Portable communication power supply system

Abstract

The utility model provides a portable communication power supply system. The portable communication power supply system comprises a storage battery, a discharge management module, a boost module, an inversion module and a step-down module, the storage battery is connected with the input end of the discharge management module, the output end of the discharge management module is connected with the input end of the boost module, and the output end of the boost module is connected with the inverter module and the step-down module. The inversion module is used for outputting alternating current; the voltage reduction module is used for outputting direct current; the boosting module comprises a boosting circuit and a switching circuit; the first end of the switching circuit serves as the input end of the boost module, the second end of the switching circuit is connected with the power supply end of the boost circuit, the output end of the boost circuit serves as the second end of the boost module, and the sampling end of the boost circuit is connected with the feedback end of the boost circuit through the voltage sampling circuit. The problem that the power supply output by the portable communication power supply system is unstable can be solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of communication power supply, and in particular to a portable communication power supply system. Background Art

[0002] Portable communication power system is a portable power system, mainly used to provide stable power supply for various portable devices such as mobile phones, laptops, tablets, etc. This system is usually small, light, easy to carry, and can adapt to different environmental conditions, such as outdoor activities, emergencies or use without fixed power supply.

[0003] However, although portable communication power systems are designed to provide reliable power support, in actual applications, instability of the output power often occurs. This instability may manifest as voltage fluctuations, frequency deviations, or current interruptions, which may damage the connected devices or affect their normal operation. Utility Model Content

[0004] The disclosed embodiment provides a portable communication power supply system to solve the problem that the power output by the portable communication power supply system is unstable.

[0005] In a first aspect, an embodiment of the present disclosure provides a portable communication power supply system, including a storage battery, a discharge management module, a boost module, an inverter module and a buck module;

[0006] The storage battery is connected to the input end of the discharge management module, the output end of the discharge management module is connected to the input end of the boost module, and the output end of the boost module is respectively connected to the inverter module and the buck module;

[0007] The inverter module is used to output alternating current, and the step-down module is used to output direct current;

[0008] The boost module includes a boost circuit and a switch circuit;

[0009] The first end of the switch circuit serves as the input end of the boost module, the second end of the switch circuit is connected to the power supply end of the boost circuit, the output end of the boost circuit serves as the second end of the boost module, and the sampling end of the boost circuit is connected to the feedback end of the boost circuit through a voltage sampling circuit.

[0010] In an exemplary embodiment of the present disclosure, a solar panel and a charging management module are also included;

[0011] The solar panel is used to convert solar energy into electrical energy. The solar panel is connected to the first input end of the charging management module. The second input end of the charging management module is used to connect to the mains. The output end of the charging management module is connected to the positive pole of the battery, and the negative pole of the battery is grounded.

[0012] In an exemplary embodiment of the present disclosure, the boost module includes a driver U1, a switch K1, an inductor L1, a switch tube Q1, a resistor R1, a capacitor C1, a switch tube Q3, a switch tube Q2 and a resistor R6;

[0013] The first end of the switch K1 is connected to the output end of the discharge management module, the second end of the switch K1 is connected to the power supply end of the driver U1, the output end of the driver U1 is connected to the control end of the switch tube Q1, the first end of the inductor L1 is connected to the output end of the discharge management module, the second end of the inductor L1 is connected to the first end of the switch tube Q1, the second end of the switch tube Q1 is grounded through the resistor R1, the second end of the switch tube Q1 is connected to the detection end of the driver U1, and the second end of the inductor L1 is grounded through the capacitor C1;

[0014] The second end of the inductor L1 is connected to the first end of the switch tube Q3, the second end of the switch tube Q3 serves as the output end of the boost module, the control end of the switch tube Q3 is connected to the first end of the switch tube Q2, the second end of the switch tube Q2 is grounded through the resistor R6, the control end of the switch tube Q2 is connected to the second end of the switch K1, and the second end of the switch tube Q2 is connected to the feedback end of the driver U1 through the voltage sampling circuit.

