Charging base, electronic device, charging control method, and charging system

Abstract

The present application relates to the field of smart terminals, and discloses a charging base, an electronic device, a charging control method, and a charging system, which are used to implement boost charging of an electronic device by a charging base via a two-contact charging interface. The charging base comprises: a boost module, a filter circuit, a carrier chip, a power supply interface, and a charging interface. The carrier chip is configured to: demodulate a voltage at a positive electrode of the charging interface, and obtain a characteristic signal of an alternating-current signal modulated by the electronic device onto the positive electrode of the charging interface; and on the basis of the characteristic signal, output a restored alternating-current signal to the filter circuit. The filter circuit is configured to integrate the alternating-current signal to obtain a control voltage, and output the control voltage to an enable terminal of the boost module. The boost module is configured to adjust, on the basis of the control voltage inputted from the enable terminal, a power supply voltage outputted to the positive electrode of the charging interface.

Description

Charging base, electronic device, charging control method and charging system

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on March 29, 2024, with application number 202410389169.4 and invention name “Charging base, electronic device, charging control method and charging system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of smart terminals, and in particular to a charging base, an electronic device, a charging control method, and a charging system. Background Art

[0003] The charging base can perform wired charging for electronic devices such as smart watches through the charging port. The commonly used charging port includes two contacts, positive and negative, which are electrically connected to the positive and negative poles in the charging port of the electronic device respectively, that is, the charging base can perform wired charging for the electronic device.

[0004] However, there are some problems with the existing wired charging method, which leads to low charging efficiency. On the one hand, the impedance of the two contacts of the charging interface is relatively large. On the other hand, the contacts are electrically connected to other circuits inside the charging interface through springs and other means. The springs are thin and cannot withstand large currents, so the current flowing through the two contacts of the charging interface cannot be too high. Therefore, if you want to improve the charging efficiency by increasing the charging power of the charging base, you cannot increase the power supply current output by the charging base through the charging interface, but you need to increase the power supply voltage output by the charging base through the charging interface. However, when the charging base just starts to charge the electronic device, the charging interface of the charging base outputs a higher power supply voltage (i.e., boost charging), which will trigger the overvoltage protection of the electronic device and make it impossible to boost charge the electronic device, resulting in low charging efficiency. Summary of the Invention

[0005] The embodiments of the present application provide a charging base, an electronic device, a charging control method, and a charging system, which are used to enable the charging base to boost the voltage of the electronic device through a charging interface with two contacts, thereby improving charging efficiency.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, a charging base is provided for charging an electronic device, the charging base comprising: a boost module, a filter circuit, a carrier chip, a power interface and a charging interface; wherein the power interface comprises a positive pole and a negative pole; the charging interface comprises a positive pole and a negative pole, the negative pole of the power interface being electrically connected to the negative pole of the charging interface; the positive pole of the power interface being electrically connected to the input end of the boost module and being configured to input a power supply voltage; the output end of the boost module, the input end of the carrier chip and the positive pole of the charging interface being electrically connected; the charging interface being electrically connected to the electronic device; the output end of the carrier chip being electrically connected to the input end of the filter circuit; the output end of the filter circuit being electrically connected to the enable end of the boost module; the carrier chip being configured to demodulate the voltage at the positive pole of the charging interface to obtain a characteristic signal of the AC signal modulated by the electronic device to the positive pole of the charging interface; and outputting a restored AC signal to the filter circuit based on the characteristic signal; the filter circuit being configured to integrate the AC signal to obtain a control voltage and output the control voltage to the enable end of the boost module; and the boost module being configured to adjust the supply voltage output to the positive pole of the charging interface based on the control voltage input to the enable end.

[0008] The charging base provided in the embodiments of the present application, when charging an electronic device through a two-contact charging interface, the electronic device transmits a characteristic signal of an AC signal to the charging base through the positive electrode. The charging base then restores the AC signal based on the characteristic signal, integrates the AC signal to obtain a control voltage, and adjusts the supply voltage output by the charging base based on the control voltage, thereby delaying the boosting of the supply voltage. This prevents the charging base from outputting a high supply voltage at the beginning of charging, triggering the electronic device's overvoltage protection and preventing boost charging. The charging base thus enables boost charging of the electronic device through the two-contact charging interface, thereby improving charging efficiency.

[0009] In one possible implementation, when the control voltage is less than a threshold, the supply voltage is equal to the power supply voltage; when the control voltage is greater than or equal to the threshold, the supply voltage is greater than the power supply voltage.

[0010] The control voltage is the integral of the AC signal. As the number of AC signal cycles increases, the control voltage increases. When the control voltage is less than the threshold, the boost module does not boost the supply voltage, and the supply voltage equals the power supply voltage. When the control voltage is greater than or equal to the threshold, the boost module boosts the supply voltage, and the supply voltage exceeds the power supply voltage.

[0011] In one possible embodiment, the filter circuit includes a first capacitor, a diode, and a second capacitor, the first end of the first capacitor is electrically connected to the input end of the filter circuit, the second end of the first capacitor is electrically connected to the anode of the diode, the cathode of the diode, the first end of the second capacitor, and the output end of the filter circuit are electrically connected, and the second end of the second capacitor is grounded.

[0012] The first capacitor acts as a DC blocking capacitor, isolating the DC signal while allowing the AC signal to pass through. The diode controls the unidirectional flow of current. When the AC signal is positive, the diode conducts, charging the second capacitor. This increases the voltage of the second capacitor, which in turn increases the control voltage output by the output of the filter circuit, integrating the control voltage with the AC signal. The diode turns off when the AC signal is negative, preventing the discharged current from the second capacitor from flowing back into the positive terminal of the power interface.

[0013] In one possible implementation, the filter circuit further includes a first resistor, wherein a first end of the first resistor is electrically connected to a second end of the first capacitor, and the second end of the first resistor is grounded. If the AC signal stops being input to the input end of the filter circuit, the first capacitor discharges through the first resistor and returns to an initial state.

