INTELLIGENT BATTERY CHARGING RATE MANAGEMENT

• US 20090243549A1
• Filed: 03/31/2008
• Published: 10/01/2009
• Est. Priority Date: 03/31/2008
• Status: Abandoned Application

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Matsumura, Naoki, Otani, Nobuhiro, Hamaji, Kiyohiro
• Application Number:
  US12/059,967
• Publication Number:
  US 20090243549A1
• Time in Patent Office: Days
• US Class Current: 320/155
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A method and system for intelligent battery charging rate management. Some embodiments of a method include determining a time period available for charging a rechargeable battery from an initial charge state to a final charge state. A second time period is determined, the second time period being an amount of time required to charge the battery from the initial charge state to the final charge state using a first charging process, with the first charging process including a first current value. If the first time period is greater than the second time period, then a reduced second current value is determined that is sufficient to charge the battery to the final charge state, and the battery is charged with a current of the second current value.

Claims

1. A method comprising:

determining a first time period, the first time period being an amount of time available for charging a rechargeable battery from an initial charge state to a final charge state;

determining a second time period, the second time period being an amount of time to charge the battery from the initial charge state to the final charge state using a charging process, the charging process including a first current value;

if the first time period is greater than the second time period, determining a second current value that is sufficient to charge the battery to the final charge state during the first time period, the second current value being less than the first current value; and

charging the battery, charging the battery including charging with a current of the second current value.

2. The method of claim 1, wherein determining the first time period includes determining a start time for charging and determining an ending time for charging.

3. The method of claim 1, wherein determining the second time period includes retrieving charging characteristic information for the battery.

4. The method of claim 1, wherein the battery is a lithium ion battery.

5. The method of claim 1, wherein the charging process is a CC-CV (constant current-constant voltage) charging process.

6. The method of claim 5, wherein the first current value is a predetermined fraction of the amp-hour value of the battery.

7. The method of claim 1, wherein the battery is contained in an electronic device.

8. A battery charging rate management system comprising:

a first logic to determine a first time period available for charging a rechargeable battery to a final charge state, and to determine a second time period to charge the battery from an initial charge state to the final charge state in a charging process at a first current value, and

a second logic to determine, if the first time period is greater than the second time period, a second current value that is sufficient for charging the rechargeable battery from the initial charge state to the final charge state during the first time period.

9. The system of claim 8, further comprising data regarding charging characteristics of the rechargeable battery, the second logic to base the determination of the second current value at least in part on the data regarding charging characteristics.

10. The system of claim 8, wherein the final charge state is a full charge for the battery.

11. The system of claim 8, further comprising a user interface, wherein the first logic is to determine the first time period by comparing a time to start charging from a time to complete charging, and wherein a user is to input the time to complete charging through the user interface.

12. The system of claim 8, wherein the charging process is a CC-CV (constant current-constant voltage) charging process.

13. The system of claim 8, wherein the battery is a battery pack containing a plurality of battery cells.

14. The system of claim 8, wherein the system is a part of a mobile computing device.

15. The system of claim 8, further comprising a charger to provide power for charging the battery.