EP4357662A1 - Composite pressure vessel - Google Patents
Composite pressure vessel Download PDFInfo
- Publication number
- EP4357662A1 EP4357662A1 EP22202977.9A EP22202977A EP4357662A1 EP 4357662 A1 EP4357662 A1 EP 4357662A1 EP 22202977 A EP22202977 A EP 22202977A EP 4357662 A1 EP4357662 A1 EP 4357662A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liner
- plastic
- base body
- pressure vessel
- connection assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 229920003023 plastic Polymers 0.000 claims abstract description 42
- 239000004033 plastic Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000005304 joining Methods 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 5
- 239000001257 hydrogen Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract 2
- 238000003466 welding Methods 0.000 claims description 10
- 229920001903 high density polyethylene Polymers 0.000 claims description 9
- 239000004952 Polyamide Substances 0.000 claims description 8
- 229920002647 polyamide Polymers 0.000 claims description 8
- 239000004700 high-density polyethylene Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920001002 functional polymer Polymers 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/056—Small (<1 m3)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0604—Liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0619—Single wall with two layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0305—Bosses, e.g. boss collars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2109—Moulding
- F17C2209/2118—Moulding by injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/036—Very high pressure (>80 bar)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/013—Reducing manufacturing time or effort
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/036—Avoiding leaks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
Definitions
- the present invention relates to a composite pressure vessel and a method for producing a composite pressure vessel.
- pressure vessels in particular for installation in motor vehicles, can be constructed as Type IV pressure vessels.
- Such composite pressure vessels can be used in particular as a hydrogen tank in a hydrogen-powered motor vehicle.
- Such pressure vessels comprise a plastic liner and a fiber-reinforced outer shell. It is known to use a so-called boss part to fill and/or remove medium from such a pressure vessel.
- metal bosses are used to provide a suitable transition between a plastic liner and a metal-screwed valve.
- the sealing of the metal boss part to the plastic of the liner must be solved in a suitable way, for example by using a groove and a sealing ring.
- connection assembly in particular a valve assembly or distributor assembly, wherein the connection assembly has a tight connection to the liner and can be manufactured simply and inexpensively.
- a further object of the invention is to provide a simple and inexpensive method for producing such a composite pressure vessel.
- a composite pressure vessel comprising an internal liner for receiving a medium, in particular hydrogen, and a shell surrounding the liner made of a fiber-reinforced material, further comprising a connection assembly, in particular a valve assembly or distributor assembly, wherein on the one hand the connection assembly is connected to the liner in a gas-tight manner and on the other hand the connection assembly has at least one screw, plug or weld connection, wherein the connection assembly, in addition to a base body of the connection assembly, has a liner interface part, wherein the liner interface part is designed as a gas-tight overmolding of the base body with a first plastic, wherein the liner interface part is connected to the liner in a gas-tight manner by a joining process.
- connection assembly in particular a valve assembly, which has at least one screw, plug or weld connection and also seals off the liner, thus usually being formed by a metallic boss part, can optionally be made of another, non-metallic material, since the connection of the The connection assembly to the liner is made via a plastic overmold, which can be joined gas-tight to the plastic of the liner.
- a multi-component injection-molded part can, to a certain extent, take on the interface function of a boss part and the sealing function between boss and liner.
- This functional integration of interface and seal means that the use of a metal boss part can be dispensed with and a simple sealing point can also be ensured by joining, in particular welding, the liner and boss.
- the gas-tight connection of the liner interface part to the liner by a joining process is preferably carried out by fusing or welding.
- connection assembly is preferably arranged at a front end, on the central axis of the preferably cylindrical pressure vessel.
- the base body consists at least substantially of a second plastic, wherein the second plastic is preferably different from the first plastic, particularly preferably of polyamide.
- the base body consists essentially of fiber-reinforced plastic, in particular with a glass fiber reinforcement, in particular polyamide with a glass fiber reinforcement.
- the at least one screw, plug or weld connection of the connection assembly is preferably formed by a connecting element, preferably a sleeve, and the base body forms an overmolding of the connecting element, preferably the sleeve.
- the connecting element preferably the sleeve, is preferably made of metal.
- the connecting element can have a screw thread, in particular an internal thread, and/or a spline and/or a welding surface.
