WO2021093536A1

WO2021093536A1 - Charging method and terminal, conversion apparatus, and storage medium

Info

Publication number: WO2021093536A1
Application number: PCT/CN2020/122728
Authority: WO
Inventors: 杨冬笋
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-11-11
Filing date: 2020-10-22
Publication date: 2021-05-20
Also published as: CN110676913B; CN110676913A

Abstract

Embodiments of the present application provide a charging method and a terminal, a conversion apparatus and a storage medium. The terminal is connected to a target device by means of the conversion apparatus, and the terminal comprises: a charging and discharging switching circuit; a charging circuit connected to a first port of the charging and discharging switching circuit; a first booster circuit connected to a second port of the charging and discharging switching circuit; wherein the first booster circuit is used to boost, when it is connected to a target device by means of the conversion apparatus, to a preset standard voltage; the charging and discharging switching circuit is used to acquire a first port voltage of the first port and the preset standard voltage, and compare the first port voltage with the preset standard voltage; if the first port voltage is less than the preset standard voltage, charging the target device by means of the first booster circuit; and if the first port voltage is equal to or greater than the preset standard voltage, charging the terminal by means of the charging circuit.

Description

Charging method, terminal, conversion device and storage medium

Cross-references to related applications

This application is filed based on a Chinese patent application with application number 201911093444.3 and an application date of November 11, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by way of introduction.

Technical field

This application relates to the field of charging, and in particular to a charging method, terminal, conversion device, and storage medium.

Background technique

At present, when a mobile phone is used as a host device, it needs to supply power to the slave device connected to it. Since the existing mobile phone does not have an additional charging port to connect the slave device and the adapter at the same time, a 3-port TypeC USB adapter board is used, one of which is The port is connected to the Host device, one port is connected to the Slave device, and one port is connected to the adapter. The adapter board is equipped with a 3-port Power Delivery Protocol (PD) protocol chip. The 3-port PD protocol chip is used to detect whether the adapter is inserted. And when it is detected that the adapter is plugged in, the adapter is controlled to charge the terminal and the slave device at the same time; when it is detected that the adapter is not plugged in, the terminal is controlled to charge the slave device.

However, the 3-port TypeC USB adapter board requires the mobile phone and the slave device to support the USB PD protocol at the same time, and the fast role swap (FRS, Fast Role Swap) of the PD still has a response time of ms. The response time after unplugging the adapter, A large capacitor is required to maintain the power supply of the Slave device, resulting in low charging intelligence.

Summary of the invention

The embodiments of the present application provide a charging method, a terminal, a conversion device, and a storage medium, which can improve charging intelligence.

The technical solution of this application is realized as follows:

In the first aspect, an embodiment of the present application provides a terminal, the terminal is connected to a target device through a conversion apparatus, and the terminal includes:

Charge and discharge switching circuit;

A charging circuit connected to the first port of the charging and discharging switching circuit;

A first boost circuit connected to the second port of the charge and discharge switching circuit;

Wherein, the first boosting circuit is configured to boost the voltage to a preset standard voltage when it is connected to the target device through the conversion device;

The charge-discharge switching circuit is configured to obtain the first port voltage of the first port and the preset standard voltage, and compare the first port voltage with the preset standard voltage; When a port voltage is less than the preset standard voltage, the target device is charged by the first boost circuit; when the first port voltage is greater than or equal to the preset standard voltage, the charging circuit is used Charge the terminal.

In the above terminal, the charge-discharge switching circuit includes a converter and a comparator; the converter is connected to the first port and the second port, and the comparator is connected to the first port and the second port. Two-port connection;

The comparator is configured to obtain the first port voltage and the preset standard voltage, and compare the first port voltage with the preset standard voltage;

The converter is configured to turn on the converter when the voltage at the first port is less than the preset standard voltage; turn off the converter when the voltage at the first port is greater than or equal to the preset standard voltage述 Converter.

In the above terminal, the first end of the charging circuit is connected to the first port; the first end of the first boosting circuit is connected to the second port.

