Battery fuse assembly

• US 7,924,137 B2
• Filed: 09/10/2007
• Issued: 04/12/2011
• Est. Priority Date: 09/10/2007
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Rahman, Naeem, Czyz, Anthony, Ha, Cuong
• Primary Examiner(s): Vortman; Anatoly
• Application Number:
  US11/852,851
• Publication Number:
  US 20090066469A1
• Time in Patent Office: 1,310 Days
• Field of Search: 337/158, 337/159, 337/187, 337/186
• US Class Current: 337/187
• CPC Class Codes: H01H 2085/025 Structural association with a binding post of a storage battery
• CPC Class Codes: H01H 2085/383 with insulating stationary parts
• CPC Class Codes: H01H 85/003 casings for the fusible element
• CPC Class Codes: H01H 85/044 General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified H01H85/046 - H01H85/048 take precedence
• CPC Class Codes: H01H 85/17 characterised by the casing material
• CPC Class Codes: H01H 85/38 Means for extinguishing or suppressing arc by powder filling H01H85/18; by mechanical tension applied to fusible member H01H85/36
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A fuse includes a fusible element and a body member encased within a heat-resistant housing. The fusible element is configured to open an electrical circuit coupled to a storage battery in response to an over-current in the electrical circuit. The housing is configured to contain an arc generated by the fusible element in response to the over-current and to shield the arc and the fusible element from ambient particles. Thus, the fuse is ignition protected. The body member includes an insulating material configured to interrupt the arc. The housing includes an opening configured to receive a terminal of the storage battery or a terminal of a mounting plate. An insulating material disposed about a first end of the mounting plate terminal is configured to electrically isolate the fuse and a power supply cable in the electrical circuit from the mounting plate terminal.

Claims

1. A fuse, comprising:

a housing defining an upper surface and a lower surface, wherein the upper surface includes a first terminal and the lower surface includes a second terminal, and wherein the housing, the first terminal and the second terminal define a central opening extending between the upper and lower surfaces, the central opening configured to receive at least one of a terminal of a storage battery and a stud of a mounting plate associated with the storage battery; and

a fusible element having an upper portion and a lower portion, the upper portion being engaged to the first terminal and the lower portion being engaged to the second terminal;

the fusible element further comprising a fault element extending between the upper portion and the lower portion, the fault element configured to open an electrical circuit coupled to the storage battery in response to an over-current in the electrical circuit, wherein the fault element is encased within the housing; and

wherein the housing comprises an insulating material configured to contain an arc generated by the fault element in response to the over-current in the electrical circuit, shield the fusible element from ambient particles, and prevent the arc from mixing with such ambient particles.

2. The fuse of claim 1, further comprising a body member encased within the housing, wherein the body member is separately provided from the housing and the fusible element.

3. The fuse of claim 2, wherein the body member has an upper surface, a lower surface, and a side surface, and

wherein the fusible element is substantially disposed about the side surface and includes an upper portion that engages at least a portion of the upper surface, a lower portion that engages at least a portion of the lower surface, and the fault element that engages the side surface.

4. The fuse of claim 1, wherein the housing comprises a heat-resistant plastic.

5. The fuse of claim 1, wherein the housing comprises a heat-resistant material selected from the group consisting of:

PolyPhenylene Sulfide and Polyethersulfone.

6. The fuse of claim 1, wherein the fault element includes a layer of electrically non-conductive plastic.

7. The fuse of claim 6, wherein the electrically non-conductive plastic comprises Silicone.

8. The fuse of claim 1, wherein the first terminal comprises a ring terminal configured to engage a ring collar of a power supply cable coupled to the electrical circuit.

9. The fuse of claim 1, wherein the fuse has a substantially cubical shape.

10. The fuse of claim 1, wherein the ambient particles comprise water particles.

11. The fuse of claim 1, wherein the fuse is ignition protected.

12. A fuse, comprising:

a single piece housing defining a central opening configured to receive at least one of a terminal of a storage battery and a stud of a mounting plate associated with the storage battery, wherein the single piece housing defines an upper surface and a lower surface, and wherein the upper surface includes a first terminal and the lower surface includes a second terminal, the central opening extending through and between the first and second terminals; and

a fusible element encased within the single piece housing and comprising a fault element configured to open an electrical circuit coupled to the storage battery in response to an over-current in the electrical circuit, the fault element comprising a layer of electrically non-conductive plastic.

13. The fuse of claim 12, wherein the single piece housing comprises a material therein configured to shield the fusible element from ambient water particles.

14. The fuse of claim 12, wherein the single piece housing comprises a member further configured to contain an arc generated by the fault element in response to the over-current in the electrical circuit and to prevent the arc from mixing with ambient particles.

15. The fuse of claim 14, further comprising a body member separately formed from but encased within the single piece housing and comprising an insulating material configured to interrupt the arc.

16. The fuse of claim 15, wherein the body member has an upper surface, a lower surface, and a side surface, and

wherein the fusible element is substantially disposed about the side surface and includes an upper portion that engages at least a portion of the upper surface, a lower portion that engages at least a portion of the lower surface, and the fault element that engages the side surface.

17. The fuse of claim 12, wherein the single piece housing comprises a heat-resistant plastic.

18. The fuse of claim 12, wherein the single piece housing comprises a heat-resistant material selected from the group consisting of:

PolyPhenylene Sulfide and Polyethersulfone.

19. The fuse of claim 12, wherein the electrically non-conductive plastic comprises Silicone.

20. The fuse of claim 12, further comprising a ring terminal disposed proximate an upper surface of the single piece housing and configured to engage a ring collar of a power supply cable coupled to the electrical circuit.

21. The fuse of claim 12, wherein the single piece housing has a substantially cubical shape.

22. The fuse of claim 12, wherein the fuse is ignition protected.

23. The fuse of claim 12, wherein the fusible element includes a fault element connected between the first terminal and the second terminal, the fault element being spaced from the central opening and shielded by the single piece housing.

24. The fuse of claim 23, further comprising a body member encased within the single piece housing, wherein the body member is separately provided from the single piece housing and the fusible element.

25. The fuse of claim 24, wherein the body member has an upper surface, a lower surface, and a side surface, and

wherein the fusible element is substantially disposed about the side surface and includes an upper portion that engages at least a portion of the upper surface, a lower portion that engages at least a portion of the lower surface, and the fault element that engages the side surface.

26. The fuse of claim 12, wherein the first terminal comprises a ring terminal configured to engage a ring collar of a power supply cable coupled to the electrical circuit.

27. The fuse of claim 14, wherein the ambient particles comprise water particles.