Charging control circuit and charging device

Abstract

The utility model relates to the technical field of power electronics, and discloses a charging control circuit and a charging device.The charging control circuit comprises a protocol control module, a main control module, a power input module, a power conversion module, a frequency conversion rectification module and an output interface module, and the power input module, the power conversion module, the frequency conversion rectification module and the output interface module are electrically connected in sequence; the power input module is used for accessing a power supply. The output interface module is used for connecting a load. The protocol control module is used for collecting load connection information through the output interface module, the main control module is used for controlling the power conversion module according to the load connection information, and then the frequency conversion rectification module carries out frequency modulation rectification on signals output by the power conversion module and outputs the signals to the output interface module so as to provide voltage needed by a load. According to the invention, the efficiency loss caused by the multi-path output design is reduced, the output of the circuit is changed by changing the rectification frequency, the efficiency of the circuit is greatly improved, and the design complexity and cost are greatly reduced.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and in particular to a charging control circuit and a charging device. Background Technology

[0002] With the continuous advancement of technology and the increasingly widespread use of mobile devices, the demand for portable charging devices is also growing. Consequently, chargers have become an indispensable part of our daily lives.

[0003] As consumers carry more and more multimedia products, single-port chargers are increasingly unable to meet their needs. Against this backdrop, multi-port chargers have emerged. Existing multi-port chargers utilize multiple AC-DC or DC-DC technologies. While these technologies offer more interfaces and more flexible voltage selection, they are complex to design and costly. They also result in higher standby power consumption and efficiency losses; typically, standby power consumption is two to three times that of a single-port design, and efficiency losses exhibit a similar additive effect. Utility Model Content

[0004] In view of this, embodiments of this application provide a charging control circuit and a charging device, which can effectively solve the problems of complex charger design and high cost caused by the use of multiple AC-DC or multiple DC-DC technologies in existing multi-port chargers. These problems also result in high standby power consumption and efficiency loss in the products.

[0005] In a first aspect, embodiments of this application provide a charging control circuit, including:

[0006] The system comprises a protocol control module, a main control module, and a power input module, a power conversion module, a frequency converter and rectifier module, and an output interface module connected in sequence and electrically. The main control module is connected to both the power conversion module and the protocol control module, and the protocol control module is connected to the output interface module. The power input module is used to connect to a power source, and the output interface module is used to connect to a load.

[0007] The protocol control module is used to collect load connection information through the output interface module. The main control module is used to control the power conversion module according to the load connection information. Then, the frequency conversion rectifier module performs frequency modulation and rectification on the signal output by the power conversion module and outputs it to the output interface module to provide the voltage required by the load.

[0008] In some embodiments, the output interface module comprises at least two interface units, and the charging control circuit further comprises a channel switching module, an input end of the channel switching module is connected to an output end of the frequency conversion rectification module, an output end of the channel switching module is electrically connected to the output interface module, and a control end of the channel switching module is in communication connection with the protocol control module.

[0009] The protocol control module is configured to control the channel switching module according to a load connection state of each interface unit, to switch a communication state between the output end of the frequency conversion rectification module and the corresponding interface unit, thereby providing a voltage signal required by a connected corresponding load.

[0010] In some embodiments, the channel switching module comprises at least two channel switching units which are the same in number as the interface units and are correspondingly arranged, an input end of each channel switching unit is connected to the output end of the frequency conversion rectification module, a control end of each channel switching unit is electrically connected to the protocol control module, and an output end of each channel switching unit is respectively and correspondingly electrically connected to each interface unit.

[0011] In some embodiments, the frequency conversion rectification module comprises a frequency adjustment unit and an output rectification unit, the frequency adjustment unit is electrically connected to the power conversion module, and the output rectification unit is electrically connected to the frequency adjustment unit, the output interface module and the power conversion module respectively, wherein the output rectification unit is a synchronous rectifier.

[0012] In some embodiments, the frequency conversion rectification module further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor, one end of the first resistor is connected to an output end of the power conversion module, one end of the first resistor is connected to an input end of the output rectification unit, the other end of the first resistor is connected to one end of the first capacitor, the other end of the first capacitor is connected to one end of the output interface module, and the other end of the first capacitor is connected to an output end of the output rectification unit.

