Pressure Vessel Assembly and Automotive

Abstract

The technology disclosed herein, in accordance with the present invention, relates to a pressure vessel assembly (10) in which flat sections (16, 18) of a longitudinal end (14) of a pressure vessel (12) are held parallel to mounting rails (21, 22) to allow limited movement of the longitudinal end (14). The technology disclosed herein, in accordance with the present invention, further relates to a motor vehicle including such a pressure vessel assembly (10).

Description

[Technical field]

[0001] The technology disclosed herein relates to pressure vessel assemblies as well as motor vehicles including such pressure vessel assemblies. [Background technology]

[0002] The pressure vessel assembly typically has one or more pressure vessels that can be used to store a gaseous fuel. For example, the gaseous fuel can be natural gas or hydrogen. It is increasingly required for the pressure vessel assembly to be able to be installed in a mounting space that is not normally used in the past, for example, in the underfloor space under the passenger compartment of a motor vehicle, so that it can be used in as many different vehicles as possible, for example, instead of a battery storage device as envisaged. Summary of the Invention [Problem to be solved by the invention]

[0003] A priority objective of the technology disclosed herein is to at least reduce or eliminate the disadvantages of already known solutions or to propose alternative solutions. In particular, a priority objective of the technology disclosed herein is to provide a pressure vessel assembly exhibiting improved resistance to side impact events. Further priority objectives may become evident from the advantageous effects of the technology disclosed herein. These objectives are achieved by the subject matter of the independent claims. The dependent claims form preferred configurations. [Means for solving the problem]

[0004] The technology disclosed herein relates to a pressure vessel assembly comprising: (i) one or more pressure vessels; (ii) one or more mounting rails; (iii) one or more support shells; and (iv) one or more centering elements. One, some, or all of the support shells are attached to one or more mounting rails. One, some, or all of the pressure vessels have at least one flat section and are held by a centering element in the support shells such that the flat section is at an angle of up to 5° relative to the mounting rail to which the support shell is attached. The centering element allows limited relative movement of the pressure vessel's longitudinal ends with respect to the mounting rails, at least parallel to the mounting rails.

[0005] In the pressure vessel assembly as just described, the pressure vessels also have a certain degree of mobility relative to the mounting rail, due to the certain degree of mobility provided by the centering elements, which allows the pressure vessels to be able to move away with a certain degree of mobility and possibly even support each other, for example in the event of a side impact, which may result in a force action at least substantially parallel to the mounting rail.

[0006] The mounting rail may in particular be a rail extending in the longitudinal direction. This rail may in particular define a longitudinal direction. In particular the cross section may be constant or at least substantially constant in the longitudinal direction. The support shell may in particular be used to mount the pressure vessel to the mounting rail via a centering element. The support shell may in particular have an at least approximately rectangular shape, in particular when viewed from the side. The centering element may in particular determine the position of the pressure vessel relative to the support shell, while, as mentioned, allowing a certain degree of relative movement. This does not necessarily mean, but can mean, that the pressure vessel is respectively held exactly in the center.

[0007] A flat section of the pressure vessel can in particular define the relationship to the mounting rail better than a rounded section, which in turn can better define and assist the mobility along the respective longitudinal direction. The flat section can in particular be configured as a flat surface or at least approximately flat surface.

[0008] Basically, the pressure vessel assembly may only have one pressure vessel, one mounting rail, one support shell and one centering element. Typically, however, there is a plurality of each of these elements. For example, several pressure vessels may be arranged next to each other, in particular with their longitudinal axes parallel to one another. Such a pressure vessel assembly may be advantageously integrated, in particular, into the underfloor space of a motor vehicle.

[0009] Preferably, at one, some or each longitudinal end, a further flat section is formed opposite the flat section and parallel to it, whereby stabilization can advantageously be achieved on both sides, for example on the upper and lower sides.

[0010] According to an advantageous configuration, one, some or all of the support shells are split into a first part and a second part, which allows for easy assembly of the pressure vessel assembly and also for easy disassembly for intentional removal of the pressure vessel, for example for inspection purposes.

[0011] The separation line between the first and second parts may in particular be parallel to the flat section, which allows for a simple and practical construction.

