CN104993558A - Power protection system and method of mobile device - Google Patents

Abstract

The invention provides a power supply protection system and method of a mobile device. The system includes: a charging unit that includes an input terminal connected to the power adapter and the battery, and has an output terminal and an enabling terminal, and is used to output a strobe signal when it is determined that the battery is charged by the power adapter; When the hardware command is started, the charging permission signal is not output, and the corresponding hardware is started with a delay; and when a stop hardware command is detected, the corresponding hardware is stopped, and the charging permission signal is output with a delay; The output terminal of the processing unit is connected to the two input terminals, and the output terminal is connected to the protection unit of the enabling terminal of the charging unit, which is used to determine whether to output an enabling signal allowing charging of the battery to the enabling terminal by analyzing the signals of the two output terminals; If the enable signal is output, the battery is charged. The invention can prevent the current impact on the charging circuit caused by hardware starting and stopping during the process of charging the battery by the power adapter.

Description

Power supply protection system and method for mobile equipment

technical field

The invention relates to a power protection technology, in particular to a power protection system and method for mobile equipment.

Background technique

With the intelligentization of mobile phones, mobile phones bring people a convenient lifestyle, and many functions are integrated into mobile phones. Such as online shopping, games, and Internet of Things control functions through mobile phones and other controlled electronic devices. A mobile phone is no longer just for calling and sending text messages as it used to be. This will inevitably require the phone to have a long battery life. People often use mobile devices such as mobile phones while charging.

Using a mobile device while charging will increase the power consumption of its charging circuit, and the direct negative result is that the phone becomes hot. The internal integrated chip is often in the limit working state. The long-term heat loss and the impact of the instantaneous current change when the hardware starts and stops will greatly reduce the service life of the internal charging chip, or even damage it.

Therefore, it is necessary to protect the existing charging circuit.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a power supply protection system and method for mobile devices, which are used to solve the problem in the prior art that the hardware starts and stops the current impact on the charging circuit during the charging process.

In order to achieve the above object and other related objects, the present invention provides a power supply protection system for mobile equipment, including: a charging unit, including: two input terminals respectively connected to the power adapter and the battery, and having an output terminal and an enabling terminal, It is used to output a strobe signal when it is determined that the battery is charged by the power adapter based on comparing the voltage of the power adapter and the voltage of the battery; the processing unit is used to not execute when detecting that there is a startup hardware instruction in the mobile device. Outputting a charge-allowing signal, and starting the corresponding hardware with a delay; and being used to stop the corresponding hardware when detecting that there is a stop hardware instruction in the mobile device, and output a charge-allowing signal with a delay; the protection unit includes: respectively communicating with the charging unit The two input terminals connected to the output terminal of the charging unit and the output terminal of the processing unit, and the output terminal is connected to the enable terminal of the charging unit, and are used to determine whether to Outputting an enabling signal allowing charging of the battery to the enabling terminal; if the enabling signal is output, the charging unit charges the battery.

Preferably, the charging unit includes: a power adapter battery detection module, including: two input terminals and an output terminal respectively connected to the power adapter and the battery, for determining whether the The power adapter charges the battery, and outputs a strobe signal to the output terminal of the charging unit when it is determined that the battery is charged by the power adapter; the power supply selection module connected to the output terminal of the battery detection module of the power adapter, It is used to select the power supply from the power adapter to the hardware of the mobile device based on the strobe signal; the charging module whose control terminal is connected to the enabling terminal of the charging unit is used to determine the charging module based on the received enabling signal. The above-mentioned power adapter charges the battery.

Preferably, the protection unit includes: an enabling control module, including two input terminals respectively connected to the output terminal of the charging unit and the output terminal of the processing unit, and an output terminal connected to the enabling terminal of the charging unit The terminal is used for outputting the enable signal to the enable terminal when receiving the strobe signal and the charging permission signal.

Preferably, the processing unit is configured to set the first delay time for starting corresponding hardware based on the time it takes for the protection unit to respond to whether to output an enabling signal to the enabling terminal to allow charging of the battery; and Based on the time it takes for the hardware to stop running in response to the stop command, a second delay time for delaying the output of the charging permission signal is set.

