Charging device, system and charging method

Abstract

The embodiment of the present application provides a charging device, including a voltage conversion module, a first control module, a first detection module, and a first interface; the first control module controls the voltage conversion module to convert the AC voltage output by the external power supply into a first voltage; the first detection module is used to detect whether the electrical device is electrically connected to the first interface, and detect whether the electrical connection between the charging device and the electrical device is stable within a preset time; the first control module is also used to control the voltage conversion module to output the second voltage to the first interface according to the control signal. The embodiment of the present application also provides a charging system and a charging method. In this way, the charging device, system and method provided in the embodiment of the present application can adjust the output voltage of the charging device so that the electrical device can be quickly charged.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a charging device, system and charging method. Background Art

[0002] With the rapid development of electronic technology, charging devices with fast charging function are widely used.

[0003] Existing charging solutions such as Figure 1 As shown, the charging device 101 includes a voltage conversion module 1011 and a first interface 1013, and the power-consuming device 102 includes a second control module 22, a second interface 1023, and a second detection module 24. The voltage conversion module 1011 is electrically connected to the pin VBUS of the first interface 1013, and is used to receive an external AC voltage and convert it into a DC voltage, and output it to the pin VBUS of the second interface 1023 of the power-consuming device 102 through the pin VBUS of the first interface 1013. The second control module 22 is electrically connected to the second detection module 24. When the pin VBUS of the second interface 1023 cannot detect a voltage, the second control module 22 controls the second detection module 24 to establish communication based on the fast charging protocol with the charging device 101 through the pins CC1 and CC2 of the second interface 1023 (for example, requesting to increase the output voltage). However, when the charging device 101 is connected to the power device 102 , the second control module 22 receives the first voltage, so the second detection module 24 does not request the charging device 101 to output a higher voltage through the pin CC1 or pin CC2 of the first interface 1013 , resulting in the power device 102 being unable to be quickly charged by the charging device 101 . Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a charging device, a system and a charging method, which can adjust the output voltage of the charging device so that the electrical device can be quickly charged.

[0005] In a first aspect, an embodiment of the present application provides a charging device for charging an electrical device, the charging device comprising a voltage conversion module, a first control module, a first detection module, and a first interface;

[0006] The voltage conversion module is electrically connected to the first control module, the external power supply, and the first interface. The first control module controls the voltage conversion module to convert the AC voltage output by the external power supply into a first voltage, and outputs the first voltage to the first interface.

[0007] The first detection module is electrically connected to the first interface and is used to detect whether the electrical device is electrically connected to the first interface. When the first detection module detects that the electrical device is electrically connected to the first interface, the first detection module establishes communication with the electrical device and receives a control signal output by the electrical device. The control signal is used to control the voltage conversion module to output a second voltage.

[0008] When the first detection module detects that the electrical device is electrically connected to the first interface, the first detection module detects whether the electrical connection between the charging device and the electrical device is stable within a preset time;

[0009] If the electrical connection between the charging device and the power-consuming device is stable, the first detection module transmits the control signal to the first control module;

[0010] The first control module is used to control the voltage conversion module to output the second voltage to the first interface according to the control signal.

[0011] In a possible implementation, the first interface includes a first pin and a second pin, the voltage conversion module is electrically connected to the first pin, and outputs the first voltage or the second voltage to the first pin, the first detection module is electrically connected to the second pin, and receives the control signal output by the electrical device through the second pin.

[0012] In one possible implementation, after the first detection module establishes communication with the electrical device, the first detection module outputs a feedback signal to the electrical device according to the control signal, and the feedback signal represents the feedback result after the first control module controls the voltage conversion module to output the voltage according to the control signal.

[0013] A second aspect of an embodiment of the present application provides a charging system, which includes: an electrical device and a charging device as described in any one of the above items including a first pin, wherein the charging device is electrically connected to the electrical device for charging the electrical device.

[0014] In a possible implementation, the electrical device includes a second interface, and the second interface includes a third pin;

[0015] When the electrical device is electrically connected to the charging device, the first pin of the first interface of the charging device is electrically connected to the third pin of the second interface of the electrical device, and the third pin is used to receive the voltage output by the first pin to charge the electrical device.

