Multi-port blind plug-in fast charging power supply and charging method

Abstract

The application discloses a multi-port blind-plugging fast-charging power supply and a charging method. The multi-port blind-plugging fast-charging power supply synchronizes the states of respective charging interfaces through a plurality of charging control modules, then switches the output flow direction of a voltage control module by using a logic switching module, when the charging interface corresponding to one of the charging control modules first receives the fast-charging voltage output by the AC-DC conversion module, the charging interfaces corresponding to the remaining charging control modules receive the non-fast-charging voltage output by the voltage control module through the logic switching module, so that the fast-charging charging interface does not need to be distinguished, and any charging interface can be fast-charged as long as it accesses the charging equipment earlier than other charging interfaces, that is, the multi-port blind-plugging fast-charging effect of first-plugging first-fast-charging is realized, and the use of the multi-port fast-charging power supply is more reasonable and humanized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a multi-port blind plug fast charging power supply and a charging method. BACKGROUND

[0002] With the development of technology, many charging products support fast charging, which can greatly reduce the charging time and improve user experience. The general process is to first perform protocol docking before charging, and after confirming the support of voltage and current, charging is started. For single-port protocol, only one-to-one is needed, which is relatively simple, while many charging products now support two or more ports for simultaneous charging. In the existing multi-port fast charging application scheme, some multi-port schemes need to distinguish the charging port, and only a certain port can be fast charged, which causes the user to need to identify the fast charging port before connecting the charging device. The existing multi-port fast charging scheme is inconvenient to use and cannot achieve blind plugging. SUMMARY

[0003] To solve the above problems, the present application provides a multi-port blind plug fast charging power supply and a charging method, which does not need to distinguish the fast charging interface, and any charging interface can be fast charged as long as it is the first to access the charging device, realizing multi-port blind plug fast charging. The specific technical scheme of the present application is as follows:

[0004] A multi-port blind plug fast charging power supply, comprising an AC-DC conversion module, a voltage control module and a charging control module, a plurality of charging control modules are connected to each other to synchronize the states of their respective charging interfaces; one end of the voltage control module is connected to the AC-DC conversion module, and the other end is connected to a logic switching module; when one of the charging control modules receives the fast charging voltage output by the AC-DC conversion module first, the charging interfaces corresponding to the remaining charging control modules receive the non-fast charging voltage output by the voltage control module through the logic switching module; wherein the logic switching module is used to switch the flow direction of the output voltage of the voltage control module.

[0005] Further, the multi-port blind plug fast charging power supply further comprises an optoelectronic coupler, a plurality of charging control modules are connected to one end of the optoelectronic coupler, and the optoelectronic coupler is controlled to change the light coupling signal based on the state of the charging interface; the other end of the optoelectronic coupler is connected to the AC-DC conversion module, and the AC-DC conversion module changes the output voltage according to the change of the light coupling signal of the optoelectronic coupler, so that the charging interface outputs the fast charging voltage.

[0006] Further, the charging control module comprises a master charging control module and a slave charging control module; wherein the master charging control module is connected with the voltage control module, when the charging interface corresponding to the master charging control module receives the fast charging voltage output by the AC-DC conversion module, the master charging control module outputs a control signal to enable the voltage control module to provide a non-fast charging voltage to the charging interface corresponding to the slave charging control module; when the charging interface corresponding to the slave charging control module receives the fast charging voltage output by the AC-DC conversion module, the master charging control module outputs a control signal to enable the voltage control module to provide a non-fast charging voltage to the charging interface corresponding to the master charging control module.

[0007] Further, the slave charging control module comprises a pin for distinguishing master and slave, and the master charging control module and the slave charging control module are distinguished according to whether the pin for distinguishing master and slave is in a pull-up state.

[0008] Further, the charging interface comprises a first charging interface and a second charging interface; wherein the first charging interface is connected with the slave charging control module, and the second charging interface is connected with the master charging control module.

[0009] Further, the first charging interface is a USB-C1 interface, comprising a power pin, a ground pin, a first fast charging configuration channel, a second fast charging configuration channel, a positive data pin and a negative data pin; wherein the power pin is connected with the second voltage pin of the slave charging control module, the power pin is connected with the output pin of the AC-DC conversion module through a first MOS tube, the power pin is connected with the output pin of the voltage control module through a logic switching module, the first MOS tube is controlled by a control signal sent by the first drive pin of the slave charging control module, the ground pin is connected with the first current detection pin of the slave charging control module through a resistor, the ground pin is also connected with the second current detection pin of the slave charging control module, the first fast charging configuration channel and the second fast charging configuration channel are respectively connected with the corresponding fast charging configuration channels of the slave charging control module, and the positive data pin and the negative data pin are respectively connected with the corresponding data pins of the slave charging control module.

[0010] Further, the second charging interface is a USB-C2 interface, including a power pin, a ground pin, a first fast charging configuration channel, a second fast charging configuration channel, a positive data pin and a negative data pin; wherein the power pin is connected with the second voltage pin of the main charging control module, the power pin is connected with the output pin of the AC-DC conversion module through a second MOS tube, the second MOS tube is controlled by a control signal sent by the first drive pin of the main charging control module, the ground pin is connected with the first current detection pin of the main charging control module through a resistor, the ground pin is also connected with the second current detection pin of the main charging control module, the first fast charging configuration channel and the second fast charging configuration channel are connected with the corresponding fast charging configuration channels of the main charging control module respectively, and the positive data pin and the negative data pin are connected with the corresponding data pins of the main charging control module respectively.

[0011] Further, the logic switching module includes a first logic switch and a second logic switch, the first logic switch is connected with the first charging interface, and the second logic switch is connected with the second charging interface.

