High pressure tank

Patent metadata

Field	Value
Publication number	US-10697590-B2
Application number	US-201815920581-A
Country	US
Kind code	B2
Filing date	Mar 14, 2018
Priority date	Mar 17, 2017
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A high pressure tank includes: a resin liner for containing a fluid; a reinforced layer covering an outer surface of the liner; and a cap including a supply/discharge hole for supplying and discharging the fluid to and from the liner. Gas vent passages formed in the cap each including at one end a first opening open toward the cap-facing surface of the liner and at the other end a second opening open toward at least one of an inside of the supply/discharge hole and an outside of the reinforced layer. A cross-sectional area of the gas vent passage at the one end perpendicular to a longitudinal direction and the first opening are smaller than other cross-sectional areas of the gas vent passage perpendicular to the longitudinal direction.

First claim

What is claimed is:

1. A high pressure tank comprising:
a resin liner configured to contain a fluid;
a reinforced layer covering an outer surface of the liner; and
a cap including a supply/discharge hole configured to supply and discharge the fluid to and from the liner, wherein:
the outer surface of the liner includes a reinforced-layer-facing surface facing toward the reinforced layer and a cap-facing surface facing toward the cap;
a gas vent passage is formed in the cap, the gas vent passage having at one end a first opening facing toward the cap-facing surface and at another end a second opening facing toward at least one of an inside of the supply/discharge hole and an outside of the reinforced layer;
a cross-sectional area of the gas vent passage at one end perpendicular to its longitudinal direction and an opening area of the first opening are smaller than a cross-sectional area of the gas vent passage at another portion perpendicular to the longitudinal direction; and
a plug inserted in an insertion hole formed in the cap to open toward the cap-facing surface, wherein:
a plug passage penetrating the plug at least partially forms the one end of the gas vent passage, and a cap passage formed in the cap forms the other end of the gas vent passage; and
the first opening is formed in an end surface at one end of the plug facing toward the cap-facing surface.

2. The high pressure tank according to claim 1 , wherein the area of the first opening is set such that a maximum shear stress generated at a portion of the liner facing toward the first opening is equal to or less than ½ of a yield stress S of a resin material constituting the liner.

3. The high pressure tank according to claim 2 , wherein the first opening has a circular shape with a diameter D, and the diameter D meets a following inequality: D<S×T×2/P,
where T represents a thickness T of the portion of the liner facing toward the first opening, P represents a maximum filling pressure P of the fluid, and S represents the yield stress S of the resin material.

4. The high pressure tank according to claim 1 , wherein the plug and the cap are formed of a same material.

5. A high pressure tank comprising:
a resin liner configured to contain a fluid;
a reinforced layer covering an outer surface of the liner; and
a cap including a supply/discharge hole configured to supply and discharge the fluid to and from the liner, wherein:
the outer surface of the liner includes a reinforced-layer-facing surface facing toward the reinforced layer and a cap-facing surface facing toward the cap;
a gas vent passage is formed in the cap, the gas vent passage having at one end a first opening facing toward the cap-facing surface and at another end a second opening facing toward at least one of an inside of the supply/discharge hole and an outside of the reinforced layer;
a plug inserted in an insertion hole formed in the cap to open toward the cap-facing surface; and
a cross-sectional area of the gas vent passage at one end perpendicular to its longitudinal direction and an opening area of the first opening are smaller than a cross-sectional area of the gas vent passage at another portion perpendicular to the longitudinal direction, wherein:
a groove passage formed on a surface of the plug at least partially forms the one end of the gas vent passage, and a cap passage formed in the cap forms the other end of the gas vent passage; and
the first opening is formed in an end surface at the one end of the plug facing toward the cap-facing surface.

6. The high pressure tank according to claim 5 , wherein the area of the first opening is set such that a maximum shear stress generated at a portion of the liner facing toward the first opening is equal to or less than ½ of a yield stress S of a resin material constituting the liner.

7. The high pressure tank according to claim 6 , wherein the first opening has a circular shape with a diameter D, and the diameter D meets a following inequality: D<S×T×2/P,
where T represents a thickness T of the portion of the liner facing toward the first opening, P represents a maximum filling pressure P of the fluid, and S represents the yield stress S of the resin material.

8. The high pressure tank according to claim 5 , wherein the plug and the cap are formed of a same material.

Assignees

• Honda Motor Co Ltd

Inventors

• Kanezaki Toshihiko

Classifications

• F17C1/16 Primary

  constructed of plastics materials {(shaping of plastics B29C)} · CPC title

• Y02E60/32

  Hydrogen storage · CPC title

• F17C2209/234

  of closing end pieces, e.g. caps · CPC title

• F17C2203/0663

  in form of fibers or filaments · CPC title

• F17C2205/0305

  Bosses, e.g. boss collars · CPC title