[0016] In a possible implementation, the electrical device further includes a second detection module and a second control module, and the second interface further includes a fourth pin;

[0017] The second control module is electrically connected to the third pin and the second detection module, and the second detection module is electrically connected to the fourth pin. When the second control module detects that the voltage of the third pin is less than a threshold, the second detection module establishes communication with the first detection module and outputs the control signal to the fourth pin.

[0018] In a possible implementation, when the second control module detects that the voltage of the third pin is greater than the threshold, the second detection module does not output the control signal to the fourth pin.

[0019] In a possible implementation manner, the first voltage is less than the threshold, and the second voltage is greater than the threshold.

[0020] A third aspect of the present application provides a charging method, which is applied to a charging device. The charging method includes:

[0021] Converting the AC voltage output by the external power supply into a first voltage and outputting the first voltage;

[0022] Detecting whether the electric device is electrically connected to the charging device, if the electric device is electrically connected to the charging device, the charging device establishes communication with the electric device and receives a control signal output by the electric device, the control signal is used to control the charging device to output a second voltage;

[0023] Detecting whether the electrical connection between the charging device and the power-consuming device is stable within a preset time;

[0024] If the electrical connection between the charging device and the power-consuming device is stable, the second voltage is output according to the control signal.

[0025] In a possible implementation, after establishing communication with the electrical device, a feedback signal is output to the electrical device according to the control signal, wherein the feedback signal indicates a feedback result after controlling the output voltage according to the control signal.

[0026] Therefore, the embodiments of the present application provide a charging device, a system and a charging method, which can adjust the output voltage of the charging device so that the electrical device can be quickly charged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of an application scenario of a charging system involved in the prior art.

[0028] Figure 2A block diagram of a charging system provided for one embodiment of the present application.

[0029] Figure 3 for Figure 2 Circuit diagram of the charging device and the power-consuming device.

[0030] Figure 4 A flowchart of a charging method provided for one embodiment of the present application.

[0031] Figure 5 for Figure 1 A schematic diagram of test results of output voltage and output current of a charging device in the prior art.

[0032] Figure 6 for Figure 3 Schematic diagram of test results of output voltage and output current of the charging device.

[0033] Main component symbols

[0034] Charging devices 101, 103

[0035] Electrical device 102

[0036] External power supply 104

[0037] Charging system 10

[0038] Voltage conversion module 31, 1011

[0039] The first control module 32

[0040] The second control module 22

[0041] Timing module 33

[0042] The first detection module 34

[0043] The second detection module 24

[0044] First interface 35, 1013

[0045] Second interface 1023

[0046] Capacitor C1

[0047] Resistors R1, R2, R3, R4

[0048] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0049] In the embodiments of the present application, the words "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order. For example, the first application, the second application, etc. are used to distinguish different applications, rather than to describe a specific order of applications. The features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0050] See also Figure 2 , Figure 2 FIG. 1 is a block diagram of a charging system 10 provided in accordance with an embodiment of the present application.

[0051] The charging system 10 includes a charging device 103 and an electric device 102. The charging device 103 is electrically connected to the electric device 102 and an external power source 104, and is used to receive an AC voltage output by the external power source 104, convert the AC voltage into a DC voltage, and output the DC voltage to the electric device 102 to charge the electric device 102.

[0052] In some embodiments, the charging device 103 may be a power adapter, the power-consuming device 102 may be a load device, such as an electronic device such as a mobile phone or a tablet computer, and the external power source 104 may be an AC generator or the like.

[0053] See also Figure 3 , Figure 3 Shown Figure 2 103 and the power-consuming device 102.

[0054] The charging device 103 may include a voltage conversion module 31 , a capacitor C1 , and a first interface 35 . The first interface 35 may include a pin VBUS.

[0055] In this embodiment, the voltage conversion module 31 is electrically connected to the external power supply 104, the first end of the capacitor C1, and the pin VUBS of the first interface 35, and is used to receive the AC voltage output by the external power supply 104, and convert the AC voltage into a DC voltage, and output it to the pin VBUS of the first interface 35. The pin VBUS of the first interface 35 can be connected to the pin VBUS of the second interface 1023 of the electrical device 102 through a cable to charge the electrical device 102 with the DC voltage. The capacitor C1 is used to filter the AC part of the DC voltage to reduce the fluctuation of the DC voltage and improve the working stability of the charging device 103.

