DE102020120727A1 - Pressure relief assembly and pressure vessel assembly - Google Patents

Abstract

According to the invention, the technology disclosed here relates to a pressure relief arrangement 10 having at least one pressure relief device 26 and at least one signaling device 40, the signaling device 40 being configured to generate a signal in response to gas flowing through the pressure relief device 26. According to the invention, the technology disclosed here also relates to a pressure vessel arrangement 5 with a pressure vessel 20 and at least one pressure relief arrangement 10.

Description

The technology disclosed herein relates to a pressure relief assembly and a pressure vessel assembly having at least one pressure vessel and at least one pressure relief assembly.

For example, pressure vessels can be used in motor vehicles to store gaseous fuel such as natural gas or hydrogen. Since pressure vessels can be under high gas pressure, pressure relief devices are often provided, which can respond to excessive pressure by releasing gas. As a result, gas pressure in the pressure vessel or also in the surrounding components can be reduced and safety can thus be increased.

However, it has turned out to be difficult to recognize in certain situations, such as after an accident, whether a pressure relief device has caused a pressure reduction or not. This can depend, for example, on whether a motor vehicle can be towed away safely after an accident without further measures or whether further measures for emptying a pressure vessel are necessary beforehand.

It is a preferred object of the technology disclosed herein to mitigate or obviate at least one disadvantage of a previously known solution or to propose an alternative solution. It is in particular a preferred object of the technology disclosed here to further develop a pressure relief device in such a way that its triggering can be recognized in a simple manner. Other preferred objects may arise from the beneficial effects of the technology disclosed herein. The objects are solved by the subject matter of the independent patent claims. The dependent claims represent preferred embodiments.

The technology disclosed here relates to a pressure relief arrangement having (i) at least one pressure relief device which can be fluidically connected to at least one pressure vessel, and (ii) at least one signal device, the signal device being configured to generate a signal in response to gas flowing through the pressure relief device . As a result, the signal can be used to identify in a simple manner whether gas is flowing or has flowed through the pressure relief device, so that its triggering can be detected. The signal can, for example, only be present for the time of the flow or it can also be present for a longer period of time, so that, for example, even a long time after an accident, after which the pressure relief device has been triggered and gas has been released, the triggering can still be detected and it can thus be reliably determined that the pressure has been relieved and the motor vehicle can, for example, be safely loaded onto a tow truck.

The pressure relief device can be provided in particular in the event of a malfunction of another component and/or an external thermal and/or mechanical effect (e.g. accident, local flame, etc.), with such a malfunction or effect leading to an incident in particular can. In the event of such a malfunction, the pressure relief device is set up in particular to reduce the pressure in the pressure vessel or in a pressure vessel arrangement which also includes other components. For this purpose, the pressure relief device is typically fluidly connected to at least one pressure vessel. The pressure relief device can expediently be set up to allow a fuel withdrawal mass flow for the pressure relief of the pressure vessel which is greater (for example at least by a factor of 1.5, 2, 5, 10, 100 or higher) than the maximum fuel withdrawal mass flow through the withdrawal path to at least one Energy converter (usually through a tank shut-off valve). The pressure relief device can be a thermally activatable pressure relief device. The pressure relief device that can be activated thermally, also called Thermal Pressure Relief Device (=TPRD) or thermal fuse, is usually provided adjacent to the pressure vessel. When exposed to heat (e.g. from flames), the TPRD releases the fuel stored in the pressure vessel into the environment. In particular, the pressure relief device releases the fuel as soon as the triggering temperature of the TPRD is exceeded (= is thermally activated). It can also be provided trigger lines. Such a system for thermal pressure relief is for example in the German patent application with the publication number DE 10 2015 222 252 A1 shown.

The pressure relief device can in particular have at least one opening element that can be thermally activated or actuated. During thermal activation, usually at a triggering temperature of approx. 110 °C and more, the opening elements change their shape or are destroyed (= thermal activation). This opens the pressure relief device. The opening element can change its shape as a result of the thermal activation. Alternatively or additionally, the opening element can be destroyed by thermal activation. The term "Off ing element" is limited within the scope of the technology disclosed here to the area of the pressure relief device, the shape of which can be changed or destroyed as a result of thermal activation. In the closed state of the pressure relief device, the opening element has the direct or indirect effect that the pressure relief device does not release a flow path from the interior of the pressure vessel to the environment. In the case of indirect closing, the opening element holds a valve body, for example, with the valve body in turn closing the pressure relief device. The opening element is designed in such a way that it opens at a triggering temperature, for example of 110° C., ie it releases the flow path from the interior of the pressure vessel to the environment. The triggering temperature is typically selected in such a way that, in the event of a thermal event, for example a vehicle fire, the pressure vessel is prevented from bursting due to thermal structural weakening.

