CN112583062A

CN112583062A - Quick charging method

Info

Publication number: CN112583062A
Application number: CN201910940132.5A
Authority: CN
Inventors: 候培学
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2021-03-30

Abstract

The invention is applicable to the field of charging, and provides a quick charging method which is applied to a power adapter. The method comprises the following steps: during the process that the power adapter is coupled to the mobile terminal, sending a clock signal to the mobile terminal through a first data line of the USB interface, wherein the clock signal is used for indicating the communication sequence between the power adapter and the mobile terminal; the power adapter is in bidirectional communication with the mobile terminal through a second data line of the USB interface under the control of the communication sequence so as to determine that the mobile terminal is charged in a quick charging mode; the power adapter adjusts the charging current of the power adapter to a charging current corresponding to the fast charging mode to charge the mobile terminal. By using the charging method of the invention, the power adapter does not blindly increase the charging current to realize the quick charging, but negotiates with the mobile terminal through the bidirectional communication with the mobile terminal to determine whether a quick charging mode can be adopted. Thereby improving the safety of the rapid charging process.

Description

Quick charging method

Technical Field

The invention relates to the field of charging, in particular to a quick charging method.

Background

Currently, mobile terminals (e.g., smart phones) are becoming increasingly popular with consumers. However, since the power consumption of the mobile terminal is large, the mobile terminal needs to be charged periodically. As the battery capacity of mobile terminals becomes larger, the charging time becomes longer accordingly. How to realize quick charging is an urgent problem to be solved.

The principle of fast charging is to increase the input value of the charging voltage or current. However, in the prior art, in order to achieve the purpose of fast charging, the durability of the mobile terminal is not considered, the output current of the power adapter is directly increased, the phenomenon that the mobile terminal is overheated or even burned out is caused, and the service life of the mobile terminal is reduced.

Disclosure of Invention

In order to solve the above problems, the present invention provides a fast charging method, which can improve the safety of the fast charging process.

A quick charging method is applied to a power adapter. The power adapter is coupled to the mobile terminal via a USB interface. And a power cord of the USB interface is used for charging the mobile terminal by the power adapter. The power adapter supports a normal charging mode and a quick charging mode, and the charging current corresponding to the quick charging mode is larger than that corresponding to the normal charging mode.

The method comprises the following steps: during the process that the power adapter is coupled to the mobile terminal, sending a clock signal to the mobile terminal through a first data line of the USB interface, wherein the clock signal is used for indicating the communication sequence between the power adapter and the mobile terminal; the power adapter is in bidirectional communication with the mobile terminal through a second data line of the USB interface under the control of the communication sequence so as to determine that the mobile terminal is charged in a quick charging mode; and the power adapter adjusts the charging current of the power adapter to the charging current corresponding to the quick charging mode so as to charge the mobile terminal.

The bidirectional communication includes the power adapter sending a first command to the mobile terminal through the second data line during the command sending time slot of the power adapter, the first command being used to inquire whether the mobile terminal activates the fast charge mode; and receiving a reply instruction corresponding to the first instruction through the second data line during the instruction receiving time slot of the power adapter. The reply instruction corresponding to the first instruction is used for indicating that the mobile terminal agrees to activate the quick charging mode; and the power adapter determines to charge the mobile terminal in a quick charging mode according to a reply instruction corresponding to the first instruction.

Preferably, the instruction receiving slot of the power adapter includes a plurality of clock cycles, and each of the plurality of clock cycles is for receiving 1-bit data.

Preferably, the first data line is a D + data line of the USB interface, and the second data line is a D-data line of the USB interface.

The invention has the advantages that before formal charging, the mobile terminal is in two-way communication with the power adapter to inquire whether a quick charging mode is adopted for charging or how much current is adopted for charging, and any mobile power supply cannot be automatically and quickly charged blindly, so that the charging safety is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic flow diagram of a fast charging method according to an embodiment of the present disclosure.

Detailed Description

The following description provides many different embodiments, or examples, for implementing different features of the invention. The particular examples set forth below are illustrative only and are not intended to be limiting.

Fig. 1 is a schematic flow diagram of a fast charging method according to an embodiment of the present disclosure. The invention is applied to the power adapter. The power adapter is coupled to the mobile terminal via a Universal Serial Bus (USB) interface. The USB interface can be a common USB interface or a MicroUSB interface. The power line of the USB interface is used for the power adapter to charge the mobile terminal, and may be a VBUS line and/or a ground line. The power adapter supports a normal charging mode and a quick charging mode, and the charging current corresponding to the quick charging mode is larger than that corresponding to the normal charging mode. For example, the charging current corresponding to the normal charging mode is typically less than 2.5A, and the charging current corresponding to the fast charging mode may be greater than 3A.

Step 1, in the process that the power adapter is coupled to the mobile terminal, the power adapter sends a clock signal to the mobile terminal through a first data line of the USB interface, and the clock signal is used for indicating the communication sequence between the power adapter and the mobile terminal.

It should be appreciated that the power adapter actively transmits the clock signal to the mobile terminal and maintains the transmission of the clock signal throughout the coupling of the power adapter to the mobile terminal.

