Fastening element, pressure vessel system and motor vehicle

Abstract

The technology disclosed herein relates to a fastening element (200) for fastening one or more pressure vessels (300), said fastening element (200) being elongate and containing a channel (205) for a gaseous fuel. The invention further relates to a pressure vessel system (100) having such a fastening element (200) and to a motor vehicle having such a pressure vessel system.

Description

TECHNICAL FIELD

[0001] The technology disclosed herein relates to a fixing element for fixing one or more pressure vessels, to a pressure vessel system and to a motor vehicle. BACKGROUND

[0002] Pressure vessels are used, for example, for storing gaseous fuel in motor vehicles or in other mobile or stationary arrangements. The use of such pressure vessels should in this case extend in the future to an increasing number of different applications, for example to different construction forms of motor vehicles. In this case, depending on the different applications, some criteria, for example space saving and simple construction, play an increasingly greater role. SUMMARY

[0003] It is a preferred task of the technology disclosed herein to reduce or eliminate at least one of the disadvantages of the known solutions or to suggest an alternative solution. A preferred task of the technology disclosed herein is, in particular, to specify a simplified holding of pressure vessels. Further preferred tasks can result from the advantageous effects of the technology disclosed herein. The individual tasks are solved by the subject matter of the independent claims. The dependent claims form preferred embodiments.

[0004] The technology disclosed herein relates to a fixing element for fixing one or more pressure vessels, (i) the fixing element being elongate in construction; (ii) the fixing element being constructed for fixing one or more pressure vessels to the fixing element; (iii) a continuous channel for gaseous fuel being constructed in the fixing element; and (iv) one or more interfaces for connecting a respective at least one pressure vessel to the channel being constructed in the fixing element. By means of such a fixing element it is possible for the functionality of fixing pressure vessels and the functionality of the introduction and / or the removal of gaseous fuel to be combined in only one single element. This saves additional lines and ensures a compact and weight-reduced construction. In particular, the functionality of fixing pressure vessels and the functionality of the introduction and / or the removal of gaseous fuel can be combined in only one profile or in only one elongate element.

[0005] The fixing element can be understood in particular as an element to which one or more pressure vessels can be fixed. Typically, a plurality of pressure vessels is fixed on the element. In particular, the fixing element can be constructed such that the fixing element can hold and support the pressure vessels in a defined installation situation. The elongate construction can be understood in particular as the length of the fixing element being a multiple of the dimensions visible in cross section, in particular width and / or height, of the fixing element. In particular along the longitudinal extension it can be provided that a plurality of pressure vessels is arranged side by side. For fixing the pressure vessels different embodiments are known. For example, the pressure vessels can be laid flat by means of a connecting block.

[0006] Possible embodiments are explained in more detail further below. The continuous channel can in particular form a line for gaseous fuel. The channel can serve to fill the pressure vessel with gaseous fuel. Alternatively or additionally, the channel can serve to lead gaseous fuel away from the pressure vessel. Such a leading away can for example serve to supply a consumer, for example a fuel cell. The interface serves in particular to establish a connection between the channel and the pressure vessel. The connection is in particular a flow- conducting connection. This allows a flow from the channel to the pressure vessel and / or in the opposite direction. The channel can in particular be permanently retained in the fixing element. If for example the pressure vessel is replaced, the pressure vessel can be connected in a simple manner to the interface and thus to the channel.

[0007] In particular, the channel can serve not only for filling but also for extraction. Otherwise, there is typically an additional line which respectively assumes a further functionality.

[0008] In particular, the fixing element can be configured as an extruded profile. This allows simple manufacture and stable construction.

[0009] In particular, the fixing element can be configured such that one or more pressure vessels can be laid flat on the fixing element. This can in particular be specified such that the fixing element is sufficiently rigid in order to support the weight of a plurality of pressure vessels laid flat on the fixing element. This can for example be ensured by a suitable material selection, a suitable material thickness and / or a profile configuration.

