KR102450257B1 - Small diameter, long length liner of hydrogen storage tank - Google Patents

Small diameter, long length liner of hydrogen storage tank Download PDF

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Publication number
KR102450257B1
KR102450257B1 KR1020200149002A KR20200149002A KR102450257B1 KR 102450257 B1 KR102450257 B1 KR 102450257B1 KR 1020200149002 A KR1020200149002 A KR 1020200149002A KR 20200149002 A KR20200149002 A KR 20200149002A KR 102450257 B1 KR102450257 B1 KR 102450257B1
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KR
South Korea
Prior art keywords
dome
liner
cylinder part
storage tank
hydrogen storage
Prior art date
Application number
KR1020200149002A
Other languages
Korean (ko)
Other versions
KR20220063821A (en
Inventor
허석봉
전상진
허애린
이창욱
Original Assignee
주식회사 에스첨단소재
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Publication date
Application filed by 주식회사 에스첨단소재 filed Critical 주식회사 에스첨단소재
Priority to KR1020200149002A priority Critical patent/KR102450257B1/en
Priority to PCT/KR2021/016024 priority patent/WO2022103086A1/en
Priority to DE112021005956.4T priority patent/DE112021005956T5/en
Publication of KR20220063821A publication Critical patent/KR20220063821A/en
Priority to KR1020220109274A priority patent/KR102515103B1/en
Application granted granted Critical
Publication of KR102450257B1 publication Critical patent/KR102450257B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/79—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling of preformed parts or layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B60K15/067—Mounting of tanks
    • B60K15/07—Mounting of tanks of gas tanks
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03309—Tanks specially adapted for particular fuels
    • B60K2015/03315—Tanks specially adapted for particular fuels for hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B60K2015/0634—Arrangement of tanks the fuel tank is arranged below the vehicle floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/20—Energy converters
    • B60Y2400/202—Fuel cells
    • 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
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    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
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    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • 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
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    • 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
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    • F17C2203/0612—Wall structures
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    • F17C2203/0619—Single wall with two layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2203/00—Vessel construction, in particular walls or details thereof
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    • F17C2203/0634—Materials for walls or layers thereof
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    • F17C2205/01—Mounting arrangements
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    • F17C2205/0134—Two or more vessels characterised by the presence of fluid connection between vessels
    • F17C2205/0142—Two or more vessels characterised by the presence of fluid connection between vessels bundled in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C2205/0146—Two or more vessels characterised by the presence of fluid connection between vessels with details of the manifold
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
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    • F17C2260/018—Adapting dimensions
    • 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
    • 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
    • F17C2270/0173—Railways
    • 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
    • F17C2270/0176—Buses
    • 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
    • F17C2270/0178—Cars
    • 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
    • F17C2270/0184—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
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  • General Engineering & Computer Science (AREA)
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Abstract

본 발명은 연료전지용 수소를 저장하는 소직경 장축 수소저장탱크의 라이너에 관한 것으로, 특히 직경이 작고 길이가 긴 라이너의 각 부분을 그 형상별로 분리하여 제작한 후 이들을 서로 융착한 소직경 장축 수소저장탱크의 라이너에 관한 것이다.The present invention relates to a liner of a small-diameter long-axis hydrogen storage tank for storing hydrogen for a fuel cell. In particular, each part of a small-diameter and long-length liner is separated by its shape and manufactured, and then the small-diameter long-axis hydrogen storage is made by fusion of them. It is about the liner of the tank.

Description

소직경 장축 수소저장탱크의 라이너{SMALL DIAMETER, LONG LENGTH LINER OF HYDROGEN STORAGE TANK}Liner of small-diameter long-axis hydrogen storage tank {SMALL DIAMETER, LONG LENGTH LINER OF HYDROGEN STORAGE TANK}

본 발명은 연료전지용 수소를 저장하는 소직경 장축 수소저장탱크의 라이너에 관한 것으로, 더욱 상세하게는 직경이 작고 길이가 긴 라이너의 각 부분을 그 형상별로 분리하여 제작한 후 이들을 서로 융착한 소직경 장축 수소저장탱크의 라이너에 관한 것이다.The present invention relates to a liner of a small-diameter long-axis hydrogen storage tank for storing hydrogen for a fuel cell, and more particularly, a small-diameter small-diameter liner that is manufactured by separating each part of a small-diameter and long-length liner according to its shape and then fused to each other. It relates to the liner of the long-axis hydrogen storage tank.

수소(Hydrogen)는 우주에서 가장 흔한 원소로 단위 무게당 에너지가 높고, 대량 저장이 가능한 에너지원으로 연료전지와 같은 수소 사이클을 통해 전기를 만들 때 생성되는 부산물이 열과 물 뿐인 무공해 에너지 자원이다.Hydrogen is the most common element in the universe, has high energy per unit weight, and is an energy source that can be stored in large quantities.

이에 최근에는 전세계적인 친환경 에너지의 사용 추세에 맞추어 수소연료전지를 이용한 수소차(승용차, 버스, 기차), 분산형 발전설비, 건물용 보조전력, 수소 선박 및 플라잉카 등이 개발되고 있다.Accordingly, recently, in line with the global trend of using eco-friendly energy, hydrogen vehicles (cars, buses, trains) using hydrogen fuel cells, distributed power generation facilities, auxiliary power for buildings, hydrogen ships and flying cars have been developed.

수소연료전지는 수소를 공기와 반응시켜 전기를 발생시키는 것으로 수소저장탱크를 통해 수소를 공급받는다. 이에 수소저장탱크는 라이너에 수소 유출입 보스를 설치하고, 탄소섬유 등을 감아 고압에 견디도록 강도를 보강한다.Hydrogen fuel cells generate electricity by reacting hydrogen with air. Hydrogen is supplied through a hydrogen storage tank. Accordingly, the hydrogen storage tank is equipped with a hydrogen inflow and outflow boss on the liner, and the strength is reinforced to withstand high pressure by winding carbon fibers.

수소저장탱크 중 소직경 장축 타입의 탱크는 여러개를 병렬 연결하여 대직경 탱크와 동일하거나 그 이상의 용량을 제공하면서도, 전기자동차 플랫폼의 배터리 탑재 공간에도 적용할 수 있게 한다.Among the hydrogen storage tanks, several small-diameter long-axis type tanks are connected in parallel to provide the same or larger capacity as a large-diameter tank, while being applicable to the battery mounting space of an electric vehicle platform.

이러한 소직경 장축 타입의 수소저장탱크에 사용되는 라이너의 제작 방법으로는 일반적으로 사출-압출 융착성형 공법, 회전 성형 공법 및 블로우 성형 공법 등이 있다.As a method of manufacturing a liner used in such a small-diameter long-axis type hydrogen storage tank, there are generally an injection-extrusion fusion molding method, a rotational molding method, a blow molding method, and the like.

그러나 소직경 장축 수소저장탱크의 라이너는 직경이 작으면서도 길이가 길어서 사출성형 공법으로 제작시에는 빼기 구배(draft taper) 등의 필요성으로 인해 두께 및 무게가 증가하는 문제가 있다.However, since the liner of the small-diameter long-axis hydrogen storage tank has a small diameter and a long length, there is a problem in that the thickness and weight increase due to the need for a draft taper when manufactured by the injection molding method.

또한, 라이너의 중심측을 구성하며 관 형상으로 이루어진 실린더부를 압출성형 공법으로 제작할 경우 압출성형의 특성상 물로 냉각을 시키는 과정에서 라이너 소재에서 필연적으로 흡습이 이루어져 융착부의 품질 관리가 어렵다.In addition, in the case of manufacturing the tubular cylinder part constituting the center side of the liner by the extrusion molding method, moisture absorption is inevitably made in the liner material in the process of cooling with water due to the nature of extrusion molding, so quality control of the fusion part is difficult.

또한, 회전성형 공법은 성형틀에 용융원재를 투입 후 고속 회전시키는 방식이기 때문에, 라이너의 양단부를 구성하는 돔(dome) 형상 부분의 성형이 어려워 해당 부분이 불완전한 형상을 갖거나 성형이 불가능한 문제가 있다.In addition, since the rotational molding method is a method of high-speed rotation after inputting the molten raw material into the molding die, it is difficult to form the dome-shaped part constituting both ends of the liner, so that the part has an incomplete shape or is impossible to mold. have.

또한, 블로우성형 공법은 용융상태의 패리슨(parison)이 압출된 후 라이너 성형을 위한 몰드(mold) 사이에 위치시키는 과정에서 냉각되기 때문에, 길이가 긴 소직경 장축 수소저장탱크의 라이너의 성형에는 적합하지 않다.In addition, in the blow molding method, since the parison in the molten state is extruded and then cooled in the process of placing it between molds for liner molding, it is necessary to form a liner of a long small-diameter long-axis hydrogen storage tank. Inappropriate.

