CN106849263B - Power supply equipment, power supply system and power supply method - Google Patents
Power supply equipment, power supply system and power supply method Download PDFInfo
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- CN106849263B CN106849263B CN201710179289.1A CN201710179289A CN106849263B CN 106849263 B CN106849263 B CN 106849263B CN 201710179289 A CN201710179289 A CN 201710179289A CN 106849263 B CN106849263 B CN 106849263B
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- 238000003912 environmental pollution Methods 0.000 description 3
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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Abstract
The invention discloses power supply equipment, which comprises a power input end, a controllable DC-DC transformation circuit and a USB interface with an OTG function, wherein the USB interface comprises a control end for receiving a control signal of the controllable DC-DC transformation circuit and a voltage output end for outputting charging voltage; the power supply system comprises an intelligent communication terminal, electric equipment and the power supply equipment; a power supply method is also provided. According to the power supply equipment, the USB interface with the OTG function is used for realizing control data transmission, so that the controllable DC-DC transformation circuit is controlled to change the output charging voltage, the charging voltage is controllable, and the compatibility of the power supply equipment to electric equipment is enhanced; the power supply system sends control data of the controllable DC-DC transformation circuit through the intelligent communication terminal, so that the power supply equipment is compatible to supply power to various electric equipment; according to the power supply method, upgrade data of power supply equipment is obtained through the intelligent communication terminal to achieve upgrade, and power is supplied to the power supply equipment by matching with electric equipment.
Description
Technical Field
The invention relates to the field of power supply, in particular to power supply equipment, a power supply system and a power supply method.
Background
Nowadays, many electric devices are needed to be matched with power supply equipment to realize charging, the electric devices take intelligent communication products as examples, in modern society of intelligent communication products such as mobile phone updating and one year replacement, because mobile phones and chargers are generally in one-to-one correspondence and matched use, when the mobile phones are replaced, the power supply equipment of the mobile phones, namely the chargers, are replaced along with the mobile phones, and the replaced chargers become garbage and cannot be reused, so that huge resource waste is caused. And when other mobile phones are used, the charger is not charged because of mismatch, or the charging is very slow or the charging is not full, so that the value of the reutilization of the charger becomes very little. Some of the commercially available chargers are compatible, but are cured in the charger, and although the charger can be charged, the charger is compatible. The mobile phone cannot be matched for quick and optimal charging. In addition, the method can only be compatible with the existing mobile phone, cannot be modified and updated and optimized, and greatly increases the probability of misdiscrimination of the identification IC due to the change of parameters such as voltage, temperature, service life and the like of the charger, and even has an unusable result after a period of use. Other power supply devices, such as mobile power supplies and power adapters, also suffer from the problems described above, and it is therefore necessary to provide a solution.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide power supply equipment which can receive an external control signal to realize controllable charging voltage and has high compatibility, and correspondingly, a power supply system and a power supply method.
The technical scheme adopted by the invention is as follows: the power supply equipment comprises a power input end, a controllable DC-DC transformation circuit and a USB interface with an OTG function, wherein the USB interface comprises a control end for receiving a control signal of the controllable DC-DC transformation circuit and a voltage output end for outputting charging voltage, the power input end is connected with the input end of the controllable DC-DC transformation circuit, the control end is connected with the controllable DC-DC transformation circuit, and the output end of the controllable DC-DC transformation circuit is connected to the voltage output end.
Further, the controllable DC-DC transformation circuit comprises an MCU, a first inductor, a first capacitor, a first diode and a first switch tube; the power input end is connected with the positive output end of the first switching tube, and the control end of the first switching tube is connected with the output end of the MCU; the negative output end of the first switch tube is respectively connected with one end of the first inductor and the negative electrode of the first diode, the positive electrode of the first diode is grounded, the other end of the first inductor is connected with one end of the first capacitor, and the other end of the first capacitor is grounded; the other end of the first inductor is connected with the voltage output end of the USB interface through the negative output end and the positive output end of the second switching tube, the control end of the second switching tube is connected with the output end of the MCU, and the control end of the USB interface is connected with the MCU.
Further, the controllable DC-DC transformation circuit further comprises a third switching tube, a first voltage stabilizing diode and a first resistor, wherein the negative output end of the second switching tube is connected with the input end of the MCU, the control end of the third switching tube is connected with the output end of the MCU, the negative output end of the third switching tube is grounded, the positive output end of the third switching tube is connected with the negative electrode of the first voltage stabilizing diode, the positive electrode of the first voltage stabilizing diode is connected with the negative output end of the second switching tube, one end of the first resistor is connected with the input end of the MCU and the USB interface respectively, the other end of the first resistor is grounded, and one end of the first capacitor is connected with the input end of the MCU.