- the liner interface part is preferably designed as a material-locking overmolding of the base body with the first plastic.
- the first and second plastics are preferably selected such that the first plastic melts with the second plastic during overmolding.
- the first plastic is a compatibilized plastic ("compatibilizer"), which enables an indirect connection between the plastic of the liner, preferably PE or HDPE, and the second plastic of the base body, preferably polyamide.
- the compatibilized plastic of the liner interface part preferably forms a material-locking connection to the plastic of the liner.
- the first plastic can in particular be PE (polyethylene) or HDPE (high density polyethylene) with a functional polymer, for example PE-MAH or HDPE-MAH (maleic anhydride).
- PE polyethylene
- HDPE high density polyethylene
- a functional polymer for example PE-MAH or HDPE-MAH (maleic anhydride).
- the first plastic of the liner interface part is preferably welded to the liner.
- a method according to the invention for producing such a composite pressure vessel comprises overmolding a base body of the connection assembly with a first plastic in order to form the liner interface part, wherein the liner interface part is then connected to the liner by a joining process, preferably by welding, particularly preferably by laser welding.
- the base body is first formed as an overmolding of the second plastic of at least one sleeve, which forms a screw, plug or welded connection of the connection assembly.
- the base body is then overmolding with the first plastic in order to form the liner interface part.
- This first plastic is then joined, preferably welded, to the liner of the pressure vessel.
- a composite pressure vessel according to the invention is shown in a front area in which a connection assembly 2 is arranged.
- the connection assembly 2 is arranged on an end cap of the pressure vessel and extends along the center axis of the cylindrical type IV pressure vessel in the axial direction.
- the composite pressure vessel comprises an internal liner 1 for receiving a medium, in particular hydrogen, and a - in the Fig.1 and 2 not shown - the shell surrounding the liner 1 made of a fiber-reinforced material.
- the pressure vessel further comprises the connection assembly 2, namely a valve assembly or distributor assembly.
- the connection assembly 2 is connected to the liner 1 in a gas-tight manner and the connection assembly 2 has two screw, plug or welded connections 3, for example for coupling a supply and a removal pipe for the medium in the pressure vessel.
- connection assembly 2 has a base body 4 of the connection assembly 2, which consists of a second plastic, namely polyamide.
- the base body 4 has a fiber reinforcement, in particular a glass fiber reinforcement.
- the connection assembly 2 also has a liner interface part 5, wherein the liner interface part 5 is designed as a gas-tight overmolding of the base body 4, in that the base body 4 has been overmolding with a first plastic.
- the liner interface part 5 forms a material-locking overmolding of the base body 4 with the first plastic.
- the first plastic is a compatibilized plastic that enables a material-locking connection to the plastic of the liner 1, namely HDPE.
- the first plastic is, for example, HDPE-MAH.
- connection module 2 can, for example, as in Fig.1 shown, be arranged on the front side of the pressure vessel such that the liner interface part 5 essentially forms a flat continuation of the liner 1 and/or lies in a recess of the liner 1 on the front side of the pressure vessel.
- the liner interface part 5 can encompass one end of the base body 4 and/or be positively connected to the base body 4.
- the liner interface part 5 is connected to the liner 1 in a gas-tight manner by a joining process, namely by welding, preferably by laser welding.
- the at least one screw, plug or weld connection 3 of the connection assembly 2 is formed by a metallic sleeve 6, which can have an internal screw thread, for example.
- the base body 4 was designed as an overmolding of the sleeve 6.
- the base body 4 can first be formed by overmolding the two sleeves 6 with the second plastic, for example polyamide.
- the base body 4 can be overmolded with the first plastic, for example HDPE-MAH, in order to form the liner interface part 5.
- the first plastic for example HDPE-MAH
- the liner interface part 5 is then welded to the liner 1.
