid tank. In the filled state, the situation is reversed accordingly. In this case, the switching can be automated, particularly by a control device, or by user control.

[0014] However, the invention is not limited to the states described above, but may also include, for example, a delivery state in which the storage space is fluidly isolated from the external environment. This switching is performed, for example, via a controllable multi-port valve fluidly connected to the fluid container.

[0015] According to another embodiment of the method, during the evacuation step, fluid exchange between the storage space and the pressure chamber of the fluid container is at least temporarily prevented, causing a temporary increase in the pressure differential between the storage space and the pressure chamber. Fluid exchange can be prevented, for example, by a sealing element at the outlet of the fluid container. In this way, damage to the liner can be prevented by mitigating pressure changes in the storage space or by maintaining a predetermined minimum pressure differential.

[0016] According to another embodiment of the method, a target negative pressure is generated by using a compressor device. The compressor device is fluidly coupled to the pressure chamber and is configured to generate a negative pressure difference or negative pressure inside the pressure chamber compared to the ambient atmosphere surrounding the pressure chamber. This compressor device is specifically configured as a vacuum pump. Therefore, evacuation can be performed under predetermined parameters and in a more reliable manner for the process.

[0017] According to another embodiment, the method further includes reducing the negative pressure difference inside the pressure chamber compared to the ambient atmosphere surrounding the pressure chamber until the pressure inside the pressure chamber corresponds to the pressure of the ambient atmosphere. This ensures that the pressure increase inside the pressure chamber occurs in a controlled manner and that the apparatus disposed therein is not damaged.

[0018] According to one improvement, the step of reducing the negative pressure differential is performed during the step of filling the fluid container, wherein the pressure inside the pressure chamber is always at most the pressure in the storage space. Since the two steps are performed in parallel time, the method as a whole can be accelerated.

[0019] According to another embodiment of the method, the negative pressure difference is compensated during the evacuation step no later than when a target negative pressure of up to 0.5 bar absolute pressure is reached. At this target negative pressure, a vacuum can advantageously be created in the storage space, suitable for residual material in the storage space not to interfere with the required purity of the subsequently filled fluid.

[0020] According to another embodiment, this method is used for the initial filling of a fluid container. In the case of a fluid container that has been pre-filled with the same fluid, a residual overpressure relative to the ambient atmosphere is typically maintained in the fluid container, such that during refilling, no moisture and / or foreign gas permeates into the storage space due to the residual overpressure. This is not the case for a previously empty fluid container, which is why moisture and / or foreign gas (typically air) can be contained in such a fluid container, and moisture and foreign gas must first be reduced during the initial filling.

[0021] According to another embodiment of the method, the fluid contains hydrogen and is introduced into the storage space from a fluid tank connected to the storage space. Hydrogen is used, in particular, as a reactant gas for generating electricity in fuel cells. In this case, the purity of the hydrogen is required to be at least 99.9% by volume, and particularly at least 99.99% by volume.

[0022] According to another embodiment of the method, the fluid container is a Type IV container. Type IV containers are particularly used in fuel cells. These containers are made, for example, of CFRP composite materials, and therefore have a lower weight than conventional containers made of steel or light metals.

[0023] According to one embodiment of the system, the fluid container has a liner configured to seal the storage space of the fluid container in an airtight manner relative to the outside. In this way, the fluid container can be made of a material that is lighter than conventional airtight materials, but lacks the required permeability, and therefore cannot airtightly seal the storage space without the liner.

[0024] According to another embodiment, the system also includes a fluid tank that is fluidly connected to the storage space and configured to introduce fluid into the storage space. The fluid tank can be located inside or outside the pressure chamber. Furthermore, the fluid tank contains, for example, industrial gases such as acetylene, argon, hydrocarbons, oxygen, nitrogen, hydrogen, or carbon dioxide, compressed air, or similar fluids, which may be contained in the fluid tank in a gaseous and / or liquid condensed state. Depending on the appropriate storage conditions of the fluid, the fluid tank may accordingly have insulation and / or cooling devices.

