Device for protecting a high-pressure gas tank in a motor vehicle, high-pressure gas tank for a motor vehicle, and method for the production of a high-pressure gas tank

Patent metadata

Field	Value
Publication number	US-10267459-B2
Application number	US-201615371739-A
Country	US
Kind code	B2
Filing date	Dec 7, 2016
Priority date	Jul 11, 2014
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A device is provided for protecting a high-pressure gas tank in a motor vehicle The device has an intumescent layer which is arranged and designed such that the intumescent layer at least partially shields the high-pressure gas tank. The intumescent layer includes an intumescent metal material.

First claim

What is claimed is:

1. A device for protecting a high-pressure gas tank of a motor vehicle, comprising:
an intumescent layer disposed and configured so as to at least partially shield the high-pressure gas tank, wherein
the intumescent layer comprises an intumescent metal material and the intumescent metal material is an intumescent metallic foam in a non-foamed original state that has a metal powder and a metal hydride, wherein the intumescent metallic foam foams into a foamed state under an effect of heat.

2. The device according to claim 1 , wherein the intumescent layer is fastened directly to the high-pressure gas tank.

3. The device according to claim 2 , wherein the intumescent layer at least partially bears on the high-pressure gas tank.

4. The device according to claim 1 , wherein the intumescent layer at least partially bears on the high-pressure gas tank.

5. The device according to claim 1 , wherein the intumescent metal material is an intumescent aluminum material.

6. The device according to claim 1 , wherein the intumescent layer encloses at least half of a cross-section of the high-pressure gas tank.

7. The device according to claim 5 , wherein the intumescent layer encloses at least half of a cross-section of the high-pressure gas tank.

8. The device according to claim 1 , wherein the intumescent layer is configured to have a C-shaped cross-section in an interior of which the high-pressure gas tank is at least partially receivable.

9. The device according to claim 1 , wherein the intumescent layer is configured as a tube in an interior of which the high-pressure gas tank is at least partially receivable.

10. The device according to claim 1 , wherein the intumescent layer has a wall thickness of 0.1 mm to 40 mm.

11. The device according to claim 1 , wherein the intumescent layer has a wall thickness of 3 mm to 20 mm.

12. The device according to claim 1 , wherein the intumescent layer has a wall thickness of 6 mm to 15 mm.

13. The device according to claim 1 , wherein the intumescent layer has at least one fastener configured to fasten a safety valve.

14. A tank for a motor vehicle, comprising:
a high-pressure gas tank for the motor vehicle; and
a device for protecting the high-pressure gas tank, the device comprising:
an intumescent layer disposed and configured so as to at least partially shield the high-pressure gas tank, wherein
the intumescent layer comprises an intumescent metal material and the intumescent metal material is an intumescent metallic foam in a non-foamed original state that has a metal powder and a metal hydride, wherein the intumescent metallic foam foams into a foamed state under an effect of heat.

15. The tank according to claim 14 , wherein the high-pressure gas tank comprises a fiber-reinforced layer, wherein
the intumescent layer at least partially surrounds the fiber-reinforced layer of the high-pressure gas tank.

16. The tank according to claim 15 , wherein the intumescent metal material is an intumescent aluminum material.

17. The tank according to claim 16 , wherein the intumescent layer encloses at least half of a cross-section of the high-pressure gas tank.

18. The tank according to claim 14 , wherein the intumescent layer has a wall thickness of 0.1 mm to 40 mm.

19. The tank according to claim 14 , further comprising a safety valve fastened to the intumescent layer.

20. A method for producing a high-pressure gas tank, the method comprising the acts of:
providing a core of the high-pressure gas tank;
providing an intumescent layer having an intumescent metal material wherein the intumescent metal material is an intumescent metallic foam in a non-foamed original state that has a metal powder and a metal hydride, wherein the intumescent metallic foam foams into a foamed state under an effect of heat; and
at least partially sliding the intumescent layer onto the core of the high-pressure gas tank or at least partially wrapping the core of the high-pressure gas tank with the intumescent layer.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Schwartz Christophe

Classifications

• F17C2209/232

  of walls · CPC title

• F17C2221/031

  Air · CPC title

• F17C2201/056

  Small (<1 m3) · CPC title

• F17C2209/227

  by adhesive means · CPC title

• F17C2221/013

  Carbon dioxide · CPC title