WO2011160572A1

WO2011160572A1 - Method and device for charging through universal serial bus interface

Info

Publication number: WO2011160572A1
Application number: PCT/CN2011/076001
Authority: WO
Inventors: 陈磊
Original assignee: 华为终端有限公司
Priority date: 2010-06-21
Filing date: 2011-06-21
Publication date: 2011-12-29
Also published as: CN101853970A

Abstract

A method and device for charging through a Universal Serial Bus (USB) interface are disclosed in the embodiments of the present invention. The method includes the following steps: connecting a device to be charged with a power supply device through the USB interface; closing the communication between a USB module and the power supply device; and charging the device to be charged by the power supply device through a power line of the USB interface. In the technical solutions of the present invention, the communication between the USB module of the device to be charged and the power supply device is stopped, and then the device to be charged is charged through the USB interface. In the method, the communication work of the USB module is stopped, so the USB module does not need to be always under a working condition when the device is charged through the USB interface, and the CPU of the device to be charged can stop working to make all currents be used for charging so as to improve the charging efficiency.

Description

Method and device for charging through universal serial bus interface The application claims to be submitted to the Chinese Patent Office on June 21, 2010, and the application number is CN201010208116. 6. The invention name is "a method for charging through a universal serial bus interface" The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of charging technologies, and in particular, to a method and apparatus for charging through a universal serial bus interface.

BACKGROUND OF THE INVENTION Universal Serial Bus (USB) charging function refers to a personal computer (PC,

Personal Computer) Or the USB port of the laptop to charge the terminal. The USB hardware interface usually has four lines and five lines. Generally, four lines are used, which are D+, D-, power and ground. According to the USB protocol, the external output current provided by the USB port power cable is limited to 500mA. Therefore, the charging function of the terminal often needs to be added with a current limit to prevent the risk of exceeding the current specified in the protocol and introducing the internal circuit of burning the PC or the notebook.

After the current mobile terminal and PC are connected through a USB cable, it is generally considered that the user needs to use the USB function to communicate between the PC and the mobile phone. For example: USB port on PC or USB, after connecting with USB via cable, first, the power cable on the USB cable has a voltage of 5V. On the mobile phone, the voltage is used to trigger the corresponding interrupt. Trigger the phone to start the USB initialization module, and then complete the USB handshake function with the PC through the changes on the D+ and D- lines. After the USB handshake operation is completed, the mobile phone correctly recognizes that it is connected to a USB host device, and then can start the USB charging function, that is, connect the 5V voltage on the USB power cable to the charging circuit inside the mobile phone to start charging. According to the USB protocol, the USB port of a PC or laptop can provide up to 500mA of power supply capability, but when the USB is in the normal working mode, since the mobile phone must respond to USB commands from the PC at all times, the mobile phone cannot be allowed to enter the sleep mode, resulting in power consumption. It will be very large, reducing the current charged into the battery.

In the research and practice of the prior art, the inventors of the present invention found that the USB module of the mobile phone is always in a working activation state in order to respond to the USB command initiated by the PC in time. Therefore, a large part of the current supplied by the USB port is consumed by the operating state of the mobile phone itself, resulting in a decrease in the current actually stored in the battery and an increase in charging time. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and apparatus for charging through a universal serial bus interface, which overcomes the problem of low charging efficiency through a USB interface in the prior art.

Embodiments of the present invention provide a method for charging through a universal serial bus interface, including:

Connecting the device to be charged to the power supply device through a universal serial bus interface;

Turn off communication between the universal serial bus module and the power supply device;

The power supply device charges the device to be charged through the power line of the universal serial bus interface.

The embodiment of the present invention further provides an apparatus for charging through a universal serial bus interface, including: a universal serial bus interface, a universal serial bus module, a battery, and a power supply module, the device further includes: a control module; The universal serial bus interface connects the device to the power supply device;

The control module is configured to close communication between the universal serial bus module and the power supply device;

The battery is used to charge a device to be charged by a power supply device through a power line of a universal serial bus interface.

The embodiment of the invention further provides a charging device with a universal serial bus interface, comprising: a universal serial bus interface, a power module, and a communication module, wherein the data line on the universal serial bus interface is connected to the communication module, and is universal The power line on the serial bus interface is connected to the power module, and the device further includes: a charging control module, configured to disconnect the data line on the universal serial bus interface connected to the communication module.