Further, the controllable DC-DC transformation circuit further comprises a temperature-sensitive resistor, one end of the temperature-sensitive resistor is connected with the input end of the MCU, and the other end of the temperature-sensitive resistor is grounded.
Further, the first switching tube and the second switching tube are PMOS tubes, the third switching tube is an NMOS tube, the grid electrodes of the PMOS tube and the NMOS tube are control ends of the switching tubes, the source electrodes of the PMOS tube and the NMOS tube are negative output ends of the switching tubes, and the drain electrodes of the PMOS tube and the NMOS tube are positive output ends of the switching tubes.
Further, the power supply equipment is a mobile terminal direct charging charger, a power adapter or a mobile power supply
The invention adopts another technical scheme that: the power supply system comprises an intelligent communication terminal, electric equipment and power supply equipment, wherein a power input end of the power supply equipment is connected with a power supply, and the intelligent communication terminal and the electric equipment are respectively connected with a USB interface of the power supply equipment.
Further, the intelligent communication terminal comprises a mobile phone, a notebook computer, an iPAD or a PDA.
Further, the electric equipment comprises an intelligent communication terminal.
Further, the power supply system further comprises a cloud server, the cloud server is used for storing upgrade data of the power supply equipment corresponding to different electric equipment, and the intelligent communication terminal is connected with the cloud server through a network.
The invention adopts another technical scheme that: a power supply method is applied to the power supply system and comprises the following steps:
s1, an intelligent communication terminal acquires equipment information of electric equipment and version information of power supply equipment;
s2, the intelligent communication terminal compares the equipment information of the electric equipment with version information of the power supply equipment to judge whether the power supply equipment supports the quick charge of the electric equipment, if so, the power supply equipment carries out the quick charge of the electric equipment, otherwise, the step S3 is carried out;
and S3, the intelligent communication terminal is connected with the network to acquire upgrade data of the power supply equipment and send the upgrade data to the power supply equipment so as to upgrade the power supply equipment, and then the power supply equipment charges electric equipment rapidly.
Further, the upgrade data includes a fast charging protocol, a charging parameter and a protection parameter of the corresponding electric equipment.
Further, the power supply device performing fast charging on the electric equipment includes:
the power supply equipment judges whether the electric equipment supports quick charging, and if so, the power supply equipment carries out quick charging on the electric equipment according to a quick charging protocol; otherwise, the power supply equipment carries out common charging on the electric equipment according to the charging parameters, and the MCU of the power supply equipment acquires charging current and charging voltage in real time so as to carry out charging current and charging voltage adjustment, thereby realizing charging acceleration.
The beneficial effects of the invention are as follows: according to the power supply equipment, the USB interface with the OTG function is used for realizing control data transmission, so that the controllable DC-DC transformation circuit is controlled to change the output charging voltage, the charging voltage is controllable, the compatibility of the power supply equipment to electric equipment is enhanced, the practicability of the power supply equipment is provided, the power supply equipment can be used repeatedly and reasonably, and the environmental pollution is reduced; according to the power supply system, the intelligent communication terminal is used for sending control data of the controllable DC-DC transformation circuit, so that the power supply equipment is compatible to supply power to various electric equipment; in addition, when the power supply equipment is not matched with the electric equipment, the intelligent communication terminal acquires the upgrade data of the power supply equipment to realize upgrade so as to match the electric equipment to supply power to the electric equipment, so that the compatibility of the power supply equipment is improved, and the realization method is simple and effective.
Drawings
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
fig. 1 is a block diagram of a power supply apparatus according to the present invention;
FIG. 2 is a circuit diagram of one embodiment of a power supply device according to the present invention;
FIG. 3 is a block diagram of a power supply system according to the present invention;
FIG. 4 is a flow chart of a method of supplying power in accordance with the present invention;
FIG. 5 is a schematic diagram of a power supply system according to an embodiment of the present invention;
FIG. 6 is a flowchart of a power supply method according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Referring to fig. 1, fig. 1 is a block diagram of a power supply apparatus according to the present invention, including a power input terminal, a controllable DC-DC transforming circuit, and a USB interface having an OTG function, the USB interface including a control terminal for receiving a control signal of the controllable DC-DC transforming circuit and a voltage output terminal for outputting a charging voltage, the power input terminal being connected to an input terminal of the controllable DC-DC transforming circuit, the control terminal being connected to the controllable DC-DC transforming circuit, an output terminal of the controllable DC-DC transforming circuit being connected to the voltage output terminal.
