Charging system

Abstract

The utility model relates to a charging system. The charging system comprises a master device and a slave device, the master device comprises a first control circuit, a first port and a power supply circuit, the first port and the power supply circuit are electrically connected with the first control circuit, and the power supply circuit is further electrically connected with the first port; the slave device comprises a second control circuit and a second port electrically connected with the second control circuit; when the second port is connected with the first port in an inserted mode, the voltage of the first port changes, and the first control circuit controls the power supply circuit to supply power to the first port based on the voltage change of the first port, so that the second control circuit is powered on through the first port and the second port. According to the invention, the detection of plugging the slave device to the master device and the power management can be realized without additionally arranging a Hall sensor or a contact sensor, so that the device structure can be simplified, the cost can be saved, and the assembly process can be simplified.

Description

Technical Field

[0001] This application belongs to the technical field of charging, and particularly relates to a charging system. Background Art

[0002] At present, for some devices that can be in a split or combined state, there are generally power and communication interfaces between the devices. Usually, the device that receives electric energy is called a slave device, and the device that provides electric energy is called a master device. In related technologies, common power management methods for slave devices in the shutdown state can use Hall sensors and contact sensors. When the Hall sensor or contact sensor detects the presence of the slave device, the master device turns on the power to power on the slave device. However, using Hall sensors and contact sensors for power management of slave devices will increase costs and assembly difficulties. Summary of the Utility Model

[0003] This application provides a charging system to solve the technical problems of high cost and great assembly difficulty in power management of slave devices.

[0004] To solve the above technical problems, a technical solution adopted in this application is: a charging system, the charging system includes: a master device, including a first control circuit, a first port electrically connected to the first control circuit respectively, and a power supply circuit, the power supply circuit is also electrically connected to the first port; a slave device, including a second control circuit, a second port electrically connected to the second control circuit; wherein, when the second port is plugged into the first port, the voltage of the first port changes, and the first control circuit controls the power supply circuit to supply power to the first port based on the voltage change of the first port, so as to power on the second control circuit through the first port and the second port; the slave device is also provided with an adjustment circuit electrically connected to the second port, and the adjustment circuit adjusts the voltage of the second port when the second port is plugged into the first port, so as to cause the voltage of the first port to change.

[0005] According to an embodiment of this application, the adjustment circuit is also electrically connected to the second control circuit, and after the second control circuit is powered on, it controls the adjustment circuit to turn off the voltage adjustment of the second port, so that the second control circuit performs data transmission with the first control circuit through the second port and the first port.

[0006] According to an embodiment of the present application, the first port is provided with a first power supply terminal and a first communication terminal, the second port is provided with a second power supply terminal and a second communication terminal. When the first port is plugged into the second port, the first power supply terminal is electrically connected to the second power supply terminal, and the first communication terminal is electrically connected to the second communication terminal; the first power supply terminal is electrically connected to the power supply circuit, and the first communication terminal is electrically connected to the first control circuit respectively; the second power supply terminal is electrically connected to the second control circuit, and the adjustment circuit is electrically connected to the second communication terminal.

[0007] According to an embodiment of the present application, the first communication terminal includes a first sending terminal and a first receiving terminal, the second communication terminal includes a second sending terminal and a second receiving terminal, and the adjustment circuit includes: a first switching tube, the control end of the first switching tube is connected to a first voltage, and the first communication end of the first switching tube is electrically connected to the second sending terminal; a second switching tube, the control end of the second switching tube is connected to a second voltage and is electrically connected to the second communication end of the first switching tube, the third communication end of the second switching tube is grounded, and the fourth communication end of the second switching tube is electrically connected to the second receiving terminal; when the first port is not plugged into the second port, the first sending terminal and the first receiving terminal are in a first voltage state; when the second port is plugged into the first port, the first sending terminal is electrically connected to the second sending terminal, so that the first switching tube is turned on, thereby causing the second switching tube to be turned on, and further causing the voltage of the second receiving terminal to be pulled to the second voltage state, causing the voltage of the first receiving terminal to change; wherein, the first voltage state and the second voltage state are different.

[0008] According to an embodiment of the present application, the control end of the first switching tube is grounded through a first pull-down resistor, and the control end of the second switching tube is grounded through a second pull-down resistor. When the first port is not plugged into the second port, the first sending terminal and the first receiving terminal are in a pull-up state; when the second port is plugged into the first port, the first sending terminal is electrically connected to the second sending terminal, so that the first switching tube is turned on, thereby causing the second switching tube to be turned on, and further causing the voltage of the second receiving terminal to be pulled down, causing the voltage of the first receiving terminal to decrease.

