Outdoor mobile power supply device and working method thereof

Abstract

The invention discloses an outdoor mobile power supply device and a working method thereof, the outdoor mobile power supply device adopts a draw-bar box type structure and is provided with an anti-vibration and anti-drop shell and multi-port output, and a hardware system is arranged in the anti-vibration and anti-drop shell; the hardware system comprises a battery, a solar controller, an inverter, an AC switch, a DC switch, a common charger charging detection circuit, a solar panel charging detection circuit, a diode circuit 1-3, a battery voltage detection circuit, a DC switch circuit, a relay circuit, a high-power diode circuit, a power conversion circuit 1-3, a real-time clock circuit, a single-chip microcomputer control circuit and an AC switch circuit. The outdoor power utilization monitoring system is convenient to carry, flexible to use, diverse in charging mode, high in applicability and practicability, capable of giving an alarm quickly when the system breaks down, capable of ensuring basic power utilization specifications and safety of outdoor power utilization scenes, high in practicability and capable of being widely applied to the field of outdoor power utilization. And the waterproofness is high.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile power supplies, and in particular to a mobile power supply device for outdoor use and a working method thereof. Background Art

[0002] At present, the existing outdoor mobile power supply adopts a fixed box, which needs to be transported manually or moved by trailer, which is inconvenient and inconvenient for outdoor use; it uses an ordinary charger to charge it, and it needs to be manually carried indoors to plug in the charger for charging. If the charging conditions are not met, it will not be able to charge and use; the cooling fan usually uses a relatively large-power cooling fan, which is not an internal and external circulation wind, which is easy to heat up, and the heat dissipation effect of the device is poor, and there is a problem of easy crash, and the equipment is easily damaged by discharge; the internal circuit design of the device is not completely separated from the AC and DC, and the internal circuit has problems such as signal interference, unstable operation, and no distinction between power devices and signal devices; the internal battery of the device is mostly small-capacity batteries because of the size of the box. The internal battery capacity is low, the consumption is fast, and it needs to be charged frequently. When the charging frequency is frequent, the battery is easily damaged; the function is single, there is no sound alarm or over-temperature alarm, and when a fault occurs, the problem is not easy to troubleshoot. Therefore, it is urgent to develop a mobile power supply device for outdoor use and its working method to solve the above technical problems.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a mobile power supply device for outdoor use and a working method thereof, which is easy to carry, flexible to use, has various charging methods, strong applicability and practicality, can quickly alarm when a system failure occurs, can ensure basic power usage specifications and safety in outdoor power usage scenarios, has strong waterproofness, can adapt to severe weather, has broad application prospects, and is conducive to promotion and application.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a mobile power supply device for outdoor use, which adopts a trolley box structure, is provided with a shockproof and drop-proof shell and a multi-port output, and a hardware system is provided inside the shockproof and drop-proof shell, and the hardware system includes a battery, a solar controller, an inverter, an AC switch, a DC switch, a common charger charging detection circuit, a solar panel charging detection circuit, a diode circuit 1-3, a battery voltage detection circuit, a DC switch circuit, a relay circuit, a high-power diode circuit, a power conversion circuit 1-3, a real-time clock circuit, a single-chip microcomputer control circuit, an AC switch circuit, a temperature detection circuit, a buzzer alarm circuit, an LCD display circuit, a fan control circuit, a power module circuit 1-3, an inverter control circuit and an inverter, the access signal of the common charger charging detection circuit is CHA_CHK, the access signal of the solar panel charging detection circuit is SUN_CHK, the output signal of the battery is BAT+, and the diode circuits 1~3 are The output signal is BAT1, the output signal of the DC switch circuit is BAT1_COM, the output signal of the power conversion circuit 1 is 12V, the output signal of the power conversion circuit 2 is 5V, the output signal of the power conversion circuit 3 is 3.3V, the output signal of the battery voltage detection circuit is BAT_DET, the signal of the single-chip microcomputer to control the relay circuit is BAT_SW, the output signal of the relay circuit is BO+, the signal of the single-chip microcomputer to control the inverter operation is INV_SW, the signal of the single-chip microcomputer to control the fan rotation is FUN_SW, the signal of the single-chip microcomputer to control the buzzer alarm is BUZZER, the signal of the single-chip microcomputer to detect the temperature is DQ, the signal of the single-chip microcomputer to detect the AC switch is AC_DET, the signal of the single-chip microcomputer to detect whether the ordinary charger is connected is CHA, the signal of the single-chip microcomputer to detect whether the solar panel is connected is SUN, the single-chip microcomputer and the LCD display communicate through the serial port, and the single-chip microcomputer and the real-time clock circuit communicate through I2C; The ordinary charger charging detection circuit uses an optocoupler to design a detection circuit to realize the function of ordinary charger connection / unplugging detection; the solar panel charging detection circuit uses an optocoupler to design a detection circuit to realize the function of solar panel connection / unplugging detection; the diode circuit 1-3 uses the unidirectional conductivity of the diode to ensure that the voltage of the device is input from the battery or ordinary charger or solar panel; the battery voltage detection circuit uses a combination of triode and MOS tube to design a switch circuit to realize battery voltage detection. When the system is powered off, the battery has no output circuit to ensure the stability of the battery; the DC switch circuit includes a resistor, a capacitor, a diode, a triode, and a MOS tube to jointly design a switch circuit, through The DC switch controls the on and off of the system BAT1_COM; the relay circuit includes a relay, a diode, a MOS tube and a resistor, and the on and off state of the relay is controlled by the single-chip control signal, that is, the on and off state of the battery BAT+ and BO+ is controlled, and the power module circuit 1-3, the inverter, and the solar controller are controlled by whether there is voltage on BO+ to control whether there is input voltage, thereby controlling their working state; the high-power diode circuit uses the high power and unidirectional conductivity of the high-power diode to achieve unidirectional output from the ordinary charger power CHA_CHK to BO+, and the power conversion circuit 1-3 includes a power conversion chip 1-3 and peripheral resistors and capacitors, which are used to convert and output 12V, 5V, 3V, respectively. .3V voltage is used to power various control and detection circuits inside the device. The real-time clock circuit is composed of a real-time clock chip and a peripheral circuit crystal oscillator, a backup battery, a resistor, and a capacitor. The system working time and the battery charging and discharging time are determined based on this time information. The single-chip microcomputer control circuit is composed of a single-chip microcomputer chip and a peripheral minimum system circuit. It has the functions of detecting temperature, battery power, ordinary charger / solar panel access, AC switch status, etc. It has the functions of controlling the operation of relays, buzzers, fans, inverters, etc. It uses I2C communication to realize the real-time clock function and uses serial communication to control the LCD screen display and other functions; the AC switch circuit is used for the single-chip microcomputer to detect the closing signal AC_D of the AC switch ET, realizes the working state of the inverter circuit; the temperature detection circuit includes a temperature sensor and a pull-up resistor, which are used to realize the function of temperature detection inside the device; the buzzer alarm circuit: uses transistors, resistors, and capacitors to design a switch circuit, and realizes the alarm function of the buzzer through the control of the single-chip microcomputer; the LCD display circuit communicates with the single-chip microcomputer through a serial port to realize the display function of the LCD; the fan control circuit uses transistors, resistors, capacitors, and diodes to design a switch circuit, and realizes the function of the single-chip microcomputer to control the internal fan of the device to start / stop; the power module circuit 1-3 includes a power conversion module 1-3 and peripheral resistors, capacitors, and diodes, which are used to convert and output DC 12V 4.17A, 12V 1.25A, 5V 1.2A power supply is led out to the device housing through an aviation plug for easy external access; the inverter control circuit includes an optocoupler circuit and a 485 communication circuit. The single-chip microcomputer controls whether the inverter circuit works by controlling the INV_SW signal. Data information is transmitted between the single-chip microcomputer and the inverter through 485 communication.