Pressure relief devices with such opening elements are, for example, in the German patent applications DE 10 2016 206 192 , DE 10 2016 217 028 , DE 10 2016 213 288 , DE 10 2016 218 692 , DE 10 2016 222 668 and DE 10 2017 205 645 disclosed, the content of which with regard to the pressure relief device or opening elements is hereby incorporated by reference.

The opening element can be designed as a glass ampoule, for example. Such a glass ampoule is a fluid-filled bursting body. The glass ampoule has a closed fluid volume which is surrounded by a material (e.g. glass) which is comparatively brittle or breakable even at the triggering temperature. The material for the glass ampoule is not limited to "glass", but any material that is sufficiently brittle can be selected. The fluid volume is filled with a fluid which expands comparatively strongly when heated. If the temperature now rises to the triggering temperature, the glass ampoule breaks and thus triggers the pressure relief device (= release of the flow path to the environment).

Alternatively or additionally, a fusible link can be provided, preferably a eutectic fusible link. If the temperature in the pressure relief device rises to the triggering temperature, the fusible link becomes soft. The softened fusible link is deformed by a force generated directly or indirectly by the internal pressure of the pressure vessel. This deformation of the fusible link triggers the pressure relief device.

Furthermore, the opening element can also comprise a shape-memory material, in particular a shape-memory wire. The shape-memory material can in particular be designed to assume a first shape at a temperature below the triggering temperature, which differs from the second shape, which occurs when the triggering temperature is exceeded. Specific configurations of a pressure relief device with a glass ampoule, a fusible link and/or a shape-memory material are known to those skilled in the art. For example, the DE 10 2014 000 616 A1 a pressure relief device with a shape memory material and also discusses solutions with a glass ampoule and a fusible link in the introductory part.

According to one possible embodiment, the pressure relief device can be designed as a remote pressure relief device, which can represent a pressure relief component that can be activated remotely.

The pressure relief device can, for example, be connected fluidically directly to a pressure vessel, for example it can be part of an on-tank valve or some other valve arrangement. It can be arranged, for example, in a boss or a connection piece of the pressure vessel. However, other connection options are also conceivable, for example the pressure relief device can be connected to a high-pressure line system or to a medium-pressure line system or at another point which at least in some situations allows a fluidic connection to the pressure vessel.

In principle, any element which generates any type of signal in response to a gas flowing through the pressure relief device can be regarded as a signaling device. A signal is typically perceptible acoustically, optically, haptically or in some other way to the human senses and/or is perceptible to electronic devices. Direct perceptibility through human senses can in particular make it easier to recognize a deployment at the scene of an accident, since technical aids do not have to be used in this case. The recognizability of the signal by electronic devices can facilitate automated further processing.

The signaling device is typically designed in such a way that it is precisely the gas flowing through which generates the signal. For this purpose, in particular, the kinetic energy contained in the gas flowing through can be used, which can trigger the signal.

In particular, the signaling device can have a signaling element that is moved by the gas flowing through. Such a signaling element can, in particular, enable the movement of the gas flowing through to be directly converted into a movement of the signaling element. This can be done directly or indirectly, for example via a cable pull. The signal element can, for example, remain in the state after movement after it has been moved, so that it is possible to continuously detect that the pressure relief device has been triggered.

The signal can be generated in particular by the kinetic energy of the gas flowing through. In this case, use can be made of the fact that escaping gas in the event of a pressure relief typically has sufficient kinetic energy to cause the signaling device to be triggered. Additional energy sources can advantageously be dispensed with. This enables a simple and safe execution.

According to one embodiment, the signaling device can have a device for generating electrical energy from the gas flowing through. As a result, the kinetic energy contained in the gas flowing through can be used directly to generate electrical energy. A signal can be generated using this electrical energy. The device for generating electrical energy can in particular have a turbine and a generator. In particular, the gas flowing through can flow around the turbine and be driven thereby. The generator can be connected to the turbine in such a way that it generates electricity when the turbine rotates.