[0014] In one possible implementation, the filter circuit further includes a second resistor, wherein a first end of the second resistor is electrically connected to a first end of the second capacitor, and a second end of the second resistor is electrically connected to a second end of the second capacitor. If the AC signal stops being input to the input end of the filter circuit, the second capacitor discharges through the second resistor and returns to its initial state.

[0015] In one possible implementation, the filter circuit further includes a third capacitor, a first end of the third capacitor being electrically connected to the input end of the filter circuit, and a second end of the third capacitor being grounded. The third capacitor is configured to stabilize the AC signal input to the filter circuit to prevent the AC signal voltage from dropping too quickly.

[0016] In one possible implementation, the filter circuit further includes a third resistor, wherein a first end of the third resistor is electrically connected to the input terminal of the filter circuit, and a second end of the third resistor is grounded. If the AC signal stops being input to the input terminal of the filter circuit, the third capacitor discharges through the third resistor and returns to its initial state.

[0017] In one possible implementation, the filter circuit further includes a fourth resistor, and the cathode of the diode is electrically connected to the first end of the second capacitor via the fourth resistor. The fourth resistor is used to limit the on-state current of the diode to prevent excessive on-state current from damaging the diode.

[0018] In the second aspect, an electronic device is provided, including: a charging chip, a carrier chip, a processor and a charging interface; the charging interface includes a positive pole and a negative pole, the negative pole of the charging interface is grounded, the output end of the processor is electrically connected to the input end of the carrier chip, the output end of the carrier chip, the input end of the charging chip and the positive pole of the charging interface are electrically connected, and the communication end of the charging chip is electrically connected to the communication end of the processor; the processor is used to: receive a normal power supply signal from the charging chip, the normal power supply signal is used to indicate that the positive pole of the charging interface inputs the power supply voltage from the charging base; send an AC signal to the carrier chip, the carrier chip is used to extract the characteristic signal of the AC signal, and modulate the characteristic signal to the positive pole of the charging interface, the characteristic signal is used for the charging base to restore the AC signal, integrate the AC signal to obtain a control voltage, and adjust the supply voltage according to the control voltage.

[0019] In the electronic device provided in the embodiments of the present application, when the charging base charges the electronic device through a two-contact charging interface, the electronic device transmits a characteristic signal of an AC signal to the charging base through the positive electrode thereof. The charging base then restores the AC signal based on the characteristic signal, integrates the AC signal to obtain a control voltage, and adjusts the supply voltage output by the charging base based on the control voltage, thereby delaying the boosting of the supply voltage. This prevents the charging base from outputting a high supply voltage at the beginning of charging, triggering the electronic device's overvoltage protection and preventing boost charging. The charging base thus enables boost charging of the electronic device through the two-contact charging interface, thereby improving charging efficiency.

[0020] In one possible implementation, the processor is further configured to: obtain the supply voltage of the positive electrode of the charging interface through the charging chip; and stop sending the AC signal to the carrier chip in response to the supply voltage not rising within a preset time.

[0021] If the voltage at the positive terminal of the charging port hasn't risen after the preset charging time, there may be an incompatibility issue between the charging base and the electronic device. For example, the charging base may be an older version or from another manufacturer, unable to demodulate the characteristic signal of the AC signal and not supporting the boost charging function. Therefore, the electronic device's processor stops sending the AC signal to the carrier chip, and the carrier chip stops modulating the characteristic signal of the AC signal to the positive terminal of the charging port, thereby reducing the power consumption of the electronic device.

[0022] In one possible implementation, the electronic device further includes a battery, the charging chip is electrically connected to the battery, and the processor is configured to: obtain the battery voltage through the charging chip; and stop sending the AC signal to the carrier chip in response to the battery voltage being greater than a preset value.

[0023] If the battery voltage is greater than the preset value, the electronic device enters the constant voltage charging stage. At this time, the charging current output by the charging chip begins to decrease. Correspondingly, the supply current also begins to decrease. There is no need to reduce the supply current by increasing the supply voltage, so the processor stops sending AC signals to the carrier chip, causing the charging base to stop increasing the supply voltage.

[0024] In a third aspect, a charging control method is provided, which is applied to the electronic device as described in the second aspect, the method comprising: receiving a normal power supply signal from a charging chip, the normal power supply signal being used to indicate that the positive pole of the charging interface inputs a power supply voltage from a charging base; sending an AC signal to a carrier chip, the carrier chip being used to extract a characteristic signal of the AC signal, and modulating the characteristic signal onto the positive pole of the charging interface, the characteristic signal being used by the charging base to restore the AC signal, integrating the AC signal to obtain a control voltage, and adjusting the power supply voltage according to the control voltage.

[0025] In a possible implementation, the method further includes: obtaining the power supply voltage of the positive electrode of the charging interface through the charging chip; and stopping sending the AC signal to the carrier chip in response to the power supply voltage not rising within a preset time.

[0026] In one possible implementation, the method further includes: obtaining the battery voltage through a charging chip; and stopping sending the AC signal to the carrier chip in response to the battery voltage being greater than a preset value.

[0027] In a fourth aspect, a charging system is provided, comprising the charging base as described in the first aspect and any embodiment thereof and the electronic device as described in the second aspect and any embodiment thereof, wherein the charging base is used to charge the electronic device.

[0028] In a fifth aspect, a computer-readable storage medium is provided, comprising instructions, which, when executed on an electronic device, enable the electronic device to execute the method as described in the third aspect and any embodiment thereof.

[0029] In a sixth aspect, a computer program product comprising instructions is provided, which, when the instructions are executed on the electronic device, enables the electronic device to execute the method as described in the third aspect and any embodiment thereof.