[0006] Preferably, the external input elements of the mobile power device during use include solar panels and ordinary chargers, and the internal output includes AC220V 50HZ power supply, DC12V 4.17A power supply, DC12V 1.25A power supply and DC5V 1.2A power supply.

[0007] Preferably, four fans with large air volume and heat dissipation are installed on the outside of the fan box. The fans are arranged in a semi-hidden design and equipped with a protective net to ensure safety and reliability while achieving a beautiful appearance. The fans are arranged with two air inlets and two air outlets, which can smoothly export the heat generated by the internal electrical appliances when the power supply is in working state to ensure the normal operation of the equipment.

[0008] Preferably, the multi-port output includes a DC power output and an AC power 220V output, the DC power output uses a waterproof metal aviation socket, and the AC power 220V output uses a waterproof, explosion-proof and flame-retardant national standard five-hole socket.

[0009] Preferably, the LCD display functions include battery charging and discharging status display, battery remaining power display, common charger and solar panel access display, AC220V output voltage and frequency display, load access status display, load overpower working status alarm display and device internal temperature information display.

[0010] Preferably, the battery adopts a lithium-ion battery pack, and its specifications are: nominal capacity 120Ah, nominal voltage 25.9V, standard charge and discharge current 24A, and discharge end voltage 18.9V; the specifications of the solar panel are: power 100W, voltage 36V, and can be charged with 24V battery; the specifications of the solar controller are: working voltage 24V, and can be connected to a solar panel power of 600W; the specifications of the inverter are: input voltage range 20-30V, output AC voltage 220V, output frequency 50HZ, output waveform is a pure sine wave, rated power 1000W, peak power 2000W; the model of the ordinary diode is SS36; the model of the high-power diode is MBR6045PT; the specification of the DC switch is a DC24V self-locking switch with light; the specification of the AC switch is a DC3.3V self-resetting switch with light; the model of the relay is JD2912-1H-24VDC; the power conversion circuit 1 The source conversion chip is SE3837B; the power conversion chip of the power conversion circuit 2 is LM7805S / TR; the power conversion chip of the power conversion circuit 3 is SPX3819M5-L-3-3 / TR; the model of the real-time clock chip is DS1307Z+T&R; the model of the single-chip microcomputer is STM32F103VET6; the model of the buzzer is TMB12A03; the model of the temperature sensor in the temperature detection circuit is DS18B20; the model of the LCD screen is DMT48320C035_06W; the size of the fan is 50*50*10, the operating voltage is 12V, and the rated current is 0.1A; the power module model of the power module circuit 1 is FD50-24S12B3C; the power module model of the power module circuit 2 is TDK15-24S12; the power module model of the power module circuit 3 is URB2405S-6WR3.

