Fuse having an explosion chamber

Patent metadata

Field	Value
Publication number	US-2016336131-A1
Application number	US-201615154901-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	May 13, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

Embodiments disclose a fuse comprising a one power lead, an explosion chamber and an isolating chamber, wherein the fuse is designed such that a power lead can be broken into at least two parts by an explosion triggered in an explosion chamber. The two parts are separated from each other in an associated isolating chamber by a respective electrically insulating partition. Embodiments disclose a method comprising a power lead, an explosion chamber and an isolating chamber, wherein an explosion is triggered in the explosion chamber so that the power lead is broken into at least two parts and bent into the isolating chamber such that at least two parts are separated from one another by an electrically insulating partition. The present disclosure can be applied to pyrotechnic fuses for vehicles and to high-voltage fuses.

First claim

1 - 8 . (canceled)

9 . A fuse for causing a break in a power lead, wherein the power lead has a predetermined breaking point along a length of the power lead, the fuse comprising:
an explosion chamber for triggering an explosion configured to cause a break in the power line at the predetermined breaking point; an isolating chamber through which a portion of the power lead extends, wherein the portion of the power lead extending through the isolating chamber includes the predetermined breaking point of the power lead; and an electrically insulating partition extending across the power lead and spaced from the power lead; wherein:
the power lead is configured to break into at least two parts at the predetermined breaking point by the explosion triggered in the explosion chamber, and
the electrically insulating partition is configured to keep the at least two parts of the power lead electrically isolated from each other in the isolating chamber.

10 . The fuse according to claim 9 , wherein the power lead separates the explosion chamber and the isolating chamber, and the electrically insulating partition is positioned within the isolating chamber.

11 . The fuse according to claim 9 , wherein the electrically insulating partition includes an isolating element configured to press onto the power lead at the predetermined breaking point in order to break the power lead at the predetermined breaking point.

12 . The fuse according to claim 11 , wherein:
the isolating element further includes a sealing plate having an isolating web protruding in the direction of the power lead, the sealing plate configured to form a displaceable wall of the explosion chamber, and the isolating chamber is disposed on the side of the power lead facing away from the isolating element, the isolating chamber configured to receive the isolating web between the separated parts.

13 . The fuse according to claim 9 , wherein the power lead is configured to break at only the predetermined breaking point into exactly two parts, and the fuse includes exactly one electrically insulating partition for each power lead.

14 . The fuse according to claim 9 , further comprising:
a magnet for providing a magnetic field configured to suppress formation of an arc between the at least two parts.

15 . A method for operating a fuse comprising at least one power lead, an explosion chamber and an isolating chamber, wherein the method comprises:
deforming the power lead by an application of pressure when an explosion is triggered in the explosion chamber; separating the power lead into at least two parts at a predetermined breaking point; bending each separated part towards a different side of an electrically insulating partition; and isolating the bent parts from each other by the partition, wherein the partition is spaced from the power lead.

16 . The method according to claim 15 , wherein the power lead serves as a wall of the explosion chamber, and the electrically insulating partition is located in the isolating chamber.

17 . The method according to claim 15 , wherein the method further comprises:
pressing an isolating element of the partition onto the power lead at the predetermined breaking point; and moving the isolating element into the isolating chamber after separating the power lead, until the isolating element is disposed between the separated parts.

18 . A high-voltage pyrofuse for causing a break in a power lead, wherein the power lead has a predetermined breaking point along a length of the power lead, the fuse comprising:
an explosion chamber for triggering an explosion configured to cause a break in the power line at the predetermined breaking point; an isolating chamber through which a portion of the power lead extends, wherein the portion of the power lead extending through the isolating chamber includes the predetermined breaking point of the power lead; and an electrically insulating partition extending across the power lead and spaced from the power lead; wherein:
the power lead is configured to break into at least two parts at the predetermined breaking point by the explosion triggered in the explosion chamber, and
the electrically insulating partition is configured to isolate the at least two parts from each other.

19 . The pyrofuse according to claim 18 , wherein:
the power lead separates the explosion chamber and the isolating chamber, and the electrically insulating partition is positioned within the isolating chamber.

20 . The pyrofuse according to claim 18 , wherein the electrically insulating partition includes an isolating element configured to press onto the power lead at the predetermined breaking point in order to break the power lead at the predetermined breaking point.

21 . The pyrofuse according to claim 20 , wherein:
the isolating element further includes a sealing plate having an isolating web protruding in the direction of the power lead, the sealing plate configured to form a displaceable wall of the explosion chamber, and the isolating chamber is disposed on the side of the power lead facing away from the isolating element, the isolating chamber configured to receive the isolating web between the first and second parts.

22 . The pyrofuse according to claim 18 , further comprising:
a magnet for providing a magnetic field configured to suppress formation of an arc between the at least two parts.

Assignees

• Draexlmaier Lisa Gmbh

Inventors

• Fellmer Marko
• Gruber Christian
• Faltermeier Peter

Classifications

• H01H9/443

  using permanent magnets · CPC title

• H01H9/34

  Stationary parts for restricting or subdividing the arc, e.g. barrier plate · CPC title

• H01H33/182

  using permanent magnets (H01H33/187 takes precedence) · CPC title

• H01H39/006 Primary

  Opening by severing a conductor · CPC title