[0009] According to an embodiment of the present application, the second sending terminal, the second receiving terminal and the control end of the first switching tube are also electrically connected to the second control circuit; after the second control circuit is powered on, it outputs to control the first switching tube to turn off, thereby controlling the second switching tube to turn off.

[0010] According to an embodiment of the present application, the power supply circuit is provided with an enable terminal and a power supply terminal. The enable terminal is connected to the first control circuit, and the power supply terminal is connected to the first port. When the voltage of the first port changes, the first control circuit generates an enable signal and transmits it to the enable terminal, so that the power supply circuit supplies power to the first port through the power supply terminal.

[0011] According to an embodiment of the present application, the slave device further includes a battery. When the power supply circuit charges the slave device, the power supply circuit can charge the battery. A charging integrated circuit is provided in the slave device. One end of the charging integrated circuit is electrically connected to the battery, and the other end of the charging integrated circuit is electrically connected to the second port through.

[0012] According to an embodiment of the present application, the first voltage state is a high level state, and the second voltage state is a low level state.

[0013] According to an embodiment of the present application, both the first port and the second port include an asynchronous transceiver.

[0014] The beneficial effects of the present application are as follows: The charging system of the present application includes a master device and a slave device. The master device includes a first control circuit, a first port electrically connected to the first control circuit respectively, and a power supply circuit. The power supply circuit is also electrically connected to the first port. The slave device includes a second control circuit and a second port electrically connected to the second control circuit. When the second port is plugged into the first port, the voltage of the first port changes. The first control circuit controls the power supply circuit to supply power to the first port based on the voltage change of the first port, so as to power on the second control circuit through the first port and the second port. The slave device is also provided with an adjustment circuit electrically connected to the second port. The adjustment circuit adjusts the voltage of the second port when the second port is plugged into the first port, so that the voltage of the first port changes. The adjustment circuit adjusts the voltage of the second port when the second port is plugged into the first port, so that the voltage of the first port changes. Through the above method, there is no need to additionally set a sensor structure to realize the power management of the slave device plugged into the master device, thereby reducing the production cost, simplifying the device structure and saving the assembly time. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0016] Figure 1It is a schematic circuit diagram of an embodiment of the charging system of the present application;

[0017] Figure 2 It is a schematic circuit diagram of the main device of an embodiment of the charging system of the present application;

[0018] Figure 3 It is a schematic circuit diagram of the slave device of an embodiment of the charging system of the present application. Detailed implementation manners

[0019] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0020] Referring to "embodiment" in this text means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0021] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0022] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0023] In the present application, a device equipped with a power source and providing electrical energy externally is called the main device, and a device receiving electrical energy is called the slave device.

[0024] Currently, there are some split and combined devices, such as split speakers, wireless microphones, etc. Generally, there will be power and communication interfaces, such as serial ports, between the split and combined devices. The power management method of the slave device in the shutdown state usually adopts Hall sensors, contact sensors, etc. After the sensor structure such as the Hall sensor or the contact sensor detects that the slave device is in place, the master device turns on the power to power on the slave device, and then communicates with the slave device, so that the slave device enters the boot mode or the charging mode.

[0025] However, when using methods such as Hall sensors and contact sensors to manage the power of the slave device in the shutdown state, at this time, due to the addition of sensors, magnets need to be added between the devices, which will increase the cost and the assembly difficulty.

[0026] In view of this, please refer to Figures 1 to 3 , an embodiment of the present application provides a charging system 10. The charging system 10 includes: a master device 11 and a slave device 12. Among them, the master device 11 includes a first control circuit U1, a first port J1 electrically connected to the first control circuit U1 respectively, and a power supply circuit U4. The power supply circuit U4 is also electrically connected to the first port J1. The slave device 12 includes a second control circuit U2 and a second port J2 electrically connected to the second control circuit U2. When the second port J2 is plugged into the first port J1, the voltage of the first port J1 changes. The first control circuit U1 controls the power supply circuit U4 to supply power to the first port J1 based on the voltage change of the first port J1, so as to power on the second control circuit U2 through the first port J1 and the second port J2. The slave device 12 is also provided with an adjustment circuit 15 electrically connected to the second port J2. The adjustment circuit 15 adjusts the voltage of the second port J2 when the second port J2 is plugged into the first port J1, so as to change the voltage of the first port J1.

