Pressure vessel

Abstract

The invention relates to a pressure vessel (10) having the features of claim 1.

Description

[0001] Title: Pressure Container

[0002] Description

[0003] The invention relates to a pressure vessel with features of claim 1.

[0004] Pressure vessels are typically used to store liquids and gases under pressure. The storage capacity of a pressure vessel depends primarily on its internal volume and the pressure it can safely withstand. In addition to storage capacity, the size, internal shape, external shape, and weight of the pressure vessel can also be important in many applications.

[0005] One application of pressure vessels is the storage of compressed hydrogen (H2). Besides battery-powered vehicles, H2 can play a crucial role in the implementation of future-oriented, emission-free propulsion technologies in the automotive, aviation, and shipbuilding industries. H2 generally burns cleaner than gasoline and diesel fuel, leading to a reduction in CO2 emissions.

[0006] In addition to battery electric vehicles (BEVs), fuel cell electric vehicles (FCEVs) are becoming increasingly common due to their advantages, such as lower weight, short refueling times, greater range, and ease of use compared to BEVs. Particularly in commercial vehicles, but not exclusively, significant advantages can be achieved through increased range and very short refueling times. The use of conventional hydrogen cylinders (Type 4) can limit the range of these vehicles, as the installation space of existing vehicle platforms is insufficient for the necessary number of conventional storage cylinders (Type 4) to provide the amount of compressed hydrogen required to achieve range specifications of, for example, 600–900 km.

[0007] The Type 4 storage cylinder essentially consists of a liner. Its function is to prevent hydrogen atoms from diffusing to the outside. The high internal pressure is absorbed by the carbon shell (fiber-resin matrix) wound onto the liner. Due to the large internal surface area of ​​the storage cylinder and the high internal pressure, a thick shell wall is necessary, which in turn results in high weight.

[0008] Particularly in the automotive industry, flat, rectangular geometries are required as installation spaces for energy storage devices. Therefore, the use of cylindrical and round geometries, such as the storage cylinder (Type 4), always results in a significant loss of installation space and a correspondingly lower storage capacity.

[0009] It is therefore an object of the present invention to provide a pressure storage device that eliminates the above disadvantages.

[0010] The above problem is solved by a pressure accumulator with the features of claim 1. The pressure accumulator comprises at least two elongated outer cells. The outer cells are oriented along a longitudinal direction. The pressure accumulator comprises at least one transverse band and at least one longitudinal band. The transverse band surrounds (or wraps) the outer cells at least partially transversely to the longitudinal direction and holds them together, in particular transversely to the longitudinal direction. The longitudinal band surrounds (or wraps) the outer cells at least partially along the longitudinal direction and holds them together, in particular along the longitudinal direction.

[0011] The outer cells of the pressure accumulator are arranged side by side and form a substantially rectangular outer contour, which can correspond to the given rectangular installation space in a vehicle. The pressure vessel can be designed, in particular, for storing compressed gases and / or liquids.

[0012] This allows for a flat geometry, enabling compliance with the installation requirements of a battery-powered vehicle. For example, it allows for a choice between a BEV (chassis in the form of a "skateboard") and an FCEV drive concept based on the same vehicle platform. This enables a "plug and play" system.

[0013] Retrofitting vehicles, for example in the transport sector, to fuel cell or hydrogen combustion engines can reduce CO2 emissions. The pressure vessel and its high adaptability to the available installation space allow for the greatest possible hydrogen storage capacity and range.

[0014] The outer cells (or cells) can each have a cross-section consisting of a first side (outer side or outer half) and a second side (inner side or inner half). The first side (outer side or outer half) can be semicircular. The second side (inner side or inner half) can be formed from two opposing quarter-circle segments connected by a straight line. The second side (inner side or inner half) can have a semi-oval shape. The shape of the second side (inner side or inner half) can vary.

[0015] inner half) is created in particular by pressing a semicircular inner wall of the outer cells against each other and / or against an inner cell (see below).

[0016] The cross-sections of the outer cells can be mirror images of each other.

[0017] The transverse and / or longitudinal band can each be designed to absorb the forces exerted outwards by the internal pressure of the cells. This can, for example, prevent the individual cells and thus the pressure vessel from swelling. The transverse and / or longitudinal band can each be formed as a fiber-resin matrix.

