Terminal charging system, terminal charging method, and storage medium

Abstract

The present disclosure provides a terminal charging system, a terminal charging method and a storage medium, which belong to the terminal charging field. The terminal charging system includes a terminal having a first signal ground interface for connecting to a signal ground of the terminal, a cable having a second signal ground interface matching the first signal ground interface, and a charger for charging the terminal through the cable, and when charging the terminal, one end of the cable is connected to the power ground of the charger, and the other end of the cable is connected to the signal ground of the terminal through the second signal ground interface and the first signal ground interface.

Description

[Technical Field]

[0001] This disclosure claims priority to Chinese patent application CN202111131865.8, entitled "Terminal Charging System, Terminal Charging Method, and Storage Medium," filed on September 26, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of terminal charging technology, and in particular to a terminal charging system, a terminal charging method, and a storage medium. [Background technology]

[0003] In recent years, as user demands for a better user experience for smartphones and other devices have grown, users are increasingly demanding shorter charging times. To meet these needs, the industry has proposed the Power Delivery (PD) charging protocol, aiming to standardize high-power charging. The ever-increasing demand for high-power charging has increased the current required by chargers from the traditional 1-2A to 3-5A, resulting in an increase in the charging current output by chargers. However, because the device's signal ground and power ground are shared, the increased current causes a large voltage drop in the signal responsible for PD communication, which can lead to poor signal integrity and ultimately lead to technical issues such as charging being cut off.

[0004] Therefore, how to avoid the charging interruption that occurs when a terminal is in the process of high-power charging has become a technical problem that needs to be solved as soon as possible. Summary of the Invention [Problem to be solved by the invention]

[0005] The present disclosure aims to provide a terminal charging system, a terminal charging method and a storage medium, and to solve the technical problem of charging disconnection occurring when a terminal is in the process of high-power charging. [Means for solving the problem]

[0006] In a first aspect, the present disclosure provides a terminal having a first signal ground interface for connecting to a signal ground of the terminal, a cable having a second signal ground interface that matches the first signal ground interface, and a charger for charging the terminal via the cable. and the signal ground of the charger is connected to the power ground of the charger. When charging the device, the first signal ground interface and the second signal ground interface are isolated from the power ground of the terminal; A terminal charging system is provided, in which one end of a cable is connected to the power ground of the charger, and the other end of the cable is connected to the signal ground of the terminal via a docked first signal ground interface and a docked second signal ground interface.

[0007] In a second aspect, the present disclosure further provides a terminal charging method applicable to the terminal charging system as described above, the terminal charging method including the steps of: after the charger starts charging the terminal, detecting a cable type; if the cable is a first type of cable that does not have a first signal earth interface, controlling a first switch to be on via a first control module; and if the cable is a second type of cable that has a first signal earth interface and two second switches located at both ends of the cable, controlling the first switch to be off via the first control module, and also controlling a second switch connected to the charger's power earth to be on via the second control module, and controlling the second switch connected to the terminal's power earth to be off via the second control module.

[0008] In a third aspect, the present disclosure further provides a storage medium for computer-readable storage that stores one or more programs that, when executed by one or more processors, implement the steps of any of the terminal charging methods provided in the specification of the present disclosure. [Brief explanation of the drawings]

[0009] In order to more clearly describe the technical solutions of the present disclosure, the following briefly describes the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without exerting their creative efforts. [Figure 1] FIG. 1 is a conceptual diagram of a connection between a terminal and a charger in a terminal charging state according to the prior art; [Figure 2] 1 is a structural conceptual diagram of a terminal charging system provided by the present disclosure; [Figure 3] This is a conceptual diagram of the USB Type-C (Universal Serial Bus Type-C, a general-purpose serial bus interface external standard) defined interface structure. [Figure 4] FIG. 2 is a structural conceptual diagram of another terminal charging system provided by the present disclosure. [Figure 5] FIG. 2 is a structural conceptual diagram of another terminal charging system provided by the present disclosure. [Figure 6] FIG. 2 is a structural conceptual diagram of another terminal charging system provided by the present disclosure. [Figure 7] FIG. 2 is a structural conceptual diagram of another terminal charging system provided by the present disclosure. [Figure 8] FIG. 1 is a conceptual flow diagram of a terminal charging method provided by the present disclosure. [Figure 9] FIG. 2 is a conceptual diagram showing a substep flow of a terminal charging method provided by the present disclosure. [Figure 10] 1 is a flowchart of a terminal charging process provided by the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following will clearly and completely describe the technical solutions of the present disclosure in combination with the drawings of the present disclosure. Obviously, the described embodiments are only some embodiments of the present disclosure, but not all embodiments. Based on the embodiments in the present disclosure, all other embodiments that a person skilled in the art can obtain without exerting his or her creative efforts all belong to the claims of the present disclosure.