[0012] Further, the first logic switch includes a first PMOS tube, a first NPN tube and a first resistor; wherein one end of the first PMOS tube is connected to the output pin of the voltage control module, one end is connected to the first charging interface, and the other end is connected between the first resistor and the first NPN tube, the first resistor is also connected to the output pin of the AC-DC conversion module, and the first NPN tube is also connected to the first IO port of the main charging control module; when the corresponding charging interface of the main charging control module receives the fast charging voltage output by the AC-DC conversion module, the main charging control module outputs a control signal through the first IO port to open the first PMOS tube, so that the voltage control module provides a non-fast charging voltage to the corresponding charging interface of the slave charging control module.

[0013] Further, the second logic switch includes a second PMOS tube, a second NPN tube and a second resistor; wherein one end of the second PMOS tube is connected to the output pin of the voltage control module, one end is connected with the second charging interface, and the other end is connected between the second resistor and the second NPN tube, the second resistor is also connected to the output pin of the AC-DC conversion module, and the second NPN tube is also connected to the second IO port of the main charging control module; when the corresponding charging interface of the slave charging control module receives the fast charging voltage output by the AC-DC conversion module, the main charging control module outputs a control signal through the second IO port to open the second PMOS tube, so that the voltage control module provides a non-fast charging voltage to the corresponding charging interface of the slave charging control module.

[0014] Further, the number of the voltage control modules is 1; the voltage control module includes an input pin, an enable pin, a ground pin and an output pin, wherein the input pin is connected with the output pin of the AC-DC conversion module, the enable pin is connected with the third IO port of the main charging control module, and the output pin is connected with the first PMOS tube and the second PMOS tube respectively, so that the voltage control module provides the non-fast charging voltage to the corresponding charging interface of the slave charging control module or the main charging control module when the first PMOS tube or the second PMOS tube is opened.

[0015] Further, the number of the optoelectronic coupler is 1, the input end of which is connected with the output pin of the AC-DC conversion module, and the output end is connected with the optocoupler signal pin of the charging control module.

[0016] A multi-port blind plug fast charging method is realized based on the multi-port fast charging power supply, and the method specifically includes: synchronizing the charging interface states of the charging control modules, when the charging interface of one of the charging control modules first receives the fast charging voltage output by the AC-DC conversion module, switching the output voltage direction of the voltage control module through the logic switching module, so that the voltage control module provides the non-fast charging voltage to the charging interface of the remaining charging control module.

[0017] Further, the charging control module includes the main charging control module and the slave charging control module, and the charging interface states of the charging control modules are synchronized through the communication interface, wherein the communication interface includes any one of the IO port or the I2C bus.

[0018] Further, after the charging interface states of the main charging control module and the slave charging control module are synchronized, the method includes: step S1, the main charging control module judges whether the first charging interface and the second charging interface are connected with the external equipment, if the second charging interface is connected with the charging equipment earlier than the first charging interface, step S2 is entered, if the first charging interface is connected with the charging equipment earlier than the second charging interface, step S3 is entered; step S2, the main charging control module controls the change of the optocoupler signal of the optoelectronic coupler, so that the AC-DC conversion module provides the fast charging voltage for the second charging interface, and at the same time, the main charging control module switches the output voltage direction of the voltage control module through the logic switching module, so that the voltage control module provides the non-fast charging voltage to the first charging interface; step S3, the main charging control module closes the enable of the optocoupler signal pin, and at the same time, the main charging control module opens the enable of the optocoupler signal pin of the slave charging control module to control the change of the optocoupler signal of the optoelectronic coupler, so that the AC-DC conversion module provides the fast charging voltage for the first charging interface, and at the same time, the main charging control module switches the output voltage direction of the voltage control module through the logic switching module, so that the voltage control module provides the non-fast charging voltage to the second charging interface.

[0019] Further, in the step S2 or the step S3, the method that the master charging control module or the slave charging control module controls the photocoupler to change the photocoupling signal, so that the AC / DC conversion module provides the fast charging voltage for the second charging interface or the first charging interface specifically includes: the master charging control module compares the current output voltage of the AC / DC conversion module with the application voltage of the charging device obtained by the second charging interface, when the current output voltage of the AC / DC conversion module is less than the application voltage of the charging device obtained by the second charging interface, the master charging control module controls the photocoupler to become smaller, so that the AC / DC conversion module increases the output voltage until the current output voltage of the AC / DC conversion module is equal to the application voltage of the charging device obtained by the second charging interface, thereby realizing providing the fast charging voltage for the second charging interface; or the slave charging control module compares the current output voltage of the AC / DC conversion module with the application voltage of the charging device obtained by the first charging interface, when the current output voltage of the AC / DC conversion module is less than the application voltage of the charging device obtained by the first charging interface, the slave charging control module controls the photocoupler to become smaller, so that the AC / DC conversion module increases the output voltage until the current output voltage of the AC / DC conversion module is equal to the application voltage of the charging device obtained by the first charging interface, thereby realizing providing the fast charging voltage for the first charging interface; wherein the application voltage of the charging device meets the requirement of the fast charging voltage.

[0020] Further, in the step S2, the method that the master charging control module switches the output voltage flow direction of the voltage control module through the logic switching module to make the voltage control module provide the non-fast charging voltage for the first charging interface specifically includes: step S21, the master charging control module sends a control signal through the third IO port to open the enable of the voltage control module; step S22, the master charging control module sends a control signal through the first IO port to control the first NPN tube to turn on, so as to open the first PMOS tube, and at the same time sends a control signal through the second IO port to close the second NPN tube, so that the voltage control module provides the non-fast charging voltage for the first charging interface.

[0021] Further, in the step S3, the method that the master charging control module switches the output voltage flow direction of the voltage control module through the logic switching module to make the voltage control module provide the non-fast charging voltage for the second charging interface specifically includes: step S31, the master charging control module sends a control signal through the third IO port to open the enable of the voltage control module; step S32, the master charging control module sends a control signal through the first IO port to control the second NPN tube to turn on, so as to open the second PMOS tube, and at the same time sends a control signal through the second IO port to close the first NPN tube, so that the voltage control module provides the non-fast charging voltage for the second charging interface.