[0030] Among them, the technical effects brought about by any implementation method of the third to sixth aspects can refer to the technical effects brought about by the first to second aspects and any implementation methods thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic diagram of a charging system provided in an embodiment of the present application;

[0032] FIG2 is a schematic diagram of another charging system provided in an embodiment of the present application;

[0033] FIG3 is a schematic structural diagram of an electronic device and a charging base provided in an embodiment of the present application;

[0034] FIG4 is a timing diagram of various signals and voltages provided in an embodiment of the present application;

[0035] FIG5 is a schematic structural diagram of a filter circuit provided in an embodiment of the present application;

[0036] FIG6 is a schematic flow chart of a charging control method provided in an embodiment of the present application;

[0037] FIG7 is a schematic diagram of a display interface of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] It should be noted that the terms "first", "second", etc. involved in the embodiments of the present application are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0039] The terms "exemplary" or "for example" in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0040] The terms "coupling" and "connection" involved in the embodiments of this application should be understood in a broad sense. For example, they may refer to a physical direct connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0041] As mentioned above, when the charging base boosts and charges the electronic device through a charging interface with two contacts (positive and negative), if the charging interface of the charging base outputs a higher supply voltage when the electronic device is just being charged, it will trigger the overvoltage protection of the electronic device and will not be able to boost and charge the electronic device, resulting in low charging efficiency. To this end, the charging base, electronic device, charging control method and charging system provided in the embodiments of the present application, when the charging base charges the electronic device through a charging interface with two contacts, the electronic device modulates the characteristic signal of the AC signal onto the positive pole of the charging interface, and the charging base restores the AC signal based on the characteristic signal, integrates the AC signal to obtain a control voltage with a continuously increasing voltage, and adjusts the supply voltage output by the charging base according to the control voltage. When the control voltage is low, the supply voltage output by the charging base is not boosted. When the control voltage exceeds the threshold, the supply voltage output by the charging base is boosted. That is, the boosting of the supply voltage is delayed by integrating the AC signal over time. This avoids the situation where the charging base outputs a higher supply voltage at the beginning of charging, triggering the overvoltage protection of the electronic device and making it impossible to boost charging. The charging base can boost the voltage of the electronic device through the charging interface with two contacts, thereby improving charging efficiency.

[0042] As shown in Figures 1 and 2, an embodiment of the present application provides a charging system, including an electronic device 21, a charging base 22, a power adapter 23, and a transmission line 24. Figure 1 shows a side view of the electronic device 21 placed on the charging base 22, and Figure 2 shows a bottom view of the electronic device 21 (shown in Figure 2A) and a top view of the charging base 22 (shown in Figure 2B).

[0043] The power adapter 23 is used to connect to the mains electricity. The power adapter 23 is electrically connected to the power interface 29 of the charging base 22 via a transmission line 24. Exemplarily, the transmission line 24 can be a universal serial bus (USB) line, the interface for electrically connecting the power adapter 23 and the transmission line 24 can be a USB interface, and the power interface 29 for electrically connecting the charging base 22 and the transmission line 24 can be a USB interface. The charging base 22, the power adapter 23 and the transmission line 24 can be an integrated design or a split design. The electronic device 21 can be a wearable device, such as a smart watch, a smart bracelet, smart glasses, etc. Alternatively, the electronic device can be a terminal device, such as a mobile phone, a heart rate monitor, an oximeter, etc. The embodiment of the present application takes the electronic device 21 as an example of a smart watch, but is not intended to be limited to this. The charging base 22 is a wired charging base for wired charging of the electronic device 21.

[0044] The bottom of the electronic device 21 is provided with a raised structure 25, which includes a first charging port 27. The top of the charging base 22 has a recessed structure 26, which includes a second charging port 28. The first charging port 27 is located opposite the second charging port 28, and the shape of the recessed structure 26 matches the shape of the raised structure 25. For example, the shapes of the recessed structure 26 and the raised structure 25 are both arc-shaped. The charging base 22 is electrically connected to the electronic device 21 via the first charging port 27 and the second charging port 28.

[0045] The first charging interface 27 and the second charging interface 28 can be a pogo pin interface. Traditional pogo pin interfaces can include a two-pin pogo pin interface and a four-pin pogo pin interface. The two-pin pogo pin interface includes two spring pins, and the two spring pins are used to transmit the power supply voltage, wherein one spring pin is grounded (connected) as the negative pole, and the other spring pin is used to output the power supply voltage as the positive pole. The four-pin pogo pin interface includes four spring pins, wherein two spring pins have the same function as the two spring pins in the two-pin pogo pin interface, and are used to transmit the power supply voltage. The other two spring pins of the four spring pins are used for communication between the electronic device 21 and the charging base 22, for example, the electronic device 21 and the charging base 22 negotiate the charging power, the power supply voltage, etc.

[0046] In the embodiment of the present application, the first charging interface 27 and the second charging interface 28 use a two-pin spring pin interface, which is not only used to transmit the power supply voltage, but also can be used for communication between the electronic device 21 and the charging base 22. As shown in Figures 1 and 2, the first charging interface 27 includes a positive pole 271 and a negative pole 272, and the second charging interface 28 includes a positive pole 281 and a negative pole 282. In the embodiment of the present application, the electrical connection between the first charging interface 27 and the second charging interface 28 means that the positive pole 271 of the first charging interface 27 and the positive pole 281 of the second charging interface 28 are electrically connected, and the negative pole 272 of the first charging interface 27 and the negative pole 282 of the second charging interface 28 are electrically connected.

[0047] In addition, the bottom of the electronic device 21 and the top of the charging base 22 each include a magnet (not shown in Figures 1 and 2). The two magnets are arranged opposite each other and have opposite polarities on their opposing sides. When the electronic device 21 is placed on the charging base 22, the magnetic attraction of the two magnets allows the recessed structure 26 in the charging base 22 to fit tightly with the raised structure 25 in the electronic device 21, electrically connecting the first charging port 27 and the second charging port 28. The power adapter 23 then charges the electronic device 21 via the transmission line 24 and the charging base 22.

