# US 2022/0034450 A1 · High-pressure tank and method for manufacturing high-pressure tank

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- Number: US 2022/0034450 A1
- Document ID: US20220034450A1
- Status: Published application
- Kind: A1
- Application number: 17/336,726
- Filed: 2021-06-02
- Published: 2022-02-03
- Earliest claimed: 2020-07-31
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Koji KATANO
- Web page: https://patentgrep.com/patent/US20220034450A1

## CPC

- F17C 1/06: built-up from wound-on bands or filamentary material, e.g. wires
- B29C 53/585: {the cross-section varying along their axis, e.g. tapered, with ribs, or threads, with socket-ends}
- B29C 53/602: {for tubular articles having closed or nearly closed ends, e.g. vessels, tanks, containers}
- B29C 53/66: with axially movable winding feed member {, e.g. lathe type winding}
- B29C 70/207: {arranged in parallel planes of fibres crossing at substantial angles}
- B29C 70/32: on a rotating mould, former or core
- B29L 2031/7156: {Pressure vessels}
- F17C 2201/0109: with exteriorly curved end-piece
- F17C 2201/056: Small (<1 m3)
- F17C 2203/013: in the vessel, e.g. columns
- F17C 2203/0604: Liners
- F17C 2203/0619: with two layers
- F17C 2203/0624: with four or more layers
- F17C 2203/0663: in form of fibers or filaments
- F17C 2203/0673: Polymers
- F17C 2205/0305: Bosses, e.g. boss collars
- F17C 2205/0397: on both sides of the pressure vessel
- F17C 2209/2154: Winding
- F17C 2209/2163: with a mandrel
- F17C 2221/012: Hydrogen
- F17C 2223/0123: gaseous, e.g. CNG, GNC
- F17C 2223/036: Very high pressure (>80 bar)
- F17C 2270/0168: by vehicles
- F17C 2270/0184: Fuel cells
- Y02E 60/32: Hydrogen storage
- 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 (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25)
- 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 (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A high-pressure tank includes a cylindrical portion including a fiber-reinforced resin and a dome portion including a fiber-reinforced resin. The cylindrical portion includes an axial fiber layer including a fiber oriented in a center axis direction of the high-pressure tank, and a circumferential fiber layer including a fiber oriented in a circumferential direction of the high-pressure tank. An end portion of the axial fiber layer and an end portion of the dome portion are joined to each other.

## Claims

### Claim 1

A high-pressure tank comprising:
a cylindrical portion including a fiber-reinforced resin; and
a dome portion including a fiber-reinforced resin, wherein
the cylindrical portion includes
an axial fiber layer including a fiber oriented in a center axis direction of the high-pressure tank, and
a circumferential fiber layer including a fiber oriented in a circumferential direction of the high-pressure tank, and
an end portion of the axial fiber layer and an end portion of the dome portion are joined to each other.

### Claim 2 (depends on 1)

The high-pressure tank according to claim 1, wherein the axial fiber layer is disposed on an inner side of the circumferential fiber layer.

### Claim 3 (depends on 2)

The high-pressure tank according to claim 2, wherein the end portion of the dome portion is disposed between the axial fiber layer and the circumferential fiber layer.

### Claim 4

A method for manufacturing a high-pressure tank including a cylindrical portion including a fiber-reinforced resin and a dome portion including a fiber-reinforced resin, the method comprising:
(a) a step of preparing an axial fiber layer included in the cylindrical portion, the axial fiber layer including a fiber oriented in an axial direction of the high-pressure tank, and the dome portion;
(b) a step of forming a joined body by joining an end portion of the axial fiber layer and an end portion of the dome portion to each other; and
(c) a step of forming a circumferential fiber layer including a fiber oriented in a circumferential direction of the high-pressure tank, on an outer side or an inner side of the axial fiber layer.

### Claim 5 (depends on 4)

The method for manufacturing a high-pressure tank according to claim 4, wherein the (c) step includes a step of forming at least a part of the circumferential fiber layer on the outer side of the axial fiber layer.

### Claim 6 (depends on 5)

The method for manufacturing a high-pressure tank according to claim 5, wherein:
the (b) step is a step of forming a joined body by joining an inner surface of the end portion of the dome portion and an outer surface of the end portion of the axial fiber layer; and
the (c) step further includes a step of forming another part of the circumferential fiber layer on an outer side of the end portion of the dome portion.