[0027] In the present application, when the second port J2 and the first port J1 are not plugged in, at this time, the first port J1 maintains the first voltage state. When the second port J2 and the first port J1 are plugged in, the voltage of the first port J1 changes from the first voltage state to the second voltage state, that is, the voltage of the first port J1 changes. The first control circuit U1 controls the power supply circuit U4 to supply power to the first port J1, so as to power on the second control circuit U2 through the second port J2, so that the slave device 12 powers on and works, and further realizes charging of the slave device 12, etc.

[0028] Specifically, when the first port J1 and the second port J2 are not plugged in, at this time, the first port J1 is in the first voltage state, for example, a high-level state. When the first port J1 and the second port J2 are plugged in, the adjustment circuit 15 adjusts the voltage of the second port J2 so that the voltage of the second port J2 is converted from the first voltage state to the second voltage state. For example, the second voltage state is a low-level state. Therefore, the voltage of the second port J2 is converted from the first voltage state to the second voltage state, that is, from a high-level state to a low-level state. At this time, the first control circuit U1 detects a change in the voltage of the first port J1 and controls the power supply circuit U4 to supply power to the first port J1, so that the second control circuit U2 is powered on, and finally the slave device 12 can be powered on and work.

[0029] Therefore, in the process of the master device 11 charging the slave device 12 in this application, the adjustment circuit 15 is provided, and the voltage of the second port J2 can be changed through the adjustment circuit 15. In the above manner, there is no need to additionally provide a sensor structure to implement the power management of the slave device 12 plugged into the master device 11, thereby reducing the production cost, simplifying the device structure, and saving the assembly time.

[0030] In an embodiment of the present application, the adjustment circuit 15 is also electrically connected to the second control circuit U2. After the second control circuit U2 is powered on, it controls the adjustment circuit 15 to turn off the voltage adjustment of the second port J2, so that the second control circuit U2 can perform data transmission with the first control circuit U1 through the second port J2 and the first port J1.

[0031] Specifically, one end of the adjustment circuit 15 is electrically connected to the second port J2, and the other end of the adjustment circuit 15 is electrically connected to the second control circuit U2. When the second control circuit U2 is powered on, the second control circuit U2 controls the adjustment circuit 15 to be in the off state, and the adjustment circuit 15 no longer controls the voltage change of the second port J2. At this time, the second control circuit U2 directly performs data transmission through the second port J2 and the first port J1.

[0032] In an embodiment of the present application, the first port J1 is provided with a first power supply terminal J11 and a first communication terminal J12, the second port J2 is provided with a second power supply terminal J21 and a second communication terminal J22. When the first port J1 and the second port J2 are plugged in, the first power supply terminal J11 and the second power supply terminal J21 are electrically connected, and the first communication terminal J12 and the second communication terminal J22 are electrically connected; the first power supply terminal J11 is electrically connected to the power supply circuit U4, and the first communication terminal J12 is electrically connected to the first control circuit U1 respectively; the second power supply terminal J21 is electrically connected to the second control circuit U2, and the adjustment circuit 15 is electrically connected to the second communication terminal J22.

[0033] Specifically, when the first port J1 and the second port J2 are plugged in, the first power supply terminal J11 and the second power supply terminal J21 are electrically connected. Under the action of the adjustment circuit 15, the voltage of the first port J1 is converted from the first voltage state to the second voltage state. For example, a high level is converted to a low level. At this time, the first control circuit U1 can control the power supply circuit U4 to supply power to the first power supply terminal J11, and then the second power supply terminal J21 is powered on. Since the second power supply terminal J21 is electrically connected to the second control circuit U2, at this time, the second control circuit U2 is powered on. Further, when the first port J1 and the second port J2 are plugged in, the first communication terminal J12 and the second communication terminal J22 are electrically connected. And when the second control circuit U2 is powered on, it controls the adjustment circuit 15 to turn off. At this time, the first power supply terminal J11 and the second power supply terminal J21 are in the first voltage state, and the first control circuit U1 and the second control circuit U2 are directly connected through the first communication terminal J21 and the second communication terminal J22, and the first control circuit U1 and the second control circuit U2 can directly perform data transmission. Therefore, by using the adjustment circuit 15 to control the communication and charging between the master device 11 and the slave device 12, there is no need to additionally set up a sensor structure, which can save costs, simplify the device structure and save the assembly steps.

