CN110212596A - A kind of charging equipment and the communication means that charges - Google Patents

Abstract

The embodiment of the invention provides a kind of charging equipment and charging communication means, wherein, charging equipment includes charging port, communication module and micro-control unit, charging port is for being electrically connected charging load and including power end and data terminal, for power end for providing charge power supply, data terminal is used for transmission data-signal；Communication module is electrically connected with data terminal and micro-control unit respectively, and data terminal is also used to receive the level signal of characterization charging load rated charging voltage；Communication module is used to generate encoded information according to level signal, and encoded information is sent to micro-control unit；Micro-control unit and data terminal are electrically connected to execute data communication according to the encoded information and the charging load.It using the embodiment of the present invention, may be implemented to carry out Charge Management to charging load, it is ensured that the safety of charging load charging.

Description

Charging device and charging communication method

technical field

The invention relates to the field of electronic technology, in particular to a charging device and a charging communication method.

Background technique

With the development of the times, terminal equipment is also constantly developing and improving, and the safety of terminal equipment has attracted more and more attention. Among them, charging safety is particularly important. For example, accidents such as explosions of terminal equipment used as charging loads during charging are serious Caused by improper charging. In order to ensure the charging safety of the terminal device, a common method is to select a matching charging device when charging the terminal device.

However, in many cases, it is difficult to determine whether the charging device used matches the terminal device, and in this way, there are hidden dangers to the safety of the terminal device. Therefore, when charging, how to select a suitable charging device for the terminal device to charge it has become a hot issue in current research.

Contents of the invention

Embodiments of the present invention provide a charging device and a charging communication method, which can realize charging management of a charging load and ensure the safety of charging the charging load.

In the first aspect, an embodiment of the present invention provides a charging device, including a charging port, a communication module, and a micro-control unit. The charging port is used to electrically connect a charging load and includes a power terminal and a data terminal, and the power terminal is used to provide charging power. , the data terminal is used to transmit data signals;

The communication module is electrically connected to the data terminal and the micro control unit respectively, and the data terminal is also used to receive a level signal representing the rated charging voltage of the charging load;

The communication module is used to generate coded information according to the level signal, and send the coded information to the micro control unit;

The micro control unit is electrically connected to the data terminal to perform data communication with the charging load according to the coded information.

Optionally, the data communication includes: the micro control unit generates charging prompt information according to the received coded information, and sends the charging prompt information to the data terminal, and the data terminal is also used to The charging prompt information is sent to the charging load.

Optionally, the charging device also includes a charging circuit,

The charging circuit is electrically connected to the power supply terminal, and the charging circuit provides power to the charging load through the power supply terminal to charge the charging load;

The micro-control unit is electrically connected to the charging circuit, and when the micro-control unit receives the charging response information sent by the charging load in response to the charging prompt information, controls the charging circuit based on the charging response information A charging voltage matching the rated charging voltage is provided to charge the charging load.

Optionally, the communication module includes an emitter follower, a voltage comparator and an encoder,

The emitter follower is electrically connected to the data terminal, and the emitter follower is used to receive the level signal;

The emitter follower is also electrically connected to the voltage comparator, and transmits the received level signal to the voltage comparator;

The voltage comparator is electrically connected to the encoder, and the voltage comparator is used to compare the level signal with a reference voltage and send the comparison result to the encoder, wherein the reference The voltage represents the rated output voltage provided by the charging device;

The encoder performs encoding processing on the comparison result to obtain the encoding information.