[0011] The present invention provides a working method of a mobile power supply device for outdoor use, including a DC output process, an AC output process, a common charger / solar panel charging process, and a temperature alarm and fan rotation process, and the specific steps are: S1: The device is connected to the battery BAT and outputs BAT+; S2: The system detects whether the DC switch is pressed. If it is pressed, the system outputs BAT1_COM and the process continues to S3; if it is not pressed, the process continues to S10; S3: Power conversion circuit 1 outputs 12V, power conversion circuit 2 outputs 5V, and power conversion circuit 3 outputs 3.3V; S4: MCU system initialization, BAT_SW is configured to 1; S5: The relay circuit works and outputs BO+, entering the DC output process. The DC output process: the power module circuit 1 works to output DC12V 4.17A power, the power module circuit 2 works to output DC12V 1.25A power, and the power module circuit 3 works to output DC5V 1.2A power; S6: The system detects whether the AC switch is pressed. If it is pressed, it enters the AC output process. The AC output process: the detection signal ACC_DET=1, the microcontroller output INV_SW=1, the inverter circuit works, and the device outputs AC220V 50HZ power; if it is not pressed, the device has no AC output; S7: The system MCU detects whether BAT_DET is 0. When the battery voltage is greater than 20V, BAT_DET=1, and the system continues to S4; when the battery power is less than 20V, BAT_DET=0, and enters the ordinary charger / solar panel charging process. The ordinary charger / solar panel charging process includes the ordinary charger process and the solar panel charging process. Ordinary charger process: The system MCU detects whether CHA is 1. When the ordinary charger is connected, CHA=1, and the LCD shows that the ordinary charger is charging. When the MCU detects BAT_DET=1, the LCD shows that it is fully charged, and prompts to unplug the charger; when the ordinary charger is not connected, CHA=0, and the system enters S9 and S10. Solar panel charging process: The system MCU detects whether SUN is 1. When the solar panel is connected, SUN=1, and the LCD shows that the solar panel is charging. When the MCU detects BAT_DET=1, the LCD shows that it is fully charged, and prompts to unplug the solar panel; when the solar panel is not connected, SUN=0, and the system enters S9 and S10; S8: During normal operation of the device, the temperature alarm and fan rotation process is entered every 10S. Temperature alarm and fan rotation process: When the temperature inside the device is greater than 45°, the MCU detection pin DQ=1, the MCU outputs FUN_SW=1 and BUZZER=1, the internal buzzer of the device alarms, and the fan starts to rotate to dissipate heat until the temperature inside the device is lower than 45°; when the temperature inside the device is ≤45°, the MCU detection pin DQ=0, the MCU outputs FUN_SW=0 and BUZZER=0, the internal buzzer of the device does not alarm, the fan does not rotate, and the system continues to S4; S9: MCU output BAT_SW=0; S10: The system does not work and all processes end.

[0012] The present invention provides a mobile power supply device for outdoor use and a working method thereof, which have the following beneficial effects.

[0013] 1. The present invention can output both DC and AC, and can be connected to both DC and AC devices externally, with strong applicability and practicality. The present invention supports both ordinary charger charging and solar panel charging, and has a variety of charging methods, which is convenient for users to flexibly choose according to their needs.

[0014] 2. The internal hardware circuit of the present invention is designed according to the functional division. When the system fails, it can quickly alarm, and the maintenance personnel can quickly locate the problem, which is convenient for designers to debug and test the hardware, and convenient for the maintenance personnel to quickly locate and solve the problem. The present invention is equipped with temperature alarm and buzzer alarm functions, which can remind users in time and can also automatically cut off the power to protect the equipment.

[0015] 3. The box body of the present invention adopts an integrated trolley case design, and the interface uses a waterproof aviation plug, which has strong integrity, is easy to carry, flexible to use, has strong waterproofness, and can adapt to severe weather.

[0016] 4. The outer side of the box of the present invention is equipped with four fans for heat dissipation with large air volume. The fans are arranged in a semi-hidden design and equipped with a protective net. The fans are arranged in a two-inlet and two-outlet manner. The appearance is beautiful and the heat generated by the internal electrical appliances when the power supply is in working state can be smoothly discharged to ensure the normal operation of the equipment.

[0017] 5. The internal hardware circuit of the present invention adopts a modular design, and the single-chip control circuit and the power conversion output interface circuit are separated by independent design, and the power components and signal devices are placed separately, so that the circuit runs stably, safely and reliably.