[0011] The flowcharts shown in the drawings are merely examples, and do not necessarily include all contents and operations / steps, nor do they necessarily have to be performed in the order described. For example, some operations / steps may be separated, combined, or partially combined, and the order of actual execution may be changed according to actual circumstances.

[0012] It should be noted that the terms used in the description of this disclosure are merely for the purpose of describing particular embodiments and are not intended to limit the disclosure. As used in the description of this disclosure and the appended claims, the singular forms "a," "one," and "the" are intended to include the plural forms unless the context clearly dictates otherwise.

[0013] Please refer to Figure 1. Figure 1 is a conceptual diagram of the connection between a terminal and a charger in the terminal charging state in the prior art.

[0014] As shown in Figure 1, the power ground GND (ground, wire ground end) on the charger side is connected to the power ground GND on the terminal side via a cable, and the signal ground GND on the charger side is connected to the signal ground GND on the terminal side via a cable, so the signal ground GND and power ground GND on the charger side and the terminal side are shared. During the terminal charging process, the charging current passes from the charger to the terminal via the cable, and the cable inevitably has a certain impedance (and as the cable shield layer ages, the impedance tends to increase). Therefore, if the charging current increases, the voltage difference between the signal ground GND on the charger side and the signal ground GND on the terminal side increases, which means the communication signal voltage drop increases. If the communication signal voltage drop is excessive, it may cause the terminal to disconnect from charging.

[0015] To solve the above problems, the present disclosure provides a terminal charging system, a terminal charging method, and a storage medium, where the terminal charging method is applied to the terminal charging system to avoid the problem of the terminal being disconnected during charging.

[0016] The following detailed description will be given of some embodiments of the present disclosure in conjunction with the accompanying drawings. If not inconsistent, the following embodiments and features in the embodiments may be combined with each other.

[0017] Please refer to Figure 2. Figure 2 is a structural conceptual diagram of the terminal charging system provided by the present disclosure.

[0018] As shown in Figure 2, the terminal charging system includes a terminal, a cable, and a charger, and the terminal and the charger are electrically connected via the cable. The terminal includes, but is not limited to, electronic devices such as mobile phones, tablets, and wearable devices.

[0019] Here, the terminal includes a terminal power supply, a power ground GND, a signal ground GND, and a first signal ground interface, and the first signal ground interface is used to connect to the terminal's signal ground GND. The cable includes a second signal ground interface that matches the terminal's first signal ground interface, i.e., the second signal ground interface is dockable with the first signal ground interface. The charger includes a power supply, a power ground GND, and a signal ground GND, and the charger's power supply is connected to the terminal power supply via the cable, and the charger's power ground GND is connected to the terminal's power ground GND via the cable, so that the charger charges the terminal via the cable. During terminal charging, one end of the cable is connected to the charger's power ground GND, and the other end of the cable is connected to the terminal's signal ground GND via the docked first signal ground interface and second signal ground interface, thereby realizing separation between the terminal's power ground GND and signal ground GND. This prevents excessive voltage drop in the communication signal even when the charging current is large, preventing the terminal from being disconnected from charging.

[0020] Please refer to Figure 3. Figure 3 is a conceptual diagram of the interface structure defined by USB Type-C (Universal Serial Bus Type-C, a general-purpose serial bus interface external standard), where A1 and B1 are a pair of GND (Ground) pins, A2 is a TX1+ (Transport) pin, B2 is a TX2+ pin, A3 is a TX1- pin, B3 is a TX2- pin, A4 and B4 are a pair of Vbus (Bus power) pins, A5 and B5 are a pair of CC (Configuration Channel) pins, CC1 and CC2, A6 and B6 are a pair of D+ (Date) pins, A7 and B7 are a pair of D- pins, and A8 and B8 are a pair of SBU (Side Band) pins. Use (sideband channel) pins, SBU1 and SBU2, A9 and B9 are a pair of Vbus pins, A10 is RX2- (receive) pin, B10 is RX1- pin, A11 is RX2+ pin, B11 is RX1+ pin, A12 and B12 are a pair of GND pins.