According to one embodiment, the signaling device can have an electrically actuable signaling means, which is connected to the device for generating electrical energy for the electrical supply. In particular, this can mean that the electrically actuable signaling means is supplied with electrical energy when and precisely when this electrical energy is made available by the device for generating electrical energy, i.e. when gas flows through the pressure relief device. For example, a direct connection can thus be established between the gas flowing through, the electrical energy generated therefrom and an electrically actuable signaling means actuated thereby, which enables a simple design and a reliable function. An electrically actuable signaling means can be designed, for example, as a lamp or a sound-generating device.

The signaling device can in particular have a driver which can be moved by the gas flowing through. Such a driver can in particular move other components that can generate the signal. It enables a simple design, since the kinetic energy in the gas flowing through is typically sufficient to actuate a driver. The driver can, for example, be rotatably or pivotably mounted so that it is moved by the gas flow flowing through. For example, it can be designed as a flat element. It can also be designed as a turbine, for example. In this case, the turbine typically does not actuate a generator but, for example, a cable pull.

According to one embodiment, the signaling device can have a mechanical signaling means that can be actuated by the driver. In other words, there can be a mechanical connection between the driver and the mechanical signaling means, so that a movement of the driver, which is triggered by the gas flow flowing through, can lead to a movement of the signaling means. The driver and the mechanical signaling means can be connected to one another in particular by means of a cable pull. This allows for a simple and reliable design, with the cable pull also being able to bridge distances, so that signaling means and carriers can be placed at appropriate locations.

According to one embodiment, the signaling device can have a radio device for generating a radio signal. As a result, an electronically processable radio signal can be generated, which can be received, for example, by suitable devices. For example, an automated evaluation can be carried out as a result, whereby, for example, auxiliary measures can be initiated automatically or a decision can be made about necessary security measures.

For the electrical supply, the radio device can be connected in particular to the device for generating electrical energy. In particular, this can mean that the radio device is supplied with electrical energy when and only when gas is flowing through the pressure relief device. In particular, the radio device can be designed to transmit the radio signal immediately when there is a sufficient energy supply.

According to one embodiment, the signaling device can have an electrical line which is severed by the gas flowing through, the signal being measurable via the electrical line resistance is. This can be an embodiment in which the electrical line is typically intact and thus has only a very low measurable resistance as long as the pressure relief device has not triggered. However, if the pressure relief device is triggered, the electrical line is destroyed by the gas flowing through, as a result of which the measurable resistance is very high or infinite. This can easily be detected using simple measuring equipment.

According to respective embodiments, the pressure relief device is a mechanical and/or a thermal pressure relief device. A mechanical pressure relief device can react in particular to an existing overpressure. A thermal pressure relief device can react in particular to an excessively high temperature. Reference is made to the statements already given above.

In particular, the signaling device can be arranged fluidically upstream or downstream of the pressure relief device. The pressure relief device can be connected to a line system, for example, and the signaling device can be arranged in the line system or can be part of this line system.

The technology disclosed herein further relates to a pressure vessel assembly having (i) at least one pressure vessel and (ii) at least one pressure relief assembly as described herein, wherein an inlet of the pressure relief device is fluidically connected to an interior of the at least one pressure vessel.

The advantages already described above can be achieved by means of such a pressure vessel arrangement. The fluidic connection between the inlet of the pressure relief device of the pressure relief arrangement and the interior of the at least one pressure vessel can be established, for example, in such a way that the pressure relief device is arranged directly on the pressure vessel, for example in a boss of the pressure vessel and/or as part of an on-tank valve of the Pressure vessel, or it can also be provided separately from the pressure vessel. In particular, the pressure vessel can be installed at a suitable location in the motor vehicle, for example in a sufficiently large installation space. It can be, for example, a large-volume pressure vessel or a chain tank, the latter being able to have, for example, several storage tubes that are smaller and can make good use of the available installation space. The technology disclosed herein is applicable regardless of the design of the pressure vessel. The input is in particular a connection of the pressure relief device, to which a container under high pressure can be connected in order to relieve it if necessary, ie to let gas flow out.