[0018] 6. The present invention supports two charging modes: ordinary charger charging and solar panel charging. It has LCD screen display function and buzzer alarm function, and can stably output AC power 220V 50HZ and DC power 12V 4.17A, 12V 1.25A, 5V 1.2A.

[0019] 7. The present invention can be applied to outdoor power usage scenarios, such as mobile office, medical rescue, fire emergency rescue, power equipment repair, environmental and land protection, emergency communication guarantee, and power storage and backup, etc., and can ensure the basic power usage specifications and safety of the above outdoor power usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A hardware system structure block diagram of a mobile power supply device for outdoor use provided by the present invention; Figure 2 The present invention provides a working flow chart of a mobile power supply device for outdoor use. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments and drawings to help understand the content of the present invention.

[0022] The present invention provides a mobile power supply device for outdoor use, which adopts a trolley box structure, is provided with a shockproof and drop-proof shell and a multi-port output, and a hardware system is provided inside the shockproof and drop-proof shell. Figure 1 The figure shows a hardware system structure block diagram of a mobile power supply device for outdoor use provided by the present invention. The hardware system includes a battery, a solar controller, an inverter, an AC switch, a DC switch, a common charger charging detection circuit, a solar panel charging detection circuit, a diode circuit 1-3, a battery voltage detection circuit, a DC switch circuit, a relay circuit, a high-power diode circuit, a power conversion circuit 1-3, a real-time clock circuit, a single-chip computer control circuit, an AC switch circuit, a temperature detection circuit, a buzzer alarm circuit, an LCD display circuit, a fan control circuit, a power module circuit 1-3, an inverter control circuit and an inverter. The access signal of the common charger charging detection circuit is CHA_CHK, the access signal of the solar panel charging detection circuit is SUN_CHK, the output signal of the battery is BAT+, the output signal of the diode circuit 1~3 is BAT1, the output signal of the DC switch circuit is BAT1_COM, and the power conversion circuit The output signal of circuit 1 is 12V, the output signal of power conversion circuit 2 is 5V, the output signal of power conversion circuit 3 is 3.3V, the output signal of battery voltage detection circuit is BAT_DET, the signal of single chip microcomputer control relay circuit is BAT_SW, the output signal of relay circuit is BO+, the signal of single chip microcomputer control inverter operation is INV_SW, the signal of single chip microcomputer control fan rotation is FUN_SW, the signal of single chip microcomputer control buzzer alarm is BUZZER, the signal of single chip microcomputer temperature detection is DQ, the signal of single chip microcomputer AC switch detection is AC_DET, the signal of single chip microcomputer detection whether ordinary charger is connected is CHA, the signal of single chip microcomputer detection whether solar panel is connected is SUN, serial communication is carried out between single chip microcomputer and LCD display screen, and I2C communication is carried out between single chip microcomputer and real time clock circuit; The ordinary charger charging detection circuit uses an optocoupler to design a detection circuit to realize the function of ordinary charger connection / unplugging detection; the solar panel charging detection circuit uses an optocoupler to design a detection circuit to realize the function of solar panel connection / unplugging detection; the diode circuit 1-3 uses the unidirectional conductivity of the diode to ensure that the voltage of the device is input from the battery or ordinary charger or solar panel; the battery voltage detection circuit uses a combination of triode and MOS tube to design a switch circuit to realize battery voltage detection. When the system is powered off, the battery has no output circuit to ensure the stability of the battery; the DC switch circuit includes a resistor, a capacitor, a diode, a triode, and a MOS tube to jointly design a switch circuit, through The DC switch controls the on and off of the system BAT1_COM; the relay circuit includes a relay, a diode, a MOS tube and a resistor, and the on and off state of the relay is controlled by the single-chip control signal, that is, the on and off state of the battery BAT+ and BO+ is controlled, and the power module circuit 1-3, the inverter, and the solar controller are controlled by whether there is voltage on BO+ to control whether there is input voltage, thereby controlling their working state; the high-power diode circuit uses the high power and unidirectional conductivity of the high-power diode to achieve unidirectional output from the ordinary charger power CHA_CHK to BO+, and the power conversion circuit 1-3 includes a power conversion chip 1-3 and peripheral resistors and capacitors, which are used to convert and output 12V, 5V, 3V, respectively. .3V voltage is used to power various control and detection circuits inside the device. The real-time clock circuit is composed of a real-time clock chip and a peripheral circuit crystal oscillator, a backup battery, a resistor, and a capacitor. The system working time and the battery charging and discharging time are determined based on this time information. The single-chip microcomputer control circuit is composed of a single-chip microcomputer chip and a peripheral minimum system circuit. It has the functions of detecting temperature, battery power, ordinary charger / solar panel access, AC switch status, etc. It has the functions of controlling the operation of relays, buzzers, fans, inverters, etc. It uses I2C communication to realize the real-time clock function and uses serial communication to control the LCD screen display and other functions; the AC switch circuit is used for the single-chip microcomputer to detect the closing signal AC_D of the AC switch ET, realizes the working state of the inverter circuit; the temperature detection circuit includes a temperature sensor and a pull-up resistor, which are used to realize the function of temperature detection inside the device; the buzzer alarm circuit: uses transistors, resistors, and capacitors to design a switch circuit, and realizes the alarm function of the buzzer through the control of the single-chip microcomputer; the LCD display circuit communicates with the single-chip microcomputer through a serial port to realize the display function of the LCD; the fan control circuit uses transistors, resistors, capacitors, and diodes to design a switch circuit, and realizes the function of the single-chip microcomputer to control the internal fan of the device to start / stop; the power module circuit 1-3 includes a power conversion module 1-3 and peripheral resistors, capacitors, and diodes, which are used to convert and output DC 12V 4.17A, 12V 1.25A, 5V 1.2A power supply is led out to the device housing through an aviation plug for easy external access; the inverter control circuit includes an optocoupler circuit and a 485 communication circuit. The single-chip microcomputer controls whether the inverter circuit works by controlling the INV_SW signal. Data information is transmitted between the single-chip microcomputer and the inverter through 485 communication.