이러한 문제점을 해결하기 위해 본 발명을 착안하게 되었으며, 본 발명은 아래와 같은 연구과제로 수행된 결과물이다. In order to solve this problem, the present invention was conceived, and the present invention is a result of the research project as follows.

[과제번호] JIAT-20-3155[task number] JIAT-20-3155

[과제고유번호] 2031550000[Project identification number] 2031550000

[부처명] 산업통상자원부[Ministry name] Ministry of Trade, Industry and Energy

대한민국 등록특허 제10-1922103호Republic of Korea Patent No. 10-1922103

본 발명은 전술한 문제점을 해결하기 위한 것으로, 연료전지용 수소를 저장하는 소직경 장축 수소저장탱크의 라이너를 그 형상별로 실린더부, 제1 돔부 및 제2 돔부로 분리하여 각각 최적의 공법으로 제작한 후 이들을 서로 융착한 소직경 장축 수소저장탱크의 라이너을 제공하고자 한다.The present invention is to solve the above problems, and the liner of a small-diameter long-axis hydrogen storage tank for storing hydrogen for fuel cells is separated into a cylinder part, a first dome part, and a second dome part according to the shape, and each is manufactured by an optimal method. Then, it is intended to provide a liner of a small-diameter long-axis hydrogen storage tank that is fused to each other.

이를 위해, 본 발명에 따른 소직경 장축 수소저장탱크의 라이너는 연료 전지용 수소를 저장하는 것으로, 양단이 개방된 직선관 형상의 실린더부와; 상기 실린더부의 일측 단부에 융착되며, 돔(dome) 형상으로 이루어진 제1 돔부와; 상기 실린더부의 타측 단부에 융착되며, 돔(dome) 형상으로 이루어진 제2 돔부; 및 상기 제1 돔부 및 제2 돔부 중 어느 하나 이상에 결합되며, 수소가 유출입되는 노즐 보스;를 포함하는 것을 특징으로 한다.To this end, the liner of the small-diameter long-axis hydrogen storage tank according to the present invention is to store hydrogen for a fuel cell, and includes a cylinder part having a straight tube shape with both ends open; a first dome portion fused to one end of the cylinder portion and having a dome shape; a second dome part that is fused to the other end of the cylinder part and has a dome shape; and a nozzle boss coupled to at least one of the first dome part and the second dome part, and through which hydrogen flows in and out.

이때, 상기 실린더부, 제1 돔부 및 제2 돔부는 수소가스 투과성이 낮아 수소가스를 저장할 수 있는 합성수지 재질로 이루어져 있는 것이 바람직하다.At this time, it is preferable that the cylinder part, the first dome part, and the second dome part be made of a synthetic resin material capable of storing hydrogen gas due to low hydrogen gas permeability.

또한, 상기 노즐 보스는 금속 재질로 이루어지며 각각 상기 합성수지 재질의 제1 돔부 및 제2 돔부 중 어느 하나 이상에 인서트 사출 성형된 것이 바람직하다.In addition, it is preferable that the nozzle boss is made of a metal material and is insert injection molded into at least one of the first dome part and the second dome part made of the synthetic resin material, respectively.

또한, 상기 실린더부, 제1 돔부 및 제2 돔부는 폴리아미드(Polyamide) 재질로 이루어져 있는 것이 바람직하다.In addition, it is preferable that the cylinder part, the first dome part, and the second dome part are made of a polyamide material.

또한, 상기 실린더부는 다이스(dies)에 용융 원재를 압출시켜 성형하되, 상기 실린더부의 외주면을 덮는 아웃터 쉘(outer shell)을 더 포함하며, 상기 실린더부와 아웃터 쉘을 포함하여 다중층 구조를 형성하는 것이 바람직하다.In addition, the cylinder part is molded by extruding a molten raw material to dies, and further includes an outer shell covering the outer peripheral surface of the cylinder part, and forming a multi-layer structure including the cylinder part and the outer shell it is preferable

또한, 상기 아웃터 쉘은 상기 압출 성형된 실린더부에 냉각수가 유입되지 않도록 방수 기능을 갖는 것이 바람직하다.In addition, it is preferable that the outer shell has a waterproof function so that the coolant does not flow into the extruded cylinder part.

또한, 상기 실린더부의 내주면을 덮는 이너 쉘(inner shell)을 더 포함하며, 상기 실린더부와 이너 쉘을 포함하여 다중층 구조를 형성하는 것이 바람직하다.In addition, it is preferable to further include an inner shell (inner shell) covering the inner circumferential surface of the cylinder portion, and to form a multi-layer structure including the cylinder portion and the inner shell.

또한, 상기 이너 쉘은 가스 배리어(gas barrier) 수지층을 포함하는 것이 바람직하다.In addition, the inner shell preferably includes a gas barrier resin layer.

또한, 상기 이너 쉘은 상기 가스 배리어 수지층의 노출 표면에 적층되는 폴리아미드층을 포함하는 것이 바람직하다.In addition, the inner shell preferably includes a polyamide layer laminated on the exposed surface of the gas barrier resin layer.

한편, 본 발명에 따른 소직경 장축 수소저장탱크의 라이너 제조방법은 연료 전지용 수소를 저장하는 소직경 장축 수소저장탱크의 라이너를 제조하는 것으로, 양단이 개방된 직선관 형상의 실린더부를 성형하는 제1 부분 성형단계와; 돔 형상으로 이루어진 제1 돔부를 성형하는 제2 부분 성형단계와; 돔 형상으로 이루어진 제2 돔부를 성형하는 제3 부분 성형단계와; 상기 제1 돔부를 상기 실린더부의 일측 단부에 융착시키는 제1 융착단계; 및 상기 제2 돔부를 상기 실린더부의 타측 단부에 융착시키는 제2 융착단계;를 포함하는 것을 특징으로 한다.On the other hand, the method for manufacturing a liner of a small-diameter long-axis hydrogen storage tank according to the present invention is to manufacture a liner of a small-diameter long-axis hydrogen storage tank for storing hydrogen for a fuel cell. a partial molding step; a second part forming step of forming a first dome having a dome shape; a third part forming step of forming a second dome having a dome shape; a first welding step of welding the first dome to one end of the cylinder; and a second fusing step of fusing the second dome part to the other end of the cylinder part.

이때, 상기 제1 부분 성형단계는 다이스에 용융 원재를 압출시켜 상기 실린더부를 성형하되, 다중층 압출 성형기에 의해 상기 실린더부의 외주면을 덮은 아웃터 쉘을 포함하여 다중층 구조로 압출 성형하는 단계인 것이 바람직하다.In this case, the first partial molding step is a step of extruding the molten raw material to a die to shape the cylinder part, and extrusion molding into a multi-layer structure including an outer shell covering the outer circumferential surface of the cylinder part by a multi-layer extrusion molding machine. do.

또한, 상기 압출 성형된 다중층 구조의 외표면에 냉각수를 분사하는 냉각단계; 및 상기 냉각단계 이후 상기 아웃터 쉘을 제거하는 쉘 제거단계;를 더 포함하는 것이 바람직하다.In addition, a cooling step of spraying cooling water to the outer surface of the extrusion-molded multi-layer structure; and a shell removing step of removing the outer shell after the cooling step.

또한, 상기 제1 부분 성형단계는 상기 실린더부의 내주면을 덮는 이너 쉘(inner shell)을 포함하여 다중층 구조를 형성하는 단계인 것이 바람직하다.In addition, it is preferable that the first partial molding step is a step of forming a multi-layer structure including an inner shell covering the inner circumferential surface of the cylinder part.

이상과 같은 본 발명은 다수의 수소저장탱크를 병렬로 연결하여 사용 가능하게 하는 소직경 장축 수소저장탱크의 라이너를 제공한다. 또한 소직경 장축 수소저장탱크의 라이너를 그 형상별로 직선관 형상의 실린더부와 돔 형상의 제1 돔부 및 제2 돔부로 분리하여 각각 최적의 공법으로 제작한 후 이들을 서로 융착하여 라이너 특성을 향상시키면서도 제조비용 및 시간을 절감할 수 있게 한다.The present invention as described above provides a liner of a small-diameter long-axis hydrogen storage tank that can be used by connecting a plurality of hydrogen storage tanks in parallel. In addition, the liner of the small-diameter long-axis hydrogen storage tank is separated into a straight tube-shaped cylinder part and dome-shaped first and second dome parts for each shape and manufactured by an optimal method, and then fused to each other to improve the liner characteristics while improving the liner characteristics. It can reduce manufacturing cost and time.