In the above terminal, the terminal further includes: a battery; the first end of the battery is grounded, the second end of the battery is connected to the second end of the charging circuit, and the second end of the battery is also connected to the second end of the charging circuit. The second end of the first boost circuit is connected;

The battery is used to provide power to the target device through the first boost circuit and the converter when the first port voltage is less than the preset standard voltage; when the first port When the voltage is greater than or equal to the preset standard voltage, electric energy is obtained through the charging circuit, and the electric energy is stored.

In the above terminal, the terminal further includes: an overvoltage protection circuit and an external connection interface connected to the first end of the overvoltage protection circuit, and the second end of the overvoltage protection circuit is connected to the first end of the charging circuit. One end is connected, and the second end of the overvoltage protection circuit is connected to the first port;

The overvoltage protection circuit is used to perform overvoltage protection on the voltage inside the terminal;

The external connection interface is used to connect with the first interface of the conversion device.

In a second aspect, an embodiment of the present application provides a conversion device, the conversion device comprising: a first signal transmission line and a second signal transmission line connected in parallel to the first signal transmission line;

Wherein, the first interface of the first signal transmission line is connected to the terminal;

The second interface of the first signal transmission line is connected to the target device;

The third interface of the second signal transmission line is connected to a charging device;

In the above device, the second signal transmission line includes: a second booster circuit;

The second boost circuit is configured to boost the first port voltage of the terminal to a target voltage when the charging device is connected to the third interface, and the target voltage is greater than the preset voltage in the terminal. Set standard voltage.

In the above device, the ground line and the power line of the second signal transmission line are connected in parallel to the target connection point of the first signal transmission line.

In a third aspect, an embodiment of the present application provides a charging method, which is applied to a terminal. The terminal includes: a charging and discharging switching circuit, a charging circuit connected to the first port of the charging and discharging switching circuit, and an external connection interface, and For the first booster circuit connected to the second port of the charge and discharge switching circuit, the terminal is connected to the conversion device through the external connection interface to connect to the target device through the conversion device, and the method includes:

When connected to the target device through the conversion device, boost the voltage to a preset standard voltage through the first boost circuit;

Obtaining the first port voltage of the first port through the charge and discharge switching circuit;

When the first port voltage is less than the preset standard voltage, charge the target device through the first boost circuit;

When the first terminal voltage is greater than or equal to the preset standard voltage, the terminal is charged through the charging circuit.

In a fourth aspect, an embodiment of the present application provides a charging method applied to a conversion device. The conversion device includes a first interface connected to a terminal, a second interface to a target device, and a third interface to the charging device. The second signal transmission line corresponding to the third interface includes a second boost circuit, and the method includes:

When the charging device is connected to the third interface, the second boost circuit is used to boost the voltage of the first port to the target voltage, receive electric energy from the third interface, and pass the electric energy through the The first interface is transmitted to the terminal and the second interface is transmitted to the target device, the target voltage is greater than a preset standard voltage controlled by the first boost circuit of the terminal;

When the charging device is not connected to the third interface, the electric energy sent by the terminal is obtained from the first interface, and the electric energy is transmitted to the target device through the second interface.

In a fifth aspect, an embodiment of the present application provides a storage medium with a computer program stored thereon and applied to a terminal. The computer program is executed by a processor to implement the charging method as described above.

The embodiments of the present application provide a charging method, a terminal, a conversion device, and a storage medium. The terminal is connected to a target device through the conversion device. The terminal includes: a charge-discharge switching circuit; and a charging device connected to the first port of the charge-discharge switching circuit. Circuit; a first boost circuit connected to the second port of the charge and discharge switching circuit; wherein, the first boost circuit is used to boost the voltage to a preset standard voltage when connected to the target device through the conversion device; charge and discharge switching The circuit is used to obtain the first port voltage of the first port and the preset standard voltage, and compare the first port voltage with the preset standard voltage; when the first port voltage is less than the preset standard voltage, pass the first boost The circuit charges the target device; when the first terminal voltage is greater than or equal to the preset standard voltage, the terminal is charged through the charging circuit. With the above implementation scheme, the terminal is equipped with a charge-discharge switching circuit, which determines whether the charging device is plugged in by detecting the voltage of the first port and the voltage of the second port, so that the terminal can charge the target device, or the charging device is the terminal and the target device During the charging process, the switching of the above two charging states is realized through the hardware circuit, which improves the response speed of the terminal and further improves the intelligence of charging.