[0010] The pressure vessel can in particular be laid flat on the fixing element by means of a respective connection block of the pressure vessel. It can in particular be specified that the fixing element is configured for one or more pressure vessels to be laid flat on the fixing element such that the channel is underneath the one pressure vessel or the plurality of pressure vessels. Thus, the functionality of the pressure vessel held by the fixing element can be integrated with the functionality of the channel.

[0011] In particular, the fixing element can be configured as a single profile or a single element, in particular connected together, in which the channel is configured and which is configured for one or more pressure vessels to be laid flat. This allows a particularly high degree of integration.

[0012] In particular, additional lines can be dispensed with, which are typically provided above the connection block of the pressure vessel in embodiments known from the prior art.

[0013] The fixing element can in particular have mechanical stability, such that the pressure vessel can be laid flat on the fixing element at least on one of its sides, in particular without further support of the pressure vessel being required. In an element having such mechanical stability, the channel can in particular also be provided. In particular, the walls of the channel can have mechanical stability.

[0014] In particular, the channel can extend parallel to the longitudinal extension of the fixing element. It is thereby possible for gaseous fuel to be distributed over this longitudinal extension and / or to be supplied by the pressure vessel along this longitudinal extension.

[0015] In particular, the channel can have a rounded, polygonal, oblong or square cross section. In the case of a rounded cross section, a particularly advantageous pressure distribution over all sides is typically achieved. Other types of cross section can be adapted, for example, to the conditions of the profile construction.

[0016] The channel can in particular be open at one longitudinal end of the fixing element. At this longitudinal end, an interface of the channel can in particular be specified. It is thereby possible for gaseous fuel to be introduced into the channel, which gaseous fuel should then be guided further into the pressure vessel; and / or gaseous fuel can be extracted from the pressure vessel, which gaseous fuel should then be used in a consumer. Both functionalities are also possible.

[0017] According to an embodiment, the channel is closed at both longitudinal ends of the fixing element. In this case, an interface can in particular be specified in order to allow gaseous fuel to be introduced or extracted. Here, this functionality exists as described with reference to an open longitudinal end just now. However, for this purpose, an open longitudinal end is not required, but rather a separate interface is employed. The interface can in particular be arranged transversely to the longitudinal extension of the channel and / or of the fixing element.

[0018] According to an advantageous embodiment, the channel is lined with a barrier layer which prevents gaseous fuel from escaping. Such a barrier layer can in particular be constructed as a barrier. The barrier can in particular prevent permeation, prevent gaseous fuel from escaping and thus avoid the escape of gaseous fuel.

[0019] In particular, a longitudinal groove can be formed in the fixing element on the upper side. Next to the longitudinal groove, in particular, the interfaces can be provided. The longitudinal groove is formed, in particular, in the position on the upper side typical for the application of the fixing element. Thus, the fixing element typically has a preferred orientation, in which the upper side is clearly visible. On the upper side, for example, pressure vessels can be laid flat. The longitudinal groove can be formed, in particular, as an elongated cutout. Thus, the stability can be increased. Furthermore, the protrusions of the connection blocks of the pressure vessels can be embedded into the longitudinal groove in order to stabilize the pressure vessels. In the longitudinal groove, the pressure vessels can be movable along the extension of the longitudinal groove or along the longitudinal extension of the fixing element.

[0020] The fixing element can be formed, for example, from aluminum. However, other materials, such as steel, are also possible. For example, production in a casting process is possible.

[0021] In particular, the fixing element can have one or more connection means for connection to a vehicle body. Thus, the fixing element can be fixed on a vehicle body. This allows a firm and permanent connection between the fixing element and the vehicle body.