The embodiment of the invention adopts stopping communication between the USB module and the power supply device in the charged device, and then charging the charged device through the USB interface. Since the communication operation of the USB module is stopped in the method, when the device is charged through the USB interface, the USB module does not need to be in the working state all the time, so that the current is used for charging, thereby improving the charging efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative labor.

1 is a general flowchart of a method for charging through a USB interface according to an embodiment of the present invention; FIG. 2 is a specific flowchart of a method for charging through a USB interface according to an embodiment of the present invention; 3 is a schematic diagram of charging a mobile phone through a USB interface;

4 is a specific flowchart of another method for charging through a USB interface according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of an apparatus for charging through a USB interface according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a charging device with a USB interface according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to make those skilled in the art better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

FIG. 1 is a general flowchart of a method for charging through a USB interface according to an embodiment of the present invention. A method of charging via a USB interface provided in this embodiment is applied to a device that is charged through a USB interface, such as a mobile phone, an MP4, or the like. In this embodiment, the method may include:

Step 100: connect the device to be charged to the power supply device through a universal serial bus interface;

Step 101: Turn off communication between the USB module and the power supply device;

The communication with the USB module can be turned off, so that the data communication can not be performed between the devices connected through the USB interface; the USB module in the device that needs to be charged can be turned off, and the specific use of the USB module is provided. The circuit is disconnected from the USB module, thereby turning off the USB module, so that data communication between the devices connected through the USB interface is impossible; or the central processing unit (CPU) in the device to be charged can be turned off, thereby making The USB module does not work, so data communication between devices connected via the USB interface is not possible.

Step 102: The power supply device charges the device to be charged through the power cable of the USB interface.

The phone can be charged because the power cord on the USB port is still connected properly.

Through the above steps 101 and 102, a method of charging through the USB interface is realized. The method stops communication between the USB module and the power supply device in the charged device, and then charges the charged device through the USB interface. Since the USB module is stopped in the method, when the device is charged through the USB interface, the USB module does not need to be in the working state all the time, so that the current is used for charging, thereby improving the charging efficiency.

The following describes the implementation of step 101 using different operations.

FIG. 2 is a specific flowchart of a method for charging through a USB interface according to an embodiment of the present invention. The method incorporates hardware design to stop communication between the USB module and the power supply device in the device being charged.

Step 200: connecting the device to be charged to the power supply device through a universal serial bus interface;

Step 201: disconnect the data line that communicates with the USB module; Among them, a switch is added in the USB data line, and the communication between the charged device (such as a mobile phone) and a powered device (such as a PC) is terminated by controlling the opening and closing of the switch. For example: Figure 3 shows a mobile phone charging diagram through a USB interface. A triode is added to the data line in the mobile phone. The triode controls the on/off of D+ and D- through the control module in the mobile phone; the control module is based on the user's specific The operation is to issue a specific command. When the user enters the USB charging mode, the control module controls the transistor to be in an open state by controlling the transistor to be non-conducting, so that the USB module appears that the current D+ and D- lines are interrupted and are not connected. .

Step 202: The power supply device charges the device to be charged through the power cable of the USB interface.

Wherein, since the USB cable is plugged and unplugged in step 201, the PC is deceived, and in fact, the power cable on the USB interface is still connected normally, and the mobile phone can be charged.

Through the above description of a method of charging through the USB interface, it can be seen that the PC and the mobile phone are executed as if

When the USB device exits, the PC will clear the relevant USB port. The USB device will be disconnected from the mobile device and the USB module will be exited. In this way, the mobile phone can naturally enter the normal standby sleep mode. If the user chooses to exit the USB charging mode, the D+, D-line and the USB connection status of the mobile phone can be restored through the control module, so that both the PC and the mobile phone are standard new USB device connections. A normal initialization communication is initiated to establish a connection. Therefore, the USB device can stop other modules in its own device from consuming power during the charging process, so that the charging efficiency is higher.

FIG. 4 is a specific flowchart of a method for charging through a USB interface according to an embodiment of the present invention. The pure software in this method stops the communication between the USB module and the power supply device in the charged device.

Step 400: Connect the device to be charged to the power supply device through the universal serial bus interface.

Step 401: Stop supplying power to the USB module in the device to be charged, or turn off the working state of the CPU of the device to be charged; wherein, the universal serial bus module is connected to the central processing unit, and the universal serial bus module is controlled by the central processing unit. ;

Wherein, if the USB module in the charged device provides power through a separate power supply module (or a power supply circuit) for normal operation, the USB module can be powered by stopping the power supply module, so that the USB module is turned off. Therefore, communication between the USB module and the power supply device in the charged device is stopped.

