WO2022138996A1

WO2022138996A1 - Hydrogen storage tank having non-fixed shape and method for producing same

Info

Publication number: WO2022138996A1
Application number: PCT/KR2020/018827
Authority: WO
Inventors: 김남현
Original assignee: 일진복합소재 주식회사
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2022-06-30
Also published as: KR20220089755A

Abstract

Disclosed are a hydrogen storage tank having a non-fixed shape and a method for producing same. The method for producing a hydrogen storage tank having a non-fixed shape of the present invention comprises the steps of: preparing a liner member used in the hydrogen storage tank having a non-fixed shape; and preparing a strengthening fiber-reinforced layer on the liner member, the strengthening fiber-reinforced layer being prepared by supplying a plurality of strengthening fiber members unidirectionally in the circumferential direction of the liner member by means of a multi-point fiber winding apparatus.

Description

Atypical hydrogen storage tank and manufacturing method thereof

The present invention relates to a hydrogen storage tank, and more particularly, to an atypical hydrogen storage tank to which a small-diameter long-axis liner or a small-diameter continuously produced liner is applied, and a method for manufacturing the same.

An energy system using hydrogen is expected as one of the promising solutions to the global warming problem. In particular, in recent years, research and development on hydrogen-using technology, centering on fuel cells, is rapidly progressing. Hydrogen energy is a secondary energy that can be produced from various energy sources, and at the same time as the cleanest fuel that produces water during combustion, it is energy applicable to household cogeneration, mobile devices, automobiles, industrial power generation, and aerospace industries.

Among them, the application of hydrogen energy to automobiles has the potential to provide great social benefits in terms of its market size, potential CO2 reduction, direct contribution to oil-free dependence, and improvement of industrial competitiveness. However, since hydrogen poses risks in its storage and transportation, and its volumetric energy density is only 1/3000 of that of gasoline, it is a technology to secure safety and compactly transport and store hydrogen in order to mount it in a limited space such as an automobile. establishment is required.

The storage of hydrogen can be divided into solid, gas and liquid storage, and is closely related to the transportation method. The most common method of hydrogen storage technology is to store it in gaseous state. In Korea, there is no large-capacity hydrogen liquefaction plant, and it is highly likely to be used as a fuel for drones and aircraft in the future, so it is necessary to secure essential technology for the development of related industries. is becoming

In order to secure the mileage of a hydrogen electric vehicle, it is essential to secure the amount of hydrogen charged to the vehicle at a certain level or more.

The hydrogen storage tank in which hydrogen is stored must be reinforced with a fiber-reinforced composite material with high specific strength and specific stiffness to withstand the high internal pressure of hydrogen gas, and a liner that maintains gas tightness is inserted inside. The hydrogen storage tank consists of two hemispherical liners joined together to form one storage container, and is joined using a thermal fusion technology, which is a technology for fusion by applying heat to the junction.

The pressure vessel for storing high-pressure hydrogen gas is divided into four types according to the material used and the method of strengthening the composite material. The first type is a metal container made of steel or aluminum. It is a container made to endure, and the second type is a container made by circumferentially winding carbon fiber or glass fiber impregnated with resin on a metal liner made of steel or aluminum. The third type is a container made by winding carbon fiber or glass fiber impregnated with resin on a thin metal liner made of steel or aluminum in the circumferential and longitudinal directions. The metal liner bears no or only a small portion of the load. The fourth type is a container made by winding carbon fiber or glass fiber impregnated with resin on a liner made of a non-metal material in the circumferential and longitudinal directions for the purpose of reducing the weight of the container. It only serves to prevent gas leakage. Hydrogen storage containers used in fuel cell vehicles are mainly of the third type or the fourth type in order to reduce the weight.

The hydrogen storage tank of the first type is a container made of only metal such as steel and aluminum, and the working pressure is determined according to the strength of the metal material and the diameter of the container, and there is a disadvantage in that it is heavy and there is a limitation of the material of the hydrogen storage container.

The second type of hydrogen storage tank is manufactured by reinforcing only the body of the container with a composite material, and by using the composite material for the body, it is possible to reduce the weight of the metal container by reducing the wall thickness. This type is also included in the category of metal containers because the metal material of the container plays a dominant role in strength.

The third type of hydrogen storage tank is a tank manufactured by reinforcing the entire liner (inner container) made of a metal material with a composite material, and the operating pressure is determined according to the composite material reinforced on the outside. This type of hydrogen storage tank is lighter in weight than a metal container, but has a disadvantage in that the durability is not high in the case of a container with a large diameter.

