External networking charging combination device and charging system

Abstract

The utility model discloses an external networking charging combined device, which comprises an SOC chip, a charging protocol chip, a USB male head, a USB female head, a voltage reduction module and a power supply selection module, the SOC chip and the charging protocol chip are in communication connection through I2C; each of the USB male head and the USB female head comprises a power supply port, a communication port, a grounding end and a data port, the power supply port is electrically connected with the power supply selection module, the communication port is electrically connected with the charging protocol chip, the data port of the USB male head is electrically connected with the SOC chip, and the data port of the USB female head is electrically connected with the charging protocol chip; the power supply selection module is electrically connected with the SOC chip through the voltage reduction module and is used for supplying power to the SOC chip; and the SOC chip or the charging protocol chip is electrically connected with the power supply selection module and is used for controlling a power supply for the SOC chip. According to the utility model, the terminal equipment can be charged while external network transmission is carried out by using the external equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of charging, in particular to an external Internet-connected charging combination device and a charging system. Background Art

[0002] A USB dongle is a small portable device that connects to a computer, mobile phone or other mobile terminal device through a USB interface to provide wireless network connection. This device usually contains a built-in SIM card slot, into which the user can insert the SIM card provided by the mobile operator and access the Internet through the mobile data service of the SIM card to solve the problem of Internet access in a non-WIFI environment. Whether traveling, in remote areas without WIFI coverage, or in emergency situations such as arrears of mobile phone bills, USB dongles can provide convenient network connection.

[0003] However, although the USB dongle solves the problem of mobile network access, it also brings some inconveniences in use. For example, it occupies the only USB port on the terminal mobile phone, making it impossible to plug in a charger for charging. At this time, the power of the mobile phone is constantly consumed rapidly, and the user cannot use it for a long time. In addition, the terminal computer may also encounter the same problem. For example, if the computer-specific charger is not brought, the Internet device cannot be used for entertainment or work for a long time. Utility Model Content

[0004] The utility model provides an external Internet access charging combination device and a charging system, which can realize charging of mobile terminal devices such as mobile phones and computers while using external devices for external network transmission.

[0005] The utility model provides an external Internet access charging combined device, including a SOC chip, a charging protocol chip, a USB male head, a USB female head, a step-down module and a power supply selection module;

[0006] The SOC chip and the charging protocol chip are connected via I2C communication;

[0007] The USB male connector and the USB female connector both include a power port, a communication port, a ground terminal and a data port, the power port is electrically connected to the power supply selection module, the communication port is electrically connected to the charging protocol chip, the ground terminal is grounded, the data port of the USB male connector is electrically connected to the SOC chip, and the data port of the USB female connector is electrically connected to the charging protocol chip;

[0008] The power supply selection module is electrically connected to the SOC chip through the step-down module, and is used to supply power to the SOC chip;

[0009] The SOC chip or the charging protocol chip is electrically connected to the power supply selection module, and is used to control the power supply to the SOC chip.

[0010] In one embodiment, the power supply selection module includes a first PMOS power tube and a second PMOS power tube, the source of the first PMOS power tube is connected to the source of the second PMOS power tube, the drain of the first PMOS power tube is electrically connected to the USB male power port, the drain of the second PMOS power tube is electrically connected to the USB female power port, and the gates of the first PMOS power tube and the second PMOS power tube are electrically connected to the SOC chip or the charging protocol chip, respectively.

[0011] In one embodiment, the buck module includes a first buck module and a second buck module, one end of the first buck module is electrically connected to the source of the first PMOS power tube, and the other end of the first buck module is electrically connected to the SOC chip through the second buck module.

[0012] Optionally, the first step-down module is a step-down module that converts a voltage in the range of 5V-20V to a voltage of 5V; and the second step-down module is a 5V to 3.8V step-down module.

[0013] In one embodiment, the external Internet access and charging assembly device further includes a wireless charging module to achieve wireless charging through an external power source connected to a USB female connector.

[0014] Optionally, the wireless charging module includes a controller, a driver, a voltage and current sensor and a coil, the output end of the driver is connected to the coil, the two ends of the controller are respectively electrically connected to the SOC chip and the driver, and the two ends of the voltage and current sensor are respectively electrically connected to the output ends of the controller and the driver.

