An emergency power supply control circuit

Abstract

The present application relates to an emergency power supply control circuit, and relates to the technical field of emergency power supply, including a power supply module, a power supply module, a charging detection module, a charging display module, a power detection module, a power display module, a main control chip U2 and several output sockets; the main control chip U2 includes a power supply pin, a charging detection pin and a power detection pin, the output end of the power supply module is connected, the output end of the charging detection module is connected to the charging detection pin of the main control chip U2, and the output end of the power detection module is connected to the power detection pin of the main control chip U2; the main control chip U2 also includes a charging display control pin and a power display control pin, the charging display control pin is connected to the input end of the charging display module, and the power display control pin is connected to the input end of the power display module. The present application has the effect of improving the convenience of using the emergency power supply.

Description

Technical Field

[0001] This application relates to the field of emergency power supply technology, and in particular to an emergency power supply control circuit. Background Technology

[0002] The main function of emergency power supplies is to provide emergency power in the event of a failure or power outage of the normal power supply, so as to ensure the safe operation of important facilities and equipment and avoid major losses and hazards.

[0003] Regarding the aforementioned technologies, it is necessary to constantly check the current power level of the emergency power supply and promptly recharge any low-power emergency power supplies to ensure that the emergency power supply can be put into use in a timely manner in the event of a sudden failure of the normal power supply. Summary of the Invention

[0004] The purpose of this application is to provide an emergency power supply control circuit that can detect and display the charging status and power status of the emergency power supply, thereby improving ease of use.

[0005] Firstly, the emergency power supply control circuit provided in this application adopts the following technical solution:

[0006] An emergency power supply control circuit includes a power module, a power supply module, a charging detection module, a charging display module, a power detection module, a power display module, a main control chip U2, and several output sockets. The output terminals of the power module include a charging output terminal and a battery output terminal. The charging output terminal is connected to the input terminal of the charging detection module, and the battery output terminal is connected to the input terminal of the power supply module, the input terminal of the power detection module, and the input terminals of several output sockets, respectively.

[0007] The main control chip U2 includes a power supply pin, a charging detection pin, and a power detection pin. The output terminal of the power supply module is connected to the power supply pin, the output terminal of the charging detection module is connected to the charging detection pin of the main control chip U2, and the output terminal of the power detection module is connected to the power detection pin of the main control chip U2.

[0008] The main control chip U2 also includes a charging display control pin and a power display control pin. The charging display control pin is connected to the input terminal of the charging display module, and the power display control pin is connected to the input terminal of the power display module.

[0009] By adopting the above technical solution, this application uses a charging detection module and a main control chip U2 to detect the current charging status of the emergency power supply, and displays the current charging status of the emergency power supply through a charging display module. This allows users to check the charging status at any time during the charging process. At the same time, this application uses a power detection module and a main control chip U2 to detect the current power status of the emergency power supply, and displays the current power status of the emergency power supply through a power display module. This allows users to obtain the current power status of the emergency power supply at any time, so as to charge the emergency power supply in a timely manner, ensuring that it can be put into use in an emergency and improving ease of use.

[0010] Furthermore, the power supply module includes a voltage regulator chip U1, a diode D2, a resistor R20, an electrolytic capacitor EC3, an electrolytic capacitor EC4, and a capacitor C9. The voltage regulator chip U1 includes a voltage regulation input pin and a voltage regulation output pin.

[0011] The battery output terminal of the power module is connected to the regulated input pin through diode D2 and resistor R20. The regulated input pin is grounded through electrolytic capacitor EC3. The regulated output pin is the power supply output terminal, which is connected to the power supply pin of the main control chip U2. The regulated output pin is grounded through electrolytic capacitor EC4 and capacitor C9 connected in parallel.

[0012] By adopting the above technical solution, this application uses a power supply module to regulate the power output from the battery, thereby providing a stable voltage to the main control chip U2 and ensuring that the normal operation of the main control chip U2 is not affected by the power supply.

[0013] Furthermore, the charging detection module includes resistors R14 and R15 and transistor Q1;

[0014] The charging output terminal of the power module is connected to the base of transistor Q1 through resistor R14. Resistor R14 is grounded through resistor R15. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected to the charging detection pin of the main control chip U2.

[0015] By adopting the above technical solution, this application connects the charging detection module and the main control chip U2 to detect the current charging status of the emergency power supply, ensuring that the charging status of the emergency power supply meets the requirements.