[0025] According to one improvement, the system also includes a controllable multiport valve fluidly connected to the fluid container and configured to switch from a evacuated state to a filled state. In the evacuated state, fluid exchange is allowed between the storage space and the pressure chamber of the fluid container; in the filled state, fluid exchange is allowed between the storage space and the fluid tank. In this configuration, the multiport valve in the corresponding state prevents fluid exchange according to the other states. That is, in the evacuated state, fluid exchange is allowed between the storage space and the pressure chamber of the fluid container, while fluid exchange between the storage space and the fluid tank is blocked. In the filled state, the situation is reversed accordingly. In this configuration, for example, the controllable multiport valve can be electronically connected to a control device.

[0026] However, the present invention is not limited to multi-port valves that can only be configured in the above-described state. Instead, multi-port valves may also include, for example, additional configurations in which the storage space is fluidly isolated from the external environment and / or a pressure sensor is provided.

[0027] In addition, the dimensions of the pressure chamber are set such that, for example, a person can enter the pressure chamber through a lockable door and stand upright inside.

[0028] Furthermore, the pressure chamber may optionally have a connector and / or electronic coupling device for connecting the fluid inside the pressure chamber to the environment, by means of which, for example, external control / power supply can be provided to devices located inside the pressure chamber. Therefore, the pressure chamber can be configured in a compact manner, because in particular, supply devices, control devices, etc., such as fluid tanks, can be located outside the pressure chamber and still be guided to the interior of the pressure chamber when it is closed during operation. Nevertheless, the supply devices mentioned above in an exemplary manner can also be arranged inside the pressure chamber in each case.

[0029] Fluid containers can be selectively positioned inside a pressure chamber manually, automatically, or semi-automatically. For example, one or more fluid containers can be stored on a conveying device and conveyed into the pressure chamber using the conveying device.

[0030] If multiple fluid containers are arranged inside a pressure chamber, their storage spaces can be fluidly connected to the pressure chamber independently of each other, or at least some of them can be fluidly connected together. Fluid coupling between the storage spaces and the pressure chamber can be provided, for example, via a hose conduit system, wherein the hoses of the hose conduit system are specifically implemented as dimensionally stable hoses. Alternatively or additionally, fluid coupling can be provided via a piping system. A negative pressure difference or negative pressure within the pressure chamber relative to the storage space causes fluid to flow from the storage space to the pressure chamber. Since the storage space has no fluid inlet, it is evacuated as long as the negative pressure difference is maintained.

[0031] The target negative pressure is measured, for example, by a barometer, particularly a digital barometer, mercury barometer, tubular barometer, etc. The measured values ​​are selectively displayed in graphical, textual, or mixed formats. Furthermore, the barometer can be electronically coupled to a control device, and the measured values ​​can be transmitted to the control device to monitor / regulate the target negative pressure.

[0032] If appropriate, the above implementation methods and improvements can be combined with each other as needed.

[0033] Further possible embodiments, modifications, and implementations of the invention include combinations of features of the invention not explicitly mentioned in the foregoing or hereinafter described with respect to exemplary embodiments. In particular, those skilled in the art will also add various aspects as improvements or additions to the various basic forms of the invention. Attached Figure Description

[0034] The invention will now be explained in further detail with reference to exemplary embodiments illustrated in the accompanying drawings. In the drawings:

[0035] Figure 1 A flowchart of a method for filling a fluid container according to an exemplary embodiment is shown;

[0036] Figure 2 A schematic diagram of a system for filling a fluid container according to another exemplary embodiment is shown.

[0037] The accompanying drawings are intended to provide a further understanding of embodiments of the invention. They illustrate embodiments and are used in conjunction with the description explaining the principles and concepts of the invention. Other embodiments and numerous advantages mentioned are presented with reference to the drawings. Elements in the drawings are not necessarily shown to scale.

[0038] Unless otherwise stated, in the accompanying drawings, identical, functional, and operational elements, features, and components each have the same reference numerals. Detailed Implementation

[0039] The term "pressure" in this invention refers to absolute pressure, which by definition is pressure relative to zero pressure in an empty space / vacuum.