According to the power supply equipment, the USB interface with the OTG function is used for realizing control data transmission, so that the controllable DC-DC transformation circuit is controlled to change the output charging voltage, the charging voltage is controllable, the compatibility of the power supply equipment to electric equipment is enhanced, the practicability of the power supply equipment is provided, the power supply equipment can be used repeatedly and reasonably, and the environmental pollution is reduced.
As a further improvement of the technical solution, referring to fig. 2, fig. 2 is a circuit diagram of a specific embodiment of a power supply device in the present invention, where the controllable DC-DC transforming circuit includes an MCU, a first inductor L1, a first capacitor C1, a first diode D and a first switching tube; in this embodiment, the MCU is implemented by using a single chip microcomputer of STMF103FSSOP20 type as the IC1 in fig. 2, the first capacitor C1 is implemented by using an electrolytic capacitor, the first switching tube is a PMOS tube, the first switching tube is as the Q1 in fig. 2, the gate of the PMOS tube is the control end of the switching tube, the source of the PMOS tube is the negative output end of the switching tube, and the drain of the PMOS tube is the positive output end of the switching tube. The POWER input end POWER is connected with the positive output end of the first switching tube Q1, and the control end of the first switching tube Q1 is connected with the output end of the MCU; the negative output end of the first switch tube Q1 is respectively connected with one end of the first inductor L1 and the negative electrode of the first diode D1, the positive electrode of the first diode D1 is grounded, the other end of the first inductor is connected with one end of the first capacitor, and the other end of the first capacitor is grounded; the other end of the first inductor L1 is connected with the voltage output end of the USB interface through the negative output end and the positive output end of the second switching tube, the control end of the second switching tube is connected with the output end of the MCU, the control end of the USB interface is connected with the MCU, the second switching tube is a PMOS tube as Q2 in figure 2, the grid electrode of the PMOS tube is the control end of the switching tube, the source electrode of the PMOS tube is the negative output end of the switching tube, the drain electrode of the PMOS tube is the positive output end of the switching tube, the voltage output end of the USB interface is a VDD end and a GND end, the positive output end of the second switching tube Q2 is connected with the VDD end of the USB interface, and the GND end of the USB interface is grounded; the control end of the USB interface comprises a D-end, a D+ end and an ID end, which are respectively connected with the MCU. The MCU is responsible for the system operation of the whole power supply equipment, and the voltage adjustment is realized by controlling the PMOS tube Q1, the inductor L1, the capacitor C1 and the diode D1 to form a simple Bulk circuit (of course, a BOOST circuit, a buck-BOOST circuit, a Cuk circuit and the like can also be used), so that the purpose of voltage and current adjustment is achieved. Therefore, the power supply equipment receives the control signal through the control end of the USB interface and sends the control signal to the MCU, and the MCU controls the on time of the first switching tube according to the control signal to control the magnitude of the charging voltage, so that compatibility with different electric equipment is realized.
As a further improvement of the technical scheme, referring to fig. 2, fig. 2 is a circuit diagram of a specific embodiment of a power supply device in the present invention, where the controllable DC-DC voltage transformation circuit further includes a third switching tube, a first zener diode ZD1, and a first resistor R1, in this embodiment, the third switching tube is an NMOS tube, such as Q3 in fig. 2, a gate of the NMOS tube is a control end of the switching tube, a source of the NMOS tube is a negative output end of the switching tube, and a drain of the NMOS tube is a positive output end of the switching tube; the negative output end of the second switching tube Q2 is connected with the input end of the MCU, the control end of the third switching tube Q3 is connected with the output end of the MCU, the negative output end of the third switching tube Q3 is grounded, the positive output end of the third switching tube Q3 is connected with the negative electrode of the first zener diode ZD1, the positive electrode of the first zener diode ZD1 is connected with the negative output end of the second switching tube Q2, one end of the first resistor R1 is respectively connected with the input end of the MCU and the USB interface, in the embodiment, one end of the first resistor R1 is connected with the GND end of the USB interface, the other end of the first resistor R1 is grounded, and one end of the first capacitor C1 is connected with the input end of the MCU. Therefore, as shown in the figure, the USB interface and the first zener diode ZD1 are connected with C5 and C6 pins of the MCU to realize current measurement feedback; and secondly, one end of the first capacitor C1 is connected with a D6 pin of the MCU to realize voltage measurement feedback, so that the power supply equipment can measure charging voltage and charging current in real time to realize feedback control, and the NMOS tube Q3 mainly protects the output of the power supply equipment and protects electric equipment.