[0056] In some embodiments, the voltage conversion module 31 may be a buck converter, a boost converter, a buck-boost converter or a flyback converter, and the first interface 35 and the second interface 1023 may be USB Type-C interfaces.

[0057] In some embodiments, the charging device 103 may further include a first detection module 34 , a resistor R1 , and a resistor R2 , and the first interface 35 may further include a pin CC1 and a pin CC2 .

[0058] The first input end of the first detection module 34 is electrically connected to the pin CC1 of the first interface 35 and the first end of the resistor R1. The second input end of the first detection module 34 is electrically connected to the pin CC2 of the first interface 35 and the first end of the resistor R2. The second end of the resistor R1 and the second end of the resistor R2 both receive a voltage VDD, wherein the voltage VDD may be provided by a DC power supply disposed inside the charging device 103, or may be obtained by converting an external AC voltage by the voltage conversion module 31.

[0059] In this embodiment, the first detection module 34 is used to detect the voltage value of the pin CC1 or the pin CC2 of the first interface 35 , and determine whether the charging device 103 is electrically connected to the power-consuming device 102 according to the detection result.

[0060] Specifically, when the charging device 103 is not electrically connected to the power device 102 , the first terminal voltage of the resistor R1 and the first terminal voltage of the resistor R2 are pulled up to the voltage VDD, and the first detection module 34 can determine that the charging device 103 is not electrically connected to the power device 102 based on the voltage VDD.

[0061] When the first interface 35 of the charging device 103 is connected to the second interface 1023 of the electrical device 102 through a cable, since the first end of the resistor R3 of the electrical device 102 is electrically connected to the first input end of the second detection module 24 and the pin CC1 of the second interface 1023, and the resistor R4 is electrically connected to the second input end of the second detection module 24 and the pin CC2 of the second interface 1023, the second end of the resistor R3 and the second end of the resistor R4 are both grounded. It can be understood that at this time, the resistor R1 and the resistor R3 form an electrical circuit, the resistor R2 and the resistor R4 form an electrical circuit, the first end voltage of the resistor R1 and the first end voltage of the resistor R2 change, and the first detection module 34 can determine that the charging device 103 and the electrical device 102 are connected.

[0062] The voltage at the first end of the resistor R3 and the voltage at the first end of the resistor R4 also change. At this time, the second detection module 24 can determine that the charging device 103 and the power-consuming device 102 are connected.

[0063] When the second detection module 24 can determine that the charging device 103 and the power device 102 are connected, the second detection module 24 can establish communication based on the fast charging protocol between the charging device 103 and the power device 102, and the charging device 103 and the power device 102 can exchange signals through pin CC1 or pin CC2.

[0064] It should be noted that, since a USB Type-C interface includes two directions, the charging device 103 and the power device 102 can include four connection directions, and different connection directions can determine that the charging device 103 and the power device 102 perform signal interaction through different pins. For example, when the connection direction between the charging device 103 and the power device 102 is the first direction, the pin CC1 of the charging device 103 is electrically connected to the pin CC2 of the power device 102, and at this time, the pin CC1 of the charging device 103 and the pin CC2 of the power device 102 perform signal interaction; when the connection direction between the charging device 103 and the power device 102 is the second direction, the pin CC2 of the charging device 103 is electrically connected to the pin CC2 of the power device 102, and at this time, the pin CC2 of the charging device 103 and the pin CC2 of the power device 102 perform signal interaction. For example, the first detection module 34 may receive a signal from the electrical device 102 regarding the fast charging protocol, such as a voltage boost request signal and a voltage drop request signal, and may also send a signal regarding the fast charging protocol to the electrical device 102 .

[0065] In some embodiments, the first detection module 34 may transmit a signal representing a combination of charging voltage and charging current supported by the charging device 103 to the second detection module 24 through pin CC1 or pin CC2 of the first interface 35. The second detection module 24 may select a combination of charging voltage and charging current from the combination and send it to the first detection module 34.

[0066] In some embodiments, the second detection module 24 can obtain the output voltage value that the charging device 103 can provide based on the voltage value at pin CC1 or pin CC2. Therefore, the voltage value of pin CC1 or pin CC2 can be changed by adjusting the resistance value of resistor R1 or resistor R2, so that the charging device 102 can obtain different charging voltages and charging current values ​​that the charging device 103 can provide.