[0016] Furthermore, the charging display module includes resistors R18 and R19, and a dual-color light-emitting diode LED5, wherein the dual-color light-emitting diode LED5 includes a first light-emitting diode and a second light-emitting diode with different colors;

[0017] The main control chip U2 has a charging display output pin, which includes a first charging display output pin for outputting a charging signal and a second charging display output pin for outputting a fully charged signal. The first charging display output pin is connected to the input terminal of a first light-emitting diode through a resistor R18, and the second charging display output pin is connected to the input terminal of a second light-emitting diode through a resistor R19. The output terminals of the first and second light-emitting diodes are grounded.

[0018] By adopting the above technical solution, this application uses the dual-color light-emitting diode LED5 of the charging display module to display the current charging status detected by the charging detection module and the main control chip U2. When the charging status is charging, the main control chip U2 controls the first light-emitting diode to turn on. When the charging status is fully charged, the main control chip U2 controls the second light-emitting diode to turn on, so that the user can obtain the current charging status in a timely manner, improving the convenience of use.

[0019] Furthermore, the power detection module includes resistor R16, resistor R17, and capacitor C8;

[0020] The battery output terminal of the power module is connected to the power detection pin of the main control chip U2 via resistor R17. Resistor R17 is grounded via parallel resistor R16 and capacitor C8.

[0021] By adopting the above technical solution, this application connects the power detection module and the main control chip U2 to detect the power of the emergency power supply, thereby enabling timely detection of the current power status and ensuring that the power status of the emergency power supply meets the requirements.

[0022] Furthermore, the power display module includes resistors R10, R11, R12, and R13, as well as LEDs LED1, LED2, LED3, and LED4 of different colors.

[0023] The power output terminals of the power supply module are connected to the input terminals of LED1, LED2, LED3, and LED4 respectively via resistor R13, resistor R12, resistor R11, and resistor R10. The output terminals of LED1, LED2, LED3, and LED4 are connected to the power display control pin of the main control chip U2.

[0024] By adopting the above technical solution, this application uses LED1, LED2, LED3 and LED4 of different colors in the power display module to display the current power status detected by the power detection module and the main control chip U2, so that users can know the current power status in time and improve the convenience of use.

[0025] Furthermore, the main control chip U2's power display control pins include a first power display control pin for outputting a power display control signal indicating that the current power level is 0%, a second power display control pin for outputting a power display control signal indicating that the current power level is greater than 0% and less than 50%, a third power display control pin for outputting a power display control signal indicating that the current power level is greater than 50% and less than 100%, and a fourth power display control pin for outputting a power display control signal indicating that the current power level is 100%.

[0026] The output terminal of LED1 is connected to the first power display control pin, the output terminal of LED2 is connected to the second power display control pin, the output terminal of LED3 is connected to the third power display control pin, and the output terminal of LED4 is connected to the fourth power display control pin.

[0027] By adopting the above technical solution, this application controls the power display module to display the current power status through the main control chip U2. When the current power is 0%, the main control chip U2 controls the light-emitting diode LED1 to conduct; when the current power is 0-50%, the main control chip U2 controls the light-emitting diode LED2 to conduct; when the current power is 50%-100%, the main control chip U2 controls the light-emitting diode LED3 to conduct; and when the current power is 100%, the main control chip U2 controls the light-emitting diode LED4 to conduct. This allows users to obtain the current power status in a timely manner, thereby determining whether the emergency power supply needs to be charged to ensure timely use in case of emergencies and improving the convenience of use.

[0028] Furthermore, it also includes a power detection switch, which is connected to the main control chip U2 and is used to control the start or stop of power detection.

[0029] By adopting the above technical solution, this application controls the start or stop of power detection by setting a power detection switch. When it is necessary to obtain the current power status, pressing the power detection switch will start the power detection module and the power display module, and LED1, LED2, LED3 and LED4 will display the current power status. Pressing the power detection switch again will stop the power detection module and the power display module, and LED1, LED2, LED3 and LED4 will stop emitting light, so that users can obtain the current power status at any time and improve the convenience of use.

[0030] Furthermore, it also includes a USB control module, wherein the input end of the USB control module is connected to a USB interface and the output end of the USB control module is connected to a first output socket;

[0031] The USB control module includes a USB buck chip U3 and its peripheral circuitry.