[0022] The technology disclosed herein also relates to a pressure vessel system comprising (i) at least one fixing element as explained herein, (ii) one or more pressure vessels having connection blocks for storing gaseous fuel, and (iii) one or more connection elements, wherein each pressure vessel is fixed on the fixing element by means of the connection blocks and each pressure vessel is connected to the interfaces of the fixing element by means of the connection elements. By means of such a pressure vessel system the advantages mentioned in the outset can be achieved. With regard to the fixing element, all embodiments and variants explained herein can be employed. In particular, it is possible to fix the pressure vessels in a simple manner, in particular in such a way that the pressure vessels are laid flat on the fixing element. Furthermore, a particularly simple interface of the pressure vessels for the introduction and / or removal of gaseous fuel is possible.

[0023] The connection blocks of the pressure vessels can be laid flat on the fixing element. This allows a particularly simple fixing of the pressure vessels and also a simple exchange or other removal of the pressure vessels.

[0024] The pressure vessels can be movably fixed on the fixing element, in particular in the longitudinal direction of the fixing element. Thus, an additional safety against collision events can be achieved. If the fixing element is installed, for example, transversely to the driving direction of a motor vehicle in the motor vehicle, a movement of the pressure vessels transversely to the driving direction is allowed in a side collision event in a simple manner, thus, the consequences of a side collision event can be reduced.

[0025] The pressure vessel can be immovably fixed to the fixing element, in particular transversely to the longitudinal extent of the fixing element. This can be achieved, in particular, in that the respective connecting block surrounds the fixing element on both sides. This can be achieved, for example, by means of a plurality of protrusions which extend along the longitudinal extent of the fixing element. A cut-out can be formed, for example, in the connecting block, into which the fixing element is inserted in the assembled state.

[0026] In particular, it can therefore be provided that the pressure vessel is immovably fixed transversely to the longitudinal extent of the fixing element and / or that the pressure vessel is movably fixed along the longitudinal extent of the fixing element. Further fixing functions can be achieved by means of separate fixing supports or loose supports, in particular on opposite end portions of the pressure vessel, and / or by means of tensioning straps.

[0027] According to an embodiment, the connecting element is formed flexibly. The connecting element can be formed, for example, as a flexible hose. This allows a certain movement of the pressure vessel relative to the fixing element without a break in the connection between the channel and the pressure vessel. In particular in the case of a collision event, it is thus also possible to avoid an undesired escape of gaseous fuel.

[0028] The connecting block can have, in particular, a cut-out between the first protrusion and the second protrusion. The pressure vessel can be laid on the fixing element by means of this cut-out, such that the first protrusion and the second protrusion abut laterally on the fixing element. The cut-out thus receives the fixing element, in particular, and the protrusions can ensure, in particular, that the pressure vessel is immovable in a direction transverse to the longitudinal extent of the fixing element, but is always movable parallel to the longitudinal extent of the fixing element. In particular, the protrusions can be inserted into longitudinal grooves of the fixing element. This can be considered lateral abutment. It is sufficient, therefore, for only a portion of the fixing element to be surrounded, in particular when viewed in cross-section.

[0029] The pressure vessel system can have, in particular, one or a plurality of tensioning straps, each of which surrounds at least one pressure vessel or at least one connecting block on the upper side and is fixed to the fixing element. This allows a simple locking of the pressure vessels against lifting upwards. It is thus possible, for example, to improve the robustness against driving on particularly uneven ground.

[0030] The connecting element can be connected, in particular, on the upper side to the respective connecting block of the pressure vessel and / or on the upper side to the fixing element. This allows a simple assembly, since it is simple to grasp from above. The interface of the connecting element on the upper side can also be achieved indirectly, for example by means of a pressure connection, which can be curved, in particular. The connecting element can be formed, in particular, as a flexible or rigid line.

[0031] The pressure vessel system can in particular have at least one loose bearing in which the pressure vessel is supported on a longitudinal end opposite the fixing element. There can be one loose bearing for each pressure vessel, for example.

[0032] There can also be one common loose bearing for a plurality or all of the pressure vessels. Such a loose bearing allows the pressure vessels to be supported or fixed on the side opposite the fixing element. Thermal expansion can be simply compensated for, for example, as a result of the loose bearing.