[0067] In some embodiments, the charging device 103 may further include a timing module 33 .

[0068] The timing module 33 is electrically connected to the first detection module 34. After the first detection module 34 determines that the charging device 103 is electrically connected to the power-consuming device 102, the timing module 33 starts timing. The timing duration is a preset time. The first detection module 34 can detect whether the electrical connection with the second detection module 24 is stable within the preset time. Specifically, the first detection module 34 can detect whether the voltage value of pin CC1 or pin CC2 is stable. If the voltage value is stable, it is determined that the electrical connection with the second detection module 24 is stable, so as to perform subsequent signal interaction; if the voltage value is unstable, the timing module 33 can adjust the preset time until the first detection module 34 detects that the voltage value of pin CC1 or pin CC2 is stable.

[0069] In some embodiments, the charging device 103 may further include a first control module 32 .

[0070] The first control module 32 is electrically connected to the timing module 33, the voltage conversion module 31, and the first detection module 34. After the timing module 33 times out, the first detection module 34 transmits a signal representing the combination of the charging voltage and the charging current supported by the charging device 103 to the second detection module 24, and receives the communication data packet output by the power-consuming device 102 and transmits it to the first control module 32. The data packet may represent a voltage-boosting request, a voltage-reducing request, and other signals of the power-consuming device 102 for controlling the output voltage of the charging device 103. The first control module 32 may analyze the communication data packet and control the output voltage of the voltage conversion module 31.

[0071] For example, if the first detection module 34 receives a communication data packet transmitted by the electrical device 102, and the communication data packet indicates a voltage boost request, the first control module 32 can control the voltage conversion module 31 to increase the output voltage. After the voltage conversion module 31 increases the output voltage, the first detection module 34 can transmit the communication data packet to the first detection module 34, indicating that the voltage boost is completed. The first detection module 34 can transmit the data packet to the second detection module 24 through the first interface 35 and the second interface 1023 to provide feedback on the voltage boost request of the electrical device 102.

[0072] It should be noted that the second detection module 24 is electrically connected to the second control module 22, and the second control module 22 is electrically connected to the pin VBUS of the second interface 1023, and is used to detect the voltage of the pin VBUS. When the second control module 22 detects that the voltage of the pin VBUS is less than a threshold (for example, the threshold may be 3.4V), and the second detection module 24 determines that the charging device 103 and the power-consuming device 102 are connected, the second control module 22 may control the second detection module 24 to communicate with the first detection module 34.

[0073] When the second control module 22 detects that the voltage of the pin VBUS is greater than a threshold value, the second detection module 24 will not determine whether the charging device 103 is electrically connected to the power-consuming device 102, nor will it establish communication with the first detection module 34. The power-consuming device 102 will be charged using the voltage of the pin VBUS as the charging voltage. Therefore, when the voltage of the pin VBUS is large, the power-consuming device 102 cannot be charged quickly.

[0074] In some embodiments, when the charging device 103 is not electrically connected to the power device 102, the first control module 32 can control the output voltage of the voltage conversion module 31 to be a first voltage, which is less than the threshold value, to ensure that when the charging device 103 is electrically connected to the power device 102, the second detection module 24 can normally establish communication with the first detection module 34, the power device 102 can transmit a control signal requesting a voltage boost to the first detection module 34, and the first control module 32 can control the voltage conversion module 31 to output a second voltage based on the control signal, wherein the second voltage is greater than the threshold value, so as to quickly charge the power device 102.

[0075] See also Figure 4 , Figure 4 FIG. 1 is a flow chart of a charging method provided by an embodiment of the present application. Figure 4 As shown, the charging method is applied to the charging device 103, and the charging method includes the following steps:

[0076] Step S1: controlling the output voltage to be a first voltage.

[0077] In this embodiment, when the charging device 103 is connected to an external power source 104 , the first control module 32 controls the voltage conversion module 31 to output the first voltage to the pin VBUS of the first interface 35 .

[0078] In this embodiment, the first voltage is less than the threshold value. It can be understood that when the charging device 103 is not connected to the power-consuming device 102, since the first voltage is relatively small, the power consumption of the charging device 103 can be reduced, and the heating of the charging device 103 can be reduced.

[0079] Step S2: Determine whether the charging device is electrically connected to the power-consuming device.