Description of the drawings

Figure 1 is a schematic diagram of the internal circuit of a 3-port TypeC USB adapter board provided in the prior art;

FIG. 2 is a schematic structural diagram of a terminal 1 provided by an embodiment of the application;

FIG. 3 is a schematic structural diagram of an exemplary terminal provided by an embodiment of the application;

FIG. 4 is a schematic diagram of an exemplary current trend of a terminal charging a target device according to an embodiment of the application;

FIG. 5 is a schematic diagram of a current trend of an exemplary charging device for charging a terminal according to an embodiment of the application; FIG.

FIG. 6 is a schematic structural diagram of a conversion device 2 provided by an embodiment of the application;

FIG. 7 is a schematic diagram of an exemplary 3-port USB cable provided by an embodiment of the application;

FIG. 8 is a circuit composition diagram between a terminal, a conversion device, and a target device according to an embodiment of the application;

FIG. 9 is a first flowchart of a charging method provided by an embodiment of this application;

FIG. 10 is a second flowchart of a charging method provided by an embodiment of this application.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present application. It is not used to limit this application.

At present, the internal structure diagram of the 3-port TypeC USB adapter board is shown in Figure 1. The adapter board includes a 3-port PD protocol chip, where the TypeC1 port is connected to the Host device, the TypeC2 port is connected to the Slave device, and the TypeC3 port is connected to the adapter. And the VBUS power of each port is connected together through a switch. Specifically, the VBUS power of the TypeC1 port is connected through SWITCH1 and the VBUS power of the TypeC2 port through SWITCH2 and the VBUS power of the TypeC3 port through SWITCH3.

When the Host device is connected to the Slave device and the adapter is not inserted, the PD protocol chip does not detect the adapter, the PD protocol chip controls Switch1 and Switch2 to be turned on, Switch3 is turned off, and the Host supplies power to the Slave.

When the adapter is inserted, the PD protocol chip detects the adapter, the PD protocol chip turns on Switch3, turns off Switch1, and the adapter supplies power to the Slave device. Then, through the PD command, the Host device is notified to switch from the power supply mode to the charging mode, and Switch1 is turned on. The adapter supplies power to the Host device and the Slave device at the same time.

When the adapter is unplugged, the PD protocol chip detects that the adapter is unplugged, and uses the PD Fast Role Swap (FRS, Fast Role Swap) command to notify the host device to quickly switch from the charging mode to the power supply mode, and maintain the host device to supply power to the slave device.

However, the 3-port TypeC USB adapter board has the following problems:

1. Both the Host device and the Slave device must have TypeC interfaces, and must support the USB PD full-function protocol, resulting in high production costs and large application scenarios;

2. A 3-port PD control chip and 3 high-current switch tubes need to be added, resulting in high production costs and complex designs.

3. The PD's FRS command still has a ms-level response time. After the charger is unplugged, a large capacitor is required to maintain the power supply of the USB device during this time, otherwise it will cause the device to lose power and fail to connect; in the 3-port TypeC USB The PD chip is set in the adapter board, which will cause the volume of the 3-port TypeC USB adapter board to be large.

In order to solve the above-mentioned problems, a charging method of the present application is proposed, which is described in detail through the following embodiments.

Example one

An embodiment of the present application provides a terminal 1. The terminal 1 is connected to a target device 3 through a conversion device 2. As shown in FIG. 2, the terminal 1 may include:

Charge and discharge switching circuit 10;

The charging circuit 11 connected to the first port of the charging and discharging switching circuit 10;

The first boost circuit 12 connected to the second port of the charge and discharge switching circuit 10;

Wherein, the first boost circuit 12 is used to boost the voltage to a preset standard voltage when it is connected to the target device 3 through the conversion device 2;

The charge-discharge switching circuit 10 is configured to obtain the first port voltage of the first port and the preset standard voltage, and compare the first port voltage with the preset standard voltage; when the When the first port voltage is less than the preset standard voltage, the target device 3 is charged by the first boost circuit 12; when the first port voltage is greater than or equal to the preset standard voltage, the target device 3 is charged by the The charging circuit 11 charges the terminal.

