WO2014075498A1

WO2014075498A1 - Charging management method, device and system

Info

Publication number: WO2014075498A1
Application number: PCT/CN2013/083128
Authority: WO
Inventors: 刘嘉俊; 韩正渭; 吴继文
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-11-19
Filing date: 2013-09-09
Publication date: 2014-05-22
Also published as: CN102957193B; CN102957193A

Abstract

Disclosed are a charging management method, device and system. The method comprises: when accessing a mobile terminal, an adapter judges whether a quick charging identifier issued by the mobile terminal side is detected, and if so, charging the mobile terminal based on a preset quick charging mode, otherwise, charging the mobile terminal based on a standard charging mode. On the premise of not adding a dedicated charging interface, the embodiments of the present invention realize that a specific mobile terminal can be quickly charged, shortening the charging time, and a non-specific terminal product can also be charged in the case of needing to ensure its safety, thereby greatly improving the universality of an adapter.

Description

Charge management method, device and system

The present invention relates to the field of communications technologies, and in particular, to a charging management method, apparatus, and system. Background technique

Mobile terminal products are increasingly favored by consumers, including smartphones and UFI products. The battery capacity of these two types of products is also increasing. The battery capacity of smartphones is mostly 2000MAh, while UFI products are even more 4000MAh or more. However, the power consumption of products such as mobile terminals is increasing, which means that mobile terminal products need to be charged after being used for a short time. Now the mainstream charging current is about 1A, so it takes about 2.5 hours to charge the 2000MAh battery, and 4000 hours for the 4000MAh battery, and the battery capacity has an increasing trend, so that the charging time for charging the battery will be longer. More than 6 hours will greatly reduce the user experience. However, if the charging current is increased to 3A, the charging time will be shortened to 50 minutes and 1.5 hours, and at least two-thirds of the charging time will be shortened. To achieve 3A charging, it is necessary to input 5V, 3A or 10V, 1.5A to the charging chip. If you choose 5V, 3A, the charging interface used by mobile terminals is now the standard Micro (USB) Universal Serial Bus (USB) interface, which is a data and charging multiplexing interface, but this interface can not withstand 3A current capability, if you add a charging interface, this will increase the cost and affect the slimming effect of the whole machine. Therefore, at present, for the implementation of fast charging, the preferred 10V, 1.5A solution. However, when the mobile terminal adopts a 10V, 1.5A charging scheme, its demand for the adapter also changes, that is, a 10V, 1.5A adapter is needed to charge the mobile terminal, but considering that the interface is a universal interface, the user may This adapter will be used to charge other mobile terminals, while other mobile terminals generally cannot withstand 10V, 1.5A adapters, and there is a serious risk of burning other mobile terminals. Therefore, there is a need for a solution that allows adapters that support fast charging to be other Fast charging mobile terminal charging is not supported. Summary of the invention

The embodiment of the invention provides a charging management method, device and system for solving the problem that the adapter supporting the specific charging standard in the prior art can only be compatible with a specific device, thereby causing poor versatility.

In order to solve the above problem, the technical solution adopted by the embodiment of the present invention is as follows:

The embodiment of the invention provides a charging management method, and the method includes:

When the adapter accesses the mobile terminal, it determines whether the fast charging identifier sent by the mobile terminal side is detected, and if so, charges the mobile terminal based on the preset fast charging mode; no, the standard charging mode is The mobile terminal is charged.

Preferably, in the method of the embodiment of the present invention, the fast charging mode is a charging mode in which a charging parameter is higher than a standard charging parameter; the fast charging identifier is a frequency of 10 kHz, an amplitude of 3 V, and a duty ratio of 50. % periodic square wave.

The embodiment of the invention further provides a charging management method, the method comprising:

When the mobile terminal supporting fast charging detects the access of the adapter, it transmits a quick charging identifier to the adapter side, and charges the battery according to the power supplied by the adapter.

Preferably, in the method of the embodiment of the present invention, the mobile terminal accesses the adapter through a USB interface, and outputs the fast charging identifier to a positive (DP) signal of a USB data line of the USB interface. On the line, the fast charging identifier is sent to the adapter.