[0018] According to a further development of the pressure vessel, the pressure vessel can have at least one inner cell (or cell), and in particular several inner cells (or cells). The inner cell can be arranged between the outer cells. The inner cell and the outer cells can be arranged side by side in a row. The transverse band can surround (or wrap) the outer cells and the inner cell at least partially transversely to the longitudinal direction and hold them together, in particular transversely to the longitudinal direction. The longitudinal band can surround (or wrap) the outer cells and the inner cell at least partially along the longitudinal direction and hold them together along the longitudinal direction.

[0019] The inner cell can have an oval cross-section. The cross-section of the inner cell can be created by pressing a circular cross-section in from the outside (e.g., through the outer cells) from two opposite sides. The cross-section of the inner cell can have two first opposite sides (top and bottom) and two second opposite sides (left and right). The first opposite sides can each be semicircular with the same radius. The second opposite sides (left and right) can be straight lines (parallel to each other). The two semicircular sides (top and bottom) of the cross-section can each be connected by the straight sides (left and right) of the cross-section.

[0020] This allows multiple cells (outer and inner cells) to be arranged side by side within the pressure vessel, so that the overall contour of the pressure vessel retains a flat, rectangular shape, which is particularly important for installation in a vehicle. The cross-sectional shape of the cells can be optimized to create a large support base perpendicular to the longitudinal direction between the individual cells. This support base can establish a pressure equilibrium between the inner and outer cells, allowing the inner cell to be designed with a thinner wall, as the forces cancel each other out due to the pressure equilibrium.

[0021] According to the invention, the pressure vessel has a first end cap and a second end cap. The outer cells and / or the inner cell are each formed from a pressure tube. The pressure tubes each have a first end and a second end. The first end cap is connected to the first ends of the pressure tubes. The second end cap is connected to the second ends of the pressure tubes. The end caps can seal the pressure tubes gas-tight.

[0022] This allows the outer and inner cells to be implemented using simple means. The end caps and pressure tubes can be wrapped and thus fixed, at least partially, along their length using the longitudinal band. The longitudinal band can absorb the outward force exerted by the internal pressure in the pressure tubes. The longitudinal band can essentially hold the individual cells together in the desired geometric shape (e.g., flat and rectangular). The longitudinal band can be designed to prevent the end caps from shifting when pressure is applied.

[0023] According to a further development of the pressure vessel, the first end cap can have at least two receptacles for receiving the first ends of the pressure tubes. The receptacles of the first end cap can be bonded, welded, and / or joined to the first ends of the pressure tubes. Alternatively or additionally, the second end cap can have at least two receptacles for receiving the second ends of the pressure tubes. The receptacles of the second end cap can be bonded, welded, and / or joined to the second ends of the pressure tubes.

[0024] Hot gas welding (HGS), infrared welding, friction welding and / or ultrasonic welding can be used to weld the mounts of the first and / or the second end cap to the pressure tubes.

[0025] The receptacles of the first end cap and / or the second end cap can each be designed as an internal flange. The first end cap, the second end cap, and the respective receptacles or internal flanges can be manufactured by casting, forging, and / or 3D printing. The first end cap, the second end cap, and the respective receptacles or internal flanges can be designed (in terms of strength) to expand transversely to the longitudinal direction in the same or analogous way as the pressure tubes. The connection between the receptacles and the respective ends of the pressure tubes can be gas-tight.

[0026] This allows the end caps to be connected to the pressure tubes, thus enabling the external cells or the internal cell to be implemented using simple means.

[0027] According to a further development of the pressure vessel, at least one channel can be arranged between two adjacent receptacles of the first end cap and / or the second end cap. The channel can be configured to fluidically connect two adjacent pressure tubes.

[0028] In this context, a fluidic connection or fluidic coupling means that a gas and / or a liquid (fluid) can flow between two fluidically coupled elements or between two elements in fluidic connection.

[0029] This allows the pressure to be distributed evenly between the individual pressure tubes or between the outer cells and the inner cell. Local pressure peaks, which could lead to local overloading of the pressure vessel cells, can be avoided.

[0030] According to a further development of the pressure vessel, the first end cap can have a through-opening. The through-opening can be designed as a threaded bore. The thread of the threaded bore can be designed to provide a seal. A gasket (flat gasket) can be arranged in or on the through-opening. The gasket can be made of, for example, PCTFE (polychlorotrifluoroethylene), ECTFE (ethylene chlorotrifluoroethylene), PEA (perfluoroalkoxy polymer), UHMW-PE (ultra-high-molecular-weight polyethylene), and / or organically filled PTFE (polytetrafluoroethylene).