Preferably, the instruction for starting hardware and the instruction for stopping hardware include at least one or more of the following combinations: instructions for starting and stopping hardware related to voice call services, instructions for starting and stopping hardware related to sensing services , Instructions to start and stop hardware related to human-computer interaction services.

Based on the above-mentioned purpose, the present invention provides a power supply protection method for a mobile device, including: when it is determined that the battery is charged by the power adapter based on comparing the voltage of the power adapter and the voltage of the battery, outputting a strobe signal; when a start hardware command is detected, Do not output the charging permission signal, and start the corresponding hardware with a delay; and when a stop hardware command is detected, stop the corresponding hardware, and delay the output of the charging permission signal; by analyzing the combination of the strobe signal and the charging permission signal, determine whether Allow the power adapter to charge the battery.

Preferably, the method further includes: selecting the power adapter to supply power to the hardware of the mobile device based on the strobe signal.

Preferably, when the start hardware instruction is detected, the charging permission signal is not output, and the corresponding hardware is started with a delay; and when the stop hardware instruction is detected, the corresponding hardware is stopped, and the charging permission signal is output after a delay Including: setting the first delay time for starting the corresponding hardware based on the time it takes to allow the battery to be charged in response; The second delay time.

Preferably, the instruction for starting hardware and the instruction for stopping hardware include at least one or more of the following combinations: instructions for starting and stopping hardware related to voice call services, instructions for starting and stopping hardware related to sensing services , Instructions to start and stop hardware related to human-computer interaction services.

As mentioned above, the power supply protection system and method for mobile devices of the present invention have the following beneficial effects: when a start hardware command is detected, the charging permission signal is not output, and when a stop hardware command is detected, the charging permission is output after a delay The signal can prevent the current impact of the hardware start and stop on the charging circuit during the charging process of the power adapter to the battery; the delay start and delay output allow charging signal can prevent the instantaneous large current generated when the hardware starts and stops.

Description of drawings

FIG. 1 is a schematic diagram of a power protection system for a mobile device of the present invention.

FIG. 2 is a schematic diagram of a preferred mode of the power protection system for mobile devices of the present invention.

FIG. 3 is a flowchart of a power protection method for a mobile device of the present invention.

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

See Figure 1. The invention provides a power supply protection system of a mobile device. The mobile device includes hardware that is commanded to enable/disable activation. For example, if the mobile device is a mobile phone, when the voice communication instruction is received, the speaker and its peripheral circuits in the mobile device are activated. The power supply protection system is used to protect the influence of the current impact on the charging circuit of the battery from the current impact generated by the hardware in the mobile device when it starts and stops during charging.

The power protection system 3 is located in the mobile device, and includes: a charging unit 31 , a processing unit 32 , and a protection unit 33 .

The charging unit 31 includes: two input terminals connected to the power adapter 1 and the battery 2 respectively, and has an output terminal and an enabling terminal, which are used for determining the power by the power adapter 1 and the battery 2 based on comparing the voltage of the power adapter 1 and the battery 2. When the power adapter 1 is charging the battery 2, it outputs a gate signal.

Specifically, when the power adapter 1 is connected to an external power source (such as a charger, a USB power supply device), the charging unit 31 determines whether the power adapter 1 is charged to the battery by comparing the voltage of the power adapter 1 and the battery 2. Battery 2 is charged. When the voltage of the power adapter 1 is greater than the voltage of the battery 2, it is determined that the battery 2 is charged by the power adapter 1, and a strobe signal is output (for example, a high level of a preset voltage is output). On the contrary, the strobe signal is not output (for example, low level is output). When the charging unit 31 outputs a strobe signal, it is not certain that the power adapter 1 can charge the battery 2 . The further monitoring results of the processing unit 32 are required.

Preferably, as shown in FIG. 2 , the charging unit 31 includes: a power adapter battery detection module 311 , a power supply selection module 312 , and a charging module 313 . Wherein, the charging unit 31 can be an integrated circuit including a power adapter battery detection module 311 , a power supply selection module 312 , and a charging module 313 .

