Electronic device, and battery abnormality monitoring method and monitoring system thereof

Patent metadata

Field	Value
Publication number	US-10969437-B2
Application number	US-201716461744-A
Country	US
Kind code	B2
Filing date	Aug 25, 2017
Priority date	Aug 25, 2017
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

The present disclosure provides an electronic device and a battery abnormality monitoring method and monitoring system. The battery abnormality monitoring method includes: obtaining a battery voltage of a battery of the electronic device in real time and obtaining a consumption current of the battery in real time, when the electronic device is on; determining whether a voltage jump occurs in the battery of the electronic device according to the battery voltage obtained in real time; further determining whether an abrupt change occurs in the consumption current of the battery when the voltage jump occurs in the battery; and determining that an abnormality occurs currently in the battery when the abrupt change does not occur in the consumption current of the battery.

First claim

What is claimed is:

1. A battery abnormality monitoring method, applicable to an electronic device, comprising:
obtaining a battery voltage of a battery of the electronic device in real time and obtaining a consumption current of the battery in real time, when the electronic device is in an on state;
determining whether a voltage jump occurs in the battery of the electronic device according to the battery voltage obtained in real time;
further determining whether an abrupt change occurs in the consumption current of the battery when the voltage jump occurs in the battery; and
determining that an abnormality occurs currently in the battery when the abrupt change does not occur in the consumption current of the battery.

2. The battery abnormality monitoring method according to claim 1 , further comprising:
controlling the electronic device to issue a reminder message for indicating the abnormality of the battery, when the abnormality occurs currently in the battery.

3. The battery abnormality monitoring method according to claim 1 , wherein, determining whether the voltage jump occurs in the battery based on the battery voltage obtained in real time comprises:
determining whether an instantaneous voltage drop occurs in the battery based on the battery voltage obtained in real time; and
determining that the voltage jump occurs in the battery when the instantaneous voltage drop occurs in the battery.

4. The battery abnormality monitoring method according to claim 3 , wherein an occurrence of the instantaneous voltage drop is determined when a magnitude of a voltage drop of the battery voltage within a first preset time period is greater than or equal to a preset value.

5. The battery abnormality monitoring method according to claim 4 , wherein the preset value is greater than or equal to 10 mV.

6. The battery abnormality monitoring method according to claim 1 , wherein determining whether the abrupt change occurs in the consumption current of the battery comprises:
determining whether a magnitude of change of the consumption current within a second preset time period is greater than or equal to a preset current threshold;
if the magnitude of change of the consumption current within the second preset time period is greater than or equal to the preset current threshold, determining that the abrupt change occurs in the consumption current of the battery; and
if the magnitude of change of the consumption current within the second preset time period is less than the preset current threshold, determining that the abrupt change does not occur in the consumption current of the battery.

7. The battery abnormality monitoring method according to claim 6 , wherein the preset current threshold is greater than or equal to 50 mA.

8. The battery abnormality monitoring method according to claim 1 , further comprising:
when the abnormality occurs currently in the battery, determining a fault grade based on a situation of the voltage jump of the battery, and limiting a corresponding function of the electronic device according to the fault grade.

9. The battery abnormality monitoring method according to claim 1 , further comprising:
when the abnormality occurs currently in the battery, prohibiting the electronic device from fast charging.

10. A battery abnormality monitoring system, applicable to an electronic device, comprising:
a differential amplification circuit, configured to obtain a battery voltage of a battery of the electronic device in real time when the electronic device is in an on state;
a current detection circuit, configured to obtain a consumption current of the battery in real time when the electronic device is in the on state; and
a controller, configured to determine whether a voltage jump occurs in the battery based on the battery voltage obtained in real time, to further determine whether an abrupt change occurs in the consumption current of the battery when the voltage jump occurs in the battery, and to determine that an abnormality occurs currently in the battery when the voltage jump occurs in the battery and the abrupt change does not occur in the consumption current of the battery.

11. The battery abnormality monitoring system according to claim 10 , wherein, the controller is further configured to control the electronic device to issue a reminder message for indicating the abnormality of the battery, when the abnormality occurs currently in the battery.

12. The battery abnormality monitoring system according to claim 10 , wherein, the controller is configured to:
determine whether an instantaneous voltage drop occurs in the battery based on the battery voltage obtained in real time; and
determine that the voltage jump occurs in the battery when the instantaneous voltage drop occurs in the battery.

13. The battery abnormality monitoring system according to claim 12 , wherein the controller is configured to determine that the instantaneous voltage drop occurs in the battery when a magnitude of a voltage drop of the battery voltage within a first preset time period is greater than or equal to a preset value.

14. The battery abnormality monitoring system according to claim 10 , wherein the controller is configured to:
determine whether a magnitude of change of the consumption current within a second preset time period is greater than or equal to a preset current threshold;
if the magnitude of change of the consumption current within the second preset time period is greater than or equal to the preset current threshold, determine that the abrupt change occurs in the consumption current of the battery; and
if the magnitude of change of the consumption current within the second preset time period is less than the preset current threshold, determine that the abrupt change does not occur in the consumption current of the battery.

15. The battery abnormality monitoring system according to claim 14 , wherein the preset current threshold is greater than or equal to 50 mA.

16. The battery abnormality monitoring system according to claim 10 , wherein when the abnormality occurs currently in the battery, the controller is further configured to determine a fault grade based on a situation of the voltage jump of the battery, and to limit a corresponding function of the electronic device according to the fault grade.

17. The battery abnormality monitoring system according to claim 10 , wherein the differential detection circuit comprises:
a first resistor, wherein a first end of the first resistor is grounded;
a second resistor, wherein a first end of the second resistor is coupled to a cathode of the battery;
a capacitor coupled to the first resistor in parallel; and
a differential amplifier, wherein a negative input end of the differential amplifier is coupled to a second end of the first resistor and a second end of the second resistor respectively, a positive input end of the differential amplifier is coupled to the cathode of the battery, and an output end of the differential amplifier is coupled to the controller.

18. The battery abnormality monitoring system according to claim 10 , wherein the current detection circuit comprises:
a third resistor, wherein a first end of the third resistor is coupled to an anode of the battery, and a second end of the third resistor is coupled to a cathode of the battery via a system load;
a fourth resistor, wherein a first end of the fourth resistor is coupled to the first end of the third resistor;
a fifth resistor, wherein a first end of the fifth resistor is coupled to the second end of the thir

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Chen Wei
• Zhang Jialiang
• Chen Shebiao

Classifications

• G01R31/3842 Primary

  combining voltage and current measurements · CPC title

• G01R31/371

  with remote indication, e.g. on external chargers · CPC title

• G01R31/367

  Software therefor, e.g. for battery testing using modelling or look-up tables · CPC title

• G08B21/24

  Reminder alarms, e.g. anti-loss alarms · CPC title

• G01R31/36

  Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] · CPC title