[0032] By adopting the above technical solution, this application sets up a USB control module to step down the high voltage connected to the USB interface, thereby providing power output to the first output socket and ensuring the reliability of the emergency power supply.

[0033] Furthermore, the input terminal of the first output socket also includes a positive / negative indicator module, one end of which is connected to the first socket and the other end of which is connected to the USB control module;

[0034] The positive / negative indicator module is used to indicate when the live wire and neutral wire of the first output socket are reversed.

[0035] By adopting the above technical solution, this application uses a positive / negative indicator module to indicate when the live wire and neutral wire of the first output socket are reversed, prompting the user to make timely adjustments and further ensuring ease of use.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. This application uses a charging detection module and a main control chip U2 to detect the current charging status of the emergency power supply, and displays the current charging status of the emergency power supply through a charging display module, so that the charging status can be viewed at any time during the charging process;

[0038] 2. This application uses a power detection module and a main control chip U2 to detect the current power status of the emergency power supply, and displays the current power status of the emergency power supply through a power display module. This allows the current power status of the emergency power supply to be obtained at any time, so as to charge the emergency power supply in a timely manner, ensuring that it can be put into use in an emergency and improving the ease of use.

[0039] 3. This application uses a dual-color LED5 in the charging display module to display the current charging status detected by the charging detection module and the main control chip U2. When the charging status is charging, the main control chip U2 controls the first LED to turn on. When the charging status is fully charged, the main control chip U2 controls the second LED to turn on, so that the user can promptly obtain whether the current charging status is charging or fully charged, thus improving the convenience of use.

[0040] 4. This application uses the main control chip U2 to control the power display module to display the current power status. When the current power is 0%, the main control chip U2 controls LED1 to turn on; when the current power is 0-50%, the main control chip U2 controls LED2 to turn on; when the current power is 50%-100%, the main control chip U2 controls LED3 to turn on; and when the current power is 100%, the main control chip U2 controls LED4 to turn on. This allows users to obtain the current power status in a timely manner, thereby determining whether the emergency power supply needs to be charged to ensure timely use in emergencies and improving ease of use. Attached Figure Description

[0041] Figure 1 This is a system connection diagram according to an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the overall system circuit according to an embodiment of this application;

[0043] Figure 3 This is a circuit schematic diagram of the power module and power supply module according to an embodiment of this application;

[0044] Figure 4 This is a circuit schematic diagram of the charging detection module, charging display module, power detection module, power display module and main control chip U2 according to an embodiment of this application;

[0045] Figure 5 This is a circuit schematic diagram of the USB control module and forward / reverse indicator module according to an embodiment of this application;

[0046] In the diagram, 1 is the power module; 2 is the power supply module; 3 is the charging detection module; 4 is the charging display module; 5 is the power detection module; 6 is the power display module; 7 is the USB control module; and 8 is the forward / reverse indicator module. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0048] The primary function of an emergency power supply is to provide emergency power in the event of a power failure or outage, ensuring the safe operation of critical facilities and equipment and preventing significant losses and hazards. Therefore, it is necessary to constantly monitor the current power level of the emergency power supply and promptly recharge any low-powered units to ensure that it can be readily deployed in the event of a power outage. This application provides an emergency power supply control circuit, referring to… Figure 1 and Figure 2 It includes a power supply module 1, a power supply module 2, a charging detection module 3, a charging display module 4, a power detection module 5, a power display module 6, a USB control module 7, a forward / reverse indicator module 8, a main control chip U2, and several output sockets. In the specific implementation, the main control chip U2 is a single-chip microcontroller of model GA8P-SOP16.

[0049] The implementation principle of this application embodiment is as follows: the charging detection module 3 and the main control chip U2 work together to detect the current charging status of the emergency power supply, and the charging display module 4 displays the current charging status of the emergency power supply, so that the charging status can be viewed at any time during the charging process. At the same time, the power detection module 5 and the main control chip U2 work together to detect the current power status of the emergency power supply, and the power display module 6 displays the current power status of the emergency power supply, so that the current power status of the emergency power supply can be obtained at any time, so as to charge the emergency power supply in a timely manner, ensuring that it can be put into use in an emergency and improving the convenience of use.