The power adapter battery detection module 311 includes: two input terminals and an output terminal connected to the power adapter 1 and the battery 2 respectively, for determining whether the power adapter 1 is powered by the battery 2 based on comparing the voltage of the power adapter 1 and the voltage of the battery 2 The adapter 1 charges the battery 2 , and outputs a strobe signal to the output terminal of the charging unit 31 when it is determined that the battery 2 is charged by the power adapter 1 .

The power supply selection module 312 is also connected to the output terminal of the power adapter battery detection module 311 , and is used for selecting power supply from the power adapter 1 to the hardware of the mobile device based on the gate signal. Wherein, the power supply selection module 312 includes: a first switch circuit connected between the power adapter 1 and the system power output port of the mobile device, and a first switch circuit connected between the battery 2 and the system power output port Between the second switch circuit.

Specifically, when the power supply selection module 312 receives a valid strobe signal, it controls the first switch circuit to be turned on, and controls the second switch circuit between the battery 2 and the system power output port to be turned off. open. Under the control of the power supply selection module 312, the power adapter 1 supplies power to the system power output port. Wherein, the system power output port is connected to the power ports of each hardware in the mobile device.

When the power supply selection module 312 receives an invalid strobe signal, it controls the first switch circuit to be turned off, and controls the second switch circuit to be turned on. Under the control of the power supply selection module 312, the battery 2 supplies power to the system power output port.

The charging module 313 includes: a control terminal connected to the enabling terminal of the charging unit 31 , configured to determine that the power adapter 1 charges the battery 2 based on the received enabling signal.

Here, the charging module 313 may include a DC-DC converter connected to the power adapter 1 and a control circuit of the DC-DC converter. Wherein, the control circuit is connected to the enable terminal, and connects the electrical connection between the DC-DC converter and the battery 2 when receiving the enable signal.

The processing unit 32 is used for not outputting the charging permission signal when detecting that there is a start hardware instruction in the mobile device, and delaying starting the corresponding hardware; and for stopping the corresponding hardware when detecting that there is a stop hardware instruction in the mobile device. Hardware, and delay output to allow charging signal.

Here, the instruction for starting hardware and the instruction for stopping hardware include at least one or more of the following combinations: instructions for starting and stopping hardware related to voice call services, instructions for starting and stopping hardware related to sensing services , Instructions to start and stop hardware related to human-computer interaction services. The instruction to start the hardware and the instruction to stop the hardware may both be digital information, or may be level transition edges. The instruction to start the hardware may be an instantaneous instruction, and may also last from the start to the instruction to stop the hardware.

Specifically, when the processing unit 32 detects that there is an instruction to start the hardware in the mobile device, it does not immediately start the corresponding hardware, but temporarily stores the instruction first, and does not output a charging permission signal to the protection unit 33. After the first delay time, execute the instruction to start the corresponding hardware. Wherein, the first delay time is set based on the time it takes for the protection unit 33 to respond to whether to output an enable signal to the enable terminal to allow charging of the battery 2 . The first delay time may be equal to or slightly longer than the time it takes for the protection unit 33 to respond to whether to output an enable signal to the enable terminal to allow charging of the battery 2 .

The processing unit 32 may output a charging permission signal after receiving the startup command of the corresponding hardware and delaying startup of the corresponding hardware. In this way, the current impact during the hardware startup process is avoided.

Alternatively, the processing unit 32 does not output the charging permission signal during the period from when it receives the startup command of the corresponding hardware until it receives the stop command of the same hardware based on the stop command. After the second delay period based on the stop hardware instruction, the processing unit 32 outputs a charging permission signal. Wherein, the second delay time is set based on the time it takes for the hardware to stop running in response to the stop instruction. The second delay time may be equal to or slightly greater than the time it takes for the hardware to stop running. In this way, the battery 2 is not charged during the entire hardware operation period. The influence of the current fluctuation generated during the hardware start, run and stop on the charging of the battery 2 is avoided.