도 1은 본 발명에 따른 소직경 장축 수소저장탱크의 라이너를 나타낸 분해 사시도이다.
도 2는 본 발명에 따른 소직경 장축 수소저장탱크의 배치 상태도이다.
도 3은 본 발명에 따른 소직경 장축 수소저장탱크를 수소차에 적용한 도이다.
도 4는 본 발명의 아웃터 쉘을 나타낸 도이다.
도 5는 본 발명에 적용 가능한 멀티레이어 압출기를 나타낸 도이다.
도 6은 본 발명의 이너 쉘을 나타낸 도이다.
도 7은 본 발명에 따른 소직경 장축 수소저장탱크의 라이너 제조방법을 나타낸 흐름도이다.1 is an exploded perspective view showing a liner of a small-diameter long-axis hydrogen storage tank according to the present invention.
2 is an arrangement state diagram of a small-diameter long-axis hydrogen storage tank according to the present invention.
3 is a diagram illustrating a small-diameter long-axis hydrogen storage tank according to the present invention applied to a hydrogen vehicle.
4 is a view showing the outer shell of the present invention.
5 is a view showing a multi-layer extruder applicable to the present invention.
6 is a view showing the inner shell of the present invention.
7 is a flowchart illustrating a method for manufacturing a liner of a small-diameter long-axis hydrogen storage tank according to the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 소직경 장축 수소저장탱크의 라이너에 대해 상세히 설명한다.Hereinafter, a liner of a small-diameter long-axis hydrogen storage tank according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1과 같이, 본 발명에 따른 소직경 장축 수소저장탱크의 라이너(10)는 연료 전지용 수소를 저장하였다가 연료 전지 시스템(스택)에 공급하기 위한 것으로, 실린더부(11), 제1 돔부(12), 제2 돔부(13) 및 노즐 보스(14)를 포함한다.As shown in Figure 1, the liner 10 of the small-diameter long-axis hydrogen storage tank according to the present invention is for storing hydrogen for a fuel cell and supplying it to the fuel cell system (stack), the cylinder part 11, the first dome part ( 12), a second dome portion 13, and a nozzle boss 14.

도 2와 같이, 소직경 장축 수소저장탱크(HT)는 공급 용량에 따라 매니폴드(MF)를 통해 다수개를 연결하여 사용하며, 제조사에 따라 다르지만 통상적으로 직경과 길이의 비율이 1 : 10~20로 직경이 작고 길이가 길다. 따라서 수소저장탱크(HT)의 직경이 작아서 동일한 설치 공간에 더 많은 용량으로 설치가 가능하다.As shown in FIG. 2, a large number of small-diameter long-axis hydrogen storage tanks (HT) are connected and used through a manifold (MF) depending on the supply capacity, and although it varies depending on the manufacturer, the ratio of diameter and length is usually 1:10~ 20, small in diameter and long. Therefore, since the diameter of the hydrogen storage tank (HT) is small, it can be installed with a larger capacity in the same installation space.

도 3과 같이, 실시예로 소직경 장축 수소저장탱크(HT)는 전기차 플랫폼에 설치시 배터리 팩을 위한 설계 공간의 변형없이 수소저장탱크(HT)를 대체하여 설치할 수 있게 한다. 따라서, 공간 활용, 공간 전용 및 모듈화에 유리하다.As shown in FIG. 3 , the small-diameter long-axis hydrogen storage tank (HT) can be installed in place of the hydrogen storage tank (HT) without modification of the design space for the battery pack when installed on the electric vehicle platform. Therefore, it is advantageous for space utilization, space diversion and modularization.

특히, 본 발명은 라이너(10)를 구성하는 각 부분의 형상별로 직선관이나 원통 형상의 실린더부(11)와 돔 형상의 제1 돔부(12) 및 제2 돔부(13)로 분리하여 각각 최적의 공법으로 제작한 후 이들을 서로 융착한다. 따라서, 라이너 특성을 향상시키면서도 제조비용 및 제조시간을 절감할 수 있게 한다.In particular, according to the shape of each part constituting the liner 10 , the present invention is divided into a straight tube or a cylindrical cylinder 11 and a dome-shaped first dome 12 and a second dome 13 , respectively. After they are manufactured by the method of Accordingly, it is possible to reduce manufacturing cost and manufacturing time while improving liner properties.

이를 위해, 실린더부(11)는 양단이 개방된 직선관 형상으로 이루어진다. 실린더부(11)는 제1 돔부(12) 및 제2 돔부(13)와 별개로 단독 제작되므로, 직선관의 성형에 유리한 공법으로 제작할 수 있다. 예컨대, 사출성형아니 압출성형을 통해 실린더부(11)를 제작한다.To this end, the cylinder part 11 is formed in the shape of a straight tube with both ends open. Since the cylinder part 11 is independently manufactured from the first dome part 12 and the second dome part 13, it can be manufactured by a method advantageous for forming a straight pipe. For example, the cylinder part 11 is manufactured through injection molding or extrusion molding.

제1 돔부(12)는 소직경 장축 수소저장탱크의 라이너(10)의 일단부를 구성하는 것으로 돔(dome) 형상으로 이루어진다. 이러한 제1 돔부(12)는 그 내측 방향이 실린더부(11)의 일측 단부에 형상 맞춤으로 융착된다.The first dome portion 12 constitutes one end of the liner 10 of the small-diameter long-axis hydrogen storage tank and has a dome shape. The first dome portion 12 is fusion-bonded in its inner direction to one end of the cylinder portion 11 in a shape-fitting manner.

제2 돔부(13)는 소직경 장축 수소저장탱크의 라이너(10)의 타단부를 구성하는 것으로 마찬가지로 돔 형상으로 이루어진다. 또한 제2 돔부(13)는 그 내측 방향이 실린더부(11)의 타측 단부에 형상 맞춤으로 융착된다.The second dome portion 13 constitutes the other end of the liner 10 of the small-diameter long-axis hydrogen storage tank and has a dome shape as well. In addition, the inner direction of the second dome portion 13 is fused to the other end of the cylinder portion 11 in a shape-fitting manner.

제1 돔부(12)와 제2 돔부(13) 역시 각각 실린더부(11)와는 별개로 제작되므로, 돔 형상에 적합한 공법으로 제작이 가능하다. 예컨대, 제1 돔부(12)와 제2 돔부(13)는 각각 사출성형 공법으로 제작된다.Since the first dome part 12 and the second dome part 13 are also manufactured separately from the cylinder part 11, it is possible to manufacture by a method suitable for the dome shape. For example, the first dome portion 12 and the second dome portion 13 are each manufactured by an injection molding method.

다만, 본 발명에서 제1 돔부(12) 및 제2 돔부(13)는 소직경 장축 수소저장탱크의 라이너(10)의 길이 방향 말단을 의미하는 것므로, 제1 돔부(12) 및 제2 돔부(13)를 정의하는 돔 형상은 온전한 반구 형상으로부터 변형된 형상도 포함한다.However, in the present invention, since the first dome portion 12 and the second dome portion 13 mean the longitudinal ends of the liner 10 of the small-diameter long-axis hydrogen storage tank, the first dome portion 12 and the second dome portion The dome shape defining (13) includes a shape deformed from an intact hemispherical shape.

노즐 보스(14)는 제1 돔부(12) 및 제2 돔부(13) 중 어느 하나 이상에 결합된다. 즉, 용도나 용량 등에 따라 제1 돔부(12) 또는 제2 돔부(13)에 결합되거나 혹은 이들 모두에 결합된다.The nozzle boss 14 is coupled to at least one of the first dome portion 12 and the second dome portion 13 . That is, it is coupled to the first dome part 12 or the second dome part 13, or both, depending on the use or capacity.

노즐 보스(14)는 에너지원인 수소가 유출입되는 관로를 제공하는 것으로 금속 재질로 이루어진다. 금속 재질의 노즐 보스(14)는 매니폴드(MF)나 각종 밸브 등에 연결된다.The nozzle boss 14 provides a pipe through which hydrogen, which is an energy source, flows in and out, and is made of a metal material. The metal nozzle boss 14 is connected to the manifold MF or various valves.

따라서, 노즐 보스(14)가 결합된 제1 돔부(12) 및 제2 돔부(13)는 각각 실린더부(11)의 양측 말단에 융착되어 일체의 라이너(10)를 구성하게 된다. 나아가 라이너(10)에는 열경화성수지나 열가소성수지를 함침시킨 탄소섬유 등을 감아 강도를 보강한다.Accordingly, the first dome portion 12 and the second dome portion 13 to which the nozzle boss 14 is coupled are fused to both ends of the cylinder portion 11 , respectively, to constitute the integral liner 10 . Further, the liner 10 is wound with a carbon fiber impregnated with a thermosetting resin or a thermoplastic resin to reinforce the strength.