Optionally, the data terminal includes a first data pin and a second data pin that cooperate with each other to transmit data signals, and the first resistor is electrically connected to the first data pin and the second data pin Between, the power terminal includes a power pin and a ground pin, the power pin and the ground pin are respectively electrically connected to the charging circuit to charge the charging load,

The first data pin is electrically connected to the emitter follower for sending the received level signal to the emitter follower,

The first data pin is electrically connected to the MCU for receiving the charging prompt information sent by the MCU, and sending the charging prompt information to the charging load for performing data communication. In a second aspect, an embodiment of the present invention provides a charging communication method, including:

When the charging device is electrically connected to the charging load through the charging port, the charging device receives a level signal representing the rated voltage of the charging load through the data terminal of the charging port;

The charging device generates coded information according to the level signal;

The charging device performs data communication with the charging load through the data terminal according to the coded information.

Optionally, the charging device includes an emitter follower, a voltage comparator, and an encoder, and the charging device generates coded information according to the level signal, including:

The charging device obtains the level signal received by the data port through the emitter follower, and transmits the level signal to a voltage comparator;

The charging device compares the level signal with a reference voltage through the voltage comparator, obtains a comparison result, and transmits the comparison result to the encoder, and the reference voltage represents the voltage provided by the charging device. Rated output voltage;

The charging device encodes the comparison result received by the encoder through the encoder to obtain encoded information.

Optionally, the charging device performs data communication with the charging load through the data terminal according to the encoding information, including:

The charging device generates charging prompt information according to the coded information, and sends the charging prompt information to the charging load through the data terminal, and the charging prompt information is the same as the rated voltage of the charging load and the charging load. The size relationship of the rated output voltage provided by the charging device is used to facilitate the charge management of the charging load by the charging load according to the size relationship.

Optionally, the charging device also includes a charging circuit, and the method also includes:

When receiving the charging response information sent by the charging load in response to the charging prompt information, the charging device determines a charging voltage that matches the rated voltage responsible for charging according to the charging response information;

The charging device charges the charging load with the charging voltage through the charging circuit.

Optionally, the charging port of the charging device includes the data end and a power end, the data end includes a first data pin and a second data pin, and the power end includes a power pin and a ground pin, The charging device receives a level signal representing the rated voltage of the charging load through the data terminal of the charging port, including:

The charging device receives a level signal representing the rated voltage of the charging load through the first data pin of the data terminal;

The charging device charges the charging load with the charging voltage through the charging circuit, including:

The charging device outputs the charging voltage through the power supply terminal to charge the charging load.

In the embodiment of the present invention, the charging device includes a charging port, a communication module, and a micro-control unit. The charging port is used to electrically connect the charging load and includes a power terminal and a data terminal. The power terminal is used to provide charging power, and the data terminal is used to transmit data. signal; the communication module is electrically connected to the data terminal and the micro control unit respectively, and the data terminal is also used to receive the level signal representing the rated charging voltage of the charging load; the communication module is used to generate coded information according to the level signal and send the coded information to To the micro control unit; the micro control unit is electrically connected to the data terminal to perform data communication with the charging load according to the coded information, so as to realize charging management of the charging load and ensure the safety of charging the charging load.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a charging device provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an emitter follower provided by an embodiment of the present invention;

Fig. 3 is a schematic flowchart of a charging communication method provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

At present, with the development of technology, the charging management of the charging load is becoming more and more important. When the charging load is charging, the charging voltage and/or current can be managed to ensure the safety of charging. In order to realize charging management when charging a charging load, an embodiment of the present invention provides a charging device that can communicate with the charging load and charge the charging load according to a charging instruction of the charging load.

Referring to FIG. 1, it is a schematic structural diagram of a charging device provided by an embodiment of the present invention. The charging device 100 shown in FIG. It can be seen from the figure that the charging port 101 is electrically connected to the communication module 102 , the communication module 102 is electrically connected to the micro control unit 103 , and the micro control unit 103 is electrically connected to the charging port 101 .

Among them, the charging port 101 is used to electrically connect the charging load 200. The charging load 200 refers to devices that need to be charged, such as mobile phones, tablets, notebook computers, and wearable devices. The charging port 101 can include power terminals and data terminals. It is mainly used to provide power, and the data terminal is mainly used to transmit data signals, that is, to communicate information between the transmission and the charging load. In this embodiment, the charging port 101 may be a USB3.0 interface, and in other embodiments of the present invention, the charging port 101 may also be other types of interfaces.