The terminal provided by the embodiment of the present application is suitable for a scenario where the terminal is used as a host device to charge a slave device.

In the embodiments of this application, the above-mentioned terminal may be any device with communication and storage functions, such as: tablet computer, mobile phone, e-reader, remote control, personal computer (PC), notebook computer, in-vehicle equipment, network TV , Wearable devices and other devices are specifically selected based on actual conditions, and the embodiments of this application do not make specific limitations.

In the embodiment of the present application, the target device may be a U disk, a Displayport docking station, and split AR glasses, which are specifically selected according to actual conditions, and the embodiment of the present application does not make specific limitations.

In this embodiment of the application, the conversion device may be a three-port USB cable, where the first port is used to connect to the terminal, the second port is used to connect to the target device, and the third port is used to connect to the charging device. When the first interface is connected to the terminal and the second interface is connected to the target device, the terminal uses the first boost circuit to boost the voltage to the preset standard voltage.

In the embodiment of the present application, the preset standard voltage may be a USB standard voltage, that is, 4.85V-5.25V.

In the embodiment of the present application, the charge-discharge switching circuit of the terminal separately obtains the voltage of the first port and the voltage of the second port of the first port of the charge-discharge switching circuit, wherein the second port is connected to the first boost circuit, so the second The voltage of the port is the preset standard voltage. The charge-discharge switching circuit compares the voltage of the first port with the preset standard voltage. When the charge-discharge switching circuit determines that the voltage of the first port is less than the preset standard voltage, it represents the conversion device at this time. The third interface is not connected to the charging device. At this time, the terminal charges the target device through the first boost circuit; when the charging and discharging switching circuit determines that the voltage of the first port is greater than or equal to the preset standard voltage, it indicates the transition The third interface of the device is connected to the charging device. At this time, the charging device charges the terminal and the target device at the same time. For the terminal, the terminal obtains electric energy through the charging circuit and stores the electric energy.

Optionally, the charge-discharge switching circuit 10 includes a converter 100 and a comparator 101; the converter 100 is connected to the first port and the second port, and the comparator 101 is connected to the first port Connected to the second port;

The comparator 101 is configured to obtain the first port voltage and the preset standard voltage, and compare the first port voltage with the preset standard voltage;

The converter 100 is configured to turn on the converter when the first port voltage is less than the preset standard voltage; turn off when the first port voltage is greater than or equal to the preset standard voltage The converter.

In the embodiment of the application, the charge-discharge switching circuit is composed of a converter and a comparator. The converter and the comparator are connected in parallel, and the converter is connected to the first port and the second port, and the comparator is connected to the first port and the second port. connection.

In the embodiment of the present application, when the comparator determines that the voltage of the first port is less than the preset standard voltage, the terminal turns on the converter and closes the charging circuit, so that the target device is charged through the converter and the first boost circuit; when When the comparator determines that the voltage of the first terminal is greater than or equal to the preset standard voltage, the terminal turns off the converter and turns on the charging circuit to charge the terminal through the charging circuit.

It is understandable that since the response speed of the comparator and the switching speed of the converter are both us-level, when the charging device is unplugged from the conversion device, the terminal can detect and turn on the converter in time to charge the target device, and the terminal can A small capacitor can maintain the VBUS voltage during the period from unplugging the charging device to turning on the converter.

Optionally, the first end of the charging circuit 11 is connected to the first port; the first end of the first boost circuit 12 is connected to the second port.

Optionally, the terminal 1 further includes: a battery 13; a first end of the battery 13 is grounded, a second end of the battery 13 is connected to a second end of the charging circuit 11, and a second end of the battery 13 The two ends are also connected to the second end of the first boost circuit 12;

The battery 13 is used to provide power to the target device 3 through the first boost circuit 12 and the converter 100 when the first port voltage is less than the preset standard voltage; When the voltage of the first port is greater than or equal to the preset standard voltage, electric energy is obtained through the charging circuit 11, and the electric energy is stored.