이때, 실린더부(11), 제1 돔부(12) 및 제2 돔부(13)는 무게를 줄이면서도 성형이 용이하도록 합성수지 재질로 제작하는 것이 바람직하다. 특히 합성수지 중 수소가스 투과성이 낮아 수소가스를 저장할 수 있는 합성수지를 채택한다.At this time, it is preferable that the cylinder part 11, the first dome part 12 and the second dome part 13 are made of a synthetic resin material to reduce weight and facilitate molding. In particular, among synthetic resins, a synthetic resin that can store hydrogen gas is adopted due to its low hydrogen gas permeability.

수소는 작은 분자크기로 인해 높은 투과도를 갖기 때문에, 이러한 수소를 저장할 수 있도록 가스 투과성이 낮은 합성수지를 성형하여 실린더부(11), 제1 돔부(12) 및 제2 돔부(13)를 제작한다.Since hydrogen has high permeability due to its small molecular size, the cylinder part 11, the first dome part 12, and the second dome part 13 are manufactured by molding a synthetic resin with low gas permeability to store such hydrogen.

합성수지는 폴리케톤(PK), 폴리옥시메틸렌(POM, 폴리아세탈), 폴리에틸렌(PE), 고밀도 폴리에틸렌(HDPE), 폴리아미드(PA, 나일론) 및 강화 폴리아미드를 비롯하여 수소의 투과를 차단하거나 최소화하는 고분자 소재가 적용될 수 있다.Synthetic resins include polyketone (PK), polyoxymethylene (POM, polyacetal), polyethylene (PE), high-density polyethylene (HDPE), polyamide (PA, nylon), and reinforced polyamide that block or minimize the permeation of hydrogen. A polymer material may be applied.

그 중 폴리아미드는 아마이드 결합을 가지는 고분자 화합물로 고강도, 내마모성, 내열성 및 내한성이 뛰어남은 물론, 매우 작은 분자 크기의 수소 가스에 대해서도 투과도가 매우 낮아 수소 저장에 유리하다.Among them, polyamide is a high molecular compound having an amide bond, and has excellent high strength, abrasion resistance, heat resistance and cold resistance.

따라서, 실린더부(11), 제1 돔부(12) 및 제2 돔부(13)는 폴리아미드를 이용하여 각각의 형상에 최적화된 공법으로 성형하고, 이들을 단부가 서로 맞닿도록 형상 맞춤으로 융착하여 라이너(10)를 제공한다.Therefore, the cylinder part 11, the first dome part 12, and the second dome part 13 are molded by a method optimized for each shape using polyamide, and they are fusion-bonded so that the ends abut each other to form a liner. (10) is provided.

노즐 보스(14)는 금속 재질로 이루어진다. 노즐 보스(14)는 실시예로 수소가 유출입되는 관 부를 갖도록 알루미늄 빌릿(billet)을 절단 후 단조 성형하여 모양을 갖추고, 열처리를 통해 물성을 향상시킨다.The nozzle boss 14 is made of a metal material. The nozzle boss 14 is shaped by forging after cutting an aluminum billet to have a tube portion through which hydrogen flows in and out, and improves physical properties through heat treatment.

또한, 노즐 보스(14)는 라이너의 길이 방향 단부 즉, 제1 돔부(12)나 제2 돔부(13) 중 어느 하나 이상에 구비되는 것으로, 금속 재질의 노즐 보스(14)는 합성수지 재질의 제1 돔부(12)나 제2 돔부(13)에 결합된다.In addition, the nozzle boss 14 is provided at the longitudinal end of the liner, that is, at least one of the first dome portion 12 and the second dome portion 13, and the nozzle boss 14 made of a metal material is made of a synthetic resin material. It is coupled to the first dome portion 12 or the second dome portion 13 .

결합을 위해 돔부(제1 돔부 및/또는 제2 돔부)에 대응하는 성형 몰드의 인서트 캐비티(insert cavity) 내에 노즐 보스(14)를 삽입 후 용융 합성수지를 주입함으로써 돔부에 노즐 보스(14)가 결합되는 인서트 사출 공법이 적용된다.For bonding, the nozzle boss 14 is inserted into the insert cavity of the molding mold corresponding to the dome portion (the first dome portion and/or the second dome portion) and then the molten synthetic resin is injected to the dome portion. Insert injection method is applied.

한편, 도 4를 참조하면, 실린더부(11)는 아웃터 쉘(outer shell, 11-O)을 더 포함할 수 있다. 아웃터 쉘(11-O)은 관 형상의 실린더부(11)에 기능성을 부여하는 층으로 실린더부(11)의 외주면에 밀착 적층되어 외주면을 덮는다.Meanwhile, referring to FIG. 4 , the cylinder part 11 may further include an outer shell 11-O. The outer shell 11-O is a layer that imparts functionality to the tubular cylinder portion 11 and is closely stacked on the outer circumferential surface of the cylinder portion 11 to cover the outer circumferential surface.

도 5와 같이, 멀티레이어 압출 성형기(20)를 적용하면 다이스(dies, 21)에 각각의 용융 원재를 압출할 수 있으며, 실린더부(11)에 아웃터 쉘(11-O)이 적층된 다층 구조를 형성한다.As shown in FIG. 5 , when the multi-layer extruder 20 is applied, each molten raw material can be extruded to the dies 21 , and the outer shell 11-O is stacked on the cylinder part 11 in a multi-layer structure to form

아웃터 쉘(11-O)은 기능성의 일 예로 압출 성형된 실린더부(11)에 냉각수가 유입되지 않도록 방수 기능을 제공한다. 따라서, 용융 원재를 압출 성형 후 냉각을 위해 냉각수를 분사시 아웃터 쉘(11-O)이 방수층 역할을 한다.The outer shell 11-O provides a waterproof function so that coolant does not flow into the extruded cylinder part 11 as an example of functionality. Therefore, the outer shell 11-O serves as a waterproof layer when cooling water is sprayed for cooling after extrusion molding of the molten raw material.

특히, 실린더부(11)를 폴리아미드(PA)로 성형하는 경우, 폴리아미드(PA)는 수소 투과도가 낮아 수소 저장에 용이한 반면, 흡습 특성이 뛰어나다. 따라서, 폴리아미드 실린더부(11)를 압출 후 냉각수로 냉각하면 냉각수를 흡수하게 된다.In particular, when the cylinder part 11 is molded of polyamide (PA), the polyamide (PA) has a low hydrogen permeability and is easy to store hydrogen, but has excellent moisture absorption properties. Therefore, when the polyamide cylinder part 11 is cooled with cooling water after extrusion, the cooling water is absorbed.

냉각수를 흡수한 폴리아미드 실린더부(11)는 그 양단부에 결합되는 제1 돔부(12) 및 제2 돔부(13)와의 열융착이 이루어지 않기 때문에 제작이 어렵거나 불량이 발생한다.Since the polyamide cylinder part 11 that has absorbed the cooling water is not heat-sealed with the first dome part 12 and the second dome part 13 coupled to both ends thereof, manufacturing is difficult or defective.

그러므로, 냉각수를 분사하는 실린더부(11)의 외주면에 방수 기능의 아웃터 쉘(11-O)을 더 포함하여, 그 내측에 배치된 실린더부(11)에서 냉각수를 흡수(흡습)하는 것을 방지할 수 있도록 한다.Therefore, by further including an outer shell 11-O having a waterproof function on the outer circumferential surface of the cylinder unit 11 for spraying the cooling water, the cylinder unit 11 disposed inside the cylinder unit 11 can prevent absorption (moisture absorption) of the cooling water. make it possible

방수 기능을 갖는 기능성 아웃터 쉘(11-O) 역시 합성수지 재질이 적용될 수 있으며, 방수 기능을 제공하는 합성수지에는 폴리에틸렌(PE)도 포함된다. A synthetic resin material may also be applied to the functional outer shell 11-O having a waterproof function, and the synthetic resin providing a waterproof function includes polyethylene (PE).

다만, 후속 공정으로 라이너(10)에 탄소 섬유를 감는데 이용되는 에폭시 접착제는 폴리에틸렌(PE)과의 부착되지 않기 때문에 냉각수 분사 이후에는 실린더부(11)가 외부로 노출되도록 제거되어야 한다.However, since the epoxy adhesive used to wind the carbon fiber on the liner 10 as a subsequent process does not adhere to the polyethylene (PE), it must be removed so that the cylinder part 11 is exposed to the outside after the coolant is sprayed.