The protection unit 33 includes: two input terminals respectively connected to the output terminal of the charging unit 31 and the output terminal of the processing unit 32, and the output terminal is connected to the enabling terminal of the charging unit 31, for analyzing the The output terminal of the charging unit 31 and the signal of the output terminal of the processing unit 32 determine whether to output the enabling signal allowing the battery 2 to be charged to the enabling terminal; if the enabling signal is output, the charging unit 31 sends The battery 2 is charged.

Here, the protection unit 33 includes an enabling control module.

The enabling control module includes two input terminals connected to the output terminal of the charging unit 31 and the output terminal of the processing unit 32 respectively, and an output terminal connected to the enabling terminal of the charging unit 31, for When the strobe signal and the charging permission signal are received, the enabling signal is output to the charging unit 31 . For example, the enabling control module includes an AND gate. When the gate signal and the charge-allowing signal are both at high level, the AND gate outputs a high level, and the high level is the enabling signal. The charging unit 31 allows the power adapter 1 to charge the battery 2 based on the enable signal.

For example, when the charging unit 31 determines that the power adapter 1 is charging the battery 2, when the user initiates a voice call, the processing unit 32 receives an operation instruction from the user to make a call, and then determines to activate the handset, microphone, and antenna based on the instruction. , RF communication module and other hardware. At this time, the processing unit 32 does not immediately start each hardware to perform the operation of initiating a voice call, but continues not to output the charging permission signal (such as outputting a low level) based on the operation instruction, and after a delay After a period of time, start the corresponding hardware to perform the operation of initiating a voice call. The protection unit 33 determines not to output the enabling signal to the enabling terminal of the charging unit 31 based on not receiving the charging permission signal and receiving the strobe signal of the charging unit 31, then the charging Unit 31 does not allow power adapter 1 to charge said battery 2 .

When the user ends the voice call and hangs up, the processing unit 32 receives an operation instruction of the user to hang up the phone, and then determines to stop hardware such as the handset, microphone, antenna, and radio frequency communication module based on the instruction. At this time, the processing unit 32 does not immediately stop each hardware to perform the operation of ending the voice call, but outputs a charge-allowing signal (such as a high level) based on the operation command, and stops after a long delay. Appropriate hardware to perform actions to end voice calls. The protection unit 33 determines to output an enabling signal to the enabling terminal of the charging unit 31 based on the charging permission signal and the strobe signal of the charging unit 31, and the charging unit 31 allows the power adapter 1 to The battery 2 is charged.

As shown in Figure 2, the structure of the power protection system 3 is exemplified as follows:

The power protection system 3 includes: a charging unit 31 , a processing unit 32 and a protection unit 33 . The charging unit 31 includes: a power adapter battery detection module 311 , a power supply selection module 312 , and a charging module 313 . The protection unit 33 includes: an enabling control module.

Wherein, two input ends of the power adapter battery detection module 311 are connected to the power adapter 1 and the battery 2 respectively, and an output end is connected to an input end of the enabling control module. The other input end of the enabling control module is also connected to the processing unit 32 , and its output end is connected to the charging module 313 . Both the first switch circuit and the second switch circuit in the power supply selection module 312 are connected to the output terminal of the power adapter battery detection module 311 .

The working process of the power protection system 3 shown in Figure 2 is as follows:

When the power adapter 1 is connected to an external power source, the battery detection module 311 of the power adapter compares that the voltage of the power adapter 1 is greater than the voltage of the battery 2, so a high-level strobe signal is output to the first power supply selection module 312 respectively. A switch circuit and a second switch circuit, and an input terminal to the enabling control module. When the processing unit 32 receives the start command of the hardware, it temporarily stores the start command, and outputs a low level to the other input terminal of the enabling control module, that is, does not output the permission indicated by the high level The charging signal is not output until the second delay time when the stop command of the same hardware is received, the charging permission signal is output. During this period, the AND gate in the enabling control module receives a high-level strobe signal and a low level output by the processing unit 32, and sends the signal to the control terminal of the charging module 313 (corresponding to the charging unit 31 enable terminal) outputs a low-level electrical signal (that is, does not output an enable signal), then the charging module 313 does not allow the power adapter 1 to charge the battery 2 . Wherein, the processing unit 32 executes the startup instruction after a first delay time, and immediately stops the hardware operation when receiving the stop instruction.

