Electrical device having a discriminating, rechargeable battery system

• US 5,652,496 A
• Filed: 02/12/1996
• Issued: 07/29/1997
• Est. Priority Date: 02/12/1996
• Status: Expired due to Fees

• Current Assignee: Bank of New York Mellon Corporation
• Original Assignee: Spectrum Brands, Inc. (Spectrum Brands Holdings, Inc.)
• Inventors: Pilarzyk, James G., Ruth, Steven R., Sengupta, Upal
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): SHIN, KYUNG E
• Application Number:
  US08/606,015
• Time in Patent Office: 533 Days
• Field of Search: 320/2, 320/3-4, 320/15, 429/7, 429/178
• US Class Current: 320/106
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

In accordance with the present invention, a portable electrical device with a discriminating, rechargeable battery system is provided. The rechargeable battery system includes a load circuit connected to a discharge contact adapted to electrically couple to an electrical terminal on a battery to receive power therefrom whereby either a first battery having a predetermined feature or a second battery lacking the predetermined feature may be coupled thereto. The system further includes a charger circuit connected to a charging contact adapted to electrically couple to the same electrical terminal on the battery to provide a charging current to the battery from an outside power source. An inhibitor is associated with the charger circuit and is adapted to cooperate with the predetermined feature to only allow the coupling of the charging contact with the electrical terminal of the first battery thereby preventing the coupling of the charging contact with the electrical terminal of the second battery. As such, only a battery having the predetermined feature may receive the charging current.

Claims

1. An electrical device for use with a first battery having an electrical terminal that includes a predetermined feature or a second battery having an electrical terminal lacking said predetermined feature, comprising:

a load circuit;

a discharge contact connectable to said load circuit and couplable with said electrical terminal of either said first battery or said second battery;

a charger circuit;

a charging contact connectable to said charger circuit and couplable with said electrical terminal of said first battery to allow a charging current to be provided to said first battery from an outside power source; and

an inhibitor cooperable with said predetermined feature to allow the coupling of said charging contact with said electrical terminal of said first battery and to prevent the coupling of said charging contact with said electrical terminal of said second battery whereby only said first battery may receive said charging current.

2. The electrical device as recited in claim 1, wherein said inhibitor is disposed between said discharge contact and said charging contact.

3. The electrical device as recited in claim 1, wherein said inhibitor comprises a barrier of non-conductive material having an opening therethrough sized and configured to accept passage of said predetermined feature.

4. The electrical device as recited in claim 1, wherein said inhibitor has a first opening extending partially therethrough sized and configured to accept said electric terminal of said second battery and a second opening extending completely therethrough sized and configured to accept said electric terminal of said first battery.

5. The electrical device as recited in claim 4, wherein said second opening is smaller in size than said first opening and said second opening is disposed proximate to the center of said first opening.

6. The electrical device as recited in claim 5, wherein said discharge contact is disposed on a first side of said inhibitor proximate to said first opening and said charging contact is disposed on an opposite side of said inhibitor proximate to said second opening.

7. The electrical device as recited in claim 6, wherein said discharge contact comprises a planar plate having a cutout portion between a pair of extending side arms and wherein said cutout portion substantially, coaxially aligns with said first opening.

8. The electrical device as recited in claim 1, further comprising a first casing in which said load circuit is housed and a second casing in which said charger circuit is housed.

9. The electrical device as recited in claim 8, wherein said discharge contact, charging contact, and inhibitor comprise a dual contact, said dual contact being housed in said second casing and separable from said load circuit, and wherein said second casing is separable from said first casing.

10. The electrical device as recited in claim 1, wherein said load circuit is connected to selectively accept power from said outside power source, said charger circuit selectively supplying said charging current to said first battery concurrently with said load circuit accepting power from said outside power source.

44. The electrical device as recited in claim 1, further comprising a switch for disconnecting said discharge contact from said load circuit when said outside power source is utilized to power said device.

45. The electrical device as recited in claim 44, wherein said switch comprises a transistor.

48. The electrical device as recited in claim 1, wherein said load circuit is coupled to a plurality of discharge contacts, said charger circuit being coupled to a plurality of charging contacts, and each of said charging contacts has an inhibitor associated therewith, whereby a plurality of said first batteries or said second batteries may be disposed within said electrical device.