[0050] like Figure 2 and Figure 3 As shown, in this embodiment, the power module 1 connects to an external charging power supply via a DC1 interface to charge the emergency power supply's battery. The external charging power supply in the power module 1 directly outputs 15V, while the emergency power supply's battery output is B+. The 15V charging output is connected to the input of the charging detection module 3, and the battery output B+ is connected to the input of the power supply module 2, the power detection module 5, and several output sockets. Since the emergency power supply needs to power multiple devices, different sockets are provided to adapt to different devices. Therefore, the sockets include socket CN2, socket CN3, socket CN4, socket CN6, and socket CN5. The inputs of sockets CN2, CN3, CN4, CN6, and CN5 are connected to the battery output B+, thereby providing power through the emergency power supply's battery. A self-resetting fuse F1 is also provided to ensure the socket's safety.

[0051] like Figure 2 and Figure 3 As shown, the power supply module 2 in this embodiment of the application includes a voltage regulator chip U1, a diode D2, a resistor R20, an electrolytic capacitor EC3, an electrolytic capacitor EC4, and a capacitor C9. The voltage regulator chip U1 includes a voltage regulator input pin and a voltage regulator output pin. In specific implementation, the voltage regulator chip U1 uses a three-terminal voltage regulator chip HT7350 SOT-89. The battery output terminal B+ of the power supply module 1 is connected to the voltage regulator input pin through diode D2 and resistor R20. The voltage regulator input pin vin is grounded through electrolytic capacitor EC3. The voltage regulator output pin vout is the power supply output terminal VDD, which is connected to the power supply pin of the main control chip U2. The voltage regulator output pin vout is grounded through the parallel electrolytic capacitor EC4 and capacitor C9. The grounding pin gnd is grounded.

[0052] like Figure 2 and Figure 4 As shown, the charging detection module 3 in this embodiment includes resistors R14 and R15 and transistor Q1. The 15V charging output terminal of power module 1 is connected to the base of transistor Q1 through resistor R14. Resistor R14 is grounded through resistor R15. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected to the charging detection pin XOUT / P0.2 of the main control chip U2.

[0053] like Figure 2 and Figure 4 As shown, the charging display module 4 in this embodiment includes resistors R18 and R19, and a dual-color LED 5. The dual-color LED 5 includes a first LED and a second LED of different colors. The charging display output pins of the main control chip U2 include a first charging display output pin P0.0 / INT0 / T0CKI for outputting a charging signal and a second charging display output pin P4.7 / AN7 for outputting a fully charged signal. The first charging display output pin P0.0 / INT0 / T0CKI is connected to the input terminal of the first LED through resistor R18, and the second charging display output pin P4.7 / AN7 is connected to the input terminal of the second LED through resistor R19. The output terminals of the first and second LEDs are grounded.

[0054] In the specific implementation, the first light-emitting diode is a red LED, and the second light-emitting diode is a green LED. When the main control chip U2 detects that the current charging status is "charging" through the charging detection module 3, it outputs a charging display signal indicating that it is charging through the first charging display output pin P0.0 / INT0 / T0CKI, controlling the red LED to emit light. When the main control chip U2 detects that the current charging status is "fully charged" through the charging detection module 3, it outputs a fully charged charging display signal through the second charging display output pin P4.7 / AN7, controlling the green LED to emit light.

[0055] like Figure 2 and Figure 4 As shown, the power detection module 5 in this embodiment includes resistor R16, resistor R17, and capacitor C8. The battery output terminal B+ of the power module 1 is connected to the power detection pin P4.4 / AN4 / PGC of the main control chip U2 through resistor R17, and resistor R17 is grounded through the parallel resistor R16 and capacitor C8.

[0056] like Figure 2 and Figure 4 As shown, the power display module 6 implemented in this application includes resistors R10, R11, R12, and R13, as well as LEDs LED1, LED2, LED3, and LED4 of different colors. The power display control pins of the main control chip U2 include a first power display control pin P4.3 / AN3 for outputting a power display control signal indicating a current power level of 0%, a second power display control pin P4.2 / AN2 for outputting a power display control signal indicating a current power level greater than 0% and less than 50%, a third power display control pin P4.1 / AN1 / PGD for outputting a power display control signal indicating a current power level greater than 50% and less than 100%, and a fourth power display control pin P0.0 / AN0 / VREF / PCK for outputting a power display control signal indicating a current power level of 100%. The power output terminal VDD of power supply module 2 is connected to the input terminal of LED1 via resistor R13, the input terminal of LED2 via resistor R12, the input terminal of LED3 via resistor R11, and the input terminal of LED4 via resistor R10. The output terminal of LED1 is connected to the first power display control pin P4.3 / AN3, the output terminal of LED2 is connected to the second power display control pin P4.2 / AN2, the output terminal of LED3 is connected to the third power display control pin P4.1 / AN1 / PGD, and the output terminal of LED4 is connected to the fourth power display control pin P0.0 / AN0 / VREF / PCK.