[0023] Preferably, the external input elements of the mobile power device during use include solar panels and ordinary chargers, and the internal output includes AC220V 50HZ power supply, DC12V 4.17A power supply, DC12V 1.25A power supply and DC5V 1.2A power supply.

[0024] Preferably, four fans with large air volume and heat dissipation are installed on the outside of the fan box. The fans are arranged in a semi-hidden design and equipped with a protective net to ensure safety and reliability while achieving a beautiful appearance. The fans are arranged with two air inlets and two air outlets, which can smoothly export the heat generated by the internal electrical appliances when the power supply is in working state to ensure the normal operation of the equipment.

[0025] Preferably, the multi-port output includes a DC power output and an AC power 220V output, the DC power output uses a waterproof metal aviation socket, and the AC power 220V output uses a waterproof, explosion-proof and flame-retardant national standard five-hole socket.

[0026] Preferably, the LCD display functions include battery charging and discharging status display, battery remaining power display, common charger and solar panel access display, AC220V output voltage and frequency display, load access status display, load overpower working status alarm display and device internal temperature information display.

[0027] Preferably, the battery adopts a lithium-ion battery pack, and its specifications are: nominal capacity 120Ah, nominal voltage 25.9V, standard charge and discharge current 24A, and discharge end voltage 18.9V; the specifications of the solar panel are: power 100W, voltage 36V, and can be charged with 24V battery; the specifications of the solar controller are: working voltage 24V, and can be connected to a solar panel power of 600W; the specifications of the inverter are: input voltage range 20-30V, output AC voltage 220V, output frequency 50HZ, output waveform is a pure sine wave, rated power 1000W, peak power 2000W; the model of the ordinary diode is SS36; the model of the high-power diode is MBR6045PT; the specification of the DC switch is a DC24V self-locking switch with light; the specification of the AC switch is a DC3.3V self-resetting switch with light; the model of the relay is JD2912-1H-24VDC; the power conversion circuit 1 The source conversion chip is SE3837B; the power conversion chip of the power conversion circuit 2 is LM7805S / TR; the power conversion chip of the power conversion circuit 3 is SPX3819M5-L-3-3 / TR; the model of the real-time clock chip is DS1307Z+T&R; the model of the single-chip microcomputer is STM32F103VET6; the model of the buzzer is TMB12A03; the model of the temperature sensor in the temperature detection circuit is DS18B20; the model of the LCD screen is DMT48320C035_06W; the size of the fan is 50*50*10, the operating voltage is 12V, and the rated current is 0.1A; the power module model of the power module circuit 1 is FD50-24S12B3C; the power module model of the power module circuit 2 is TDK15-24S12; the power module model of the power module circuit 3 is URB2405S-6WR3.