[0031] A valve for connecting the pressure vessel can be arranged or installed in the through-opening of the first end cap. The valve can facilitate fluid communication between the cells of the pressure vessel and the environment or the element connected via the valve (e.g., consumer, inlet, etc.). The valve can be configured to detect or monitor temperature, pressure (especially internal pressure), and / or flow velocity. The valve can be configured to trigger a safety device if the permissible values ​​of the detected or monitored temperature, pressure (internal pressure), and / or flow velocity are exceeded. The safety device can be configured to allow discharge and / or pressure relief from the pressure vessel. The safety device can be an integral part of the pressure vessel.

[0032] This allows a valve to be implemented in the pressure vessel using simple means, thus enabling fluid communication with the pressure vessel.

[0033] According to a further development of the pressure vessel, the second end cap can have a through-opening. The through-opening can be designed as a threaded bore. A blanking plug can be arranged or installed in the through-opening of the second end cap.

[0034] The first and second end caps can be identical except for the valve or blanking plug. This allows the first and second end caps to be interchangeable. This simplifies the manufacturing of the pressure vessel, as different end caps do not need to be produced. The first and second end caps can differ only in that the first end cap contains a valve and the second end cap contains a blanking plug. The blanking plug can be opened during filling (e.g., initial filling) of the pressure vessel with a storage fluid, allowing the pressure tubes or the pressure vessel to be completely purged. After purging, the blanking plug can seal the second end cap gas-tight.

[0035] This simplifies the production of the end caps and thus the pressure vessel, as it eliminates the need to manufacture different end caps.

[0036] According to a further development of the pressure vessel, the first end cap, the second end cap and / or their receptacles can each be made at least partially of austenitic stainless steel, of aluminum with at least partial plastic coating, in particular polyamide coating, of thermoplastic, of thermoset and / or of nanoparticle-reinforced high-performance plastic.

[0037] This allows for the implementation of end caps that meet the requirements of the pressure tubes and the gas and / or liquid or fluid stored within the pressure tubes and the associated pressure.

[0038] According to a further development of the pressure vessel, the first end cap and / or the second end cap can be flat on their respective sides facing away from the pressure tubes. In particular, the respective sides of the first and second end caps facing away from the pressure tubes can be parallel to each other. This allows the essentially planar and rectangular overall shape or geometry of the pressure vessel to be maintained even at the ends of the cells or pressure tubes of the pressure vessel.

[0039] According to a further development of the pressure vessel, the pressure vessel can have at least one filling element. The filling element can be arranged in a space between the pressure tubes and the transverse belt and / or the longitudinal belt and fill this space at least partially, and in particular completely. The filling element can be made of an elastomer. The filling element can be in the form of an insert wedge. The filling element can be configured to transfer the tangential forces of the respective cells to the transverse belt and / or longitudinal belt. The filling element can be one-piece and / or integrally formed. The filling element can have an elastomer coating to compensate for tolerances.

[0040] The geometry of the outer cells and / or the inner cell can be chosen such that the space between them is as small as possible. The space between them can have a substantially triangular cross-section.

[0041] This allows the pressure distribution within the pressure vessel to be further optimized and the essentially planar and rectangular overall shape or geometry of the pressure vessel to be maintained.

[0042] It is also conceivable to fill the gap by wrapping it longitudinally with a fiber-resin matrix. This allows the gap to be filled completely and the pressure vessel to be stabilized as effectively as possible.

[0043] According to a further development of the pressure vessel, the filling element can be arranged in two opposing spaces. The filling element can fill the two spaces at least partially, and in particular completely. The filling element can be formed in one piece and / or as a single component. The filling element can be designed as a tie rod. The filling element can have a cross-sectional shape consisting essentially of two triangles, each with one vertex pointing towards the other.

[0044] The filling element can have two rods. Each of the two rods can be designed as a threaded rod. A first rod can be arranged in a first space. A second rod can be arranged in a second space opposite the first. The two rods can each be connected at their ends to the two end caps, in particular by means of a screw connection (e.g., screwed together). The filling element can include nuts for this purpose.