[0013] One end of the second capacitor is connected to an output end of the power conversion module, the other end of the second capacitor is electrically connected to the frequency adjustment unit, the second resistor is connected in series between the frequency adjustment unit and a control end of the output rectification unit, one end of the third resistor is connected to an output end of the output rectification unit, the other end of the third resistor is electrically connected to the frequency adjustment unit, one end of the fourth resistor is connected to an input end of the output rectification unit, and the other end of the fourth resistor is electrically connected to the frequency adjustment unit.

[0014] In some embodiments, the master module comprises a master chip, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first inductor, a first diode, a third capacitor, a fourth capacitor and a fifth capacitor, one end of the fifth resistor is electrically connected with the master chip, the other end of the fifth resistor is electrically connected with the power conversion module, the sixth resistor, the first diode, the seventh resistor and the first inductor are connected in series between the other end of the fifth resistor and the master chip in sequence.

[0015] One end of the third capacitor is connected with the negative electrode of the first diode, the other end of the third capacitor is grounded, the fourth capacitor is connected with the third capacitor in parallel, one end of the eighth resistor is connected with one end of the fifth resistor, the other end of the eighth resistor is grounded, one end of the fifth capacitor is electrically connected with the master chip, the other end of the fifth capacitor is grounded, one end of the ninth resistor is electrically connected with the master chip, the other end of the ninth resistor is grounded.

[0016] In some embodiments, the charging control circuit further comprises an isolation communication module, one end of the isolation communication module is electrically connected with the master module, the other end of the isolation communication module is electrically connected with the protocol control module, and the isolation communication module is used for electrically isolating the master module and the protocol control module.

[0017] In some embodiments, the power input module further comprises an input filter unit, the input end of the input filter unit is used for connecting the power supply, and the output end of the input filter unit is electrically connected with the power conversion module.

[0018] In some embodiments, the power input module further comprises an input rectifier unit, the input end of the input rectifier unit is electrically connected with the output end of the input filter unit, and the output end of the input rectifier unit is connected with the input end of the power conversion module.

[0019] In the second aspect, the embodiments of the present application provide a charging device, the charging device comprising at least one charging control circuit in the first aspect.

[0020] The embodiments of the present application have the following beneficial effects:

[0021] The charging control circuit of the application comprises a protocol control module, a main control module and sequentially electrically connected power input module, power conversion module, frequency conversion rectification module and output interface module; the main control module is connected with the power conversion module and the protocol control module respectively, the protocol control module is connected with the output interface module; the power input module is used for connecting power, the output interface module is used for connecting load; the protocol control module is used for collecting load connection information through the output interface module, the main control module is used for controlling the power conversion module according to the load connection information, and then the frequency conversion rectification module is used for frequency conversion rectification of the signal output by the power conversion module and output to the output interface module to provide the voltage required by the load. The single AC-DC technology is used to realize multi-voltage output, and the efficiency loss caused by multi-path design is reduced. And by changing the rectification frequency to change the output of the circuit, the circuit outputs low frequency when the load is light to reduce the loss, and outputs high frequency when the load is heavy to maintain the stability of the output voltage, thereby greatly improving the efficiency of the circuit. And the circuit structure is simple, which greatly reduces the design complexity and cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0023] Figure 1 A first structure schematic diagram of the charging control circuit of the embodiment of the application is shown;

[0024] Figure 2 A circuit schematic diagram of the channel switching module of the embodiment of the application is shown;

[0025] Figure 3 A circuit schematic diagram of the frequency conversion rectification module of the embodiment of the application is shown;

[0026] Figure 4 A circuit schematic diagram of the power input module, the power conversion module and the main control module of the embodiment of the application is shown.