Preferably, in the method of the embodiment of the present invention, the mobile terminal applies a fixed voltage to the DP signal line of the USB interface when the device is accessed by the USB interface, and detects the USB data of the USB interface. Whether the negative (DM) signal line of the line is the same as the voltage on the DP signal line, and if it is the same, it is determined that the adapter is connected.

The embodiment of the invention further provides an adapter, the adapter supports fast charging, and the adapter includes: The flag detecting unit is configured to: after the adapter accesses the mobile terminal, detect whether the fast charging identifier sent by the mobile terminal side is received, and send the detection result to the first main control unit; the first main control unit is configured to be The detection result is that when the fast charging identifier is received, the fast charging indication message is sent to the voltage converting unit; otherwise, the standard charging indication message is sent to the voltage converting unit;

The voltage conversion unit is configured to: when the fast charging indication message is received, charge the mobile terminal according to a preset fast charging mode; after receiving the standard charging indication message, the standard charging mode is the mobile terminal Charging.

Preferably, in the adapter of the embodiment of the present invention, the flag detecting unit is configured to detect, after the adapter accesses the mobile terminal, whether the frequency sent by the mobile terminal side is 10 KHz, the amplitude is 3 V, and the duty ratio is a 50% periodic square wave;

Preferably, in the adapter of the embodiment of the present invention, the voltage conversion unit is configured to: when receiving the fast charging indication message, the charging mode based on the preset charging parameter higher than the standard charging parameter is the mobile terminal Charging.

Preferably, in the adapter of the embodiment of the present invention, the flag detecting unit is further configured to convert the identifier into a high level signal when the fast charging identifier is detected, and the high power The flat signal is sent to the first main control unit as a result of receiving the detection of the fast charging identifier.

The embodiment of the present invention further provides a mobile terminal, where the mobile terminal supports fast charging, and the mobile terminal includes:

a second main control unit configured to send an adapter access indication message to the power management unit when the adapter access is detected;

a power management unit, configured to send a fast charging identifier to the adapter after receiving the adapter indication message;

A charging unit configured to charge the battery according to a power source provided by the adapter. Preferably, in the mobile terminal of the embodiment of the present invention, the second main control unit is configured to implement the adapter to the adapter by outputting the fast charging identifier to a DP signal line of a USB interface that is connected to the adapter. Sending the fast charge identifier.

Preferably, in the mobile terminal of the embodiment of the present invention, the second main control unit is further configured to apply a fixed voltage to the DP signal line of the USB interface when the USB interface has device access, and It is detected whether the DM signal line of the USB interface is the same as the voltage on the DP signal line. If they are the same, it is determined that the adapter is connected.

The embodiment of the present invention further provides a charging management system, where the system includes an adapter and a mobile terminal provided by the embodiments of the present invention.

The beneficial effects of the embodiments of the present invention are as follows:

The method, the device and the system according to the embodiments of the present invention can realize fast charging for a specific mobile terminal without greatly increasing the dedicated charging interface, greatly shorten the charging time (about 50% or less), and improve product competition. The ability to charge non-specific end products while maintaining safety can be seen to improve the versatility of the adapter. At the same time, the charging management method of the embodiment of the invention has the advantages of simple circuit design, small size, stable function and the like. DRAWINGS

1 is a flowchart of a charging management method according to Embodiment 1 of the present invention;

2 is a flowchart of a charging management method according to Embodiment 2 of the present invention;

3 is a structural block diagram of an adapter according to Embodiment 3 of the present invention;

4 is a structural block diagram of a mobile terminal according to Embodiment 4 of the present invention;

FIG. 5 is a structural block diagram of a mobile terminal according to Embodiment 5 of the present invention; FIG.