As a further improvement of the technical scheme, referring to fig. 2, fig. 2 is a circuit diagram of a specific embodiment of a power supply device in the present invention, and the controllable DC-DC voltage transformation circuit further includes a temperature-sensitive resistor R2, wherein one end of the temperature-sensitive resistor R2 is connected to the input end of the MCU, and the other end of the temperature-sensitive resistor R2 is grounded. The temperature of the power supply equipment can be measured through the temperature sensitive resistor R2, and the MCU can conveniently carry out charging control according to the measured temperature.
As a further improvement of the technical scheme, the power supply equipment is a mobile terminal direct charging charger, a power adapter or a mobile power supply.
Referring to fig. 3, fig. 3 is a block diagram of a power supply system in the present invention, which includes an intelligent communication terminal, electric equipment, and the power supply equipment, wherein a power input end of the power supply equipment is connected with a power supply, and the intelligent communication terminal and the electric equipment are respectively connected with a USB interface of the power supply equipment.
According to the power supply system, the intelligent communication terminal is used for sending the control data of the controllable DC-DC transformation circuit, so that the power supply equipment is compatible to supply power to various electric equipment. Wherein the control data comprises upgrade data of the power supply device. The USB interface of the power supply equipment is also an interface of the intelligent communication terminal supporting data bidirectional transmission besides the USB interface with the OTG function.
As a further improvement of the technical scheme, the intelligent communication terminal comprises intelligent products capable of carrying out networking communication, such as mobile phones, notebook computers, iPADs or PDAs.
As a further improvement of the technical scheme, the electric equipment comprises an intelligent communication terminal. When the electric equipment is the intelligent communication terminal, the intelligent communication terminal sends control data such as upgrade data to help the power supply equipment to realize upgrade compatibility, and the power supply equipment can supply power to the intelligent communication terminal. When the electric equipment is other non-intelligent communication terminals, the intelligent communication terminals help the power supply equipment to realize upgrade compatibility, and then the power supply equipment supplies power to the non-intelligent communication terminals.
As a further improvement of the technical scheme, the power supply system further comprises a cloud server, wherein the cloud server is used for storing upgrade data of power supply equipment corresponding to different electric equipment, and the intelligent communication terminal is connected with the cloud server through a network.
Generally, upgrade data of the power supply equipment can be obtained through networking of the intelligent communication terminal, can be obtained through manual searching, can also be obtained through connection of the intelligent communication terminal and a cloud server of a background, and when the cloud server stores upgrade data of the power supply equipment corresponding to different electric equipment, normal upgrade of the power supply equipment is guaranteed.
Referring to fig. 4, fig. 4 is a flowchart of a power supply method in the present invention, which includes the following steps:
s1, an intelligent communication terminal acquires equipment information of electric equipment and version information of power supply equipment;
s2, the intelligent communication terminal compares the equipment information of the electric equipment with version information of the power supply equipment to judge whether the power supply equipment supports the quick charge of the electric equipment, if so, the power supply equipment carries out the quick charge of the electric equipment, otherwise, the step S3 is carried out;
and S3, the intelligent communication terminal is connected with the network to acquire upgrade data of the power supply equipment and send the upgrade data to the power supply equipment so as to upgrade the power supply equipment, and then the power supply equipment charges electric equipment rapidly.
In the power supply method, when the power supply equipment is not matched with the electric equipment, namely the power supply equipment cannot charge the electric equipment quickly, generally, the power supply equipment stores information of the supportable electric equipment, wherein the information comprises the model number, the corresponding charging parameters, the protection parameters and the like of the electric equipment, when the electric equipment is not in the supportable electric equipment, the power supply equipment is required to be upgraded, otherwise, the power supply equipment can upgrade the electric equipment. According to the invention, the intelligent communication terminal is used for acquiring the upgrade data of the power supply equipment to realize upgrade so as to match the electric equipment to supply power to the power supply equipment, and the compatibility of the power supply equipment is provided, so that the realization method is simple and effective.