[0022] The beneficial effect of the present application is that: compared with the prior art, the multi-port blind plug fast charging power supply disclosed by the present application synchronizes the state of each charging interface through multiple charging control modules, and then switches the output flow direction of the voltage control module by using a logic switching module, when the charging interface corresponding to one of the charging control modules first receives the fast charging voltage output by the AC-DC conversion module, the charging interfaces corresponding to the remaining charging control modules receive the non-fast charging voltage output by the voltage control module through the logic switching module, thereby realizing the effect of multi-port blind plug fast charging without distinguishing the fast charging interface, and any charging interface can fast charge as long as it accesses the charging device first, that is, realizing the effect of first plug first fast charging, making the use of the multi-port fast charging power supply more reasonable and humanized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The circuit structure schematic diagram of the multi-port blind plug fast charging power supply according to an embodiment of the present application.

[0024] Figure 2 The flowchart schematic diagram of the multi-port blind plug fast charging method according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. It should be understood that the specific embodiments described below are only used to explain the present application, and are not used to limit the present application.

[0026] In the following description, specific details are given to provide a thorough understanding of the embodiments. However, one of ordinary skill in the art will understand that the embodiments can be practiced without these specific details. For example, circuits can be shown in block diagrams in order not to obscure the embodiments in unnecessary detail. In other instances, well-known circuits, structures and techniques have not been shown in detail in order not to obscure the embodiments.

[0027] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] As used in this application, the term “if’ can be construed to mean “when” or “once” or “in response to a determination” or “in response to a detection” that a described condition or event occurs. Similarly, the phrase “if it is determined” or “if [a described condition or event] is detected” can be construed to mean “once it is determined” or “in response to a determination” or “once [a described condition or event] is detected” or “in response to the detection” of [a described condition or event].

[0029] With the development of technology, many charging products support fast charging, which can greatly reduce the charging time and improve the user experience. The general process is to first perform protocol docking before charging, and after confirming the support of voltage and current, charging is started. For single-port protocol, only one-to-one is needed, which is relatively simple, while many charging products now support two or more ports for simultaneous charging. In the existing multi-port fast charging application scheme, some multi-port schemes need to distinguish the charging port, and only a certain port can be fast charged, which causes the user to need to identify the fast charging port before connecting the charging device when using the charger. The existing multi-port fast charging scheme is inconvenient to use and cannot realize blind plugging.

[0030] To solve the above technical problems, the embodiment of the present application provides a multi-port blind plugging fast charging power supply, which does not need to distinguish the fast charging interface, and any charging interface can be fast charged as long as it is the first to access the charging device, realizing multi-port blind plugging fast charging. As shown in the figure, Figure 1 The multi-port blind plugging fast charging power supply specifically includes an AC-DC conversion module, a voltage control module and a charging control module. Wherein, the charging control modules are connected with each other to synchronize the states of the charging interfaces; one end of the voltage control module is connected with the AC-DC conversion module, and the other end is connected with a logic switching module; when the charging interface corresponding to one of the charging control modules first receives the fast charging voltage output by the AC-DC conversion module, the charging interfaces corresponding to the remaining charging control modules receive the non-fast charging voltage output by the voltage control module through the logic switching module; wherein, the logic switching module is used to switch the flow direction of the output voltage of the voltage control module.

[0031] Referring to Figure 1 , the multi-port blind plugging fast charging power supply further includes an optoelectronic coupler, and the charging control modules are commonly connected to one end of the optoelectronic coupler and control the change of the optocoupler signal of the optoelectronic coupler based on the state of the charging interface. The other end of the optoelectronic coupler is connected to the AC-DC conversion module, and the AC-DC conversion module changes the output voltage according to the change of the optocoupler signal of the optoelectronic coupler, so that the charging interface outputs the fast charging voltage.

[0032] In a preferred embodiment, the number of optocouplers is one, with its input terminal connected to the output pin of the AC / DC conversion module and its output terminal connected to the optocoupler signal pins of several charging control modules. Specifically, the output terminal of the optocoupler is connected to the optocoupler signal pin (i.e., the OPTO pin) of the main charging control module and the optocoupler signal pin of the slave charging control module, respectively. The main charging control module and the slave charging control module control the output of the fast charging voltage of the AC / DC conversion module through the optocoupler. The optocoupler is a component that bridges the primary and secondary sides of the AC / DC conversion module. Figure 1 (The complete circuitry of the optocoupler is not shown). The signal it generates is a crucial feedback signal from the secondary to the primary side, controlling the AC / DC converter module to output the fast-charging voltage. Since the main charging control module and the slave charging control module share the same optocoupler signal, neither module can perform fast charging if used simultaneously. In other words, only one charging control module can use the optocoupler signal at a time. Therefore, the charging control module needs to decide on the control of the optocoupler signal based on the charging interface; only the module that gains control of the optocoupler signal has the right to perform fast charging.

[0033] like Figure 1 As shown, the optocoupler can be simplified to consist of a light-emitting LED and a phototransistor (not shown, connected between the primary and secondary sides of the AC / DC converter module). A resistor is connected in both series and parallel to the LED, both used to regulate the LED's current. When the current voltage is too high, the current flowing into the optocoupler is large, making the LED brighter. This results in a larger current being fed back to the phototransistor, causing the AC / DC converter module to control the duty cycle of the primary output voltage, thus reducing the voltage. Conversely, when the current voltage is too low, the current flowing into the optocoupler is small, making the LED dimmer. This results in a smaller current being fed back to the phototransistor, causing the AC / DC converter module to control the duty cycle of the primary output voltage, thus increasing the voltage. The basic idea of ​​voltage regulation using an optocoupler is as described above and will not be repeated. Additionally, the optocoupler can isolate high voltage, thereby protecting the charging equipment. Preferably, the optocoupler used is the EL1018 manufactured by Everlight Electronics. Preferably, the primary control chip of the AC / DC conversion module is the NCP4306 manufactured by ON Semiconductor. The AC / DC conversion module is used to convert AC power into DC power, wherein the AC power is AC mains power. This embodiment of the invention requires only one optocoupler to achieve multi-port fast charging, simplifying the circuit structure and reducing BOM (Bill of Materials) costs.