따라서, 방수 기능과 함께 에폭시 접착제 부착 성능이 뛰어난 합성수지를 아웃터 쉘(11-O)에 적용하면, 냉각수 분사 이후에도 아웃터 쉘(11-O)을 제거할 필요없이 기능성을 유지할 수 있게 된다.Therefore, if a synthetic resin excellent in adhesion performance with an epoxy adhesive with a waterproof function is applied to the outer shell 11-O, the functionality can be maintained without the need to remove the outer shell 11-O even after the cooling water is sprayed.

방수 기능과 함께 압출 성형이 가능한 합성수지로는 에폭시 수지가 있다. 아웃터 쉘(11-O)을 구성하는 에폭시 수지는 라이너(10)에 감는 탄소 섬유 접착용 에폭시와 혼합되어 결합력을 더욱 높인다. 그 외 유리섬유 강화 폴리아미드 등도 방수 기능을 가지면서 강도를 보강하는 아웃터 쉘(11-O)로 사용할 수 있다.Epoxy resin is a synthetic resin that can be extruded with a waterproof function. The epoxy resin constituting the outer shell 11-O is mixed with the carbon fiber bonding epoxy wound around the liner 10 to further increase bonding strength. In addition, glass fiber reinforced polyamide can be used as an outer shell (11-O) that has a waterproof function and reinforces strength.

도 6을 참조하며, 실린더부(11)는 이너 쉘(inner shell, 11-I)을 포함할 수 있다. 이너 쉘(11-I) 역시 관 형상의 실린더부(11)에 기능성을 부여하는 층으로 실린더부(11)의 내주면에 밀착 적층되어 내주면을 덮는다.Referring to FIG. 6 , the cylinder part 11 may include an inner shell 11-I. The inner shell 11-I is also a layer that imparts functionality to the tubular cylinder part 11 and is closely stacked on the inner peripheral surface of the cylinder part 11 to cover the inner peripheral surface.

이를 위해 이너 쉘(11-I)은 실린더부(11)보다 직경이 작은 관 형상으로 이루어진다. 실린더부(11)에 이너 쉘(11-I)이 적층된 다층 구조를 위해, 실시예로서 실린더부(11)의 내주면에 접착제를 도포 후 별도로 제작된 이너 쉘(11-I)을 부착할 수 있다. 다만, 이너 쉘(11-I) 역시 재질이나 공법에 따라 실린더부(11)와 함께 압출 성형될 수 있다.To this end, the inner shell 11-I is formed in a tubular shape having a diameter smaller than that of the cylinder part 11 . For a multi-layer structure in which the inner shell 11-I is laminated on the cylinder part 11, as an embodiment, after applying an adhesive to the inner peripheral surface of the cylinder part 11, a separately manufactured inner shell 11-I may be attached. have. However, the inner shell 11-I may also be extrusion-molded together with the cylinder part 11 according to a material or a method.

이때, 이너 쉘(11-I)은 가스 배리어 수지층(11a)을 포함할 수 있다. 가스 배리어 수지층(11a)은 수소의 투과를 차단하는 것으로, 바람직하게는 에틸렌비닐알코올(EVOH)나 이를 포함하는 합성수지가 적용될 수 있다.In this case, the inner shell 11-I may include the gas barrier resin layer 11a. The gas barrier resin layer 11a blocks the permeation of hydrogen, and preferably, ethylene vinyl alcohol (EVOH) or a synthetic resin containing the same may be applied.

또한, 이너 쉘(11-I) 자체도 다층 구조로 구성될 수 있으며, 이 경우 이너 쉘(11-I)은 가스 배리어 수지층(11a)의 노출 표면에 적층되는 폴리아미드층(11b)을 포함하는 것이 바람직하다.In addition, the inner shell 11-I itself may also have a multi-layer structure. In this case, the inner shell 11-I includes a polyamide layer 11b laminated on the exposed surface of the gas barrier resin layer 11a. It is preferable to do

예컨대, 라이너는 외부 극한 환경이나 수소의 온도 변화에 대응하여 -45℃~85℃의 범위의 온도에서도 견딜 수 있어야 하므로, 습도와 온도에 민감한 에틸렌비닐알코올 층(11a)의 표면에 폴리아미드층(11b)을 추가로 적층한다.For example, since the liner must be able to withstand a temperature in the range of -45 ° C to 85 ° C in response to an external extreme environment or temperature change of hydrogen, a polyamide layer ( 11b) is further laminated.

이상과 같은 본 발명은 다수의 연료전지탱크를 연결하여 사용할 수 있는 소직경 장축 수소저장탱크의 라이너(10)를 제공한다. The present invention as described above provides a liner 10 of a small-diameter long-axis hydrogen storage tank that can be used by connecting a plurality of fuel cell tanks.

또한 소직경 장축 수소저장탱크의 라이너(10)를 그 형상별로 직선관 형상의 실린더부(11)와 돔 형상의 제1 돔부(12) 및 제2 돔부(13)로 분리하여 각각 최적의 공법으로 제작한 후 이들을 서로 융착하여 라이너(10)를 공급한다.In addition, the liner 10 of the small-diameter long-axis hydrogen storage tank is separated into a straight tube-shaped cylinder part 11 and a dome-shaped first dome part 12 and a second dome part 13 for each shape, each using an optimal method. After manufacturing, they are fused to each other to supply the liner 10 .

또한, 직선관 형상의 실린더부(11)는 돔 구조를 포함하지 않고 형상이 단순하여 별도 제작에 유리하므로, 아웃터 쉘(11-O)이나 이너 쉘(11-I)과 같은 기능성 층을 선택하여 적층하거나 이들 모두를 적층하여 성능을 향상시킬 수 있다.In addition, since the straight tube-shaped cylinder part 11 does not include a dome structure and has a simple shape, which is advantageous for separate production, by selecting a functional layer such as the outer shell 11-O or the inner shell 11-I, The performance can be improved by stacking them or by stacking them both.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 소직경 장축 수소저장탱크의 라이너 제조방법에 대해 상세히 설명한다. Hereinafter, a method for manufacturing a liner of a small-diameter long-axis hydrogen storage tank according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 7과 같이, 본 발명에 따른 소직경 장축 수소저장탱크의 라이너 제조방법은 연료 전지용 수소를 저장하는 소직경 장축 수소저장탱크의 라이너(10)를 제조하는 것으로, 제1 부분 성형단계(S11), 제2 부분 성형단계(S12), 제3 부분 성형단계(S13), 제1 융착단계(S14) 및 제2 융착단계(S15)를 포함한다.7, the method for manufacturing a liner of a small-diameter long-axis hydrogen storage tank according to the present invention is to manufacture a liner 10 of a small-diameter long-axis hydrogen storage tank for storing hydrogen for a fuel cell, a first partial molding step (S11) , a second partial molding step (S12), a third partial molding step (S13), a first fusion step (S14) and a second fusion step (S15).

소직경 장축 수소저장탱크의 라이너(10)는 공급 용량에 따라 매니폴드(MF)를 통해 다수개를 연결하여 사용하는 것으로, 라이너(10)의 직경이 작아서 동일한 설치 공간에 더 많은 용량으로 설치가 가능하다.The liner 10 of the small-diameter long-axis hydrogen storage tank is used by connecting a plurality of lines through the manifold (MF) according to the supply capacity. It is possible.

특히, 본 발명은 라이너(10)를 구성하는 각 부분의 형상별로 직선관이나 원통 형상의 실린더부(11)와 돔 형상의 제1 돔부(12) 및 제2 돔부(13)로 분리하여 각각 최적의 공법으로 제작한 후 이들을 서로 융착한다. 따라서, 라이너 특성을 향상시키면서도 제조비용 및 제조시간을 절감할 수 있게 한다.In particular, according to the shape of each part constituting the liner 10 , the present invention is divided into a straight tube or a cylindrical cylinder 11 and a dome-shaped first dome 12 and a second dome 13 , respectively. After they are manufactured by the method of Accordingly, it is possible to reduce manufacturing cost and manufacturing time while improving liner properties.

이를 위해, 상기 제1 부분 성형단계(S11)에서는 양단이 개방된 직선관 형상(혹은 원통 형상)의 실린더부(11)를 성형한다. To this end, in the first partial forming step (S11), the cylinder part 11 of a straight tube shape (or cylindrical shape) with both ends open is molded.