6 is a structural block diagram of an adapter according to Embodiment 5 of the present invention;

7 is a circuit structural diagram of a flag detecting unit in Embodiment 5 of the present invention;

8 is a waveform simulation diagram of each point of the mark detecting circuit in the fifth embodiment of the present invention;

9 is a flowchart of a charging management method according to Embodiment 5 of the present invention; FIG. 10 is a structural block diagram of a charging management system according to Embodiment 6 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the embodiments of the present invention.

The embodiment of the present invention provides a charging management method, apparatus, and system, which are used to solve the problem that the adapter supporting the specific charging standard in the prior art can only be compatible with a specific device, thereby causing poor versatility. A flowchart of a management method is provided. As shown in FIG. 1 , an embodiment of the present invention provides a charging management method, where the method is applied to an adapter side that supports fast charging, and specifically includes the following steps:

Step S101: The adapter accesses the mobile terminal.

Step S102: The adapter determines whether the fast charging identifier sent by the mobile terminal side is detected. If yes, step S103 is performed; otherwise, step S104 is performed.

In step S102, the mobile terminal that issues the fast charging identifier refers to a mobile terminal that supports fast charging.

In step S102, the fast charging identifier is preferably a periodic square wave, and the periodic square wave may be a periodic square wave having a frequency of 10 kHz, an amplitude of 3 V, and a duty ratio of 50%. Certainly, the specific form of the fast charging identifier is only one of the implementation manners. The mobile terminal and the adapter that support the fast charging can be configured in any form of the identifier, as long as the notification purpose can be achieved. Specifically limited.

Step S103: The adapter charges the mobile terminal based on a preset fast charging mode. The fast charging mode is a charging mode in which a charging parameter is higher than a standard charging parameter; For example, a charging mode in which the charging voltage is 10 V and the charging current is 1.5 A.

Step S104: The adapter charges the mobile terminal based on a standard charging mode.

In summary, it can be seen that, in the method of the embodiment of the present invention, the adapter determines whether the access is a mobile terminal that supports fast charging by determining whether the fast charging identifier is detected, and uses different modes as corresponding types according to the determination result. Mobile terminal charging. It can be seen that, in the embodiment of the present invention, the adapter can support different types of charging modes, thereby enhancing the versatility of the adapter.

2 is a flowchart of a charging management method according to Embodiment 2 of the present invention; as shown in FIG. 2, an embodiment of the present invention provides a charging management method, where the method is applied to a mobile terminal side that supports fast charging, and specifically includes the following Steps:

Step S201: The mobile terminal supporting fast charging detects the adapter access.

The mobile terminal accesses the adapter through a USB interface, and transmits the fast charging identifier to the adapter by outputting the fast charging identifier to the DP signal line of the USB interface.

Preferably, in step S201, the manner in which the mobile terminal detects whether the adapter is accessed includes: when the USB interface has a device access, the mobile terminal applies a fixed voltage to the DP signal line of the USB interface, and detects the DM signal line of the USB interface. Whether the voltage on the DP signal line is the same or not, if it is the same, it is determined that the adapter is connected; otherwise, it is determined that the USB data line is connected.

Step S202: The mobile terminal sends a fast charging identifier to the adapter side.

The fast charge identifier is preferably a periodic square wave having a frequency of 10 kHz, an amplitude of 3 V, and a duty ratio of 50%.

Step S203: The mobile terminal charges the battery according to the power provided by the adapter. In summary, it can be seen that, in the method of the embodiment of the present invention, when the mobile terminal supporting fast charging detects an adapter access, it automatically sends an identifier to the adapter to notify the adapter that it supports the fast charging mode, thereby enabling A fast charging adapter can be used to quickly charge the mobile terminal. FIG. 3 is a structural block diagram of an adapter according to Embodiment 3 of the present invention; as shown in FIG. 3, an embodiment of the present invention provides an adapter, where the adapter supports fast charging, and the adapter includes: a flag detecting unit 310, a first main Control unit 320 and voltage conversion unit 330, wherein:

The flag detecting unit 310 is configured to detect whether the fast charging identifier sent by the mobile terminal side is received after the adapter accesses the mobile terminal, and send the detection result to the first main control unit 320;

Preferably, in the flag detecting unit 310, the fast charging identifier refers to a periodic square wave having a frequency of 10 kHz, an amplitude of 3 V, and a duty ratio of 50%;

Preferably, the flag detecting unit 310 is further configured to convert the identifier into a high level signal when the fast charging identifier is detected, and receive the high level signal as the fast The detection result of the charging identifier is sent to the first main control unit 320.

