# US 11,027,480 B2 · Method for manufacturing high-pressure tank

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- Number: US 11,027,480 B2
- Document ID: US11027480B2
- Status: Granted
- Kind: B2
- Application number: 16/745,713
- Filed: 2020-01-17
- Published: 2020-07-23
- Granted: 2021-06-08
- Earliest claimed: 2019-01-21
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Yuichiro Hama; Takashi Usui; Tomoyoshi Kobayashi
- Web page: https://patentgrep.com/patent/US11027480B2

## CPC

- B29C 53/56: Winding and joining, e.g. winding spirally {(winding in general B65H)}
- B29C 53/605: {by polar winding}
- B29C 53/845: {especially adapted for winding and joining}
- B29K 2101/10: Thermosetting resins
- B29K 2105/08: of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K 2307/04: Carbon
- B29L 2031/7172: {Fuel tanks, jerry cans}
- Y02E 60/32: Hydrogen storage
- 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)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- 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 method for manufacturing a high pressure tank capable of uniformly heating a thermosetting resin in a short time is provided. A method for manufacturing a high-pressure tank including: a step (a) of preparing a tank intermediate product including a fiber-reinforced resin layer formed by winding a carbon fiber impregnated with a thermosetting resin around a liner including a cap attached thereto; and a step (b) of performing a process for thermosetting the fiber-reinforced resin layer of the tank intermediate product by induction-heating the fiber-reinforced resin layer using induction-heating means, in which: the induction-heating means includes first induction-heating means for induction-heating a trunk part of the tank intermediate product and second induction-heating means for induction-heating a dome part of the tank intermediate product; and a temperature of the trunk part of the tank intermediate product and a temperature of the dome part thereof are controlled independently.

## Claims

### Claim 1

A method for manufacturing a high-pressure tank comprising:
a step (a) of preparing a tank intermediate product including a fiber-reinforced resin layer formed by winding a carbon fiber impregnated with a thermosetting resin around a liner including a cap attached thereto; and
a step (b) of performing a process for induction-heating the fiber-reinforced resin layer of the tank intermediate product by induction-heating the fiber-reinforced resin layer using induction-heating means, wherein:
the induction-heating means comprises first induction-heating means for induction-heating a trunk part of the tank intermediate product and second induction-heating means for induction-heating a dome part of the tank intermediate product; and
a temperature of the trunk part of the tank intermediate product and a temperature of the dome part thereof are controlled independently of each other by controlling an output of the first induction-heating means and an output of the second induction-heating means independently of each other in the step (b).

### Claim 2 (depends on 1)

The method for manufacturing the high-pressure tank according to claim 1, wherein the first induction-heating means is an induction-heating coil disposed so as to surround the tank intermediate product along a longitudinal direction of the tank intermediate product.

### Claim 3 (depends on 1)

The method for manufacturing the high-pressure tank according to claim 1, wherein in the step (b), the temperature of the trunk part and the temperature of the dome part are measured, and based on the measured temperatures, the output of the first induction-heating means and the output of the second induction-heating means are controlled.

### Claim 4 (depends on 1)

The method for manufacturing the high-pressure tank according to claim 1, wherein in the step (b), the output of the first induction-heating means is gradually decreased over time.