실린더부(11)는 제1 돔부(12) 및 제2 돔부(13)와 별개로 단독 제작되므로, 직선관만의 단독 성형에 유리한 공법으로 제작할 수 있다. 예컨대, 사출성형아니 압출성형을 통해 실린더부(11)를 제작한다.Since the cylinder part 11 is manufactured separately from the first dome part 12 and the second dome part 13, it can be manufactured by a method advantageous for single molding of a straight pipe only. For example, the cylinder part 11 is manufactured through injection molding or extrusion molding.

제2 부분 성형단계(S12)에서는 돔 형상으로 이루어진 제1 돔부(12)를 성형한다. 제1 돔부(12)는 소직경 장축 수소저장탱크의 라이너(10)의 일단부를 구성하는 것으로 돔(dome) 형상으로 이루어진다. In the second partial forming step ( S12 ), the first dome portion 12 having a dome shape is formed. The first dome portion 12 constitutes one end of the liner 10 of the small-diameter long-axis hydrogen storage tank and has a dome shape.

제1 돔부(12)는 상기한 실린더부(11)와는 별개로 제작되므로, 돔 형상에 적합한 공법으로 제작이 가능하다. 예컨대, 제1 돔부(12)는 사출성형 공법으로 제작된다.Since the first dome part 12 is manufactured separately from the above-described cylinder part 11, it is possible to manufacture it by a method suitable for the dome shape. For example, the first dome portion 12 is manufactured by an injection molding method.

제3 부분 성형단계(S13)에서는 돔 형상으로 이루어진 제2 돔부(13)를 성형한다. 제2 돔부(13)는 소직경 장축 수소저장탱크의 라이너(10)의 타단부를 구성하는 것으로 마찬가지로 돔 형상으로 이루어진다. In the third partial forming step ( S13 ), the second dome portion 13 having a dome shape is formed. The second dome portion 13 constitutes the other end of the liner 10 of the small-diameter long-axis hydrogen storage tank and has a dome shape as well.

제2 돔부(13) 역시 상기한 실린더부(11)와는 별개로 제작되므로, 돔 형상에 적합한 공법으로 제작이 가능하다. 예컨대, 제2 돔부(12)는 사출성형 공법으로 제작된다. Since the second dome part 13 is also manufactured separately from the above-described cylinder part 11, it can be manufactured by a method suitable for the dome shape. For example, the second dome portion 12 is manufactured by an injection molding method.

다만, 실린더부(11), 제1 돔부(12) 및 제2 돔부(13)는 순차로 성형 제작되거나 혹은 동시에 성형이 진행될 수 있다. 따라서, 제1 부분 성형단계(S11) 내지 제3 부분 성형단계(S13)는 그 순서에 특별한 제한은 없다.However, the cylinder part 11 , the first dome part 12 , and the second dome part 13 may be sequentially molded or molded at the same time. Accordingly, the order of the first partial forming step (S11) to the third partial forming step (S13) is not particularly limited.

이를 통해 본 발명은 라이너를 구성하는 각 부분의 형상별로 직선관이나 원통 형상의 실린더부(11)와 돔 형상의 제1 돔부(12) 및 제2 돔부(13)로 분리하여 각각 최적의 공법으로 제작한다.Through this, the present invention separates the linear tube or cylindrical cylinder part 11 and the dome-shaped first dome part 12 and the second dome part 13 according to the shape of each part constituting the liner, each with an optimal method. produce

제1 돔부(12) 및 제2 돔부(13) 성형시 노즐 보스를 함께 성형할 수 있다. 이를 위해 노즐 보스 성형시 수소가 유출입되는 노즐 보스(14)를 제1 돔부(12) 및 제2 돔부(13) 중 어느 하나 이상에 결합시킨다. 즉, 용도나 용량 등에 따라 제1 돔부(12) 또는 제2 돔부(13)에 결합되거나 혹은 이들 모두에 결합된다.When the first dome portion 12 and the second dome portion 13 are formed, the nozzle boss may be formed together. To this end, when forming the nozzle boss, the nozzle boss 14 through which hydrogen flows is coupled to at least one of the first dome portion 12 and the second dome portion 13 . That is, it is coupled to the first dome part 12 or the second dome part 13, or both, depending on the use or capacity.

노즐 보스(14)는 에너지원인 수소가 유출입되는 관로를 제공하는 것으로 금속 재질로 이루어진다. 금속 재질의 노즐 보스(14)는 매니폴드(MF)나 각종 밸브 등에 연결되는 것이다.The nozzle boss 14 provides a pipe through which hydrogen, which is an energy source, flows in and out, and is made of a metal material. The metal nozzle boss 14 is connected to the manifold MF or various valves.

노즐 보스(14)는 실시예로 수소가 유출입되는 관 부를 갖도록 알루미늄 빌릿(billet)을 절단 후 단조 성형하여 모양을 갖추고, 열처리를 통해 물성을 향상시킨다.The nozzle boss 14 is shaped by forging after cutting an aluminum billet to have a tube portion through which hydrogen flows in and out, and improves physical properties through heat treatment.

또한, 노즐 보스(14)는 라이너의 길이 방향 단부 즉, 제1 돔부(12)나 제2 돔부(13) 중 어느 하나 이상에 구비되는 것으로, 금속 재질의 노즐 보스(14)는 합성수지 재질의 제1 돔부(12)나 제2 돔부(13)에 결합이 필요하다.In addition, the nozzle boss 14 is provided at the longitudinal end of the liner, that is, at least one of the first dome portion 12 and the second dome portion 13, and the nozzle boss 14 made of a metal material is made of a synthetic resin material. It is necessary to couple to the first dome portion 12 or the second dome portion 13 .

결합을 위해 돔부(제1 돔부 및/또는 제2 돔부)에 대응하는 성형 몰드의 인서트 캐비티 내에 노즐 보스(14)를 삽입 후 용융 합성수지를 주입함으로써 돔부에 노즐 보스(14)가 결합되는 인서트 사출 공법이 적용된다.Insert injection method in which the nozzle boss 14 is coupled to the dome part by inserting the nozzle boss 14 into the insert cavity of the molding mold corresponding to the dome part (the first dome part and/or the second dome part) for bonding and then injecting molten synthetic resin into the dome part This applies.

따라서, 노즐 보스(14)를 결합하기 위한 보스 성형단계(S14)는 인서트 사출 공법 적용단계로서, 결합 대상 돔부에 따라 제1 돔부(12)를 성형하는 제2 부분 성형단계(S12)나 제2 돔부(12)를 성형하는 제3 부분 성형단계(S13)와 동시에 진행될 수 있다.Therefore, the boss molding step (S14) for coupling the nozzle boss 14 is an insert injection method application step, and a second partial molding step (S12) or a second part molding step (S12) of molding the first dome part 12 according to the coupling target dome part It may proceed simultaneously with the third partial forming step (S13) of forming the dome portion (12).

위와 같이 각 부가 준비되며 이들을 서로 연결하는 융착 단계를 진행한다. 융착단계에서는 실린더부(11)와 노즐 보스(14)가 결합된 제1 돔부(12) 및 제2 돔부(13)가 준비된 이후에는 이들을 서로 융착시켜 일체화시킨다.Each part is prepared as above, and the fusion step of connecting them is performed. In the fusion step, after the first dome part 12 and the second dome part 13 to which the cylinder part 11 and the nozzle boss 14 are coupled are prepared, they are fused to each other and integrated.

이에, 제1 융착단계(S14)에서는 제1 돔부(12)를 실린더부(11)의 일측 단부에 융착시킨다. 융착시 제1 돔부(12)의 내측 방향이 실린더부(11)의 일측 단부에 형상 맞춤으로 배치된 상태에서 열융착이 이루어진다.Accordingly, in the first fusion step ( S14 ), the first dome part 12 is fused to one end of the cylinder part 11 . During welding, thermal welding is performed in a state in which the inner direction of the first dome portion 12 is disposed to one end of the cylinder portion 11 in a shape-fitting state.

또한, 제2 융착단계(S15)에서는 제2 돔부(13)를 실린더부(11)의 타측 단부에 융착시킨다. 융착시 제2 돔부(13)의 내측 방향이 실린더부(11)의 타측 단부에 형상 맞춤으로 배치된 상태에서 열융착이 이루어진다.In addition, in the second welding step ( S15 ), the second dome portion 13 is fused to the other end of the cylinder portion 11 . When fusion is performed, thermal fusion is performed in a state in which the inner direction of the second dome part 13 is disposed to the other end of the cylinder part 11 in a shape-fitting state.