[0057] In the specific implementation, LED1 is a red LED, LED2 is a yellow LED, LED3 is a blue LED, and LED4 is a green LED. When the main control chip U2 obtains the current battery level as 0% through the battery detection module 5, it controls the red LED to light up through the first battery level display control pin P4.3 / AN3; when the main control chip U2 obtains the current battery level as greater than 0% and less than 50% through the battery detection module 5, it controls the yellow LED to light up through the second battery level display control pin P4.2 / AN2; when the main control chip U2 obtains the current battery level as greater than 50% and less than 100% through the battery detection module 5, it controls the blue LED to light up through the third battery level display control pin P4.1 / AN1 / PGD; and when the main control chip U2 obtains the current battery level as 100% through the battery detection module 5, it controls the green LED to light up through the fourth battery level display control pin P0.0 / AN0 / VREF / PCK.

[0058] like Figure 2 and Figure 4 As shown, it also includes a power detection switch SW1, which is connected to the power detection switch pin XIN / P0.3 of the main control chip U2. The power detection switch SW1 is used to control the start or stop of power detection. In specific implementation, the power detection switch SW1 can be a 7*7 unlocked 6-pin push-button switch. When it is necessary to obtain the current power status, press the power detection switch SW1, and the power detection module 5 and the power display module 6 will start working. LED1, LED2, LED3, and LED4 will display the current power status. Press the power detection switch SW1 again, and the power detection module 5 and the power display module 6 will stop working, and LED1, LED2, LED3, and LED4 will all stop illuminating.

[0059] like Figure 2 and Figure 5 As shown, in this embodiment, the input terminal of the USB control module 7 is connected to USB interfaces USB1 and USB2, and the output terminal of the USB control module 7 is connected to the first output socket CN1. The USB control module 7 includes a USB step-down chip U3 and its peripheral circuitry. In specific implementation, the USB step-down chip U3 is model NS6328. The voltage input from USB interfaces USB1 and USB2 is stepped down by the USB step-down chip U3 before being output to the first output socket CN1.

[0060] like Figure 2 and Figure 5As shown, in this embodiment of the application, the positive / negative indicator module 8 is connected at one end to the first socket CN1 and at the other end to the USB control module 7. The positive / negative indicator module 8 is used to indicate when the live wire and neutral wire of the first output socket CN1 are reversed. The positive / negative indicator module 8 includes diode D3, diode D4, resistor R5, resistor R21, resistor R22, light-emitting diode LED6, and buzzer BZ1. The negative terminal of buzzer BZ1 is connected to the first output socket CN1 and to the USB control module 7 through resistors R21, R22, and diode D4. The positive terminal is grounded through resistor R5 and diode D3. The input terminal of light-emitting diode LED6 is grounded, and the output terminal is connected to the USB control module 7 through resistor R22 and diode D4.

[0061] In practice, LED6 is a dual-color, stepless, misty green and red LED. If the USB control module 7 detects that the live wire and neutral wire of the first output socket CN1 are reversed, it controls the LED6 of the forward / reverse indicator module 8 to light up and controls the buzzer BZ1 to sound an alarm.

