Charging control apparatus and method for electronic device

• US 10,193,368 B2
• Filed: 04/24/2018
• Issued: 01/29/2019
• Est. Priority Date: 01/28/2014
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Inventors: Zhang, Jialiang, Wu, Kewei, Zhang, Jun, Huang, Dashuai, Hu, Yuanxiang
• Primary Examiner(s): Berhanu, Samuel
• Application Number:
  US15/961,739
• Publication Number:
  US 20180241238A1
• Time in Patent Office: 280 Days
• Field of Search: 320128
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H02M 1/0009 Devices or circuits for detecting current in a converter
• CPC Class Codes: H02M 1/44 Circuits or arrangements for compensating for electromagnetic interference in converters or inverters

Abstract

A charging control apparatus and method for an electronic device are provided. During a process of charging, the power adapter first charges the battery with a constant-voltage direct current output, and then after the power adapter receives a quick-charging instruction, the power adapter adjusts an output voltage according to the voltage of the battery fed back by the charging control module, and if the output voltage meets a quick-charging voltage condition pre-set by the charging control module, the power adapter adjusts an output current and the output voltage respectively according to a preset quick-charging current value and a preset quick-charging voltage value for quick-charging the battery, and meanwhile the charging control module introduces direct current from the power adapter for charging the battery; during a process of quick-charging, the power adapter adjusts the output current in real time according to the output voltage thereof and the voltage of the battery.

Claims

1. A charging control apparatus for an electronic device, comprising a power adapter and a charging control module;

the power adapter being configured to charge a battery in the electronic device and to perform data communication with the charging control module via a communication interface of the power adapter;

the charging control module being built in the electronic device and being configured to detect a voltage of the battery;

each of the charging control module and the battery being coupled to the communication interface of the power adapter via a communication interface of the electronic device;

wherein, during a process of charging the battery, the power adapter first charges the battery with a constant-voltage direct current output, and then after the power adapter receives a quick-charging instruction sent by the charging control module, the power adapter adjusts an output voltage according to the voltage of the battery fed back by the charging control module, and when the output voltage meets a quick-charging voltage condition pre-set by the charging control module, the power adapter adjusts an output current and the output voltage respectively according to a preset quick-charging current value and a preset quick-charging voltage value for quick-charging the battery, and meanwhile the charging control module introduces direct current from the power adapter for charging the battery; and

during a process of quick-charging the battery, the power adapter adjusts the output current in real time according to the output voltage thereof and the voltage of the battery;

wherein the power adapter receiving the quick-charging instruction sent by the charging control module comprises that;

when the power adapter performs data communication with the charging control module, the power adapter sends a quick-charging inquiry instruction to the charging control module when the output current of the power adapter is within a conventional current range during a preset period of time;

the charging control module determines the voltage of the battery according to the quick-charging inquiry instruction; and

the charging control module feeds back the quick-charging instruction to the power adapter when the voltage of the battery reaches the quick-charging voltage value.

2. The apparatus according to claim 1, wherein

the power adapter is configured to send the output voltage to the charging control module;

the charging control module is configured to determine whether the output voltage meets the quick-charging voltage condition, and to send a first message to the power adapter when the output voltage meets the quick-charging voltage condition;

the power adapter is further configured to adjust the output current and the output voltage respectively according to the preset quick-charging current value and the preset quick-charging voltage value for quick-charging the battery based on the first message.

3. The apparatus according to claim 2, wherein the quick-charging voltage condition comprises a quick-charging voltage range.

4. The apparatus according to claim 2, wherein

the charging control module is configured to send a second message to the power adapter when the output voltage does not meet the quick-charging voltage condition, wherein the second message comprises a voltage deviation value;

the power adapter is further configured to adjust the output current based on the voltage deviation value.

5. The apparatus according to claim 1, wherein the power adapter is configured to charge the battery with the constant-voltage direct current by acts of:

detecting a voltage at the communication interface of the power adapter under a case that the direct current output of the power adapter is turned off;

determining whether the voltage at the communication interface is greater than a voltage threshold; and

outputting the constant-voltage direct current based on a preset conventional output voltage when the voltage at the communication interface is not greater than the voltage threshold.

