Safety system for a pressure vessel of a motor vehicle

Patent metadata

Field	Value
Publication number	US-11199274-B2
Application number	US-201916363547-A
Country	US
Kind code	B2
Filing date	Mar 25, 2019
Priority date	Sep 28, 2016
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

A thermally activatable safety valve has at least one microwave transmitter and microwave transmitter component. The microwave transmitter and/or the microwave transmitter component is designed to heat at least one thermally activatable opening element.

First claim

What is claimed is:

1. A thermally activatable safety valve, comprising:
at least one microwave transmitter component; and
at least one thermally activatable opening element of the safety valve, wherein
the microwave transmitter component is configured to generate heat to heat the at least one thermally activatable opening element.

2. The safety valve as claimed in claim 1 , wherein
the microwave transmitter component is configured to heat at least one further portion of the safety valve, and
the at least one further portion is configured and arranged such that the at least one further portion at least partly heats the thermally activatable opening element.

3. The safety valve as claimed in claim 1 , wherein
the thermally activatable opening element comprises one or more of:
a fusible solder, a glass ampoule, and a shape-memory material.

4. A safety system for releasing pressure in at least one pressure container of a motor vehicle, comprising:
at least one safety valve as claimed in claim 1 , wherein
the safety valve is configured to release the pressure.

5. The safety system as claimed in claim 4 , further comprising:
at least one electrical switch configured to interrupt a power supply of the microwave transmitter component for as long as there is no accident event, no vehicle fire, and/or no third-party vehicle-external signal.

6. The safety system as claimed in claim 4 , wherein
the microwave transmitter component is supplied with electrical power by a vehicle-internal energy source.

7. The safety system as claimed in claim 6 , wherein
the vehicle-internal energy source is a thermoelectric generator or a battery.

8. The safety system as claimed in claim 4 , further comprising:
a delay device configured to delay operation of the microwave transmitter component.

9. A motor vehicle, comprising:
a safety system as claimed in claim 4 ; and
at least one pressure container,
wherein the safety system is configured to release pressure in the at least one pressure container.

10. The motor vehicle as claimed in claim 9 , further comprising:
at least one electrical connector for connecting a vehicle-external energy source in order to provide electrical power to the microwave transmitter component.

11. The motor vehicle as claimed in claim 9 , further comprising:
at least one distal vehicle-side coil and at least one proximal vehicle-side coil, wherein
the distal vehicle-side coil is further away from the safety valve than the proximal vehicle-side coil, and
the proximal vehicle-side coil is the microwave transmitter component configured to heat the at least one thermally activatable opening element.

12. The safety system for releasing pressure in the at least one pressure container of a motor vehicle, comprising:
at least one thermally activatable safety valve which includes at least one microwave transmitter component and at least one thermally activatable opening element, the at least one microwave transmitter component being configured to heat the at least one thermally activatable opening element,
wherein
the microwave transmitter component is supplied with electrical power by a vehicle-external energy source, and
the safety system is configured to release pressure in the at least one pressure container.

13. A motor vehicle comprising:
at least one pressure container; and
a safety system for releasing pressure in the at least one pressure container of the motor vehicle, the safety system including at least one thermally activatable safety valve which includes at least one microwave transmitter component and at least one thermally activatable opening element, the at least one microwave transmitter component being configured to generate heat to heat the at least one thermally activatable opening element; and
at least two electrical connectors arranged at a distance from one another at different points of the motor vehicle,
wherein the safety system is configured to release pressure in the at least one pressure container.

14. A method for releasing pressure in a pressure container, the method comprising the acts of:
generating heat with at least one microwave transmitter component;
heating, using the heat generated by at least one microwave transmitter component, a thermally activatable opening element of a thermally activated safety valve; and
upon reaching a trigger temperature of the thermally activatable opening element of the thermally activatable safety valve, releasing pressure in the pressure container.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Kunberger Jan-Mark
• Pelger Andreas

Classifications

• F17C2205/0314

  breakable, e.g. with burst discs · CPC title

• F17C2223/033

  Small pressure, e.g. for liquefied gas · CPC title

• F16K17/40

  with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint (valves opening on surplus pressure F16K17/14) · CPC title

• F17C13/123

  for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons · CPC title

• F17C2270/0168

  by vehicles · CPC title