[0027] Main element symbol explanation:

[0028] 10: protocol control module; 20: main control module; 30: power input module; 40: power conversion module; 50: frequency conversion rectification module; 60: output interface module; 80: channel switching module;

[0029] 601: first interface unit; 602: second interface unit; 801: first channel switching unit; 802: second channel switching unit. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0031] The components of the embodiments of the present application generally described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0032] Hereinafter, the terms "include", "have", and their conjugates used in the various embodiments of the present application are only intended to denote a certain characteristic, number, step, operation, element, component, or a combination thereof, and should not be construed as excluding the existence or possibility of one or more other characteristics, numbers, steps, operations, elements, components, or combinations thereof. In addition, the terms "first", "second", "third", and the like are used only to distinguish the description, and should not be understood as indicating or implying relative importance.

[0033] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present application belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the contextual meaning in the relevant technical field and will not be interpreted in an idealized or overly formal sense, unless clearly defined in the various embodiments of the present application.

[0034] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] Considering that the multi-port charger in the prior art utilizes multi-path AC-DC technology or multi-path DC-DC, resulting in complex charger design, high cost, and high standby power consumption and efficiency loss of the product. The application provides a charging control circuit and a charging device, which utilizes single-path AC-DC technology to achieve multi-voltage output, reduces the efficiency loss caused by multi-path design. And by changing the rectification frequency to change the output of the circuit, the circuit outputs at low frequency to reduce the loss when the load is light, and outputs at high frequency to maintain the stability of the output voltage when the load is heavy, thereby greatly improving the efficiency of the circuit. And the circuit structure is simple, which greatly reduces the design complexity and cost.

[0036] The charging control circuit will be described below in combination with some specific embodiments.

[0037] Figure 1 A structural schematic diagram of the charging control circuit of the embodiment of the application is shown. Exemplarily, the charging control circuit is arranged in a charging device and is electrically connected with a load through an output interface module 60 to supply power for the load. Exemplarily, the charging control circuit comprises a protocol control module 10, a master control module 20, and a power input module 30, a power conversion module 40, a variable-frequency rectification module 50, and an output interface module 60 connected in sequence, specifically, an input end of the power input module 30 is used to connect a power supply, an output end of the power input module 30 is connected with an input end of the power conversion module 40, an output end of the power conversion module 40 is connected with an input end of the variable-frequency rectification module 50, and an output end of the variable-frequency rectification module 50 is connected with the output interface module 60. The master control module 20 is connected with the power conversion module 40 and the protocol control module 10 respectively, and the protocol control module 10 is electrically connected with the output interface module 60; the output interface module is used to connect the load.

[0038] The power input module 30 can be set according to actual application conditions, and a filtering module can be arranged in the power input module 30 to filter the signal of the power supply, or a rectification module can be arranged in the power input module 30 to rectify the signal of the power supply.

[0039] One end of the protocol control module 10 is communicatively connected with the load through the output interface module 60, and the other end of the protocol control module 10 is electrically connected with the master control module 20. The protocol control module 10 collects the load connection information through the output interface module 60 and is used to transmit the power supply signal required by the load to the master control module 20. It can be understood that any kind of communication chip can be arranged in the protocol control module 10, and the protocol control module 10 can communicate with the load through any kind of protocol. Exemplarily, the protocol control module 10 communicates with the load through the PD2.0 or PD3.0 protocol to obtain the power supply signal required by the load.

[0040] It can be understood that the power conversion module 40 can be a transformer, which converts the high-voltage signal of the primary side into a low-voltage signal through electromagnetic energy conversion and transmits it to the frequency conversion rectification module 50. The primary side of the transformer is electrically connected with the master control module 20. The master control module controls the power conversion module 40 according to the signal of the protocol control module 10, that is, the power supply signal required by the load, and then the frequency conversion rectification module 50 outputs the signal output by the power conversion module 40 to the output interface module 60 after frequency conversion and rectification, so as to provide the voltage required by the load.

[0041] Specifically, the master control module 20 controls the output of the transformer by controlling the switching frequency of the built-in power device, that is, by controlling the duty cycle of the pulse signal output to the power device. When the power signal output by the power conversion module 40 is small, the frequency conversion rectification module 50 reduces the rectification frequency to reduce the loss; when the power signal output by the power conversion module 40 is large, the rectification frequency is increased to maintain the stability of the output voltage.