According to an advantageous embodiment, electronic components of the signaling device are arranged in the pressure vessel. As a result, these electronic components can be protected particularly well, since the pressure vessel is typically installed in a protected location in the motor vehicle, which is usually not particularly affected by an accident, and the pressure vessel also offers additional protection because it is typically very stable is. The reliability of the signaling device can be increased as a result.

A pressure vessel can be used in particular for a motor vehicle (for example passenger cars, motorcycles, commercial vehicles). A pressure vessel is typically used to store fuel that is gaseous under ambient conditions. The pressure vessel can be used, for example, in a motor vehicle that is operated with compressed (also called Compressed Natural Gas or CNG) or liquefied (also called Liquid Natural Gas or LNG) natural gas or with hydrogen. The pressure vessel is fluidly connected in particular to at least one energy converter which is set up to convert the chemical energy of the fuel into other forms of energy. A pressure vessel can be designed in particular as a composite overwrapped pressure vessel. The pressure vessel can be, for example, a cryogenic pressure vessel or a high-pressure gas vessel. High-pressure gas tanks are designed to permanently store fuel at ambient temperatures at a nominal operating pressure (also called nominal working pressure or NWP) of at least 350 bar overpressure (= excess pressure compared to atmospheric pressure) or at least 700 bar overpressure. A cryogenic pressure vessel is suitable for storing the fuel at the aforementioned operating pressures even at temperatures that are significantly (for example more than 50 K or more than 100 K) below the operating temperature of the motor vehicle.

The pressure vessel can in particular have a connection piece, which can also be referred to as a boss. The fitting is provided in the pressure vessel opening of the pressure vessel. As a rule, the connection piece is screwed into the pressure vessel opening provided at one end of the pressure vessel, in particular in a boss made of metal. Such a connection piece is then designed as a connection unit usually also forms and includes a tank shut-off valve or an on-tank valve. This connection unit is fluidly connected as a rule to fuel lines. The connecting piece and/or the pressure vessel opening are expediently provided coaxially to the longitudinal axis of the pressure vessel.

A combination of an electromagnetically actuated valve, a manually actuated valve and a thermal pressure relief device (TPRD) is typically referred to as an on-tank valve. The electromagnetically actuated valve and the manually actuated valve can in particular be connected in series, one of which can represent a tank shut-off valve. Furthermore, an on-tank valve typically includes a bleed port or a bleed valve. A bleed port is typically a connection through which gas can be released from a pressure vessel even if the valves fail. A bleed valve is a valve with such functionality. The on-tank valve is typically the valve assembly mounted directly at one end of the pressure vessel and in direct fluid communication with the interior of the pressure vessel.

In other words, it was recognized that a burning or burnt-out vehicle, for example, does not always show whether a pressure relief device has triggered. However, knowing this is important for further handling of the vehicle, since a tank that is not depressurized may have to be depressurized with further measures. In principle, the mechanical energy of the gas flowing out of the pressure relief device can be used to generate a clear indication of the triggering process. The mechanical energy can either lead directly to the generation of the hint or can be converted into electrical energy via an energy converter, so that this then generates the hint. A possible design would be a mechanical carrier that is swept along by the flow and moves a marking device via a cable pull.

Alternatively, a turbine and a mechanical transmission could also operate a cable. The marking device is advantageously installed in a clearly visible area of the vehicle. In a further variant, electrical energy is generated via a turbine-generator combination, which generates a license plate on the vehicle. Additionally or alternatively, a radio-based message could also be generated. In a further variant, the outflow is detected and processed into an electrical signal inside the tank container or pressure container. The advantage here is that the electronics are adequately protected even in the event of a fire in order to be functional until the pressure relief device is triggered. Finally, in a further variant, an electrical connection is severed by the mass flow of the outflowing gas. By measuring the resistance of the ends of the line that lead to the outside, the separation of the connection and thus the triggering of the pressure relief device on the tank container can be measured.

For example, a mechanical driver in the outflow path of a TPRD can be swept along by the mass flow when triggered and cause a marking in the engine compartment to be shifted via a cable pull.

• 1: eine Druckbehälteranordnung gemäß einem ersten Ausführungsbeispiel,
• 2: eine Druckbehälteranordnung gemäß einem zweiten Ausführungsbeispiel,
• 3: eine Druckbehälteranordnung gemäß einem dritten Ausführungsbeispiel, und
• 4: eine Druckbehälteranordnung gemäß einem vierten Ausführungsbeispiel.