[0015] In one embodiment, the high-speed clock input port of the SOC chip is electrically connected to a temperature compensated crystal oscillator.

[0016] In one embodiment, the low-speed clock input port of the SOC chip is electrically connected to a crystal oscillator.

[0017] The utility model also provides a charging system, including: an external power supply, a terminal device and the above-mentioned external Internet charging assembly device, one end of the external Internet charging assembly device is electrically connected to the external power supply through a USB female connector, and the other end of the external Internet charging assembly device is electrically connected to the terminal device through a USB male connector.

[0018] The utility model realizes the external network transmission function of the terminal device by connecting the SOC chip through the USB male head; at the same time, the SOC chip and the mobile terminal device are powered by the power supply selection module. When the USB female head is not plugged into the charging power supply, the mobile terminal device's own power supply is used to power the control chip through the USB male head and the power supply selection module; when the USB female head is connected to the charging power supply, the power supply mode of the control chip is automatically switched, and the power supply of the terminal device to the control chip is converted to the external power supply connected to the USB female head to power the control chip. At the same time, the external power supply can charge the terminal device, effectively avoiding the problem in the prior art that mobile terminal devices such as mobile phones and computers cannot be charged while using external devices for external network transmission and the power is quickly exhausted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A structural schematic diagram of a usage mode of the external Internet access charging combination device provided by the utility model;

[0021] Figure 2 A structural schematic diagram of another use mode of the external Internet access charging combination device provided by the utility model;

[0022] Figure 3 A schematic diagram of the circuit structure of the external Internet access charging combination device provided by the utility model;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure of the wireless charging module;

[0024] Figure 5 for Figure 3 Circuit diagram of the power supply selection module. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the prior art, in order to improve the network transmission capability of mobile phone terminals or computer terminals, external devices are usually used to enable mobile phone terminals or computer terminals to communicate with the external network. For example, when a mobile phone is connected to an external device, the mobile phone interface will be occupied. Although external network transmission is achieved, the charging is affected because the mobile phone interface is occupied. For example, when a computer is connected to an external device, although external network transmission is achieved, when a computer-specific charger is not carried, the computer cannot effectively transmit to the external network and charge at the same time. To this end, the utility model provides an external Internet charging combination device that can enable the terminal device to be charged while using an external device for external network transmission.

[0027] In order to make the technical solution of the present utility model clearer, the embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0028] Figure 1 A structural schematic diagram of a use situation of the external Internet access charging combination device provided by the utility model; Figure 2 A structural schematic diagram of another use of the external Internet access charging combination device provided by the utility model; Figure 3 This is a schematic diagram of the circuit structure of the external Internet access and charging combination device provided by the utility model.

[0029] An external Internet charging combination device provided by an embodiment of the utility model includes a SOC chip, a charging protocol chip, a USB male head (Male), a USB female head (Female), a step-down module and a power supply selection module; the SOC chip and the charging protocol chip are connected through I2C (serial communication bus) communication; the USB male head and the USB female head both include a power port, a communication port, a ground terminal and a data port, the power port is electrically connected to the power supply selection module, the communication port is electrically connected to the charging protocol chip, the ground terminal is grounded, the data port of the USB male head is electrically connected to the SOC chip, and the data port of the USB female head is electrically connected to the charging protocol chip; the power supply selection module is electrically connected to the SOC chip through the step-down module, and is used to power the SOC chip; the SOC chip or the charging protocol chip is electrically connected to the power supply selection module, and is used to control the power supply to the SOC chip.

[0030] Combined with Figure 1 , Figure 2 and Figure 3The external Internet charging combination device includes a SOC chip U1, a charging protocol chip U2, a USB male connector J1, a USB female connector J2, a buck module and a power supply selection module; the SOC chip U1 and the charging protocol chip U2 are connected through I2C communication; the USB male connector J1 and the USB female connector J2 both include a power port VBUS, a communication port CC1 / CC2, a ground terminal GND, and a data port D+&D-, the power port VBUS is electrically connected to the power supply selection module, the communication port CC1 / CC2 is electrically connected to the charging protocol chip U2, the ground terminal GND is grounded, the data port D+&D- of the USB male connector J1 is electrically connected to the SOC chip U1, and the data port D+&D- of the USB female connector J2 is electrically connected to the charging protocol chip U2; the power supply selection module is electrically connected to the SOC chip U1 through the buck module, for supplying power to the SOC chip U1; the SOC chip U1 or the charging protocol chip U2 is electrically connected to the power supply selection module, for controlling the power supply to the SOC chip U1.

