TERMINAL AND BATTERY CHARGING CONTROL DEVICE AND METHOD THEREOF

• US 20180175659A1
• Filed: 02/20/2018
• Published: 06/21/2018
• 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, LIAO, Fuchun, HU, Yuanxiang
• Granted Patent: US 11,522,373 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The present disclosure relates to the technical field of charging. A terminal and a battery charging control device and method are provided. The battery charging control device including a battery connector, a main control circuit and a quick charging switch circuit is adopted. During the regular charging or the quick charging, the main control circuit performs a data communication with the external power adapter via the communication interface, and obtains a charging voltage and a charging current for the battery; if the charging voltage is greater than a voltage threshold and/or the charging current is greater than a current threshold, the main control circuit sends a charging switch-off instruction, such that the controller controls the communication interface to switch off; if the charging voltage is less than or equal to the voltage threshold and the charging current is less than or equal to the current threshold, the main control circuit continues to obtain the charging voltage and the charging current.

Claims

1. A battery charging control device, comprising a battery connector coupled to a battery of a terminal, and a main control circuit coupled between the battery connector and a communication interface of the terminal,

wherein the main control circuit is configured to perform a data communication to acquire a charging voltage and/or a charging current for the battery, and to send a charging switch-off instruction to switch the communication interface off when the charging voltage is greater than a voltage threshold and/or the charging current is greater than a current threshold.

2. The battery charging control device according to claim 1, further comprising:

a quick charging switch circuit coupled between the battery connector and the communication interface;

wherein the main control circuit is configured to control the quick charging switch circuit to switch on when the battery is charged in a first charging mode, such that a direct current is introduced from the communication interface to charge the battery through the battery connector, and to control the quick charging switch circuit to switch off when the battery is charged in a second charging mode;

wherein a charging speed of the first charging mode is greater than that of the second charging mode.

3. The battery charging control device according to claim 2, wherein the main control circuit is configured to control the quick charging switch circuit to switch off in response to determining that the charging voltage for the battery is 0, when the battery is charged in the first charging mode.

4. The battery charging control device according to claim 2, wherein the main control circuit is configured to obtain a voltage value of the battery when the battery is charged in the first charging mode, and to control the quick charging switch circuit to switch off when the voltage value of the battery is greater than a quick charging voltage threshold.

5. The battery charging control device according to claim 2, wherein the main control circuit is configured to control the quick charging switch circuit to switch off in response to receiving a quick charging switch-off instruction indicating an abnormal battery temperature of the battery, when the battery is charged in the first charging mode.

6. The battery charging control device according to claim 2, wherein the main control circuit is configured to obtain an electric quantity of the battery and to feed the electric quantity to a controller of the terminal such that the electric quantity is displayed, when the battery is charged in the first charging mode.

7. The battery charging control device according to claim 1, wherein the main control circuit is configured to perform the data communication with an external power providing device;

and

the main control circuit is configured to send a charging parameter obtaining request to the external power providing device, and to obtain the charging voltage and the charging current for the battery according to charging voltage information and charging current information fed by the external power providing device.

8. The battery charging control device according to claim 1, wherein the external power providing device is an external power adapter.

9. A battery charging control method, applied to a terminal, comprising:

obtaining a charging voltage and/or a charging current for a battery of the terminal through a communication interface of the terminal; and

switching the communication interface off when the charging voltage is greater than a voltage threshold and/or the charging current is greater than a current threshold.

10. The battery charging control method according to claim 9, further comprising:

controlling a quick charging switch circuit of the terminal to switch on when the battery is charged in a first charging mode, such that a direct current is introduced from the communication interface to charge the battery; and

controlling the quick charging switch circuit to switch off when the battery is charged in a second charging mode;

wherein a charging speed of the first charging mode is greater than that of the second charging mode.

11. The battery charging control method according to claim 10, further comprising:

controlling the quick charging switch circuit to switch off in response to determining that the charging voltage for the battery is 0, when the battery is charged in the first charging mode.

12. The battery charging control method according to claim 10, further comprising:

obtaining a voltage value of the battery when the battery is charged in the first charging mode; and

controlling the quick charging switch circuit to switch off when the voltage value of the battery is greater than a quick charging voltage threshold.

13. The battery charging control method according to claim 10, further comprising:

controlling the quick charging switch circuit to switch off in response to receiving a quick charging switch-off instruction indicating an abnormal battery temperature of the battery, when the battery is charged in the first charging mode.

14. The battery charging control method according to claim 9, further comprising:

sending a charging parameter obtaining request to an external power providing device, when the communication interface is coupled to the external power providing device; and

obtaining the charging voltage and the charging current for the battery according to charging voltage information and charging current information fed by the external power providing device.

15. A terminal, comprising:

a battery;

a communication interface;

a battery connector, coupled to the battery;

a main control circuit, coupled between the battery connector and the communication interface;

wherein the main control circuit is configured to perform a data communication to acquire a charging voltage and/or a charging current for the battery, and to send a charging switch-off instruction to switch the communication interface off when the charging voltage is greater than a voltage threshold and/or the charging current is greater than a current threshold.

16. The terminal according to claim 15, further comprising:

a quick charging switch circuit coupled between the battery connector and the communication interface;

wherein the main control circuit is configured to control the quick charging switch circuit to switch on when the battery is charged in a first charging mode, such that a direct current is introduced from the communication interface to charge the battery through the battery connector, and to control the quick charging switch circuit to switch off when the battery is charged in a second charging mode;

wherein a charging speed of the first charging mode is greater than that of the second charging mode.

17. The terminal according to claim 16, wherein the main control circuit is configured to control the quick charging switch circuit to switch off in response to determining that the charging voltage for the battery is 0, when the battery is charged in the first charging mode.

18. The terminal according to claim 16, wherein the main control circuit is configured to acquire a voltage value of the battery when the battery is charged in the first charging mode, and to control the quick charging switch circuit to switch off when the voltage value of the battery is greater than a quick charging voltage threshold.

19. The terminal according to claim 16, wherein the main control circuit is configured to control the quick charging switch circuit to switch off in response to receiving a quick charging switch-off instruction indicating an abnormal battery temperature of the battery, when the battery is charged in the first charging mode.

20. The terminal according to claim 15, wherein the main control circuit is configured to perform the data communication with an external power providing device;

and

the main control circuit is configured to send a charging parameter obtaining request to the external power providing device, and to obtain the charging voltage and the charging current for the battery according to charging voltage information and charging current information fed by the external power providing device.