[0034] As one of the embodiments, the charging control module includes a master charging control module and a slave charging control module. The master charging control module is connected with the voltage control module. When the charging interface corresponding to the master charging control module receives the fast charging voltage output by the AC-DC conversion module, the master charging control module outputs a control signal to enable the voltage control module to provide a non-fast charging voltage to the charging interface corresponding to the slave charging control module. When the charging interface corresponding to the slave charging control module receives the fast charging voltage output by the AC-DC conversion module, the master charging control module outputs a control signal to enable the voltage control module to provide a non-fast charging voltage to the charging interface corresponding to the master charging control module.

[0035] It should be noted that the master charging control module and the slave charging control module can be integrated on one fast charging protocol chip, or the master charging control module can be integrated on one fast charging protocol chip and the slave charging control module can be integrated on another fast charging protocol chip. In other words, one fast charging protocol chip can be provided with one charging control module or multiple charging control modules. Regardless, the master charging control module and the slave charging control module synchronize the states of their respective charging interfaces through a communication interface. Preferably, the master charging control module and the slave charging control module use a CV656 produced by the Micro-Star International Corporation.

[0036] As one of the embodiments, the slave charging control module includes a pin for distinguishing the master and the slave. Whether the pin for distinguishing the master and the slave is in a pull-up state is used to distinguish the master charging control module and the slave charging control module. Specifically, the pin for distinguishing the master and the slave is pulled up during power initialization, indicating that the charging control module with the pin is identified as the slave charging control module, and the other charging control module is identified as the master charging control module. Alternatively, the FB pin (the driving output end of the feedback loop) on the slave charging control module is used as a GPIO port (general input / output port). When the FB pin is high, it indicates that it is pulled up, so as to distinguish the master and the slave. The master charging control module and the slave charging control module can communicate with each other, but are responsible for different contents. The slave charging control module mainly reports the state of its charging interface to the master charging control module in real time, and the master charging control module performs corresponding operations according to the state of the charging interface of the slave charging control module and the state of its charging interface. In addition, the master charging control module also has the functions of managing the enablement of the voltage control module and switching the flow direction of the output voltage of the voltage control module through a logic switching module. As one of the embodiments, the master charging control module and the slave charging control module perform serial communication through the multiplexed NTC / GPIO0 IO port, without the need for an additional MCU to monitor the plugging of the charging interface and to perform power distribution on different interface states, thereby simplifying the circuit structure and the power distribution process. As another embodiment, the master charging control module and the slave charging control module communicate through an I2C bus or communicate through the transmission of fixed pulses in a single-wire protocol.

[0037] As shown in Figure 1 The charging interface includes a first charging interface and a second charging interface; the first charging interface is connected with the slave charging control module, and the second charging interface is connected with the master charging control module.

[0038] As one of the embodiments, the first charging interface is a USB-C1 interface, which includes a power pin VBUS, a ground pin GND, a first fast charging configuration channel CC1, a second fast charging configuration channel CC2, a positive data pin D+ and a negative data pin D-.

[0039] Specifically, the power pin is connected with a second voltage pin VBUS of the slave charging control module, which is used to detect the size of the current voltage provided to the first charging interface, so as to determine whether it is overvoltage or undervoltage. The power pin is connected with an output pin VOUT of the AC / DC conversion module through a first MOS tube. When the first MOS tube is opened, the AC / DC conversion module can supply power to the first charging interface and realize fast charging. The first MOS tube is controlled by a control signal sent by a first drive pin DRV_C of the slave charging control module. It should be noted that the first voltage pin VIN of the slave charging control module is connected to the output pin VOUT of the AC / DC conversion module. When the first charging interface applies for fast charging, the slave charging control module will first detect whether the current voltage of the AC / DC conversion module meets the application voltage of the charging device obtained by the first charging interface through the first voltage pin. If it does not meet, a voltage regulation process will be performed, and after the voltage is stabilized, the first MOS tube will be opened through the first drive pin to ensure the normal charging of the first charging interface. In addition, the AC / DC conversion module also provides working voltage for the slave charging control module through the first voltage pin. The power pin is connected with an output pin of the voltage control module through a logic switching module. When the voltage control module is enabled, the voltage control module can supply power to the first charging interface. The ground pin is connected with a first current detection pin CSN of the slave charging control module through a resistor, and is also connected with a second current detection pin CSP of the slave charging control module to realize current detection and ensure charging safety. The first fast charging configuration channel and the second fast charging configuration channel are respectively connected with the corresponding fast charging configuration channels CC1 and CC2 of the slave charging control module, and the positive data pin and the negative data pin are respectively connected with the corresponding data pins DP and DM of the slave charging control module, which are all used for communication with the charging device, such as obtaining the fast charging voltage or fast charging power required by the charging device. Different fast charging protocols use different pins for communication, which will not be described here.

[0040] As one of the embodiments, the second charging interface is a USB-C2 interface, which includes a power pin VBUS, a ground pin GND, a first fast charging configuration channel CC1, a second fast charging configuration channel CC2, a positive data pin D+ and a negative data pin D-.