[0080] In this embodiment, the charging device 103 is connected to the electrical device 102 through pin CC1 or pin CC2 of the first interface 35. When the first detection module 34 detects that the voltage of pin CC1 or pin CC2 of the first interface 35 is VDD, the first detection module 34 determines that the charging device 103 is not electrically connected to the electrical device 102. When the first detection module 34 detects that the voltage of pin CC1 or pin CC2 of the first interface 35 is less than VDD, the first detection module 34 determines that the charging device 103 is electrically connected to the electrical device 102.

[0081] Step S3: Detect whether the electrical connection between the charging device and the power-consuming device is stable within a preset time.

[0082] In this embodiment, when the first detection module 34 determines that the charging device 103 is electrically connected to the power-consuming device 102, the timing module 33 starts the timing and sets the timing time to a preset time. The first detection module 34 can detect whether the electrical connection with the second detection module 24 is stable within the preset time. If the electrical connection between the first detection module 34 and the second detection module 24 is stable, step S4 is executed. If the electrical connection between the first detection module 34 and the second detection module 24 is unstable, step S1 is executed, and the timing module 33 adjusts the preset time until the electrical connection between the first detection module 34 and the second detection module 24 is stable.

[0083] Step S4: controlling the output voltage to be a second voltage.

[0084] In this embodiment, when the timing of the timing module 33 times out, the first control module 32 controls the voltage conversion module 31 to output the second voltage to the pin VBUS of the first interface 35 to increase the output voltage of the charging device 103 and increase the charging power.

[0085] In this embodiment, the second voltage is 5V.

[0086] Step S5: controlling the output voltage to be a third voltage.

[0087] In this embodiment, when the output voltage of the charging device 103 reaches 5V, and the charging device 103 and the power-consuming device 102 have completed communication through pin CC1 or pin CC2 of the first interface 35, if the power-consuming device 102 supports the USB PD fast charging protocol, the power-consuming device 102 can continue to communicate with the charging device 103 through pin CC1 or pin CC2 of the second interface 1023, requesting the charging device 103 to continue to increase the output voltage so as to quickly charge the power-consuming device 102 based on the USB PD fast charging protocol.

[0088] See also Figure 5 , Figure 5 Shown Figure 1The output voltage and output current test diagram of the charging device 101 in the prior art. Figure 5 As shown, at time t1, the output voltage of the charging device 101 is 5V, and the output current is 500mA, and at this time, the first detection module 34 of the power-consuming device 102 has not yet determined that the charging device 101 is electrically connected to the power-consuming device 102. At time t2, the voltage of the pin CC1 or the pin CC2 of the first interface 35 changes, but the power-consuming device 102 will not send a control signal to the charging device 101, so the output voltage of the charging device 101 remains unchanged at 5V, and the output current will not change.

[0089] See also Figure 6 , Figure 6 Shown Figure 2 The output voltage and output current test diagram of the charging device 103. Figure 6 As shown, at time t1, the output voltage of the charging device 101 is 3.4V, and the first detection module 34 of the power device 102 determines that the charging device 101 is electrically connected to the power device 102. The voltage of the pin CC1 or the pin CC2 of the first interface 35 changes, and it can be considered that the charging device 103 is connected to the power device 102. At this time, the output voltage of the charging device 103 is the first voltage (for example, less than 3.6V). At time t2, the output voltage is 5V. It can be understood that the time period from t1 to t2 is the timing timeout time. In the time period from t1 to t2, the voltage of the port CC1 drops and recovers many times. It can be understood that at this time, the charging device 103 and the power device 102 communicate through the port CC1. After the communication is completed, the charging device 103 controls its output voltage to the second voltage (for example, 5V) to charge the power device 102. At time t3, the voltage of port CC1 changes, and the power consumption device 102 sends a voltage boost request to the charging device 103 through port CC1. The charging device 103 increases the output voltage to a third voltage (for example, 9V, 12V, 15V or 20V) for fast charging of the power consumption device 102 based on the USB PD fast charging protocol.

[0090] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.