[0012] One, some or all of the centering elements may in particular further allow a limited relative movement of the longitudinal ends of the pressure vessel relative to the mounting rail in a transverse direction relative to the mounting rail. This allows an additional limited mobility, so that the relative mobility is not only in the longitudinal direction but also in a transverse direction relative to the longitudinal direction. This allows a two-dimensional support of the movement, so that for example a certain degree of springiness against vibrations is possible and possible pressures acting, for example due to a crash event, can be better avoided. The mobility in the transverse direction relative to the mounting rail may in particular be provided transverse to the longitudinal direction of the pressure vessel. Whether or not the mobility in the longitudinal direction of the pressure vessel is also provided may depend in particular on whether a fixed or a movable support is provided.

[0013] In particular, one, some or all of the centering elements can be made of an elastic material, which makes it possible to easily realize the limited mobility already mentioned. The elastic material can in particular be deformable after a certain pressure. The elastic material returns to its starting state when the pressure application ends.

[0014] One, some or all of the centering elements may in particular have one or more target breaking points for enabling the relative movement, in which case it is possible to envisage an irreversible deformation of the centering elements, so that the target breaking points break when pressure is applied, thereby enabling the relative movement, without an automatic return to the starting state being envisaged, thereby providing flexibility in the case of, for example, a crash event, which typically requires a subsequent inspection of the pressure vessel assembly in any case.

[0015] One, some or all of the centering elements may in particular have a flat section held parallel to the mounting rail, whereby a simple construction can be achieved which allows in particular advantageous mobility along the longitudinal direction.

[0016] According to an advantageous configuration, one, some or all of the support shells are attached to one, two or more mounting rails by means of one, two or more screwed bolts. In particular, all of the support shells may be attached to two mounting rails by means of two screwed bolts each. In this case, typically, the two mounting rails are parallel to one another and a number of support shells are attached to both mounting rails. Typically, two mounting rails are provided for each longitudinal end of the pressure vessel adjacent to one another.

[0017] An upper first mounting rail may in particular be arranged above the first longitudinal end of the pressure vessel, and a lower first mounting rail may in particular be arranged below the first longitudinal end of the pressure vessel, the support shell for holding the first longitudinal end being attached both to the upper first mounting rail and to the lower first mounting rail. This allows for an advantageous and simple attachment of the first longitudinal ends, which may for example be arranged next to each other, by means of both first mounting rails. The mounting rail may for example be attached to the body of a motor vehicle.

[0018] The support shell for the first longitudinal end of the pressure vessel and the centering element can in particular form a fixed support at which the pressure vessel is prevented from being displaced in the axial direction, while the previously mentioned mobility remains maintained at the same time both in the longitudinal direction of the mounting rail and transversely to the mounting rail.

[0019] In particular, an upper second mounting rail may be arranged above the second longitudinal end of the pressure vessel and a lower second mounting rail may be arranged below the second longitudinal end of the pressure vessel. A support shell for holding the second longitudinal end may be attached both to the upper second mounting rail and to the lower second mounting rail. This allows support of the second longitudinal ends, which may also be arranged next to each other, for example, in adjacent pressure vessels, similar to what has already been described for the first longitudinal ends.

[0020] The support shell and the centering element for the second longitudinal end of the pressure vessel may in particular form a movable support, which in particular allows axial mobility of the respectively held pressure vessel and thus allows length compensation, which may be necessary, for example, if the pressure vessel expands or contracts due to, for example, pressure or temperature fluctuations.

[0021] One, some or all of the second longitudinal ends can in particular be formed with axial play relative to the centering element, as a result of which a movable support can be advantageously realized.

[0022] The axial play can in particular be provided by one or more flat sections being axially longer than the surrounding centering element, which allows for a simple realization of the axial play without impairing the reliable support of the pressure vessel and the already mentioned mobility.

[0023] The pressure vessel assembly may in particular comprise a number of pressure vessels with longitudinal axes which may be oriented parallel to one another. This allows for example advantageous utilization of flat installation space, for example underfloor space of a motor vehicle below the passenger compartment. Depending on the desired specific configuration, such underfloor space may alternatively be provided, for example in a motor vehicle, for accommodating battery cells or even the pressure vessel assembly. The use of a number of pressure vessels allows each pressure vessel to be made smaller, in particular with a smaller diameter, and nevertheless achieve a high storage capacity for gaseous fuels with good utilization of the configuration space.

[0024] In particular, immediately adjacent pressure vessels may have a minimum spacing of 2 mm to 4 mm from each other, which has been found to be advantageous since the pressure vessels do not contact each other during normal operation but can adequately support each other in the event of a side impact.