[0040] In the context of this invention, the liner is the core of the fluid container, forming an internal barrier layer, particularly for fluid containers made of composite materials, to ensure a certain degree of permeability and provide a seal for the fluid container. This thin-walled barrier layer uses materials such as steel, stainless steel, aluminum, or plastic.

[0041] In this invention, a vacuum is a space filled with gas at a pressure lower than that of the ambient atmosphere (air-filled). The following applies: within a finite space, the fewer atoms, the purer the vacuum; an absolutely pure vacuum cannot be produced on Earth using currently available technology. Vacuums are classified as rough vacuum, fine vacuum, high vacuum, and ultra-high vacuum (maximum vacuum) based on pressure level.

[0042] Figure 1 A flowchart of a method V for filling fluid container 1 is shown. Method V is used, for example, for the initial filling of fluid container 1.

[0043] according to Figure 1 In the example, fluid container 1 is a so-called Type IV container made of composite material, for example, for a fuel cell, and has an inner liner. The inner liner is implemented to seal the storage space 3 of fluid container 1 in an airtight manner relative to the outside.

[0044] According to the invention, method V includes step V1 of providing a pressure chamber 2 having a pressure chamber interior 4. The pressure chamber 2, by way of example, substantially corresponds to a so-called decompression chamber having a closable entry door. Optionally, the pressure chamber 2 may also have multiple entry doors or openings. Such a pressure chamber 2 is further implemented as substantially curved in order to advantageously withstand mechanical loads caused by pressure differentials relative to the ambient atmosphere. However, this does not preclude the possibility that a portion of the pressure chamber 2 may be implemented as straight. In this case, the pressure chamber interior 4 is approximately 2 m to approximately 4 m high, and the base area is approximately 5 m². 2 Within the range of up to 200m2, especially in the 10m range 2 Up to 100m 2 Within the range.

[0045] Furthermore, method V includes step V2, which positions the fluid container 1 within the pressure chamber 4 such that the storage space 3 of the fluid container 1 is fluidly connected to the pressure chamber 4. In this case, the fluid container 1 is, for example, located on a transport trolley with rollers. Therefore, while the fluid container 1 is held on the transport trolley, the transport trolley can be easily pushed into the pressure chamber 4 from the outside. Additionally, a controllable multi-port valve 7 is exemplarily attached to the fluid container 1.

[0046] Method V further includes a step V3 of evacuating the pressure chamber 4 to a target negative pressure. In this case, the evacuation V3 is performed such that a negative pressure difference is initially formed in the pressure chamber 4 relative to the storage space 3 due to fluid coupling. The desired target negative pressure is generated, for example, by using a compressor device 6, which is preferably implemented as a vacuum pump. Figure 1 In the example, evacuation step V3 is performed / maintained until the desired target negative pressure is reached, specifically in the range of 0.48 bar to 0.4 bar absolute pressure. When the desired target negative pressure is reached, the compressor unit 6 is throttled, so that the negative pressure difference in the pressure chamber 4 relative to the storage space 3 is compensated again.

[0047] Furthermore, for example, at the start of evacuation step V3, fluid exchange between the storage space 3 of fluid container 1 and the interior 4 of pressure chamber 4 is not permitted. As a result, in the initial stage of evacuation step V3, the pressure difference between storage space 3 and the interior 4 of pressure chamber 4 increases. Therefore, internal pressure can be applied to the liner from the beginning, and a leak test of the liner can be performed by measuring and monitoring the internal pressure in storage space 3.

[0048] Furthermore, after evacuation step V3, according to Figure 1 Method V further includes an optional step V4 of switching from a evacuated state to a filled state. In the evacuated state, fluid exchange is allowed between the storage space 3 of the fluid container 1 and the interior 4 of the pressure chamber. In the filled state, fluid exchange is allowed between the storage space 3 of the fluid container 1 and the fluid tank 5 to which the fluid is connected. For example, a control device controls the switching V4, wherein for this purpose, the control device uses, in particular, the pressure in the interior 4 of the pressure chamber and the pressure in the storage space 3. In this case, the control device sends a corresponding control signal to the controllable multi-port valve 7, for example, via wired and / or wireless means.