[0034] In an embodiment of the present application, the first communication terminal J12 includes a first transmission terminal J13 and a first reception terminal J14, and the second communication terminal J22 includes a second transmission terminal J23 and a second reception terminal J24; the adjustment circuit 15 includes a first switching tube Q1 and a second switching tube Q2. The control end of the first switching tube Q1 is connected to the first voltage, and the first communication end S of the first switching tube Q1 is electrically connected to the second transmission terminal J23; the control end of the second switching tube Q2 is connected to the second voltage and is connected to the second communication end D of the first switching tube Q1. The third communication end S of the second switching tube Q2 is grounded, and the fourth communication end D of the second switching tube Q2 is electrically connected to the second reception terminal J24; when the first port J1 is not plugged into the second port J2, the first transmission terminal J13 and the first reception terminal J14 are in the first voltage state; when the second port J2 is plugged into the first port J1, the first transmission terminal J13 is electrically connected to the second transmission terminal J23, so that the first switching tube Q1 is turned on, thereby causing the second switching tube Q2 to be turned on, and further causing the voltage of the second reception terminal J24 to be pulled to the second voltage state, so that the voltage of the first reception terminal J14 changes; wherein, the first voltage state and the second voltage state are different.

[0035] For example, the first voltage state can be a high level state, and the second voltage state can be a low level state. When the first port J1 is not plugged into the second port J2, at this time, the first sending terminal J13 and the first receiving terminal J14 are in the high level state. When the first port J1 and the second port J2 are plugged together, since the control terminal of the first switching transistor Q1 is pulled down to ground, at this time, the control terminal of the first switching transistor Q1 is in the low level state, the first switching transistor Q1 is turned on, the second communication terminal D of the first switching transistor Q1 has the same level as the first sending terminal J13, that is, the high level. Furthermore, the control terminal of the second switching transistor Q2 is also at the high level, and the second switching transistor Q2 is turned on at the high level. At this time, the second switching transistor Q2 is also in the conducting state. Since the third communication terminal S of the second switching transistor Q2 is grounded, the second switching transistor Q2 can pull down the level of the second receiving terminal J24 to the low level. At this time, the second receiving terminal J24 is in the low level state. Furthermore, the first receiving terminal J14 is in the low level state, and the first control circuit U1 can control the power supply circuit U4 to supply power to the first port J1, and then can power on the second control circuit U2.

[0036] Further, the control terminal of the first switching transistor Q1 is grounded through the first pull-down resistor R1, and the control terminal of the second switching transistor Q2 is grounded through the second pull-down resistor R2. When the first port J1 is not plugged into the second port J2, the first sending terminal J13 and the first receiving terminal J14 are in the pull-up state. When the second port J2 and the first port J1 are plugged together, the first sending terminal J13 is electrically connected to the second sending terminal J23, so that the first switching transistor Q1 is turned on, thereby the second switching transistor Q2 is turned on, and the voltage of the second receiving terminal J24 is pulled down, and the voltage of the first receiving terminal J14 is reduced.

[0037] Specifically, when the first port J1 is not plugged into the second port J2, the first port J1 is in the high level state. When the first port J1 and the second port J2 are plugged together, at this time, since the control terminal of the first switching transistor Q1 is pulled down to ground through the first pull-down resistor R1, at this time, the control terminal of the first switching transistor Q1 is in the low level state under the action of the first pull-down resistor R1. Furthermore, the first switching transistor Q1 is turned on, and the second communication terminal D of the first switching transistor Q1 has the same level as the first receiving terminal J14, which is the high level. At this time, the control terminal of the second switching transistor Q2 is at the high level, and at this time, the second switching transistor Q2 is turned on. Since the third communication terminal S of the second switching transistor Q2 is grounded, therefore, the third communication terminal S of the second switching transistor Q2 can pull down the voltage of the second receiving terminal J24, so that the voltage of the second receiving terminal J24 is the low level. Therefore, the second port J2 is in the low level state. At this time, the first port J1 is also in the low level state, and the first control circuit U1 can control the power supply circuit U4 to charge the first port J1, so as to supply power to the second control circuit U2.

[0038] Of course, in some other embodiments, the first switching transistor Q1 can also be turned on in a high-level state, and the second switching transistor Q2 can be turned on in a low-level state. Other circuit structures of the adjustment circuit 15 can be appropriately adjusted, which will not be elaborated here one by one.