[0045] The filling element can be made of a fiber-reinforced plastic composite. The two rods can be wrapped with the fiber-reinforced plastic composite and then formed (e.g., pressed) into the desired shape. In other words, the filling element can be formed or manufactured by wrapping the fiber-reinforced plastic composite and then forming (e.g., pressing) it into the desired shape. The fiber-reinforced plastic composite can be cured under pressure and temperature to maintain the desired shape. The filling element can have an elastomer coating, particularly to compensate for tolerances (size tolerances between the pressure tubes) from simultaneous...

[0046] This allows tensile forces along the longitudinal direction and / or forces perpendicular to the longitudinal direction to be absorbed and / or evenly distributed by means of the filling element. The pressure distribution within the pressure vessel can thus be further optimized, and the essentially planar and rectangular overall shape or geometry of the pressure vessel can be maintained.

[0047] According to a further development of the pressure vessel, the longitudinal belt can be arranged in an intermediate space between the pressure tubes and the transverse belt and fill this intermediate space at least partially.

[0048] This allows the pressure distribution within the pressure vessel to be further optimized, and essentially the planar and rectangular overall shape or geometry of the pressure vessel can be maintained, eliminating the need for additional and separate elements.

[0049] According to a further development of the pressure vessel, the pressure tubes can be designed or manufactured as wound pressure tubes (wound tubes), in particular endless ones. The winding can be designed such that the fiber is stressed in the main tensile direction.

[0050] This allows the pressure tubes to be manufactured quickly, cost-effectively, and using simple means. This has a positive effect on the entire pressure vessel. According to a further development of the pressure vessel, the pressure tubes can have an inner liner. The inner liner can be designed as a liner. The inner liner can be made of a material that prevents hydrogen diffusion through the inner liner. The material can be a plastic, especially polyamide, and / or a metal. The inner liner can be resistant to hydrogen embrittlement.

[0051] This prevents hydrogen from escaping the pressure vessel using simple means.

[0052] According to a further development of the pressure vessel, the pressure tubes, the transverse belt and / or the longitudinal belt can be made of a fiber-reinforced plastic composite.

[0053] This allows the pressure tubes, the transverse belt and / or the longitudinal belt to be manufactured stably, quickly and cost-effectively using simple means. This has a positive effect on the entire pressure vessel.

[0054] According to a further development of the pressure vessel, the fiber of the fiber-reinforced plastic composite can be made of glass fiber, carbon fiber, aramid, bio-based fiber, graphene, basalt and / or synthetically produced spider silk.

[0055] This allows the fiber-reinforced composite, and thus the pressure tubes, transverse belt, and / or longitudinal belt, to be flexibly adapted to the desired requirements. According to a further development of the pressure vessel, the plastic of the fiber-reinforced composite can be a thermoplastic, thermoset, and / or nanoparticle-reinforced high-performance plastic.

[0056] This allows the fiber-reinforced plastic composite, and thus the printing tubes, the transverse belt and / or the longitudinal belt, to be flexibly adapted to the desired requirements.

[0057] According to a further development of the pressure vessel, the longitudinal belt can be arranged above the transverse belt. It is also conceivable that the longitudinal belt can be arranged below the transverse belt.

[0058] This allows for the most optimal pressure distribution in pressure vessels.

[0059] According to a further development of the pressure vessel, the transverse belt and / or the longitudinal belt can each be designed as a wound belt. The transverse belt and / or the longitudinal belt can each be applied to the cells of the pressure vessel using a winding process. The winding of the transverse belt and / or the longitudinal belt can each be designed such that the fiber is stressed in the principal tensile direction. In particular, the transverse belt is not connected to the longitudinal belt in order to prevent the transmission of transverse forces to the longitudinal belt or its fibers.

[0060] This allows the transverse and / or longitudinal belt to be produced quickly, cost-effectively, and using simple means. This has a positive effect on the entire pressure vessel. Further features, details, and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. The drawings show:

[0061] Fig. 1 a perspective view of a pressure vessel;

[0062] Fig. 2 shows a sectional view through the pressure vessel according to Figure 1 transverse to a longitudinal direction;

[0063] Fig. 3 shows a sectional view through the pressure vessel according to Figure 1 along the longitudinal direction;

[0064] Fig. 4 shows a section of another sectional view through the pressure vessel according to Figure 1 along the longitudinal direction;

[0065] Fig. 5 shows a perspective view of a filling element of the pressure vessel;

[0066] Fig. 6 shows a cross-section through the pressure vessel with the filling element according to Figure 5.