[0015] In an exemplary embodiment of the present disclosure, the voltage sampling circuit includes a variable resistor RP1, an amplifier U4, a resistor R8 and a resistor R13;

[0016] The first end of the variable resistor RP1 is connected to the second end of the switch tube Q2, the second end of the variable resistor RP1 is grounded, the sliding end of the variable resistor RP1 is connected to the non-inverting input end of the amplifier U4, the inverting input end of the amplifier U4 is grounded through the resistor R13, the output end of the amplifier U4 is connected to the inverting input end of the amplifier U4 through the resistor R8, and the output end of the amplifier U4 is connected to the feedback end of the driver U1.

[0017] In an exemplary embodiment of the present disclosure, the voltage reduction module includes a resistor R10 and a resistor R11;

[0018] The first end of the resistor R10 is connected to the output end of the boost module, the second end of the resistor R10 is grounded through the resistor R11, and the second end of the resistor R10 is used to output a DC power supply.

[0019] In an exemplary embodiment of the present disclosure, the voltage reduction module further includes a capacitor C6, a resistor R9 and a switch tube Q4;

[0020] The second end of the resistor R10 is used to connect the positive electrode of the DC load, the first end of the switch tube Q4 is used to connect the negative electrode of the DC load, the first end of the switch tube Q4 is grounded through the capacitor C6, the first end of the switch tube Q4 is connected to the control end of the switch tube Q4 through the resistor R9, and the second end of the switch tube Q4 is grounded.

[0021] In an exemplary embodiment of the present disclosure, it also includes a power detection module and a display module;

[0022] The power detection module is connected to the battery, and the power detection module is connected to the display module, and the display module is used to display the remaining power of the battery.

[0023] The embodiments of the present disclosure provide a portable communication power system with the following beneficial effects: it provides flexible AC / DC output options, and also has efficient power conversion, intelligent battery management and voltage stabilization functions. Through the combination of boost circuits, switching circuits and voltage sampling circuits, it ensures reliable and stable power support for communication equipment in various environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 is a structural schematic diagram of a portable communication power supply system provided by an embodiment of the present disclosure;

[0026] Figure 2 is a circuit diagram of a boost module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0028] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0029] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a portable communication power supply system provided by an embodiment of the present disclosure. Figure 1 , the portable communication power supply system includes a storage battery, a discharge management module, a boost module, an inverter module and a buck module;

[0031] The storage battery is connected to the input end of the discharge management module, the output end of the discharge management module is connected to the input end of the boost module, and the output end of the boost module is connected to the inverter module and the buck module respectively;

[0032] The inverter module is used to output AC power, and the step-down module is used to output DC power;

[0033] The boost module includes a boost circuit and a switch circuit;

[0034] The first end of the switch circuit serves as the input end of the boost module, the second end of the switch circuit is connected to the power supply end of the boost circuit, the output end of the boost circuit serves as the second end of the boost module, and the sampling end of the boost circuit is connected to the feedback end of the boost circuit through the voltage sampling circuit.

[0035] The portable communication power system is an integrated portable power solution designed to meet the power supply needs of communication equipment in conditions where there is no fixed power supply or the power supply environment is unstable.

[0036] In this embodiment, the portable communication power supply system is composed of a battery, a discharge management module, a boost module, an inverter module and a buck module. The battery stores electrical energy and provides controlled direct current to the boost module through the discharge management module. The switch circuit in the boost module converts the input direct current into high-frequency pulses, and the boost circuit increases the voltage on this basis, and the voltage stabilizing circuit ensures the stability of the output voltage. The output of the boost module is divided into two paths: one path is sent to the inverter module to convert it into alternating current for use by equipment that requires alternating current (such as lighting lamps, etc.); the other path is sent to the buck module to reduce it to a voltage level suitable for DC loads to power DC loads (such as mobile phones, computers, etc.). The entire system ensures efficient and stable power supply under different load requirements and battery conditions through intelligent management, while protecting the battery from damage and extending its service life.

[0037] In this embodiment, the branch power provided by the battery is small, and the battery voltage needs to be boosted before the corresponding AC power is output through the inverter module. If the output of the battery is directly connected to the inverter module, the inverted AC power cannot meet the power demand of the AC equipment.