The first main control unit 320 is configured to send a fast charging indication message to the voltage converting unit 330 when the detection result is that the fast charging identifier is received; otherwise, send a standard charging indication message to the voltage converting unit 330;

The voltage conversion unit 330 is configured to: when receiving the fast charging indication message, charge the mobile terminal according to a preset fast charging mode; upon receiving the standard charging indication message, the mobile based on the standard charging mode Terminal charging.

Preferably, in the voltage conversion unit 330, the preset fast charging mode is a charging mode in which the charging parameter is higher than the standard charging parameter.

In the actual application, the flag detecting unit 310 and the first main control unit 320 may be implemented by a central processing unit (CPU) in the adapter, or a digital signal processor (DSP), or Implemented by a Field-Programmable Gate Array (FPGA); the voltage conversion unit 330 can be implemented by a voltage converter in an adapter in practical applications.

In summary, it can be seen that the adapter according to the embodiment of the present invention determines whether the fast is detected. The speed charging identifier determines whether the access is a mobile terminal that supports fast charging, and charges the mobile terminal of the corresponding type in different modes according to the judgment result. It can be seen that, in the embodiment of the present invention, the adapter can support different types of charging modes, thereby enhancing the versatility of the adapter.

4 is a structural block diagram of a mobile terminal according to Embodiment 4 of the present invention; as shown in FIG. 4, an embodiment of the present invention provides a mobile terminal, where the mobile terminal supports fast charging, and the mobile terminal includes: The unit 410, the power management unit 420, and the charging unit 430, wherein: the second main control unit 410 is configured to send an adapter access indication message to the power management unit when detecting the adapter access; preferably, the fast charging identifier The symbol is preferably a periodic square wave having a frequency of 10 kHz, an amplitude of 3 V, and a duty ratio of 50%.

The power management unit 420 is configured to send a fast charging identifier to the adapter after receiving the adapter indication message;

The charging unit 430 is configured to charge the battery according to the power provided by the adapter.

The second main control unit 410 is configured to transmit the fast charging identifier to the adapter by outputting the fast charging identifier to the DP signal line of the USB interface of the access adapter.

Preferably, the second main control unit 410 is further configured to apply a fixed voltage to the DP signal line of the USB interface when the USB interface has device access, and detect the DM signal line of the USB interface and the DP. Whether the voltage on the signal line is the same, if it is the same, it is determined that the adapter is connected; otherwise, it is determined that the USB data line is connected.

In the actual application, the second main control unit 410 and the power management unit 420 can be implemented by a CPU, a DSP, or an FPGA in the mobile terminal; in an actual application, the charging unit 430 can be used by the mobile terminal. Charger implementation.

In summary, it can be seen that the mobile terminal supporting fast charging according to the embodiment of the present invention automatically sends an identifier to the adapter when the adapter is detected to notify the adapter to support the fast charging mode, thereby enabling Adapter for fast charging for mobile terminals Fast charging.

The method of the first embodiment and the second embodiment and the third and fourth embodiments are further described. The specific implementation details are respectively described in detail from the mobile terminal side and the adapter side, and the technical solutions provided by the embodiments of the present invention are further described in detail. The specific implementation details described in this embodiment are only for explaining the present invention, and are not limited to the present invention, and specifically relate to the following contents:

5 is a structural block diagram of a mobile terminal according to Embodiment 5 of the present invention. As shown in FIG. 5, the mobile terminal according to the embodiment of the present invention specifically includes: a second main control unit 410, a power management unit 420, a charging unit 430, and a battery. 440 and USB interface 450, where:

The second main control unit 410: when the USB data line (computer USB interface power supply) or the adapter (commercial power supply) is inserted into the USB interface 450, the second main control unit 410 adds a fixed voltage to the DP signal line of the USB interface 450. Then, it is detected whether the voltage is also on the DM signal line. If the adapter is inserted, the DP and DM are short-circuited, so the voltages on the DP and DM are the same. When the USB cable is plugged in, the DP and DM are disconnected, so that the difference is whether the adapter is inserted or the USB cable is inserted. When it is determined that the adapter is inserted, the second main control unit 410 controls the power management unit 420 to output a periodic square wave having a frequency of ΙΟΚΗζ, an amplitude of about 3 V, and a duty ratio of 50%, and the periodic square wave is added to the DP. On the signal line, the signal is detected as a flag detecting unit of the adapter.

The charging unit 430 is configured to charge the battery, which is controlled by the second main control unit 410 to perform different voltage and current charging processes.

FIG. 6 is a structural block diagram of an adapter according to Embodiment 5 of the present invention; as shown in FIG. 6, the adapter according to the embodiment of the present invention specifically includes: a first main control unit 320, a flag detecting unit 310, a voltage converting unit 330, and a USB interface. 350, mains interface 340, where:

The flag detecting unit 310 is configured to detect the DP signal line of the USB interface 350, and convert the periodic signal of the detected DP signal line into a high level flag signal, and provide the signal to the first main control unit 320. FIG. 7 is a circuit structural diagram of a flag detecting unit according to Embodiment 5 of the present invention; as shown in FIG. 7, an embodiment of the present invention provides an implementation manner of a flag detecting unit, which can set a frame with an amplitude of about 3V. A periodic square wave with a duty cycle of 50% converts a level signal of approximately IV. 8 is a waveform simulation diagram of each point of the flag detecting circuit in the fifth embodiment of the present invention; the processing procedure of the detecting circuit shown in FIG. 7 will be described below with reference to FIG. Fig. 8 is a waveform simulation of each point of the mark detecting circuit, in which DP is an input waveform and Vout is an output waveform. The specific processing procedure of the flag detection circuit is as follows: the input periodic signal V ( dp ) is subjected to a threshold value processing to obtain a signal V ( vb ), and then the signal V ( vb ) is amplified to obtain a signal V ( vc ), and then the signal V ( vc ) is obtained. The signal V ( vc ) is rectified to obtain the signal V ( vout ), and V ( vout ) is output.

In the embodiment of the present invention, when the terminal device supporting fast charging is inserted into the adapter, the periodic square wave signal as described above is generated, so the flag detecting unit is designed on the adapter side to notify the adapter that the insertion is fast. The charged terminal device is also a terminal device that does not support fast charging, thereby instructing the adapter to perform high voltage charging or charging in a normal manner.

If the first main control unit detects the high level signal sent by the flag detecting unit, the control voltage conversion unit charges the mobile terminal according to the set fast charging mode (eg, 10V, 1.5A); if the The high level signal controls the voltage conversion unit to charge the mobile terminal in a standard charging mode (eg, 5V, 1.5A).

The voltage conversion unit converts the 220V mains to a 5V or 10V charging voltage based on the control of the first main control unit; meanwhile, the voltage conversion unit is further configured to provide 5V power to the flag detecting unit.

The mains interface is a 220V mains input interface.

Based on the above principle, FIG. 9 is a flow chart of a charging management method according to Embodiment 5 of the present invention; and the charging management process of the embodiment of the present invention is described in detail below with reference to FIG.

In this embodiment, the mobile terminal is divided into two types, namely, a mobile terminal that supports fast charging and a mobile terminal that does not support fast charging, as shown in FIG.

Step 901 to step 902: The adapter is inserted into the mobile terminal or the USB data cable is inserted into the mobile terminal. End, the mobile terminal determines whether the DM, DP is shorted, if the result of the determination is yes, step 903 to step 904; if the result of the determination is no, step 905;

Step 903~Step 904: The USB data cable is plugged into the computer. The USB interface is powered, and 5V, 500MA is charged, or data communication is performed.