6. The apparatus according to claim 5, wherein the power adapter is configured to return the detecting act when the voltage at the communication interface is greater than the voltage threshold.

7. The apparatus according to claim 1, wherein the power adapter is configured to adjust the output voltage according to the voltage of the battery fed back by the charging control module by acts of:

calculating a sum of the voltage of the battery and a preset voltage incremental value; and

adjusting the output voltage based on the sum.

8. The apparatus according to claim 1, wherein the power adapter is configured to adjust the output current in real time according to the output voltage and the voltage of the battery by acts of:

determining whether a difference between the output voltage and the voltage of the battery is greater than a voltage difference threshold; and

adjusting the output current based on the voltage of the battery when the difference between the output voltage and the voltage of the battery is not greater than the voltage difference threshold.

9. The apparatus according to claim 8, wherein the power adapter is further configured to turn off the direct current output when the difference between the output voltage and the voltage of the battery is greater than the voltage difference threshold.

10. The apparatus according to claim 1, wherein the constant-voltage direct current is less than 4 A.

11. The apparatus according to claim 1, wherein the output current for quick-charging the battery is no less than 4 A.

12. The apparatus according to claim 1, wherein the output voltage for quick-charging is in a range from about 3.4V to about 4.8V.

13. A charging control method for an electronic device, applied on the charging control apparatus according to claim 1 and comprising steps of:

during a process of charging a battery of the electronic device, firstly charging the battery by a power adapter with a constant-voltage direct-current output;

after receiving a quick-charging instruction sent by a charging control module, adjusting an output voltage by the power adapter according to a voltage of the battery fed back by the charging control module;

when the output voltage meets a quick-charging voltage condition pre-set, adjusting an output current and the output voltage respectively by the power adapter according to a preset quick-charging current value and a preset quick-charging voltage value for quick-charging the battery, and introducing a direct current from the power adapter simultaneously by the charging control module for charging the battery;

adjusting the output current in real time by the power adapter according to the output voltage of the power adapter and the voltage of the battery.

14. The method according to claim 13, wherein adjusting the output current and the output voltage respectively by the power adapter according to the preset quick-charging current value and the preset quick-charging voltage value for quick-charging the battery, comprises:

sending by the power adapter the output voltage to the charging control module;

receiving by the power adapter, a first message sent by the charging control module, wherein the first message is configured to indicate that the output voltage meets the quick-charging voltage condition;

adjusting the output current and the output voltage respectively by the power adapter according to the preset quick-charging current value and the preset quick-charging voltage value for quick-charging the battery based on the first message.

15. The method according to claim 14, further comprising:

receiving by the power adapter, a second message sent by the charging control module, wherein the second message is configured to indicate that the output voltage does not meet the quick-charging voltage condition and the second message comprises a voltage deviation value;

adjusting by the power adapter the output current based on the voltage deviation value.

16. The method according to claim 13, wherein charging by the power adapter the battery with the constant-voltage direct current comprises:

detecting by the power adapter a voltage at the communication interface of the power adapter under a case that the direct current output of the power adapter is turned off;

determining by the power adapter whether the voltage at the communication interface is greater than a voltage threshold; and

outputting by the power adapter the constant-voltage direct current based on a preset conventional output voltage when the voltage at the communication interface is not greater than the voltage threshold.

17. The method according to claim 16, further comprising:

returning by the power adapter the detecting act when the voltage at the communication interface is greater than the voltage threshold.

18. The method according to claim 13, wherein adjusting by the power adapter the output voltage according to the voltage of the battery fed back by the charging control module comprises:

calculating by the power adapter a sum of the voltage of the battery and a preset voltage incremental value; and

adjusting by the power adapter the output voltage based on the sum.

19. The method according to claim 13, wherein adjusting by the power adapter the output current in real time according to the output voltage and the voltage of the battery comprises:

determining by the power adapter whether a difference between the output voltage and the voltage of the battery is greater than a voltage difference threshold; and

adjusting by the power adapter the output current based on the voltage of the battery when the difference between the output voltage and the voltage of the battery is not greater than the voltage difference threshold.

20. The method according to claim 19, further comprising:

turning off by the power adapter the direct current output when the difference between the output voltage and the voltage of the battery is greater than the voltage difference threshold.