A multilayer structure for storing hydrogen, including, from the inside, at least one sealing layer and at least one composite reinforcement layer, an innermost composite reinforcement layer being welded to an outermost adjacent sealing layer, the sealing layers being a composition predominantly of: at least one semi-crystalline polyamide thermoplastic polymer P1i, i=1 to n, n being the number of sealing layers, excluding an amide polyether block (PEBA), up to 50% by weight of impact modifier relative to the total weight of the composition, up to 1.5% by weight of plasticizer relative to the total weight of the composition, and at least one of the composite reinforcement layers of a fibrous material in the form of continuous fibers, which is impregnated with a composition predominantly of at least one semi-crystalline polyamide polymer P2j, j=1 to m, m being the number of reinforcement layers.

The invention relates to a method for filling a hydrogen tank (2) of a motor vehicle (1) comprising a fuel cell drive, wherein the method comprises the steps: (a) determining a first operating time at which the motor vehicle (1) is to be started up and an expected first operating location at which the motor vehicle (1) is to be started up, (b) ascertaining a predicted maximum ambient temperature (T.sub.U,max) at the first operating location at the first operating time, and (c) filling the hydrogen tank with hydrogen (3) until a tank pressure (p) in the hydrogen tank (2) reaches a maximum permissible tank pressure (p.sub.max) at a tank temperature (T), wherein the following applies for the tank temperature (T): tank temperature (T)=[maximum ambient temperature (T.sub.U,max); maximum ambient temperature (T.sub.U,max)+10 K]. The invention relates further to a motor vehicle (1) comprising a hydrogen tank (2), a fuel cell drive and a control system (5) for controlling filling of the hydrogen tank (2), wherein the control system (5) to carry out the method.

A motor vehicle includes at least one pressure vessel for storing fuel, and at least one holder for holding the pressure vessel. When installed, the holder encloses one end of the pressure vessel. The holder has a hard shell and an inner layer, wherein at least regions of the inner layer, when installed, are arranged between the hard shell and the connecting element. The hard shell has a higher rigidity than the inner layer.

The present disclosure provides a vehicle having a storage assembly for storing and dispensing a pressurized gas. The storage assembly includes a first storage cylinder section and a second storage cylinder section that each have multiple storage cylinders arranged longitudinally parallel to one another in a first layer and at least in a second layer. The storage cylinders are fluidically connected to one another in a meandering manner by a plurality storage cylinder loops. Each of the storage cylinder loops is connected to an axial end of a storage cylinder disposed in the first layer and an axial end of a storage cylinder disposed in the second layer. The storage assembly includes a cross member frictionally connected to the body of the vehicle and arranged in an interstice defined between the first and second storage cylinder sections.

A high-pressure composite container having a gastight nozzle structure includes a metal nozzle formed at a side of an inlet of a plastic liner layer that defines an inner layer of the high-pressure composite container; a nozzle insert which is inserted into and attached to the metal nozzle in a direction from an inner side of the plastic liner layer to an outer side of the plastic liner layer; and a nut member fixed to an upper end portion of the nozzle insert.

An apparatus for fastening a pair of gas vessels includes: a plurality of first units formed of a composite material, spaced apart from each other in parallel with each other in a length direction of the gas vessel, and having the pair of gas vessels seated on both sides thereof; a second unit formed of a composite material and extending in the length direction of the gas vessels to integrally connect the plurality of first units; and a plurality of fastening units each of which extending along a circumference of the gas vessels to enclose the gas vessels seated on the first units and having both ends connected to the first units.

The present disclosure relates to a thermal pressure relief device for gas pressure tanks and/or gas pressure tank systems, comprising: a valve unit which can be fluidically connected to the gas pressure tank and/or the gas pressure tank system and comprises at least one fluid path, by means of which the gas pressure tank and/or the gas pressure tank system can be drained, in particular a gas stored under high pressure in the gas pressure tank and/or the gas pressure tank system can be discharged into an environment, wherein the valve unit comprises a locking element which can be shifted and/or moved between an open position, in which the gas can flow through the fluid path, and a closed position, in which no gas can flow through the fluid path, and a first trigger means configured to shift and/or move, due to heat impact, in particular when reaching a predetermined temperature, the locking element into the open position and/or to enable the locking element to shift and/or move into the open position, wherein the first trigger means is further configured to detect the heat impact at least at one further location of the gas pressure tank and/or the gas pressure tank system, which is not the installation location of the thermal pressure relief device, and/or to detect the heat impact at least at two spatially separated locations and/or areas, in particular of the gas pressure tank and/or the gas pressure tank system.

The present invention relates to a knob cap for a high-pressure tank including a coupling groove portion corresponding to a knob of a liner of the high-pressure tank formed in a lower surface of a body; a peripheral wing portion extending outward in a lower end of an outer circumferential surface of the body to be in contact with a surface of the liner; and a thickness conversion portion formed in the outer circumferential surface of the body to change a thickness between a center line and the outer circumferential surface.

A hydrogen storage device provided in a vehicle that uses hydrogen as a fuel includes a plurality of receptacles, a plurality of hydrogen tanks, and a flow channel through which hydrogen flows from the receptacles to the hydrogen tanks. The flow channel has a confluence point configured such that the hydrogen merges into one on a downstream side of the plurality of receptacles. The flow channel branches from the confluence point into the plurality of hydrogen tanks.

A pressure vessel for storing fluid is disclosed. The pressure vessel includes a metallic liner comprising a cylindrical portion and a pair of ellipsoidal domes positioned at opposite ends of the cylindrical portion. Further, the pressure vessel includes a composite material wrapped over the cylindrical portion and the pair of ellipsoidal domes. The composite material is formed of a polymeric matrix reinforced with fibers, the composite material comprises of a combination of hoop layers and helical layers which are positioned in predetermined order with respect to each other. A hoop layer is wrapped over a cylindrical portion of the metallic liner of the pressure vessel and a helical layer is wrapped over both the cylindrical portion and the pair of ellipsoidal domes. The helical layer is wrapped on each of the pair of ellipsoidal domes in a manner that a helical angle is defined at an intersection between the cylindrical portion and the pair of ellipsoidal domes.