제1 돔부(12)와 제2 돔부(13)는 실시예로 동일한 융착기에 의해 각각 융착ㄷ되며, 융착기 타입에 따라 실린더부(11)의 각 단에 제1 돔부(12)와 제2 돔부(13)가 순차로 융착하거나 혹은 실린더부(11)의 양단부에 동시에 융착될 수 있다.The first dome portion 12 and the second dome portion 13 are respectively fused by the same welding machine as an embodiment, and the first dome portion 12 and the second dome portion ( 13) may be sequentially fused or fused to both ends of the cylinder part 11 at the same time.

따라서, 노즐 보스(14)가 결합되어 있는 제1 돔부(12) 및 제2 돔부(13)가 실린더부(11)의 양측 말단에 융착되어 일체의 라이너(10)를 구성하게 된다. 공지된 바와 같이 성형을 마친 라이너(10)는 후속 공정에서 열경화성수지나 열가소성수지를 함침시킨 탄소섬유 등을 감아 강도를 보강한다.Accordingly, the first dome portion 12 and the second dome portion 13 to which the nozzle boss 14 is coupled are fused to both ends of the cylinder portion 11 to constitute the integral liner 10 . As is known, the molded liner 10 is reinforced by winding carbon fibers impregnated with a thermosetting resin or a thermoplastic resin in a subsequent process.

한편, 제1 부분 성형단계(S11)는 다이스에 용융 원재를 압출시켜 실린더부(11)를 성형하되, 다중층 압출 성형기에 의해 실린더부(11)의 외주면을 덮은 아웃터 쉘(11-O)을 포함하여 다중층 구조로 압출 성형하는 단계인 것이 바람직하다.On the other hand, in the first partial molding step (S11), the molten raw material is extruded into a die to mold the cylinder part 11, but the outer shell 11-O covering the outer peripheral surface of the cylinder part 11 by a multi-layer extrusion molding machine is formed. It is preferable to include a step of extrusion molding into a multi-layer structure.

또한, 상기 압출 성형된 다중층 구조의 외표면에 냉각수를 분사하는 냉각단계를 포함한다. In addition, it includes a cooling step of spraying cooling water to the outer surface of the extrusion-molded multi-layer structure.

냉각단계 이후에는 아웃터 쉘(11-O)을 수소저장탱크에 포함시켜 사용하는지의 유무에 따라 아웃터 쉘(11-O)을 제거하는 쉘 제거단계를 선택적으로 진행할 수 있다. 예컨대, 제1 돔부(12)와 제2 돔부(13)를 실린더부(11)에 융착하기 전에 아웃터 쉘(11-O)을 제거하는 쉘 제거단계를 더 포함할 수 있다.After the cooling step, a shell removal step of removing the outer shell 11-O may be selectively performed depending on whether the outer shell 11-O is included in the hydrogen storage tank and used. For example, the method may further include a shell removing step of removing the outer shell 11 -O before the first dome portion 12 and the second dome portion 13 are fused to the cylinder portion 11 .

상기 아웃터 쉘(11-O)은 관 형상의 실린더부(11)에 기능성을 부여하는 층으로, 실시예로 멀티레이어 압출 성형기(20)에 각각의 용융 원재를 투입하여 실린더부(11)에 아웃터 쉘(11-O)이 적층된 다층 구조를 형성된다.The outer shell 11-O is a layer that imparts functionality to the tubular cylinder part 11, and in an embodiment, each molten raw material is put into the multi-layer extrusion molding machine 20 to provide the outer shell to the cylinder part 11. A multilayer structure in which the shells 11-O are stacked is formed.

이때, 아웃터 쉘(11-O)은 기능성의 일 예로 압출 성형된 실린더부(11)에 냉각수가 유입되지 않도록 방수 기능을 제공한다. 따라서, 용융 원재를 압출 성형 후 냉각을 위해 냉각수를 분사시 아웃터 쉘(11-O)이 방수층 역할을 한다.In this case, the outer shell 11-O provides a waterproof function so that coolant does not flow into the extruded cylinder part 11 as an example of functionality. Therefore, the outer shell 11-O serves as a waterproof layer when cooling water is sprayed for cooling after extrusion molding of the molten raw material.

특히, 실린더부(11)를 폴리아미드(PA)로 성형하는 경우, 폴리아미드(PA)는 수소 투과도가 낮아 수소 저장에 용이한 반면, 흡습 특성이 뛰어나다. 따라서, 폴리아미드 실린더부(11)를 압출 후 냉각수로 냉각하면 냉각수를 흡수하게 된다.In particular, when the cylinder part 11 is molded of polyamide (PA), the polyamide (PA) has a low hydrogen permeability and is easy to store hydrogen, but has excellent moisture absorption properties. Therefore, when the polyamide cylinder part 11 is cooled with cooling water after extrusion, the cooling water is absorbed.

냉각수를 흡수한 폴리아미드 실린더부(11)는 그 양단부에 결합되는 제1 돔부(12) 및 제2 돔부(13)와의 열융착이 이루어지 않기 때문에 제작이 어렵거나 불량이 발생한다.Since the polyamide cylinder part 11 that has absorbed the cooling water is not heat-sealed with the first dome part 12 and the second dome part 13 coupled to both ends thereof, manufacturing is difficult or defective.

그러므로, 냉각수를 분사하는 실린더부(11)의 외주면에 방수 기능의 아웃터 쉘(11-O)을 더 포함하여, 그 내측에 배치된 실린더부(11)에서 냉각수를 흡수(흡습)하는 것을 방지할 수 있도록 한다.Therefore, by further including an outer shell 11-O having a waterproof function on the outer circumferential surface of the cylinder unit 11 for spraying the cooling water, the cylinder unit 11 disposed inside the cylinder unit 11 can prevent absorption (moisture absorption) of the cooling water. make it possible

방수 기능을 갖는 기능성 아웃터 쉘(11-O) 역시 합성수지 재질이 적용될 수 있으며, 방수 기능을 제공하는 합성수지에는 폴리에틸렌(PE)도 포함된다. A synthetic resin material may also be applied to the functional outer shell 11-O having a waterproof function, and the synthetic resin providing a waterproof function includes polyethylene (PE).

다만, 후속 공정으로 라이너(10)에 탄소 섬유를 감는데 이용되는 열경화성수지나 열가소성수지는 폴리에틸렌(PE)과의 계면에서 부착되지 않기 때문에 실린더부(11)의 양단에 돔부(12, 13)를 열융착하기 전에 아웃터 쉘(11-O)은 제거되어야 한다.However, since the thermosetting resin or thermoplastic resin used to wind the carbon fiber on the liner 10 as a subsequent process does not adhere at the interface with the polyethylene (PE), dome parts 12 and 13 are formed at both ends of the cylinder part 11. Before heat sealing, the outer shell 11-O must be removed.

또한, 상기 제1 부분 성형단계(S11)는 상기 실린더부(11)의 내주면을 덮는 이너 쉘(11-I)을 포함하여 다중층 구조를 형성할 수 있다. In addition, the first partial forming step ( S11 ) may include an inner shell 11 -I covering the inner circumferential surface of the cylinder part 11 to form a multi-layered structure.

이너 쉘(11-I) 역시 관 형상의 실린더부(11)에 기능성을 부여하는 층으로 실린더부(11)의 내주면에 밀착 적층되어 내주면을 덮는다.The inner shell 11-I is also a layer that imparts functionality to the tubular cylinder part 11 and is closely stacked on the inner peripheral surface of the cylinder part 11 to cover the inner peripheral surface.

실린더부(11)에 이너 쉘(11-I)이 적층된 다층 구조를 위해, 실시예로서 실린더부(11)의 내주면에 접착제를 도포 후 별도로 제작된 이너 쉘(11-I)을 부착할 수 있다. 다만, 이너 쉘(11-I) 역시 재질이나 공법에 따라 실린더부(11)와 함께 압출 성형될 수 있다.For a multi-layer structure in which the inner shell 11-I is laminated on the cylinder part 11, as an embodiment, after applying an adhesive to the inner peripheral surface of the cylinder part 11, a separately manufactured inner shell 11-I may be attached. have. However, the inner shell 11-I may also be extrusion-molded together with the cylinder part 11 according to a material or a method.

이때, 이너 쉘(11-I)은 가스 배리어 수지층(11a)을 포함할 수 있다. 가스 배리어 수지층(11a)은 수소의 투과를 차단하는 것으로, 바람직하게는 에틸렌비닐알코올(EVOH)이나 이를 포함하는 합성수지가 적용될 수 있다.In this case, the inner shell 11-I may include the gas barrier resin layer 11a. The gas barrier resin layer 11a blocks the permeation of hydrogen, and preferably, ethylene vinyl alcohol (EVOH) or a synthetic resin including the same may be applied.