[0031] Specifically, the USB male connector J1 can be inserted into the interface of a mobile phone or a computer terminal, the USB female connector J2 can be connected to an external power source, such as a power charger, the charging protocol chip U2 is an existing chip, and can identify existing fast charging solution chargers such as PD / QC / BC1.2 / FCP, the USB male connector J1 and the USB female connector J2 can be type-c interfaces, and connecting an external network device through the SOC chip U1 is an existing technology, which will not be repeated here;

[0032] There are two situations when using it. One is: just plug the USB male connector J1 into the terminal, such as Figure 1 As shown in FIG. 1 , when only the USB male connector J1 is inserted into the terminal, the terminal device supplies power to the SOC chip U1 through the power supply selection module; another is: when the USB male connector J1 is inserted into the terminal, the USB female connector J2 is plugged into an external power charger, such as Figure 2 As shown, when the USB male connector J1 is inserted into the terminal, the USB female connector J2 is plugged into the external power charger, and the external power supply supplies power to the terminal through the power supply selection module and the USB male connector J1, and supplies power to the SOC chip U1 through the power supply selection module and the step-down module.

[0033] Figure 5 for Figure 3 The circuit diagram of the power supply selection module in FIG. 1 is shown in FIG. Figure 5As shown, the power supply selection module includes a first PMOS power tube Q1 and a second PMOS power tube Q2, the source S of the first PMOS power tube Q1 is connected to the source S of the second PMOS power tube Q2, the drain D of the first PMOS power tube Q1 is electrically connected to the power port VBUS of the USB male connector J1, the drain D of the second PMOS power tube Q2 is electrically connected to the power port VBUS of the USB female connector J2, and the gates G of the first PMOS power tube Q1 and the second PMOS power tube Q2 are electrically connected to the SOC chip U1 or the charging protocol chip U2, respectively.

[0034] Specifically, the SOC chip U1 and the charging protocol chip U2 can be electrically connected to the power supply selection module to control the power supply to the SOC chip U1. In some examples, such as Figure 1 As shown, the gates G of the first PMOS power tube Q1 and the second PMOS power tube Q2 are electrically connected to the SOC chip U1, and the SOC chip U1 is used to control the first PMOS power tube Q1 and the second PMOS power tube Q2. In other examples, it can also be as shown in the attached Figure 2 Specifically, the gates G of the first PMOS power tube Q1 and the second PMOS power tube Q2 are electrically connected to the charging protocol chip U2, and the charging protocol chip U2 is used to control the first PMOS power tube Q1 and the second PMOS power tube Q2.

[0035] In some specific embodiments, Figure 4 The buck module includes a first buck module U3 and a second buck module U4. One end of the first buck module U3 is electrically connected to the source S of the first PMOS power tube Q1, and the other end of the first buck module U3 is electrically connected to the SOC chip U1 through the second buck module U4.

[0036] In some specific embodiments, the first step-down module U3 is a 5V to 20V to 5V step-down module.

[0037] In some specific embodiments, the second step-down module U4 is a 5V to 3.8V step-down module.

[0038] Specifically, no matter it is terminal power supply or power supply, the voltage is converted into 5V through the first step-down module U3 of the step-down module, and then converted into 3.8V used by the SOC chip U1 through the second step-down module U4.

[0039] Figure 4 for Figure 3 The wireless charging module is a schematic diagram of the structure of the wireless charging module in the embodiment of the utility model. The external Internet charging combination device provided by the utility model also includes a wireless charging module to realize wireless charging through the external power supply of the USB female connector J2. Figure 4As shown, the wireless charging module includes a controller U5, a driver U6, a voltage and current sensor and a coil L, the output end of the driver U6 is connected to the coil L, the two ends of the controller U5 are respectively electrically connected to the SOC chip U1 and the driver U6, and the two ends of the voltage and current sensor are respectively electrically connected to the output ends of the controller U5 and the driver U6.