The technology disclosed here will now be explained with reference to the figures. show:

• 1 : a pressure vessel arrangement according to a first embodiment,
• 2 : a pressure vessel arrangement according to a second embodiment,
• 3 : a pressure vessel assembly according to a third embodiment, and
• 4 : a pressure vessel assembly according to a fourth embodiment.

1 shows a pressure vessel arrangement 5 according to a first embodiment. The pressure vessel arrangement 5 has a pressure vessel 20, it being mentioned that, in principle, a plurality of pressure vessels can also be used. A connection piece 22 is provided on the pressure vessel 20 and is arranged at a longitudinal end of the pressure vessel 20 . A tank shut-off valve 24 is present in the connection piece 22 and is connected to a consumer 2 via a consumer line 3 . Consumer 2 can in particular be a fuel cell or a gas-powered internal combustion engine, gaseous fuel stored in pressure vessel 20 being used to operate consumer 2 .

Furthermore, a pressure relief device 26 is provided in the connection piece 22, which opens if the pressure inside the pressure vessel 20 should otherwise become too great. This can happen, for example, if a fire should develop in the vicinity of the pressure vessel 20 .

A line 30 is connected to the pressure relief device 26, via which gas that flows through the pressure relief device 26 and thus flows out of the interior of the pressure vessel 20 is discharged. A signaling device 40 is arranged along the line 30, by means of which the outflow of gas can be identified. The pressure relief device 26 and the signal device 40 together form a pressure relief arrangement 10. Here are now in the total of four embodiments, which in the 1 until 4 are shown, four different versions of the signaling device 40 are shown, the other components being identical and therefore not being described again.

When executing 1 the signaling device 40 has a turbine 50, a shaft 52 and a generator 55. It also has a lamp 60 which is a signaling means and is connected to the generator 55 and is an electrically actuable signaling means. The turbine 50, the shaft 52 and the generator 55 together form a device 45 for generating electrical energy.

When gas flows through line 30, it drives turbine 50. The kinetic energy contained in the outflowing gas is thus used to drive the turbine 50 and to operate the generator 55 . This thus generates electricity, by means of which the lamp 60 is made to light up. The lamp 60 can be attached, for example, in an engine compartment or on an outside of the motor vehicle, so that the light signal can be perceived directly. If it is to be expected that a typical outflow process lasts long enough for the lamp 60 to light up due to the outflow of gas being able to be recognized, for example, by emergency services in the event of an accident, then the embodiment shown here is sufficient. If the lamp 60 is to shine longer, a buffer capacitor or a battery can be used to temporarily store the electrical energy generated by the generator 55, for example. This also applies to other versions which are based on electrical energy.

At the in 2 In the second exemplary embodiment illustrated, a radio device 70 with an antenna 75 is used as an alternative, which is supplied with electrical energy by the generator 55 when the turbine 50 is in operation. The radio device 70 is designed in such a way that, in response to a supply of electrical energy, it emits a radio signal via the antenna 75, which can be received by other devices such as a mobile phone or a special device in an emergency vehicle. As a result, information can be displayed electronically that gas is escaping. Here, too, a buffer capacitor or a battery can be used if necessary to enable longer transmissions.

At the in 3 illustrated third exemplary embodiment, an electrical design of the signaling device 40 is dispensed with. Rather, in this exemplary embodiment, the signaling device 40 has a driver 80 which is arranged in the line 30 and can be rotated about a first pivot point 82 . The driver 80 is connected via a cable 84 to a signaling element 86 which can be rotated about a second pivot point 88 . If gas flows through the line 30, the driver 80 is pressed downwards in the embodiment shown and the signaling element 86 is pulled to the left via the cable pull 84. This can serve as an indicator for escaping gas and be installed at a suitable location in the vehicle. If the signaling element 86 is to be held in a specific position after actuation, a latching element or a magnet can be used for this, for example. Alternatively, a driver in the form of a turbine could also be used to actuate the cable pull 84 .