When the processing unit 32 outputs a charging permission signal, the AND gate receives a high-level strobe signal and a high-level charging permission signal, and outputs a high-level electrical signal to the control terminal of the charging module 313, Then the charging module 313 allows the power adapter 1 to charge the battery 2 .

See Figure 3. The invention provides a power supply protection method of a mobile device. The power protection method is mainly executed by a power protection system installed in the mobile device. The mobile device includes hardware that is commanded to enable/disable activation. For example, if the mobile device is a mobile phone, when the voice communication instruction is received, the speaker and its peripheral circuits in the mobile device are activated. The power supply protection system is used to protect the influence of the current impact on the charging circuit of the battery from the current impact generated by the hardware in the mobile device when it starts and stops during charging.

The power protection system is located in the mobile device, and includes: a charging unit, a processing unit, and a protection unit.

The charging unit includes: two input terminals respectively connected to the power adapter and the battery, and has an output terminal and an enabling terminal. In step S1, the charging unit outputs a gate signal when it is determined that the battery is charged by the power adapter based on comparing the voltage of the power adapter and the voltage of the battery.

Specifically, when the power adapter is connected to an external power source (such as a charger, a USB power supply device), the charging unit determines whether to charge the battery by the power adapter by comparing the voltages of the power adapter and the battery. When the voltage of the power adapter is greater than the voltage of the battery, it is determined that the battery is charged by the power adapter, and a strobe signal is output (for example, a high level of a preset voltage is output). On the contrary, the strobe signal is not output (for example, low level is output). When the charging unit outputs a strobe signal, it is not certain that the power adapter can charge the battery. Instead, further monitoring results by the processing unit are required.

Preferably, as shown in FIG. 2 , the charging unit includes: a power adapter battery detection module, a power supply selection module, and a charging module. Wherein, the charging unit may be an integrated circuit including a power adapter battery detection module, a power supply selection module, and a charging module. The step S1 includes steps S11, S12 and S13. (None are shown)

The power adapter battery detection module includes: two input terminals and an output terminal respectively connected to the power adapter and the battery. In step S11, the battery detection module of the power adapter determines whether the battery is charged by the power adapter based on comparing the voltage of the power adapter and the voltage of the battery, and outputs a selection communication when it is determined that the battery is charged by the power adapter signal to the output of the charging unit.

The power supply selection module is also connected to the output terminal of the battery detection module of the power adapter. In step S12, the power supply selection module selects the hardware of the mobile device to be powered by the power adapter based on the strobe signal. Wherein, the power supply selection module includes: a first switch circuit connected between the power adapter and the system power output port of the mobile device, and a second switch circuit connected between the battery and the system power output port Two switching circuits.

Specifically, when the power supply selection module receives a valid strobe signal, it controls the first switch circuit to be turned on, and controls the second switch circuit between the battery and the system power output port to be turned off. Under the control of the power supply selection module, the power adapter supplies power to the system power output port. Wherein, the system power output port is connected to the power ports of each hardware in the mobile device.

When the power supply selection module receives an invalid strobe signal, it controls the first switch circuit to be turned off, and controls the second switch circuit to be turned on. Under the control of the power supply selection module, the battery supplies power to the system power output port.

The charging module includes: a control terminal connected to the enabling terminal of the charging unit. In step S13, the charging module determines that the power adapter charges the battery based on the received enabling signal.

Here, the charging module may include a DC-DC converter connected to a power adapter, and a control circuit of the DC-DC converter. Wherein, the control circuit is connected to the enable terminal, and connects the electrical connection between the DC-DC converter and the battery when receiving the enable signal.

In step S2, when the processing unit detects that there is a start hardware instruction in the mobile device, it does not output the charging permission signal, and delays starting the corresponding hardware; and when it detects that there is a stop hardware instruction in the mobile device, Stop the corresponding hardware, and delay the output to allow the charging signal.