[0041] Specifically, the power pin is connected with the second voltage pin VBUS of the main charging control module, the second voltage pin is used to detect the size of the voltage currently provided to the first charging interface, so as to determine whether it is overvoltage or undervoltage. The power pin is connected with the output pin of the AC-DC conversion module through the second MOS tube, the second MOS tube is controlled by the control signal sent by the first drive pin DRV_C of the main charging control module, when the second MOS tube is opened, the AC-DC conversion module can supply power to the second charging interface and realize fast charging. The ground pin is connected with the first current detection pin CSN of the main charging control module through a resistor, the ground pin is also connected with the second current detection pin CSP of the main charging control module, the first fast charging configuration channel and the second fast charging configuration channel are connected with the corresponding fast charging configuration channels CC1 and CC2 of the main charging control module respectively, the positive data pin and the negative data pin are connected with the corresponding data pins DP and DM of the main charging control module respectively. The functions or use modes of the pins are consistent with the corresponding pins on the slave charging control module, and will not be described again.

[0042] It should be noted that in the embodiment, the 2C fast charging scheme is taken as an example, but the application is not limited to the 2C scheme, and can also be applied to the 2C1A scheme or the 2C2A scheme, the USB-C port can be replaced with the USB-A port, vice versa, and the number of charging interfaces can also be adaptively changed. For the convenience of description, the USB-C1 interface and the USB-C2 interface will be taken as examples for description in the text.

[0043] As shown in Figure 1 The logic switching module includes a first logic switch and a second logic switch, the first logic switch is connected with the first charging interface, and the second logic switch is connected with the second charging interface.

[0044] As one of the preferred embodiments, the first logic switch includes a first PMOS tube, a first NPN tube and a first resistor. One end of the first PMOS tube is connected to the output pin VOUT of the voltage control module, one end is connected to the first charging interface, and the other end is connected between the first resistor and the first NPN tube. The first resistor is also connected to the output pin of the AC-DC conversion module, and the first NPN tube is also connected to the first IO port DPA of the main charging control module. When the corresponding charging interface of the main charging control module receives the fast charging voltage output by the AC-DC conversion module, the main charging control module outputs the control signal GATE_C1 through the DPA port to open the first PMOS tube, so that the voltage control module provides a non-fast charging voltage to the corresponding charging interface of the slave charging control module.

[0045] The second logic switch comprises a second PMOS tube, a second NPN tube and a second resistor. One end of the second PMOS tube is connected to an output pin of the voltage control module, one end is connected to the second charging interface, and the other end is connected between the second resistor and the second NPN tube. The second resistor is also connected to an output pin of the AC-DC conversion module. The second NPN tube is also connected to a second IO port DMA of the main charging control module. When the fast charging voltage output by the AC-DC conversion module is received by the corresponding charging interface of the slave charging control module, the main charging control module outputs a control signal GATE_C2 through the DMA port to open the second PMOS tube, so that the voltage control module provides a non-fast charging voltage to the corresponding charging interface of the slave charging control module.

[0046] As a more preferred embodiment, the number of voltage control modules is 1. The voltage control module comprises an input pin VIN, an enable pin EN, a ground pin GND and an output pin VOUT. Specifically, the input pin is connected to the output pin of the AC-DC conversion module, the enable pin is connected to the third IO port FB of the main charging control module, and the output pin is connected to the first PMOS tube and the second PMOS tube, respectively, so that the voltage control module provides a non-fast charging voltage to the corresponding charging interface of the slave charging control module or the main charging control module when the first PMOS tube or the second PMOS tube is opened. Optionally, when the voltage control module is a step-down BUCK module, the voltage control module outputs a preset voltage 5V, that is, the voltage control module outputs a 5V voltage to the other charging control module when the main charging control module or the slave charging control module is fast charging. Preferably, the step-down BUCK module adopts TIM2286 produced by Torex Micro. In the embodiment of the application, only one voltage control module is required, and the output flow direction of the voltage control module is controlled by combining the logic switching module, so that the fast charging interface does not need to be distinguished, and any charging interface can be fast charged as long as it is connected to the charging device first, that is, the effect of first insertion and first fast charging of multi-port blind insertion fast charging is realized, so that the use of multi-port fast charging power supply is more reasonable and humanized, and the circuit structure is also simplified, greatly reducing the BOM cost. It should be noted that the voltage control module can also be replaced by a step-up BOOST module or a step-up and step-down BUCK-BOOST module according to needs.

[0047] The embodiment of the application provides a multi-port blind insertion fast charging method, which specifically comprises: synchronizing the charging interface states of a plurality of charging control modules, respectively, when the charging interface corresponding to one of the charging control modules first receives the fast charging voltage output by the AC-DC conversion module, switching the output voltage flow direction of the voltage control module through the logic switching module, so that the voltage control module provides a non-fast charging voltage to the charging interface corresponding to the remaining charging control modules.

[0048] As Figure 2As shown, as one of the embodiments, the charging control module includes a master charging control module and a slave charging control module, and the charging control modules synchronize the respective charging interface states through a communication interface, wherein the communication interface includes any of an IO port or an I2C bus, or a custom communication mode such as a fixed pulse transmission mode through a single-wire protocol. Preferably, the master charging control module and the slave charging control module synchronize the charging interface states once every 50 ms. It should be noted that during the circuit initialization process, after the master charging control module and the slave charging control module are confirmed, the master charging control module is defaulted to take control of the optocoupler signal.

[0049] After the master charging control module and the slave charging control module synchronize the respective charging interface states, the method includes:

[0050] Step S1, the master charging control module determines whether the first charging interface and the second charging interface are connected to external devices. If the second charging interface is connected to the charging device earlier than the first charging interface, step S2 is entered. If the first charging interface is connected to the charging device earlier than the second charging interface, step S3 is entered.