[0049] Furthermore, method V includes a step V5 of filling the fluid container 1 by introducing fluid into the storage space 3. For example, the fluid is hydrogen gas with a purity of at least 99.99% by volume, which is introduced into the storage space 3 from a fluid tank 5 that is fluidly connected to the storage space 3.

[0050] Method V may optionally further include a step V6 of reducing the negative pressure differential in the pressure chamber 4 compared to the ambient atmosphere surrounding the pressure chamber 2 until the pressure in the pressure chamber 4 corresponds to the pressure of the ambient atmosphere. Specifically, step V6 of reducing the negative pressure differential is performed during step V5 of filling the fluid container 1. In this case, the pressure in the pressure chamber 4 always includes at most the pressure of the storage space 3, thereby avoiding damage to the liner.

[0051] Figure 2An exemplary schematic diagram of a system 10 for filling a fluid container 1 is shown.

[0052] According to the present invention, system 10 has a fluid container 1, a pressure chamber 2, and a compressor unit 6. Furthermore, system 10, illustrated by way of example, includes an optional fluid tank 5 and an optional controllable multi-port valve 7.

[0053] Pressure chamber 2 includes a pressure chamber interior 4 implemented as a fluid-tight seal. Pressure chamber 2 is implemented in an exemplary manner as a substantially cylindrical shape. Pressure chamber 2 also has at least one entry door. In this case, pressure chamber interior 4 has an internal height of approximately 2 m to approximately 4 m and a bottom area of ​​approximately 5 m². 2 Up to 200m 2 Within the range, especially within 10m 2 Up to 100m 2 Within the range. According to Figure 2 The pressure chamber 2 in the example can also be used with... Figure 1 The features of pressure chamber 2 in the example are combined.

[0054] Fluid container 1 is positioned within pressure chamber 4. Furthermore, the storage space 3 of fluid container 1 is fluidly connected to pressure chamber 4. For example, fluid container 1 has an outlet opening 8 that extends into pressure chamber 4 and can be closed. Figure 2 In the example, fluid container 1 is made of steel or a steel alloy.

[0055] The compressor unit 6 is disposed, for example, outside the pressure chamber 2 and fluidly connected to the pressure chamber 2. The compressor unit 6 is further configured to generate a negative pressure differential within the pressure chamber 4 relative to the storage space 3. Alternatively or additionally, the compressor unit 6 is configured to generate a negative pressure within the pressure chamber 4 compared to the ambient atmosphere surrounding the pressure chamber 2.

[0056] The fluid tank 5 is disposed, for example, outside the pressure chamber 2, and is fluidly connected to the storage space 2. In this case, the fluid tank 5 is fluidly connected to the storage space 3, for example, via a hose conduit 9, wherein the hose of the hose conduit 9 is specifically implemented as a dimensionally stable hose. Alternatively or additionally, the fluid tank 5 may be connected to the storage space 3 via a piping system. Furthermore, the fluid tank 5 is configured to introduce fluid into the storage space 3.

[0057] exist Figure 2 For example, a controllable multi-port valve 7 is fluidly connected to multiple fluid containers 1 and can switch between a evacuation state and a filling state. In the evacuation state, fluid exchange is allowed between the storage space 3 of the fluid container 1 and the interior 4 of the pressure chamber. In the filling state, fluid exchange is allowed between the storage space 3 of the fluid container 1 and the fluid tank 5.

[0058] For example, the fluid is liquid hydrogen, which is stored in fluid tank 5 at a pressure of about 200 bar to 300 bar, and in the filled state, fluid container 1 includes the flow direction into storage space 3 due to the pressure difference relative to storage space 3.

[0059] According to the present invention, Figure 2 The system 10 shown is implemented to achieve according to Figure 1 Examples in the text or methods V that are not described in detail but at least include the basic methodological features of the present invention.

[0060] Although the present invention has been fully described above based on preferred exemplary embodiments, the present invention is not limited thereto and can be modified in various ways.