If the USB module cannot be stopped by turning off the power, the operation of the CPU in the charging device can be turned off, thereby stopping the operation of the USB module. The specific operation may be: obtaining a signal to enter the charging mode; pinning out the voting decision of the USB module to allow the charging device to enter sleep; entering sleep. It should be understood that after the charging device enters sleep, the CPU in the charging device stops running, so the USB module stops working, that is, the communication between the USB module and the power supply device in the charged device is stopped, and the USB module does not consume power. .

Step 402: The power supply device charges the device to be charged through the power cable of the USB interface. The method of charging through the USB interface can be implemented based on the foregoing steps 401 and 402. However, from the viewpoint of the powered device, such as the PC, the USB device connected to the PC is in an abnormal working state, and the pop-up "cannot be The recognized USB device "or" does not work properly with the USB device connected to the device. In fact, the USB device connected to the PC is already charging. If the USB device connected to the PC needs to communicate with the PC and the user can choose to exit the USB charging mode, the software will re-execute the complete USB initialization process and re-establish a communication connection with the PC.

It should be noted that, before step 101, S201 or step 401, the method may further include: acquiring information entering the USB charging mode, and then triggering to perform step 101, S201 or step 401.

Another preferred method provided by the embodiment of the present invention is described below, in which the PC is used as a power supply device and a mobile phone is used as a device to be charged. The mobile phone includes at least: a USB interface, a USB module, a battery, a power supply module, and a CPU. When the mobile phone is connected to the PC through the USB interface, the PC will charge the battery on the mobile phone through the power cable of the USB port. When the PC wants to communicate with the USB module in the mobile phone through the data lines D+ and D-, for example, the PC wants to pass the The communication of the USB module identifies the device having the USB port (ie, identifies the mobile phone); however, the control unit in the mobile phone controls the triode control circuit to set the triode control circuit to a non-conducting state at this time, and therefore, the triode control circuit is relative to Switch, the port of the USB port data line and USB module communication. At this time, the mobile phone is charged by the PC through the power cable of the USB interface.

The mobile phone can also turn off the working state of its own CPU; wherein, the USB module is connected to the central processing unit, and the USB module is controlled by the central processing unit; when the mobile phone is removed from the mobile phone, the operation of the USB module is stopped. The specific operation may be: obtaining a signal to enter the charging mode; selling the USB module to determine whether the charging device is allowed to enter the voting right of sleep; entering sleep. It should be understood that after the charging device enters sleep, the CPU in the charging device stops running, so the USB module stops working, that is, the communication between the USB module and the power supply device in the mobile phone is stopped, and the USB module does not consume power.

The above is a specific implementation method for the PC to charge the mobile phone through the USB interface, and should not be construed as limiting the embodiment of the present invention.

FIG. 5 is a schematic diagram of an apparatus for charging through a USB interface according to an embodiment of the present invention. In this embodiment, the device includes: a USB module 501, a battery 502, a power supply module 503, a control module 504, and a USB interface 505.

The device to be charged is connected to the device through the USB interface 505;

The control module 504 is configured to close communication between the USB module 501 and a power supply device (such as P (:, portable computer, etc.); the USB module 501, the battery 502, the power supply module 503, and the USB interface 505 respectively function with the prior art. Similarly, the USB module 501 is used for direct communication with the power supply device, the battery 502 is used for charging through the USB interface, the power is stored, and the power supply module is provided with power, and the power supply module 503 is used for providing the power stored in the battery. Give the USB module.

Preferably, the control module 504 is specifically a first switch for disconnecting the data line of the USB module communication. In combination with the descriptions in FIG. 2 and FIG. 3, the data line communicating with the USB module is disconnected. When the device is connected to the PC, only the power cable of the USB interface in the device is connected to the battery, the battery is being charged, and the USB module is not Is working. Therefore, the USB module does not consume power and improves charging efficiency. It should be noted that the first switch may have a triode or other devices that implement a switching function.

Preferably, the control module 504 is specifically a second switch for stopping the power supply module 503 to supply power to the USB module 501. By supplying power to the USB module 501 by turning off the power supply module 503, the USB module is rendered inoperable, thereby turning off communication between the USB module 501 and the power supply device. Therefore, when charging through the USB interface, only the power cable of the USB interface in the device is connected to the battery, the battery is being charged, and the USB module does not consume power, thereby improving the charging efficiency of the device.