In the embodiment of the present application, since the second terminal of the battery is respectively connected to the second terminal of the charging circuit and the second terminal of the first boost circuit, the terminal can charge the battery through the charging circuit and transfer the battery through the first boost circuit. The target device provides power.

Exemplarily, as shown in FIG. 3, it is a schematic diagram of the internal structure of the terminal, where the first terminal of the battery is grounded, and the second terminal of the battery is respectively connected to the second terminal of the charging circuit and the second terminal of the first booster circuit. , The first end of the charging circuit is connected to the first end of the comparator and the first end of the converter, the first end of the first boost circuit is connected to the second end of the comparator and the second end of the converter, the comparator The first end of the converter, the first end of the converter, and the first end of the charging circuit are connected to the first end of the overvoltage protection circuit, and the overvoltage protection circuit is connected to the external connection interface of the terminal.

In the embodiment of the present application, when the comparator determines that the voltage of the first port is less than the preset standard voltage, the terminal turns on the converter, and provides power to the target device through the first boost circuit and the converter, as shown in FIG. 4, The current path sequentially passes through the battery, the first boost circuit, the converter, the conversion device and the overvoltage protection circuit to the external connection interface.

In the embodiment of the present application, when the comparator determines that the voltage of the first port is greater than or equal to the preset standard voltage, the terminal turns off the converter and charges the battery through the charging circuit. As shown in FIG. 5, the current path sequentially passes through the external connection. Interface, overvoltage protection circuit, charging equipment, conversion device, charging circuit to battery.

Optionally, the terminal 1 further includes: an overvoltage protection circuit 14 and an external connection interface 15 connected to the first end of the overvoltage protection circuit 14. The second end of the overvoltage protection circuit 14 is connected to the The first end of the charging circuit 11 is connected, and the second end of the overvoltage protection circuit 14 is connected to the first port;

The overvoltage protection circuit 14 is used to perform overvoltage protection on the voltage inside the terminal;

The external connection interface 15 is used to connect with the first interface of the conversion device 2.

In the embodiment of the present application, the terminal is connected to the conversion device through an external connection interface. In practical applications, the first interface of the conversion device is inserted into the external connection interface of the terminal to realize the connection between the terminal and the conversion device.

In the embodiment of the present application, an overvoltage protection circuit is also provided between the first port and the external connection interface, as shown in FIG. 3. The overvoltage protection circuit is provided with a voltage extreme value. When the voltage inside the terminal exceeds the voltage extreme value, the overvoltage protection circuit is triggered to perform the overvoltage protection operation of the terminal, and the voltage extreme value can be set to at least 5.6V.

It is understandable that the terminal is equipped with a charge-discharge switching circuit, which determines whether the charging device is plugged in by detecting the voltage of the first port and the voltage of the second port, so that the terminal can charge the target device, or the charging device is the terminal and the target device. During the charging process, the switching of the above two charging states is realized through the hardware circuit, which improves the response speed of the terminal and further improves the intelligence of charging.

Example two

An embodiment of the present application provides a conversion device 2. As shown in FIG. 6, the conversion device 2 includes: a first signal transmission line 20 and a second signal transmission line 21 connected in parallel to the first signal transmission line 20;

Wherein, the first interface of the first signal transmission line 20 is connected to the terminal 1;

The second interface of the first signal transmission line 20 is connected to the target device 3;

The third interface of the second signal transmission line 21 is connected to the charging device 4;

Optionally, the second signal transmission line 21 includes: a second boost circuit 210;

The second boost circuit 210 is used to boost the voltage of the first port of the terminal 1 to a target voltage when the charging device 4 is connected to the third interface, and the target voltage is greater than that of the terminal 1 preset standard voltage.

Optionally, the ground line and the power line of the second signal transmission line 21 are connected in parallel to the target connection point of the first signal transmission line 20.

The conversion device 2 provided in the embodiment of the present application is suitable for a scenario where a mobile phone is used as a host device to charge a slave device.

In the embodiment of the present application, the first signal transmission line includes all signal lines required for signal transmission, including VBUS, DP/DN, SSTR/RX, GND, etc.; the second signal line includes VBUS line and GND line.

