WO2011127695A1

WO2011127695A1 - Device and method for suppliying power of mobile terminal to external equipment

Info

Publication number: WO2011127695A1
Application number: PCT/CN2010/075192
Authority: WO
Inventors: 屈胜; 李磊; 周文春
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-04-12
Filing date: 2010-07-15
Publication date: 2011-10-20
Also published as: CN101795014B; CN101795014A

Abstract

A device and a method for supplying power from a mobile terminal to external equipment. A power management module (24) is provided between an external power supply connector (21) of the mobile terminal and a positive pole of a battery of the mobile terminal. After the power management module (24) is enabled by a baseband processor (23) or an application processor of the mobile terminal, the voltage and the current of the battery of the mobile terminal are adjusted to be the voltage and the current needed by the external equipment, so that power is supplied to the external equipment through the external power supply connector (21).

Description

Device and method for powering external device by mobile terminal

The present invention relates to the field of application of mobile terminals, and more particularly to an apparatus and method for a mobile terminal to supply power to an external device. Background technique

With the rapid development of electronic technology, the charging technology of mobile terminals such as mobile phones is also developing rapidly. At present, the latest mobile phone charging technologies such as wireless charging and solar charging technology have achieved certain results.

In the prior art, the charging principle diagram of the mobile phone, as shown in FIG. 1 , the charging management module has functions of controlling the charging voltage and the current magnitude, wherein the Vin terminal is a voltage input pin, and is connected to the charging interface of the mobile phone; the Vout terminal is a voltage. The output pin is connected to the positive Vbat of the battery; when the mobile phone charger is connected to the charging interface, the Vcharge pin of the charging management module is set to a low level, and the low level signal is automatically reported to the baseband processor, and the baseband processor will The enable terminal EN of the charge management module is set to a high level, the charge management module is enabled, and the battery of the mobile phone is charged; when the charging is completed, or when the mobile phone charger is disconnected from the charging interface, the Vcharge pin of the charging management module When set high, the baseband processor sets the enable terminal EN of the charge management module to a low level, and the charge management module stops working.

With the continuous development of charging technology, the battery capacity of mobile phones is getting larger and larger. With the support of large-capacity batteries, mobile phone batteries can not only be limited to a single power supply to mobile phones, but also enable mobile phone batteries to act as power supplies to achieve external devices. Power supply function; In addition, more and more mobile phone charging methods also create favorable conditions for the mobile phone to supply power to external devices. However, in the prior art, an effective method for powering a mobile phone to an external device needs further study. Summary of the invention

In view of this, the main object of the present invention is to provide an apparatus and method for a mobile terminal to supply power to an external device, so that the mobile terminal can implement power supply to the external device to meet the trend of the development of the mobile terminal.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a device for supplying power to an external device, including a baseband processor or an application processor, the device further includes: a power management module and an external power supply interface; wherein, the power management module is located at an external power supply interface of the mobile terminal And the positive pole of the battery, configured to adjust the battery voltage and current of the mobile terminal to meet the voltage and current required by the external device, and supply power to the external device through the external power supply interface;

An external power supply interface for transmitting electrical signals of the power management module to an external device.

In the above solution, the charging interface of the mobile terminal of the external power supply interface is an external power supply interface independent of the charging interface.

In the above solution, the input/output interface 1 (1/01) end of the baseband processor or the application processor is connected to the enable terminal EN of the charging management module in the mobile terminal, and is used for controlling the enabling of the charging management module; The enabling of the control charging management module is: when the baseband processor or the application processor sets the enable level of the charging management module to the corresponding enable level signal, the charging management module is enabled; otherwise, the charging management module stops working. ;

The 1/02 end of the baseband processor or the application processor is connected to the enable terminal EN of the power management module for controlling the power management module to be enabled, specifically: when the baseband processor or the application processor is to be used by the power management module When the enable terminal sets the corresponding enable level signal, the power management module is enabled; otherwise, the power management module stops working.

In the above solution, the power management module supplies power to the external device, specifically: the baseband processor or the application processor enables the power management module, and if the power management module has an adjustment function on the output voltage and current, receives the data communication interface. Baseband processor or application processor The voltage and current regulation commands adjust the output voltage and current to meet the voltage and current required by different external devices to supply power to the external device. If the power management module does not adjust the output voltage and current, it directly converts to a fixed voltage and current. After that, power is supplied to the external device that meets the conditions.

The present invention also provides a method for a mobile terminal to supply power to an external device, the method comprising: setting a power management module between the external power supply interface of the mobile terminal and the battery positive pole, and after the power management module is enabled, the battery of the mobile terminal is After the voltage and current are adjusted to meet the voltage and current required by the external device, the external device is powered by the external power supply interface.

In the above solution, the external power supply interface is specifically: a charging interface of the mobile terminal, or an external power supply interface independent of the charging interface.