Preferably, the control module 504 can be specifically a CPU for shutting down its working state, and can also be understood as sleeping itself. The USB module 501 is connected to the CPU, and the universal serial bus module is controlled by the central processor. When the CPU is turned off, the working state of the corresponding USB module is also turned off, and the USB module can also be understood as being in a sleep state, thereby turning off communication between the USB module 501 and the power supply device. When the device is connected to the PC, only the power cable of the USB interface in the device is connected to the battery, the battery is being charged, and the USB module is not in operation, and the USB module does not consume power, thereby improving the charging efficiency of the device.

The device illustrated in FIG. 5 may specifically be a mobile phone having a USB interface, an MP3, a palmtop computer, or the like.

FIG. 6 is a schematic diagram of a charging device with a USB interface according to an embodiment of the present invention. In this embodiment, the device may be a PC, a notebook computer or the like, and the device includes: a USB interface 601, a power module 602, a communication module 603, and a charging control module 604.

The USB interface has a data line and a power line, wherein the data line is connected to the communication module 603, and the power line is connected to the battery module 602, and is used for charging the device to be charged through the power line;

The charging control module 604 is configured to disconnect the data line on the universal serial bus interface connected to the communication module. Alternatively, the charge control module 604 can control the disconnection of the data lines on the universal serial bus interface connected to the communication module in accordance with user commands.

The present invention further provides a charging system having a USB interface, including the charging device as described in FIG. 5 and the charging device as described in FIG. 6, wherein the charging system can be charged by any one of FIG. 1 to FIG. method.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. Wherein, the storage medium is It is a disk, a compact disk, a read-only memory (ROM), or a random access memory (RAM).

The embodiments of the present invention have been described in detail above, and the present invention has been described with reference to the specific embodiments thereof. The description of the above embodiments is only for facilitating understanding of the method and device of the present invention. Meanwhile, for those skilled in the art, In view of the above, the description of the present invention is not limited to the scope of the present invention.

Claims

Rights request

A method of charging through a universal serial bus interface, comprising:

The device to be charged is connected to the power supply device through a universal serial bus interface;

Turning off communication between the universal serial bus module of the device to be charged and the power supply device;

The device to be charged is charged by the power supply device through a power line of the universal serial bus interface.

2. The method according to claim 1, wherein the closing the communication between the universal serial bus module and the power supply device comprises:

The data line that is in communication with the universal serial bus module is disconnected.

The method according to claim 2, wherein the disconnecting the data line that is communicated with the universal serial bus module comprises:

The control module of the device to be charged controls the control switch of the data line communicating with the universal serial bus module to be disconnected according to a user instruction.

The data line on the universal serial bus interface connected to the power supply device communication module is controlled to be disconnected according to a user command.

The method according to claim 1, wherein the closing the communication between the universal serial bus module and the power supply device comprises:

Stop powering the universal serial bus module.

Turning off the operating state of the central processing unit of the charged device; wherein the universal serial bus module is connected to the central processor, and the universal serial bus module is controlled by the central processing unit.

The method according to any one of claims 1 to 6, wherein the power supply device is a personal power The closing communication between the universal serial bus module and the power supply device includes:

Disconnecting the data line that the personal computer communicates with the universal serial bus module;

Or, stopping powering the universal serial bus module;

Alternatively, the operating state of the central processing unit of the device to be charged is turned off; wherein the universal serial bus module is connected to the central processing unit, and the universal serial bus module is controlled by the central processing unit.

8. A device for charging through a universal serial bus interface, comprising: a universal serial bus interface, a universal serial bus module, a battery, and a power supply module, further comprising: a control module; wherein, the universal string is passed a line bus interface connecting the device to the power supply device;

The device according to claim 8, wherein the control module comprises:

And a first switch, configured to disconnect the data line that communicates with the universal serial bus module.

The device according to claim 8, wherein the control module comprises:

And a second switch, configured to stop powering the universal serial bus module.

The device according to claim 8, wherein the control module comprises:

a central processing unit, configured to shut down an operating state of a central processing unit of the device to be charged; wherein the universal serial bus module is connected to the central processing unit, and the universal serial bus module is controlled by the central processing unit.

12. A charging device having a universal serial bus interface, comprising: a universal serial bus interface, a power module, and a communication module, wherein a data line on the universal serial bus interface is connected to the communication module, a universal serial bus interface The power cable is connected to the power module, and further includes: a charging control module, configured to disconnect the data line on the universal serial bus interface connected to the communication module.

A charging system having a universal serial bus interface, comprising: the charging device according to any one of claims 8-11 and the charging device according to claim 12.