[0038] In order to meet the needs of electrical equipment, the DC voltage output by the battery needs to be boosted. The boost module includes a boost circuit, a switching circuit and a voltage stabilizing circuit. Its main task is to boost the lower voltage DC power output by the discharge management module to a higher voltage that meets the working requirements of the equipment.

[0039] When working, it is necessary to turn on the switch circuit. The switch circuit mainly provides working power for the boost circuit. The boost circuit is used to boost the DC output of the battery to a higher DC voltage. In this embodiment, the boost circuit can use energy storage elements such as inductors and capacitors to store and release energy during the opening and closing process of the switch device to boost the input low-voltage pulse to a higher DC voltage. In order to ensure the stability of the output voltage of the portable communication power supply system, this embodiment also adds a voltage sampling circuit to feedback the sampled voltage. The boost circuit can adjust the output voltage according to the sampled voltage, thereby ensuring that the output voltage of the boost circuit is stable and unchanged, and then ensuring that the AC voltage and DC voltage after the inverter module and the step-down module are stable and unchanged, ensuring the stability of the output voltage of the portable communication power supply system.

[0040] The inverter module receives the DC power provided by the boost module and converts it into 220V AC output for communication equipment that requires AC power. The buck module also receives the DC power from the boost module, but its function is to reduce the voltage to a lower voltage suitable for specific DC loads, which is suitable for communication equipment or accessories that require a lower DC voltage.

[0041] In this embodiment, the portable communication power supply system not only provides flexible AC / DC output options, but also has efficient power conversion, intelligent battery management and voltage stabilization functions. Through the combination of boost circuit, switching circuit and voltage sampling circuit, it ensures reliable and stable power support for communication equipment in various environments.

[0042] like Figure 1 As shown, the portable communication power supply system in this embodiment also includes a solar panel and a charging management module; the solar panel is used to convert solar energy into electrical energy, the solar panel is connected to the first input end of the charging management module, the second input end of the charging management module is used to connect to the mains, the output end of the charging management module is connected to the positive pole of the battery, and the negative pole of the battery is grounded.

[0043] The portable communication power supply system in this embodiment can charge the battery directly through the mains so that it can be used in remote areas or scenarios without mains access. As the power in the battery is continuously consumed, if the battery is not charged in time, the portable communication power supply system will not be able to be used normally. In order to achieve the effective utilization of solar energy, a green energy source, and enhance the energy self-sufficiency and endurance of the system, especially in remote areas or scenarios without mains access, it can more effectively ensure the continuous and stable power supply of communication equipment. The portable communication power supply system in this embodiment also integrates solar panels and charging management modules.

[0044] When used in remote areas or without mains access, under sufficient sunlight, the solar panel converts solar energy into electrical energy and transmits it to the first input terminal of the charging management module through the connecting line. The charging management module recognizes the solar input and activates the corresponding charging strategy to optimally transfer the electrical energy generated by the solar panel to the battery for charging.

[0045] The battery is charged under the supervision of the charging management module. Whether the electricity comes from solar energy or the mains, it is regulated by the charging management module to ensure a safe and stable charging process and avoid damage to the battery. After the battery is fully charged, the charging management module will automatically switch to floating charge or trickle charge mode to maintain the battery power and prevent overcharging. When it is necessary to power the electrical equipment, the charging management module stops charging the battery, and the discharge management module controls the discharge process of the battery according to the equipment requirements. At the same time, the boost module, inverter module and buck module provide AC or DC output as needed.

