# US 11,441,732 B2 · Manufacturing method for high-pressure tank and high-pressure tank

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- Number: US 11,441,732 B2
- Document ID: US11441732B2
- Status: Granted
- Kind: B2
- Application number: 17/068,330
- Filed: 2020-10-12
- Published: 2021-07-22
- Granted: 2022-09-13
- Earliest claimed: 2020-01-17
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Koji Katano
- Web page: https://patentgrep.com/patent/US11441732B2

## CPC

- F17C 1/06: built-up from wound-on bands or filamentary material, e.g. wires
- F17C 1/16: constructed of plastics materials {(shaping of plastics B29C)}
- F17C 2201/0109: with exteriorly curved end-piece
- F17C 2201/056: Small (<1 m3)
- F17C 2201/058: portable (<30 l)
- F17C 2203/012: on or in the wall, e.g. ribs
- F17C 2203/0604: Liners
- F17C 2203/0619: with two layers
- F17C 2203/0621: with three layers
- F17C 2203/066: Plastics
- F17C 2203/0663: in form of fibers or filaments
- F17C 2205/0305: Bosses, e.g. boss collars
- F17C 2209/2154: Winding
- F17C 2221/012: Hydrogen
- F17C 2221/033: Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
- F17C 2221/035: Propane butane, e.g. LPG, GPL
- F17C 2223/0123: gaseous, e.g. CNG, GNC
- F17C 2223/0153: Liquefied gas, e.g. LPG, GPL
- F17C 2223/0161: cryogenic, e.g. LNG, GNL, PLNG
- F17C 2223/033: Small pressure, e.g. for liquefied gas
- F17C 2223/036: Very high pressure (>80 bar)
- 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)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A high-pressure tank includes a liner, a first reinforcing layer covering an outer surface of the liner, and a second reinforcing layer covering an outer surface of the first reinforcing layer. The first reinforcing layer is formed as a cylindrical member, a valve-side dome member, and an end-side dome member are fitted to each other in a state where resin intervening members are arranged between these members neighboring each other, respectively. The resin intervening member is formed into a ring shape.

## Claims

### Claim 1

A high-pressure tank including a liner that stores gas, a first reinforcing layer that covers an outer surface of the liner and is formed as a plurality of split bodies fitted to each other, and a second reinforcing layer that covers an outer surface of the first reinforcing layer, wherein
the split bodies are fitted to each other in a state where a resin intervening member is arranged between the neighboring split bodies;
the plurality of split bodies are a cylindrical member, a valve-side dome member and an end-side dome member;
a valve-side fitting end portion of the cylindrical member and an end-side fitting end portion of the cylindrical member are formed into a tapered shape such that thicknesses of the valve-side fitting end portion of the cylindrical member and the end-side fitting end portion of the cylindrical member are reduced gradually from an outer side towards an inner side of the high-pressure tank;
a fitting end portion of the valve-side dome member fitted to the valve-side fitting end portion of the cylindrical member and a fitting end portion of the end-side dome member fitted to the end-side fitting end portion are formed into a tapered shape such that thicknesses of the fitting end portion of the valve-side dome member and the fitting end portion of the end-side dome member are gradually reduced from the inner side towards the outer side of the high-pressure tank;
the valve-side dome member and the cylindrical member are fitted to each other in a state where the fitting end portion of the valve-side dome member is positioned on the outer side and the valve-side fitting end portion of the cylindrical member is positioned on the inner side;
the resin intervening member has a Z-shaped section, and includes a first part, a second part and a third part;
the first part is sandwiched between the fitting end portion of the valve-side dome member and the valve-side fitting end portion of the cylindrical member;
the second part covers the fitting end portion of the valve-side dome member together with the first part; and
the third part covers the valve-side fitting end portion of the cylindrical member together with the first part.

### Claim 2 (depends on 1)

The high-pressure tank according to claim 1, wherein the resin intervening member is formed into a ring shape.

### Claim 3 (depends on 1)

The high-pressure tank according to claim 1, wherein the resin intervening member is formed with use of a resin material that does not contain fiber.