Specifically, the data terminal includes the first data pin represented by DP and the second data pin represented by DM, DP and DM are connected through the first resistor R1, and the power terminal includes the power pin represented by VDD and the ground pin represented by GND , VDD and GND are respectively electrically connected to the charging circuit. Wherein, the first resistor R1 is connected between DP and DM, R1 can be set to 200 ohms, this kind of connection can make when the charging device is electrically connected with the charging load, the charging load can set the charging device as a dedicated charging port.

In one embodiment, the communication module 102 further includes an emitter follower 1021 , a voltage comparator 1022 and an encoder 1023 . It can be understood that the emitter follower 1021, the voltage comparator 1022 and the encoder 1023 in the communication module 102 constitute the session request protocol circuit (Session Request Protocol circuit, SRP) in the charging device 100, and the SRP is improved by improving the hardware solution The charging management device can communicate with the charging load at a minimum cost, thereby making the charging management more accurate.

In one embodiment, the first data pin DP is electrically connected to the emitter follower 1021, the first data pin DP is used to receive the level signal representing the rated voltage of the charging load sent by the charging load 200, and will receive The received level signal is sent to the emitter follower 1021, and the emitter follower 1021 receives the level signal received by the first data pin DP.

Among them, the rated voltage of the charging load refers to the voltage that can be used to charge the charging load. Some charging loads support two rated voltages. For example, the rated voltage of a mobile phone device is 5V and 9V, and some charging loads only support one rated voltage. Voltage. Optionally, the charging device 100 can preset the corresponding relationship between the level signal used to characterize the rated voltage of the charging load and the rated charging voltage. For example, when the rated voltage of the charging load is 5V, the level signal It is 3V, or when the rated voltage of the charging load is 5V, the level signal is 1V.

In one embodiment, the first data pin DP can receive the level signal sent by the charging load 200 in the following manner: when an electrical connection with the charging load 200 is detected, the first data pin DP sends a charging signal to the charging load 200. The load 200 sends a charging parameter request, which may include the rated voltage of the charging load; the charging load 200 generates a level signal according to the rated voltage of the charging load, and sends the level signal to the first data pin DP of the charging device . It should be understood that since the data terminal is used to transmit data signals, the voltage that the data terminal can transmit is limited. In order to ensure the validity and accuracy of data transmission, the charging load sends to the data terminal the rated The level signal of the voltage, not the rated voltage of the charging load.

In one embodiment, the emitter follower 1021 is electrically connected to the voltage comparator 1022, and the emitter follower 1021 inputs the obtained level signal to the voltage comparator 1022; the voltage comparator 1022 is electrically connected to the encoder 1023 , the voltage comparator 1022 is used to compare the received level signal with the reference voltage used to characterize the rated output voltage provided by the charging device, obtain the comparison result, and send the comparison result to the encoder 1023; the encoder 1023 compares The result is coded to obtain coded information.

In one embodiment, the encoder 1023 is electrically connected to the micro control unit 103, and the encoder 1023 transmits the obtained encoded information to the micro control unit 103, and the micro control unit 103 generates charging prompt information according to the encoded information. The micro control unit 103 is electrically connected to the first data pin DP, the micro control unit 103 sends the generated charging prompt information to the first data pin DP, and the first data pin DP sends the charging prompt information to the charging load 200 . Wherein, the charging prompt information is used to prompt the charging load of the magnitude relationship between the charging device and the rated voltage of the charging load, so that the charging load can perform charging management according to the above magnitude relationship.

