Charging device, charging method and terminal

Patent metadata

Field	Value
Publication number	US-10840712-B2
Application number	US-201616080657-A
Country	US
Kind code	B2
Filing date	Mar 31, 2016
Priority date	Feb 29, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A charging device, a charging method and a terminal, an output end of the main charging circuit and output ends of the at least two secondary charging circuits are connected to a battery of an electronic device, and the output end of the main charging circuit is used for supplying power to an internal chip of the electronic device, disconnecting a connection between the main charging circuit and the battery when a voltage of the output end of the main charging circuit reaches a voltage required by the internal chip, and supplying power for the battery through the output ends of the at least two secondary charging circuits. in this way, charging time is shortened and a purpose of fast charging a battery is achieved.

First claim

I claim:

1. A charging method, applied to a charging device, comprising: controlling a main charging circuit in the charging device to switch from charging a battery of an electronic device to supplying power to an internal chip of the electronic device after a charging phase of the charging device enters a constant current phase;
increasing voltages of output ends of all secondary charging circuits in the charging device, such that increased voltages of the output ends of the secondary charging circuits be greater than a voltage required by the internal chip;
controlling all of the secondary charging circuits to charge the battery using the increased voltages.

2. The charging method of claim 1 , wherein controlling the main charging circuit in the charging device to switch from charging the battery of the electronic device to supplying power to the internal chip of the electronic device after a charging phase of the charging device enters a constant current phase, comprises: controlling the main charging circuit to switch from charging a battery to supplying power to the internal chip of the electronic device when detecting a voltage of the output end of the main charging circuit reaching a voltage required by the internal chip of the electronic device after the charging phase of the charging device enters a constant current phase.

3. The charging method of claim 2 , upon detection of the voltage of the output end of the main charging circuit reaching the voltage required by the internal chip of the electronic device before controlling the main charging circuit to switch from charging the battery to supplying power to the internal chip of the electronic device, further comprising: turning on the main charging circuit and all of the secondary charging circuits in the charging device to charge the battery after the charging phase of the charging device enters the constant current phase.

4. The charging method of claim 1 , wherein controlling the main charging circuit in the charging device to switch from charging the battery to supplying power to the internal chip of the electronic device, comprises: turning off a switching circuit of the main charging circuit to cut off a path between the output end of the main charging circuit and the battery.

5. The charging method of claim 4 , further comprising: upon detection of an input end of the main charging circuit and input ends of all of the secondary charging circuits are not connected to an external power supply device, turning on the switch circuit to switch on the path between the output end of the main charging circuit and the battery.

6. The charging method of claim 1 , further comprising: under the condition that the charging device is not a fast charging device, turning on the main charging circuit and controlling the main charging circuit to charge the battery using a first charging current.

7. The charging method of claim 5 , further comprising: when the charging device is the fast charging device, and the charging phase of the charging device does not enter the constant current phase, turning on the main charging circuit, and controlling the main charging circuit to charge the battery using a second charging current, a value of the second charging current being greater than a value of the first charging current.

8. The charging method of claim 2 , wherein controlling the main charging circuit in the charging device to switch from charging the battery to supplying power to the internal chip of the electronic device, comprises: turning off a switching circuit of the main charging circuit to cut off a path between the output end of the main charging circuit and the battery.

9. The charging method of claim 2 , further comprising: under the condition that the charging device is not a fast charging device, turning on the main charging circuit and controlling the main charging circuit to charge the battery using a first charging current.

Assignees

• Yulong Computer Telecommunication Scientific Shenzhen Co Ltd

Inventors

• Wu Ju-Zhang

Classifications

• H02J7/575

  Parallel/serial switching of connection of batteries to charge or load circuit · CPC title

• H02J7/94

  in response to battery current · CPC title

• H02J7/56

  Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters · CPC title

• H02J7/92 Primary

  with prioritisation of loads or sources · CPC title

• H02J2207/20

  Charging or discharging characterised by the power electronics converter · CPC title