[0061] List of reference numerals

[0062] 1 fluid container

[0063] 2 pressure chambers

[0064] 3 storage space

[0065] 4. Pressure Chamber Interior

[0066] 5 fluid tanks

[0067] 6 compressor units

[0068] 7-port valve

[0069] 8 Exit Openings

[0070] 9. Flexible hose piping system

[0071] 10 system

[0072] V Method

[0073] V1 provides

[0074] V2 Positioning

[0075] V3 Empty

[0076] V4 switching

[0077] V5 fill

[0078] V6 decreased

Claims

1. A method (V) for filling a fluid container (1), the method comprising the following steps: Provide (V1) a pressure chamber (2) with a pressure chamber interior (4); Position the fluid container (1) (V2) inside the pressure chamber (4) such that the storage space (3) of the fluid container (1) is fluidly connected to the pressure chamber (4). The pressure chamber (4) is evacuated (V3) to the target negative pressure, so that a negative pressure difference is initially formed in the pressure chamber (4) relative to the storage space (3) due to fluid coupling; The process switches from a evacuated state to a filled state, in which fluid exchange is permitted between the storage space of the fluid container and the fluid tank connected to the storage space. as well as The fluid container (1) is filled (V5) by introducing fluid into the storage space (3).

2. The method according to claim 1, characterized in that, The fluid container (1) includes a liner that is configured to seal the storage space (3) of the fluid container (1) in an airtight manner relative to the outside.

3. The method according to claim 1 or 2, characterized in that, During the evacuation (V3) step, fluid exchange between the storage space (3) of the fluid container (1) and the pressure chamber (4) is prevented at least temporarily, causing the pressure difference between the storage space (3) and the pressure chamber (4) to temporarily increase.

4. The method according to claim 1 or 2, characterized in that, The target negative pressure is generated by using a compressor device (6).

5. The method according to claim 1 or 2, characterized in that... Additional steps: Compared with the ambient atmosphere surrounding the pressure chamber (2), the negative pressure difference in the pressure chamber (4) is reduced (V6) until the pressure inside the pressure chamber (4) corresponds to the pressure of the ambient atmosphere.

6. The method according to claim 5, characterized in that, The step of reducing (V6) the negative pressure difference is performed during the step of filling (V5) the fluid container (1), wherein the pressure inside (4) of the pressure chamber always includes at most the pressure in the storage space (3).

7. The method according to claim 1 or 2, characterized in that, The negative pressure difference is compensated in the evacuation (V3) step at the latest when the target negative pressure of up to 0.5 bar absolute pressure is reached.

8. The method according to claim 1 or 2, characterized in that, The method (V) is used for the initial filling of the fluid container (1).

9. The method according to claim 1 or 2, characterized in that, The fluid contains hydrogen and is introduced into the storage space (3) from a fluid tank (5) that is fluidly connected to the storage space (3).

10. The method according to claim 1 or 2, characterized in that, The fluid container (1) is a type IV container.

11. The method according to claim 1, characterized in that, The fluid container is used to operate a hydrogen-powered fuel cell.

12. The method according to claim 9, characterized in that, The fluid is composed of high-purity hydrogen gas.

13. A system (10) for implementing the method (V) according to any one of claims 1 to 12, said system: It has a pressure chamber (2), the pressure chamber including a fluid-sealed pressure chamber interior (4); It has a fluid container (1) positioned within the pressure chamber interior (4), and the storage space (3) of the fluid container is fluidly connected to the pressure chamber interior (4); and It has a compressor unit (6) configured to generate a negative pressure difference relative to the storage space (3) within the pressure chamber (4). in, A fluid tank is provided, which is fluidly connected to the storage space to introduce fluid into the storage space. A controllable multiport valve is provided, which is fluidly connected to the fluid container and is configured to switch from an evacuated state to a filled state, wherein, in the filled state, fluid exchange is permitted between the storage space of the fluid container and the fluid tank.

14. The system according to claim 13, characterized in that, The fluid container (1) includes a liner that is configured to seal the storage space (3) of the fluid container (1) in an airtight manner relative to the outside.

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