In one embodiment, the circuit structure diagram of the emitter follower 1021 used in the communication module 102 in the embodiment of the present invention is shown in FIG. 2 . It can be seen from FIG. 2 that the circuit of the emitter follower 1021 includes four resistors, A triode, the main characteristics of the emitter follower are high input resistance, high efficiency of transmitting signal source signals, low output resistance, strong load capacity, voltage magnification is less than 1 close to 1, and the output voltage is in the same phase as the input voltage, with Following the characteristics, it is widely used as an output stage or an intermediate isolation level in practical applications. When the emitter follower is used as an intermediate isolation stage, it can isolate the front stage and the rear stage, and realize buffering and isolation of mutual interference between the front and rear stages, thereby preventing the output voltage from being affected by the load.

Preferably, the charging device 100 also includes a charging circuit 104, and the micro-control unit 103 is electrically connected to the charging circuit 104. When the micro-control unit 103 receives the charging response information sent by the charging load 200 for the charging prompt information, based on the charging response The information controls the charging circuit to charge the charging load. Wherein, the charging response information may be generated by the charging load after the user confirms the charging operation according to the charging prompt information. The charging circuit 104 is electrically connected to the power pin VDD, and the charging circuit provides power to the charging load through the power pin VDD to charge the charging load.

In one embodiment, if the charging load 200 determines that the rated voltage of the charging load is lower than the rated output voltage provided by the charging device according to the charging prompt information, the charging load 200 can display the charging prompt information on the user interface so that the user can input the charging prompt information according to the charging prompt information. Operation, if the charging load 200 receives the operation of determining the charging input by the user, the charging load 200 generates charging response information according to the operation of confirming charging, and sends the charging response information to the charging device 100; the micro control unit 103 in the charging device 100 receives After receiving the charging response information, the step-down module in the charging device 100 can be notified to reduce the voltage provided by the charging circuit 104 to match the rated voltage of the charging load, and then use the charging circuit 104 to supply the charging load with a voltage that matches the charging load. to charge. Optionally, if the rated voltage of the charging load is lower than the rated output voltage provided by the charging device, the charging prompt information is used to indicate that there may be safety hazards if the charging device is used to charge the charging load.

It should be understood that due to the potential safety hazards of charging a lower charging load through a higher voltage charging device, the charging device 100 controls the charging circuit 104 to charge the charging load with a voltage that matches the charging load 200 through the step-down process. , to send charging prompt information to the charging load 200, which helps the charging load user to judge whether to use the charging device to continue charging according to the actual situation. In other words, if the user has other available charging devices, he can choose a more suitable charging device Charging the charging load, in this way, it is convenient to manage the charging of the charging load and ensure the charging safety of the charging load.

In one embodiment, if the charging load 200 determines that the rated voltage of the charging load is greater than the rated output voltage provided by the charging device according to the charging prompt information, the charging load can display the charging prompt information on the user interface so that the user can input the operation according to the charging prompt information. , if the charging load 200 receives the operation of confirming charging input by the user, the charging load 200 generates charging response information according to the operation of confirming charging, and sends the charging response information to the charging device 100 . After receiving the charging response information, the micro control unit 103 in the charging device 100 can notify the charging device 100 to use the rated output voltage provided by the charging device as the charging voltage, and the charging circuit 104 charges the charging load with the charging voltage. Optionally, when the rated voltage of the charging load is greater than the rated output voltage provided by the charging device, the charging prompt information may be used to inform the user that it will take more time to charge the charging load if the charging device is selected.

It should be understood that since the rated output voltage provided by the charging device is lower than the rated voltage of the charging load, it may take a long time to charge the charging complex using the charging device at this time, so the rated output voltage provided by the charging device in the charging circuit Sending a charging prompt message to the charging load before charging the charging load helps the user of the charging load determine whether to continue charging according to the actual situation, thus improving user experience.