- the procedure can therefore include, for example, the following steps: Injection molding of the base body 4 of the connection assembly 2, i.e. the distributor and/or a drainage valve, with one or more metallic sleeves 6 for plug or screw connection, preferably made of GF-reinforced polyamide.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Ein Composite-Druckbehälter, umfassend einen innen liegenden Liner (1) zur Aufnahme eines Mediums, insbesondere von Wasserstoff, und eine den Liner (1) umgebende Hülle aus einem faserverstärkten Material, ferner umfassend eine Anschlussbaugruppe (2), insbesondere eine Ventilbaugruppe oder Verteilerbaugruppe, wobei einerseits die Anschlussbaugruppe (2) gasdicht mit dem Liner (1) verbunden ist und andererseits die Anschlussbaugruppe (2) zumindest eine Schraub-, Steck- oder Schweißverbindung (3) aufweist, wobei die Anschlussbaugruppe (2), zusätzlich zu einem Grundkörper (4) der Anschlussbaugruppe (2), ein Liner-Schnittstellenteil (5) aufweist, wobei das Liner-Schnittstellenteil (5) als gasdichte Umspritzung des Grundkörpers (4) mit einem ersten Kunststoff ausgebildet ist, wobei das Liner-Schnittstellenteil (5) durch einen Fügeprozess gasdicht mit dem Liner (1) verbunden ist, sowie ein Verfahren zur Herstellung eines solchen Composite-Druckbehälters.A composite pressure vessel, comprising an internal liner (1) for receiving a medium, in particular hydrogen, and a shell surrounding the liner (1) made of a fiber-reinforced material, further comprising a connection assembly (2), in particular a valve assembly or distributor assembly, wherein on the one hand the connection assembly (2) is connected to the liner (1) in a gas-tight manner and on the other hand the connection assembly (2) has at least one screw, plug or weld connection (3), wherein the connection assembly (2), in addition to a base body (4) of the connection assembly (2), has a liner interface part (5), wherein the liner interface part (5) is designed as a gas-tight overmolding of the base body (4) with a first plastic, wherein the liner interface part (5) is connected to the liner (1) in a gas-tight manner by a joining process, and a method for producing such a composite pressure vessel.
Description
Die vorliegende Erfindung betrifft einen Composite-Druckbehälter und ein Verfahren zur Herstellung eines Composite-Druckbehälters.The present invention relates to a composite pressure vessel and a method for producing a composite pressure vessel.
Es ist bekannt das Druckbehälter, insbesondere für den Einbau in Kraftfahrzeugen, als Type-IV Druckbehälter aufgebaut werden können. Solche Composite Druckbehälter können insbesondere als Wasserstofftank in einem auf Basis von Wasserstoff angetriebenen Kraftfahrzeug verwendet werden. Derartige Druckbehälter umfassen einen Liner aus Kunststoff und eine faserverstärkte Außenhülle. Zum Befüllen und/oder zur Entnahme von Medium aus einem solchen Druckbehälter ist es bekannt, ein sogenanntes Bossteil zu verwenden.It is known that pressure vessels, in particular for installation in motor vehicles, can be constructed as Type IV pressure vessels. Such composite pressure vessels can be used in particular as a hydrogen tank in a hydrogen-powered motor vehicle. Such pressure vessels comprise a plastic liner and a fiber-reinforced outer shell. It is known to use a so-called boss part to fill and/or remove medium from such a pressure vessel.
Üblicherweise werden metallische Bosse eingesetzt, um einen geeigneten Übergang zwischen einem Kunststoff-Liner und einem metallisch verschraubten Ventil zu ermöglichen. Die Abdichtung des metallischen Bossteils zu dem Kunststoff des Liners muss auf eine geeignete Art gelöst werden, beispielsweise durch die Verwendung einer Nut und eines Dichtungsrings.Typically, metal bosses are used to provide a suitable transition between a plastic liner and a metal-screwed valve. The sealing of the metal boss part to the plastic of the liner must be solved in a suitable way, for example by using a groove and a sealing ring.
Metallische Bossteile sind zudem teuer und erfordern oftmals mehrere Prozessschritte für ihre Integration in den Behälter.Metallic boss parts are also expensive and often require several process steps for their integration into the container.