[0033] The technology disclosed here also relates to a motor vehicle having a pressure vessel system as described herein. With regard to the pressure vessel system, all the embodiments and variants described herein can be used. The pressure vessel system can in particular be installed such that the fixing element extends transversely to the direction of travel. This allows a simple design for increasing the resilience to side impact events, as already explained above.

[0034] In other words, in principle, the starting point can be that combined hydrogen pressure tanks or other pressure vessels having a working pressure of, for example, 700 to 875 bar are employed and connected in known embodiments by means of a rail for filling and extraction. The fixing of the pressure vessels can be achieved in the housing by means of so-called neck mounting on the head or connection block of the respective pressure vessel, by means of a fixed bearing on one pressure vessel end and by means of a loose bearing on the other end. As a result, longitudinal expansion as a result of pressure changes and temperature changes of the pressure vessels can be compensated for. Here, in particular, a fixing solution is described which has as few components as possible in order to save weight, manufacturing outlay and to reduce the accumulation of errors, which at the same time requires a crash-safe solution without critical transverse forces being able to be transmitted to the connection block and causing a leak.

[0035] In a gas pressure tank or pressure vessel tank composite system, they are typically fixed individually or on a housing. A corresponding number of identical components can thus be achieved. In addition, such pressure vessels can be connected for filling and extraction. This is typically achieved by means of a fixed rail and / or by means of individual pipe sections which are connected to one another in the supply path in series or in parallel, for example by means of a T-piece of the pressure vessels. The support function and the supply function are combined in one component as described herein for reducing weight, components, manufacturing processes and errors.

[0036] A supply track for individual pressure vessels is described herein, which simultaneously serves as a fixed support. The pressure vessels can be laid onto the web of the track geometry by means of connecting blocks and corresponding slots in the connecting blocks, the support in the longitudinal direction of the pressure vessel is typically realized form- locking, the support on the sides and upwards and / or downwards can be formed by means of tensioning straps, which can be screwed onto the track. The fixing elements mentioned above can be referred to as a track, among other things. The supply of the pressure vessels can be realized by means of drillings along the track, or as a continuous interspace when the track is formed as an extruded profile, as described herein. Small tube bundles, which are screwed into the track and thus connected with the interspace or the drilling in the track, which guides the hydrogen, can be guided to the connecting blocks or rather the head of the storage tank. In the case of lateral impulses, for example due to a collision, these tube bundles are sufficiently flexible in order to avoid a direct critical force onto the head or rather the connecting block. At the same time, the head is movable in the transverse direction on the web of the track and a critical load on the head can also thus be prevented by means of the elastic tensioning straps, and a leakage can thus be avoided.

[0037] Especially, a hydrogen flat storage system is described herein, which can preferably be installed in the floor under area of a passenger car, but can also be employed in other applications. For example, an installation situation in the floor under space below the first and second seat row in a motor vehicle can be considered. A plurality of individual pressure vessels are there typically installed in a housing and are connected to one another in the supply and extraction path. The orientation of the pressure vessels in the housing can especially correspond to the longitudinal axis of the vehicle, within the left and right door sills.

[0038] The pressure vessels are especially for storing a gaseous fuel under ambient conditions. The pressure vessel system described herein can for example be installed in a motor vehicle, which is operated with compressed natural gas (also referred to as CNG) or liquefied natural gas (also referred to as LNG) or with hydrogen. The pressure vessels can especially be flow- conductively connected with at least one energy converter, which is built for converting the chemical energy of the fuel into another energy form.