Here, the instruction to start hardware and the instruction to stop hardware include at least one or more of the following combinations: instructions to start and stop hardware related to voice call services, instructions to start and stop hardware related to sensing services , Instructions to start and stop hardware related to human-computer interaction services. The instruction for starting the hardware and the instruction for stopping the hardware may both be digital information, or may be level transition edges. The instruction to start the hardware may be an instantaneous instruction, and may also last from the start to the instruction to stop the hardware.

Specifically, when the processing unit detects that there is an instruction to start the hardware in the mobile device, it does not immediately start the corresponding hardware, but temporarily stores the instruction first, and does not output a charging permission signal to the protection unit. After a long delay, execute this command to start the corresponding hardware. Wherein, the first delay time is set based on the time it takes for the protection unit to respond to whether to output an enable signal to the enable terminal to allow charging of the battery. The first delay time may be equal to or slightly longer than the time it takes for the protection unit to respond to whether to output an enable signal to the enable terminal to allow charging of the battery.

The processing unit may output a charging permission signal after receiving the startup command of the corresponding hardware and delaying startup of the corresponding hardware. In this way, the current impact during the hardware startup process is avoided.

Alternatively, the processing unit does not output the charging permission signal during the period from when it receives the startup instruction of the corresponding hardware until it receives the stop instruction of the same hardware to stop running. After a second delay period based on the stop hardware instruction, the processing unit outputs a charging permission signal. Wherein, the second delay time is set based on the time it takes for the hardware to stop running in response to the stop instruction. The second delay time may be equal to or slightly greater than the time it takes for the hardware to stop running. As such, the battery is not charged during the entire hardware operation. It avoids the impact of current fluctuations generated during hardware start, run and stop on battery charging.

The protection unit includes: two input terminals respectively connected to the output terminal of the charging unit and the output terminal of the processing unit, and the output terminal is connected to the enabling terminal of the charging unit. In step S3, the protection unit determines whether to output an enable signal to the enable terminal to allow charging of the battery by analyzing the combination of the strobe signal and the allow charging signal; if the enable signal is output, the The charging unit charges the battery.

Here, the protection unit includes an enabling control module.

The enabling control module includes two input terminals respectively connected to the output terminal of the charging unit and the output terminal of the processing unit, and an output terminal connected to the enabling terminal of the charging unit, for receiving the outputting the enable signal to the charging unit when the strobe signal and the charging enable signal are activated. For example, the enable control module includes an AND gate. When the gate signal and the charge-allowing signal are both at high level, the AND gate outputs a high level, and the high level is the enabling signal. The charging unit allows the power adapter to charge the battery based on the enabling signal.

For example, when the charging unit determines that the power adapter is charging the battery, when the user initiates a voice call, the processing unit receives an operation instruction for the user to make a call, and then determines to activate the handset, the microphone, the antenna, and the radio frequency communication module based on the instruction. and other hardware. At this time, the processing unit does not immediately start each hardware to perform the operation of initiating a voice call, but continues not to output the charging permission signal (such as outputting a low level) based on the operation instruction, and waits for a long time to delay. Then start the corresponding hardware to perform the operation of initiating a voice call. The protection unit determines not to output the enabling signal to the enabling terminal of the charging unit based on not receiving the charging permission signal and receiving the strobe signal of the charging unit, then the charging unit does not allow A power adapter charges the battery.

When the user ends the voice call and hangs up, the processing unit receives an operation instruction of the user to hang up the phone, and then determines to stop hardware such as the handset, microphone, antenna, and radio frequency communication module based on the instruction. At this time, the processing unit does not immediately stop each hardware to perform the operation of ending the voice call, but outputs a charging permission signal (such as a high level) based on the operation command, and stops the corresponding charging after a long time delay. hardware to perform an action to end a voice call. The protection unit determines to output an enabling signal to the enabling terminal of the charging unit based on the charging permission signal and the strobe signal of the charging unit, and the charging unit allows the power adapter to charge the battery.