[0039] Further, the control terminals of the first switching transistor Q1 and the second switching transistor Q2 are grounded through a first pull-down resistor R1 and a second pull-down resistor R2 respectively. On the one hand, the first pull-down resistor R1 and the second pull-down resistor R2 can play a certain protective role for the first switching transistor Q1 and the second switching transistor Q2 to avoid damage to the circuit caused by voltage changes and extend the circuit life; on the other hand, it can reduce signal interference in the adjustment circuit 15, thereby improving signal quality.

[0040] In an embodiment of the present application, the second transmission terminal J23, the second reception terminal J24, and the control terminal of the first switching transistor Q1 are electrically connected to the second control circuit U2; after the second control circuit U2 is powered on, it outputs a control signal to turn off the first switching transistor Q1, thereby controlling the second switching transistor Q2 to turn off.

[0041] Specifically, when the second control circuit U2 is powered on, at this time, the second control circuit U2 outputs a high level to the control terminal of the first switching transistor Q1, and the first switching transistor Q1 cannot be turned on. Further, the second switching transistor Q2 cannot be turned on either. At this time, since the second transmission terminal J23 and the second reception terminal J24 are both directly connected to the second control circuit U4, therefore, the first control circuit U1 and the second control circuit U2 are directly connected through the first transmission terminal J13, the second transmission terminal J23, the first reception terminal J14, and the second reception terminal J24 respectively. At this time, the first control circuit U1 and the second control circuit U2 can directly perform data transmission through the first port J1 and the second port J2.

[0042] In an embodiment of the present application, the power supply circuit U4 is provided with an enable terminal EN and a power supply terminal VUBS. The enable terminal EN is connected to the first control circuit U1, and the power supply terminal VUBS is connected to the first port J1. When the voltage of the first port J1 changes, the first control circuit U1 generates an enable signal to the enable terminal EN so that the power supply circuit U4 supplies power to the first port J1 through the power supply terminal VUBS. Specifically, when the first port J1 and the second port J2 are plugged in, at this time, the voltage of the first port J1 changes from a first voltage state to a second voltage state under the action of the adjustment circuit 15. For example, the first voltage state can be a high-level state, and the second voltage state can be a low-level state. At this time, the first control circuit U1 generates an enable signal to the enable terminal EN. When the power supply circuit U4 receives the enable signal, it supplies power to the first port J1 through the power supply terminal VUBS. At this time, the charging function of the master device 11 for the slave device 12 can be realized.

[0043] In an embodiment of the present application, the slave device 12 further includes a battery 13. When the power supply circuit U4 charges the slave device 12, the power supply circuit U4 can charge the battery 13. A charging integrated circuit U3 is also provided in the slave device 12. One end of the charging integrated circuit U3 is electrically connected to the battery 13, and the other end of the charging integrated circuit U3 is electrically connected through the second port J2. Specifically, when the power supply circuit U4 charges the slave device 12, the power supply circuit U4 is electrically connected through the first port J1, the first port J1 is electrically connected to the second port J2, one end of the charging integrated circuit U3 is electrically connected to the battery 13, and the other end of the charging integrated circuit U3 is electrically connected to the second port J2. Therefore, during the process of the power supply circuit U4 charging the battery 13, the current sequentially passes through the first port J1, the second port J2, and the charging integrated circuit U3, and finally flows into the battery 13 from the charging integrated circuit U3. By providing the battery 13 in the present application, it can play a certain role in storing electric energy. When the user uses the master device 11 and the slave device 12, there is no need to use while charging, and the portability is higher. The charging integrated circuit U3 can play a role in protecting the circuit during the charging process of the power supply circuit U4, so as to avoid damage to the circuit caused by voltage mutation and affect the service life of the circuit.

[0044] In an embodiment of the present application, both the first port J1 and the second port J2 include an asynchronous transceiver (UART). Since both the first port J1 and the second port J2 include an asynchronous transceiver, at this time, the master device 11 can directly power on, charge, communicate with the slave device 12 through the asynchronous transceiver, without additionally adding an insertion detection pin for the device, thereby reducing costs and improving the aesthetic appearance of the overall appearance of the slave device 12 and the master device 11.

[0045] It should be noted that terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or vertical, but can be slightly inclined; terms such as "parallel" and "perpendicular" do not mean that the fittings are absolutely parallel or perpendicular to each other, but can form a certain angular deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In addition, the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of the present application are usually placed during use. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0046] It is understood that the meaning of "a plurality of" in this text is at least two, such as two, three, etc., unless there are specific restrictive descriptions. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices. The term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0047] The above is only the implementation mode of this application, and does not limit the patent scope of this application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of this application.

