System and method for determining battery condition and telecommunications equipment incorporating the same

• US 6,124,701 A
• Filed: 06/22/1999
• Issued: 09/26/2000
• Est. Priority Date: 06/22/1999
• Status: Expired due to Term

• Current Assignee: ABB Power Electronics Inc. (ABB Ltd.)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Mooney, Philip D., McDowell, Richard L., Popa, James C.
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US09/338,144
• Time in Patent Office: 462 Days
• Field of Search: 320/106, 320/110, 320/132, 320/133, 320/148, 320/151, 320/155, 320/156, 320/161, 320/DIG. 21
• US Class Current: 320/132
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: G01R 31/386 using test-loads

Abstract

A system for, and method of, determining a condition of a battery and telecommunications equipment incorporating the system or the method. In one embodiment, the system includes: (1) a load controller, having a memory, that couples a load of a known magnitude to the battery and (2) a voltage monitor, coupled to the load controller, that measures voltages of the battery at first and second times and provides the voltages to the load controller, the load controller comparing a slope defined by the voltages to a model stored in the memory and regarding the battery to determine a condition thereof.

Claims

1. A system for determining a condition of a battery, comprising:

a load controller, having a memory and model adaptation circuitry, that couples a load of a known magnitude to said battery, said model adaptation circuitry adapting a model of said battery by monitoring said battery over time; and

a voltage monitor, coupled to said load controller, that measures voltages of said battery at first and second times and provides said voltages to said load controller, said load controller comparing a slope defined by said voltages to said model stored in said memory and regarding said battery to determine a condition thereof.

2. The system as recited in claim 1 wherein a fixed period of time separates said first and second times.

3. The system as recited in claim 1 wherein said model contains voltage curves for said battery.

4. The system as recited in claim 1 wherein said first and second voltages define a line having a given negative slope.

5. The system as recited in claim 1 wherein said load controller compares both absolute and relative values of said voltages to said model to determine said condition of said battery.

6. The system as recited in claim 1 wherein said load is a test load.

7. A method of determining a condition of a battery, comprising:

coupling a load of a known magnitude to said battery;

measuring voltages of said battery at first and second times;

comparing a slope defined by said voltages to a model regarding said battery to determine a condition thereof; and

adapting said model by monitoring said battery over time.

8. The method as recited in claim 7 wherein a fixed period of time separates said first and second times.

9. The method as recited in claim 7 wherein said model contains voltage curves for said battery.

10. The method as recited in claim 7 wherein said first and second voltages define a line having a given negative slope.

11. The method as recited in claim 7 wherein said load controller compares both absolute and relative values of said voltages to said model to determine said condition of said battery.

12. The method as recited in claim 7 wherein said load is a test load.

13. Telecommunications equipment, comprising:

a wireless transceiver;

a battery, coupled to said transceiver;

a battery charger, couplable to said battery and including a system for determining a condition of said battery, including;

a load controller, having a memory and model adaptation circuitry, that couples a load of a known magnitude to said battery, said model adaptation circuitry adapting a model of said battery by monitoring said battery over time, and

a voltage monitor, coupled to said load controller, that measures voltages of said battery at first and second times and provides said voltages to said load controller, said load controller comparing a slope defined by said voltages to said model stored in said memory and regarding said battery to determine a condition thereof.

14. The equipment as recited in claim 13 wherein a fixed period of time separates said first and second times.

15. The equipment as recited in claim 13 wherein said model contains voltage curves for said battery.

16. The equipment as recited in claim 13 wherein said first and second voltage s define a line having a given negative slope.

17. The equipment as recited in claim 13 wherein said load controller compares both absolute and relative values of said voltages to said model to determine said condition of said battery.

18. The equipment as recited in claim 13 wherein said load is a test load.