[0048] As shown in FIG3 , the electronic device 21 includes a processor 211, a first carrier chip 212, a charging chip 213, a battery 214, a memory 215, and a first charging interface 27. The output terminal OUT11 of the processor 211 is electrically connected to the input terminal IN12 of the first carrier chip 212. The output terminal OUT12 of the first carrier chip 212, the input terminal IN13 of the charging chip 213, and the positive electrode 271 of the first charging interface 27 are electrically connected. The output terminal OUT13 of the charging chip 213 is electrically connected to the positive electrode of the battery 214. The communication terminal COM13 of the charging chip 213 is electrically connected to the communication terminal COM11 of the processor 211. The processor 211 is also electrically connected to the memory 215. The negative electrode of the battery 214 is grounded (represented by GND), and the negative electrode 272 of the first charging interface 27 is grounded (represented by GND).

[0049] The electronic device 21 also includes a display screen, a wireless communication module, a mobile communication module, an antenna, etc., which are not shown in the figure. The processor 211 can control the display screen to display images. The display screen can also have a touch function. The display screen detects the user's touch operation on the display screen and feeds back to the processor 211. The wireless communication module and the mobile communication module are respectively coupled to the antenna, and the antenna is used to transmit and receive electromagnetic wave signals. The antenna can be used to cover a single or multiple communication frequency bands, and multiple antennas can also be reused to improve antenna utilization. The mobile communication module can provide the processor 211 with 2G, 3G, 4G, 5G and other wireless communications. The wireless communication module can provide the processor 211 with wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication technology (NFC), infrared technology (IR), and other wireless communications.

[0050] The charging chip 213 is used to input the supply voltage VCC2 from the positive electrode 271 of the first charging interface 27, step down the supply voltage VCC2, and output it to the battery 214, thereby charging the battery 214. The process of the charging chip 213 charging the battery 214 includes a constant current (CC) charging stage and a constant voltage (CV) charging stage. In the constant current charging stage, the charging current output by the charging chip 213 to the battery 214 remains unchanged, and the charging voltage continues to increase. In the constant voltage charging stage, the charging voltage output by the charging chip 213 to the battery 214 remains unchanged, and the charging current continues to decrease. The charging chip 213 is also used to send the voltage of the positive electrode 271 of the first charging interface 27 to the processor 211.

[0051] The memory 215 may include at least one of a volatile memory and a non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), such as a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus RAM (DR RAM). The memory 215 is used to store programs, instructions, and related data. When the programs and instructions are executed by the processor 211, the charging control method provided in the embodiment of the present application can be executed.

[0052] The processor 211 can be a chip, for example, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips. The processor 211 executes the charging control method provided in the embodiment of the present application by executing the programs and instructions stored in the memory 215. The memory 215 and the processor 211 can be integrated into a system on chip (SoC) chip or can be set separately.

[0053] The processor 211 is used to output an AC signal to the first carrier chip 212. The AC signal can be a square wave signal (also called a step signal) or a sine wave signal. The first carrier chip 212 is used to extract the characteristic signal of the AC signal (such as a pulse signal) and modulate the characteristic signal of the AC signal onto the positive pole 271 of the first charging interface 27. Since the positive pole 271 of the first charging interface 27 and the positive pole 281 of the second charging interface 28 are electrically connected, the first carrier chip 212 will also modulate the characteristic signal onto the positive pole 281 of the second charging interface 28. At this time, the power supply voltage VCC2 at the positive pole 271 of the first charging interface 27 and the positive pole 281 of the second charging interface 28 will be superimposed with the characteristic signal. So that the charging base 22 can restore the original AC signal based on the characteristic signal.

[0054] On the electronic device 21 side, extracting the characteristic signal of the square wave signal is simpler to implement than extracting the characteristic signal of the sine wave signal. Moreover, on the charging base 22 side, restoring the square wave signal based on the characteristic signal of the square wave signal is also simpler to implement than restoring the sine wave signal based on the characteristic signal of the sine wave signal. Therefore, the embodiment of the present application takes the AC signal as a square wave signal as an example, but is not intended to be limited to this. For example, as shown in A and B in Figure 4, taking the AC signal as a square wave signal as an example, the first carrier chip 212 can extract the rising edge and falling edge of the square wave signal to obtain a pulse signal, that is, the pulse signal represents the rising edge and falling edge of the square wave signal, and the pulse signal is the characteristic signal of the square wave signal. The rising edge of the square wave signal corresponds to a pulse signal higher than 0V, and the falling edge of the square wave signal corresponds to a pulse signal lower than 0V. As shown in D of FIG. 4 , the first carrier chip 212 superimposes the pulse signal on the power supply voltage VCC2 at the positive electrode 271 of the first charging interface 27 . The rising edge of the square wave signal corresponds to a pulse signal higher than the power supply voltage VCC2 , and the falling edge of the square wave signal corresponds to a pulse signal lower than the power supply voltage VCC2 .

[0055] In the embodiment of the present application, the first carrier chip 212 modulates the characteristic signal of the AC signal onto the positive electrode 271 of the first charging interface 27 rather than directly modulating the AC signal onto the positive electrode 271 of the first charging interface 27. This is because if the AC signal were modulated directly onto the positive electrode 271 of the first charging interface 27, the supply voltage VCC2 at the positive electrode 271 of the first charging interface 27 would become an AC voltage. However, when charging an electronic device, it is desirable for the supply voltage VCC2 to be a DC voltage to achieve stable power supply. However, since the characteristic signal (e.g., a pulse signal) has an extremely short duration, it is equivalent to a spike in the supply voltage VCC2. As a result, the supply voltage VCC2 remains a stable DC voltage for most of the time. Furthermore, the charging chip 213 can filter out the spike (i.e., the pulse signal) in the supply voltage VCC2 through filtering, without affecting the charging of the battery 214.