The fourth type of hydrogen storage tank is a tank made by reinforcing the entire liner made of a non-metallic material with a composite material. The composite material reinforced outside rather than the liner inside bears all the pressure. It is the lightest in weight and has excellent durability. And it has the advantage of easy manufacturing of large containers.

The biggest reason for installing the 4th type tank on a hydrogen electric vehicle is for its lifespan and safety. Because the hydrogen is charged at 700 bar high pressure, the tank repeats ‘increased’ and ‘decreased’. On the other hand, the liner of the Type 4 tank is made of plastic material, which has excellent restoring force and is strong against fatigue. In addition, it is designed to withstand fire, shock, and collision by applying a self-gas release system at high temperatures.

On the other hand, in the atypical hydrogen storage tank, a small-diameter long-axis liner or a small-diameter continuously produced liner is used. It is impossible to manufacture an atypical hydrogen storage tank with the one-point filament winding method.

In order to form a fiber reinforcing layer on a continuously produced liner of a small diameter, a long shaft or a small diameter, a braiding method of reinforcing while weaving reinforcing fibers in the circumferential direction in the form of a fabric was conventionally applied.

However, in the braiding method, interference between fibers and fibers occurring in the process of reinforcing fibers in a weaving form cannot be avoided, which causes damage to the reinforcing fibers forming the reinforcing layer.

The above-described technical configuration is a background for helping understanding of the present invention, and does not mean a conventional technique widely known in the technical field to which the present invention pertains.

(Prior art literature)

(Patent Literature)

Korean Patent Publication No. 10-0863643 (Hyundai Motor Co., Ltd.) 2008. 10. 08.

Accordingly, the technical problem to be achieved by the present invention is to minimize the fiber damage of the reinforcing fiber member when the reinforcing fiber reinforcing layer is formed in the process of preparing the reinforcing fiber reinforcing layer of the small-diameter long-axis liner or the small-diameter continuously produced liner. To provide a hydrogen storage tank and a method for manufacturing the same.

According to an aspect of the present invention, the method comprising: providing a liner member applied to an atypical hydrogen storage tank; and providing a reinforcing fiber reinforcing layer on the liner member, wherein the reinforcing fiber reinforcing layer is provided by supplying a plurality of reinforcing fiber members in one direction based on the circumferential direction of the liner member by a multi-point fiber winding device. A method for manufacturing a hydrogen storage tank may be provided.

The plurality of reinforcing fiber members may be supplied in a direction symmetrical to each other.

The reinforcing fiber member may be selected from the group consisting of glass fiber, tannery fiber and aramid fiber.

The multi-point fiber winding device may include: a fiber supply unit provided with a plurality of bobbins on which the reinforcing fiber member is wound; a resin coating unit for coating the reinforcing fiber member supplied from the fiber supply unit with a resin; a liner driving unit for elevating and fixing the liner member; and a fiber winding part for winding the coated reinforcing fiber member supplied from the resin coating part on the outer wall of the liner member.

In addition, according to another aspect of the present invention, as an atypical hydrogen storage tank, an atypical hydrogen storage tank in which a reinforcing fiber member is wound on a liner member by the one method described above may be provided.

In the embodiments of the present invention, the reinforcing fiber reinforcing layer is provided by supplying a plurality of reinforcing fiber members in one direction based on the circumferential direction of the liner member by a multi-point fiber winding device, thereby damaging the fibers of the reinforcing fiber member during the formation of the reinforcing fiber reinforcing layer. can be minimized.

1 is a view schematically showing a main part of an atypical hydrogen storage tank to which an embodiment of the present invention is applied.

2 is a diagram schematically illustrating a multi-point fiber winding device applied to a method for manufacturing an atypical hydrogen storage tank according to an embodiment of the present invention.

FIG. 3 is a schematic plan view of the multi-point fiber winding apparatus shown in FIG. 2 .

4 is a schematic operation diagram of the multi-point fiber winding device shown in FIG. 2 .

5 is a view schematically illustrating one container in which a reinforcing fiber reinforcing layer is provided on an outer wall of a liner member according to the present embodiment.

In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Even if the terms are the same, if the indicated parts are different, it is to be said in advance that the reference numerals do not match.

And, the terms to be described later are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of an operator such as an experimenter and a measurer, so the definition should be made based on the content throughout this specification.

In this specification, terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

The terminology used herein is used only to describe specific embodiments, and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements.