[0042] The working process of the charging control circuit of the embodiment is as follows: the protocol control module 10 communicates with the load through the output interface module 60, obtains the power supply signal required by the load, and transmits the power supply signal to the master control module 20. The master control module 20 outputs a pulse signal to control the built-in power device according to the power supply signal, so that the power conversion module 40 outputs a power signal, so that the frequency conversion rectification module 50 changes the rectification frequency according to the power signal output by the power conversion module 40, thereby changing the output value of the signal output by the output interface module 60.

[0043] Further, the output interface module 60 can be connected with multiple loads. The protocol control module monitors the number of loads through the output interface module 60. When the protocol control module monitors a single load, the voltage required by the single load is transmitted to the master control module 20, and the master control module outputs a corresponding pulse signal to control the output of the power conversion module 40, so that the frequency conversion rectification module 50 outputs a rectification frequency according to the power signal of the power conversion module 40.

[0044] When the protocol control module monitors at least two loads, the protocol control module 10 communicates with multiple loads respectively, obtains the power supply signals required by each load, and transmits each power supply signal to the master control module 20. The master control module 20 outputs a periodically switched pulse signal to control the power conversion module 40 according to each power supply signal, so that the frequency conversion rectification module 50 generates multiple rectification frequencies according to the periodically changed power signals of the power conversion module 40. The multiple rectification frequencies are rapidly and periodically switched, that is, each load can be powered at the same time.

[0045] The number of loads and the switching period can be set according to actual application. Exemplarily, the output end of the power input module 30 is connected to two loads, and the required power supply signals of the two loads are 5V and 9V respectively. The dual-voltage is switched at a frequency of 50ms.

[0046] The charging control circuit of the embodiment communicates with the load through the protocol control module 10, acquires the power supply voltage of the load, and transmits the power supply voltage of the load to the main control module 20, so that the main control module 20 changes the output of the power conversion module 40 through the control of the built-in power device, so that the variable frequency rectification module 50 provides the required power supply voltage for the load by changing the rectification frequency, thereby realizing the multi-voltage output by using single AC-DC technology, changing the output of the circuit by using the variable frequency rectification module 50 to change the frequency, reducing the voltage loss of 2%, reducing the efficiency loss caused by multi-path design, greatly improving the efficiency of the circuit, and greatly reducing the design complexity and cost.

[0047] In an embodiment, on the basis of the above-mentioned embodiment, Figure 2 The circuit schematic of the channel switching module 80 of the embodiment is shown. The charging control circuit further comprises a channel switching module 80, the input end of the channel switching module 80 is connected to the output end of the variable frequency rectification module 50, the output end of the channel switching module 80 is electrically connected with the output interface module 60, and the control end of the channel switching module 80 is in communication connection with the protocol control module 10.

[0048] The protocol control module 10 is used to control the channel switching module 80 according to the load connection state of each interface unit, so as to switch the communication state between the output end of the variable frequency rectification module 50 and the corresponding interface unit, thereby providing the required voltage signal of the connected corresponding load.

[0049] It can be understood that the output end of the channel switching module 80 can be set according to actual application. If it is required to supply power to two loads, two output ends can be set. If it is required to supply power to three loads, three output ends can be set.

[0050] Exemplarily, the channel switching module 80 comprises two channel switching units, the output interface module 60 comprises two interface units, the two interface units are arranged correspondingly with the channel switching units, the input end of the first channel switching unit 801 is connected with the output end of the frequency conversion rectification module 50, the output end of the first channel switching unit 801 is connected with the first interface unit 601, the control end of the first channel switching unit 801 is connected with the protocol control module 10 in communication, the input end of the second channel switching unit 802 is connected with the output end of the frequency conversion rectification module 50, the output end of the second channel switching unit 802 is connected with the second interface unit 602, and the control end of the second channel switching unit 802 is connected with the protocol control module 10 in communication. The channel switching units can be arranged according to actual application conditions, and exemplarily, a switch tube is arranged in each channel switching unit, and the protocol control module 10 controls the signal flow direction of the frequency conversion rectification module 50 by controlling the conduction and shutdown of the switch tube.