[0067] In the following description and in the figures, corresponding components and elements are represented as follows:

[0068] Reference symbols. For the sake of clarity, not all reference symbols are shown in all figures.

[0069] Figure 1 shows a perspective view of a

[0070] Pressure vessel 10. The pressure vessel 10 comprises at least two elongated outer cells 12. The outer cells 12 extend along a longitudinal direction 14. In other words, the outer cells 12 are oriented along the longitudinal direction 14.

[0071] The pressure vessel 10 comprises at least one transverse band 16 and at least one longitudinal band 18. The transverse band 16 surrounds the outer cells 12 at least partially transversely to the longitudinal direction 14 and holds them together. The longitudinal band 18 surrounds the outer cells 12 at least partially along the longitudinal direction 14 and holds them together.

[0072] Figure 2 shows a sectional view through the pressure vessel 10 according to Figure 1 transverse to the longitudinal direction 14 .

[0073] The pressure vessel 10 can comprise at least one inner cell 20. The inner cell 20 can be arranged between the outer cells 12. The inner cell 20 and the outer cells 12 can be arranged side by side in a row. The transverse band 16 can surround the outer cells 12 and the inner cell 20 at least partially transversely to the longitudinal direction 14 and hold them together. The longitudinal band 18 can surround the outer cells 12 and the inner cell 20 at least partially along the longitudinal direction 14 and hold them together. In this case, the pressure vessel 10 has several inner cells 20.

[0074] The pressure vessel 10 can have at least one filling element 40. The filling element 40 can be arranged in a space 42 between the cells 12, 20 (or their pressure tubes 26, see below) and the transverse band 16 or the longitudinal band 18. The filling element 40 can fill the space 42 at least partially, and in particular completely. The filling element 40 can be made of an elastomer. For clarity, only two filling elements 40 are shown in Figure 2.

[0075] Figure 3 shows a sectional view through the pressure vessel 10 according to Figure 1 along the longitudinal direction 14. In this case, the section runs along the longitudinal direction 14 and through one of the two outer cells 12 of the pressure vessel 10.

[0076] The pressure vessel 10 can have a first end cap 22 and a second end cap 24. The outer cells 12 and / or the inner cell 20 can each be formed from pressure tubes 26 with a first end 28 and a second end 30. The first end cap 22 can be connected to the first ends 28 of the pressure tubes 26. The second end cap 24 can be connected to the second ends 30 of the pressure tubes 26.

[0077] The first end cap 22 can have at least two receptacles 32 for receiving the first ends 28 of the pressure tubes 26.

[0078] The second end cap 24 can have at least two receptacles 32 for receiving the second ends 30 of the pressure tubes 26. The receptacles 32 of the first end cap 22 and / or the second end cap 24 can be bonded, welded, and / or joined to the respective ends 28, 30 of the pressure tubes 26. In this case, the receptacles 32 are each designed as an inner flange.

[0079] The first end cap 22 can have a through-opening 36. The through-opening 36 can be designed as a threaded bore. A valve 38 for connecting the pressure vessel 10 can be arranged or arranged in the through-opening 36 of the first end cap 22. In this case, the valve 38 is screwed into the through-opening 36, which is designed as a threaded bore.

[0080] The second end cap 24 may have a through-opening 36 (not shown). The through-opening 36 may be designed as a threaded bore. A blind plug (not shown) may be arranged or can be arranged in the through-opening 36 of the second end cap 24.

[0081] The first end cap 22, the second end cap 24 and / or their receptacles 32 can each be made at least partially of an austenitic stainless steel, of aluminum with at least a partial plastic coating, in particular a polyamide coating, of thermoplastic, of thermoset and / or of nanoparticle-reinforced high-performance plastic.

[0082] The first end cap 22 and / or the second end cap 24 can be flat on their respective sides facing away from the pressure tubes 26. In particular, the respective sides of the first end cap 22 and the second end cap 24 facing away from the pressure tubes 26 can be parallel to each other.

[0083] The longitudinal belt 18 can be arranged in an intermediate space 42 (see Figure 2) between the cells 12, 20 or their pressure tubes 26 and the transverse belt 16 and fill this space at least partially, in particular completely.