[0021] In an exemplary embodiment, when the SBU1 / SBU2 pins in the USB Type-C defined interface are in an idle state, the idle SBU1 / SBU2 pins form a first signal ground interface.

[0022] In another exemplary embodiment, a pair of GND pins at symmetrical positions in the USB Type-C defined interface is modified to form a first signal ground interface. That is, the first signal ground interface is formed by modifying the definition of a pair of GND pins A1 and B1, or the first signal ground interface is formed by modifying the definition of a pair of GND pins A12 and B12. The pair of GND pins at symmetrical positions is adopted to support reverse insertion of the cable.

[0023] In another exemplary embodiment, based on the existing Type-C definition, i.e., the USB Type-C definition interface shown in FIG. 3, one new preset pin is added, and the newly added preset pin is defined as, for example, A13 / B13 to configure the first signal ground interface.

[0024] The second signal ground interface is matched to the first signal ground interface, and the configuration of the second signal ground interface is similar to that of the first signal ground interface, and will not be further described here.

[0025] In an exemplary embodiment, the terminal further includes a first switch, one side of which is connected to a signal ground of the terminal and the other side of which is connected to a power ground of the terminal.

[0026] To ensure compatibility with standard Type-C cables, the terminal's signal ground GND must be consistent with the power ground GND. Therefore, a first switch is added to the terminal, and the first switch is always off by default. For example, as shown in FIG. 4, the terminal further includes a switch 1, one side of which is connected to the terminal's signal ground GND and the other side of which is connected to the terminal's power ground GND.

[0027] If the device is charging using a standard Type-C cable, i.e., a cable without a second signal / ground interface, switch 1 is turned on. At this time, the signal / ground GND and power / ground GND of the device are shared to ensure that PD communication works normally.

[0028] When charging a device using an improved cable (non-standard Type-C cable), i.e., a cable including a second signal ground interface, switch 1 is turned off. At this time, the signal ground GND and power ground GND of the device are separated, eliminating excessive voltage drop of the communication signal in PD communication and avoiding the problem of the device being disconnected from charging.

[0029] In an exemplary embodiment, the terminal further includes a first control module, where the first control module is connected to the first switch, and the first control module is used to control the on / off of the first switch.

[0030] For example, as shown in FIG. 5 , the terminal further includes a control module 1 connected to a switch 1, and when a normal standard Type-C cable is used to charge the terminal, the control module 1 controls the switch 1 to be on. When an improved cable is used to charge the terminal, the control module 1 controls the switch 1 to be off.

[0031] In an exemplary embodiment, the cable further includes two second switches provided at both ends of the cable, one of which is connected to the power ground of the charger and the other of which is connected to the power ground of the terminal. When the terminal is being charged, the second switch connected to the power ground of the charger is turned on and the second switch connected to the power ground of the terminal is turned off.

[0032] By adding a second switch to each end of the cable, even if both ends of the cable are not fail-safe, it is possible to ensure that the end of the cable connected to the charger side is connected to the power ground GND and the end of the cable connected to the terminal side is connected to the signal ground GND by turning on / off the second switches at both ends of the cable. For example, as shown in Figure 6, the cable further includes Switch 2 and Switch 3, where one end of Switch 2 and Switch 3 are both connected to the second signal ground interface, the other end of Switch 2 is connected to the power ground GND of the charger, and the other end of Switch 3 is connected to the power ground GND of the terminal.

[0033] When charging the device, when switch 2 is turned on and switch 3 is turned off, the device's signal ground GND and power ground GND are separated, preventing excessive voltage drop in the PD communication signal and avoiding the problem of the device being disconnected from charging.

[0034] In an exemplary embodiment, the cable further includes a second control module, where the second control module is connected to two second switches. The second control module is used to turn on one of the two second switches and turn off the other of the two second switches. When charging the terminal, the second control module is used to turn on the second switch connected to the power ground GND of the charger and to control the second switch connected to the power ground GND of the terminal to be turned off.

