Charging mode switching circuit and method

Patent metadata

Field	Value
Publication number	US-10873198-B2
Application number	US-201815932311-A
Country	US
Kind code	B2
Filing date	Feb 16, 2018
Priority date	Jan 28, 2014
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

A circuit and method for switching a charging mode are provided. The circuit for switching a charging mode, is coupled to a cell and externally coupled to a quick-charging adapter, and includes: a switch circuit, configured to connect the charging terminal and the cell terminal if a connection instruction is received from the first controlled terminal, such that the quick-charging adapter charges the cell via the switch circuit; a switching assembly, configured to receive a switching instruction from the controlled terminal; a first controller, configured to: receive a charging instruction, receive a quick-charging instruction at the first data terminal via the data interface terminal, and send the connection instruction from the third controlling terminal if the charging instruction and the quick-charging instruction are received; and a second controller, configured to send the charging instruction to the first controller if an insertion of the quick-charging adapter is detected.

First claim

What is claimed is:

1. A circuit for switching a charging mode, coupled to a cell, being externally coupled to an adapter, and the circuit for switching a charging mode comprising:
a switching assembly;
a second controller, configured to send a charging instruction in response to detecting an insertion of the adapter via the switching assembly;
a first controller, configured to receive the charging instruction sent from the second controller and to receive a quick-charging instruction from the adapter via the switching assembly, and further configured to send a connection instruction in response to receiving the charging instruction and the quick-charging instruction; and
a switch circuit, configured to connect the adapter and the cell in response to receiving the connection instruction from the first controller, such that the adapter charges the cell via the switch circuit.

2. The circuit for switching a charging mode according to claim 1 , wherein, the second controller is further configured to:
send a first switching instruction specifying the first controller to the switching assembly in response to detecting the insertion of the adapter via the switching assembly, such that the first controller receives the quick-charging instruction through the switching assembly.

3. The circuit for switching a charging mode according to claim 1 , wherein,
the second controller is further configured to:
send a quick-charging detection instruction to the first controller in response to detecting the insertion of the adapter via the switching assembly; and

the first controller is further configured to:
send a first switching instruction specifying the first controller to the switching assembly in response to receiving the quick-charging detection instruction, such that the first controller receives the quick-charging instruction.

4. The circuit for switching a charging mode according to claim 1 , further comprising:
a cell connector;
wherein the first controller, is configured to receive a positive electrode contact signal, a negative electrode contact signal and an electric quantity signal from the cell connector, and to send the positive electrode contact signal, the negative electrode contact signal and the electric quantity signal to the second controller via the switching assembly, and is further configured to send a first disconnection instruction to the switch circuit in response to receiving a disconnection instruction from the second controller via the switching assembly.

5. The circuit for switching a charging mode according to claim 4 , wherein,
the second controller is further configured to receive the positive electrode contact signal, the negative electrode contact signal and the electric quantity signal sent by the first controller and is further configured to send the disconnection instruction to the first controller in response to determining that a positive electrode of the cell is not contacted well according to the positive electrode contact signal, that a negative electrode of the cell is not contacted well according to the negative electrode contact signal, or that a voltage of the cell exceeds a voltage threshold according to the electric quantity signal; and
the switch circuit is further configured to disconnect an electric connection between the adapter and the cell in response to receiving the first disconnection instruction, such that the adapter stops charging the cell via the switch circuit.

6. The circuit for switching a charging mode according to claim 1 , wherein,
the second controller is further configured to send a second switching instruction specifying the second controller to the switching assembly in response to not detecting the insertion of the adapter via the switching assembly.

7. The circuit for switching a charging mode according to claim 1 , wherein,
the first controller is further configured to send a second switching instruction specifying the second controller to the switching assembly in response to not detecting the insertion of the adapter via the switching assembly.

8. The circuit for switching a charging mode according to claim 1 , wherein, the switch circuit comprises: a second capacitor, a third capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first Schottky diode, a second Schottky diode, a third Schottky diode, a NPN triode and a switch component;
a first terminal of the second resistor, a second terminal of the switch component, a first terminal of the second capacitor and a second terminal of the second resistor are configured as the cell terminal, the charging terminal, the first controlled terminal and the second controlled terminal of the switch circuit respectively, a first terminal and a second terminal of the third resistor are coupled to the second terminal of the second resistor and a base of the NPN triode respectively, an anode and a cathode of the third Schottky diode are coupled to an emitter of the NPN triode and grounded respectively, an anode and a cathode of the first Schottky diode are coupled to the first terminal of the second resistor and a second terminal of the second capacitor respectively, an anode and a cathode of the second Schottky diode are coupled to the second terminal of the second capacitor and a first terminal of the fourth resistor respectively, a first terminal and a second terminal of the third capacitor are coupled to the cathode of the second Schottky diode and grounded respectively, a first terminal of the fifth resistor is coupled to the second terminal of the third capacitor and grounded, a second terminal of the fifth resistor is coupled to the second terminal of the fourth resistor, a collector of the NPN triode is coupled to a second terminal of the fourth resistor, and the second terminal and a controlled terminal of the switch component are coupled to the first terminal of the second resistor and the second terminal of the fourth resistor respectively.

9. The circuit for switching a charging mode according to claim 8 , wherein, the switch component comprises a third switch chip and a fourth switch chip;
a source pin of the third switch chip, a source pin of the fourth switch chip and a grid pin of the fourth switch chip are configured as the second terminal, the first terminal and the controlled terminal of the switch component respectively, and a grid pin and a drain pin of the third switch chip are coupled to the grid pin and a drain pin of the fourth switch chip respectively.

10. The circuit for switching a charging mode according to claim 1 , wherein,
the second controller is configured to execute an application of a mobile terminal.

11. A circuit for switching a charging mode, comprising:
a charging circuit;
a switch circuit;
a first controller, configured to control the switch circuit; and
a second controller, configured to recognize whether an inserted adapter is a first adapter or a second adapter, to control the switch circuit to switch on to charge a cell in response to determining that the inserted adapter is the first adapter, and to control the charging circuit to switch on to charge the cell in response to determining that the inserted adapter is the second adapter.

12. The circuit for switching a charging mode according to claim 11 , wherein the second controller is further configured to control the charging circuit to switch on in response to determining that the inserted adapter is the first adapter.

13. The circuit for switching a charging mode according to claim 11 , further comprising:
a switching assembly,
wherein the second controller is configured to send a charging instruction t

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zhang Jialiang
• Wu Kewei
• Zhou Huihuang
• Chen Biao

Classifications

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02J7/92 Primary

  with prioritisation of loads or sources · CPC title

• H02J7/02

  for charging batteries from AC mains by converters · CPC title

• H02J7/0071

  Electricity · mapped topic

• H02J7/0072

  Electricity · mapped topic