In the embodiment of the present invention, the charging device 100 includes a charging port 101, a communication module 102, and a micro-control unit 103. The charging port 101 is used to electrically connect a charging load and includes a power terminal and a data terminal. The power terminal is used to provide charging power, data The terminal is used to transmit data signals; the communication module 102 is electrically connected to the data terminal and the micro control unit respectively, and the data terminal is also used to receive the level signal representing the rated charging voltage of the charging load; the communication module 102 is used to generate codes according to the level signal information, and send the coded information to the micro control unit 103; the micro control unit 103 is electrically connected to the data terminal to perform data communication with the charging load according to the coded information, realizing the communication between the charging device and the charging load, It is beneficial to charge management of the charging load and ensure the safety of charging the charging load.

Referring to FIG. 3 , it is a charging communication method provided by an embodiment of the present invention. The charging communication method shown in FIG. 3 can be applied to the charging device shown in FIG. 1 , and the charging communication method can be executed by the charging device. The charging communication method shown in FIG. 3 may include the following steps:

Step S401, when the charging device is electrically connected to the charging load through the charging port, the charging device receives a level signal representing the rated voltage of the charging load through the data terminal of the charging port.

In one embodiment, the level signal is a signal used to characterize the rated voltage of the charging load, or there is a corresponding relationship between the level signal and the rated voltage of the charging load, and the level signal is the rated voltage of the charging load according to a certain rule The reason why the charging load sends a level signal representing the rated voltage of the charging load to the charging device instead of directly sending the rated voltage to the charging device is that the data terminal in the charging port of the charging device can only Smaller voltages are transmitted, but larger voltages cannot be transmitted. The charging load can preset the corresponding relationship between the level signal and the rated voltage. For example, assuming that the rated voltage of the charging load is 5V, the level signal corresponding to the rated voltage can be set to 3V, 2V or 1V. The specific corresponding relationship between the rated voltage and the level signal is not limited in this embodiment of the present invention.

In an embodiment, the level signal received by the charging device may be received by the charging load when an electrical connection with the charging device is detected. The established electrical connection between the charging load and the charging device means that the charging device is connected to AC power, and the charging port of the charging load is connected to the data terminal of the charging port of the charging device through a data cable.

In one embodiment, the data terminal in the charging port is mainly used for data transmission, the data terminal may include a first data pin and a second data pin, the first data pin may be denoted as DP, and the second data pin may be Denoted as DM, the above-mentioned charging device receives the level signal sent by the charging load through the data terminal of the charging port. In essence, it receives the level signal sent by the charging load through the first data pin of the data terminal, or it can be through the second pin of the data terminal. feet to receive. Normally, if a high-speed level signal is detected, it can be received through the first data pin, and if a low-speed level signal is detected, it can be received through the second data pin. In one embodiment, the power terminal of the charging port may include a power pin and a ground pin, the power pin is used to provide a charging voltage for the charging load, and the ground pin is used for grounding.

In one embodiment, the first data pin and the second data pin included in the data terminal are electrically connected through a resistor, so that when the charging load is connected to the charging device, the charging load detects the voltage connected to the charging device. A dedicated charging port, or in other words, allows the charging load to detect that the connected device is a charging device.

In an embodiment, the way for the charging device to receive the level signal sent by the charging load can be as follows: after the connection is established, the charging device can send a charging parameter request to the charging load through the data terminal, and the charging parameter request is used to instruct the charging load to The charging device sends the rated voltage of the charging load. In other embodiments, the charging parameter request can also be used to instruct the charging load to send the rated current of the charging load to the charging device; after receiving the charging parameter request sent by the charging device, the charging load obtains the charging load The rated voltage, and determine the level signal used to characterize the rated voltage according to the rated voltage, and send the level signal to the data terminal of the charging device.

Step S402, the charging device generates coded information according to the level signal.