[0025] The minimum spacing may be a spacing that is not to be underestimated, particularly when determining the spacing between each location in one pressure vessel and each location in the other pressure vessel.

[0026] The flat section may in particular be oriented parallel to the longitudinal axis of the pressure vessel, which allows for a simple construction and definition of the displaceability. The same applies for the further flat section.

[0027] One, some or all of the centering elements may in particular be configured to clamp one or two flat sections, thereby allowing a secure holding of the respective pressure vessel.

[0028] In one, some or all of the mounting rails, in particular transverse to the longitudinal extension of these mounting rails, one or more recesses may be formed which constitute a target breaking point in the event of a load in the longitudinal extension. Thus, a defined breaking of the mounting rail is possible in the event of a load in the longitudinal extension, i.e., for example, in the event of a side impact. This prevents undesirable further damage. In particular, the pressure vessel assembly may be installed such that the longitudinal extension of the pressure vessel lies parallel to the longitudinal axis of the vehicle. The longitudinal axis of the vehicle is typically the axis along which the vehicle moves with the steered wheels in a straight line. In this case, the just-described configuration of the target breaking point in the mounting rails, which are typically arranged in the vehicle transversely and horizontally to the longitudinal direction, makes it possible to achieve a defined reaction of the mounting rail in particular in the event of a side impact.

[0029] The technology disclosed herein further relates to a motor vehicle comprising a pressure vessel assembly as described herein. With respect to the pressure vessel assembly, all of the configurations and variations described herein may be utilized.

[0030] In other words, in known pressure vessel assemblies in vehicles, the pressure vessel assembly is typically formed by a so-called neck-mounted support. In this case, a boss, typically made of metal, is clamped by two shell-shaped support shells, which are screwed to another structure. When the support shells are clamped form-fittingly, no movement of the vessel is permitted as required. This leads to problems in the form of tolerance variations during assembly and overloads in abnormal cases. For example, if the pressure vessel is subjected to a crash load transverse to the axis, more or less large loads will be generated at the joint between the boss and the CFK material, since bending and transverse forces are introduced here. This area is relatively sensitive compared to the cylindrical part of the vessel.

[0031] In particular, therefore, the support shell no longer has to be shell-like, but can be linear or flat. For this purpose, a boss is formed that is flattened on two opposite sides. In this flat section, the boss can be clamped with an appropriate force. The linear support element can be expanded laterally in the not yet flattened rounded area of ​​the boss so that a suitable elastic or deformable jaw element can be attached. This jaw element can center the boss during assembly, but allows a certain degree of error adjustment and displacement in the event of overload.

[0032] In particular, it may be specified that the linear clamping jaws allow a partial displacement of the tank suspension. The displacement range can be influenced by the length of the support shell. The loosening forces in the lateral direction can be influenced by forming the centering elements, for example, from elastomers or deformable plastics. The loosening prevention can also be achieved by a suitable configuration of the clamping jaws, for example with a target breaking element. Various other support shapes (for example C-shaped) are also possible for enclosing the flat boss area. The upper and lower shells can be screwed to the cross member in one step. In one example, the peak load can be taken by displacing the first pressure vessel or tank, for example by 3 mm. In this case, the pressure vessel comes into contact with the nearest pressure vessel, and the pure bending load can again be somewhat reduced. If a further load is applied between the support points, the profile can be collapsed by a suitable starting recess in the transverse profile or mounting rail. A load can be applied to another pressure vessel. In this case, first the support device can slide, and then repeated folding of the transverse profile can be achieved. This reduces the overall impact energy further. This can be done until all pressure vessels are in close contact with each other and then in contact with the sill opposite the butt. By appropriately adjusting the width of the bosses and the supporting shells, the appropriate misalignment of the bosses in the axial direction can also be compensated for between the pressure vessels.

[0033] A pressure vessel assembly may in particular be interpreted as a structural unit. A pressure vessel assembly may in particular comprise a pressure vessel together with permanently attached structural support means, mounting elements and protection mechanisms (e.g. shields, barriers, sheaths and coatings), which can only be removed and reinstalled under the use of special tools and / or special methods, e.g. for maintenance or inspection purposes.