[0039] Such a pressure vessel system typically comprises at least one pressure vessel, especially a composite overwrapped pressure vessel (COPV). The pressure vessel can for example be a cryogenic pressure vessel or a high-pressure gas vessel. The high-pressure gas vessel is constituted for storing the fuel durably in ambient temperature in a nominal operating pressure (also referred to as nominal working pressure or NWP) of 350 bar gauge pressure (i.e. overpressure relative to the atmospheric pressure) or at least 700 bar gauge pressure. The cryogenic pressure vessel is built for storing the fuel in the aforementioned operating pressure also at a temperature, which is significantly lower than the operating temperature of the motor vehicle (for example more than 50 K or more than 100 K lower).

[0040] The impermeable material already mentioned above can for example be embodied as a liner. The liner can form a hollow body, in which for example the channel is formed. Such a liner can also be provided in the pressure vessel. The liner can for example be made of aluminum or steel or of an aluminum or steel alloy. In addition, the liner can be made of plastic. Depending on the material used, however, a linerless embodiment is also possible. BRIEF DESCRIPTION OF DRAWINGS

[0041] The technology disclosed herein is now explained by means of the attached drawings. The drawings are as follows:

[0042] Figure 1 The pressure vessel system is shown in an exploded view;

[0043] Figure 2 The fixing element is shown;

[0044] Figure 3 A sectional view of the fixing element is shown; and

[0045] Figure 4 The pressure vessel system in the assembled state is shown. DETAILED DESCRIPTION

[0046] Figure 1 The pressure vessel system 100 according to an embodiment is shown purely schematically. The pressure vessel system 100 has a fixing element 200. The pressure vessel system also has a pressure vessel 300 with a connection block 400 and a tension belt 350. The pressure vessel 300 represents a plurality of pressure vessels arranged in parallel.

[0047] The fixing element 200 is fixed on a vehicle body element 110. This serves for fastening and fixing of the fixing element 200. The pressure vessel 300 has the already mentioned connection block 400, which serves on the one hand for holding the pressure vessel 300 and on the other hand for the introduction and removal of gaseous fuel.

[0048] In the connection block 400 a cutout 410 is embodied. Here, a first protrusion 420 and a second protrusion 430 serve for the lateral delimitation of the cutout 410. Between the two protrusions 420, 430 there is the cutout 410. The cutout 410 is embodied such that in the assembled state the fixing element 200 is embedded in the cutout 410.

[0049] As shown, the fixing element 200 is configured elongated. The fixing element is in particular configured as an elongated extruded profile. This allows the pressure vessel 300 to be supported, but also further not shown pressure vessels, such that the protrusions 420, 430 laterally enclose the fixing element 200 or at least a portion thereof, so that the connection block 400 lies on the fixing element 200 and a movement transverse to the longitudinal extension of the fixing element 200 is not possible. The second protrusion 430 is for this purpose in the illustrated embodiment embedded into the longitudinal groove 210. However, in the longitudinal direction of the fixing element 200, movement is continued to be possible. This allows the fixing element 200 to be mounted laterally in a vehicle so as to advantageously react to a side impact event when the pressure vessel 300 is mounted longitudinally.

[0050] The connection block 400 also has a pressure connection 440. This pressure connection enters from above into the remainder of the connection block 400. In the assembled state, a connection element 450 is connected to the pressure connection, which connection element is configured as an at least partially flexible hose. It is connected from above on the connection block 400 via the pressure connection 440. In the assembled state, it is connected to a connector 460, which is connected on the interface 220 of the fixing element 200. The interface 220 is connected to a channel in the interior of the fixing element 200, which is not visible in Figure 1 The fixing element 200 has a plurality of interfaces 220 on one side of the longitudinal groove 210. On the other side of the longitudinal groove 210, a screw-in hole 240 is provided for fixing the tensioning strap 350 by means of a screw 260.

[0051] The tensioning strap 350 surrounds the connection block 400 on the upper side in such a way that the fixing element 200 is embedded into the cutout 410 on the lower side. A reliable holding of the pressure vessel 300 is thus achieved. On the opposite side, which is not described in Figure 1 Particularly, a loose bearing can be provided in order to allow a temperature compensation. The tensioning strap 350 can be particularly flexible in order to allow the longitudinal movement already explained.

