Manufacturing method for high pressure tank

Patent metadata

Field	Value
Publication number	US-11285658-B2
Application number	US-201916585087-A
Country	US
Kind code	B2
Filing date	Sep 27, 2019
Priority date	Nov 2, 2018
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A manufacturing method for a high pressure tank, includes preparing a liner, and forming a helical layer by helical-winding fiber bundles around the liner, wherein a plurality of layers included in the helical layer include: base turnback layers formed by winding the fiber bundles while a base section of each of caps projecting outward of the liner is used as a winding turnback position where the fiber bundles are turned back in the axial direction; and distant turnback layers formed by winding the fiber bundles while a distant position distant from each base section is used as the winding turnback position, and in the distant turnback layers, the helical-winding is performed such that gaps are generated between adjacent fiber bundles of the fiber bundles.

First claim

What is claimed is:

1. A manufacturing method for a high pressure tank, comprising:
preparing a liner that forms a space configured to seal a gas in the space, the liner including a cylinder portion in a cylindrical shape and a pair of dome portions provided at both ends of the cylinder portion in an axial direction of the cylinder portion, caps being provided to the respective dome portions; and
forming a helical layer by helical-winding fiber bundles on the liner,
wherein
a plurality of layers included in the helical layer include: base turnback layers formed by winding the fiber bundles while a base section of each of the caps projecting outward of the liner in the axial direction is used as a winding turnback position where the fiber bundles are turned back in the axial direction; and distant turnback layers formed by winding the fiber bundles while a distant position distant from each base section is used as the winding turnback position, and
in the distant turnback layers, the helical-winding is performed such that gaps are generated between adjacent fiber bundles of the fiber bundles;
wherein at least one distant turnback layer is formed between two base turnback layers, and at least one base turnback layer is formed between two distant turnback layers.

2. The manufacturing method for a high pressure tank according to claim 1 , wherein a coverage with the fiber bundles of the distant turnback layers is in a range of not less than 50% to not more than 80%.

Assignees

• Toyota Motor Co Ltd

Inventors

• Otsubo Hirokazu

Classifications

• Y02E60/32

  Hydrogen storage · CPC title

• F17C2201/035

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• F17C2203/066

  Plastics · CPC title

• B29K2307/04

  Carbon · CPC title

• F17C2209/232

  of walls · CPC title