As a further improvement of the technical scheme, the upgrade data comprise a quick charging protocol, a charging parameter and a protection parameter of the corresponding electric equipment. After the power supply equipment finishes upgrading according to the upgrading data, the electric equipment is charged rapidly according to the data such as the rapid charging protocol, the charging parameters, the protection parameters and the like. Taking a mobile phone as an example, the fast charging protocol includes QC protocol, PE protocol and OPPO protocol.
As a further improvement of the technical solution, the fast charging of the powered device by the power supply device includes:
the power supply equipment judges whether the electric equipment supports quick charging, and if so, the power supply equipment carries out quick charging on the electric equipment according to a quick charging protocol; otherwise, the power supply equipment carries out common charging on the electric equipment according to the charging parameters, and the MCU of the power supply equipment acquires charging current and charging voltage in real time so as to carry out charging current and charging voltage adjustment, thereby realizing charging acceleration. During ordinary charging, the power supply equipment increases power output and increases charging speed by properly increasing charging voltage.
For electric equipment which does not support quick charging, for example, a mobile phone which does not support a quick charging protocol, a power supply device, namely an MCU of a charger, acquires charging current and charging voltage in real time, calculates charging power, gradually increases the charging voltage, increases power output, increases the charging speed, compensates for the loss caused by line and interface contact resistance, and maintains the optimal state of the PMU of the mobile phone for charging a battery, so that the charging speed can be increased by more than 5%.
Since we generally use a power charger, the output power thereof is constant, and charging is basically only considered in the off state for saving cost. In order to ensure the operation of the mobile phone, the charging time is inevitably increased by only reducing the current for charging the battery because the output power is insufficient when the mobile phone is charged in the starting state. Therefore, in the invention, in the long-term use process, the output charging voltage is dynamically adjusted, so that the mobile phone can be provided with enough electricity in the charging process, whether making a call or watching a movie, and the current output to a battery is ensured to be constant and maximum, thus the speed of 20-50% can be improved. By means of real-time tracking and adjusting of output power, the mobile phone is guaranteed to have enough electric energy supply no matter what state the mobile phone is in, and constant charging current of a battery is guaranteed; the charging time is reduced, and the service life of the battery is prolonged.
In practice, the intelligent communication terminal needs to install a corresponding control APP to realize data interaction with the electric equipment and the power supply equipment, and the power supply equipment also needs to write corresponding software to perform work control, and software modules of the power supply equipment mainly comprise: the system comprises a USB interface module, a charging management module, charging parameters, an upgrading management module and an output protection management module, wherein the USB interface module is responsible for switching a master mode and a slave mode, and is used for processing communication with an intelligent communication terminal in the slave mode, and the master mode is responsible for matching the charging mode of electric equipment, such as communication of a quick flushing protocol, matching of a QCR protocol and the like; the charging management module is mainly responsible for outputting specified voltage and current according to command requirements according to communication signals sent by the intelligent communication terminal during quick flushing; for example, when QC protocol is charged, 5V voltage is output when no communication is established; when the QC protocol communication is successful, the output voltage rises to 9V or 12V; in the normal charging mode, the designated voltage is output, the output voltage is increased, and the maximum power is output to the electric equipment in the range lower than the safety voltage, so that the charging speed is increased, and the charging time is reduced; the charging parameter and upgrading management module is responsible for managing the protection parameter, the charging parameter and the software version information of the electric equipment and upgrading management; and finally, the output protection management module is responsible for managing the charging protection of the electric equipment during charging.
Taking a mobile phone as electric equipment and an intelligent communication terminal as an example, a charging protection mechanism of power supply equipment, namely a charger is described: the communication interaction confirms the working ranges and parameters of the respective voltages, working currents, protection currents and abnormal currents of the mobile phone and the charger, ensures the working safety range of each device, and avoids the damage of the devices caused by the fact that the voltages and the currents exceed the safety range. For example, when a mobile phone is charged by 5v, the maximum charging current of the mobile phone of the model tested by us is 1.5A, and when the charging current rises to 2A due to a problem of an internal circuit of the mobile phone, the common charger can continue to supply power due to short-circuit protection without detecting the subtle changes, so that the mobile phone is damaged. The charger in the invention can protect the mobile phone intelligently according to the protection parameters. When the current is monitored to exceed the specified value, a request for communication with the mobile phone is initiated. Through communicating with the control APP of the mobile phone, parameters such as the use electric quantity, the charging electric quantity, the output electric quantity and the temperature of the charger of the mobile phone are confirmed to judge whether the mobile phone has an internal short circuit or not, whether the possibility of explosion and fire is deduced or not is judged, and then the output is closed, the alarm of the mobile phone is opened, and the alarm prompts the user.