[0040] Specifically, the 5V converted by the first step-down module U3 is used to power wireless charging. The controller U5, as the core part of the wireless charging module, is responsible for coordinating the entire wireless charging process, including parsing the charging protocol, controlling the charging power, executing the safety protection mechanism and other tasks, and receiving relevant instructions and status information from the SOC chip U1, so as to accurately control the wireless charging process. The driver U6 converts the control signal sent by the controller U5 into the electrical signal required to drive the wireless charging coil L. The output end of the driver U6 is connected to the coil L. As the transmitting end of wireless charging, the coil L will generate an alternating electromagnetic field under the drive of the driver U6. When a device with a wireless charging receiving coil is close (such as wireless charging headphones, etc.), wireless transmission of electrical energy can be realized. The voltage and current sensor monitors the voltage and current status generated by the coil L in real time to ensure the safety and efficiency of the wireless charging process.

[0041] In some specific embodiments, the high-speed clock input port of the SOC chip U1 is electrically connected to a temperature compensated crystal oscillator TCXO to receive a precise and stable clock signal.

[0042] In some specific embodiments, the low-speed clock input port of the SOC chip U1 is electrically connected to the crystal oscillator crystal, which can ensure that the SOC chip has a reliable and stable low-frequency clock reference during operation.

[0043] In some specific embodiments, the SOC chip U1 is connected to a Bluetooth communication module to facilitate Bluetooth communication.

[0044] In some specific embodiments, the SOC chip U1 is connected to a GPS communication module and integrates support for GPS signal processing, or communicates with the GPS module through an external interface to obtain geographic location information, time synchronization and other related data.

[0045] In some specific embodiments, the model of the SOC chip U1 may be XY3100, which is a low-power NB-IoT chip that integrates BLE, GNSS, and Wi-Fi Scan, and optimizes the cost and power consumption performance in device positioning and tracking scenarios. It has a smaller size and can activate more IoT applications.

[0046] In some specific embodiments, the charging protocol chip U2 may be IP2723T, CYPD3171, etc.

[0047] The utility model also provides a charging system in an embodiment, including: an external power supply; a terminal device; and the external Internet charging assembly device in the above embodiment, one end of the external Internet charging assembly device is electrically connected to the external power supply through a USB female connector, and the other end of the external Internet charging assembly device is electrically connected to the terminal device through a USB male connector.

[0048] The specific use process of the external Internet charging combination device and charging system provided by the embodiment of the utility model is as follows:

[0049] Only when the USB male connector J1 is connected to the terminal, and the USB female connector J2 is not connected to the external power charger, the charging protocol chip U2 follows the USB type C protocol and communicates with the SOC chip U1 through I2C. The charging protocol chip U2 informs the mobile phone / computer that the SOC chip U1 & charging protocol chip U2 are USB devices.

[0050] The CC1 / CC2 pins of the USB male connector J1 and the USB female connector J2 are pulled down inside the charging protocol chip U2, so that the mobile phone or computer recognizes that the device is in device mode, and the mobile phone or computer works in USB HOST mode;

[0051] At this time, the mobile phone or computer outputs a 5V power supply. The power supply path starts from the power pin VBUS of the USB male connector J1 of the terminal mobile phone / computer, and reaches point A along the dotted line path E. It passes through the first PMOS power tube Q1 to point B, and the high voltage is converted to 5V (the 5-20V voltage is converted to 5V) through the first buck module U3. Then the second buck module U4 further converts the 5V into the 3.8V working voltage required by the SOC chip U1.

[0052] At the same time, the SOC chip U1, the USB male connector J1 and the mobile phone / computer communicate with each other through the USB 2.0 interface to realize information interaction and data transmission between the Internet access device and the mobile phone / computer. The SOC chip U1 or the charging protocol chip U2 is electrically connected to the gate G, thereby controlling the conduction state of the first PMOS power tube Q1.