또한, 이너 쉘(11-I) 자체도 다층 구조로 구성될 수 있으며, 이 경우 이너 쉘(11-I)은 가스 배리어 수지층(11a)의 노출 표면에 적층되는 폴리아미드층(11b)을 포함하는 것이 바람직하다.In addition, the inner shell 11-I itself may also have a multi-layer structure. In this case, the inner shell 11-I includes a polyamide layer 11b laminated on the exposed surface of the gas barrier resin layer 11a. It is preferable to do

예컨대, 라이너는 외부 극한 환경이나 수소의 온도 변화에 대응하여 -45℃~85℃의 범위의 온도에서도 견딜 수 있어야 하므로, 습도와 온도에 민감한 에틸렌비닐알코올 층(11a)의 표면에 폴리아미드층(11b)을 추가로 적층할 수 있다.For example, since the liner must be able to withstand a temperature in the range of -45 ° C to 85 ° C in response to an external extreme environment or temperature change of hydrogen, a polyamide layer ( 11b) may be further laminated.

이상과 같이 본 발명은 연료전지용 수소저장탱크를 다수로 연결하여 사용할 수 있는 소직경 장축 수소저장탱크의 라이너(10)를 제공한다. As described above, the present invention provides a liner 10 of a small-diameter long-axis hydrogen storage tank that can be used by connecting a plurality of hydrogen storage tanks for fuel cells.

또한 소직경 장축 수소저장탱크의 라이너(10)를 그 형상별로 직선관 형상의 실린더부(11)와 돔 형상의 제1 돔부(12) 및 제2 돔부(13)로 분리하여 각각 최적의 공법으로 제작한 후 이들을 서로 융착하여 라이너(10)를 공급한다.In addition, the liner 10 of the small-diameter long-axis hydrogen storage tank is separated into a straight tube-shaped cylinder part 11 and a dome-shaped first dome part 12 and a second dome part 13 for each shape, each using an optimal method. After manufacturing, they are fused to each other to supply the liner 10 .

또한, 직선관 형상의 실린더부(11)는 돔 구조를 포함하지 않고 형상이 단순하여 별도 제작에 유리하므로, 아웃터 쉘(11-O)이나 이너 쉘(11-I)과 같은 기능성 층을 선택하여 적층하거나 이들 모두를 적층하여 성능을 향상시킬 수 있다.In addition, since the straight tube-shaped cylinder part 11 does not include a dome structure and has a simple shape, which is advantageous for separate production, by selecting a functional layer such as the outer shell 11-O or the inner shell 11-I, The performance can be improved by stacking them or by stacking them both.

이상, 본 발명의 특정 실시예에 대하여 상술하였다. 그러나, 본 발명의 사상 및 범위는 이러한 특정 실시예에 한정되는 것이 아니라, 본 발명의 요지를 변경하지 않는 범위 내에서 다양하게 수정 및 변형 가능하다는 것을 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 이해할 것이다.In the above, specific embodiments of the present invention have been described above. However, the spirit and scope of the present invention is not limited to these specific embodiments, and various modifications and variations are possible within the scope that does not change the gist of the present invention. You will understand when you grow up.

따라서, 이상에서 기술한 실시예들은 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이므로, 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 하며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다.Therefore, since the embodiments described above are provided to fully inform those of ordinary skill in the art to which the present invention pertains to the scope of the invention, it should be understood that they are exemplary in all respects and not limiting, The invention is only defined by the scope of the claims.

HT: 수소저장탱크
MF: 매니폴드
10: 라이너
11: 실린더부
12: 제1 돔부
13: 제2 돔부
11-O: 아웃터 쉘(outer shell)
11-I: 이너 쉘(inner shell)
11a: 가스 배리어 수지층
11b: 폴리아미드층
20: 멀티레이어 압출기
21: 다이스(dies)HT: hydrogen storage tank
MF: Manifold
10: liner
11: cylinder part
12: first dome part
13: second dome part
11-O: outer shell
11-I: inner shell
11a: gas barrier resin layer
11b: polyamide layer
20: multi-layer extruder
21: dies

Claims (13)

연료 전지용 수소를 저장하는 소직경 장축 수소저장탱크의 라이너에 있어서,
양단이 개방된 직선관 형상의 실린더부(11)와;
상기 실린더부(11)의 일측 단부에 융착되며, 돔(dome) 형상으로 이루어진 제1 돔부(12)와;
상기 실린더부(11)의 타측 단부에 융착되며, 돔(dome) 형상으로 이루어진 제2 돔부(13); 및
상기 제1 돔부(12) 및 제2 돔부(13) 중 어느 하나 이상에 결합되며, 수소가 유출입되는 노즐 보스(14);를 포함하되,
상기 실린더부(11), 제1 돔부(12) 및 제2 돔부(13)는 수소가스 투과성이 낮아 수소가스를 저장할 수 있는 폴리아미드(Polyamide) 재질로 이루어져 있고,
상기 실린더부(11)는 다이스(dies)에 용융 원재를 압출시켜 성형하되,
상기 실린더부(11)의 외주면을 덮는 아웃터 쉘(outer shell, 11-O)을 더 포함하여, 상기 실린더부(11)와 아웃터 쉘(11-O)을 포함하는 다중층 구조를 형성하고,
상기 아웃터 쉘(11-O)은 상기 압출시켜 성형된 실린더부(11)에 냉각수가 유입되지 않도록 방수 기능을 갖는 에폭시 수지로 구성된 것을 특징으로 하는 소직경 장축 수소저장탱크의 라이너.In the liner of a small-diameter long-axis hydrogen storage tank for storing hydrogen for fuel cells,
a cylinder part 11 of a straight tube shape with both ends open;
a first dome portion 12 that is fused to one end of the cylinder portion 11 and has a dome shape;
a second dome portion 13 fused to the other end of the cylinder portion 11 and having a dome shape; and
A nozzle boss 14 coupled to at least one of the first dome portion 12 and the second dome portion 13, and through which hydrogen flows in and out;
The cylinder part 11, the first dome part 12 and the second dome part 13 are made of a polyamide material capable of storing hydrogen gas due to low hydrogen gas permeability,
The cylinder part 11 is molded by extruding a molten raw material to dies,
Further comprising an outer shell (11-O) covering the outer peripheral surface of the cylinder part (11) to form a multi-layer structure including the cylinder part (11) and the outer shell (11-O),
The outer shell (11-O) is a liner of a small-diameter long-axis hydrogen storage tank, characterized in that it is composed of an epoxy resin having a waterproof function so that coolant does not flow into the extruded and molded cylinder part (11). 삭제delete 제1항에 있어서,
상기 노즐 보스(14)는 금속 재질로 이루어지며 각각 상기 제1 돔부(12) 및 제2 돔부(13) 중 어느 하나 이상에 인서트 사출 성형된 것을 특징으로 하는 소직경 장축 수소저장탱크의 라이너.According to claim 1,
The nozzle boss (14) is made of a metal material and is insert injection-molded into at least one of the first dome portion (12) and the second dome portion (13), respectively. 삭제delete 삭제delete 삭제delete 제1항에 있어서,
상기 실린더부(11)의 내주면을 덮는 이너 쉘(inner shell, 11-I)을 더 포함하며,
상기 실린더부(11)와 이너 쉘(11-I)을 포함하여 다중층 구조를 형성하는 것을 특징으로 하는 소직경 장축 수소저장탱크의 라이너.According to claim 1,
It further comprises an inner shell (inner shell, 11-I) covering the inner circumferential surface of the cylinder part 11,
The liner of a small-diameter long-axis hydrogen storage tank, characterized in that it forms a multi-layer structure including the cylinder part (11) and the inner shell (11-I). 제7항에 있어서,
상기 이너 쉘(11-I)은,
가스 배리어 수지층(11a)을 포함하는 것을 특징으로 하는 소직경 장축 수소저장탱크의 라이너.8. The method of claim 7,
The inner shell 11-I,
A liner of a small-diameter long-axis hydrogen storage tank comprising a gas barrier resin layer (11a). 제8항에 있어서,
상기 이너 쉘(11-I)은,
상기 가스 배리어 수지층(11a)의 노출 표면에 적층되는 폴리아미드층(11b)을 포함하는 것을 특징으로 하는 소직경 장축 수소저장탱크의 라이너.9. The method of claim 8,
The inner shell 11-I,
and a polyamide layer (11b) laminated on the exposed surface of the gas barrier resin layer (11a). 삭제delete 삭제delete 삭제delete 삭제delete
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DE112021005956.4T DE112021005956T5 (en) 2020-11-10 2021-11-05 INNER CONTAINER FOR A SMALL DIAMETER LONG AXIS HYDROGEN STORAGE TANK AND METHOD FOR PRODUCING THE SAME
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