49. The electrical device as recited in claim 48, further comprising a switching circuit connected to said plurality of charging contacts for use in limiting the providing of said charging current to a preselected number of said plurality of first batteries over a period of time.

50. The electrical device as recited in claim 49, wherein only one of said plurality of first batteries is provided said charging current over said period of time.

11. A discriminating, rechargeable battery system for use in an electrical device, comprising:

a first battery having a predetermined feature;

a load circuit;

a discharge contact coupled to said load circuit and to either an electrical terminal of said first battery or an electrical terminal of a second battery lacking said predetermined feature;

a charger circuit;

a charging contact coupled to said charger circuit and to said electric terminal to provide a charging current thereto from an outside power source; and

an inhibitor associated with said charger circuit adapted to cooperate with said predetermined feature to allow the coupling of said charging contact with said electrical terminal of said first battery and to prevent the coupling of said charging contact with said electrical terminal of said second battery whereby only said first battery may receive said charging current.

12. The system as recited in claim 11, wherein said inhibitor is disposed between said discharge contact and said charging contact.

13. The system as recited in claim 11, wherein said inhibitor has an opening therethrough which is sized and configured to accept said predetermined feature.

14. The system as recited in claim 13, wherein said predetermined feature of said first battery comprises a positive terminal having a nubbin of predetermined diameter.

15. The system as recited in claim 14, wherein said discharge contact is disposed on a side of said inhibitor proximate to said battery and said charging contact is disposed on an opposite side of said inhibitor removed from said battery.

16. The system as recited in claim 15, further comprising a spring contact connectable with both said load circuit and said charger circuit, said spring contact urging either said first battery or said second battery into engagement with said inhibitor.

17. The system as recited in claim 16, wherein said predetermined feature of said first battery comprises a positive terminal that includes a nubbin having a first diameter.

18. The system as recited in claim 17, wherein said second battery includes a nubbin having a second diameter larger than said first diameter and said inhibitor has a first opening extending partially therethrough sized and configured to accept the nubbin of said second battery and a second opening extending completely therethrough sized and configured to accept passage of the nubbin of said first battery.

19. The system as recited in claim 18, wherein said discharge contact is disposed on a first side of said inhibitor proximate to said first opening and said charging contact is disposed on an opposite side of said inhibitor proximate to said second opening.

20. The system as recited in claim 19, wherein said discharge contact comprises a metallic plate having a cutout portion flanked by a pair of extending side arms, said cutout portion being substantially coaxially aligned with said first opening.

21. The system as recited in claim 20 wherein said discharge contact is disposed at an angle relative to said inhibitor and cooperable with said spring contact to engage said battery therebetween.

46. The electrical device as recited in claim 11, further comprising a switch for disconnecting said discharge contact from said load circuit when said outside power source is utilized to power said device.

47. The electrical device as recited in claim 46, wherein said switch comprises a transistor.

51. The battery system as recited in claim 11, wherein said load circuit is coupled to a plurality of discharge contacts, said charger circuit being coupled to a plurality of charging contacts, and each of said charging contacts has an inhibitor associated therewith whereby a plurality of said first batteries or said second batteries may be disposed within said electrical device.

52. The battery system as recited in claim 51, further comprising a switching circuit connected to said plurality of charging contacts for use in selectively limiting said charging current to a preselected number of said plurality of first batteries over a period of time.

53. The battery system as recited in claim 52, wherein only one of said plurality of first batteries is provided said charging current over said period of time.

22. A battery receptacle for use with a first battery having a predetermined feature or a second battery lacking said predetermined feature, comprising:

a non-conductive support;

a discharge contact mounted to said support adapted to electrically couple to an electrical terminal of either said first battery or said second battery;

a charging contact mounted to said support adjacent said discharge contact; and

an inhibitor mounted to said support and disposed between said discharge contact and said charging contact, said inhibitor being cooperable with said predetermined feature to allow the coupling of said charging contact with the electrical terminal of said first battery and to prevent the coupling of said charging contact with said electrical terminal of said second battery.

23. The battery receptacle as recited in claim 22, wherein said inhibitor comprises a barrier of non-conductive material.

24. The battery receptacle as recited in claim 22, wherein said inhibitor has an opening therethrough sized and configured to accept said predetermined feature.