In an embodiment, the way for the charging device to generate coded information according to the level signal may be as follows: the charging device compares the level signal with a reference voltage to obtain the comparison result, and then encodes the comparison result to obtain the coded information . In one embodiment, the reference voltage is used to characterize the rated output voltage provided by the charging device, that is to say, the reference voltage and the rated output voltage provided by the charging device are in a corresponding relationship. It should be noted that, in order to make the charging load accurately The charging load performs charging management. Here, the rules for setting the relationship between the reference voltage and the rated output voltage provided by the charging device need to be the same as the above-mentioned rules for setting the level signal and the rated voltage of the charging load. For example, if the rule for setting the corresponding relationship between the level signal measured by the terminal and the rated voltage of the charging load can be: the level signal corresponding to the rated voltage of 5V is 1V, then set the reference voltage on the charging device side and the rated output provided by the charging device The rule of the voltage correspondence is also: the reference voltage corresponding to the rated output voltage provided by the charging device is 5V is also 1V.

It should be understood that by comparing the level signal with the reference voltage, the magnitude relationship between the rated voltage of the charging load and the voltage that can be provided by the charging device can be known.

Specifically, the charging device may include an emitter follower, a voltage comparator, and an encoder. Among them, the main characteristics of the emitter follower are high input resistance, high efficiency of transmitting signal source signals, low output resistance, strong load capacity, and high voltage The magnification is less than 1 and close to 1, and the output voltage is in the same phase as the input voltage, and has following characteristics. It is widely used as an output stage or an intermediate isolation level in practical applications. When the emitter follower is used as an intermediate isolation stage, it can isolate the front stage and the rear stage, and realize buffering and isolation of mutual interference between the front and rear stages, thereby preventing the output voltage from being affected by the load. The voltage comparator can compare the two voltages input to it, and the comparison result is represented by a high or low level. Specifically, if the rated voltage of the charging load is greater than the reference voltage in the embodiment of the present invention, it can output a high level or a low level. Level, if the rated voltage of the charging load is less than the reference voltage of the charging device, it can output low level or high level. Encoders encode analog information into digital information.

In an embodiment, the charging device can generate coded information according to the level signal as follows: the charging device obtains the level signal received by the data terminal through an emitter follower, and transmits the level signal to the voltage comparator; The device compares the level signal with the reference voltage through the voltage comparator to obtain the comparison result, and transmits the comparison result to the encoder; the charging device encodes the received comparison result through the encoder to obtain the encoded information. It should be understood that the comparison result output by the voltage comparator is analog level information, and the information that can be transmitted between the charging device and the charging load is digital information, and the original analog level information is converted into data by encoding the comparison result through the encoder. Information, that is, coded information, can enable communication between the charging device and the charging load.

Step S403, the charging device performs data communication with the charging load through the data terminal according to the coded information.

In one embodiment, the charging device performs data communication with the charging load through the data terminal according to the coded information, including: the charging device generates charging prompt information according to the coded information, and sends the charging prompt information to the charging load through the data terminal, and the charging prompt information charges Load the magnitude relationship between the rated voltage of the charging load and the rated output voltage provided by the charging equipment, so that the charging load can charge and manage the charging load according to the magnitude relationship.

In one embodiment, the charging prompt information is used to remind the charging load of the magnitude relationship between the rated output voltage provided by the charging device and the rated voltage of the charging load, so that the charging load can perform the next step of charging control according to the magnitude relationship. The charging load can display the received charging prompt information on the user interface, so that the user can input the indication operation whether to continue charging according to the size relationship. Further, the charging load can determine whether to send charging response information to the charging device according to the indication operation input by the user. . If the charging load receives the user's confirmation of the charging operation, the charging load can send a charging response message to the charging device so that the charging device can charge the charging load; if the charging load receives the user's cancellation of the charging operation, the charging load can not send a charging response to the charging device information.

In one embodiment, the charging device further includes a charging circuit. When the charging device receives charging response information sent by the charging load in response to the charging prompt information, the charging device determines a charging voltage that matches the rated voltage of the charging load according to the charging response information; Charge the charging load with the charging voltage through the charging circuit.