In the above solution, when the external power supply interface is a charging interface of the mobile terminal, the method further includes: inserting a power supply line of the external device into the external power supply interface, opening an external power supply function of the mobile terminal, and determining by the baseband processor or the application processor Whether the charger exists, if the charger is present, exit the external power supply function; otherwise, enable the power management module;

When the external power supply interface is an external power supply interface independent of the charging interface, the method further includes: inserting a power supply line of the external device into the external power supply interface, and opening an external power supply function of the mobile terminal, the baseband processor or the application processor Can power management module.

In the above solution, the power management module supplies power to the external device, specifically: the baseband processor or the application processor enables the power management module, and if the power management module has an adjustment function on the output voltage and current, receives the data communication interface. A voltage and current regulation command from the baseband processor or application processor that regulates the output voltage and current to meet the voltages and currents required by different external devices to power external devices: If the power management module is not adjustable for output voltage and current, After directly converting to a fixed voltage and current, power is supplied to external devices that meet the conditions.

In the above solution, the method further includes: after the external power supply of the mobile terminal ends, the external power supply function is turned off, and the baseband processor stops the power management module from working.

In the above solution, the power management module is enabled, specifically: a baseband processor or an application The 1/02 end of the processor is connected to the enable terminal EN of the power management module. When the baseband processor or the application processor sets the enable terminal EN of the power management module to the corresponding enable level signal, the power management module is controlled. can;

The charging management module is enabled to: connect the 1/01 end of the baseband processor or the application processor to the enable terminal EN of the charging management module in the mobile terminal, and enable the charging management module when the baseband processor or the application processor When the terminal EN sets the corresponding enable level signal, the charge management module is controlled to be enabled.

The present invention provides a device and method for powering an external device by a mobile terminal, and a power management module is disposed between the external power supply interface of the mobile terminal and the battery positive terminal. After the power management module is enabled, the battery voltage of the mobile terminal is After the current is adjusted to meet the voltage and current required by the external device, the external power supply interface is used to supply power to the external device; wherein, the external power supply interface may be a charging interface of the mobile terminal, or may be an external power supply interface independent of the charging interface. When the external power supply interface belongs to the latter, the mobile terminal can be powered to the external device while charging. By using the device and the method of the invention, the power supply of the mobile terminal to the external device can be realized, and the current trend of the development of the mobile terminal is satisfied. DRAWINGS

1 is a schematic diagram of charging of a mobile phone in the prior art;

2 is a structural diagram of a device for powering an external device by a mobile terminal according to the present invention;

3 is a schematic structural diagram of an apparatus for powering an external device by a mobile terminal according to the present invention; and FIG. 4 is a flow chart of a method for powering an external device by the mobile terminal according to the present invention. detailed description

The basic idea of the present invention is: a power management module is disposed between the external power supply interface of the mobile terminal and the battery positive pole, and after the power management module is enabled, the battery voltage and current of the mobile terminal are adjusted to meet the voltage required by the external device. After the current is supplied to the external device through the external power supply interface. The power supply device for the external device provided by the mobile terminal includes a baseband processor, as shown in FIG. 2, the device further includes: a power management module and an external power supply interface;

The power management module is located between the external power supply interface of the mobile terminal and the positive pole of the battery, and is configured to adjust the battery voltage and current of the mobile terminal to meet the voltage and current required by the external device, and supply power to the external device through the external power supply interface;

The input/output interface 1 (1/01) end of the baseband processor is connected to the enable terminal EN of the charging management module in the mobile terminal, and is used to control the enabling of the charging management module, specifically: when the baseband processor is to be charged When the enable terminal of the management module sets the corresponding enable level signal, the charge management module is enabled to start charging the battery of the mobile phone. Otherwise, the charge management module stops working; the 1/02 end of the baseband processor and the power management module The enable terminal EN is connected to control the power management module, specifically: when the baseband processor sets the enable level of the power management module to the corresponding enable level signal, the power management module is enabled, and starts to The external device is powered; otherwise, the power management module stops working.

In the following, taking the mobile terminal as a mobile phone as an example, the scheme of the present invention is described in detail, and it is assumed that when the enable terminal EN is set to a high level signal, the corresponding module is enabled and operates; when the enable terminal EN is set to a low level signal, the corresponding module stop working.

The working principle of the device for supplying power to the external device by the mobile terminal of the present invention is as follows: In the default, in order to prevent the loss of the battery power of the mobile phone, the enable terminal EN of the power management module is set to a low level, and the power management module stops working to avoid The battery positive Vbat terminal inputs current to the input terminal Vin of the power management module. At this time, the enable terminal EN of the charging management module is also set to a low level, and the charging management module also stops working; when the charger of the mobile phone is inserted into the external power supply interface When the Vcharge terminal of the charging management module reports a low level signal to the baseband processor, the baseband processor sets the enable terminal EN of the charging management module to a high level, the charging management module enables, and charges the mobile phone battery.