Es ist eine Aufgabe der Erfindung, einen Composite-Druckbehälter anzugeben mit einer Anschlussbaugruppe, insbesondere einer Ventilbaugruppe oder Verteilerbaugruppe, wobei die Anschlussbaugruppe eine dichte Verbindung zum Liner aufweist und dabei einfach und kostengünstig hergestellt werden. Eine weitere Aufgabe der Erfindung ist es, ein einfaches und kostengünstiges Verfahren zur Herstellung eines solchen Composite-Druckbehälters anzugeben.It is an object of the invention to provide a composite pressure vessel with a connection assembly, in particular a valve assembly or distributor assembly, wherein the connection assembly has a tight connection to the liner and can be manufactured simply and inexpensively. A further object of the invention is to provide a simple and inexpensive method for producing such a composite pressure vessel.
Die Lösung der Aufgabe erfolgt durch einen Composite-Druckbehälter, umfassend einen innen liegenden Liner zur Aufnahme eines Mediums, insbesondere von Wasserstoff, und eine den Liner umgebende Hülle aus einem faserverstärkten Material, ferner umfassend eine Anschlussbaugruppe, insbesondere eine Ventilbaugruppe oder Verteilerbaugruppe, wobei einerseits die Anschlussbaugruppe gasdicht mit dem Liner verbunden ist und andererseits die Anschlussbaugruppe zumindest eine Schraub-, Steck- oder Schweißverbindung aufweist, wobei die Anschlussbaugruppe, zusätzlich zu einem Grundkörper der Anschlussbaugruppe, ein Liner-Schnittstellenteil aufweist, wobei das Liner-Schnittstellenteil als gasdichte Umspritzung des Grundkörpers mit einem ersten Kunststoff ausgebildet ist, wobei das Liner-Schnittstellenteil durch einen Fügeprozess gasdicht mit dem Liner verbunden ist.The object is achieved by a composite pressure vessel, comprising an internal liner for receiving a medium, in particular hydrogen, and a shell surrounding the liner made of a fiber-reinforced material, further comprising a connection assembly, in particular a valve assembly or distributor assembly, wherein on the one hand the connection assembly is connected to the liner in a gas-tight manner and on the other hand the connection assembly has at least one screw, plug or weld connection, wherein the connection assembly, in addition to a base body of the connection assembly, has a liner interface part, wherein the liner interface part is designed as a gas-tight overmolding of the base body with a first plastic, wherein the liner interface part is connected to the liner in a gas-tight manner by a joining process.
Erfindungsgemäß kann eine Anschlussbaugruppe, insbesondere eine Ventilbaugruppe, die zumindest eine Schraub-, Steck- oder Schweißverbindung aufweist und auch zum Liner hin abdichtet, somit üblicherweise durch ein metallisches Bossteil gebildet wird, wahlweise aus einem anderen, nicht-metallischen Material hergestellt werden, da die Verbindung der Anschlussbaugruppe zum Liner über eine Kunststoff-Umspritzung erfolgt, die gasdicht mit dem Kunststoff des Liners gefügt werden kann.According to the invention, a connection assembly, in particular a valve assembly, which has at least one screw, plug or weld connection and also seals off the liner, thus usually being formed by a metallic boss part, can optionally be made of another, non-metallic material, since the connection of the The connection assembly to the liner is made via a plastic overmold, which can be joined gas-tight to the plastic of the liner.
Ein Mehrkomponenten-Spritzgussteil kann dabei gewissermaßen die Interface-Funktion eines Bossteils und die Dicht-Funktion zwischen Boss und Liner übernehmen. Durch diese Funktionsintegration von Schnittstelle und Dichtung kann vom Einsatz eines metallischen Bossteils abgesehen werden und es kann auch eine einfache Dichtstelle, durch Fügen, insbesondere Verschweißung von Liner und Boss gewährleistet werden.A multi-component injection-molded part can, to a certain extent, take on the interface function of a boss part and the sealing function between boss and liner. This functional integration of interface and seal means that the use of a metal boss part can be dispensed with and a simple sealing point can also be ensured by joining, in particular welding, the liner and boss.
Die gasdichte Verbindung des Liner-Schnittstellenteils durch einen Fügeprozess mit dem Liner erfolgt vorzugsweise durch Verschmelzen bzw. Verschweißen.The gas-tight connection of the liner interface part to the liner by a joining process is preferably carried out by fusing or welding.
Die Anschlussbaugruppe ist bevorzugt an einem stirnseitigen Ende, an der Mittelachse des vorzugsweise zylindrischen Druckbehälters angeordnet.The connection assembly is preferably arranged at a front end, on the central axis of the preferably cylindrical pressure vessel.