[0028] The present invention provides a working method of a mobile power supply device for outdoor use, including a DC output process, an AC output process, a common charger / solar panel charging process, and a temperature alarm and fan rotation process. Figure 2 As shown, it is a working flow chart of a mobile power supply device for outdoor use provided by the present invention, and the specific steps are: S1: The device is connected to the battery BAT and outputs BAT+; S2: The system detects whether the DC switch is pressed. If it is pressed, the system outputs BAT1_COM and the process continues to S3; if it is not pressed, the process continues to S10; S3: Power conversion circuit 1 outputs 12V, power conversion circuit 2 outputs 5V, and power conversion circuit 3 outputs 3.3V; S4: MCU system initialization, BAT_SW is configured to 1; S5: The relay circuit works and outputs BO+, entering the DC output process. The DC output process: the power module circuit 1 works to output DC12V 4.17A power, the power module circuit 2 works to output DC12V 1.25A power, and the power module circuit 3 works to output DC5V 1.2A power; S6: The system detects whether the AC switch is pressed. If it is pressed, it enters the AC output process. The AC output process: the detection signal ACC_DET=1, the microcontroller output INV_SW=1, the inverter circuit works, and the device outputs AC220V 50HZ power; if it is not pressed, the device has no AC output; S7: The system MCU detects whether BAT_DET is 0. When the battery voltage is greater than 20V, BAT_DET=1, and the system continues to S4; when the battery power is less than 20V, BAT_DET=0, and enters the ordinary charger / solar panel charging process. The ordinary charger / solar panel charging process includes the ordinary charger process and the solar panel charging process. Ordinary charger process: The system MCU detects whether CHA is 1. When the ordinary charger is connected, CHA=1, and the LCD shows that the ordinary charger is charging. When the MCU detects BAT_DET=1, the LCD shows that it is fully charged and prompts to unplug the charger; when the ordinary charger is not connected, CHA=0, and the system enters S9 and S10. Solar panel charging process: The system MCU detects whether SUN is 1. When the solar panel is connected, SUN=1, and the LCD shows that the solar panel is charging. When the MCU detects BAT_DET=1, the LCD shows that it is fully charged and prompts to unplug the solar panel; when the solar panel is not connected, SUN=0, and the system enters S9 and S10; S8: During normal operation of the device, the temperature alarm and fan rotation process is entered every 10 seconds. The temperature alarm and fan rotation process: when the temperature inside the device is greater than 45°, the MCU detection pin DQ=1, the MCU outputs FUN_SW=1 and BUZZER=1, the internal buzzer of the device alarms, and the fan starts to rotate to dissipate heat until the temperature inside the device is lower than 45°; when the temperature inside the device is ≤45°, the MCU detection pin DQ=0, the MCU outputs FUN_SW=0 and BUZZER=0, the internal buzzer of the device does not alarm, the fan does not rotate, and the system continues to S4; S9: MCU output BAT_SW=0; S10: The system does not work and all processes end.

[0029] The present invention can output both direct current and alternating current, and can be connected to both direct current equipment and alternating current equipment externally, and has strong applicability and practicality. The present invention supports both ordinary charger charging and solar panel charging, and has a variety of charging methods, which is convenient for users to flexibly choose according to their needs. The internal hardware circuit of the present invention is designed according to functional zoning, and can quickly alarm when a system fails, so that maintenance personnel can quickly locate the problem, which is convenient for designers to debug and test hardware, and convenient for maintenance personnel to quickly locate and solve problems. The present invention is provided with temperature alarm and buzzer alarm functions, which can remind users in time and can also automatically power off to protect equipment. The box body of the present invention adopts an integrated trolley case design, and the interface uses a waterproof aviation plug, which has strong integrity, is easy to carry, flexible to use, and has strong waterproofness, and can adapt to bad weather. Four fans with large air volume heat dissipation are installed on the outside of the box body of the present invention. The fan is arranged in a semi-hidden design, equipped with a protective net, and the fan arrangement method is two air inlets and two air outlets. The appearance effect is beautiful, and the heat generated by the internal electrical appliances of the power supply in the working state can be smoothly exported to ensure the normal operation of the equipment. The internal hardware circuit of the present invention adopts a modular design, and the single-chip control circuit and the power conversion output interface circuit are separated by independent design, and the power components and signal devices are placed separately, so that the circuit runs stably, safely and reliably. The present invention supports two charging modes: ordinary charger charging and solar panel charging, with LCD screen display function and buzzer alarm function, and can stably output AC power 220V 50HZ and DC power 12V 4.17A, 12V 1.25A, 5V 1.2A. The present invention can be applied to outdoor power use scenarios, such as mobile office, medical rescue, fire emergency rescue, power equipment repair, environmental land protection, emergency communication guarantee, and power storage and backup, etc., which can ensure the basic power use specifications and safety of the above outdoor power use scenarios.

[0030] The invention concept is described in detail using specific examples herein, and the description of the above embodiments is only used to help understand the core idea of ​​the invention. It should be pointed out that any obvious modification, equivalent substitution or other improvement made by a person of ordinary skill in the art without departing from the invention concept should be included in the protection scope of the present invention.