[0051] Step S2, the master charging control module controls the change of the optocoupler signal of the optocoupler to make the AC-DC conversion module provide fast charging voltage for the second charging interface, and the master charging control module switches the output voltage flow direction of the voltage control module through the logic switching module to make the voltage control module provide non-fast charging voltage for the first charging interface.

[0052] Step S3, the master charging control module closes the enable of the optocoupler signal pin, and at the same time, the master charging control module opens the enable of the optocoupler signal pin of the slave charging control module to control the change of the optocoupler signal of the optocoupler, thereby making the AC-DC conversion module provide fast charging voltage for the first charging interface, and the master charging control module switches the output voltage flow direction of the voltage control module through the logic switching module to make the voltage control module provide non-fast charging voltage for the second charging interface.

[0053] In the process of executing the step S2 or the step S3, the master charging control module or the slave charging control module controls the photocoupler signal of the photocoupler to change, so that the AC / DC conversion module provides the fast charging voltage for the second charging interface or the first charging interface. The method specifically comprises: the master charging control module compares the current output voltage of the AC / DC conversion module with the application voltage of the charging device obtained by the second charging interface. When the current output voltage of the AC / DC conversion module is less than the application voltage of the charging device obtained by the second charging interface, the master charging control module controls the photocoupler signal of the photocoupler to decrease, so that the AC / DC conversion module increases the output voltage until the current output voltage of the AC / DC conversion module is equal to the application voltage of the charging device obtained by the second charging interface, thereby realizing the provision of the fast charging voltage for the second charging interface. Alternatively, the slave charging control module compares the current output voltage of the AC / DC conversion module with the application voltage of the charging device obtained by the first charging interface. When the current output voltage of the AC / DC conversion module is less than the application voltage of the charging device obtained by the first charging interface, the slave charging control module controls the photocoupler signal of the photocoupler to decrease, so that the AC / DC conversion module increases the output voltage until the current output voltage of the AC / DC conversion module is equal to the application voltage of the charging device obtained by the first charging interface, thereby realizing the provision of the fast charging voltage for the first charging interface. The application voltage of the charging device meets the requirement of the fast charging voltage, for example, 9V / 3A, 12V / 3A, 15V / 3A or 20V / 4.5A specified by the PD protocol, etc. The non-fast charging voltage refers to 5V / 1A or 5V / 3A, etc. It needs to be noted that the fast charging and the non-fast charging are a relative concept, and there is no strict dividing line between them. However, obviously, the fast charging voltage is greater than the non-fast charging voltage.

[0054] Specifically, taking the constant voltage loop (CV Loop) as an example, if the second charging interface accesses the charging device and applies a voltage of 9V (assuming that the output voltage of the AC-DC conversion module is 5V), the main charging control module detects the output voltage from the AC-DC conversion module through the first voltage pin, and then closes the conduction of the optocoupler when the current voltage is less than the voltage applied by the charging device. Therefore, the current of the optocoupler becomes small, the current flowing through the light-emitting LED becomes small, and the current fed back to the phototransistor also becomes small. Further, the AC-DC conversion module outputs a larger voltage than the current one until 9V is reached. Then the main charging control module controls the second MOS tube to open through the first drive pin, so that the AC-DC conversion module provides fast charging voltage for the second charging interface. Similarly, when the output voltage of the AC-DC conversion module is greater than the applied voltage of the charging device obtained by the second charging interface, the main charging control module controls the optocoupler signal to become large, so that the AC-DC conversion module reduces the output voltage until the output voltage of the AC-DC conversion module is equal to the applied voltage of the charging device obtained by the second charging interface, and when the output voltage of the AC-DC conversion module is equal to the applied voltage of the charging device obtained by the second charging interface, the main charging control module controls the optocoupler signal to remain unchanged.

[0055] In the process of performing step S2, the method that the main charging control module switches the output voltage flow direction of the voltage control module to make the voltage control module provide non-fast charging voltage to the first charging interface through the logic switching module specifically includes: step S21, the main charging control module sends a control signal to open the enable of the voltage control module through the third IO port; step S22, the main charging control module sends a control signal GATE_C1 to control the first NPN tube to turn on through the first IO port, so that the gate end of the first PMOS tube is pulled down to GND, thereby opening the first PMOS tube, and at the same time, the second NPN tube is closed through the second IO port to send a control signal GATE_C2, so that the gate end of the first PMOS tube is pulled up, thereby cutting off the first PMOS tube, so that the voltage control module provides non-fast charging voltage to the first charging interface. That is, when the second charging interface accesses the charging device first, it has the right to apply fast charging voltage, and the first charging interface can only apply the output voltage allowed by the voltage control module after accessing the charging device.

[0056] In the process of performing step S3, the main charging control module controls the output voltage flow direction of the voltage control module through the logic switching module to make the voltage control module provide the non-fast charging voltage to the second charging interface. The method specifically comprises: step S31, the main charging control module sends a control signal through the third IO port to open the enable of the voltage control module; step S32, the main charging control module sends a control signal GATE_C1 through the first IO port to control the second NPN tube to turn on, so that the gate end of the second PMOS tube is pulled down to GND, thereby opening the second PMOS tube, and at the same time, a control signal GATE_C2 is sent through the second IO port to close the first NPN tube, so that the gate end of the second PMOS tube is pulled up, thereby cutting off the second PMOS tube, so that the voltage control module provides the non-fast charging voltage to the second charging interface. That is, when the first charging interface is connected to the charging device first, it has the right to apply for the fast charging voltage, and the second charging interface can only apply for the output voltage allowed by the voltage control module after being connected to the charging device. Due to the existence of the logic switching module, when the first charging interface is fast charging, the voltage control module can supply power to the second charging interface without resetting the first charging interface and transferring the control right of the optocoupler signal (i.e. the control right of fast charging) to the main charging control module. The method described in the embodiment is more reasonable and humanized, and realizes the effect of multi-port blind plug fast charging of first-in-first-fast charging, that is, any charging interface can fast charge as long as it is connected to the charging device first.

