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

• US 10,969,437 B2
• Filed: 08/25/2017
• Issued: 04/06/2021
• Est. Priority Date: 08/25/2017
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Inventors: Chen, Wei, Zhang, Jialiang, Chen, Shebiao
• Primary Examiner(s): Astacio-Oquendo, Giovanni
• Application Number:
  US16/461,744
• Publication Number:
  US 20190317154A1
• Time in Patent Office: 1,320 Days
• Field of Search: 324433, 324426, 324425
• CPC Class Codes: G01R 31/36 Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/371 with remote indication, e.g. on external chargers
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: G08B 21/24 Reminder alarms, e.g. anti-loss alarms

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.

Claims

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 third resistor;

a first comparator, wherein a negative input end of the first comparator is coupled to a second end of the fourth resistor, and a positive input end of the first comparator is coupled to a second end of the fifth resistor;

a sixth resistor, coupled between the negative input end and an output end of the first comparator;

a second comparator, wherein a negative input end of the second comparator is coupled to a reference voltage, a positive input end of the second comparator is coupled to the output end of the first comparator, and an output end of the second comparator is coupled to the controller.

19. An electronic device, comprising a housing, a battery, a processor, a memory, and a circuit board, wherein:

the circuit board is enclosed by the housing;

the processor and the memory are positioned on the circuit board;

the battery is configured to provide power for the electronic device;

the memory is configured to store executable program codes; and

the processor is configured to run a program corresponding to the executable program codes by reading the executable program codes stored in the memory, to perform following operations;

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.

20. The electronic device according to claim 19, further comprising:

a display, configured to display a reminder message for indicating the abnormality of the battery, when the abnormality occurs currently in the battery.