In the embodiment of the present application, the second signal line can be connected in parallel at 1/2 of the first signal transmission line, and the location of the specific target connection point is selected according to actual conditions, and the embodiment of the present application does not make specific limitations.

In the embodiment of the present application, the port types of the first port, the second port, and the third port may be TypeC or MicroB, etc., which are specifically selected according to actual conditions, and the embodiment of the present application does not make specific limitations.

In the embodiment of this application, the conversion device may be a three-port USB cable. As shown in Figure 7, there is a complete USB cable between the USB1 interface and the USB2 interface. For the USB3 interface, the VBUS line and the GND line are connected in parallel. Connect to 1/2 of the USB cable. Among them, the USB1 interface is used to connect to the terminal, the USB2 interface is used to connect to the Slave device, and the USB3 interface is used to connect to the adapter.

In the embodiment of the present application, a second boost circuit is provided on the second signal transmission line of the conversion device, and when the third interface of the conversion device is connected to the charging device, the second boost circuit performs a boost operation. The voltage at the first port of the terminal is boosted to the target voltage due to the boost operation, and the target voltage is slightly higher than the preset standard voltage corresponding to the second port of the terminal, so the terminal determines that the voltage at the first port is greater than the preset standard Voltage. The third interface of the characterization conversion device is connected to the charging device, and the terminal can control the converter to turn off and store the electric energy generated by the charging device in the battery. At this time, the charging device simultaneously charges the terminal and the target device.

Exemplarily, as shown in FIG. 8, it is a schematic diagram of a circuit in which the conversion device connects the terminal and the target device. At the mobile phone side, one end of the battery is grounded, and the other end of the battery is respectively connected to one end of the charging circuit and one end of the first booster circuit. , The other end of the charging circuit is connected to one end of the overvoltage protection circuit, the other end of the first boost circuit is connected to one end of the converter and one end of the comparator, and one end of the overvoltage protection circuit is also connected to the other end of the converter. Connect to the other end of the comparator, and the other end of the overvoltage protection circuit to the external connection interface. On the USB side, the USB1 interface is connected to the external connection interface of the terminal, the USB2 interface is connected to the Slave device, and the USB3 interface is connected to the charging device. A second booster circuit is provided on the internal connection line of the interface.

It is understandable that the conversion device provided in the embodiment of the present application does not need to integrate a PD chip, and further, the terminal and the target device do not need to support the USB PD protocol, thereby reducing the production cost of the conversion device, the terminal and the target device.

Example three

The embodiment of the present application provides a charging method, as shown in FIG. 9, applied to a terminal, the terminal includes: a charging and discharging switching circuit, a charging circuit connected to the first port of the charging and discharging switching circuit, and an external connection interface, and charging and discharging switching For the first booster circuit connected to the second port of the circuit, the terminal is connected to the conversion device through the external connection interface to connect to the target device through the conversion device. The method may include:

S101: When connected to the target device through the conversion device, boost the voltage to a preset standard voltage through the first boost circuit.

The charging method provided by the embodiment of the present application is applicable to a scenario in which a terminal is used as a host device to charge a slave device.

In the embodiments of this application, the above-mentioned terminal may be any device with communication and storage functions, such as: tablet computer, mobile phone, e-reader, remote control, personal computer (PC), notebook computer, in-vehicle equipment, network TV , Wearable devices and other devices are specifically selected according to actual conditions, and the embodiments of this application do not make specific limitations.

In the embodiment of the present application, when the first interface of the conversion device is connected to the terminal and the second interface is connected to the target device, the terminal uses the first boost circuit to boost the voltage to the preset standard voltage.

S102. Obtain the first port voltage of the first port through the charge-discharge switching circuit.

After the terminal is boosted to the preset standard voltage through the first boost circuit, the terminal obtains the first port voltage of the first port through the charge-discharge switching circuit.

In the embodiment of the present application, the charge-discharge switching circuit includes a comparator and a converter connected in parallel, and the terminal obtains the first port voltage of the first port through the comparator.

S103: When the voltage of the first port is less than the preset standard voltage, charge the target device through the first boost circuit.

