DIAGNOSTIC USE OF A PLURALITY OF ELECTRICAL BATTERY PARAMETERS

• US 20130069661A1
• Filed: 09/16/2011
• Published: 03/21/2013
• Est. Priority Date: 09/16/2011
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Rich, David Gerard, Sutarwala, Taha Shabbir Husain, Sengupta, Surajit
• Granted Patent: US 8,829,911 B2
• Time in Patent Office: Days
• US Class Current: 324/433
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: H01M 10/42 Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells H01M10/60 takes precedence
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

In at least one embodiment, a power management module measures different observable quantities of a battery, such as terminal voltage or current, and measures a voltage response of the battery based upon the measurements. The measured voltage response of the battery is compared to a plurality of reference voltage responses, which may be determined for authentic batteries, for example. If the measured voltage response corresponds to each of the reference voltage responses, the battery is authenticated for use with an electronic device. If necessary, additional voltage responses may be measured and compared against corresponding reference voltage responses until the battery is authenticated by a sufficient number of corresponding responses. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured voltage response of the battery.

Claims

1. An electronic device comprising:

an interface for receiving a battery comprising a battery module for supplying power to the electronic device; and

a power management module coupled to the battery and configured to;

measure a voltage response of the battery due to current flow in the battery module;

compare the measured voltage response of the battery to each of a plurality of reference voltage responses; and

if the measured voltage response corresponds to each of the plurality of reference voltage responses, authenticate the battery for use with the electronic device.

2. The device of claim 1, further comprising the battery.

3. The device of claim 1, wherein the device comprises a mobile communication device.

4. The device of claim 1, wherein each of the plurality of reference voltage responses comprises a reference voltage response of an authentic battery.

5. The device of claim 4, wherein each of the reference voltage responses corresponding to a different relative condition of the authentic battery, and wherein the power management module is further configured to determine a relative condition of the battery by comparing the measured voltage response with each of the plurality of reference voltage responses.

6. The device of claim 5, wherein the relative condition of the battery comprises at least one of an age or state of health of the battery.

7. The device of claim 1, wherein the power management module is configured to:

measure a plurality of voltage responses of the battery due to current flow in the battery module;

compare each of the measured plurality of voltage responses of the battery with a corresponding one of the plurality of reference voltage responses; and

if a minimum number of the measured plurality of voltage responses corresponds to a threshold number of the plurality of reference voltage responses, authenticate the battery for use with the electronic device.

8. The device of claim 1, wherein the power management module is configured to measure the voltage response of the battery based on a plurality of AC voltages measured across the battery module, each measured AC voltage measured for a corresponding AC excitation current of a different frequency supplied to the battery module.

9. The device of claim 1, wherein the power management module is configured to measure the voltage response of the battery based on a voltage slump measured across the battery module during pulsed discharging of the battery module.

10. The device of claim 1, wherein the power management module is configured to measure the voltage response of the battery based on a charge differential relation of the battery module, the charge differential relation representing a rate of change of a charge capacity of the battery module with respect to a terminal voltage of the battery module.

11. The device of claim 1, wherein the power management module is configured to measure the voltage response of the battery based on a charge capacity relation of the battery module, the charge capacity relation representing stored charge in the battery module as a function of a terminal voltage of the battery module.

12. A method for authenticating a battery for use with an electronic device, the battery comprising a battery module for supplying power to the electronic device, the method comprising:

measuring a voltage response of the battery due to current flow in the battery module;

comparing the measured voltage response of the battery to each of a plurality of reference voltage responses; and

if the measured voltage response corresponds to each of the plurality of reference voltage responses, authenticating the battery for use with the electronic device.

13. The method of claim 12, wherein the device comprises a mobile communication device.

14. The method of claim 12, wherein each of the plurality of reference voltage responses comprises a reference voltage response of an authentic battery.

15. The method of claim 14, wherein each of the expected voltage responses corresponding to a different relative condition of the authentic battery, and wherein the method further comprises determining a relative condition of the battery by comparing the measured voltage response with each of the plurality of reference voltage responses.

16. The method of claim 15, wherein the relative condition of the battery comprises at least one of an age or state of health of the battery.

17. The method of claim 12, further comprising:

measuring a plurality of voltage responses of the battery due to current flow in the battery module;

comparing each of the measured plurality of voltage responses of the battery to a corresponding one of the plurality of reference voltage responses; and

if a minimum number of the measured plurality of voltage responses corresponds to a threshold number of the plurality of the reference voltage responses, authenticating the battery for use with the electronic device.

18. The method of claim 12, wherein the measuring the voltage response of the battery is based on a plurality of AC voltages measured across the battery module, each measured AC voltage measured for a corresponding AC excitation current of a different frequency supplied to the battery module.

19. The method of claim 12, wherein the measuring the voltage response of the battery is based on a voltage slump measured across the battery module during pulsed discharging of the battery module.

20. The method of claim 12, wherein the measuring the voltage response of the battery is based on a charge differential relation of the battery module, the charge differential relation representing a rate of change of a charge capacity of the battery module with respect to a terminal voltage of the battery module.

21. The method of claim 12, wherein the measuring the voltage response of the battery is based on a charge capacity relation of the battery module, the charge capacity relation representing stored charge in the battery module as a function of a terminal voltage of the battery module.

22. A power management module for an electronic device supplied with power from a battery comprising a battery module, the power management module comprising a processor and memory coupled to the processor storing instructions when executed for programming the processor, the instructions comprising:

measuring a voltage response of the battery due to current flow in the battery module;

comparing the measured voltage response of the battery to each of a plurality of reference voltage responses; and

if the measured voltage response corresponds to each of the plurality of reference voltage responses, authenticating the battery for use with the electronic device.