[0052] Figure 2 The fixing element 200 is shown separately. In particular, the full length is described here. As shown, the fixing element has in total 10 interfaces 220, so that in total 9 pressure vessels 300 can be fixed on the fixing element. Each pressure vessel 300 is here fixed equivalently to the embodiment described in Figure 1 Each interface serves for connection to one channel 205, which is configured in the fixing element 200 and is open on the longitudinal end, which is visible in Figure 2 This serves, for example, for connection to a filling device and / or a consumer.

[0053] Figure 3 The fixation element 200 is shown in a cross-sectional view. It is visible therein that there is a channel 205 in the interior of the fixation element 200, which extends transversely to the plane of the drawing and thus in the longitudinal direction of the fixation element 200. The interface 220 is connected to the channel 205 from above. This allows direct access to the channel 205. The channel 205 can thus be used to introduce gaseous fuel into the pressure vessel 300 and / or to lead gaseous fuel out of the pressure vessel 300. Figure 3

[0054] Parallel to the channel 205, there is also a further cavity 230 in the fixation element 200. This cavity 230 is not used for introducing gaseous fuel, but for stability and weight reduction. Between the cavity 230 and the channel 205 there is the longitudinal groove 210 already mentioned. Overall, the cross-sectional view shown serves to ensure stability with low weight.

[0055] Figure 4 The pressure vessel system 100 is shown in the assembled state. Here, with regard to the individual elements, reference is made to the explanations of the prior description of the Figures 1 to 3 Here, it is visible in particular that the connection in each connection block 400 is realized from above. Likewise, the connection on the channel 205 is realized from above in each case. This facilitates the assembly and perhaps removal of the required components. It is further visible that the body element 110 is connected to the fixation element 200 by means of screws 120. As shown, the tensioning strap 350 surrounds the connection block 400 on the upper side and thus ensures that the connection block 400 does not lift up, even when the motor vehicle in which the pressure vessel system 100 is installed is driven on rough roads, for example. However, a certain flexibility also exists in the tensioning strap 350, so that a movement along the longitudinal extension of the fixation element 200 is possible. This allows a favorable reaction to side impact events, in particular when the fixation element 200 is installed transversely to the driving direction of the vehicle and thus the individual pressure vessels 300 are oriented in the longitudinal direction.

[0056] For reasons of readability, the expression "at least one" is omitted in parts. If a feature of the technology disclosed herein is described in the singular or in indefinite quantity (e.g. the pressure vessel / one pressure vessel, the channel / one channel, etc.), their plural should also be disclosed in conjunction (e.g. at least one pressure vessel, at least one channel, etc.).

[0057] The above description of the invention is merely intended for explanatory purposes and not for limiting purposes of the invention. Different modifications and changes are possible within the scope of the invention without departing from the invention and the scope of equivalent measures of the invention.

[0058] List of reference signs

[0059] 100 pressure vessel system​

[0060] 110 body element

[0061] 120 screw

[0062] 200 fixation element

[0063] 205 channel

[0064] 210 longitudinal slot

[0065] 220 interface

[0066] 230 cavity

[0067] 240 screw-in hole

[0068] 300 pressure vessel

[0069] 350 tensioning band

[0070] 360 screw

[0071] 400 connection block

[0072] 410 cutout

[0073] 420 first protrusion

[0074] 430 second protrusion

[0075] 440 pressure interface

[0076] 450 connection element

[0077] 460 connector

Claims

1. A fixing element (200) for fixing one or more pressure vessels (300). - The fixing element (200) is elongated; - The fixing element (200) is configured to fix one or more pressure vessels (300) to the fixing element; - A continuous channel (205) for gaseous fuel is formed in the stationary element (200); - One or more interfaces (220) are formed in the fixing element (200) for connecting at least one pressure vessel (300) to the channel (205); and - The fixing element (200) is configured to place one or more pressure vessels (300) flat on the fixing element such that the channel (205) is below the one or more pressure vessels (300).