When the power supply line of the external device is inserted into the external power supply interface, the external supply of the mobile phone is turned on. After the electrical function, the baseband processor sets the enable terminal EN of the power management module to a high level, and enables the power management module; if the interface for charging the mobile phone and the external power supply interface of the mobile phone are the same interface, the external power supply of the mobile phone is turned on. After the function, the baseband processor determines the level of the Vcharge terminal of the charging management module. If the level of the Vcharge terminal is low, the external power supply function is exited. Otherwise, the power management module is enabled. After the power management module is enabled, the battery voltage of the mobile phone is input from the positive Vbat terminal of the battery to the input terminal Vin of the power management module, and is converted into the voltage and current required by the external device in the power management module, from the output terminal of the power management module. Output, and supply power to external devices through the external power supply interface. Here, if the power management module has an adjustable function for voltage and current, the user selects a voltage and current suitable for the operation of the external device through corresponding menu options, and the baseband processor passes the data communication interface according to the selected voltage and current, such as: The line interface or the parallel interface sends a voltage and current adjustment command to the power management module, so that the power management module adjusts the voltage and current according to the adjustment command to meet the voltage and current required by different external devices, and supplies power to the external device to ensure different Normal operation of the external device; If the power management module is not adjustable for voltage and current, after directly converting the internal voltage and current into the power management module, directly supply power to the external device that meets the conditions. The external device means: The voltage and current required for the external device to work properly match the fixed voltage and current converted by the power management module.

The external power supply interface may be a charging interface used to charge the mobile phone, such as a commonly used 5pin interface, or other types of interfaces, as long as the electrical signal of the power supply line of the mobile phone charger and the external device can be transmitted; In actual use, an external power supply interface is additionally provided, which is independent of the charging interface. As shown in FIG. 3, the device has a charging interface and an external power supply interface, so that the charging management module and the power management module work simultaneously, so that the mobile phone When charging is performed through the charging interface, power can be supplied to the external device through the external power supply interface.

For the smart mobile terminal, the above solution can be implemented by using an application processor instead of the baseband processor. In the existing design, the baseband processor and the charging management module can be integrated into one chip, and the present invention can also adopt this method, which will not be described in detail herein.

Based on the foregoing device, the present invention further provides a method for a mobile terminal to supply power to an external device. As shown in FIG. 4, the device described in FIG. 2 is taken as an example to describe the method, including the following steps:

Step 401: Insert the power supply line of the external device into the external power supply interface, open the external power supply function of the mobile terminal, and the baseband processor determines whether the charger exists. If the charger exists, the external power supply function is exited; otherwise, step 402 is performed;

In this step, after the user inserts the power supply line of the external device into the external power supply interface, the external power supply function of the mobile phone can be opened through the corresponding option in the mobile terminal, such as the mobile phone menu; for the device described in FIG. 2, the external power supply interface At the same time, it is also used as a charging interface. The charging function of the mobile phone and the external power supply function cannot be simultaneously performed. To prevent the user from misoperation, the charger line is mistakenly inserted into the external power supply interface as the external power supply interface, and the baseband processor is managed according to the charging. The level of the Vcharge terminal of the module determines whether the charger is present. If the Vcharge terminal is low, indicating that the mobile phone charger is present, the user is notified that the external power supply function is unavailable, and the external power supply function is exited; if the Vcharge terminal is at a high level, If the mobile phone charger does not exist, go to step 402.

Step 402: The baseband processor sets the enable terminal EN of the power management module to a high level to enable the power management module.

Step 403: The power management module implements power supply to the external device through the external power supply interface. In this step, after the power supply line of the external device is inserted into the external power supply interface, the voltage is input from the positive Vbat end of the mobile phone battery through the input terminal Vin of the power management module. The baseband processor can send voltage and current adjustment commands to the power management module through a data communication interface such as a serial interface or a parallel interface according to the voltage and current required by the external device; the power management module adjusts the output voltage and current according to the above adjustment command. After satisfying the conditions of voltage and current, from the power management module The output terminal Vout outputs and supplies power to the external device through the external power supply interface to ensure the normal operation of the external device.

Step 404: After the external power supply ends, the external power supply function of the mobile terminal is turned off, and the power management module stops working.

In this step, when the mobile phone ends the power supply to the external device, the user turns off the external power supply function of the mobile phone through the menu option, and the baseband processor sets the enable terminal EN of the power management module to a low level, so that the power management module stops working.

For the device described in FIG. 3, in step 401, after the user turns on the external power supply function of the mobile phone, since the charging function of the mobile phone and the external power supply function can be simultaneously performed, the baseband processor does not need to determine whether the mobile phone charger exists or not. Enable the power management module.