[0056] Continuing with FIG3 , the charging base 22 includes a second carrier chip 221, a filter circuit 222, a boost module 223, a power interface 29, and a second charging interface 28. The power interface 29 includes a positive electrode 291 and a negative electrode 292, and the second charging interface 28 includes a positive electrode 281 and a negative electrode 282. The negative electrode 292 of the power interface 29 is electrically connected to the negative electrode 282 of the second charging interface 28. The positive electrode 291 of the power interface 29 is electrically connected to the input terminal IN23 of the boost module 223. The positive electrode 291 of the power interface 29 is used to input the power supply voltage VCC1. The output terminal OUT23 of the boost module 223, the input terminal IN21 of the second carrier chip 221, and the positive electrode 281 of the second charging interface 28 are electrically connected. The output terminal OUT23 of the boost module 223 is used to output the supply voltage VCC2. The output terminal OUT21 of the second carrier chip 221 is electrically connected to the input terminal IN22 of the filter circuit 222 , and the output terminal OUT22 of the filter circuit 222 is electrically connected to the enable terminal EN of the boost module 223 .

[0057] The second carrier chip 221 is used to demodulate the voltage at the positive electrode 281 of the second charging interface 28 to obtain a characteristic signal of the AC signal modulated by the electronic device 21 onto the positive electrode 271 of the first charging interface 27 (i.e., the positive electrode 281 of the second charging interface 28); and output a restored AC signal to the filter circuit 222 based on the characteristic signal of the AC signal. For example, the second carrier chip 221 can demodulate the voltage at the positive electrode 281 of the second charging interface 28 to obtain a characteristic signal (pulse signal) of the square wave signal modulated by the electronic device 21 onto the positive electrode 271 of the first charging interface 27 (i.e., the positive electrode 281 of the second charging interface 28). Because the pulse signal indicates the rising and falling edges of the square wave signal, the second carrier chip 221 can output the restored square wave signal to the filter circuit 222 based on the pulse signal. For example, when the pulse signal indicates the rising edge of the square wave signal, the second carrier chip 221 outputs a high level to the filter circuit 222 ; when the pulse signal indicates the falling edge of the square wave signal, the second carrier chip 221 outputs a low level to the filter circuit 222 .

[0058] The filter circuit 222 is used to integrate the AC signal to obtain a control voltage and output the control voltage to the enable terminal EN of the boost module 223. The control voltage will gradually increase with the increase in the number of cycles of the AC signal until it reaches a preset value (e.g., 1.8V) greater than a threshold value (e.g., 1.4V) and then no longer increases. For example, as shown in C in Figure 4, the filter circuit 222 can integrate the AC signal (square wave signal) to obtain a control voltage, and the control voltage will gradually increase with the increase in the number of cycles of the square wave signal until it reaches a preset value greater than the threshold value and then no longer increases. Figure 5 will describe a possible structure of the filter circuit 222.

[0059] The boost module 223 is configured to regulate the supply voltage VCC2 output to the positive electrode 281 of the second charging interface 28 based on a control voltage inputted to the enable terminal EN. Initially, the control voltage is zero, less than a threshold value (e.g., 1.4V), and the boost module 223 does not boost the power supply voltage VCC1; that is, the power supply voltage VCC2 is equal to the power supply voltage VCC1. While the boost module 223 supplies power to the electronic device 21 via the second charging interface 28 at a lower power supply voltage VCC2 for a period of time, the control voltage gradually increases as the number of AC signal cycles increases. When the control voltage is greater than or equal to the threshold value, the boost module 223 boosts the power supply voltage VCC1, such that the power supply voltage VCC2 is greater than the power supply voltage VCC1. For example, when the power supply voltage VCC2 is 9V, the charging base 22 begins boosting and charging the electronic device 21. This prevents the charging base 22 from initially charging the electronic device 21, i.e., from supplying power at a higher power supply voltage VCC2, triggering the overvoltage protection of the electronic device 21 and preventing boost charging of the electronic device 21.

[0060] As shown in Figure 5, the filter circuit 222 includes a first resistor R1, a first capacitor C1, a diode D, a second resistor R2, a second capacitor C2, a third resistor R3, a third capacitor C3, and a fourth resistor R4. Among them, the second resistor R2, the third resistor R3, the third capacitor C3, and the fourth resistor R4 are optional. Exemplarily, the diode D can be a Schottky diode BAT54. The first resistor R1 is 5KΩ, the second resistor R2 is greater than 1000KΩ (for example, 5000KΩ), the third resistor R3 is 5KΩ, and the fourth resistor R4 is 120KΩ. The first capacitor C1 is 4.7uF, the second capacitor C2 is 2.2uF, and the third capacitor C3 is 300pF.

[0061] The first end of the first capacitor C1, the first end of the third capacitor C3, and the first end of the third resistor R3 are electrically connected to the input end IN22 of the filter circuit 222, the second end of the first capacitor C1 and the first end of the first resistor R1 are electrically connected to the anode of the diode D, the cathode of the diode D is electrically connected to the output end OUT22 of the filter circuit 222 through the fourth resistor R4, the first end of the second resistor R2 and the first end of the second capacitor C2 are electrically connected to the output end OUT22 of the filter circuit 222, the second end of the third capacitor C3, the second end of the third resistor R3, the second end of the first resistor R1, the second end of the second resistor R2, and the second end of the second capacitor C2 are grounded (indicated by GND).

[0062] The third capacitor C3 is used to stabilize the AC signal input by the filter circuit 222 to prevent the AC signal voltage from dropping too quickly. The first capacitor C1 acts as a DC blocking capacitor, isolating the DC signal while passing the AC signal. The diode D is used to control the unidirectional flow of current. When the AC signal is a positive voltage, the diode D is turned on, thereby charging the second capacitor C2. The voltage of the second capacitor C2 increases, as shown in Figure 4, i.e., the control voltage output by the output terminal OUT22 of the filter circuit 222 increases, realizing the integration of the control voltage to the AC signal. The diode D is turned off when the AC signal is a negative voltage, preventing the current discharged from the second capacitor C2 from being recharged to the positive electrode 291 of the power interface 29. Because the second resistor R2 has a large resistance, the second capacitor C2 is slowly discharged through the second resistor R2, preventing the second capacitor C2 from discharging quickly, so that the voltage drop of the second capacitor C2 is very small, i.e., the control voltage output by the output terminal OUT22 of the filter circuit 222 drops very little. In the next cycle of the AC signal, the voltage of the second capacitor C2 will continue to increase, and the control voltage output by the output terminal OUT22 of the filter circuit 222 will also continue to increase. The fourth resistor R4 is used to limit the conduction current of the diode D to prevent the conduction current of the diode D from being too large and damaging the diode D.