Claims

1. A charging system, characterized in that: The charging system comprises: A master device, comprising a first control circuit, first ports electrically connected to the first control circuit respectively, and a power supply circuit, wherein the power supply circuit is also electrically connected to the first port; A slave device, comprising a second control circuit and a second port electrically connected to the second control circuit; When the second port is plugged into the first port, the voltage of the first port changes, and the first control circuit controls the power supply circuit to supply power to the first port based on the voltage change of the first port, so as to power on the second control circuit through the first port and the second port; The slave device is further provided with an adjustment circuit electrically connected to the second port, and the adjustment circuit adjusts the voltage of the second port when the second port is plugged into the first port, so that the voltage of the first port changes.

2. The charging system according to claim 1, characterized in that: The adjustment circuit is also electrically connected to the second control circuit. After the second control circuit is powered on, it controls the adjustment circuit to shut down the voltage adjustment on the second port, so that the second control circuit transmits data with the first control circuit through the second port and the first port.

3. The charging system according to claim 1, characterized in that: The first port is provided with a first power supply terminal and a first communication terminal, the second port is provided with a second power supply terminal and a second communication terminal, and when the first port is plugged into the second port, the first power supply terminal is electrically connected to the second power supply terminal, and the first communication terminal is electrically connected to the second communication terminal; The first power supply terminal is electrically connected to the power supply circuit, and the first communication terminals are electrically connected to the first control circuit respectively; the second power supply terminal is electrically connected to the second control circuit, and the adjustment circuit is electrically connected to the second communication terminal.

4. The charging system according to claim 3, characterized in that: The first communication terminal includes a first transmitting terminal and a first receiving terminal, the second communication terminal includes a second transmitting terminal and a second receiving terminal, and the adjustment circuit includes: a first switch tube, wherein a control terminal of the first switch tube is connected to a first voltage, and a first communication terminal of the first switch tube is electrically connected to the second sending terminal; a second switch tube, wherein a control terminal of the second switch tube is connected to a second voltage and is electrically connected to a second communication terminal of the first switch tube, a third communication terminal of the second switch tube is grounded, and a fourth communication terminal of the second switch tube is electrically connected to the second receiving terminal; When the first port is not plugged into the second port, the first transmitting terminal and the first receiving terminal are in a first voltage state; When the second port is plugged into the first port, the first transmitting terminal is electrically connected to the second transmitting terminal, so that the first switch tube is turned on, thereby turning on the second switch tube, and further pulling the voltage of the second receiving terminal to a second voltage state, so that the voltage of the first receiving terminal changes; The first voltage state and the second voltage state are different.

5. The charging system according to claim 4, characterized in that: The control end of the first switch tube is grounded through a first pull-down resistor, the control end of the second switch tube is grounded through a second pull-down resistor, and when the first port is not plugged into the second port, the first sending terminal and the first receiving terminal are in a pull-up state; When the second port is plugged into the first port, the first transmitting terminal is electrically connected to the second transmitting terminal, so that the first switch tube is turned on, thereby turning on the second switch tube, and further pulling down the voltage of the second receiving terminal, so that the voltage of the first receiving terminal is reduced.

6. The charging system according to claim 4, characterized in that: The second transmitting terminal, the second receiving terminal and the control end of the first switch tube are also electrically connected to the second control circuit; After being powered on, the second control circuit outputs a control to turn off the first switch tube, thereby controlling the second switch tube to turn off.

7. The charging system according to claim 1, characterized in that: The power supply circuit is provided with an enable terminal and a power supply terminal, the enable terminal is connected to the first control circuit, and the power supply terminal is connected to the first port. When the voltage of the first port changes, the first control circuit generates an enable signal and transmits it to the enable terminal, so that the power supply circuit supplies power to the first port through the power supply terminal.

8. The charging system according to claim 4, characterized in that: The slave device further includes a battery, and when the power supply circuit charges the slave device, the power supply circuit can charge the battery; The slave device is provided with a charging integrated circuit, one end of the charging integrated circuit is electrically connected to the battery, and the other end of the charging integrated circuit is electrically connected to the second port.

9. The charging system according to claim 5, characterized in that: The first voltage state is a high level state, and the second voltage state is a low level state.

10. The charging system according to any one of claims 1 to 9, characterized in that: The first port and the second port each include an asynchronous receiver-transmitter.

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