[0062] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An emergency power supply control circuit, characterized in that: It comprises a power module (1), a power supply module (2), a charging detection module (3), a charging display module (4), a power detection module (5), a power display module (6), a main control chip U2 and a plurality of output sockets, wherein the output end of the power supply module (1) comprises a charging output end and a battery output end, the charging output end is connected to the input end of the charging detection module (3), and the battery output end is respectively connected to the input end of the power supply module (2), the input end of the power detection module (5) and the input ends of a plurality of output sockets; The main control chip U2 comprises a power supply pin, a charging detection pin and a power detection pin, the output end of the power supply module (2) is connected, the output end of the charging detection module (3) is connected to the charging detection pin of the main control chip U2, and the output end of the power detection module (5) is connected to the power detection pin of the main control chip U2; The main control chip U2 further comprises a charging display control pin and a power display control pin, wherein the charging display control pin is connected to the input end of the charging display module (4), and the power display control pin is connected to the input end of the power display module (6); The power detection module (5) comprises a resistor R16, a resistor R17 and a capacitor C8; the battery output end of the power module (1) is connected to the power detection pin of the main control chip U2 via the resistor R17, and the resistor R17 is grounded via the resistor R16 and the capacitor C8 connected in parallel; The power display module (6) comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, and light emitting diodes LED1, LED2, LED3, and LED4 of different colors; The power supply output end of the power supply module (2) is respectively connected to the input end of the light emitting diode LED1 through a resistor R13, connected to the input end of the light emitting diode LED2 through a resistor R12, connected to the input end of the light emitting diode LED3 through a resistor R11, and connected to the input end of the light emitting diode LED4 through a resistor R10, and the output ends of the light emitting diode LED1, the light emitting diode LED2, the light emitting diode LED3, and the light emitting diode LED4 are connected to the power display control pin of the main control chip U2; The power display control pins of the main control chip U2 include a first power display control pin for outputting a power display control signal when the current power is 0%, a second power display control pin for outputting a power display control signal when the current power is greater than 0% and less than 50%, a third power display control pin for outputting a power display control signal when the current power is greater than 50% and less than 100%, and a fourth power display control pin for outputting a power display control signal when the current power is 100%; The output end of the light emitting diode LED1 is connected to the first power display control pin, the output end of the light emitting diode LED2 is connected to the second power display control pin, the output end of the light emitting diode LED3 is connected to the third power display control pin, and the output end of the light emitting diode LED4 is connected to the fourth power display control pin.

2. An emergency power supply control circuit according to claim 1, characterized in that: The power supply module (2) comprises a voltage stabilizing chip U1, a diode D2, a resistor R20, an electrolytic capacitor EC3, an electrolytic capacitor EC4 and a capacitor C9, and the voltage stabilizing chip U1 comprises a voltage stabilizing input pin and a voltage stabilizing output pin; The battery output end of the power module (1) is connected to the voltage stabilization input pin via a diode D2 and a resistor R20, the voltage stabilization input pin is grounded via an electrolytic capacitor EC3, the voltage stabilization output pin is a power supply output end, the power supply output end is connected to the power supply pin of the main control chip U2, and the voltage stabilization output pin is grounded via a parallel electrolytic capacitor EC4 and a capacitor C9.

3. An emergency power supply control circuit according to claim 1, characterized in that: The charging detection module (3) comprises a resistor R14, a resistor R15 and a transistor Q1; The charging output end of the power module (1) is connected to the base of the transistor Q1 via a resistor R14, the resistor R14 is grounded via a resistor R15, the emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is connected to the charging detection pin of the main control chip U2.

4. An emergency power supply control circuit according to claim 3, characterized in that: The charging display module (4) comprises a resistor R18, a resistor R19 and a two-color light emitting diode LED5, wherein the two-color light emitting diode LED5 comprises a first light emitting diode and a second light emitting diode of different colors; The charging display output pin of the main control chip U2 includes a first charging display output pin for outputting a charging signal and a second charging display output pin for outputting a fully charged signal. The first charging display output pin is connected to the first light-emitting diode input end through a resistor R18, and the second charging display output pin is connected to the second light-emitting diode input end through a resistor R19. The first light-emitting diode and the second light-emitting diode output ends are grounded.

5. An emergency power supply control circuit according to claim 1, characterized in that: It also includes a power detection switch, which is connected to the main control chip U2 and is used to control the start or stop of power detection.

6. An emergency power supply control circuit according to any one of claims 1 to 5, characterized in that: It also comprises a USB control module (7), wherein the input end of the USB control module (7) is connected to the USB interface and the output end of the USB control module (7) is connected to the first output socket; The USB control module (7) comprises a USB voltage reduction chip U3 and its peripheral circuits.

7. An emergency power supply control circuit according to claim 6, characterized in that: The first output socket input end also includes a positive and negative indication module (8), one end of the positive and negative indication module (8) is connected to the first socket, and the other end is connected to the USB control module (7); The positive and negative indication module (8) is used to indicate when the live wire and the neutral wire of the first output socket are connected reversely.

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