Electric fuse box or junction box assembly with a high voltage electric line cutter device

Patent metadata

Field	Value
Publication number	US-10763064-B2
Application number	US-201816217182-A
Country	US
Kind code	B2
Filing date	Dec 12, 2018
Priority date	Dec 12, 2018
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

An electric fuse box or junction box assembly has a high voltage electric line cutter assembly inside an electric fuse box or junction box. The assembly has a box housing for connecting a plurality of electrical lines or connections to a power source. The housing has a pair of mounting stanchions for affixing the high voltage electric line cutter assembly with an electric current carrying busbar having a pair of stub ends. Each stub end of the busbar for carrying electric current from the power source to the plurality of electrical lines is secured to one of the mounting stanchions. Each mounting stanchion has an attachment platform for attaching and supporting the stub end of the busbar and an underlying chamber below the attachment platform for receiving exhaust gases generated when the high voltage electric line cutter assembly is activated.

First claim

What is claimed is:

1. An electric fuse box or junction box assembly comprising:
a high voltage electric line cutter assembly;
a fuse box or junction box housing connected to a plurality of electrical lines, the housing having a pair of mounting stanchions affixed to the high voltage electric line cutter assembly via a busbar having a pair of stub ends;
wherein each mounting stanchion has an attachment platform attached to and supporting each of the stub ends of the busbar and an underlying chamber below the attachment platform configured to receive exhaust gases generated when the high voltage electric line cutter assembly is activated and the busbar is broken; and
wherein the high voltage electric line cutter assembly has a pair of exhaust ports and when the high voltage electric line cutter assembly is attached to the stanchions, the exhaust ports align with an opening in each stanchion to allow exhaust gas from the high voltage electric line cutter assembly to enter the underlying chamber.

2. The assembly of claim 1 further comprising a pair of auxiliary gas expansion volumes.

3. The assembly of claim 1 wherein the underlying chamber has an open end opposite the attachment platform.

4. The assembly of claim 1 further comprises a cover to enclose the junction box housing.

5. The assembly of claim 1 wherein the high voltage electric line cutter assembly comprises:
a first housing with a chamber;
a second housing with a chamber, the second housing affixed to the first housing;
a piston contained inside one of either the first housing chamber or the second housing chamber;
an igniter for driving the piston from one chamber to the other chamber;
wherein the busbar is rigidly held between the first and second housings and spans across said first and second housing chambers; and
wherein upon igniting the igniter, the piston breaks a portion of the busbar moving the piston and the broken portion of the busbar from inside one of either the first housing chamber or the second housing chamber into the other of the first housing chamber or the second housing chamber thereby stopping the electric current flow.

6. The assembly of claim 5 wherein the piston is at least partially formed as an insulator to prevent electric discharge.

7. The assembly of claim 5 wherein the first and second housings are made at least partially non-electrically conductive.

8. The assembly of claim 5 wherein the first and second housings are removably attached to the other by one or more fasteners.

9. The assembly of claim 8 wherein the busbar is held rigidly by a compression force between the first and second housings and at the attachment to the pair of mounting stanchions.

10. The assembly of claim 9 wherein the busbar, when broken, remains rigidly held at the two opposed sides at the attachment to the mounting stanchions.

11. The assembly of claim 10 wherein the busbar further comprises a pair of fracture locations, each fracture location being internal and adjacent to the first and second housings and of a reduced thickness when viewed in a cross-section of the busbar, the fracture location configured to break upon an impact from the piston.

12. The assembly of claim 5 wherein the igniter is electrically activated in the event of a signal from an Electronic Control Unit (ECU).

13. The assembly of claim 12 wherein the high voltage electric line cutter assembly is configured to be used in a vehicle capable of generating high voltages.

14. The assembly of claim 13 wherein the high voltage electric line cutter assembly is activated by a signal from the Airbag Electronic Control Unit in the event of a vehicle crash.

15. The assembly of claim 5 wherein the igniter is a pyrotechnic device and further comprises a propellant charge squib.

16. The assembly of claim 1 further comprising one or more filters for cooling and deionization of a gas plasma from an arc and the ignitor and to capture debris generated by the ignitor and during the breaking of the busbar.

17. The assembly of claim 16 wherein the filter is made of a high temperature resistant material.

18. An electric fuse box or junction box assembly comprising:
a high voltage electric line cutter assembly, the high voltage electric line cutter assembly comprising:
a first housing with a chamber;
a second housing with a cylinder, cuboid or prism chamber, the second housing affixed to the first housing;
a piston contained inside one of the first housing chamber or the second housing chamber;
an igniter for driving the piston from one chamber to the other chamber;
wherein a busbar is rigidly held between the first and second housings and spans across said first and second housing chambers;
wherein upon igniting the igniter, the piston breaks a portion of the busbar moving the piston and the broken portion of the busbar from inside one of either the first housing chamber or the second housing chamber into the other of the first housing chamber or the second housing chamber thereby stopping the electric current flow;
a fuse box or junction box housing connected to a plurality of electrical lines, the fuse box or junction box housing having a pair of mounting stanchions affixed to the high voltage electric line cutter assembly via the busbar having a pair of stub ends;
wherein each mounting stanchion has an attachment platform attached to and supporting each of the stub ends of the busbar and an underlying chamber below the attachment platform configured to receive exhaust gases generated when the high voltage electric line cutter assembly is activated and the busbar is broken; and
wherein the high voltage electric line cutter assembly has a pair of exhaust ports and when the high voltage electric line cutter assembly is attached to the stanchions, the exhaust ports align with an opening in each stanchion to allow exhaust gas from the high voltage electric line cutter assembly to enter the underlying chamber.

Assignees

• Key Safety Systems Inc

Inventors

• Mauthofer Alois
• Pieruch Martin
• Volkmann Matthias

Classifications

• H01H2039/008

  using the switch for a battery cutoff · CPC title

• H01H39/006 Primary

  Opening by severing a conductor · CPC title

• H01H9/342

  Venting arrangements for arc chutes · CPC title

• H01H71/02

  Housings; Casings; Bases; Mountings · CPC title

• B23D15/14

  actuated by fluid or gas pressure · CPC title