[0035] For example, as shown in Fig. 7, the cable further includes a control module 2 connected to a switch 2 and a switch 3, and in an exemplary embodiment, the control module 2 is connected to and interacts with the control module 1. When charging the terminal, the control module 1 controls the switch 1 to be turned off, and the control module 2 controls the switch 2 to be turned on and the switch 3 to be turned off.

[0036] At this time, the terminal's signal ground GND and power ground GND are separated, so even if the charging current is large, the voltage drop of the PD communication signal will not be excessive, avoiding the problem of the terminal's charging being cut off.

[0037] The present disclosure further provides a terminal charging method, see Fig. 8. Fig. 8 is a conceptual flow diagram of the terminal charging method provided by the present disclosure.

[0038] As shown in FIG. 8, the terminal charging method includes steps S101 to S103.

[0039] Step S101: After the charger starts charging the terminal, the charger detects the cable type. Here, the cable includes, but is not limited to, a first type cable and a second type cable. The first type cable does not have a first signal / ground interface, and the second type cable has a first signal / ground interface and two second switches located at both ends of the cable. For example, the first type cable is a normal standard Type-C cable, and the second type cable is an improved non-standard Type-C cable.

[0040] In an exemplary embodiment, after inserting the charger, the ID chip on the cable handshakes with the processor to detect whether the cable is a first type of cable or a second type of cable through the ID chip, for example, whether the cable is a normal standard Type-C cable or an improved non-standard Type-C cable.

[0041] In step S102, if the cable is a first type of cable that does not have a first signal ground interface, the first control module is controlled to turn on the first switch. For example, if the cable is a normal standard Type-C cable, charging current is limited and the terminal's control module 1 is controlled to turn on the switch 1. At this time, the terminal's signal ground GND and power ground GND are shared, ensuring that PD communication works normally and achieving compatibility with normal standard Type-C cables.

[0042] Step S103: if the cable is a second type of cable having a first signal ground interface and two second switches located at both ends of the cable, control the first switch to be turned off through the first control module, and control the second switch connected to the power ground of the charger to be turned on through the second control module, and control the second switch connected to the power ground of the terminal to be turned off.

[0043] For example, when the cable is an improved non-standard Type-C cable, switch 1 is controlled to be off via control module 1 in the terminal, and switch 2 connected to the power ground GND of the charger is controlled to be on via control module 2 in the improved non-standard Type-C cable, and switch 3 connected to the power ground GND of the terminal is controlled to be off. At this time, the signal ground GND and power ground GND of the terminal are separated, preventing excessive voltage drop of the communication signal in PD communication and avoiding the problem of the terminal being disconnected from charging.

[0044] In an exemplary embodiment, as shown in FIG. 9, step S103 may include sub-steps S1031 to S1034.

[0045] Substep S1031: Activate low-power charging, and identify the second switch connected to the charger's power ground and the second switch connected to the terminal's power ground among the two second switches based on the current direction.

[0046] For example, when the cable is an improved non-standard Type-C cable, low-power charging is initiated and switch 1 is turned on via control module 1 in the terminal, and switch 2 and switch 3 are both turned on via control module 2 in the improved non-standard Type-C cable, so that the low-power charging function is not affected. The voltage drop of the communication signal during low-power charging is small, and charging disconnection does not occur.

[0047] During low-power charging, a voltage drop occurs between the charger's power ground GND and the terminal's power ground GND at the detection points on both ends of the cable; that is, the voltages corresponding to Switch 2 and Switch 3 are different. Based on the current direction, it is possible to determine whether Switch 2 or Switch 3 is connected to the charger's power ground GND, and whether Switch 3 or Switch 2 is connected to the terminal's power ground GND. Here, the low voltage point is on the side closer to the charger, and the high voltage point is on the side closer to the terminal; that is, if the voltage of Switch 2 is low and the voltage of Switch 3 is high, then Switch 2 is connected to the charger's power ground GND and Switch 3 is connected to the terminal's power ground GND. Conversely, if the voltage of Switch 2 is high and the voltage of Switch 3 is low, then Switch 3 is connected to the charger's power ground GND and Switch 2 is connected to the terminal's power ground GND.

[0048] Substep S1032: Controlling a second switch connected to the power ground of the charger via a second control module to be on, and controlling a second switch connected to the power ground of the terminal to be off.