The atypical hydrogen storage tank 1 to which this embodiment is applied, as shown in FIG. 1 , includes a plurality of liner members 11 , and a reinforcing fiber reinforcement layer 12 provided on the outer wall of the liner member 11 , and a plurality of and a connecting portion 13 for connecting the liner member 11 of the .

For the plurality of liner members 11 , a long-axis liner having a small diameter or a continuously produced liner having a small diameter may be used.

In the present embodiment, the plurality of liner members 11 may be made of a material including a mixture of polyamide (PA) resin and copolymer, and high-density polyethylene (HDPE).

The reinforcing fiber reinforcing layer 12 may be provided on the outer walls of the plurality of liner members 11 by a multi-point fiber winding device 1 to be described later.

In this embodiment, the reinforcing fiber reinforcing layer 12 may be provided by supplying a plurality of reinforcing fiber members 130 in one direction with respect to the circumferential direction of the liner member 11 by the multi-point fiber winding device 1, The plurality of reinforcing fiber members 130 may be supplied in a direction symmetrical to each other.

In addition, in the present embodiment, the reinforcing fiber member 130 may be selected from the group including glass fibers, tannery fibers, and aramid fibers.

The connection part 13 may connect the plurality of liner members 11 to provide a passage of hydrogen gas stored in the plurality of liner members 11 .

In this embodiment, a plurality of wrinkle portions may be provided on the outer wall of the connecting portion 13 .

In addition, in the present embodiment, the plurality of wrinkle portions may be continuously provided, and may also be provided on the plurality of liner members 11 described above.

2 is a view schematically showing a multi-point fiber winding device applied to a method for manufacturing an atypical hydrogen storage tank according to an embodiment of the present invention, and FIG. 3 is a schematic diagram of the multi-point fiber winding device shown in FIG. It is a plan view, FIG. 4 is a schematic operation view of the multi-point fiber winding device shown in FIG. 2, and FIG. 5 is a view schematically showing one container in which a reinforcing fiber reinforcing layer is provided on the outer wall of the liner member according to this embodiment to be.

As shown in these drawings, the multi-point fiber winding apparatus 1 according to the present embodiment includes a fiber supply unit 100 provided with a plurality of bobbins 120 on which a reinforcing fiber member 130 is wound, and a fiber supply unit. A resin coating part 200 for coating the reinforcing fiber member 130 supplied from 100 with a resin, a liner driving part 300 for fixing and elevating the liner member 11 , and a resin coating part 200 are supplied. A fiber winding unit 400 for winding the coated reinforcing fiber member 130 to be formed on the outer wall of the liner member 11 is provided.

The fiber supply unit 100 supplies a plurality of reinforcing fiber members 130 , and as shown in FIG. 2 , the support frame 110 and the support frame 110 are provided to rotate and the reinforcing fiber member 130 . ) includes a plurality of bobbins 120 wound around.

In the present embodiment, a driving motor for rotating the plurality of bobbins 120 may be provided in the fiber supply unit 100 .

The resin coating unit 200 is to coat the reinforcing fiber member 130 supplied from the fiber supply unit 100 with a resin, and a reinforcing fiber member ( 130) to coat the reinforcing fiber member 130 by contact transfer. As the synthetic resin, a thermoplastic or thermosetting resin may be used, and the resin may be formulated to have a certain viscosity or higher for adhesion to the liner member 11 . As a method of coating the resin on the surface of the reinforcing fiber member 130 in this embodiment, various known coating methods including gravure coating, reverse coating, slot die coating, and knife coating may be used.

The liner driving unit 300 fixes the liner member 11 and elevates (raises or lowers) the fixed liner member 11 so that a plurality of reinforcing fiber members 130 are wound around the outer wall of the liner member 11 . can make you lose

In this embodiment, as shown in FIG. 2 , the liner driving unit 300 includes a lifting driving member 310 disposed in the space S, and a lifting rod 320 connected to the lifting driving member 310 to be raised and lowered. ), and a base block 330 coupled to the upper end of the lifting rod 320 , a lifting support guide 340 provided on the base block 330 to guide the lifting of the lifting rod 320 , and the base block 330 ). A liner rotation motor 350 provided in the hood to rotate the liner member 11, the upper end is rotatably coupled to the base block 330, and the liner member 11 is coupled to the other end, and is connected to the liner rotation motor 350 The liner support 360 which is rotated and one side supports the liner support 360 to be rotatable, and the other side is coupled to the lifting support guide 340 to be lifted and lowered together with the lifting support guide 340 . includes

In this embodiment, when the liner member 11 is raised and lowered, the elevating driving base material is in a fixed position, and the elevating rod 320 , the base block 330 , the elevating support guide 340 , the liner rotation motor 350 , and the liner supporter 360 and the lifting support 370 may be raised and lowered together with the liner member 11 .