Specifically, the power supply device has the following eight-level protection (the electric equipment is exemplified by a mobile phone, and the power supply device is exemplified by a charger):
protection level 1: the mobile phone and the charger protocol parameters are fully interacted and communicated, so that the current output by the charger is ensured, and the voltage meets the requirements.
Protection level 2: and (5) short circuit protection. When the external abnormality occurs a short circuit, the charger can detect the problem in extremely short time (3 times faster than the common charger), and the output is quickly closed, so that the mobile phone is protected.
Protection level 3: the mobile phone internal charging circuit is protected abnormally, when the mobile phone internal charging circuit is abnormal, the change of current can occur, and the mobile phone is protected by monitoring the change of the current, so that the mobile phone is prevented from being further damaged.
Protection of level 4: and the problem of the battery inside the mobile phone is abnormally protected. When the battery is slightly damaged or abnormal, a current curve different from that of a normal battery can be generated in the charging process, and whether the mobile phone has the possibility of explosion and fire or not is confirmed through further parameter comparison (using electric quantity, charging electric quantity, output electric quantity of the charger, temperature and the like) of the charger and the mobile phone, so that a user is timely reminded, and personal safety accidents are avoided.
Protection of 5 th level: and protecting the circuit and the contact port. In the use process of the mobile phone, the charging wire is broken, the connector is loosened to cause poor contact, the frequent charging is actually a mobile phone, the mobile phone is damaged, the problem can be detected through the change of current and voltage, and when the current and the voltage fluctuate and suddenly change, a user is timely reminded of replacing the charging wire or maintaining the mobile phone, so that the problem is avoided.
Protection of level 6: and (5) temperature protection. When the temperature of the mobile phone is too high, the charger does not close the output and still supplies power to the mobile phone, so that potential safety hazards exist, and the mobile phone is likely to generate heat and fire when the power is continuously supplied. The temperature of the mobile phone end is monitored through the temperature sensitive resistor, and when the temperature is larger than a preset value, voltage output is cut off so as to protect the mobile phone.
Protection of 7 th level: and (5) fully charging protection. After the mobile phone is full, the charger can close the output, so that hidden danger caused by charging the mobile phone for a long time is avoided.
And 8, performing level 8 protection, namely performing current limiting and short circuit charging protection on non-mobile phone equipment. The device can be charged through USB, but the common mobile phone charging short circuit current point is set higher, so that the protection function cannot be really started. When the charger identifies that the equipment is non-mobile phone equipment, the short-circuit current parameter is automatically adjusted, and the charging safety of the equipment is protected.
The power supply method of the invention is described below by taking an example that an intelligent communication terminal is a mobile phone, a power supply device is a charger, and electric equipment is the intelligent communication terminal, namely the mobile phone:
referring to fig. 5, fig. 5 is a schematic diagram of a power supply system according to an embodiment of the present invention, where a mobile phone charger is connected to a mobile phone through a charging line with an OTG interface, and performs communication interaction and charging with the mobile phone. The mobile phone is charged through USB and charger connection, no matter USB 2.0micro standard or USB 3.1Type c interface has OTG function.
Referring to fig. 6, fig. 6 is a flowchart of a specific embodiment of a power supply method in the present invention, after a mobile phone is connected to a charger, the charger judges whether the mobile phone is inserted, if so, the d+ end and the io port of the D-end of a USB interface of the charger are opened, the ID pin of the OTG line is set low, the OTG is started, the mobile phone is in host state, at this time, the mobile phone starts to read the equipment information of the charger, including the version information of the charger, and the information of the mobile phone supported by the charger, including the model number of the mobile phone, the corresponding fast charging protocol, the charging parameters and the protection parameters. After receiving the equipment ID and version information of the charger, the pre-installed APP on the mobile phone exchanges handshake version information of the charger and compares the information with the version of the APP of the mobile phone, if the current software version of the charger needs to be updated to support a quick charging mode, namely, the type of the mobile phone read by the APP in the mobile phone is not matched with a list of electric equipment in the charger, an upgrading request is written into the charger, meanwhile, the mobile phone terminal prompts upgrading after confirming the electric quantity of the mobile phone, the APP of the mobile phone is connected with a network to download whether feasible adaptation parameters exist, if so, a corresponding program, namely, a script, is downloaded through the network, and if the corresponding program cannot be downloaded on the network, the APP of the mobile phone can be connected with a server of a background to find whether the corresponding program exists. The charger receives the script downloaded by the mobile phone through the USB interface, checks whether the data is correct or not with the mobile phone, updates the code on the charger if the data is perfect, completes the adaptation, restarts the charger, and then starts to charge the mobile phone in an optimized charging mode. It should be noted that, in addition to downloading the program script, the corresponding charging parameters and protection parameters are also obtained together.