[0051] Specifically, when the protocol control module 10 detects that the first interface unit 601 is connected with a load, the first channel switching unit 801 is controlled to be conducted, so that the signal of the frequency conversion rectification module 50 flows to the first interface unit 601, when the protocol control module 10 detects that the second interface unit 602 is connected with a load, the second channel switching unit 802 is controlled to be conducted, so that the signal of the frequency conversion rectification module 50 flows to the second interface unit 602, and when the protocol control module 10 detects that the first interface unit 601 and the second interface unit 602 are both connected with loads, the first channel switching unit 801 and the second channel switching unit 802 are controlled to be alternately conducted and shut down, so as to supply power to two loads.

[0052] The charging control circuit of the embodiment sets the channel switching module 80 to isolate different voltage outputs, and converts the different voltage energy of the frequency conversion rectification module 50 into stable multi-way outputs. The protocol control module 10 can control the signal flowing to the load by controlling the channel switching module 80, so as to realize accurate voltage regulation and distribution, the switch tube can be quickly switched at high frequency, so that the power conversion efficiency is higher, the circuit loss is further reduced, the switch tube can also protect the circuit and the load, and the reliability of the circuit is further improved.

[0053] As an optional solution, Figure 3 The figure is a circuit schematic diagram of the frequency conversion rectification module 50.

[0054] In an embodiment, on the basis of the above-mentioned embodiment, as Figure 3As shown, the frequency conversion rectification module 50 includes a frequency adjustment unit and an output rectification unit. The frequency adjustment unit is electrically connected with the power conversion module 40. The input end of the output rectification unit is connected with the output end of the power conversion module 40. The control end of the output rectification unit is electrically connected with the frequency adjustment unit. The output end of the output rectification unit is connected with the input end of the output interface module 60. The output rectification unit can be set according to the application. Exemplarily, the frequency adjustment unit is a control chip U1, and the output rectification unit is a synchronous rectifier Q2. The control chip U1 changes the switching frequency of the synchronous rectifier Q2, changes the output of the synchronous rectifier Q2, reduces the switching frequency of the synchronous rectifier Q2 when the power signal is small, and increases the switching frequency of the synchronous rectifier Q2 when the power signal is large. The synchronous rectifier Q2 has lower conduction power consumption, can reduce conduction loss, can provide more accurate voltage regulation through synchronous rectification, can make the output voltage more stable, and further enhances the reliability of the system.

[0055] Further, the frequency conversion rectification module 50 further includes a first resistor R1, a second resistor R2, a third resistor R4, a fourth resistor R8, a first capacitor C1 and a second capacitor C2. One end of the first resistor R1 is connected with the output end of the power conversion module 40. One end of the first resistor R1 is connected with the input end of the synchronous rectifier Q2. The other end of the first resistor R1 is connected with one end of the first capacitor C1. The other end of the first capacitor C1 is connected with one end of the output interface module 60. The other end of the first capacitor C1 is connected with the output end of the synchronous rectifier Q2.

[0056] One end of the second capacitor C2 is connected with the output end of the power conversion module 40. The other end of the second capacitor C2 is electrically connected with the control chip U1. The second resistor R2 is connected in series between the synchronous rectifier Q2 and the control end of the control chip U1. One end of the third resistor R4 is connected with the output end of the control chip U1. The other end of the third resistor R4 is electrically connected with the synchronous rectifier Q2. One end of the fourth resistor R8 is connected with the input end of the synchronous rectifier Q2. The other end of the fourth resistor R8 is electrically connected with the control chip U1. By setting the resistor and the capacitor, the stability and reliability of the circuit are further ensured.

[0057] As an optional solution, Figure 4 As shown, it is a circuit schematic diagram of the power input module 30, the power conversion module 40 and the main control module 20.