[0049] For example, if it is determined that switch 2 is connected to the power earth GND of the charger and switch 3 is connected to the power earth GND of the terminal, switch 2 connected to the power earth GND of the charger is controlled to be turned on via control module 2 of the cable, and switch 3 connected to the power earth GND of the terminal is controlled to be turned off.

[0050] Substep S1033: detect whether the power ground path has reached a steady state.

[0051] In an exemplary embodiment, the voltage drop between the charger's power ground GND and the terminal's power ground GND at the detection points on both ends of the cable, i.e., the voltage drop at two locations, switch 2 and switch 3, is detected. If the voltage drops detected multiple times are consistent, i.e., the voltage drops are stable, it is determined that the power ground path corresponding to the charger and the terminal has reached a steady state.

[0052] Substep S1034: when the power ground path reaches a steady state, control the first switch to be turned off via the first control module.

[0053] After the charger determines that the power ground path corresponding to the terminal has reached a steady state, it controls the switch 1 to be turned off via the control module 1 in the terminal to separate the signal ground GND and the power ground GND of the terminal.

[0054] In an exemplary embodiment, the method may include controlling the first switch to be turned off via the first control module when the power ground path reaches a steady state, and then activating high-power charging.

[0055] That is, high-power charging is initiated after the terminal's signal ground GND and power ground GND are separated, so that even if the charging current is large, charging will not be interrupted due to a large voltage drop in the communication signal.

[0056] Referring to Figure 10, Figure 10 is a flowchart of the device charging process. The specific flow of device charging according to the device charging system shown in Figure 7 is as follows: A1): Insert the charger and detect the cable type. A2): For a non-improved cable (a normal standard Type-C cable), limit the charging current and turn on switch 1, which is consistent with the device charging method of the prior art. A3): For an improved cable (a non-standard Type-C cable), turn on switches 1, 2, and 3 to avoid affecting the low-power charging function. A4): Start low-power charging, and based on the current direction, turn on switch 2, which is connected to the charger's power ground GND, and turn off switch 3, which is connected to the device's power ground GND. A5): After the power ground GND path reaches a steady state, turn off switch 1 to separate the signal ground GND and the power ground GND. A6): Start high-power charging.

[0057] In the terminal charging method provided in the above embodiment, after the charger starts charging the terminal, it detects the cable type. If the cable is a first type of cable (the first type of cable does not have a first signal ground interface), it controls the first switch to be on via the first control module to limit the charging current. If the cable is a second type of cable (the second type of cable has a first signal ground interface and two second switches located at both ends of the cable), it controls the first switch to be off via the first control module, and controls the second switch connected to the charger's power ground to be on via the second control module, and controls the second switch connected to the terminal's power ground to be off. At this time, the terminal's signal ground and power ground are separated, so that even if the charging current is large, the signal voltage will not drop too much, and the terminal's charging will not be cut off.

[0058] The present disclosure further provides a storage medium for computer-readable storage that stores one or more programs that, when executed by one or more processors, implement the steps of any of the terminal charging methods provided in the specification of the present disclosure.

[0059] Here, the storage medium may be an internal storage means of the terminal charging system of the above-described embodiment, such as a hard disk or memory of the terminal charging system, or an external storage device of the terminal charging system, such as a socket-type hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, or a flash memory card, which is installed in the terminal charging system.

[0060] Those skilled in the art will understand that all or some of the steps of the methods, systems, and functional modules / units of the devices disclosed above can be implemented as software, firmware, hardware, or any suitable combination thereof. In hardware embodiments, the division between the functional modules / units described above does not necessarily correspond to the division of physical components. For example, one physical component may have multiple functions, or one function or step may be performed by multiple physical components working together. Some or all of the physical components may be implemented as software executed by a processor, such as a central processor, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as a dedicated integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium used to store desired information and which can be accessed by a computer. Additionally, it is well known to those skilled in the art that communication media typically include computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism and can include any information delivery media.

