Terminal cover for a battery pack

• US 5,200,280 A
• Filed: 04/14/1992
• Issued: 04/06/1993
• Est. Priority Date: 09/05/1991
• Status: Expired due to Fees

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Karasa, Alvydas P.
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US07/869,054
• Time in Patent Office: 357 Days
• Field of Search: 429/65, 429/99, 429/100, 429/159, 429/122, 429/123, 429/163, 206/333, 206/432, 206/497
• US Class Current: 429/65
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 6/44 of tubular or cup-shaped cells

Abstract

An enclosure 12 for a disposable battery pack 10 for a cordless power tool consists of a pair of end caps 26, 28 retained on the opposite ends of the pack by a central sleeve 30 of adhesive tape. The end caps are of unitary construction, formed from thin plastic sheet, and include raised terminal covers 32, 34, 36 for shielding exposed terminals 20, 22, 24 from inadvertent outside contact. Each terminal cover has a severable tip 50 which is removed when the pack is to be used, to provide an opening 56 for insertion of a terminal connector 60.

Claims

1. An enclosure for a battery pack, the pack having opposite first and second ends and including at least one cell and a raised and exposed terminal carried at the first end for providing electrical contact with the at least one cell comprising:

a first end cap for capping the first end of the battery pack and including a raised terminal cover having a plurality of walls for enclosing the terminal so as to render it contactable by an outside element only by penetration of that element within the walls of the terminal cover; and

means for surrounding the battery pack and overlappingly engaging the end cap so as to retain the end cap on the first end of the battery pack.

2. The enclosure of claim 1 wherein the first end cap includes a side wall for, in assembly, extending longitudinally over and closely fitting the first end of the battery pack and wherein the means for surrounding the battery pack comprises a band encircling the battery pack and said band provides the overlapping engagement of the end cap.

3. The enclosure of claim 2 wherein the band is made from a pliable material.

4. The enclosure of claim 3 wherein the band is formed from a length of self-adhesive tape.

5. The enclosure of claim 3 wherein the band comprises a sleeve of shrink wrap material.

6. The enclosure of claim 2 and including a second end cap for capping the second end of the battery pack, said second end cap also including a side wall for, in assembly, extending longitudinally over and closely fitting the second end of the battery pack and wherein said band overlappingly engages the second end cap so as to retain it on the second end of the battery pack.

7. The enclosure of claim 1 and including a second end cap for capping the second end of the battery pack and wherein the respective first and second caps each include a side wall for, in assembly, extending longitudinally over and closely fitting the respective ends of the battery pack and wherein, in assembly, the side walls of the respective first and second end caps overlap longitudinally and said means for surrounding the battery pack comprises the bonding together of the overlapping walls of the respective end caps.

8. The enclosure of claim 1 wherein the first end cap is of unitary construction and formed from a single sheet of thin plastic material.

9. The enclosure of claim 8 wherein the plastic material is not more than 1 mm thick before the end cap is formed.

10. The enclosure of claim 1 wherein the terminal cover is closed and the walls of the cover include a severable portion and the cover is configured so that severance of the severable portion establishes a pre-defined opening in the walls for specific access to the terminal and so that the terminal remains substantially enclosed by the walls.

11. The enclosure of claim 1 wherein the first end cap includes an end wall for transverse juxtaposition with the first end of the battery pack.

12. The enclosure of claim 11 wherein the means for surrounding the battery pack comprises a sleeve of shrink wrap material which, in assembly, extends over the end wall of the first end cap to retain it on the first end of the battery pack.

13. The enclosure of claim 1 wherein the at least one cell comprises a plurality of cells and at least some of the cells are elongated, said cells each having a longitudinal axis, and at least two of said cells are disposed with their longitudinal axes parallel to each other and wherein said means for surrounding the battery pack grippingly engages said cells, tending to hold them in fixed relationship, one with the other.

14. An end cap for use with a battery pack, said pack having opposite first and second ends and including at least one cell and a raised and exposed terminal carried at the first end for providing electrical contact with the at least one cell comprising:

a thin transverse wall of the end cap for juxtaposing transversely with and capping the first end of the battery pack; and

a raised terminal cover having a plurality of walls and integral with the transverse wall, for registering with and enclosing the terminal so as to render it contactable by an outside body only by penetration of the body within the walls of the terminal cover.

15. The end cap of claim 14 wherein the terminal cover is closed and the walls of the cover include a severable portion and the cover is configured so that severance of said portion establishes a pre-defined opening in the walls for specific access to the terminal and so that the terminal remains substantially enclosed within the walls.

16. The end cap of claim 14 wherein the end cap includes a side wall for, in assembly, extending longitudinally over and closely fitting the first end of the battery pack, said wall providing engageable means for retaining the end cap on the first end of the battery pack.

17. An enclosed battery pack comprising:

a battery pack having opposite first and second ends and including at least one cell and a raised and exposed terminal carried at the first end for providing electrical contact with the at least one cell;

a first end cap for capping the first end of the battery pack and including a raised terminal cover having a plurality of walls for enclosing the terminal so as to render it contactable by an outside element only by penetration of that element within the walls of the terminal cover; and

means for surrounding the battery pack and overlappingly engaging the end cap so as to retain the end cap on the first end of the battery pack.

18. The enclosed battery pack of claim 17 wherein the first end cap includes a side wall for, in assembly, extending longitudinally over and closely fitting the first end of the battery pack and wherein the means for surrounding the battery pack comprises a band encircling the battery pack and said band provides the overlapping engagement of the end cap.

19. The enclosed battery pack of claim 18 and including a second end cap for capping the second end of the battery pack, said second end cap also including a side wall for, in assembly, extending longitudinally over and closely fitting the second end of the battery pack and wherein said band overlappingly engages the second end cap so as to retain it on the second end of the battery pack.

20. The enclosed battery pack of claim 17 wherein the first end cap is of unitary construction and formed from a single sheet of thin plastic material.

21. The enclosed battery pack of claim 17 wherein the terminal cover is closed and the walls of the cover include a severable portion and the cover is configured so that severance of the severable portion establishes a pre-defined opening in the walls for specific access to the terminal and so that the terminal remains substantially enclosed by the walls.

22. An enclosure for a battery pack, the pack having opposite first and second ends and including at least one cell and a projecting and exposed terminal carried at the first end for providing electrical contact with the at least one cell, comprising:

a first end cap for capping the first end of the battery pack and including a wall transverse to said first end and a raised terminal cover extending from the transverse wall and integral with the cap, the terminal cover having a plurality of walls for enclosing the terminal so as to render it contactable by an outside element only by penetration of that element within the walls of the terminal cover; and

means for surrounding the battery pack and overlappingly engaging the end cap so as to retain the end cap on the first end of the battery pack.

23. The enclosure of claim 22 and including a second end cap for capping the second end of the battery pack, said first and second end caps each including a side wall for, in assembly, extending longitudinally over and closely fitting the respective first and second ends of the battery pack and wherein the means for surrounding the battery pack comprises a band encircling the battery pack and said band overlappingly engages the first and second end caps so as to retain them on the respective first and second ends of the battery pack.

24. The enclosure of claim 22 wherein the first end cap is of unitary construction and formed from a single sheet of thin plastic material.