Terminal and battery charging control device and method thereof

Patent metadata

Field	Value
Publication number	US-11522373-B2
Application number	US-201815900281-A
Country	US
Kind code	B2
Filing date	Feb 20, 2018
Priority date	Jan 28, 2014
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

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.

First claim

What is claimed is:

1. A battery charging control device, coupled between a communication interface of a terminal and a battery of the terminal, the battery charging control device comprising a battery connector coupled to the battery, the battery charging control device further comprising a main control circuit coupled between the battery connector and the communication interface, and a quick charging switch circuit coupled between the battery connector and the communication interface,
wherein the quick charging switch circuit is configured to charge the battery in a first charging mode;
the main control circuit comprises two communication terminals coupled with the communication interface, and the main control circuit is configured to: obtain a value of a charging voltage and/or a value of a charging current for the battery through the communication interface by performing a data communication with an external power providing device through the two communication terminals, 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.

2. The battery charging control device according to claim 1 ,
wherein the main control circuit is configured to:
switch the quick charging switch circuit on when the battery is charged in the first charging mode, such that a direct current is introduced from the communication interface through both a first charging path of the first charging mode and a second charging path of a second charging mode to charge the battery, and
switch the quick charging switch circuit off when the battery is charged in the second charging mode, such that a direct current is introduced from the communication interface through the second charging path of the second charging mode to charge the battery; 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 1 , 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 switch the quick charging switch circuit off when the voltage value of the battery is greater than a quick charging voltage threshold.

4. The battery charging control device according to claim 1 , wherein the main control circuit is configured to switch the quick charging switch circuit 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.

5. The battery charging control device according to claim 1 , 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.

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

7. A battery charging control method, applied to a terminal comprising a communication interface and a main control circuit having two communication terminals coupled with the communication interface, comprising:
obtaining, by the main control circuit, a value of a charging voltage and/or a value of a charging current for a battery of the terminal through the communication interface of the terminal by performing a data communication with an external power providing device through the two communication terminals, wherein the two communication terminals are coupled with a communication interface;
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.

8. The battery charging control method according to claim 7 , further comprising:
switching the quick charging switch circuit of the terminal on when the battery is charged in the first charging mode, such that a direct current is introduced from the communication interface through both a first charging path of the first charging mode and a second charging path of a second charging mode to charge the battery; and
switching the quick charging switch circuit off when the battery is charged in the second charging mode, such that a direct current is introduced from the communication interface through the second charging path of the second charging mode to charge the battery; wherein a charging speed of the first charging mode is greater than that of the second charging mode.

9. The battery charging control method according to claim 7 , further comprising:
obtaining a voltage value of the battery when the battery is charged in the first charging mode; and
switching the quick charging switch circuit off when the voltage value of the battery is greater than a quick charging voltage threshold.

10. The battery charging control method according to claim 7 , further comprising:
switching the quick charging switch circuit 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.

11. A terminal, comprising:
a battery;
a communication interface, comprising a power wire;
a battery connector, coupled to the battery;
a main control circuit, coupled between the battery connector and the communication interface;
a quick charging switch circuit, coupled between the battery connector and the communication interface and configured to charge the battery in a first charging mode;
wherein the main control circuit comprises two communication terminals coupled with the communication interface, and the main control circuit is configured to acquire a value of a charging voltage and/or a value of a charging current for the battery through the communication interface by performing a data communication with an external power providing device through the two communication terminals;
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.

12. The terminal according to claim 11 ,
wherein the main control circuit is configured to switch the quick charging switch circuit on when the battery is charged in a first charging mode, such that a direct current is introduced from the communication interface through both a first charging path of the first charging mode and a second charging path of a second charging mode to charge the battery, and switch the quick charging switch circuit off when the battery is charged in the second charging mode, such that a direct current is introduced from the communication interface through the second charging path of the second charging mode to charge the battery; wherein a charging speed of the first charging mode is greater than that of the second charging mode.

13. The terminal according to claim 11

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zhang Jialiang
• Wu Kewei
• Zhang Jun
• Liao Fuchun
• Hu Yuanxiang

Classifications

• H02J7/62

  against overcurrent · CPC title

• H02J7/61

  against overcharge · CPC title

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J7/663

  using battery or load disconnect circuits (H02J9/002 takes precedence) · CPC title

• H02J7/64 Primary

  against overvoltage · CPC title