[0034] The pressure vessel assembly may in particular be provided for a motor vehicle (e.g. passenger car, motorcycle, commercial vehicle). The pressure vessel assembly may be used for storing a gaseous fuel under ambient conditions. The pressure vessel assembly may for example be used in a motor vehicle operated by compressed natural gas (also called compressed natural gas or CNG) or liquefied natural gas (also called liquid natural gas or LNG) or hydrogen. The pressure vessel assembly may in particular be fluidly connected to at least one energy converter configured to convert the chemical energy of the fuel into another energy form.

[0035] The pressure vessel may be formed, for example, as a composite overwrap pressure vessel. The pressure vessel may be, for example, a cryogenic pressure vessel or a high pressure gas vessel. In particular, the pressure vessel used herein may be a type IV pressure vessel. This may in particular mean that the CFK is wrapped around an inner support structure, in particular a liner. The liner is typically formed from a thermoplastic. The pressure vessel may be closed at each end by a metallic "boss", which may also be partially wrapped with the CFK. The high pressure gas vessel is configured to store fuel at ambient temperature at a sustained nominal working pressure (also called nominal working pressure or NWP) of at least 350 bar positive (= positive pressure relative to atmospheric pressure) or at least 700 bar positive. The cryogenic pressure vessel is suitable for storing fuel at the aforementioned working pressures, even at temperatures significantly below the operating temperature of the vehicle (for example more than 50 K or more than 100 K).

[0036] The pressure vessel assembly may in particular be mountable in the underfloor area under the passenger compartment of a motor vehicle, the longitudinal axes of the pressure vessels may extend parallel to one another in the mounting position and / or the individual pressure vessels may each have a length / diameter ratio having a value of 4-200, preferably 5-100, particularly preferably 6-50.

[0037] In one configuration, the pressure vessels are connected in parallel to one another. In this case, a common distribution pipe may be provided. The pressure vessels are usually connected directly to the distribution pipe without a separate, externally electrically operable shut-off valve between the distribution pipe and the individual pressure vessels. This distribution pipe can be used to form a fluid connection with the individual pressure vessels. A combination of parallel and series connections is also possible.

[0038] The distribution pipe or each pressure vessel individually may be provided with an electrically operable normally closed shut-off valve, which is arranged to shut off the pressure vessel assembly or the distribution pipe from the remaining fuel-guiding lines of the fuel supply system leading to the energy converter. This shut-off valve may have the function of an on-tank valve of a conventional pressure vessel. Advantageously, only one normally closed shut-off valve is provided. This shut-off valve may, for example, be directly screwable or screwable into the distribution pipe. The shut-off valve is typically the first valve provided downstream of each pressure vessel connected to the common distribution pipe. Each pressure vessel or distribution pipe may be provided with a pipe rupture prevention means, also called excess flow valve.

[0039] The technology disclosed in this specification will now be described with reference to the accompanying drawings. [Brief description of the drawings]

[0040] [Figure 1] FIG. 1 illustrates a pressure vessel assembly. [Diagram 2] FIG. 1 illustrates a portion of a pressure vessel assembly. [Diagram 3] FIG. 1 illustrates the interconnection of pressure vessels in a pressure vessel assembly. [Figure 4] FIG. 2 is a diagram showing a configuration of a movable support member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] FIG 1 shows, in a purely schematic manner, a portion of a pressure vessel assembly 10 according to one embodiment. The pressure vessel assembly 10 includes a plurality of pressure vessels 12, three of which can be seen in the portion shown in FIG 1. The three pressure vessels 12 have longitudinal axes that are parallel to one another.

[0042] Longitudinal ends 14 of pressure vessel 12 are supported as shown and as described below.

[0043] The pressure vessel assembly 10 has an upper mounting rail 21 and a lower mounting rail 22. Both mounting rails 21, 22 are oriented parallel to one another. In a typical installation situation of the pressure vessel assembly 10, both mounting rails 21, 22 may be installed transversely to the longitudinal direction of the vehicle, for example.

[0044] Each longitudinal end 14 is held by a respective centering element 40, which is integrated into each support shell 30. The support shell 30 is screwed to the mounting rails 21, 22 by means of a first bolt 50 and a second bolt 55. Each support shell 30 has a first part 31 and a second part 32, between which a separation line 33 is formed. The first part 31 is arranged above the second part 32. This makes it easy to mount the support shell 30 to the mounting rails 21, 22.