If the charging is not needed to be updated, the charger releases the ID pin, the mobile phone is led to exit from a charging mode, the OTG is closed, the mobile phone is switched to an optimal charging mode, a fast charging protocol is supported, the fast charging protocol stored in the charger is used for carrying out fast charging, otherwise, the mobile phone is charged according to stored charging parameters, charging voltage is obtained in real time, and charging acceleration is realized by properly improving the charging voltage. And if the charging is completed, ending the communication between the charger and the mobile phone.
The fast fill protocols are very diverse and updated very fast and are not compatible with each other. That is, it is common that the charger of the a-family cannot charge the B-family mobile phone. However, the hardware interfaces are basically those 4 wires (V+V-D+D-), and according to the model of the mobile phone, the corresponding communication script is downloaded, and the existing and new various quick-charging protocols are correspondingly used in the mode, so that the resources can be reused and reasonably, and the environmental pollution is reduced. The charger controls the charger to output appointed voltage and current to charge the mobile phone according to communication interaction between the communication script and the mobile phone, and the mobile phone is charged quickly. For example, when a request with 9V output exists, the QC fast-flushing protocol changes the 5V output of the charger to 9V, so that fast charging is realized.
The charger and the mobile phone communicate through a USB interface, the mobile phone communicates with a network, and after the correct configuration parameters are obtained through the network, the adaptive charging parameters are sent to the charger through a USB charging port of the mobile phone. The most appropriate charging scheme is given to the charger, which then charges the cell phone or tablet in an optimized manner. Such as QC3.0, PE, PD charging, etc., and further such as future qcx.0, etc. And the characteristics of the charger optimize the optimal charging effect and protection according to the characteristics of the battery of the mobile phone. The mobile phone charger can realize multiple mobile phones, and one charger can determine charging, can be put into operation for many years, and is energy-saving and emission-reducing. The mobile phones with different brands and different models are various in charging modes, and the charger and the mobile phone are updated in an interactive mode, so that any mobile phone can be charged by one charger. The possibility of purchasing a plurality of chargers is avoided, and the consumption of resources is saved. The energy and the emission are saved. And the battery power of the mobile phone APP is monitored, the power output by the charger is controlled by the PMU of the mobile phone, so that the output voltage optimized for the mobile phone can be analyzed, and the mobile phone is charged by the voltage, so that the one-to-one optimized charging effect is achieved, the charging time is shortened, and the service life of the battery is prolonged.
Similarly, the power supply process of intelligent communication terminals such as notebook computers, IPAD and the like is the same as that of the mobile phone, and the description is omitted; for other electric equipment without communication capability, the power supply equipment can supply power to the electric equipment after acquiring corresponding upgrade data by taking the intelligent communication terminal as an intermediary.
According to the power supply method, when the power supply equipment is not matched with the electric equipment, the intelligent communication terminal is used for obtaining the upgrade data of the power supply equipment to realize upgrade so as to match the electric equipment to supply power to the electric equipment, so that the compatibility of the power supply equipment is improved, and the method is simple and effective.
While the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are included in the scope of the present invention as defined in the appended claims.