In summary, in the present invention, when a start hardware instruction is detected, the charging permission signal is not output, and when a stop hardware instruction is detected, the charging permission signal is output after a delay, which can prevent the power adapter from starting the hardware during the charging process of the battery. and stop the current impact on the charging circuit; delay start and delay output allow charging signal, which can prevent the instantaneous large current generated when the hardware starts and stops. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (9)

1. A power protection system for a mobile device, comprising: A charging unit, comprising: two input terminals connected to the power adapter and the battery respectively, and having an output terminal and an enable terminal, used for charging the battery from the power adapter to the battery based on comparing the voltage of the power adapter and the battery When charging, output a strobe signal; The processing unit is used for not outputting the charging permission signal when detecting that there is a start hardware instruction in the mobile device, and delays starting the corresponding hardware; and for stopping the corresponding hardware when detecting that there is a stop hardware instruction in the mobile device, And delay output to allow charging signal; A protection unit, comprising: two input terminals respectively connected to the output terminal of the charging unit and the output terminal of the processing unit, and the output terminal is connected to the enabling terminal of the charging unit, for analyzing the output of the charging unit terminal and the output terminal of the processing unit to determine whether to output an enable signal to the enable terminal to allow charging of the battery; if the enable signal is output, the charging unit charges the battery. 2. The power supply protection system of a mobile device according to claim 1, wherein the charging unit comprises: The power adapter battery detection module includes: two input terminals and output terminals respectively connected to the power adapter and the battery, for determining whether the battery is charged by the power adapter based on comparing the voltage of the power adapter and the voltage of the battery, and outputting a strobe signal to the output terminal of the charging unit when it is determined that the battery is charged by the power adapter; A power supply selection module connected to the output terminal of the battery detection module of the power adapter, for selecting the power supply from the power adapter to the hardware of the mobile device based on the strobe signal; The charging module whose control terminal is connected to the enabling terminal of the charging unit is used to determine that the power adapter charges the battery based on the received enabling signal. 3. The power supply protection system of the mobile device according to claim 1, wherein the protection unit comprises: An enabling control module, comprising two input terminals respectively connected to the output terminal of the charging unit and the output terminal of the processing unit, and an output terminal connected to the enabling terminal of the charging unit, for receiving the When the strobe signal and the charging permission signal are used, the enable signal is output to the enable terminal. 4. The power supply protection system of a mobile device according to claim 1, wherein the processing unit is configured to respond to whether the protection unit outputs an enabling signal to the enabling terminal to allow charging of the battery. Set the first delay time for starting the corresponding hardware; and set the second delay time for delaying the output of the charging permission signal based on the time it takes for the hardware to stop running in response to the stop command. 5. The power supply protection system for mobile devices according to claim 1, wherein the instruction to start hardware and the instruction to stop hardware include at least one or more of the following combinations: start and stop the voice call service-related Instructions for hardware, instructions for starting and stopping hardware related to sensing services, instructions for starting and stopping hardware related to human-computer interaction services. 6. A power supply protection method for a mobile device, comprising: When it is determined that the battery is charged by the power adapter based on comparing the voltage of the power adapter and the voltage of the battery, a strobe signal is output; When the start hardware instruction is detected, the charging permission signal is not output, and the corresponding hardware is started with a delay; and when the stop hardware instruction is detected, the corresponding hardware is stopped, and the charging permission signal is output with a delay; Determine whether to allow the power adapter to charge the battery by analyzing the combination of the strobe signal and the allow charging signal. 7 . The power protection method of the mobile device according to claim 6 , further comprising: selecting, based on the strobe signal, that the power adapter supplies power to the hardware of the mobile device. 8 . 8. The power supply protection method of the mobile device according to claim 6, characterized in that, when the start hardware instruction is detected, the charging permission signal is not output, and the corresponding hardware is started with a delay; and when a stop is detected When the hardware is commanded, the methods of stopping the corresponding hardware and delaying the output of the charging signal include: Based on the length of time it takes to allow the battery to be charged in response, set the first delay time for starting the corresponding hardware; and set the second time delay for outputting the charging permission signal based on the time it takes for the hardware to stop running in response to the stop command Delay duration. 9. The power supply protection method of a mobile device according to claim 6, wherein the instruction to start hardware and the instruction to stop hardware include at least one or more of the following combinations: start and stop the voice call service-related Instructions for hardware, instructions for starting and stopping hardware related to sensing services, instructions for starting and stopping hardware related to human-computer interaction services.