Method and apparatus for manually selecting battery charging process

• US 5,896,024 A
• Filed: 03/24/1998
• Issued: 04/20/1999
• Est. Priority Date: 03/24/1998
• Status: Expired due to Fees

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Bradus, Robert, Embrey, Janet
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US09/047,171
• Time in Patent Office: 392 Days
• Field of Search: 320/125, 320/132, 320/134, 320/150, 320/160, 320/161, 320/162, 320/164, 320/FOR 118, 320/FOR 119, 320/FOR 121, 320/FOR 129, 320/FOR 138
• US Class Current: 320/125
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A method for charging a rechargeable battery pack includes providing a charger having first and second charging processes, and manually selecting one of the first and second charging processes. The charging method may include a step for indicating status or end of the selected one charging process. The first charging process may include the steps of providing a fast charging current, indicating end of the fast charging current and providing an equalization current. The second charging process may include the steps of providing a fast charging current, subsequently providing an equalization current and indicating end of equalization current. The second charging process may also include a temperature checking step. Further disclosed is a battery charging apparatus including a charger for charging a battery and having first and second charging processes, and a switch connected to the charger for manually selecting one of the first and second charging processes. The charger may include a microprocessor. Further, the apparatus may include a display output and/or sound output connected to the charger. The display output and/or sound output may indicate status or end of the selected one charging process. The display output may comprise a light bulb, a light emitting diode and/or a liquid crystal display. The sound output may comprise a speaker and/or a piezo-electric device.

Claims

1. A battery charging apparatus comprising:

a charger for charging a battery and having a first and second charging processes; and

a switch connected to the charger for manually selecting between the first and second charging processes,

wherein the first charging process is a fast charging process and the second charging process is an equalization process.

2. The apparatus of claim 1, wherein the charger comprises a microprocessor.

3. The apparatus of claim 1, further comprising a display output connected to the charger.

4. The apparatus of claim 3, wherein the display output comprises at least one of the group comprising a light emitting diode, a liquid crystal display and a light bulb.

5. The apparatus of claim 3, wherein the display output indicates status of a selected charging process.

6. The apparatus of claim 3, wherein the display output indicates end of a selected charging process.

7. The apparatus of claim 1, further comprising a sound output connected to the charger.

8. The apparatus of claim 7, wherein the sound output comprises at least one of the group comprising a speaker and a piezo-electric member.

9. The apparatus of claim 7, wherein the display output indicates status of a selected charging process.

10. The apparatus of claim 7, wherein the display output indicates end of a selected charging process.

11. The apparatus of claim 1, wherein the first charging process comprises providing a fast charging current to the battery, indicating end of fast charging current and providing an equalization current to the battery.

12. The apparatus of claim 1, wherein the second charging process comprises providing a fast charging current to the battery, providing an equalization current to the battery and indicating end of the equalization current.

13. The apparatus of claim 1, wherein the second charging process comprises providing an equalization current to the battery and indicating end of the equalization current.

14. The apparatus of claim 1, wherein the first charging process comprises sensing battery temperature.

15. The apparatus of claim 1, wherein the second charging process comprises sensing battery temperature.

16. The apparatus of claim 1, wherein the second charging process equalizes the battery without substantially discharging the battery.

17. A method for charging a battery comprising:

providing a charger having first and second charging processes; and

manually switching the charger between first and second charging processes,

wherein the first charging process is a fast charging process and the second charging process is an equalization process.

18. The charging method of claim 17, further comprising indicating status of a selected charging process.

19. The charging method of claim 17, further comprising indicating end of a selected charging process.

20. The charging method of claim 17, wherein the first charging process comprises providing a fast charging current, indicating end of the fast charging current and providing an equalization current.

21. The charging method of claim 20, wherein the first charging process comprises sensing battery temperature.

22. The charging method of claim 17, wherein the second charging process comprises providing a fast charging current to the battery, providing an equalization current to the battery and indicating end of the equalization current.

23. The charging method of claim 22, wherein the second charging process comprises sensing battery temperature.

24. The charging method of claim 17, wherein the second charging process comprises providing an equalization current to the battery and indicating end of the equalization current.

25. The charging method of claim 17, wherein the second charging process equalizes the battery without substantially discharging the battery.

26. A battery charging apparatus comprising:

a charger for charging a battery and having a fast charging process and a refresh process; and

a switch connected to the charger for manually selecting between the fast charging and refresh processes;

wherein the fast charging process comprises providing a fast charging current to the battery, indicating end of fast charging current and providing an equalization current to the battery, and the refresh process comprises providing an equalization current to the battery and indicating end of the equalization current.

27. The apparatus of claim 26, wherein the charger comprises a microprocessor.

28. The apparatus of claim 26, further comprising a display output connected to the charger.

29. The apparatus of claim 28, wherein the display output comprises at least one of the group comprising a light emitting diode, a liquid crystal display and a light bulb.

30. The apparatus of claim 28, wherein the display output indicates end of fast charging current or equalization current.

31. The apparatus of claim 26, wherein the refresh process comprises sensing battery temperature.

32. The apparatus of claim 26, wherein the refresh process comprises suspending current sent to the battery until a predetermined period of time has elapsed.

33. The apparatus of claim 26, wherein the refresh process comprises providing a fast charging current to the battery.

34. The apparatus of claim 26, wherein the refresh process equalizes the battery without substantially discharging the battery.

35. A method for charging a battery comprising:

providing a charger having fast charging and refresh processes; and

manually switching the charger between the fast charging and refresh processes;

wherein the fast charging process comprises providing a fast charging current to the battery, indicating end of fast charging current and providing an equalization current to the battery, and the refresh process comprises providing an equalization current to the battery and indicating end of the equalization current.

36. The charging method of claim 35, wherein the refresh process comprises sensing battery temperature.

37. The charging process of claim 35, wherein the refresh process comprises suspending current sent to the battery until a predetermined period of time has elapsed.

38. The charging process of claim 35, wherein the refresh process comprises providing a fast charging current to the battery.