[0061] The present disclosure provides a terminal charging system, a terminal charging method, and a storage medium, the terminal charging system including a terminal, a cable, and a charger, wherein the terminal includes a first signal ground interface, the first signal ground interface is used to connect to the signal ground of the terminal, and the cable has a second signal ground interface that matches the first signal ground interface, when the charger charges the terminal, one end of the cable is connected to the power ground of the charger, and the other end of the cable is connected to the signal ground of the terminal via the docked first signal ground interface and second signal ground interface, thereby realizing separation of the signal ground and power ground of the terminal, so that even if the charging current is large, the signal voltage does not drop too much and the problem of the terminal being disconnected from charging is avoided. The technical solution of the present disclosure realizes that the terminal does not experience charging disconnection during high-power charging.

[0062] It should be understood that the term "and / or" as used in the specification of this disclosure and in the appended claims means and includes any and all possible combinations of one or more of the associated listed items. As used herein, the terms "comprises," "comprises," or any other variation thereof is intended to include a non-exclusive inclusion, such that a process, method, article, or system that includes a set of elements includes not only those elements but also other elements not expressly listed, or further elements inherent in such process, method, article, or system. Absent more limitations, an element defined by the phrase "comprises one of" does not exclude the presence of other identical elements in a process, method, article, or system that includes that element.

[0063] The numbers of the above embodiments of the present disclosure are for illustrative purposes only and do not represent the merits or demerits of the embodiments. The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Various equivalent modifications or replacements that can be easily conceived by any person skilled in the art within the technical scope of the present disclosure should all be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure is subject to the scope of protection of the claims.

Claims

1. a terminal having a first signal ground interface having a first end for connection to a signal ground of the terminal; a cable having a second signal-ground interface that matches the first signal-ground interface; a charger that charges the terminal via the cable, When the terminal is being charged, a first end of the second signal ground interface is connected to a power ground of the charger at the charger side of the cable, and a second end of the second signal ground interface is connected to a second end of the first signal ground interface, so that the power ground of the charger is connected to a signal ground of the terminal via the second signal ground interface and the first signal ground interface. Device charging system.

2. The first signal ground interface is configured by SBU1 / SBU2 pins of the USB Type-C defined interface, or the first signal ground interface is configured by a pair of GND pins located at symmetrical positions on the USB Type-C defined interface, or the first signal ground interface is configured by a newly added preset pin on the USB Type-C defined interface. The terminal charging system of claim 1 .

3. The terminal further includes a first switch having one side connected to a signal ground of the terminal and another side connected to a power ground of the terminal. The terminal charging system of claim 1 .

4. The terminal further includes a first control module connected to the first switch for controlling the on / off of the first switch. The terminal charging system of claim 3 .

5. The cable further includes two second switches provided at both ends of the cable, one of which is connected to the power ground of the charger and the other of which is connected to the power ground of the terminal. The terminal charging system of claim 4 .

6. The cable further includes a second control module connected to the two second switches, for controlling the second switch connected to the power ground of the charger to be on and the second switch connected to the power ground of the terminal to be off when the terminal is being charged. The terminal charging system of claim 5 .

7. A terminal charging method applied to the terminal charging system according to claim 6, comprising: detecting a cable type after the charger starts charging the terminal; If the cable is a first type cable that does not have a first signal ground interface, controlling a first switch to be on via a first control module; If the cable is a second type cable having a first signal ground interface and two second switches located at both ends of the cable, controlling the first switch to be off through a first control module, and controlling the second switch connected to the power ground of the charger to be on through a second control module, and controlling the second switch connected to the power ground of the terminal to be off. How to charge your device.

8. The step of controlling the first switch to be off through the first control module, controlling the second switch connected to the power ground of the charger to be on through the second control module, and controlling the second switch connected to the power ground of the terminal to be off through the second control module includes: activating low-power charging and identifying one of the two second switches based on a current direction, the second switch connected to the power ground of the charger and the second switch connected to the power ground of the terminal; Controlling a second switch connected to the power ground of the charger to be on via the second control module, and controlling a second switch connected to the power ground of the terminal to be off; detecting whether the power ground path has reached a steady state; and controlling the first switch to be off via the first control module when the power ground path reaches a steady state. The terminal charging method according to claim 7.

9. After the step of controlling the first switch to be off via the first control module, activating high-power charging The terminal charging method according to claim 8.

10. A computer-readable storage device is used to store one or more programs that, when executed by one or more processors, implement the steps of the terminal charging method according to any one of claims 7 to 9. storage medium.

Images