[0063] The control voltage output by the output terminal OUT22 of the filter circuit 222 will gradually increase as the number of AC signal cycles increases. The voltage difference between the input terminal IN22 and the output terminal OUT22 of the filter circuit 222 becomes smaller and smaller, and the increase in the control voltage in each cycle becomes smaller and smaller. Since the second resistor R2 is slowly discharging, the control voltage decreases. When the control voltage reaches a preset value greater than the threshold, the increase and decrease in the control voltage reach a balance, and the control voltage no longer increases with the increase in the number of AC signal cycles, but stabilizes near the preset value.

[0064] If the input terminal IN22 of the filter circuit 222 stops inputting an AC signal, the third capacitor C3 discharges through the third resistor R3, the first capacitor C1 discharges through the first resistor R1, and the second capacitor C2 discharges through the second resistor R2, returning these capacitors to their initial states. The control voltage drops to zero, and the boost module 223 stops boosting the power supply voltage VCC1, i.e., the supply voltage VCC2 equals the power supply voltage VCC1.

[0065] The charging control method according to an embodiment of the present application is described below with reference to FIG6 . As shown in FIG6 , the method includes steps S101 - S110 .

[0066] S101 , in an initial state, the charging base 22 outputs a power supply voltage VCC1 to the electronic device 21 through the second charging interface 28 . The processor 211 of the electronic device 21 receives a power supply normal signal from the charging chip 213 .

[0067] When a user places the electronic device 21 on the charging base 22, the first charging port 27 of the electronic device 21 is electrically connected to the second charging port 28 of the charging base 22. Initially, the boost module 223 in the charging base 22 does not boost the voltage. Therefore, the supply voltage VCC2 output by the positive electrode 281 of the second charging port 28 of the charging base 22 is equal to the power supply voltage VCC1. Consequently, the charging chip 213 of the electronic device 21 detects that the voltage at the positive electrode 271 of the first charging port 27 is also equal to the power supply voltage VCC1.

[0068] The power supply voltage VCC1 (e.g., 5V) is within the safe voltage range (e.g., 4.5V-5.5V) and does not trigger the overvoltage protection of the electronic device 21. Therefore, the charging chip 213 sends a power good signal to the processor 211 via the communication terminal COM13. The power good signal is used to indicate that the positive electrode 271 of the first charging interface 27 is inputting the power supply voltage VCC2.

[0069] At this time, the input supply voltage VCC2 of the charging chip 213 is equal to the power supply voltage VCC1, and the battery 214 in the electronic device 21 begins to be charged with a constant current. That is, the supply current output by the charging chip 213 to the battery 214 remains unchanged, and the voltage of the battery 214 gradually increases.

[0070] S102 : The processor 211 of the electronic device 21 sends an AC signal to the first carrier chip 212 . The first carrier chip 212 extracts a characteristic signal of the AC signal and modulates the characteristic signal of the AC signal to the positive electrode 271 of the first charging interface 27 .

[0071] The processor 211 transmits an AC signal (e.g., a square wave signal) to the first carrier chip 212 via the output terminal OUT11. The first carrier chip 212 extracts the characteristic signal (e.g., a pulse signal) of the AC signal and modulates the characteristic signal of the AC signal onto the positive electrode 271 of the first charging interface 27. Since the positive electrode 271 of the first charging interface 27 and the positive electrode 281 of the second charging interface 28 are electrically connected, the first carrier chip 212 modulates the characteristic signal of the AC signal onto the positive electrode 281 of the second charging interface 28. At this time, the characteristic signal is superimposed on the supply voltage VCC2 at the positive electrode 271 of the first charging interface 27 and the positive electrode 281 of the second charging interface 28.

[0072] S103: The second carrier chip 221 of the charging base 22 demodulates the voltage at the positive electrode 281 of the second charging interface 28 to obtain a characteristic signal of the AC signal modulated by the electronic device 21 to the positive electrode 271 of the first charging interface 27 (i.e., the positive electrode 281 of the second charging interface 28); restores the AC signal based on the characteristic signal of the AC signal, and outputs the AC signal to the filter circuit 222.

[0073] For details, please refer to the functional description of the second carrier chip 221 of the charging base 22 in FIG. 3 , which will not be repeated here.

[0074] S104 , the filter circuit 222 of the charging base 22 integrates the AC signal to obtain a control voltage, and outputs the control voltage to the enable terminal EN of the boost module 223 .

[0075] The control voltage will gradually increase as the number of cycles of the AC signal increases. For details, please refer to the functional description of the filter circuit 222 of the charging base 22 in Figure 3, which will not be repeated here.

[0076] S105 , the boost module 223 adjusts the supply voltage VCC2 output to the positive electrode 281 of the second charging interface 28 according to the control voltage input to the enable terminal EN.

[0077] In the initial state, the control voltage is zero, less than a threshold value (e.g., 1.4V). The boost module 223 does not boost the power supply voltage VCC1, and the supply voltage VCC2 is equal to the power supply voltage VCC1. The control voltage gradually increases as the number of AC signal cycles increases. When the control voltage is greater than or equal to the threshold value, the boost module 223 boosts the power supply voltage VCC1, i.e., the supply voltage VCC2 is greater than the power supply voltage VCC1. For example, when the supply voltage VCC2 is 9V, the charging base 22 begins to boost and charge the electronic device 21. For a detailed description of the function of the boost module 223 of the charging base 22, please refer to FIG. 3 and will not be repeated here.

[0078] S106: The processor 211 obtains the supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 through the charging chip 213. If the supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 increases within a preset time (e.g., 10 seconds), step S107 is executed. If the supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 does not increase within the preset time, step S110 is executed.

[0079] The processor 211 requests the charging chip 213 to detect the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 through the communication terminal COM11. The charging chip 213 sends the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 to the processor 211 through the communication terminal COM13.