Step 905~Step 906: The adapter is plugged into the mains supply. For the mobile terminal that supports fast charging, a periodic waveform is added to the DP signal line. The periodic waveform is ΙΟΚΗζ, the amplitude is about 3V, and the duty cycle is 50%. Square wave; for mobile terminals that do not support fast charging, no processing is performed.

Step 907: The adapter side detects whether there is a periodic waveform on the DP signal line. If it is detected, perform steps 908 to 909; if not, perform steps 910 to 911.

Step 908 to step 909: If a periodic waveform is detected, the mobile terminal is a mobile terminal that supports fast charging, and the adapter knows that it is charging a mobile terminal that supports fast charging, and provides a fast charging mode of 10V, 1.5A to the Mobile terminal charging.

Step 910~Step 911: If the periodic square wave is not detected, the mobile terminal is a mobile terminal that does not support fast charging. The adapter knows that it is charging for a mobile terminal that does not support fast charging, and cannot use 10V, 1.5A fast charging. The mode charges the mobile terminal that does not support fast charging, and uses the standard charging mode of 5V, 1.5A to charge the mobile terminal that does not support fast charging.

In summary, it can be seen that the embodiment of the present invention provides an ingenious charging management method, so that the adapter can identify mobile terminals supporting different charging modes, for example, a mobile terminal supporting fast charging, using 10V, 1.5A (of course, if The charging chip can withstand higher voltages, the current output of the adapter can be increased to higher voltage, current) charging, and if other mobile terminals are plugged in, use 5V, 1.5A charging. Embodiments of the present invention can implement charging and data transmission using a universal data line, an adapter and a standard MICRO USB interface (which can also use other standard USB interfaces). More importantly, this adapter can provide mobile support for fast charging. The terminal is quickly charged, and can also charge other mobile terminals that do not support fast charging. In summary, the simple embodiment of the present invention realizes that the specific mobile terminal can be quickly charged without greatly increasing the dedicated charging interface, thereby greatly shortening the charging time (about 50% or less) and improving product competition. Force, and can guarantee the charging of non-specific terminal products under the condition of safety. At the same time, the charging management method provided by the embodiment of the invention has the advantages of simple circuit design, small size, stable function and the like.

10 is a structural block diagram of a charging management system according to Embodiment 6 of the present invention. As shown in FIG. 10, an embodiment of the present invention further provides a charging management system, where the system includes the adapter according to Embodiment 3, and an embodiment. The mobile terminal described in four.

The adapter includes: a flag detecting unit 310, a first main control unit 320, and a voltage converting unit 330, wherein:

The flag detecting unit 310 is configured to detect whether the fast charging identifier sent by the mobile terminal power management unit 420 is received after the adapter accesses the mobile terminal, and send the detection result to the first main control unit 320;

The mobile terminal includes: a second main control unit 410, a power management unit 420, and a charging unit 430, where:

The second main control unit 410 is configured to send an adapter access indication message to the power management unit when detecting the adapter access; preferably, the fast charging identifier preferably has a frequency of 10 kHz, an amplitude of 3 V, and a duty The ratio is 50% of the periodic square wave.

The charging unit 430 is configured to charge the battery according to the power provided by the voltage conversion unit 330 of the adapter.

In the system, the mobile terminal supporting fast charging automatically sends an identifier to the adapter when detecting the adapter access, and determines whether the access is determined by determining whether the fast charging identifier is detected on the adapter side. The mobile terminal supporting fast charging is charged with the corresponding type of mobile terminal in different modes according to the judgment result. It can be seen that the system described in the embodiment of the present invention can quickly charge a specific mobile terminal without significantly increasing the dedicated charging interface, greatly shorten the charging time (about 50% or less), and improve product competitiveness. Charging non-specific terminal products while ensuring safety. At the same time, the charging management system of the invention has the advantages of simple circuit design, small size and stable function.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the present invention belong to the present invention The present invention is also intended to cover such modifications and variations within the scope of the appended claims. Industrial applicability

In the embodiment of the present invention, the adapter detects whether the mobile terminal sends a fast charging identifier, and the adapter uses the fast charging mode or the standard charging mode to charge the mobile terminal according to different judgment results, thereby realizing that the dedicated charging interface is not added. It can not only quickly charge a specific mobile terminal, greatly shorten the charging time, improve the competitiveness of the product, but also ensure the charging of non-specific terminal products under the condition of safety, which can improve the versatility of the adapter.