2. The fixing element (200) according to claim 1, wherein, The fixing element (200) is configured as an extruded profile.

3. The fixing element (200) according to claim 1 or 2, wherein, The fixing element (200) is configured as a unique profile in which the channel (205) is formed, and the profile is configured for laying one or more pressure vessels (300) flat.

4. The fixing element (200) according to any one of the preceding claims, wherein, The channel (205) extends parallel to the longitudinal extension of the fixing element (200).

5. The fixing element (200) according to any one of the preceding claims, wherein, The channel (205) has a smooth, polygonal, rectangular or square cross-section.

6. The fixing element (200) according to any one of the preceding claims, wherein, The channel (205) is formed open at one longitudinal end of the fixing element (200).

7. The fixing element (200) according to any one of claims 1 to 5, wherein, The channel (205) is closed at both longitudinal ends of the fixing element (200).

8. The fixing element (200) according to any one of the preceding claims, wherein, The channel (205) is lined with impermeable material to prevent gaseous fuel from escaping.

9. The fixing element (200) according to any one of the preceding claims, wherein, A longitudinal groove (210) is formed on the upper side of the fixing element (200), and the interface (220) is disposed next to the longitudinal groove (210).

10. The fixing element (200) according to any one of the preceding claims, wherein, The fixing element is made of aluminum.

11. The fixing element (200) according to any one of the preceding claims, wherein, The fixing element has one or more connecting devices for connecting to the vehicle body.

12. A pressure vessel system comprising: - At least one fixing element (200) according to any one of the preceding claims; - One or more pressure vessels (300) with connecting blocks (400) for storing gaseous fuel; and - One or more connecting elements (450); Each pressure vessel (300) is fixed to the fixing element (200) by a connecting block (400); and Each pressure vessel (300) is connected to the fixed element (200) via an interface (220) of a connecting element (450).

13. The pressure vessel system (100) according to claim 12, wherein, The connecting block (400) of the pressure vessel (300) is placed flat on the fixing element (200).

14. The pressure vessel system (100) according to claim 12 or 13, wherein, The pressure vessel (300) is movably fixed to the fixing element (200) on the longitudinal extension of the fixing element (200).

15. The pressure vessel system (100) according to any one of claims 12 to 14, wherein, The pressure vessel (300) and the longitudinal extension of the fixing element (200) are fixed to the fixing element (200) in a transverse and immovable manner.

16. The pressure vessel system (100) according to any one of claims 12 to 15, wherein, The connecting element (450) is flexibly constructed.

17. The pressure vessel system (100) according to any one of claims 12 to 16, wherein, The connecting block (400) has a cut (410) between a first protrusion (420) and a second protrusion (430), through which the pressure vessel (300) is laid flat on the fixing element (200), such that the first protrusion (420) and / or the second protrusion (430) abut against the fixing element (200) on the side, and / or at least one protrusion (430) is embedded in a longitudinal groove (210) of the fixing element (200).

18. The pressure vessel system (100) according to any one of claims 12 to 17, wherein, The pressure vessel system has one or more tension bands (350), each tension band (350) surrounding at least one pressure vessel (300) or at least one connecting block (400) on its upper side and fixed to a fixing element (200).

19. The pressure vessel system (100) according to any one of claims 12 to 18, wherein, The connecting element (450) is connected on the upper side to a corresponding connecting block (400) of the pressure vessel (300) and / or on the upper side to a fixing element (200).

20. The pressure vessel system (100) according to any one of claims 12 to 19, wherein, The pressure vessel system has at least one loose support in which the pressure vessel (300) is supported at a longitudinal end opposite to the fixed element (200).

21. A motor vehicle having a pressure vessel system (100) according to any one of claims 12 to 20.

22. The motor vehicle according to claim 21, wherein, The pressure vessel system (100) is installed such that the fixed element (200) extends laterally with respect to the direction of travel.

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