[0080] In one possible implementation, the processor 211 may continuously request the charging chip 213 via the communication terminal COM11 to detect the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27. In response to the request of the processor 211, the charging chip 213 sends the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 to the processor 211 via the communication terminal COM13.

[0081] In another possible implementation, the processor 211 can configure an interrupt to request the charging chip 213, via the communication terminal COM11, to detect the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27. The processor 211 can then sleep or perform other tasks without having to continuously request the charging chip 213, via the communication terminal COM11, to detect the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27, thereby reducing the power consumption of the electronic device. When the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 changes, the charging chip 213 can interrupt and send the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 to the processor 211 via the communication terminal COM13.

[0082] S107: The charging chip 213 of the electronic device 21 boosts and charges the battery 214. The processor 211 of the electronic device 21 obtains the voltage of the battery 214 through the charging chip 213. If the voltage of the battery 214 is greater than a preset value, steps S108 and S109 are executed. Otherwise, the process restarts from step S106.

[0083] During the preset charging start time, the boost module 223 in the charging base 22 boosts the voltage, and the supply voltage VCC2 output by the positive electrode 281 of the second charging port 28 of the charging base 22 is greater than the power supply voltage VCC1. Since the positive electrode 271 of the first charging port 27 of the electronic device 21 is electrically connected to the positive electrode 281 of the second charging port 28 of the charging base 22, the charging chip 213 of the electronic device 21 detects that the voltage of the positive electrode 271 of the first charging port 27 is also greater than the power supply voltage VCC1. At this point, the charging chip 213 of the electronic device 21 inputs the boosted power supply voltage VCC1 and boosts the charging voltage of the battery 214 to increase the charging power and speed.

[0084] For example, as shown in FIG7 , taking the electronic device 21 as a smartwatch, if the charging chip 213 of the electronic device 21 performs boost charging on the battery 214, the processor 211 of the electronic device 21 can control the display 70 to display the current power level 71, the fast charging icon 72, and the current time 73. The fast charging icon 72 is used to indicate that the charging chip 213 is performing boost charging on the battery 214.

[0085] Returning to FIG. 6 , S108 , in response to the voltage of the battery 214 being greater than the preset value, the processor 211 of the electronic device 21 stops sending the AC signal to the first carrier chip 212 , and the first carrier chip 212 stops modulating the characteristic signal of the AC signal onto the positive electrode 271 of the first charging interface 27 .

[0086] If the voltage of the battery 214 is greater than the preset value, the electronic device 21 enters the constant voltage charging stage. At this time, the charging current output by the charging chip 213 begins to decrease. Correspondingly, the supply current also begins to decrease. It is no longer necessary to reduce the supply current by increasing the supply voltage. Therefore, step S108 is executed to stop the charging base 22 from increasing the supply voltage VCC.

[0087] S109: The second carrier chip 221 of the charging base 22 stops outputting the AC signal to the filter circuit 222. The filter circuit 222 outputs a low level to the enable terminal EN of the boost module 223. The boost module 223 outputs a power supply voltage VCC2 equal to the power supply voltage VCC1 to the positive electrode 281 of the second charging interface 28.

[0088] The second carrier chip 221 of the charging base 22 is unable to demodulate the characteristic signal of the AC signal and therefore stops outputting the AC signal to the filter circuit 222. The filter circuit 222 is unable to integrate the AC signal, so the control voltage output to the enable terminal EN of the boost module 223 is low. Because the control voltage is low, less than a threshold (e.g., 1.4V), the boost module 223 does not boost the power supply voltage VCC1. That is, the supply voltage VCC2 output by the boost module 223 to the positive terminal 281 of the second charging port 28 is equal to the power supply voltage VCC1.

[0089] S110: In response to the power supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 not rising within a preset time, the processor 211 of the electronic device 21 stops sending the AC signal to the first carrier chip 212, and the first carrier chip 212 stops modulating the characteristic signal of the AC signal onto the positive electrode 271 of the first charging interface 27.

[0090] If the supply voltage VCC2 of the positive electrode 271 of the first charging interface 27 does not rise after the preset charging time, it indicates that there may be an incompatibility issue between the charging base 22 and the electronic device 21. For example, the charging base 22 is an older version or a charging base from another manufacturer and cannot demodulate the characteristic signal of the AC signal and does not support the boost charging function. Therefore, the processor 211 of the electronic device 21 stops sending the AC signal to the first carrier chip 212, and the first carrier chip 212 stops modulating the characteristic signal of the AC signal to the positive electrode 271 of the first charging interface 27, thereby reducing the power consumption of the electronic device 21.

[0091] The charging base, electronic device, charging control method, and charging system provided in the embodiments of the present application are such that when the charging base charges the electronic device through a two-contact charging interface, the electronic device modulates the characteristic signal of the AC signal onto the positive electrode of the charging interface. The charging base then restores the AC signal based on the characteristic signal, integrates the AC signal to obtain a control voltage, and adjusts the supply voltage output by the charging base based on the control voltage, thereby delaying the boosting of the supply voltage. This prevents the charging base from outputting a high supply voltage at the beginning of charging, triggering the electronic device's overvoltage protection and preventing boost charging. This allows the charging base to boost the supply voltage of the electronic device through the two-contact charging interface, thereby improving charging efficiency.

[0092] An embodiment of the present application also provides a computer-readable storage medium, which includes instructions. When the instructions are executed on the above-mentioned electronic device, the electronic device executes the various functions or steps performed by the electronic device in the above-mentioned method embodiment, such as executing the method shown in Figure 6.

[0093] An embodiment of the present application also provides a computer program product including instructions. When the instructions are executed on the above-mentioned electronic device, the electronic device executes the various functions or steps performed by the electronic device in the above-mentioned method embodiment, such as executing the method shown in Figure 6.

[0094] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0095] Those skilled in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0096] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0098] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located on a single device or distributed across multiple devices. Some or all of the modules may be selected to achieve the purpose of this embodiment based on actual needs.