Vorzugsweise besteht der Grundkörper zumindest im Wesentlichen aus einem zweiten Kunststoff, wobei der zweite Kunststoff bevorzugt vom ersten Kunststoff verschieden ist, besonders bevorzugt aus Polyamid.Preferably, the base body consists at least substantially of a second plastic, wherein the second plastic is preferably different from the first plastic, particularly preferably of polyamide.
Besonders bevorzugt besteht der Grundkörper im Wesentlichen aus faserverstärktem Kunststoff, insbesondere mit einer Glasfaserverstärkung, insbesondere Polyamid mit einer Glasfaserverstärkung.Particularly preferably, the base body consists essentially of fiber-reinforced plastic, in particular with a glass fiber reinforcement, in particular polyamide with a glass fiber reinforcement.
Die zumindest eine Schraub-, Steck- oder Schweißverbindung der Anschlussbaugruppe wird bevorzugt durch ein Verbindungselement, bevorzugt eine Hülse, gebildet und der Grundkörper bildet eine Umspritzung des Verbindungselements, bevorzugt der Hülse. Das Verbindungselement, bevorzugt die Hülse, besteht vorzugsweise aus Metall. Das Verbindungselement kann ein Schraubgewinde aufweisen, insbesondere ein Innengewinde, und/oder eine Steckverzahnung und/oder eine Schweißfläche.The at least one screw, plug or weld connection of the connection assembly is preferably formed by a connecting element, preferably a sleeve, and the base body forms an overmolding of the connecting element, preferably the sleeve. The connecting element, preferably the sleeve, is preferably made of metal. The connecting element can have a screw thread, in particular an internal thread, and/or a spline and/or a welding surface.
Bevorzugt ist das Liner-Schnittstellenteil als stoffschlüssige Umspritzung des Grundkörpers mit dem ersten Kunststoff ausgebildet. Bevorzugt sind der erste und zweite Kunststoff so ausgewählt, dass der erste Kunststoff mit dem zweiten Kunststoff beim Umspritzen verschmilzt.The liner interface part is preferably designed as a material-locking overmolding of the base body with the first plastic. The first and second plastics are preferably selected such that the first plastic melts with the second plastic during overmolding.
Bevorzugt ist der erste Kunststoff ein kompatibilisierter Kunststoff ("Compatibilizer"), der eine indirekte Verbindung zwischen dem Kunststoff des Liners, bevorzugt PE oder HDPE, und dem zweiten Kunststoff des Grundkörpers, bevorzugt Polyamid, ermöglicht. Der kompatibilisierte Kunststoff des Liner-Schnittstellenteils bildet bevorzugt eine stoffschlüssige Verbindung zu dem Kunststoff des Liners.Preferably, the first plastic is a compatibilized plastic ("compatibilizer"), which enables an indirect connection between the plastic of the liner, preferably PE or HDPE, and the second plastic of the base body, preferably polyamide. The compatibilized plastic of the liner interface part preferably forms a material-locking connection to the plastic of the liner.
Der erste Kunststoff kann insbesondere PE (polyethylene) oder HDPE (high density polyethylene) mit einem funktionalen Polymer sein, zum Beispiel PE-MAH oder HDPE-MAH (maleic anhydride).The first plastic can in particular be PE (polyethylene) or HDPE (high density polyethylene) with a functional polymer, for example PE-MAH or HDPE-MAH (maleic anhydride).
Der erste Kunststoff des Liner-Schnittstellenteils ist bevorzugt mit dem Liner verschweißt.The first plastic of the liner interface part is preferably welded to the liner.
Ein erfindungsgemäßes Verfahren zur Herstellung eines solchen Composite-Druckbehälters umfasst, dass ein Grundkörper der Anschlussbaugruppe umspritzt wird mit einem ersten Kunststoff, um das Liner-Schnittstellenteil auszubilden, wobei danach das Liner-Schnittstellenteil durch einen Fügeprozess, bevorzugt durch Verschweißen, mit dem Liner verbunden wird, besonders bevorzugt durch Laserschweißen.A method according to the invention for producing such a composite pressure vessel comprises overmolding a base body of the connection assembly with a first plastic in order to form the liner interface part, wherein the liner interface part is then connected to the liner by a joining process, preferably by welding, particularly preferably by laser welding.