[0046] like Figure 2 As shown, in this embodiment, the boost module includes a driver U1, a switch K1, an inductor L1, a switch tube Q1, a resistor R1, a capacitor C1, a switch tube Q3, a switch tube Q2 and a resistor R6; the first end of the switch K1 is connected to the output end of the discharge management module, the second end of the switch K1 is connected to the power supply end of the driver U1, the output end of the driver U1 is connected to the control end of the switch tube Q1, the first end of the inductor L1 is connected to the output end of the discharge management module, the second end of the inductor L1 is connected to the first end of the switch tube Q1, the second end of the switch tube Q1 is grounded through the resistor R1, the second end of the switch tube Q1 is connected to the detection end of the driver U1, and the second end of the inductor L1 is grounded through the capacitor C1; the second end of the inductor L1 is connected to the first end of the switch tube Q3, the second end of the switch tube Q3 serves as the output end of the boost module, the control end of the switch tube Q3 is connected to the first end of the switch tube Q2, the second end of the switch tube Q2 is grounded through the resistor R6, the control end of the switch tube Q2 is connected to the second end of the switch K1, and the second end of the switch tube Q2 is connected to the feedback end of the driver U1 through the voltage sampling circuit.

[0047] In this embodiment, the switch K1 forms a switch circuit, and the driver U1, the inductor L1, the switch tube Q1, the resistor R1, the capacitor C1, the switch tube Q3, the switch tube Q2 and the resistor R6 form a boost circuit.

[0048] When the portable communication power supply system needs to supply power to the electrical equipment, the switch K1 needs to be pressed, and then the driver U1 is powered on, and then the control end of the switch tube Q2 becomes a high level, the switch tube Q2 is turned on, and the switch tube Q3 is also turned on.

[0049] After the driver U1 is powered on, the output end (GATE pin) of the driver U1 outputs a PWM control signal. When the PWM control signal is at a high level, the switch tube Q1 is turned on. At this time, the battery stores energy in the inductor L1. When the PWM control signal is at a low level, the switch tube Q2 is turned off. At this time, the electric energy in the battery and the inductor L1 is discharged at the same time. The voltage is output after passing through the switch tube Q3 and charges the capacitor C1 at the same time. When the PWM control signal turns to a high level, it can be discharged through the capacitor C1, thereby ensuring that the boost voltage continues to output a DC voltage signal.

[0050] In this embodiment, when the switch tube Q2 is turned on, the voltage output by the inductor L1 is divided by the resistors R12, R4 and R6 in sequence and reaches the bottom. If the voltage output by the boost circuit changes, the voltage on the resistor R6 will also change. The voltage change on the resistor R6 can be used to determine whether the voltage output by the boost circuit is stable. The stability of the voltage output by the boost circuit determines the stability of the output voltage of the portable communication power supply system.

[0051] Therefore, the voltage sampling circuit is used to collect the voltage on the resistor R6, and send the collected voltage to the feedback end (FB pin) of the driver U1. The processor U1 can change the duty cycle of the PWM control signal output by the processor U1 according to the voltage of the feedback end (FB pin). When the voltage on the resistor R6 increases, the duty cycle of the PWM control signal output by the processor U1 decreases, reducing the on-time of the switch tube Q1, thereby boosting the voltage output by the circuit. When the voltage on the resistor R6 decreases, the duty cycle of the PWM control signal output by the processor U1 increases, thereby increasing the on-time of the switch tube Q1, thereby reducing the voltage output by the circuit.

[0052] The boost module in this embodiment adopts a specific circuit structure, including components such as drivers, switches, inductors, switching tubes, resistors, capacitors, etc. Through the coordinated work of these components, the lower voltage DC power output by the discharge management module is boosted to a higher voltage that meets the working requirements of the equipment, and a stable voltage output is achieved through a feedback mechanism.

[0053] like Figure 2As shown, the voltage sampling circuit in this embodiment includes a variable resistor RP1, an amplifier U4, a resistor R8 and a resistor R13; the first end of the variable resistor RP1 is connected to the second end of the switch tube Q2, the second end of the variable resistor RP1 is grounded, the sliding end of the variable resistor RP1 is connected to the in-phase input end of the amplifier U4, the inverting input end of the amplifier U4 is grounded through the resistor R13, the output end of the amplifier U4 is connected to the inverting input end of the amplifier U4 through the resistor R8, and the output end of the amplifier U4 is connected to the feedback end of the driver U1.

[0054] In this embodiment, the voltage sampling circuit is connected between the second end of the switch tube Q2 and the feedback end of the driver U1, and is used to obtain a voltage signal from the output end of the boost module and feed it back to the driver U1 to achieve closed-loop control and maintain the stability of the output voltage.