And 2, the power adapter performs bidirectional communication with the mobile terminal through a second data line of the USB interface under the control of the communication sequence so as to determine that the mobile terminal is charged in the quick charging mode.

And 3, the power adapter adjusts the charging current of the power adapter to the charging current corresponding to the quick charging mode so as to charge the mobile terminal.

Specifically, the power adapter may pre-record the charging current corresponding to the fast charge mode. And when the mobile terminal is determined to be charged in the quick charging mode, directly adjusting the charging current of the power adapter to the charging current corresponding to the quick charging mode.

Alternatively, the power adapter may negotiate with the mobile terminal via two-way communication to determine a charging current corresponding to the fast charge mode; after negotiation, the charging current is adjusted to meet the charging current required by the mobile terminal.

Of course, if the mobile terminal does not reply to the fast charging mode for charging, the charging current of the power adapter is adjusted to be the normal charging mode for charging the mobile terminal.

Preferably, the communication sequence includes an instruction transmission slot of the power adapter and an instruction reception slot of the power adapter, and the instruction transmission slot and the instruction reception slot are alternately generated.

Specifically, under the control of the communication sequence, bidirectional communication is performed with the mobile terminal through the second data line of the USB interface to determine that the mobile terminal is charged in the fast charging mode. The method comprises the following steps:

(1) during the instruction sending time slot of the power adapter, the power adapter sends a first instruction to the mobile terminal through a second data line, wherein the first instruction is used for inquiring whether the mobile terminal activates a quick charging mode;

(2) receiving a reply instruction corresponding to the first instruction through a second data line during an instruction receiving time slot of the power adapter, wherein the reply instruction corresponding to the first instruction is used for indicating that the mobile terminal agrees to activate the fast charging mode; and the power adapter determines to charge the mobile terminal in a quick charging mode according to a reply instruction corresponding to the first instruction.

Optionally, in one embodiment, the instruction transmission slot of the power adapter includes a plurality of clock cycles, and each clock cycle is used to transmit 1-bit data.

Optionally, the instruction transmission slot of the power adapter includes eight clock cycles, and the first instruction includes 8 bits of data.

Optionally, the instruction receiving slot of the power adapter comprises a plurality of clock cycles, and each clock cycle is for receiving 1-bit data.

Alternatively, the instruction receiving slot of the power adapter includes 10 clock cycles, and the response instruction corresponding to the first instruction includes 10 bits of data.

Optionally, the first instruction is an instruction of a fast charge communication instruction set of the power adapter, and the instructions of the fast charge communication instruction set have the same first N bits.

Optionally, each clock cycle of the clock signal comprises a low level of 10us and a high level of 500 us.

Optionally, the first data line is a D + data line of the USB interface, and the second data line is a D-data line of the USB interface.

It is understood that the interactivity and correlation properties and functions of the power adapter and the mobile terminal described in the fast charging method performed by the mobile terminal correspond to the description of the fast charging method performed by the power adapter. For the sake of simplicity, repeated description will be appropriately omitted.

By using the charging method of the invention, the power adapter does not blindly increase the charging current to realize the quick charging, but negotiates with the mobile terminal through the bidirectional communication with the mobile terminal to determine whether a quick charging mode can be adopted. Compared with the prior art, the safety of the quick charging process is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fast charging method applied to a power adapter coupled to a mobile terminal via a USB interface, the method comprising:

(1) during the process that the power adapter is coupled to the mobile terminal, sending a clock signal to the mobile terminal through a first data line of the USB interface, wherein the clock signal is used for indicating the communication sequence between the power adapter and the mobile terminal;

(2) the power adapter is in bidirectional communication with the mobile terminal through a second data line of the USB interface under the control of the communication sequence so as to determine that the mobile terminal is charged in a quick charging mode;

(3) the power adapter adjusts the charging current of the power adapter to a charging current corresponding to the fast charging mode to charge the mobile terminal.

2. The fast charging method of claim 1, wherein the bidirectional communication comprises:

the power adapter sends a first instruction to the mobile terminal through the second data line during an instruction sending time slot of the power adapter, wherein the first instruction is used for inquiring whether the mobile terminal activates the quick charging mode;

and receiving a reply instruction corresponding to the first instruction through the second data line during the instruction receiving time slot of the power adapter.

3. The fast charging method according to claim 2, wherein the reply instruction corresponding to the first instruction is used to indicate that the mobile terminal agrees to activate the fast charging mode.

4. The fast charging method of claim 3, wherein the power adapter supports a normal charging mode and a fast charging mode, the fast charging mode corresponding to a charging current that is greater than a charging current corresponding to the normal charging mode.

5. The fast charging method of claim 4, wherein the instruction receiving slot of the power adapter comprises a plurality of clock cycles, and each of the plurality of clock cycles is for receiving 1-bit data.

6. The fast charging method according to one of claims 1 to 5, wherein when the mobile terminal does not resume the fast charging mode, the charging current of the power adapter is adjusted to charge the mobile terminal in the normal charging mode.

7. The fast charging method according to one of claims 1 to 5, wherein the first data line is a D + data line of the USB interface, and the second data line is a D-data line of the USB interface.