Vorzugsweise wird zuerst der Grundkörper als Umspritzung des zweiten Kunststoffs zumindest einer Hülse ausgebildet, die eine Schraub-, Steck- oder Schweißverbindung der Anschlussbaugruppe bildet. Danach erfolgt das Umspritzen des Grundkörpers mit dem ersten Kunststoff, um das Liner-Schnittstellenteil zu bilden. Dieser erste Kunststoff wird danach mit dem Liner des Druckbehälters gefügt, bevorzugt verschweißt.Preferably, the base body is first formed as an overmolding of the second plastic of at least one sleeve, which forms a screw, plug or welded connection of the connection assembly. The base body is then overmolding with the first plastic in order to form the liner interface part. This first plastic is then joined, preferably welded, to the liner of the pressure vessel.
Die Erfindung wird im Folgenden beispielhaft unter Bezugnahme auf die Zeichnungen beschrieben.
- Fig. 1
- ist eine Schnittansicht eines stirnseitigen Abschnitts eines erfindungsgemäßen Composite-Druckbehälters.
- Fig. 2
- ist eine dreidimensionale Ansicht des stirnseitigen Abschnitts des Composite-Druckbehälters gemäß
Fig. 1 .
- Fig.1
- is a sectional view of an end portion of a composite pressure vessel according to the invention.
- Fig. 2
- is a three-dimensional view of the front section of the composite pressure vessel according to
Fig.1 .
In
Der Composite-Druckbehälter umfasst einen innen liegenden Liner 1 zur Aufnahme eines Mediums, insbesondere von Wasserstoff, und eine - in den
Die Anschlussbaugruppe 2 weist einen Grundkörper 4 der Anschlussbaugruppe 2 auf, der aus einem zweiten Kunststoff besteht, nämlich aus Polyamid. Der Grundkörper 4 weist eine Faserverstärkung auf, insbesondere eine Glasfaserverstärkung.The
Die Anschlussbaugruppe 2 weist zudem ein Liner-Schnittstellenteil 5 auf, wobei das Liner-Schnittstellenteil 5 als gasdichte Umspritzung des Grundkörpers 4 ausgebildet ist, dadurch dass der Grundkörper 4 mit einem ersten Kunststoff umspritzt wurde. Das Liner-Schnittstellenteil 5 bildet eine stoffschlüssige Umspritzung des Grundkörpers 4 mit dem ersten Kunststoff. Der erste Kunststoff ist ein kompatibilisierter Kunststoff, der eine stoffschlüssige Verbindung zu dem Kunststoff des Liners 1, nämlich HDPE, ermöglicht. Der erste Kunststoff ist beispielsweise HDPE-MAH.The
Die Anschlussbaugruppe 2 kann beispielsweise, wie in
Das Liner-Schnittstellenteil 5 ist durch einen Fügeprozess, nämlich durch Schweißen, bevorzugt durch Laserschweißen, gasdicht mit dem Liner 1 verbunden.The
Die zumindest eine Schraub-, Steck- oder Schweißverbindung 3 der Anschlussbau-gruppe 2 wird durch eine metallische Hülse 6 gebildet, die beispielsweise ein innen liegendes Schraubgewinde aufweisen kann. Der Grundkörper 4 wurde als Umspritzung der Hülse 6 ausgebildet.The at least one screw, plug or
Zur Herstellung des Druckbehälters kann zunächst der Grundkörper 4 als Umspritzung der beiden Hülsen 6 mit dem zweiten Kunststoff, beispielsweise Polyamid, ausgebildet werden.To produce the pressure vessel, the
Anschließend kann, bevorzugt in der selben Werkzeugform, der Grundkörper 4 mit dem ersten Kunststoff, beispielsweise HDPE-MAH, umspritzt werden, um das Liner-Schnittstellenteil 5 auszubilden.Subsequently, preferably in the same tool mold, the
Danach wird das Liner-Schnittstellenteil 5 mit dem Liner 1 verschweißt.The
Das Verfahren kann somit beispielsweise folgende Schritte beinhalten:
Spritzguss des Grundkörpers 4 der Anschlussbaugruppe 2, also des Verteilers und/oder eines Drainageventils, mit einer oder mehreren metallischen Hülsen 6 für Steck oder Schraubverbindung, vorzugsweise aus GFverstärktem Polyamid.The procedure can therefore include, for example, the following steps:
Injection molding of the
Umspritzen des Grundkörpers 4 für das Interface mit modifiziertem (Compatibilizer) HDPE.Overmolding of the
Herstellung des Liners 1 aus HDPE, bevorzugt in einem Blasformprozess.Production of
Verschweißen der Umspritzung des Grundkörpers 4, also des Liner-Schnittstellenteils 5, mit dem Liner 1, beispielsweise durch Laserschweißen.Welding the overmolding of the
- 11
- LinerLiners
- 22
- AnschlussbaugruppeConnection module
- 33
- Schraub-, Steck- oder SchweißverbindungScrew, plug or weld connection
- 44
- GrundkörperBase body
- 55
- Liner-SchnittstellenteilLiner interface part
- 66
- HülseSleeve
Claims (9)
dadurch gekennzeichnet, dass die Anschlussbaugruppe (2), zusätzlich zu einem Grundkörper (4) der Anschlussbaugruppe (2), ein Liner-Schnittstellenteil (5) aufweist, wobei das Liner-Schnittstellenteil (5) als gasdichte Umspritzung des Grundkörpers (4) mit einem ersten Kunststoff ausgebildet ist, wobei das Liner-Schnittstellenteil (5) durch einen Fügeprozess gasdicht mit dem Liner (1) verbunden ist.Composite pressure vessel, comprising an internal liner (1) for receiving a medium, in particular hydrogen, and a shell surrounding the liner (1) made of a fiber-reinforced material, further comprising a connection assembly (2), in particular a valve assembly or distributor assembly, wherein on the one hand the connection assembly (2) is connected to the liner (1) in a gas-tight manner and on the other hand the connection assembly (2) has at least one screw, plug or weld connection (3),
characterized in that the connection assembly (2), in addition to a base body (4) of the connection assembly (2), has a liner interface part (5), wherein the liner interface part (5) is designed as a gas-tight overmolding of the base body (4) with a first plastic, wherein the liner interface part (5) is connected to the liner (1) in a gas-tight manner by a joining process.
dadurch gekennzeichnet , dass der Grundkörper (4) aus einem zweiten Kunststoff besteht, bevorzugt aus Polyamid.Composite pressure vessel according to claim 1,
characterized in that the base body (4) consists of a second plastic, preferably polyamide.
dadurch gekennzeichnet, dass der Grundkörper (4) aus faserverstärktem Kunststoff besteht, bevorzugt mit einer Glasfaserverstärkung.Composite pressure vessel according to at least one of the preceding claims,
characterized in that the base body (4) consists of fiber-reinforced plastic, preferably with glass fiber reinforcement.
dadurch gekennzeichnet , dass die zumindest eine Schraub-, Steck- oder Schweißverbindung (3) der Anschlussbaugruppe (2) durch ein Verbindungselement, bevorzugt eine Hülse (6), gebildet wird und der Grundkörper (4) eine Umspritzung des Verbindungselements, bevorzugt der Hülse (6), bildet, wobei vorzugsweise das Verbindungselement, bevorzugt die Hülse (6), aus Metall besteht.Composite pressure vessel according to at least one of the preceding claims,
characterized in that the at least one screw, plug or weld connection (3) of the connection assembly (2) is formed by a connecting element, preferably a sleeve (6), and the base body (4) forms an overmolding of the connecting element, preferably the sleeve (6), wherein preferably the connecting element, preferably the sleeve (6), consists of metal.
dadurch gekennzeichnet , dass das Liner-Schnittstellenteil (5) als stoffschlüssige Umspritzung des Grundkörpers (4) mit dem ersten Kunststoff ausgebildet ist.Composite pressure vessel according to at least one of the preceding claims,
characterized in that the liner interface part (5) is designed as a material-locking encapsulation of the base body (4) with the first plastic.