[0057] Obviously, the above-mentioned embodiments are only part of the embodiments of the present application, not all the embodiments, and the technical solutions of each embodiment can be combined with each other. In addition, if the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like appear in the embodiments, the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. If the terms such as "first", "second", "third" and the like appear in the embodiments, they are used for the convenience of distinguishing related features, and cannot be understood as indicating or implying relative importance, order or number of technical features.

[0058] In addition, in the description of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents. The above is only the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and variations to the present application. Any modification, equivalent replacement, improvement, etc. within the spirits and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-port blind-plug fast charging power supply, comprising an AC / DC conversion module, a voltage control module, and a charging control module, characterized in that: Several charging control modules are interconnected to synchronize the status of their respective charging interfaces; One end of the voltage control module is connected to the AC / DC conversion module, and the other end is connected to the logic switching module. When the charging interface of one of the charging control modules first receives the fast charging voltage output by the AC / DC conversion module, the charging interfaces of the other charging control modules receive the non-fast charging voltage output by the voltage control module through the logic switching module. The logic switching module is used to switch the direction of the output voltage of the voltage control module. The multi-port blind-plug fast charging power supply also includes an optocoupler. Several charging control modules are connected to one end of the optocoupler and control the change of the optocoupler's optocoupler signal based on the state of the charging interface. The other end of the optocoupler is connected to an AC / DC conversion module. The AC / DC conversion module changes the output voltage according to the change of the optocoupler's optocoupler signal, so that the charging interface outputs a fast charging voltage.

2. The multi-port blind-plug fast charging power supply according to claim 1, characterized in that, The charging control module includes a main charging control module and a slave charging control module. The main charging control module is connected to the voltage control module. When the charging interface corresponding to the main charging control module receives the fast charging voltage output by the AC / DC conversion module, the main charging control module outputs a control signal to enable the voltage control module to provide a non-fast charging voltage to the charging interface corresponding to the slave charging control module. When the charging interface corresponding to the slave charging control module receives the fast charging voltage output by the AC / DC conversion module, the main charging control module outputs a control signal to enable the voltage control module to provide a non-fast charging voltage to the charging interface corresponding to the main charging control module.

3. A multi-port blind-plug fast charging power supply according to claim 2, characterized in that, The slave charging control module includes a master-slave distinguishing pin, and the master charging control module and slave charging control module are distinguished according to whether the master-slave distinguishing pin is in a pull-up state.

4. A multi-port blind-plug fast charging power supply according to claim 3, characterized in that, The charging interface includes a first charging interface and a second charging interface; wherein the first charging interface is connected to the slave charging control module, and the second charging interface is connected to the master charging control module.

5. A multi-port blind-plug fast charging power supply according to claim 4, characterized in that, The first charging interface is a USB-C1 interface, including a power pin, a ground pin, a first fast charging configuration channel, a second fast charging configuration channel, a positive data pin, and a negative data pin; wherein, The power supply pin is connected to the second voltage pin of the charging control module, the power supply pin is connected to the output pin of the AC / DC conversion module through the first MOSFET, and the power supply pin is connected to the output pin of the voltage control module through the logic switching module. The first MOSFET is controlled by a control signal sent from the first drive pin of the charging control module. The ground pin is connected to the first current detection pin of the charging control module through a resistor, and the ground pin is also connected to the second current detection pin of the charging control module. The first fast charging configuration channel and the second fast charging configuration channel are respectively connected to the corresponding fast charging configuration channel of the charging control module. The positive and negative data pins are connected to the corresponding data pins of the charging control module, respectively.

6. A multi-port blind-plug fast charging power supply according to claim 4, characterized in that, The second charging interface is a USB-C2 interface, including a power pin, a ground pin, a first fast charging configuration channel, a second fast charging configuration channel, a positive data pin, and a negative data pin; wherein, The power supply pin is connected to the second voltage pin of the main charging control module. The power supply pin is also connected to the output pin of the AC / DC conversion module through a second MOSFET. This second MOSFET is controlled by a control signal sent from the first drive pin of the main charging control module. The grounding pin is connected to the first current detection pin of the main charging control module through a resistor, and the grounding pin is also connected to the second current detection pin of the main charging control module. The first and second fast charging configuration channels are respectively connected to the corresponding fast charging configuration channels of the main charging control module. The positive data pin and negative data pin are connected to the corresponding data pins of the main charging control module, respectively.

7. A multi-port blind-plug fast charging power supply according to claim 5 or 6, characterized in that, The logic switching module includes a first logic switch and a second logic switch. The first logic switch is connected to the first charging interface, and the second logic switch is connected to the second charging interface.

8. A multi-port blind-plug fast charging power supply according to claim 7, characterized in that, The first logic switch includes a first PMOS transistor, a first NPN transistor, and a first resistor; wherein, One end of the first PMOS transistor is connected to the output pin of the voltage control module, another end is connected to the first charging interface, and the remaining end is connected between the first resistor and the first NPN transistor. The first resistor is also connected to the output pin of the AC / DC conversion module. The first NPN transistor is also connected to the first I / O port of the main charging control module. When the charging interface corresponding to the main charging control module receives the fast charging voltage output by the AC-DC conversion module, the main charging control module outputs a control signal through the first I / O port to turn on the first PMOS transistor, so that the voltage control module provides a non-fast charging voltage to the charging interface corresponding to the slave charging control module.