25. The battery receptacle as recited in claim 22, wherein said inhibitor has a first opening extending partially therethrough sized and configured to accept the electric terminal of said second battery and a second opening extending completely therethrough sized and configured to accept only the electric terminal of said first battery.

26. The battery receptacle as recited in claim 25, wherein said second opening is smaller in size than said first opening, said second opening being disposed proximate to the center of said first opening.

27. The battery receptacle as recited in claim 26, wherein said discharge contact is disposed on a first side of said inhibitor proximate to said first opening and said charging contact is disposed on an opposite side of said inhibitor proximate to said second opening.

28. The battery receptacle as recited in claim 27, wherein said discharge contact comprises a conductive plate having a cutout portion flanked by a pair of extending side arms and wherein said cutout portion substantially coaxially aligns with said first opening.

29. A battery receptacle for use with a plurality of first batteries each having a predetermined feature and a plurality of second batteries each lacking said predetermined feature, comprising:

a non-conductive support forming a plurality of battery accepting slots each capable of accepting therein one of said plurality of first batteries or one of said plurality of second batteries, at least one of said plurality of battery accepting slots having a discharge contact mounted to said non-conductive support, said discharge contact being adapted to electrically couple to an electrical terminal of either one of said plurality of first batteries or one of said plurality of second batteries which may be disposed within said one of said plurality of battery accepting slots;

a charging contact mounted to said non-conductive support; and

an inhibitor associated with said charging contact and cooperable with said predetermined feature to permit coupling of said charging contact with said electrical terminal of said one of said plurality of first batteries and to prevent coupling of said charging contact with said electrical terminal of said one of said plurality of second batteries.

30. The battery receptacle as recited in claim 29, wherein said inhibitor is disposed between said discharge contact and said charging contact.

31. The battery receptacle as recited in claim 29, wherein said inhibitor has an opening therethrough which is sized and configured to accept said predetermined feature.

32. The battery receptacle as recited in claim 29, wherein said inhibitor has a first opening extending partially therethrough sized and configured to accept the electric terminal of said one of said plurality of second batteries and a second opening extending completely therethrough sized and configured to accept the electric terminal of said one of said plurality of first batteries.

33. The battery receptacle as recited in claim 32, wherein said second opening is smaller in size than said first opening and said second opening is disposed proximate to the center of said first opening.

34. The battery receptacle as recited in claim 33, wherein said discharge contact is disposed on a first side of said inhibitor proximate to said first opening and said charging contact is disposed on an opposite side of said inhibitor proximate to said second opening.

35. The battery receptacle as recited in claim 34, wherein said discharge contact comprises a planar plate having a cutout portion between a pair of extending side arms and wherein said cutout portion substantially, coaxially aligns with said first opening.

36. The battery receptacle as recited in claim 35, wherein said discharge contact further comprises a spring member cooperable with an opening in said non-conductive support for use in mounting said discharge contact to said non-conductive support.

37. The battery receptacle as recited in claim 36, further comprising a non-conductive wall associated with said non-conductive support and wherein said charging contact is mounted to said non-conductive wall.

38. The combination with a battery having a negative terminal at one end and a positive terminal at its opposed end, said positive terminal including a nubbin;

of

a battery receptacle having a negative terminal contact couplable with said negative terminal, first and second positive terminal contacts couplable with said positive terminal, and an inhibitor disposed between said first and second positive terminal contacts, said inhibitor being configured to prevent the coupling of said second positive terminal contact and said positive terminal unless said nubbin has a predetermined configuration.

39. The combination as recited in claim 38, wherein said predetermined configuration comprises a nubbin of predetermined diameter.

40. The combination as recited in claim 39, wherein said inhibitor comprises a non-conductive wall having an opening extending partially therethrough sized and configured to accept passage of a nubbin having said predetermined diameter.

41. The combination as recited in claim 40, wherein said inhibitor is disposed between said first and second positive terminal contacts.

42. The combination as recited in claim 41, wherein said negative terminal contact is adapted to urge said battery into engagement with said first positive terminal contact and said inhibitor.

43. The combination as recited in claim 42, wherein said first positive terminal contact is adapted to cooperate with said negative terminal contact to maintain said battery therebetween.