dadurch gekennzeichnet , dass der erste Kunststoff ein kompatibilisierter Kunststoff ist, der eine indirekte Verbindung zwischen dem Kunststoff des Liners (1), bevorzugt PE oder HDPE, und dem zweiten Kunststoff des Grundkörpers (4), bevorzugt Polyamid, ermöglicht.Composite pressure vessel according to at least one of the preceding claims,
characterized in that the first plastic is a compatibilized plastic which enables an indirect connection between the plastic of the liner (1), preferably PE or HDPE, and the second plastic of the base body (4), preferably polyamide.
dadurch gekennzeichnet , dass der erste Kunststoff des Liner-Schnittstellenteils (5) mit dem Liner (1) verschweißt ist.Composite pressure vessel according to at least one of the preceding claims,
characterized in that the first plastic of the liner interface part (5) is welded to the liner (1).
dadurch gekennzeichnet , dass ein Grundkörper (4) der Anschlussbaugruppe (2) umspritzt wird mit einem ersten Kunststoff, um das Liner-Schnittstellenteil (5) auszubilden, wobei danach das Liner-Schnittstellenteil (5) durch einen Fügeprozess, bevorzugt durch Verschweißen, mit einem Liner (1) verbunden wird.Method for producing a composite pressure vessel according to at least one of the preceding claims,
characterized in that a base body (4) of the connection assembly (2) is overmolded with a first plastic in order to form the liner interface part (5), wherein the liner interface part (5) is then connected to a liner (1) by a joining process, preferably by welding.
dadurch gekennzeichnet , dass zuerst der Grundkörper (4) als Umspritzung zumindest einer Hülse (6) ausgebildet wird, die eine Schraub-, Steck- oder Schweißverbindung (3) der Anschlussbaugruppe (2) bildet.Method according to claim 8,
characterized in that first the base body (4) is formed as an overmolding of at least one sleeve (6) which forms a screw, plug or welded connection (3) of the connection assembly (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22202977.9A EP4357662A1 (en) | 2022-10-21 | 2022-10-21 | Composite pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22202977.9A EP4357662A1 (en) | 2022-10-21 | 2022-10-21 | Composite pressure vessel |
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| Publication Number | Publication Date |
|---|---|
| EP4357662A1 true EP4357662A1 (en) | 2024-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22202977.9A Pending EP4357662A1 (en) | 2022-10-21 | 2022-10-21 | Composite pressure vessel |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009049948A1 (en) * | 2009-10-19 | 2011-05-19 | Kautex Maschinenbau Gmbh | pressure vessel |
| FR3025565A1 (en) * | 2014-09-04 | 2016-03-11 | Inergy Automotive Systems Res | MONOBLOC INSERT OVERMOLDED WITH A SEALING SYSTEM |
| CN109681769A (en) * | 2017-10-19 | 2019-04-26 | 海控复合材料科技有限公司 | The high pressure resistant storage and transportation gas cylinder of composite material |
| DE102019007820A1 (en) * | 2019-11-11 | 2020-07-16 | Daimler Ag | Device for leveling a weld |
| EP2726773B1 (en) * | 2011-06-28 | 2020-11-04 | Hexagon Ragasco AS | Improved boss for composite container |
| EP4030095A1 (en) * | 2021-01-13 | 2022-07-20 | Magna Energy Storage Systems GesmbH | Method for producing a hollow body |
-
2022
- 2022-10-21 EP EP22202977.9A patent/EP4357662A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009049948A1 (en) * | 2009-10-19 | 2011-05-19 | Kautex Maschinenbau Gmbh | pressure vessel |
| EP2726773B1 (en) * | 2011-06-28 | 2020-11-04 | Hexagon Ragasco AS | Improved boss for composite container |
| FR3025565A1 (en) * | 2014-09-04 | 2016-03-11 | Inergy Automotive Systems Res | MONOBLOC INSERT OVERMOLDED WITH A SEALING SYSTEM |
| CN109681769A (en) * | 2017-10-19 | 2019-04-26 | 海控复合材料科技有限公司 | The high pressure resistant storage and transportation gas cylinder of composite material |
| DE102019007820A1 (en) * | 2019-11-11 | 2020-07-16 | Daimler Ag | Device for leveling a weld |
| EP4030095A1 (en) * | 2021-01-13 | 2022-07-20 | Magna Energy Storage Systems GesmbH | Method for producing a hollow body |
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