After the terminal obtains the first port voltage, the terminal compares the first port voltage with the preset standard voltage, and when it determines that the first port is less than the preset standard voltage, charges the target device through the first boost circuit.

In the embodiment of the present application, the terminal compares the first port voltage with the preset standard voltage through a comparator, and when the terminal determines that the first port voltage is less than the preset standard voltage, it indicates that the third interface of the conversion device is not connected to the charging device at this time , The terminal needs to charge the target device. At this time, the terminal turns on the converter, and transmits the power of the terminal battery to the target device through the first boost circuit and the converter.

S104: When the voltage of the first port is greater than or equal to the preset standard voltage, charge the terminal through the charging circuit.

After the terminal obtains the first port voltage, the terminal compares the first port voltage with the preset standard voltage, and when it is determined that the first port voltage is greater than or equal to the preset standard voltage, the terminal is charged through the charging circuit.

In the embodiment of the present application, the terminal compares the voltage of the first port with the preset standard voltage through a comparator. When the voltage of the first port is greater than or equal to the preset standard voltage, it indicates that the third interface of the conversion device is connected to the charging device at this time. When the charging device charges the terminal and the target device at the same time, the terminal turns off the converter and turns on the charging circuit to charge the terminal through the charging circuit.

It should be noted that S103 and S104 are two parallel steps after S102, which are specifically selected according to actual conditions, and the embodiment of the present application does not make specific limitations.

Example four

An embodiment of the application provides a charging method, as shown in FIG. 10, applied to a conversion device, the conversion device includes a first interface connected to a terminal, a second interface with a target device, and a third interface with a charging device. The second signal transmission line corresponding to the interface includes a second boost circuit, and the method includes:

S201. When the charging device is connected to the third interface, use the second boost circuit to boost the voltage of the first port to the target voltage, receive electric energy from the third interface, and transmit the electric energy to the terminal and through the first interface respectively. The second interface is transmitted to the target device, and the target voltage is greater than the preset standard voltage controlled by the first boost circuit of the terminal.

In the embodiment of the application, the conversion device determines in real time whether the third interface is connected to the charging equipment. When the conversion device determines that the third interface is connected to the charging equipment, the conversion device turns on the second boost circuit and uses the second boost circuit, The first port voltage of the terminal is boosted to the target voltage, and the target voltage is greater than the preset standard voltage. At this time, the terminal determines that the first port voltage is greater than the preset standard voltage, the terminal turns off the converter, and the conversion device receives from the third interface The electric energy generated by the charging device is transmitted to the terminal and the target device through the first interface and the second interface, respectively, so as to charge the terminal and the target device at the same time.

S202: When the charging device is not connected to the third interface, obtain the electric energy sent by the terminal from the first interface, and transmit the electric energy to the target device through the second interface.

In the embodiment of the present application, when the conversion device determines that the third interface is not connected to the charging device, the conversion device does not conduct the second boost circuit. At this time, the first port voltage of the terminal fails to be boosted to the target voltage, and the terminal determines When the voltage of the first port is lower than the preset standard voltage, the terminal turns on the converter and sends out electric energy to the first interface of the conversion device. At this time, the conversion device transmits the electric energy obtained by the first interface to the target device through the second interface.

It should be noted that S201 and S202 are two parallel steps, which are specifically selected according to actual conditions, and the embodiment of the present application does not make specific limitations.

Example five

The embodiment of the present application provides a storage medium on which a computer program is stored, and the above-mentioned computer-readable storage medium stores one or more programs, and the above-mentioned one or more programs can be executed by one or more processors and applied to a terminal , The computer program implements the charging method as described in the first embodiment and the third embodiment.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of the present disclosure essentially or the part that contributes to the related technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ) Includes several instructions to make an image display device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present disclosure.

The above are only preferred embodiments of the present application, and are not used to limit the protection scope of the present application.