At the in 4 illustrated fourth embodiment, the signaling device 40 is formed by an electrical line 92 which has a section 94 which passes through the line 30. The section 94 is connected to the rest of the electrical line 92 by means of contacts 93,95. When gas flows through line 30, the kinetic energy contained in the gas ensures that section 94 is destroyed, as a result of which current flow is no longer possible. A measuring device 90 can thus be used to identify in a simple manner whether gas has flowed through the line 30, since in this case the resistance is typically infinite, whereas it is very low without triggering. The measuring device 90 can, for example, be permanently installed in the vehicle, but it can also be used, for example, by rescue workers who carry it with them in a portable manner, in which case, for example, the contacts 93, 95 can be routed to suitable locations, which can also be accessed from the outside accessible in the event of an accident. The destruction of the section 94 is permanent, so that the triggering of the pressure relief device 26 can also be reliably indicated at later times.

For reasons of legibility, the expression “at least one” has been partially omitted for the sake of simplicity. If a feature of the technology disclosed here is described in the singular or indefinitely (e.g. the pressure vessel, the pressure relief device, etc.), the plural should also be disclosed at the same time (e.g. the at least one pressure vessel, the at least one pressure relief device , Etc.).

The foregoing description of the present invention is for illustrative purposes only and not for the purpose of limiting the invention. Various changes and modifications can be made within the scope of the invention without departing from the scope of the invention and its equivalents.

Reference List

2

consumer

3

consumer line

5

pressure vessel assembly

10

pressure relief arrangement

20

pressure vessel

22

fitting

24

tank shut-off valve

26

pressure relief device

30

management

40

signaling device

45

Device for generating electrical energy

50

turbine

52

wave

55

generator

60

lamp

70

radio equipment

75

antenna

80

driver

82

pivot point

84

cable pull

86

signal element

88

pivot point

90

gauge

92

electrical line

93

Contact

94

section

95

Contact

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102015222252 A1 [0006]
• DE 102016206192 [0008]
• DE 102016217028 [0008]
• DE 102016213288 [0008]
• DE 102016218692 [0008]
• DE 102016222668 [0008]
• DE 102017205645 [0008]
• DE 102014000616 A1 [0011]

Claims (15)

A pressure relief assembly (10) comprising - at least one pressure relief device (26) which can be fluidically connected to at least one pressure vessel (20), and - at least one signaling device (40), the signaling device (40) being configured to generate a signal in response to gas flowing through the pressure relief device (26). Pressure relief arrangement (10) after claim 1 , wherein the signaling device (40) has a signaling element (86) which is moved by the gas flowing through. Pressure relief arrangement (10) after claim 1 or 2 , where the signal is generated by the kinetic energy of the gas flowing through. Pressure relief arrangement (10) according to one of the preceding claims, in which the signaling device (40) has a device (45) for generating electrical energy from the gas flowing through. Pressure relief arrangement (10) after claim 4 , wherein the device (45) for generating electrical energy comprises a turbine (50) and a generator (55). Pressure relief arrangement (10) after claim 4 or 5 , wherein the signaling device (40) has an electrically actuable signaling means (60) which is electrically connected to the device (45) for generating electrical energy for the electrical supply. Pressure relief arrangement (10) according to one of the preceding claims, in which the signaling device (40) has a driver (80) which can be moved by the gas flowing through. Pressure relief arrangement (10) after claim 7 , The signaling device (40) having a mechanical signaling element (86) which can be actuated by the driver (80). Pressure relief arrangement (10) after claim 8 , wherein the driver (80) and the mechanical signaling element (86) are connected to one another by means of a cable pull (84). Pressure relief arrangement (10) according to any one of the preceding claims, wherein the signaling device (40) has a radio device (70) for generating a radio signal. Pressure relief device (26) after claim 10 as well as after claim 4 or any claim dependent thereon, wherein the radio means (70) for electrical supply is connected to the means (45) for generating electrical energy. Pressure relief device (26) according to one of the preceding claims, wherein the signal device (40) has an electrical line (92) which is severed by the gas flowing through, and wherein the signal is a resistance which can be measured across the electrical line (92). Pressure relief arrangement (10) according to one of the preceding claims, wherein the pressure relief device (26) is a mechanical and/or a thermal pressure relief device (26). Pressure vessel arrangement (5), comprising - at least one pressure vessel (20), and - At least one pressure relief arrangement (10) according to any one of the preceding claims, wherein an input of the pressure relief device (26) is fluidly connected to an interior of the at least one pressure vessel (20). pressure vessel arrangement Claim 14 , wherein electronic components of the signaling device (40) are arranged in the pressure vessel (20).

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