Claims

1. A mobile power supply device for outdoor use, characterized in that: The utility model adopts a trolley box structure, is provided with a shockproof and drop-proof shell and a multi-port output. A hardware system is arranged inside the shockproof and drop-proof shell. The hardware system includes a battery, a solar controller, an inverter, an AC switch, a DC switch, a common charger charging detection circuit, a solar panel charging detection circuit, a diode circuit 1-3, a battery voltage detection circuit, a DC switch circuit, a relay circuit, a high-power diode circuit, a power conversion circuit 1-3, a real-time clock circuit, a single-chip microcomputer control circuit, an AC switch circuit, a temperature detection circuit, a buzzer alarm circuit, an LCD display circuit, a fan control circuit, a power module circuit 1-3, an inverter control circuit and an inverter. The access signal of the common charger charging detection circuit is CHA_CHK, the access signal of the solar panel charging detection circuit is SUN_CHK, the output signal of the battery is BAT+, the output signal of the diode circuit 1~3 is BAT1, the DC switch circuit The output signal of the circuit is BAT1_COM, the output signal of the power conversion circuit 1 is 12V, the output signal of the power conversion circuit 2 is 5V, the output signal of the power conversion circuit 3 is 3.3V, the output signal of the battery voltage detection circuit is BAT_DET, the signal of the single-chip microcomputer controlling the relay circuit is BAT_SW, the output signal of the relay circuit is BO+, the signal of the single-chip microcomputer controlling the inverter operation is INV_SW, the signal of the single-chip microcomputer controlling the fan rotation is FUN_SW, the signal of the single-chip microcomputer controlling the buzzer alarm is BUZZER, the signal of the single-chip microcomputer for temperature detection is DQ, the signal of the single-chip microcomputer for AC switch detection is AC_DET, the signal of the single-chip microcomputer detecting whether the ordinary charger is connected is CHA, the signal of the single-chip microcomputer detecting whether the solar panel is connected is SUN, the single-chip microcomputer communicates with the LCD display through the serial port, and the single-chip microcomputer communicates with the real-time clock circuit through I2C; The ordinary charger charging detection circuit uses an optocoupler to design a detection circuit to realize the function of ordinary charger connection / unplugging detection; the solar panel charging detection circuit uses an optocoupler to design a detection circuit to realize the function of solar panel connection / unplugging detection; the diode circuit 1-3 uses the unidirectional conductivity of the diode to ensure that the voltage of the device is input from the battery or ordinary charger or solar panel; the battery voltage detection circuit uses a combination of triode and MOS tube to design a switch circuit to realize battery voltage detection. When the system is powered off, the battery has no output circuit to ensure the stability of the battery; the DC switch circuit includes a resistor, a capacitor, a diode, a triode, and a MOS tube to jointly design a switch circuit, through The DC switch controls the on and off of the system BAT1_COM; the relay circuit includes a relay, a diode, a MOS tube and a resistor, and the on and off state of the relay is controlled by the single-chip control signal, that is, the on and off state of the battery BAT+ and BO+ is controlled, and the power module circuit 1-3, the inverter, and the solar controller are controlled by whether there is voltage on BO+ to control whether there is input voltage, thereby controlling their working state; the high-power diode circuit uses the high power and unidirectional conductivity of the high-power diode to achieve unidirectional output from the ordinary charger power CHA_CHK to BO+, and the power conversion circuit 1-3 includes a power conversion chip 1-3 and peripheral resistors and capacitors, which are used to convert and output 12V, 5V, 3V, respectively. .3V voltage is used to power various control and detection circuits inside the device. The real-time clock circuit is composed of a real-time clock chip and a peripheral circuit crystal oscillator, a backup battery, a resistor, and a capacitor. The system working time and the battery charging and discharging time are determined based on this time information. The single-chip microcomputer control circuit is composed of a single-chip microcomputer chip and a peripheral minimum system circuit. It has the functions of detecting temperature, battery power, ordinary charger / solar panel access, AC switch status, etc. It has the functions of controlling the operation of relays, buzzers, fans, inverters, etc. It uses I2C communication to realize the real-time clock function and uses serial communication to control the LCD screen display and other functions; the AC switch circuit is used for the single-chip microcomputer to detect the closing signal AC_D of the AC switch ET, realizes the working state of the inverter circuit; the temperature detection circuit includes a temperature sensor and a pull-up resistor, which are used to realize the function of temperature detection inside the device; the buzzer alarm circuit: uses transistors, resistors, and capacitors to design a switch circuit, and realizes the alarm function of the buzzer through the control of the single-chip microcomputer; the LCD display circuit communicates with the single-chip microcomputer through a serial port to realize the display function of the LCD; the fan control circuit uses transistors, resistors, capacitors, and diodes to design a switch circuit, and realizes the function of the single-chip microcomputer to control the internal fan of the device to start / stop; the power module circuit 1-3 includes a power conversion module 1-3 and peripheral resistors, capacitors, and diodes, which are used to convert and output DC 12V 4.17A, 12V 1.25A, 5V 1.2A power supply is led out to the device housing through an aviation plug for easy external access; the inverter control circuit includes an optocoupler circuit and a 485 communication circuit. The single-chip microcomputer controls whether the inverter circuit works by controlling the INV_SW signal. Data information is transmitted between the single-chip microcomputer and the inverter through 485 communication.

2. A mobile power supply device for outdoor use according to claim 1, characterized in that: The external input elements of the mobile power supply device during use include solar panels and ordinary chargers, and the internal output includes AC220V 50HZ power supply, DC12V 4.17A power supply, DC12V 1.25A power supply and DC5V 1.2A power supply.

3. A mobile power supply device for outdoor use according to claim 2, characterized in that: Four fans with large air volume for heat dissipation are installed on the outside of the fan box. The fan layout is a semi-hidden design and is equipped with a protective net to ensure safety and reliability while achieving a beautiful appearance. The fans are arranged with two air inlets and two air outlets, which can smoothly export the heat generated by the internal electrical appliances when the power supply is in working state to ensure the normal operation of the equipment.

4. A mobile power supply device for outdoor use according to claim 3, characterized in that: The multi-port output includes a DC power output and an AC power 220V output. The DC power output uses a waterproof metal aviation socket, and the AC power 220V output uses a waterproof, explosion-proof and flame-retardant national standard five-hole socket.