[0084] The pressure tubes 26 can have an inner liner 44. The inner liner 44 can be made of a material that prevents hydrogen diffusion through the inner liner 44. The material can be plastic, in particular polyamide, and / or metal.

[0085] The pressure tubes 26 can be designed as, in particular endless, wound pressure tubes.

[0086] The transverse band 16 and / or the longitudinal band 18 can each be designed as a wound band.

[0087] The pressure tubes 26, the transverse belt 16 and / or the longitudinal belt 18 can be made of a fiber-reinforced plastic composite.

[0088] The fiber of the fiber-reinforced plastic composite can be made of glass fiber, carbon fiber, aramid, bio-based fiber, graphene, basalt and / or synthetically produced spider silk.

[0089] The plastic material of the fiber-reinforced plastic composite can be a thermoplastic, thermoset and / or nanoparticle-reinforced high-performance plastic.

[0090] The longitudinal band 18 is arranged above the transverse band 16. It is also conceivable that the transverse band could be arranged above the longitudinal band 18.

[0091] Figure 4 shows a section of another sectional view through the pressure vessel 10 according to Figure 1 along the longitudinal direction 14. The section shown is oriented perpendicular to the section in Figure 3 through the pressure vessel 10. For clarity, the valve 38 is not shown here, so that the through-opening 36 of the first

[0092] End cap 22 is free.

[0093] Between two adjacent receptacles 32 of the first end cap 22 and / or the second end cap 24, at least one channel 34 can be arranged. The channel 34 can fluidically connect two adjacent pressure tubes 26. Thus, despite a gas-tight cover of the pressure tubes 26, fluid communication and therefore pressure equalization between the individual cells 12, 20 or the pressure tubes 26 of the pressure vessel 10 can take place by means of the first end cap 22 and / or the second end cap 24.

[0094] Figure 5 shows a perspective view of the filling element 40 of the pressure vessel 10. Figure 6 shows a cross-section through the pressure vessel 10 with the filling element 40 according to Figure 5. The filling element 40 shown differs from the filling element 40 shown in Figure 2 in the following ways:

[0095] The filling element 40 can be arranged in two opposing spaces 42 and fill them at least partially, and in particular completely. The filling element 40 can have a cross-sectional shape consisting essentially of two triangles, each with one vertex pointing towards the other. The two triangles can be connected to each other by means of a web 35.

[0096] Within the triangles, i.e., in each of the two opposing spaces 42, a rod 37 can be arranged. The two rods 37 can be connected at their respective ends to the end caps 22, 24, in particular by screwing them together. In this case, the rods 37 are designed as threaded rods that can be screwed to the respective end caps 22, 24 by means of nuts 39. This allows tensile forces along the longitudinal direction 14 to be absorbed and / or distributed evenly. Forces transverse to the longitudinal direction 14 can also be absorbed and / or distributed. The overall pressure distribution within the pressure vessel 10 can thus be further optimized.

[0097] The two rods 37 can be wrapped using a fiber-reinforced plastic composite and then, for example, pressed into the desired shape shown in Figures 5 and 6.

[0098] For the sake of clarity, Figure 6 does not show the longitudinal band 18 as well as the first and second end caps 22 and 24.

[0099] The filling element 40 shown in Figures 5 and 6, as well as the filling element 40 shown in Figure 2, can each be formed in one piece and / or as a single component. It is also conceivable that the filling element 40 shown in Figures 5 and 6, as well as the filling element 40 shown in Figure 2, can each have an elastomer coating to accommodate tolerances arising from simultaneous [unclear - possibly "consistencies"].

Claims

Patent claims 1. Pressure vessel (10) comprising: at least two elongated outer cells (12) wherein the outer cells (12) are oriented along a longitudinal direction (14), at least one transverse band (16) wherein the transverse band (16) surrounds and holds together the outer cells (12) at least partially transversely to the longitudinal direction (14), at least one longitudinal band (18) wherein the longitudinal band (18) surrounds and holds together the outer cells (12) at least partially along the longitudinal direction (14), wherein the pressure vessel (10) has a first end cap (22) and a second end cap (24), wherein the outer cells (12) are each formed from pressure tubes (26) having a first end (28) and a second end (30), wherein the first end cap (22) is connected to the first ends (28) and the second end cap (24) is connected to the second ends (30) of the pressure tubes (26).