[0099] In addition, the functional modules in the various embodiments of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0100] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer program instructions on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more media that can be integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0101] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A charging base for charging electronic devices, characterized in that: The charging base includes: a boost module, a filter circuit, a carrier chip, a power interface and a charging interface; wherein, The power interface includes a positive electrode and a negative electrode; the charging interface includes a positive electrode and a negative electrode, and the negative electrode of the power interface is electrically connected to the negative electrode of the charging interface; the positive electrode of the power interface is electrically connected to the input end of the boost module and is configured to input a power supply voltage; the output end of the boost module, the input end of the carrier chip, and the positive electrode of the charging interface are electrically connected; the charging interface is used to be electrically connected to the electronic device; the output end of the carrier chip is electrically connected to the input end of the filter circuit; the output end of the filter circuit is electrically connected to the enable end of the boost module; The carrier chip is used to demodulate the voltage at the positive electrode of the charging interface to obtain a characteristic signal of the AC signal modulated by the electronic device to the positive electrode of the charging interface; and output the restored AC signal to the filter circuit based on the characteristic signal; The filter circuit is used to integrate the AC signal to obtain a control voltage, and output the control voltage to the enable terminal of the boost module; The boost module is used to adjust the supply voltage output to the positive electrode of the charging interface according to the control voltage input to the enable terminal.

2. The charging base according to claim 1, characterized in that: When the control voltage is less than a threshold value, the supply voltage is equal to the power supply voltage; when the control voltage is greater than or equal to the threshold value, the supply voltage is greater than the power supply voltage.

3. The charging base according to claim 1 or 2, characterized in that: The filter circuit includes a first capacitor, a diode, and a second capacitor. The first end of the first capacitor is electrically connected to the input end of the filter circuit, the second end of the first capacitor is electrically connected to the anode of the diode, the cathode of the diode, the first end of the second capacitor, and the output end of the filter circuit are electrically connected, and the second end of the second capacitor is grounded.

4. The charging base according to claim 3, characterized in that: The filter circuit further includes a first resistor, a first end of the first resistor is electrically connected to a second end of the first capacitor, and a second end of the first resistor is grounded.

5. The charging base according to claim 3 or 4, characterized in that: The filtering circuit further includes a second resistor, a first end of the second resistor is electrically connected to a first end of the second capacitor, and a second end of the second resistor is electrically connected to a second end of the second capacitor.

6. The charging base according to any one of claims 3 to 5, characterized in that: The filter circuit further includes a third capacitor, a first end of the third capacitor is electrically connected to the input end of the filter circuit, and a second end of the third capacitor is grounded.

7. The charging base according to claim 6, characterized in that: The filter circuit further includes a third resistor, a first end of the third resistor is electrically connected to the input end of the filter circuit, and a second end of the third resistor is grounded.

8. The charging base according to any one of claims 3 to 7, characterized in that: The filtering circuit further includes a fourth resistor, and the cathode of the diode is electrically connected to the first end of the second capacitor through the fourth resistor.

9. An electronic device, characterized in that: include: A charging chip, a carrier chip, a processor, and a charging interface; the charging interface includes a positive electrode and a negative electrode, the negative electrode of the charging interface is grounded, the output end of the processor is electrically connected to the input end of the carrier chip, the output end of the carrier chip, the input end of the charging chip, and the positive electrode of the charging interface are electrically connected, and the communication end of the charging chip is electrically connected to the communication end of the processor; the processor is used to: receiving a power supply normal signal from the charging chip, wherein the power supply normal signal is used to indicate that the positive electrode of the charging interface inputs the power supply voltage from the charging base; An AC signal is sent to the carrier chip, the carrier chip is used to extract the characteristic signal of the AC signal, and modulate the characteristic signal to the positive pole of the charging interface. The characteristic signal is used by the charging base to restore the AC signal, integrate the AC signal to obtain a control voltage, and adjust the supply voltage according to the control voltage.

10. The electronic device according to claim 9, characterized in that The processor is further configured to: Obtaining the power supply voltage of the positive electrode of the charging interface through the charging chip; In response to the supply voltage not rising within a preset time, the AC signal is stopped from being sent to the carrier chip.

11. The electronic device according to claim 9 or 10, characterized in that: The electronic device further includes a battery, the charging chip is electrically connected to the battery, and the processor is configured to: obtaining the voltage of the battery through the charging chip; In response to the voltage of the battery being greater than a preset value, the AC signal is stopped from being sent to the carrier chip.

12. A charging control method, characterized in that: Applied to the electronic device according to any one of claims 9 to 11, the method comprises: Receive a power supply normal signal from the charging chip, where the power supply normal signal is used to indicate that the positive electrode of the charging interface inputs the power supply voltage from the charging base; An AC signal is sent to a carrier chip, which is used to extract a characteristic signal of the AC signal and modulate the characteristic signal to the positive pole of the charging interface. The characteristic signal is used by the charging base to restore the AC signal, integrate the AC signal to obtain a control voltage, and adjust the supply voltage according to the control voltage.

13. The method according to claim 12, characterized in that Also includes: Obtaining the power supply voltage of the positive electrode of the charging interface through the charging chip; In response to the supply voltage not rising within a preset time, the sending of the AC signal to the carrier chip is stopped.

14. The method according to claim 12 or 13, characterized in that Also includes: Obtaining the battery voltage through the charging chip; In response to the voltage of the battery being greater than a preset value, the AC signal is stopped from being sent to the carrier chip.

15. A charging system, characterized in that: The device comprises a charging base according to any one of claims 1 to 8 and an electronic device according to any one of claims 9 to 11, wherein the charging base is used to charge the electronic device.

16. A computer-readable storage medium, characterized in that The method comprises instructions, which, when executed on an electronic device, cause the electronic device to execute the method according to any one of claims 12 to 14.

17. A computer program product, characterized in that The method comprises instructions, which, when executed on an electronic device, cause the electronic device to execute the method according to any one of claims 12 to 14.

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