[0058] In an embodiment, on the basis of the above-mentioned embodiment, as Figure 4As shown, the power input module 30 further comprises: an input filter unit and an input rectifier unit, the input end of the input filter unit is used for inputting power, the output end of the input filter unit is connected to the input end of the input rectifier unit, and the output end of the output rectifier unit is electrically connected to the transformer T1 of the power conversion module 40. Demonstratively, a filter LF1 is arranged in the input filter unit, and the filter LF1 is used for filtering the signal of the power, a rectifier bridge BD1 is arranged in the input rectifier unit, and the rectifier bridge BD1 is used for rectifying the filtered signal, the filter LF1 can filter out high-frequency noise and interference signals, prevent noise in the power supply system from flowing to the load, greatly improve the anti-interference ability of the system, and ensure that the circuit can work stably in an electromagnetic environment.

[0059] The rectifier bridge BD1 can convert alternating current into direct current, full-wave rectification can output higher average voltage, and the ripple is smaller, the efficiency is higher, the signal quality is greatly improved, and the reliability and stability of the overall system are improved.

[0060] In an embodiment, on the basis of the above-mentioned embodiment, as shown in the figure, Figure 4 As shown, the main control module comprises: a main control chip U2, a fifth resistor R9, a sixth resistor R10, a seventh resistor R11, an eighth resistor R12, a ninth resistor R13, a first inductor L2, a first diode D2, a third capacitor EC6, a fourth capacitor C4 and a fifth capacitor C6, one end of the fifth resistor R9 is electrically connected to the main control chip U1, the other end of the fifth resistor R9 is electrically connected to the transformer T1, the sixth resistor R10, the first diode D2, the seventh resistor R11 and the first inductor L2 are connected in series between the other end of the fifth resistor R9 and the main control chip U2.

[0061] One end of the third capacitor EC6 is connected to the negative electrode of the first diode D2, the other end of the third capacitor EC6 is grounded, the fourth capacitor C4 is connected in parallel with the third capacitor EC6, one end of the eighth resistor R12 is connected to one end of the fifth resistor R9, the other end of the eighth resistor R12 is grounded, one end of the fifth capacitor R9 is electrically connected to the main control chip U2, the other end of the second capacitor C6 is grounded, one end of the ninth resistor R13 is electrically connected to the main control chip U2, and the other end of the ninth resistor R13 is grounded. Greatly guarantee the stability and reliability of the circuit.

[0062] In an embodiment, on the basis of the above-mentioned embodiment, the charging control circuit further comprises: an isolation communication module, one end of the isolation communication module is electrically connected to the main control module 20, and the other end of the isolation communication module is electrically connected to the protocol control module 10. Demonstratively, the isolation communication module is an optical coupler, and the optical coupler is used for electrical isolation, so that the signals of the protocol control module 10 can be safely and effectively transmitted to the main control module 20, and the stability and reliability of the circuit are further enhanced.

[0063] The charging device can be a mobile charger, such as a power bank or the like, or an adapter. The charging device is exemplarily a mobile charger, and the charging device includes at least two charging interfaces, each of which is an interface unit and is electrically connected to the output end of each channel switching unit in the charging control circuit. It should be understood that the first charging interface and the second charging interface can be the same type of interface, or the first charging interface and the second charging interface can be different types of interfaces, which can be set according to actual application conditions.

[0064] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are only schematic, for example, the flowcharts and structural diagrams in the drawings show the possible implementation architectures, functions and operations of the devices, methods and computer program products according to the embodiments of the present application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment or a part of code, which includes one or more executable instructions for implementing the specified logical functions. It should also be noted that, in alternative implementations, the functions noted in the blocks can occur in different orders from those noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can also be executed in reverse order, depending on the functions involved. It should also be noted that each block in the structural diagram and / or flowchart, and the combination of blocks in the structural diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0065] In addition, each functional module or unit in the embodiments of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0066] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application.