5. A mobile power supply device for outdoor use according to claim 4, characterized in that: The LCD display functions include battery charging and discharging status display, battery remaining power display, ordinary charger and solar panel access display, AC220V output voltage and frequency display, load access status display, load overpower working status alarm display and device internal temperature information display.

6. A mobile power supply device for outdoor use according to claim 5, characterized in that: The battery adopts a lithium-ion battery pack, and its specifications are: nominal capacity 120Ah, nominal voltage 25.9V, standard charge and discharge current 24A, and discharge end voltage 18.9V; the specifications of the solar panel are: power 100W, voltage 36V, and can be charged with 24V battery; the specifications of the solar controller are: working voltage 24V, and can connect to the solar panel power of 600W; the specifications of the inverter are: input voltage range 20-30V, output AC voltage 220V, output frequency 50HZ, output waveform is pure sine wave, rated power 1000W, peak power 2000W; the model of the ordinary diode is SS36; the model of the high-power diode is MBR6045PT; the specification of the DC switch is DC24V self-locking switch with light; the specification of the AC switch is DC3.3V self-reset switch with light; the model of the relay is JD2912-1H-24VDC; the power conversion circuit 1 The power conversion chip is SE3837B; the power conversion chip of the power conversion circuit 2 is LM7805S / TR; the power conversion chip of the power conversion circuit 3 is SPX3819M5-L-3-3 / TR; the model of the real-time clock chip is DS1307Z+T&R; the model of the single-chip microcomputer is STM32F103VET6; the model of the buzzer is TMB12A03; the model of the temperature sensor in the temperature detection circuit is DS18B20; the model of the LCD screen is DMT48320C035_06W; the size of the fan is 50*50*10, the operating voltage is 12V, and the rated current is 0.1A; the power module model of the power module circuit 1 is FD50-24S12B3C; the power module model of the power module circuit 2 is TDK15-24S12; the power module model of the power module circuit 3 is URB2405S-6WR3.

7. A method for operating a mobile power supply device for outdoor use according to any one of claims 1 to 6, characterized in that: It includes DC output process, AC output process, ordinary charger / solar panel charging process, and temperature alarm and fan rotation process.

8. The operating method of a mobile power supply device for outdoor use according to claim 7, characterized in that: The specific steps are: S1: The device is connected to the battery BAT and outputs BAT+; S2: The system detects whether the DC switch is pressed. If it is pressed, the system outputs BAT1_COM and the process continues to S3; if it is not pressed, the process continues to S10; S3: Power conversion circuit 1 outputs 12V, power conversion circuit 2 outputs 5V, power conversion circuit 3 outputs 5V Output 3.3V; S4: MCU system initialization, BAT_SW is configured to 1; S5: The relay circuit works and outputs BO+, entering the DC output process. The DC output process: the power module circuit 1 works to output DC12V 4.17A power, the power module circuit 2 works to output DC12V 1.25A power, and the power module circuit 3 works to output DC5V 1.2A power; S6: The system detects whether the AC switch is pressed. If it is pressed, it enters the AC output process. The AC output process: the detection signal ACC_DET=1, the microcontroller output INV_SW=1, the inverter circuit works, and the device outputs AC220V 50HZ power; if it is not pressed, the device has no AC output; S7: The system MCU detects whether BAT_DET is 0. When the battery voltage is greater than 20V, BAT_DET=1, and the system continues to S4; when the battery power is less than 20V, BAT_DET=0, and enters the ordinary charger / solar panel charging process. The ordinary charger / solar panel charging process includes the ordinary charger process and the solar panel charging process. Ordinary charger process: The system MCU detects whether CHA is 1. When the ordinary charger is connected, CHA=1, and the LCD shows that the ordinary charger is charging. When the MCU detects BAT_DET=1, the LCD shows that it is fully charged, and prompts to unplug the charger; When the ordinary charger is not connected, CHA=0, the system enters S9 and S10, the solar panel charging process: the system MCU detects whether SUN is 1, when the solar panel is connected, SUN=1, the LCD shows that the solar panel is charging, when the MCU detects BAT_DET=1, the LCD shows that it is fully charged, and prompts to unplug the solar panel; when the solar panel is not connected, SUN=0, the system enters S9 and S10; S8: During normal operation of the device, the temperature alarm and fan rotation process is entered every 10 seconds. The temperature alarm and fan rotation process: when the temperature inside the device is greater than 45°, the MCU detection pin DQ=1, the MCU outputs FUN_SW=1 and BUZZER=1, the internal buzzer of the device alarms, and the fan starts to rotate to dissipate heat until the temperature inside the device is lower than 45°; when the temperature inside the device is ≤45°, the MCU detection pin DQ=0, the MCU outputs FUN_SW=0 and BUZZER=0, the internal buzzer of the device does not alarm, the fan does not rotate, and the system continues to S4; S9: MCU output BAT_SW=0; S10: The system does not work and all processes end.

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