9. A multi-port blind-plug fast charging power supply according to claim 7, characterized in that, The second logic switch includes a second PMOS transistor, a second NPN transistor, and a second resistor; wherein, One end of the second PMOS transistor is connected to the output pin of the voltage control module, another end is connected to the second charging interface, and the remaining end is connected between the second resistor and the second NPN transistor. The second resistor is also connected to the output pin of the AC / DC conversion module. The second NPN transistor is also connected to the second I / O port of the main charging control module. When the main charging control module receives the fast charging voltage output by the AC-DC conversion module from the charging interface corresponding to the charging control module, the main charging control module outputs a control signal through the second I / O port to turn on the second PMOS transistor, so that the voltage control module provides a non-fast charging voltage to the charging interface corresponding to the charging control module.

10. A multi-port blind-plug fast charging power supply according to claim 8 or 9, characterized in that, The voltage control module consists of one unit; the voltage control module includes an input pin, an enable pin, a ground pin, and an output pin, wherein... The input pin is connected to the output pin of the AC / DC converter module. The enable pin is connected to the third I / O port of the main charging control module. The output pins are connected to the first PMOS transistor and the second PMOS transistor respectively, so that the voltage control module provides a non-fast charging voltage to the corresponding charging interface of the slave charging control module or the master charging control module when the first PMOS transistor or the second PMOS transistor is turned on.

11. A multi-port blind-plug fast charging power supply according to claim 1, characterized in that, The number of optocouplers is one, with its input end connected to the output pin of the AC / DC conversion module and its output end connected to the optocoupler signal pins of several charging control modules.

12. A multi-port blind-plug fast charging method, characterized in that, The method is implemented based on the multi-port blind-plug fast charging power supply according to any one of claims 1 to 11, and the method specifically includes: Several charging control modules synchronize the status of their respective charging interfaces. When the charging interface of one of the charging control modules first receives the fast charging voltage output by the AC-DC conversion module, the output voltage flow of the voltage control module is switched through the logic switching module, so that the voltage control module provides a non-fast charging voltage to the charging interfaces of the other charging control modules.

13. A multi-port blind-plug fast charging method according to claim 12, characterized in that, The charging control module includes a master charging control module and a slave charging control module. The charging control modules synchronize their respective charging interface status through a communication interface, which includes either an I / O port or an I2C bus.

14. A multi-port blind-plug fast charging method according to claim 13, characterized in that, After synchronizing the charging interface states between the main charging control module and the slave charging control module, the following steps are taken: Step S1: The main charging control module determines whether the first charging interface and the second charging interface are connected to an external device. If the second charging interface is connected to the charging device before the first charging interface, proceed to step S2. If the first charging interface is connected to the charging device before the second charging interface, proceed to step S3. In step S2, the main charging control module controls the change of the optocoupler signal of the optocoupler so that the AC-DC conversion module provides a fast charging voltage to the second charging interface. At the same time, the main charging control module switches the output voltage flow of the voltage control module through the logic switching module so that the voltage control module provides a non-fast charging voltage to the first charging interface. In step S3, the main charging control module disables the enable of its optocoupler signal pin, while enabling the enable of its optocoupler signal pin in the slave charging control module to control the change of the optocoupler signal, thereby enabling the AC / DC conversion module to provide fast charging voltage to the first charging interface. At the same time, the main charging control module switches the output voltage flow of the voltage control module through the logic switching module so that the voltage control module provides non-fast charging voltage to the second charging interface.

15. A multi-port blind-plug fast charging method according to claim 14, characterized in that, In step S2 or S3, the method by which the main charging control module or the slave charging control module controls the change of the optocoupler signal of the optocoupler so that the AC / DC conversion module provides fast charging voltage to the second charging interface or the first charging interface specifically includes: The main charging control module compares the current output voltage of the AC / DC conversion module with the requested voltage of the charging device obtained by the second charging interface. When the current output voltage of the AC / DC conversion module is less than the requested voltage of the charging device obtained by the second charging interface, the main charging control module controls the optocoupler signal to decrease, thereby causing the AC / DC conversion module to increase the output voltage until the current output voltage of the AC / DC conversion module is equal to the requested voltage of the charging device obtained by the second charging interface, thereby providing fast charging voltage to the second charging interface. Alternatively, the charging control module compares the current output voltage of the AC / DC conversion module with the requested voltage of the charging device obtained by the first charging interface. When the current output voltage of the AC / DC conversion module is less than the requested voltage of the charging device obtained by the first charging interface, the charging control module controls the optocoupler signal to decrease, thereby increasing the output voltage of the AC / DC conversion module until the current output voltage of the AC / DC conversion module is equal to the requested voltage of the charging device obtained by the first charging interface, thereby providing fast charging voltage to the first charging interface. The voltage applied for by the charging equipment must meet the requirements for fast charging voltage.

16. A multi-port blind-plug fast charging method according to claim 14, characterized in that, In step S2, the method by which the main charging control module switches the output voltage flow of the voltage control module through the logic switching module to enable the voltage control module to provide a non-fast charging voltage to the first charging interface specifically includes: Step S21: The main charging control module sends a control signal through the third IO port to enable the voltage control module; In step S22, the main charging control module sends a control signal through the first IO port to control the first NPN transistor to turn on, thereby turning on the first PMOS transistor. At the same time, it sends a control signal through the second IO port to turn off the second NPN transistor, thereby enabling the voltage control module to provide a non-fast charging voltage to the first charging interface.

17. A multi-port blind-plug fast charging method according to claim 14, characterized in that, In step S3, the method by which the main charging control module switches the output voltage flow of the voltage control module through the logic switching module to enable the voltage control module to provide a non-fast charging voltage to the second charging interface specifically includes: Step S31: The main charging control module sends a control signal through the third IO port to enable the voltage control module; In step S32, the main charging control module sends a control signal through the first IO port to control the second NPN transistor to turn on, thereby turning on the second PMOS transistor. At the same time, it sends a control signal through the second IO port to turn off the first NPN transistor, thereby enabling the voltage control module to provide a non-fast charging voltage to the second charging interface.

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