Claims

1. A charging device for charging an electrical device, characterized in that: The charging device includes a voltage conversion module, a first control module, a first detection module, and a first interface; The voltage conversion module is electrically connected to the first control module, the external power supply, and the first interface. The first control module controls the voltage conversion module to convert the AC voltage output by the external power supply into a first voltage, and outputs the first voltage to the first interface. The first detection module is electrically connected to the first interface and is used to detect whether the electrical device is electrically connected to the first interface. When the first detection module detects that the electrical device is electrically connected to the first interface, the first detection module establishes communication with the electrical device and receives a control signal output by the electrical device, wherein the control signal is used to control the voltage conversion module to output a second voltage. When the first detection module detects that the electrical device is electrically connected to the first interface, the first detection module detects whether the electrical connection between the charging device and the electrical device is stable within a preset time; If the electrical connection between the charging device and the power-consuming device is stable, the first detection module transmits the control signal to the first control module; The first control module is used for controlling the voltage conversion module to output the second voltage to the first interface according to the control signal; Among them, when the electrical device is connected to the charging device and the received voltage is less than a threshold, it communicates with the first detection module, and the second voltage is the charging voltage of the electrical device after the first detection module establishes communication with the electrical device, the first voltage is less than the threshold, and the second voltage is greater than the threshold.

2. The charging device according to claim 1, characterized in that: The first interface includes a first pin and a second pin. The voltage conversion module is electrically connected to the first pin and outputs the first voltage or the second voltage to the first pin. The first detection module is electrically connected to the second pin and receives the control signal output by the electrical device through the second pin.

3. The charging device according to claim 2, characterized in that: After the first detection module establishes communication with the electrical device, the first detection module outputs a feedback signal to the electrical device according to the control signal, wherein the feedback signal represents a feedback result after the first control module controls the output voltage of the voltage conversion module according to the control signal; When the voltage conversion module outputs the second voltage, the first detection module continues to receive the control signal output by the electrical device, and the control signal is also used to control the voltage conversion module to output a third voltage.

4. A charging system, characterized in that: The charging system comprises: an electric device and a charging device as claimed in any one of claims 2 to 3, wherein the charging device is electrically connected to the electric device for charging the electric device.

5. The charging system according to claim 4, characterized in that: The electrical device comprises a second interface, and the second interface comprises a third pin; When the electrical device is electrically connected to the charging device, the first pin of the first interface of the charging device is electrically connected to the third pin of the second interface of the electrical device, and the third pin is used to receive the voltage output by the first pin to charge the electrical device.

6. The charging system according to claim 5, characterized in that: The electrical device further includes a second detection module and a second control module, and the second interface further includes a fourth pin; The second control module is electrically connected to the third pin and the second detection module, and the second detection module is electrically connected to the fourth pin. When the second control module detects that the voltage of the third pin is less than the threshold, the second detection module establishes communication with the first detection module and outputs the control signal to the fourth pin.

7. The charging system according to claim 6, characterized in that: When the second control module detects that the voltage of the third pin is greater than the threshold, the second detection module does not output the control signal to the fourth pin.

8. The charging system according to claim 7, characterized in that: When the first pin outputs the second voltage, the second pin continues to receive the control signal output by the electrical device, and the control signal is also used to control the voltage conversion module to output a third voltage; The third voltage is greater than the second voltage.

9. A charging method, applied to a charging system, the charging system comprising a charging device and an electric device, characterized in that: The charging method comprises: Converting an AC voltage output by an external power source into a first voltage and outputting the first voltage; Detecting whether the electric device is electrically connected to the charging device, when the electric device is electrically connected to the charging device, the charging device establishes communication with the electric device and receives a control signal output by the electric device, wherein the control signal is used to control the charging device to output a second voltage; Detecting whether the electrical connection between the charging device and the power-consuming device is stable within a preset time; If the electrical connection between the charging device and the electrical device is stable, the second voltage is output according to the control signal; wherein, when the electrical device is connected to the charging device and the received voltage is less than a threshold value, the electrical device communicates with the charging device, and the second voltage is the charging voltage of the electrical device after the charging device establishes communication with the electrical device, the first voltage is less than the threshold value, and the second voltage is greater than the threshold value.

10. The charging method according to claim 9, characterized in that: After establishing communication with the electrical device, the charging method further includes: Outputting a feedback signal to the power-consuming device according to the control signal, wherein the feedback signal represents a feedback result after the output voltage of the charging device is controlled according to the control signal; When the charging device outputs the second voltage, the control signal output by the power-consuming device continues to be received, and the control signal is also used to control the charging device to output a third voltage.

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