Claims (10)
1. The power supply equipment is characterized by comprising a power input end, a controllable DC-DC transformation circuit and a USB interface with an OTG function, wherein the USB interface comprises a control end for receiving a control signal of the controllable DC-DC transformation circuit and a voltage output end for outputting a charging voltage, the power input end is connected with the input end of the controllable DC-DC transformation circuit, the control end is connected with the controllable DC-DC transformation circuit, and the output end of the controllable DC-DC transformation circuit is connected to the voltage output end;
the controllable DC-DC transformation circuit comprises an MCU, a first inductor, a first capacitor, a first diode and a first switching tube; the power input end is connected with the positive output end of the first switching tube, and the control end of the first switching tube is connected with the output end of the MCU; the negative output end of the first switch tube is respectively connected with one end of the first inductor and the negative electrode of the first diode, the positive electrode of the first diode is grounded, the other end of the first inductor is connected with one end of the first capacitor, and the other end of the first capacitor is grounded; the other end of the first inductor is connected with the voltage output end of the USB interface through the negative output end and the positive output end of the second switching tube, the control end of the second switching tube is connected with the output end of the MCU, and the control end of the USB interface is connected with the MCU;
the controllable DC-DC transformation circuit further comprises a temperature-sensitive resistor, one end of the temperature-sensitive resistor is connected with the input end of the MCU, and the other end of the temperature-sensitive resistor is grounded;
the controllable DC-DC transformation circuit further comprises a third switching tube, a first voltage stabilizing diode and a first resistor, wherein the negative output end of the second switching tube is connected with the input end of the MCU, the control end of the third switching tube is connected with the output end of the MCU, the negative output end of the third switching tube is grounded, the positive output end of the third switching tube is connected with the negative electrode of the first voltage stabilizing diode, the positive electrode of the first voltage stabilizing diode is connected with the negative output end of the second switching tube, one end of the first resistor is connected with the input end of the MCU and the USB interface respectively, the other end of the first resistor is grounded, and one end of the first capacitor is connected with the input end of the MCU.
2. The power supply device according to claim 1, wherein the first switching tube and the second switching tube are PMOS tubes, the third switching tube is an NMOS tube, gates of the PMOS tube and the NMOS tube are control ends of the switching tubes, sources of the PMOS tube and the NMOS tube are negative output ends of the switching tubes, and drains of the PMOS tube and the NMOS tube are positive output ends of the switching tubes.
3. The power supply apparatus according to any one of claims 1 to 2, characterized in that the power supply apparatus is a mobile terminal direct charger, a power adapter or a mobile power supply.
4. The power supply system is characterized by comprising an intelligent communication terminal, electric equipment and the power supply equipment according to any one of claims 1 to 3, wherein a power input end of the power supply equipment is connected with a power supply, and the intelligent communication terminal and the electric equipment are respectively connected with a USB interface of the power supply equipment.
5. The power supply system of claim 4, wherein the intelligent communication terminal comprises a cell phone, a notebook computer, an iPAD, or a PDA.
6. The power supply system of claim 4 or 5, wherein the powered device comprises an intelligent communication terminal.
7. The power supply system according to claim 6, further comprising a cloud server for storing upgrade data of the power supply device corresponding to different electric devices, wherein the intelligent communication terminal is connected to the cloud server through a network.
8. A power supply method applied to the power supply system according to any one of claims 4 to 7, characterized by comprising the steps of:
s1, an intelligent communication terminal acquires equipment information of electric equipment and version information of power supply equipment;
s2, the intelligent communication terminal compares the equipment information of the electric equipment with version information of the power supply equipment to judge whether the power supply equipment supports the quick charge of the electric equipment, if so, the power supply equipment carries out the quick charge of the electric equipment, otherwise, the step S3 is carried out;
and S3, the intelligent communication terminal is connected with the network to acquire upgrade data of the power supply equipment and send the upgrade data to the power supply equipment so as to upgrade the power supply equipment, and then the power supply equipment charges electric equipment rapidly.
9. The power supply method of claim 8, wherein the upgrade data includes a fast charge protocol, a charging parameter, and a protection parameter of the corresponding powered device.
10. The power supply method of claim 9, wherein the power supply device rapidly charging the powered device comprises:
the power supply equipment judges whether the electric equipment supports quick charging, and if so, the power supply equipment carries out quick charging on the electric equipment according to a quick charging protocol; otherwise, the power supply equipment carries out common charging on the electric equipment according to the charging parameters, and the MCU of the power supply equipment acquires charging current and charging voltage in real time so as to carry out charging current and charging voltage adjustment, thereby realizing charging acceleration.
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| CN110177454A (en) * | 2017-11-30 | 2019-08-27 | 南京德朔实业有限公司 | Electric tool system and upgrade method for the system |
| EP3719952A4 (en) | 2018-10-12 | 2021-01-27 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging method, terminal and computer storage medium |
| CN112448435A (en) * | 2019-09-03 | 2021-03-05 | 中兴通讯股份有限公司 | Terminal equipment charging method and device and storage medium |
| CN110994728A (en) * | 2019-12-18 | 2020-04-10 | 深圳市雄成祥科技有限公司 | Intelligent quick-charging equipment |
| CN111211603B (en) * | 2020-03-06 | 2024-06-28 | 深圳市同为数码科技股份有限公司 | QC2.0 protocol circuit applied to terminal equipment |
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