[0055] Among them, amplifier U4 constitutes an amplifier circuit, which sends the amplified voltage signal to the feedback end of driver U1. Rheostat RP1 is used to obtain the voltage signal from the second end of switch tube Q2. By adjusting the sliding end position of rheostat RP1, the proportion of the sampling voltage can be changed to adapt to different feedback control requirements, thereby improving the flexibility and stability of the system. Resistor R7 and capacitor C5 constitute a low-pass filter circuit to ensure the stability of the voltage added to the feedback end of driver U1 and reduce the influence of interference signals on the voltage.

[0056] like Figure 2 As shown, the step-down module in this embodiment includes a resistor R10 and a resistor R11; the first end of the resistor R10 is connected to the output end of the boost module, the second end of the resistor R10 is grounded through the resistor R11, and the second end of the resistor R10 is used to output a DC power supply.

[0057] In this embodiment, the voltage reduction is achieved by the step-down module based on a simple resistor voltage division principle. When the current flows through the voltage division network composed of resistors R10 and R11, according to Ohm's law and the voltage division formula, the voltage at the output end of the step-down module (the second end of resistor R10) is equal to the output voltage of the step-up module multiplied by the ratio of the total resistance of resistor R11 to resistor R10. Among them, the voltage regulator D2 is used to stabilize the voltage, further ensuring that the output DC voltage is stable.

[0058] like Figure 2 As shown, the step-down module in this embodiment also includes a capacitor C6, a resistor R9 and a switch tube Q4; the second end of the resistor R10 is used to connect the positive electrode of the DC load, the first end of the switch tube Q4 is used to connect the negative electrode of the DC load, the first end of the switch tube Q4 is grounded through the capacitor C6, the first end of the switch tube Q4 is connected to the control end of the switch tube Q4 through the resistor R9, and the second end of the switch tube Q4 is grounded.

[0059] For some DC electrical equipment, the voltage they can withstand is relatively small, but some high-voltage pulses are easily generated at the moment the power is turned on, which can easily affect the performance of the electrical equipment in the long run. For this reason, capacitor C6, resistor R9 and switch tube Q4 form a buffer circuit.

[0060] Specifically, the working principle of the buffer circuit is as follows: when the DC power-consuming device uses electricity, the positive electrode of the DC power-consuming device is connected to the second end of the resistor R10, and the negative electrode of the DC power-consuming device is connected to the first end of the switch tube Q4. When the DC power-consuming device is connected to the DC power supply, a high-voltage pulse is generated, and the high-voltage pulse is applied to both ends of the capacitor C6. Since the voltage across the capacitor cannot change suddenly, the capacitor C6 is charged at the moment of power-on, and the switch tube Q4 is turned off. When the voltage across the capacitor C6 is greater than the turn-on voltage of the switch tube Q4, the switch tube Q4 is turned on, and the DC power-consuming device is officially powered on, thereby avoiding the influence of the high-voltage pulse on the power-consuming device, thereby improving the reliability of the portable communication power supply system.

[0061] Furthermore, the present embodiment also includes a power detection module and a display module; the power detection module is connected to the battery, and the power detection module is connected to the display module, and the display module is used to display the remaining power of the battery.

[0062] In this embodiment, a power detection module and a display module are added, which are responsible for detecting and displaying the remaining power of the battery.

[0063] The power detection module is used to detect the remaining power of the battery. The display module is connected to the power detection module to visually display the remaining power of the battery. The display module may include visual components such as LED indicators, LCD displays, and digital tubes to display information such as the percentage of battery power and remaining usage time (based on the current load) in the form of numbers, graphics, and bar graphs. The display module receives power data from the power detection module and converts it into a visual form that is easy for users to understand, so that users can understand the current status of the battery and make charging decisions or adjust power usage behaviors in a timely manner.

[0064] In this embodiment, the power detection module and the display module add battery status monitoring and visualization functions to the portable communication power system, improving the user-friendliness and power management efficiency of the system. Users can reasonably plan the use of equipment based on the real-time displayed power information to avoid premature battery exhaustion and communication interruption, which is also conducive to timely charging the battery and ensuring the continuous availability of the system.