In one embodiment, if the charging load determines that the rated voltage of the charging load is lower than the rated output voltage provided by the charging device according to the charging prompt information, the charging load can display the charging prompt information on the user interface so that the user can input instructions according to the charging prompt information. , if the charging load receives the determined charging operation input by the user, the charging load generates charging response information according to the confirmed charging operation, and sends the charging response information to the charging device; after the charging device receives the charging response information, it can notify the charging device to step down The module reduces the voltage provided by the charging circuit to match the rated voltage of the charging load, and then charges the charging load with a voltage that matches the charging load through the charging circuit. Optionally, if the rated voltage of the charging load is lower than the rated output voltage provided by the charging device, the charging prompt information is used to indicate that there may be safety hazards if the charging device is used to charge the charging load.

It should be understood that because there is a safety hazard in charging a lower charging load through a charging device with a higher voltage, the charging device will charge the charging load with a voltage that matches the charging load before the charging device controls the charging circuit to charge the charging load with a voltage that matches the charging load. The load sends charging prompt information to help the charging load user judge whether to use the charging device to continue charging according to the actual situation. In other words, if the user has other available charging devices, he can choose a more suitable charging device for the charging load. Charging, in this way, it is convenient to charge and manage the charging load, ensuring the charging safety of the charging load.

In one embodiment, if the charging load determines that the rated voltage of the charging load is greater than the rated output voltage provided by the charging device according to the charging prompt information, the charging load can display the charging prompt information on the user interface so that the user can input instructions according to the charging prompt information. , if the charging load receives a confirmation charging operation input by the user, the charging load generates charging response information according to the charging confirmation operation, and sends the charging response information to the charging device. After receiving the charging response information, the charging device can notify the charging device to use the rated output voltage provided by the charging device as the charging voltage, and the charging circuit uses the charging voltage to charge the charging load. Optionally, when the rated voltage of the charging load is greater than the rated output voltage provided by the charging device, the charging prompt information may be used to inform the user that it will take more time to charge the charging load if the charging device is selected.

For example, suppose the rated voltage of the charging load is 5V, and the maximum voltage that the charging device can provide is 9V. When the connection between the charging device and the charging load is established, the charging device sends a charging parameter acquisition request to the charging load, and then the charging load Send a level signal to the charging device, and the charging device compares the level signal with the reference voltage to obtain the comparison result; generates a charging prompt message based on the comparison result and sends it to the charging load, and the charging load can know the rated voltage from the charging prompt message The relationship between the magnitude and the rated output voltage provided by the charging device, and display the magnitude relationship to the user. If the user wants to continue using the charging device to charge the charging load, the user inputs to confirm the charging operation, and then the charging load notifies the charging device to reduce the 9V to 5V to charge the charging load.

In the embodiment of the present invention, when the charging device is electrically connected to the charging load through the charging port, the charging device receives the level signal sent by the charging load, and can generate coded information according to the level signal, and further the charging device passes the data The terminal performs data communication with the charging load according to the coded information, so as to manage the charging load and ensure the safety of charging the charging load.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. , may include the flow of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), and the like.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand all or part of the process for realizing the above embodiments, and according to the rights of the present invention The equivalent changes required still belong to the scope covered by the invention.

Claims (10)