[0045] Each longitudinal end 14 of the pressure vessel 12 has an upper flat section 16 and a lower flat section 18. Both flat sections 16, 18 lie parallel to the mounting rails 21, 22. Both flat sections 16, 18 are held by respective centering elements 40 to ensure parallelism.

[0046] The pressure vessel assembly 10 is arranged in the illustrated configuration above a bottom sheet metal 7, which may for example define a motor vehicle below, and in particular may define an installation space below the passenger compartment of the motor vehicle.

[0047] 2 shows the support shell 30 and the centering element 40 located therein in greater detail. It can be seen there that the support shell 30 is formed with a first through hole 35 and a second through hole 36 through which the already mentioned bolts 50, 55 pass. The centering element 40 is likewise divided into two parts 41, 42 which are arranged one on top of the other. In the illustrated configuration, the centering element 40 is made of an elastic rubber material. This allows the holding of each longitudinal end 14 of the pressure vessel 12 in such a way that the already mentioned parallelism of the flat sections 16, 18 to the mounting rails 21, 22 is defined while at the same time allowing a limited mobility of each longitudinal end 14 relative to the support shell 30 and thus also to the mounting rails 21, 22. This limited mobility, both vertically and horizontally, allows each pressure vessel 12 to partially retreat from pressure acting from the side, for example in a side impact event, thereby effectively preventing damage to the pressure vessels 12 in such circumstances.

[0048] 3 shows a pressure vessel assembly 10 in which several pressure vessels 12 are connected to a common connecting line 60. The connecting line 60 is connected to the respective connecting pieces 19 of the pressure vessels 12 and connects the pressure vessels 12 together, so that the pressure vessels 12 can be filled with gaseous fuel and the gaseous fuel can be removed from the pressure vessels 12 again. In this case, typically no valves are provided between each pressure vessel 12 and the connecting line 60, which allows a common filling and a common removal. For this purpose, for example, a common tank shutoff valve (not shown) can be used. Alternatively, however, individual vessel valves can be provided to allow individual switching of each pressure vessel 12.

[0049] FIG. 4 shows the configuration of the above-mentioned support device as a mobile support. It can be seen there that both flat sections 16, 18 are made axially longer than the support shell 30 and the centering element 40. This allows for an axial play that can be used to compensate for changes in the length of the pressure vessel 12, for example due to pressure or temperature fluctuations. The fixed support can be simply formed by shortening the flat sections 16, 18 in the axial direction so that the restriction directly contacts the support shell 30. In particular, the pressure vessel assembly 10 can use a mobile support on one side of the pressure vessel 12 and a fixed support on the other side of the pressure vessel 12, so that the play required for the mobile support function is only present on one side, while on the other side a defined support is possible. Typically, a common connecting line 60, as can be seen in FIG. 3, is attached to the side of the pressure vessel 12 that is held by the fixed support.

[0050] For readability reasons, the phrase "at least one (mindestens ein(e)" has been omitted for brevity. Wherever features of the technology disclosed herein are described in the singular or indefinite article (e.g. der / ein Druckbehaelter, die / eine Lagerschalle, etc.), the plural is also disclosed (e.g. der mindestens eine Druckbehaelter, die mindestens eine Lagerschalle, etc.).

[0051] The above description of the present invention is used for illustrative purposes only, not for the purpose of limiting the present invention. Within the framework of the present invention, various changes and modifications are possible without departing from the scope of the present invention and its equivalents. [Explanation of symbols]

[0052] 7 Bottom metal sheet 10 Pressure Vessel Assembly 12 Pressure Vessels 14 Longitudinal end 16 Flat Section 18 Flat Section 21 Mounting rail 22 Mounting rail 30 Support shell 31 First Component 32 Second member 33 Separation line 35,36 Through hole 40 Centering Elements 41 First Component 42 Second Component 50,55 Volts 60 Connecting Pipes

Claims

1. A pressure vessel assembly (10) for an underfloor space of a motor vehicle, comprising: a plurality of pressure vessels (12); one or more mounting rails (21, 22); A plurality of support shells (30) attached to the mounting rails (21, 22); A pressure vessel assembly (10) comprising: a plurality of centering elements (40); one, some or all of the longitudinal ends (14) of the pressure vessel (12) have at least one flat section (16, 18) and are held by a centering element (40) in the support shell (30), whereby the flat section (16, 18) is at an angle of up to 5° with respect to the mounting rails (21, 22) to which the support shell (30) is attached; the centering elements (40) permit limited relative movement of the longitudinal ends (14) of the pressure vessel (12) relative to the mounting rails (21, 22), at least parallel to the mounting rails (21, 22); One, some or all of the centering elements (40) are made of a resilient material; At one, some or each longitudinal end (14), another flat section (16, 18) is formed opposite the flat section (16, 18) and parallel to the flat section (16, 18). A pressure vessel assembly (10) comprising:

2. 2. The pressure vessel assembly (10) of claim 1, wherein the pressure vessels (12) are connected in parallel with one another, a common distribution pipe is provided to which the pressure vessels (12) are directly connected, and no shut-off valves are provided between the distribution pipe and each of the pressure vessels (12).

3. 3. The pressure vessel assembly (10) of claim 1 or 2, wherein one, some or all of the support shells (30) are divided into a first member (31) and a second member (32).

4. The pressure vessel assembly (10) of claim 3, wherein a separation line (33) between the first member (31) and the second member (32) is parallel to the flat sections (16, 18).

5. 2. The pressure vessel assembly (10) of claim 1, wherein one, some, or all of the centering elements (40) further allow limited relative movement of the longitudinal ends (14) of the pressure vessel (12) relative to the mounting rails (21, 22) in a lateral direction relative to the mounting rails (21, 22).

6. The pressure vessel assembly (10) of claim 1, wherein the pressure vessel (12) is mounted transverse to a longitudinal direction of the vehicle.

7. The pressure vessel assembly (10) of claim 1, wherein one, some, or all of the centering elements (40) have one or more targeted break points to allow said relative movement.

8. The pressure vessel assembly (10) of claim 1, wherein one, some, or all of the centering elements (40) hold the flat sections (16, 18) parallel to the mounting rails (21, 22).

9. 2. The pressure vessel assembly (10) of claim 1, wherein one, some, or all of the support shells (30) are attached to one, two, or more mounting rails (21, 22) by one, two, or more threaded bolts (50, 55).

10. 2. The pressure vessel assembly (10) of claim 1, wherein an upper first mounting rail (21) is disposed above a first longitudinal end (14) of the pressure vessel (12), a lower first mounting rail (22) is disposed below the first longitudinal end (14) of the pressure vessel (12), and the support shell (30) for holding the first longitudinal end (14) is attached to both the upper first mounting rail (21) and the lower first mounting rail (22).

11. The pressure vessel assembly (10) of claim 1, wherein the support shell (30) and centering element (40) for the first longitudinal end (14) of the pressure vessel (12) form a fixed support.

12. 2. The pressure vessel assembly (10) of claim 1, wherein an upper second mounting rail (21) is disposed above the second longitudinal end (14) of the pressure vessel (12), a lower second mounting rail (22) is disposed below the second longitudinal end (14) of the pressure vessel (12), and the support shell (30) for holding the second longitudinal end (14) is attached to both the upper second mounting rail (21) and the lower second mounting rail (22).

13. The pressure vessel assembly (10) of claim 1, wherein the support shell (30) and the centering element (40) for the second longitudinal end (14) of the pressure vessel (12) form a movable support.

14. 14. The pressure vessel assembly (10) of claim 12 or 13, wherein one, some or all of the second longitudinal ends (14) are formed with axial play relative to the centering elements (40).

15. 15. The pressure vessel assembly (10) of claim 14, wherein the axial play is provided by one or more of the flat sections (16, 18) being axially longer than the surrounding centering element (40).

16. The pressure vessel assembly (10) of claim 1, wherein the longitudinal axes of the pressure vessels (12) are oriented parallel to one another.

17. The pressure vessel assembly (10) of claim 16, wherein immediately adjacent pressure vessels (12) have a minimum spacing of 2 mm to 4 mm from each other.

18. The pressure vessel assembly (10) of claim 1, wherein the planar sections (16, 18) are oriented parallel to a longitudinal axis of the pressure vessel (12).

19. The pressure vessel assembly (10) of claim 1, wherein one, some, or all of the centering elements (40) are configured to clamp one or two of the planar sections (16, 18).

20. 2. The pressure vessel assembly (10) of claim 1, wherein one, some, or all of the mounting rails (21, 22) are formed with one or more recesses transverse to the longitudinal extension of the mounting rails (21, 22), which form target breakage points when a load is applied in the longitudinal extension direction.

21. A motor vehicle comprising the pressure vessel assembly (10) of claim 1.

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