Claims

claims

1. A charging management method, the method includes:

When the adapter is connected to the mobile terminal, it determines whether it detects the fast charging identifier issued by the mobile terminal. If so, it charges the mobile terminal based on the preset fast charging mode; otherwise, the standard charging mode is The mobile terminal is charged.

2. The method according to claim 1, wherein the fast charging mode is a charging mode in which charging parameters are higher than standard charging parameters; the fast charging identifier is a frequency of 10KHz, an amplitude of 3V, and a duty cycle of 50 % periodic square wave.

3. A charging management method, the method includes:

When a mobile terminal that supports fast charging detects that the adapter is connected, it sends a fast charging identifier to the adapter side and charges the battery according to the power provided by the adapter.

4. The method according to claim 3, wherein the mobile terminal accesses the adapter through a USB interface, and outputs the fast charging identifier to the positive DP signal line of the USB data line of the USB interface. on, sending the fast charging identifier to the adapter.

5. The method according to claim 4, wherein when a device is connected to the USB interface, the mobile terminal applies a fixed voltage to the DP signal line of the USB interface, and detects the USB signal line of the USB interface. Check whether the voltages on the negative DM signal line and the DP signal line of the data line are the same. If they are the same, it is determined that the adapter is connected.

6. An adapter, the adapter supports fast charging, the adapter includes: a flag detection unit configured to detect whether a fast charging identifier issued by the mobile terminal is received after the adapter is connected to the mobile terminal, and will detect The result is sent to the first main control unit; the first main control unit is configured to send a fast charging instruction message to the voltage conversion unit when the detection result is that the fast charging identifier is received; otherwise, send a standard charging message to the voltage conversion unit instruction message;

a voltage conversion unit configured to, upon receiving the fast charging instruction message, based on the preset charge the mobile terminal in the fast charging mode; after receiving the standard charging instruction message, charge the mobile terminal based on the standard charging mode.

7. The adapter according to claim 6, wherein,

The flag detection unit is configured to detect whether a periodic square wave with a frequency of 10KHz, an amplitude of 3V, and a duty cycle of 50% issued by the mobile terminal is received after the adapter is connected to the mobile terminal; the voltage conversion The unit is configured to charge the mobile terminal based on a preset charging mode in which the charging parameters are higher than the standard charging parameters when receiving the fast charging instruction message.

8. The adapter according to claim 7, wherein the flag detection unit is further configured to, when detecting the fast charging identifier, convert the identifier into a high-level signal, and convert the high-level signal into a high-level signal. The level signal is sent to the first main control unit as a detection result of receiving the fast charging identifier.

9. A mobile terminal, the mobile terminal supports fast charging, and the mobile terminal includes: a second main control unit configured to send an adapter access indication message to the power management unit when adapter access is detected;

The power management unit is configured to send a fast charging identifier to the adapter after receiving the adapter indication message;

A charging unit configured to charge the battery according to the power provided by the adapter.

10. The mobile terminal according to claim 9, wherein the second main control unit is configured to realize charging by outputting the fast charging identifier to a DP signal line connected to the USB interface of the adapter. The adapter sends the fast charging identifier.

11. The mobile terminal according to claim 10, wherein the second main control unit is further configured to apply a fixed voltage to the DP signal line of the USB interface when a device is connected to the USB interface, And detect whether the voltages on the DM signal line and DP signal line of the USB interface are the same. If they are the same, it is determined that the adapter is connected.

12. A charging management system, said system comprising the battery according to any one of claims 6 to 8 adapter, and comprising the mobile terminal according to any one of claims 9 to 11.