[0067] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A charge control circuit characterized by comprising: The application relates to a power supply device, which comprises a protocol control module, a main control module and sequentially electrically connected power input module, power conversion module, frequency conversion rectification module and output interface module. The main control module is connected with the power conversion module and the protocol control module, and the protocol control module is electrically connected with the output interface module; the power input module is used for connecting power supply, and the output interface module is used for connecting load. The protocol control module is used for collecting load connection information through the output interface module, and the main control module is used for controlling the power conversion module according to the load connection information, and then the frequency conversion rectification module is used for frequency conversion rectification of the signal output by the power conversion module and then output to the output interface module, so as to provide the voltage required by the load. The output interface module comprises at least two interface units, and the charging control circuit further comprises a channel switching module, the input end of the channel switching module is connected with the output end of the frequency conversion rectification module, the output end of the channel switching module is electrically connected with the output interface module, and the control end of the channel switching module is in communication connection with the protocol control module.

2. The charge control circuit according to claim 1, characterized by, The protocol control module is used for controlling the channel switching module according to the load connection state of each interface unit, so as to switch the communication state between the output end of the frequency conversion rectification module and the corresponding interface unit, thereby providing the voltage signal required by the connected corresponding load. The channel switching module comprises at least two channel switching units which are arranged in correspondence with the number of the interface units, the input end of each channel switching unit is connected with the output end of the frequency conversion rectification module, the control end of each channel switching unit is electrically connected with the protocol control module, and the output end of each channel switching unit is respectively and correspondingly electrically connected with each interface unit.

3. The charge control circuit according to claim 2, characterized by The frequency conversion rectification module comprises a frequency adjustment unit and an output rectification unit, the frequency adjustment unit is electrically connected with the power conversion module, and the output rectification unit is electrically connected with the frequency adjustment unit, the output interface module and the power conversion module.

4. The charge control circuit according to claim 1, characterized by The output rectification unit is a synchronous rectifier. The frequency conversion rectification module further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor, one end of the first resistor is connected with the output end of the power conversion module, one end of the first resistor is connected with the input end of the output rectification unit, the other end of the first resistor is connected with one end of the first capacitor, the other end of the first capacitor is connected with one end of the output interface module, and the other end of the first capacitor is connected with the output end of the output rectification unit.

5. The charge control circuit according to claim 4, characterized by ​ One end of the second capacitor is connected to an output end of the power conversion module, the other end of the second capacitor is electrically connected with the frequency adjustment unit, the second resistor is connected in series between the frequency adjustment unit and a control end of the output rectification unit, one end of the third resistor is connected to an output end of the output rectification unit, the other end of the third resistor is electrically connected with the frequency adjustment unit, one end of the fourth resistor is connected to an input end of the output rectification unit, the other end of the fourth resistor is electrically connected with the frequency adjustment unit.

6. The charge control circuit according to claim 1, wherein The master control module comprises a master control chip, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first inductor, a first diode, a third capacitor, a fourth capacitor and a fifth capacitor, one end of the fifth resistor is electrically connected with the master control chip, the other end of the fifth resistor is electrically connected with the power conversion module, the sixth resistor, the first diode, the seventh resistor and the first inductor are connected in series between the other end of the fifth resistor and the master control chip in sequence; One end of the third capacitor is connected to a negative electrode of the first diode, the other end of the third capacitor is grounded, the fourth capacitor is connected in parallel with the third capacitor, one end of the eighth resistor is connected to one end of the fifth resistor, the other end of the eighth resistor is grounded, one end of the fifth capacitor is electrically connected with the master control chip, the other end of the fifth capacitor is grounded, one end of the ninth resistor is electrically connected with the master control chip, the other end of the ninth resistor is grounded.

7. The charge control circuit according to claim 1, wherein The charging control circuit further comprises an isolation communication module, one end of the isolation communication module is electrically connected with the master control module, the other end of the isolation communication module is electrically connected with the protocol control module, and the isolation communication module is used for electrically isolating the master control module from the protocol control module.

8. The charge control circuit according to claim 1, characterized by The power input module further comprises an input filter unit, an input end of the input filter unit is used for connecting the power supply, and an output end of the input filter unit is electrically connected with the power conversion module.

9. The charge control circuit according to claim 8, characterized by The power input module further comprises an input rectification unit, an input end of the input rectification unit is electrically connected with an output end of the input filter unit, and an output end of the input rectification unit is connected to an input end of the power conversion module.

10. A charging device, characterized by The charging device comprises the charging control circuit according to any one of claims 1-9.

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