Method and apparatus for battery malfunction detection and notification thereof

• US 10,243,380 B2
• Filed: 09/02/2015
• Issued: 03/26/2019
• Est. Priority Date: 09/02/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jung, Kuchul, Yoon, Sunggeun
• Primary Examiner(s): Levin, Naum B
• Application Number:
  US14/843,800
• Publication Number:
  US 20160064980A1
• Time in Patent Office: 1,301 Days
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• CPC Class Codes: G01R 31/44 Testing lamps
• 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 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A method of managing the charging of a battery, and an electronic device adapted to the method are provided. The method of managing the charging of a battery installed to an electronic device includes: charging the battery; obtaining an internal resistance of the charging battery; determining whether the battery is functioning based on the internal resistance; and displaying, when the battery is malfunctioning, a message related to the danger while charging the battery.

Claims

1. A method of managing a battery installed in an electronic device, the method comprising:

obtaining an internal resistance of the battery, while the battery is charging;

determining, by a processor of the electronic device, a danger level of the battery by comparing the obtained internal resistance of the battery to a plurality of ranges while the battery is charging;

when the battery is within a first danger level, determining whether to reduce a charging current flowing to the battery while the battery is charging or reduce a predetermined full charge voltage setting of the battery to a lower level while the battery is charging; and

when the battery is within a second danger level, stopping the battery from charging,

wherein in response to determining to reduce the charging current, reducing the charging current flowing to the battery while the battery is charging, and

wherein in response to determining to reduce the predetermined full charge voltage setting, reducing the predetermined full charge voltage setting of the battery to a lower level.

2. The method of claim 1, further comprising:

when the battery is within a third danger level, determining whether the obtained internal resistance is within a predetermined resistance range for a functioning state, while the battery is charging; and

displaying a message when the obtained internal resistance is outside the predetermined resistance range for the functioning state.

3. The method of claim 1, further comprising when the battery is within a third danger level, turning the electronic device off and stopping the battery from charging.

4. The method of claim 1, wherein stopping the battery from charging comprises setting a present voltage of the battery to a predetermined voltage, while the battery is charged by a constant current.

5. The method of claim 4, wherein the predetermined voltage is a full charge voltage.

6. The method of claim 1, wherein reducing the predetermined full charge voltage setting, further comprising reducing the predetermined full charge voltage setting to a voltage between a present voltage of the predetermined full charge voltage setting.

7. The method of claim 1, wherein reducing the predetermined full charge voltage setting, further comprising setting a full charge voltage level of the battery that is less than the predetermined full charge voltage.

8. The method of claim 1, wherein determining the danger level of the battery comprises determining whether the internal resistance is within at least one of one of the plurality of ranges:

wherein the plurality of ranges include a first predetermined resistance range for a functioning state, a second predetermined resistance range indicating a low level of danger, or a third predetermined resistance range indicating a high level of danger; and

wherein the method further comprises;

responsive to determining that the internal resistance of the battery is within one of the predetermined resistance ranges, performing at least one of;

reducing a charging current flowing into the battery, setting the predetermined full charge voltage of the battery to a voltage less than the predetermined full charge voltage, or stopping the battery from charging when the voltage of the battery reaches predetermined the full charge voltage while the battery is charged with a constant current; and

responsive to determining that the internal resistance of the battery is within another predetermined resistance range, stopping the battery from charging.

9. The method of claim 1, further comprising when the battery is within a third danger level, outputting audible information through a speaker.

10. An electronic device comprising:

a battery;

an interface unit configured to receive a charging current from an external source;

a power management unit configured to charge the battery with the charging current;

a resistance obtaining unit configured to obtain an internal resistance of the battery while the battery is charging;

a display; and

at least one processor coupled to the battery, the interface unit, the power management unit, the resistance obtaining unit, wherein the at least one processor is configured to;

determine a danger level of the battery by comparing the obtained internal resistance of the battery to a plurality of ranges, while the battery is charging;

when the battery is within a first danger level, determining whether to reduce a charging current flowing to the battery while the battery is charging or reduce a predetermined full charge voltage setting of the battery to a lower level while the battery is charging; and

when the battery is within a second danger level, stopping the battery from charging,

wherein in response to determining to reduce the charging current, reducing the charging current flowing to the battery while the battery is charging, and

wherein in response to determining to reduce the predetermined full charge voltage setting, reducing the predetermined full charge voltage setting of the battery to a lower level.

11. The electronic device of claim 10, wherein the processor is further configured to:

when the battery is within a third danger level determine whether the internal resistance is within a predetermined resistance range for a functioning state, while the battery is charging; and

control the display to display a message, when the obtained internal resistance is outside the a predetermined resistance range for the functioning state.

12. The electronic device of claim 10, wherein the processor is further configured to when the battery is within a third danger level, turning the electronic device off and control the power management unit to stop the battery from charging.

13. The electronic device of claim 10, wherein to reduce the predetermined full charge voltage setting, the processor is further configured to control the power management unit to reduce the predetermined full charge voltage setting to a voltage between a present voltage of the predetermined full charge voltage setting.

14. The electronic device of claim 10, wherein:

to reduce the predetermined full charge voltage setting, the processor is further configured to set a full charge voltage level of the battery that is less than the predetermined full charge voltage; and

the processor is further configured to set a present voltage level of the battery to a predetermined voltage, while the battery is charged by a constant current.

15. The electronic device of claim 10, wherein the resistance obtaining unit is configured as an element of the power management unit.

16. The electronic device of claim 10, wherein the resistance obtaining unit is configured as an element of the processor.

17. A non-transitory computer-readable storage medium embodying a computer program, the computer program comprising program code that when executed by at least one processor causes the at least one processor to:

obtain an internal resistance of a battery, while the battery is charging in an electronic device;

determine a danger level of the battery by comparing the obtained internal resistance of the battery to a plurality of ranges, while the battery is charging;

when the battery is within a first danger level, determining whether to reduce a charging current flowing to the battery while the battery is charging or reduce a predetermined full charge voltage setting of the battery to a lower level while the battery is charging; and

when the battery is within a second danger level, stopping the battery from charging,

wherein in response to determining to reduce the charging current, reducing the charging current flowing to the battery while the battery is charging, and

wherein in response to determining to reduce the predetermined full charge voltage setting, reducing the predetermined full charge voltage setting of the battery to a lower level.

18. The non-transitory computer-readable storage medium of claim 17, wherein when the battery is within a third danger level, the non-transitory computer-readable storage medium further comprises program code that when executed by the at least one processor of the electronic device, causes the at least one processor to:

determine whether the obtained internal resistance is within a predetermined resistance range for a functioning state, while the battery is charging; and

display a message when the obtained internal resistance is outside the predetermined resistance range for the functioning state.

19. The non-transitory computer-readable storage medium of claim 17, further comprising program code that when executed by the at least one processor of the electronic device, causes the at least one processor to turn the electronic device off and stop the battery from charging when the battery is within a third danger level.

20. The non-transitory computer-readable storage medium of claim 19, wherein to stop the battery from charging, the non-transitory computer-readable storage medium further comprising program code that when executed by the at least one processor of the electronic device, causes the at least one processor to set a present voltage of the battery to a predetermined voltage, while the battery is charged by a constant current.