The method implemented by the present invention is described in detail below by way of specific embodiments:

When the charging management module and the power management module do not work at the same time: When the user needs to use the mobile phone to supply power to the external device, connect the charging interface to the power supply line of the external device, and open the external power supply function through the menu option of the mobile phone, if the mobile phone The charger does not exist, the baseband processor enables the power management module, and the voltage is input from the positive Vbat terminal of the mobile phone battery through the input terminal Vin of the power management module; the baseband processor passes the data communication interface to the power supply according to the voltage and current required by the external device. The management module sends voltage and current adjustment commands; after adjusting the voltage and current, the power management module outputs the voltage and current satisfying the condition from the output terminal Vout of the power management module, and supplies power to the external device through the charging interface to ensure the external device. The normal work.

For the charging management module and the power management module can work at the same time: When the mobile phone is charging, the charging interface is connected with the mobile phone charger, and the charging management module works; when the user needs to use the mobile phone to supply power to the external device, the external power supply interface of the mobile phone It is connected to the power supply line of the external device, and the external power supply function is turned on through the menu option of the mobile phone. The baseband processor enables the power management module, the power management module and the charging management module to work simultaneously, so that the mobile phone can supply power to the external device while charging. . The external power supply interface described above can be implemented by a USB interface.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A device for providing power to an external device by a mobile terminal, comprising a baseband processor or an application processor, the device further comprising: a power management module and an external power supply interface; wherein, the power management module is located at the external terminal of the mobile terminal The power supply interface and the positive pole of the battery are used to adjust the battery voltage and current of the mobile terminal to meet the voltage and current required by the external device, and supply power to the external device through the external power supply interface;

2. The device according to claim 1, wherein the external power supply interface is a charging interface of the mobile terminal, or an external power supply interface independent of the charging interface.

The device according to claim 2, wherein the input/output interface 1 (1/01) end of the baseband processor or the application processor is connected to the enable terminal EN of the charging management module in the mobile terminal, For controlling the enabling of the charging management module; the enabling of the charging management module is: when the baseband processor or the application processor sets the enable level of the charging management module to the corresponding enable level signal, the charging management module Enable; otherwise, the charge management module stops working;

The 1/02 end of the baseband processor or the application processor is connected to the enable terminal EN of the power management module for controlling the enabling of the power management module; the enabling of the control power management module is: baseband processor or application processing When the enable level of the power management module is set to the corresponding enable level signal, the power management module is enabled; otherwise, the power management module stops working.

4. The apparatus according to claim 1, wherein the power management module supplies power to the external device as: a baseband processor or an application processor enables the power management module, if the power management module has an output voltage and current The adjustment function receives the voltage and current adjustment commands of the baseband processor or the application processor through the data communication interface, adjusts the output voltage and current to meet the voltage and current required by different external devices, and supplies power to the external device; if the power management module If the output voltage and current are not adjustable, then directly convert to a fixed voltage and current, and supply power to the external device that meets the conditions.

A method for powering an external device by a mobile terminal, the method comprising: setting a power management module between the external power supply interface of the mobile terminal and the battery positive terminal, and after the power management module is enabled, the mobile terminal is After the battery voltage and current are adjusted to meet the voltage and current required by the external device, the external power supply is supplied to the external device through the external power supply interface.

The method according to claim 5, wherein the external power supply interface is a charging interface of the mobile terminal, or an external power supply interface independent of the charging interface.

The method according to claim 6, wherein when the external power supply interface is a charging interface of the mobile terminal, the method further includes: inserting a power supply line of the external device into the external power supply interface, and opening the external terminal of the mobile terminal The power supply function, the baseband processor or the application processor determines whether the charger exists, and if the charger exists, exits the external power supply function; otherwise, the power management module is enabled;

8. The method according to claim 5, wherein the power management module supplies power to the external device as: a baseband processor or an application processor enables the power management module if the power management module has an output voltage and current The adjustment function receives the voltage and current regulation commands of the baseband processor or the application processor through the data communication interface, adjusts the output voltage and current to meet the voltage and current required by different external devices, and supplies power to the external device: If the power management module If the output voltage and current are not adjustable, then directly convert to a fixed voltage and current, and supply power to the external device that meets the conditions.

The method according to any one of claims 5 to 8, wherein the method further comprises: after the external power supply of the mobile terminal ends, the external power supply function is turned off, and the baseband processor stops the power management module.

The method according to any one of claims 5 to 8, wherein the power source The management module is enabled as follows: The 1/02 end of the baseband processor or the application processor is connected to the enable terminal EN of the power management module, and the baseband processor or the application processor sets the enable terminal EN of the power management module accordingly. When the level signal is enabled, the control power management module is enabled;