In addition, in this embodiment, the lifting driving member 310 includes a hydraulic cylinder, and the hydraulic cylinder may be provided inside the housing.

The fiber winding unit 400 is provided at the lower portion of the liner member 11 to wind the reinforcing fiber member 130 supplied from the resin supply unit on the outer wall of the liner member 11 that is raised and lowered while rotating.

In the present embodiment, the fiber winding unit 400 includes a fiber supply plate 410 through which a liner entry hole 411 through which a plurality of liner members 11 to be lifted are entered and exited, and a fiber supply plate 410 that is introduced into the fiber supply plate 410 . A fiber branching pin 430 for branching the multi-stranded reinforcing fiber member 130 along the radial direction of the liner access hole 411, and a fiber branched by the fiber branching pin 430 to the liner access hole 411) Includes a fiber guide 440 to guide the interior of the.

The liner access hole 411 of the fiber supply plate 410 is a passage through which the liner member 11 can enter and exit the lower liner insertion space 420 , and is aligned with the lower portion of the liner liner mounted on the liner support 360 . is formed by In addition, a hollow for guiding the liner support 360 may be provided in the center of the fiber supply plate 410 .

The fiber branch pins 430 are arranged at equal intervals along the radial direction of the liner access hole 411 to branch and supply a plurality of reinforcing fiber members 130 with the same number of strands into the liner access hole 411. .

The fiber guide 440 guides the branched reinforcing fiber member 130 to be supplied to the liner access hole 411 , and a hollow through which the reinforcing fiber member 130 passes is formed in the front of the fiber branching pin 430 . provided for each. As the reinforcing fiber members 130 evenly branched along the radial direction of the liner access hole 411 are supplied as described above, the reinforcing fiber members 130 are wound on the surface of the rotating liner member 11 at uniform intervals. can get

4 is a view showing a winding process of the reinforcing fiber member 130 when the liner member 11 is lowered and ascended. Referring to this, the liner member 11 mounted on the liner support 360 by the liner driving unit 300 is shown in FIG. ) is rotated and descends into the liner insertion space 420 through the liner access hole 411, the multi-stranded reinforcing fiber member 130 with adhesiveness coated with a synthetic resin moves into the liner access hole 411 in the radial direction. It is supplied and wound on the surface of the liner member 11 by rotation of the liner member 11 .

In addition, as shown in FIG. 4 , a pair of fiber alignment rings 450 may be provided at upper and lower portions of the liner access hole 411 to be spaced apart. Such a pair of fiber alignment rings 450 supports the strands of the reinforcing fiber member 130 that are wound when the liner member 11 is lowered and ascended so that they can be aligned in the radial direction of the liner member 11, thereby reinforcing fibers. The member 130 may be easily wound around the liner member 11 . As the liner member 11 is repeatedly raised and lowered, a plurality of reinforcing fiber members 130 may be sequentially wound on the surface of the plurality of liner members 11 .

As such, the present invention is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, it should be said that such modifications or variations are included in the claims of the present invention.

Claims

providing a liner member applied to the atypical hydrogen storage tank; and

Comprising the step of providing a reinforcing fiber reinforcement layer on the liner member,

The reinforcing fiber reinforcing layer is a method of manufacturing an atypical hydrogen storage tank provided by supplying a plurality of reinforcing fiber members in one direction based on the circumferential direction of the liner member by a multi-point fiber winding device.
The method according to claim 1,

The plurality of reinforcing fiber members are a method of manufacturing an atypical hydrogen storage tank that is supplied in a direction symmetrical to each other.
The method according to claim 1,

The reinforcing fiber member is a method of manufacturing an atypical hydrogen storage tank selected from the group comprising glass fiber, carbon fiber and aramid fiber.
The method according to claim 1,

The multi-point fiber winding device,

a fiber supply unit provided with a plurality of bobbins on which the reinforcing fiber member is wound;

a resin coating unit for coating the reinforcing fiber member supplied from the fiber supply unit with a resin;

a liner driving unit for elevating and fixing the liner member; and

A method of manufacturing an atypical hydrogen storage tank comprising a fiber winding part for winding the coated reinforcing fiber member supplied from the resin coating part on the outer wall of the liner member.
As an atypical hydrogen storage tank,

An atypical hydrogen storage tank in which a reinforcing fiber member is wound on a liner member by the method of any one of claims 1 to 4.