[0065] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A portable communication power supply system, characterized in that: It includes a storage battery, a discharge management module, a boost module, an inverter module and a buck module; The storage battery is connected to the input end of the discharge management module, the output end of the discharge management module is connected to the input end of the boost module, and the output end of the boost module is respectively connected to the inverter module and the buck module; The inverter module is used to output alternating current, and the step-down module is used to output direct current; The boost module includes a boost circuit and a switch circuit; The first end of the switch circuit serves as the input end of the boost module, the second end of the switch circuit is connected to the power supply end of the boost circuit, the output end of the boost circuit serves as the second end of the boost module, and the sampling end of the boost circuit is connected to the feedback end of the boost circuit through a voltage sampling circuit.

2. The portable communication power supply system according to claim 1, characterized in that: It also includes solar panels and a charging management module; The solar panel is used to convert solar energy into electrical energy. The solar panel is connected to the first input end of the charging management module. The second input end of the charging management module is used to connect to the mains. The output end of the charging management module is connected to the positive pole of the battery, and the negative pole of the battery is grounded.

3. The portable communication power supply system according to claim 1, characterized in that: The boost module includes a driver U1, a switch K1, an inductor L1, a switch tube Q1, a resistor R1, a capacitor C1, a switch tube Q3, a switch tube Q2 and a resistor R6; The first end of the switch K1 is connected to the output end of the discharge management module, the second end of the switch K1 is connected to the power supply end of the driver U1, the output end of the driver U1 is connected to the control end of the switch tube Q1, the first end of the inductor L1 is connected to the output end of the discharge management module, the second end of the inductor L1 is connected to the first end of the switch tube Q1, the second end of the switch tube Q1 is grounded through the resistor R1, the second end of the switch tube Q1 is connected to the detection end of the driver U1, and the second end of the inductor L1 is grounded through the capacitor C1; The second end of the inductor L1 is connected to the first end of the switch tube Q3, the second end of the switch tube Q3 serves as the output end of the boost module, the control end of the switch tube Q3 is connected to the first end of the switch tube Q2, the second end of the switch tube Q2 is grounded through the resistor R6, the control end of the switch tube Q2 is connected to the second end of the switch K1, and the second end of the switch tube Q2 is connected to the feedback end of the driver U1 through the voltage sampling circuit.

4. The portable communication power supply system according to claim 3, characterized in that: The voltage sampling circuit includes a variable resistor RP1, an amplifier U4, a resistor R8 and a resistor R13; The first end of the variable resistor RP1 is connected to the second end of the switch tube Q2, the second end of the variable resistor RP1 is grounded, the sliding end of the variable resistor RP1 is connected to the non-inverting input end of the amplifier U4, the inverting input end of the amplifier U4 is grounded through the resistor R13, the output end of the amplifier U4 is connected to the inverting input end of the amplifier U4 through the resistor R8, and the output end of the amplifier U4 is connected to the feedback end of the driver U1.

5. The portable communication power supply system according to claim 1, characterized in that: The step-down module includes a resistor R10 and a resistor R11; The first end of the resistor R10 is connected to the output end of the boost module, the second end of the resistor R10 is grounded through the resistor R11, and the second end of the resistor R10 is used to output a DC power supply.

6. The portable communication power supply system according to claim 5, characterized in that: The step-down module also includes a capacitor C6, a resistor R9 and a switch tube Q4; The second end of the resistor R10 is used to connect the positive electrode of the DC load, the first end of the switch tube Q4 is used to connect the negative electrode of the DC load, the first end of the switch tube Q4 is grounded through the capacitor C6, the first end of the switch tube Q4 is connected to the control end of the switch tube Q4 through the resistor R9, and the second end of the switch tube Q4 is grounded.

7. The portable communication power supply system according to claim 1, characterized in that: It also includes a power detection module and a display module; The power detection module is connected to the battery, and the power detection module is connected to the display module, and the display module is used to display the remaining power of the battery.

Images