2. Pressure vessel (10) according to claim 1, characterized in that the pressure vessel (10) has at least one inner cell (20), wherein the inner cell (20) is arranged between the outer cells (12), wherein the inner cell (20) and the outer cells (12) are arranged side by side in a row, wherein the transverse band (16) surrounds and holds together the outer cells (12) and the inner cell (20) at least partially transversely to the longitudinal direction (14), wherein the longitudinal band (18) surrounds and holds together the outer cells (12) and the inner cell (20) at least partially along the longitudinal direction (14).

3. Pressure vessel (10) according to claim 1 or 2, characterized in that the first end cap (22) has at least two receptacles (32) for receiving the first ends (28) and / or the second end cap (24) has at least two receptacles (32) for receiving the second ends (30) of the pressure tubes (26), wherein the receptacles (32) of the first end cap (22) and / or the second end cap (24) are bonded, welded and / or joined to the respective ends (28, 30) of the pressure tubes (26), in particular wherein the receptacles (32) are each designed as an inner flange.

4. Pressure vessel (10) according to claim 3, characterized in that at least one channel (34) is arranged between two adjacent receptacles (32) of the first end cap (22) and / or the second end cap (24), which fluidically connects two adjacent pressure tubes (26).

5. Pressure vessel (10) according to one of the preceding claims, characterized in that the first end cap (22) has a through-opening (36), in particular a threaded bore, wherein a valve (38) for connecting the pressure vessel (10) is arranged or can be arranged in the through-opening (36) of the first end cap (22).

6. Pressure vessel (10) according to one of the preceding claims, characterized in that the second end cap (24) has a through-opening (36), in particular a threaded bore, wherein a blind plug is arranged or can be arranged in the through-opening (36) of the second end cap (24).

7. Pressure vessel (10) according to one of the preceding claims, characterized in that the first end cap (22), the second end cap (24) and / or their receptacles (32) are each at least partially made of austenitic stainless steel, aluminum with at least a partial plastic coating, in particular polyamide coating, thermoplastic, thermoset and / or nanoparticle-reinforced high-performance plastic.

8. Pressure vessel (10) according to one of the preceding claims, characterized in that the first end cap (22) and / or the second end cap (24) are flat on their respective sides facing away from the pressure tubes (26).

9. Pressure vessel (10) according to one of the preceding claims, characterized in that the pressure vessel (10) has at least one filling element (40), wherein the filling element (40) is arranged in an intermediate space (42) between the pressure tubes (26) and the transverse band (16) and / or the longitudinal band (18) and fills this space at least partially, in particular wherein the filling element (40) is made of an elastomer.

10. Pressure vessel (10) according to claim 9, characterized in that the filling element (40) is arranged in two opposing spaces (42) and fills these at least partially, in particular wherein the filling element (40) is formed in one piece.

11. Pressure vessel (10) according to one of the preceding claims, characterized in that the longitudinal belt (18) in a space (42) between the pressure tubes (26) and the transverse band (16) and fills it at least partially.

12. Pressure vessel (10) according to one of the preceding claims, characterized in that the pressure tubes (26) are designed as, in particular, endlessly wound pressure tubes.

13. Pressure vessel (10) according to one of the preceding claims, characterized in that the pressure tubes (26) have an inner shell (44) wherein the inner shell (44) is made of a material, in particular a plastic, in particular polyamide, and / or metal, which prevents hydrogen from diffusing through the inner shell (44).

14. Pressure vessel (10) according to one of the preceding claims, wherein the pressure tubes (26), the transverse belt (16) and / or the longitudinal belt (18) are formed from a fiber-reinforced plastic composite.

15. Pressure vessel (10) according to claim 14, characterized in that the fiber of the fiber-reinforced plastic composite is formed as glass fiber, carbon fiber, aramid, bio-based fiber, graphene, basalt and / or synthetically produced spider silk.

16. Pressure vessel (10) according to claim 14 or 15, characterized in that the plastic of the fiber-reinforced plastic composite is designed as a thermoplastic, thermoset and / or nanoparticle-reinforced high-performance plastic.

17. Pressure vessel (10) according to one of the preceding claims, characterized in that the longitudinal belt (18) is arranged above the transverse band (16).

18. Pressure vessel (10) according to one of the preceding claims, characterized in that the transverse band (16) and / or the longitudinal band (18) are each formed as a coiled band.

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