Industrial applicability

Claims

A terminal, the terminal is connected to a target device through a conversion device, and the terminal includes:

Charge and discharge switching circuit;

A charging circuit connected to the first port of the charging and discharging switching circuit;

A first boost circuit connected to the second port of the charge and discharge switching circuit;

Wherein, the first boosting circuit is configured to boost the voltage to a preset standard voltage when it is connected to the target device through the conversion device;

The charge-discharge switching circuit is configured to obtain the first port voltage of the first port and the preset standard voltage, and compare the first port voltage with the preset standard voltage; When a port voltage is less than the preset standard voltage, the target device is charged by the first boost circuit; when the first port voltage is greater than or equal to the preset standard voltage, the charging circuit is used Charge the terminal.
The terminal according to claim 1, wherein the charge-discharge switching circuit includes a converter and a comparator; the converter is connected to the first port and the second port, and the comparator is connected to the first port. A port is connected to the second port;

The comparator is configured to obtain the first port voltage and the preset standard voltage, and compare the first port voltage with the preset standard voltage;

The converter is configured to turn on the converter when the voltage at the first port is less than the preset standard voltage; turn off the converter when the voltage at the first port is greater than or equal to the preset standard voltage述 Converter.
The terminal according to claim 1, wherein the first end of the charging circuit is connected to the first port; the first end of the first boosting circuit is connected to the second port.
The terminal according to claim 1, wherein the terminal further comprises: a battery; a first end of the battery is grounded, a second end of the battery is connected to a second end of the charging circuit, and The second end is also connected to the second end of the first booster circuit;

The battery is used to provide power to the target device through the first boost circuit and the converter when the first port voltage is less than the preset standard voltage; when the first port When the voltage is greater than or equal to the preset standard voltage, electric energy is obtained through the charging circuit, and the electric energy is stored.
The terminal according to claim 1, wherein the terminal further comprises: an overvoltage protection circuit and an external connection interface connected to the first end of the overvoltage protection circuit, and the second end of the overvoltage protection circuit is connected to the The first end of the charging circuit is connected, and the second end of the overvoltage protection circuit is connected to the first port;

The overvoltage protection circuit is used to perform overvoltage protection on the voltage inside the terminal;

The external connection interface is used to connect with the first interface of the conversion device.
A conversion device, the conversion device comprising: a first signal transmission line and a second signal transmission line connected in parallel to the first signal transmission line;

Wherein, the first interface of the first signal transmission line is connected to the terminal;

The second interface of the first signal transmission line is connected to the target device;

The third interface of the second signal transmission line is connected to the charging device.
7. The device according to claim 6, wherein the second signal transmission line comprises: a second booster circuit;

The second boost circuit is configured to boost the first port voltage of the terminal to a target voltage when the charging device is connected to the third interface, and the target voltage is greater than the preset voltage in the terminal. Set standard voltage.
7. The device according to claim 6, wherein the ground line and the power line of the second signal transmission line are connected in parallel to the target connection point of the first signal transmission line.
A charging method applied to a terminal, the terminal comprising: a charging and discharging switching circuit, a charging circuit and an external connection interface connected to a first port of the charging and discharging switching circuit, and a second port connected to the charging and discharging switching circuit Connected to the first booster circuit, the terminal is connected to the conversion device through the external connection interface to connect to the target device through the conversion device, and the method includes:

When connected to the target device through the conversion device, boost the voltage to a preset standard voltage through the first boost circuit;

Obtaining the first port voltage of the first port through the charge and discharge switching circuit;

When the first port voltage is less than the preset standard voltage, charge the target device through the first boost circuit;

When the first terminal voltage is greater than or equal to the preset standard voltage, the terminal is charged through the charging circuit.
A charging method applied to a conversion device, the conversion device comprising a first interface connected with a terminal, a second interface with a target device, and a third interface with a charging device, and a second signal transmission line corresponding to the third interface The above includes a second boost circuit, and the method includes:

When the charging device is connected to the third interface, the second boost circuit is used to boost the voltage of the first port to the target voltage, receive electric energy from the third interface, and pass the electric energy through the The first interface is transmitted to the terminal and the second interface is transmitted to the target device, the target voltage is greater than a preset standard voltage controlled by the first boost circuit of the terminal;

When the charging device is not connected to the third interface, the electric energy sent by the terminal is obtained from the first interface, and the electric energy is transmitted to the target device through the second interface.
A storage medium having a computer program stored thereon and applied to a terminal, and when the computer program is executed by a processor, the method according to claim 9 is implemented.