1. A charging device, characterized in that it includes a charging port, a communication module and a micro-control unit, the charging port is used to electrically connect a charging load and includes a power supply terminal and a data terminal, and the power supply terminal is used to provide charging power , the data terminal is used to transmit data signals; The communication module is electrically connected to the data terminal and the micro control unit respectively, and the data terminal is also used to receive a level signal representing the rated charging voltage of the charging load; The communication module is used to generate coded information according to the level signal, and send the coded information to the micro control unit; The micro control unit is electrically connected to the data terminal to perform data communication with the charging load according to the coded information. 2. The charging device according to claim 1, wherein the data communication comprises: the micro control unit generates charging prompt information according to the received coded information, and sends the charging prompt information to the The data terminal is also used to send the charging prompt information to the charging load. 3. The charging device according to claim 2, characterized in that the charging device further comprises a charging circuit, The charging circuit is electrically connected to the power supply terminal, and the charging circuit provides power to the charging load through the power supply terminal to charge the charging load; The micro-control unit is electrically connected to the charging circuit, and when the micro-control unit receives the charging response information sent by the charging load in response to the charging prompt information, controls the charging circuit based on the charging response information A charging voltage matching the rated charging voltage is provided to charge the charging load. 4. The charging device according to claim 3, wherein the communication module comprises an emitter follower, a voltage comparator and an encoder, The emitter follower is electrically connected to the data terminal, and the emitter follower is used to receive the level signal; The emitter follower is also electrically connected to the voltage comparator, and transmits the received level signal to the voltage comparator; The voltage comparator is electrically connected to the encoder, and the voltage comparator is used to compare the level signal with a reference voltage and send the comparison result to the encoder, wherein the reference The voltage represents the rated output voltage provided by the charging device; The encoder performs encoding processing on the comparison result to obtain the encoding information. 5. The charging device according to claim 4, wherein the data terminal includes a first data pin and a second data pin that cooperate with each other to transmit data signals, and the first resistor is electrically connected to the first Between a data pin and the second data pin, the power terminal includes a power pin and a ground pin, and the power pin and the ground pin are respectively electrically connected to the charging circuit for the The charging load described above is charged, The first data pin is electrically connected to the emitter follower for sending the received level signal to the emitter follower; The first data pin is electrically connected to the MCU for receiving the charging prompt information sent by the MCU, and sending the charging prompt information to the charging load for performing data communication. 6. A charging communication method, characterized in that, comprising: When the charging device is electrically connected to the charging load through the charging port, the charging device receives a level signal representing the rated voltage of the charging load through the data terminal of the charging port; The charging device generates coded information according to the level signal; The charging device performs data communication with the charging load through the data terminal according to the coded information. 7. The method according to claim 6, wherein the charging device includes an emitter follower, a voltage comparator and an encoder, and the charging device generates coded information according to the level signal, including: The charging device obtains the level signal received by the data terminal through the emitter follower, and transmits the level signal to a voltage comparator; The charging device compares the level signal with a reference voltage through the voltage comparator, obtains a comparison result, and transmits the comparison result to the encoder, and the reference voltage represents the voltage provided by the charging device. Rated output voltage; The charging device encodes the comparison result received by the encoder through the encoder to obtain encoded information. 8. The method according to claim 7, wherein the charging device performs data communication with the charging load through the data terminal according to the encoding information, comprising: The charging device generates charging prompt information according to the encoded information, and sends the charging prompt information to the charging load through the data terminal, and the charging prompt information is the same as the rated voltage of the charging load and the charging load. The magnitude relationship of the rated output voltage provided by the charging device is used to facilitate the charging load to manage the charging of the charging load according to the magnitude relationship. 9. The method according to claim 8, wherein the charging device further comprises a charging circuit, and the method further comprises: When receiving the charging response information sent by the charging load in response to the charging prompt information, the charging device determines a charging voltage that matches the rated voltage of the charging load according to the charging response information; The charging device charges the charging load with the charging voltage through the charging circuit. 10. The method according to claim 9, wherein the charging port of the charging device includes the data terminal and a power supply terminal, the data terminal includes a first data pin and a second data pin, and the The power supply terminal includes a power supply pin and a ground pin, and the charging device receives a level signal representing the rated voltage of the charging load through the data terminal of the charging port, including: The charging device receives a level signal representing the rated voltage of the charging load through the first data pin of the data terminal; The charging device charges the charging load with the charging voltage through the charging circuit, including: The charging device outputs the charging voltage through the power supply terminal to charge the charging load.