[0053] When an external charger is inserted, the gate G of the first PMOS power tube Q1 and the second PMOS power tube Q2 is used to control the first PMOS power tube Q1 to be disconnected and the second PMOS power tube Q2 to be turned on to prevent current reverse flow, so that the voltage connected to point B keeps the SOC chip U1 powered on. The charging protocol chip U2 component in the device communicates with the charger through the CC1 / CC2 line of the USB female connector J2 or the traditional D+ / D- data line to identify the fast charging protocol supported by the charger, such as PD, FCP, QC3.0 / 2.0, Apple's proprietary charging mode, and AFC, etc., or identifies the external inserted charger as CDP / DCP through BC1.2. After identifying the type of charger, the SOC chip U1 or the charging protocol chip U2 controls the first PMOS power tube Q1 to be turned on after the fast charging protocol is identified;

[0054] The SOC chip U1 and the charging protocol chip U2 perform handshake communication with the mobile phone / computer through the USB fast charging protocol and execute Power Role Swap, that is, the two parties exchange power roles, terminate the terminal's own power supply and accept charging, and the mobile phone / computer stops supplying power to the SOC chip U1 and the charging protocol chip U2, and switches to charging mode to accept the voltage from the charger. At this time, the voltage of the charger is transmitted through the USB female connector J2 connection point C, the second PMOS power tube Q2, point B, point A, and straight line D, ensuring that the SOC chip U1 can work normally and the mobile phone / computer can be charged at the same time;

[0055] At the same time, the voltage generated by the charger passes through point B, and then is converted into 5V through the first step-down module U3, and then the 5V is converted into 3.8V through the second step-down module U4 to power the SOC chip U1.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An external Internet access charging combination device, characterized in that: Including SOC chip, charging protocol chip, USB male connector, USB female connector, step-down module and power supply selection module; The SOC chip and the charging protocol chip are connected via I2C communication; The USB male connector and the USB female connector both include a power port, a communication port, a ground terminal and a data port, the power port is electrically connected to the power supply selection module, the communication port is electrically connected to the charging protocol chip, the ground terminal is grounded, the data port of the USB male connector is electrically connected to the SOC chip, and the data port of the USB female connector is electrically connected to the charging protocol chip; The power supply selection module is electrically connected to the SOC chip through the step-down module, and is used to supply power to the SOC chip; The SOC chip or the charging protocol chip is electrically connected to the power supply selection module, and is used to control the power supply to the SOC chip.

2. The external Internet access and charging combination device according to claim 1, characterized in that: The power supply selection module includes a first PMOS power tube and a second PMOS power tube, the source of the first PMOS power tube is connected to the source of the second PMOS power tube, the drain of the first PMOS power tube is electrically connected to the USB male power port, the drain of the second PMOS power tube is electrically connected to the USB female power port, and the gates of the first PMOS power tube and the second PMOS power tube are electrically connected to the SOC chip or the charging protocol chip respectively.

3. The external Internet access and charging combination device according to claim 1, characterized in that: The step-down module includes a first step-down module and a second step-down module. One end of the first step-down module is electrically connected to the source of the first PMOS power tube, and the other end of the first step-down module is electrically connected to the SOC chip through the second step-down module.

4. The external Internet access and charging combined device according to claim 3, characterized in that: The first step-down module is a step-down module that converts a voltage in the range of 5V-20V into a voltage of 5V.

5. The external Internet access and charging combined device according to claim 4, characterized in that: The second step-down module is a 5V to 3.8V step-down module.

6. The external Internet access charging combination device according to any one of claims 1 to 5, characterized in that: It also includes a wireless charging module to achieve wireless charging through an external power source connected to the USB female port.

7. The external Internet access and charging combined device according to claim 6, characterized in that: The wireless charging module includes a controller, a driver, a voltage and current sensor and a coil. The output end of the driver is connected to the coil, the two ends of the controller are respectively electrically connected to the SOC chip and the driver, and the two ends of the voltage and current sensor are respectively electrically connected to the output ends of the controller and the driver.

8. The external Internet access and charging combined device according to claim 1, characterized in that: The high-speed clock input port of the SOC chip is electrically connected to the temperature-compensated crystal oscillator.

9. The external Internet access and charging combination device according to claim 1, characterized in that: The low-speed clock input port of the SOC chip is electrically connected to the crystal oscillator.

10. A charging system, characterized in that: include: External power supply; Terminal equipment; And the external Internet access charging combination device as described in any one of claims 1 to 9, one end of the external Internet access charging combination device is electrically connected to the external power supply through a USB female connector, and the other end of the external Internet access charging combination device is electrically connected to the terminal device through a USB male connector.

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