CN211127281U

CN211127281U - Solar UPS power supply circuit

Info

Publication number: CN211127281U
Application number: CN201922089324.8U
Authority: CN
Inventors: 胡国强; 刘凤行; 孙孝聪; 刘国样
Original assignee: Zhengzhou Hanwei Intelligent Instrument Co ltd
Current assignee: Hanwei Water Technology Henan Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-07-28
Anticipated expiration: 2029-11-28

Abstract

The utility model provides a solar UPS power supply circuit, which comprises a lithium battery, a lithium battery voltage detection circuit, a charging positive terminal control circuit, a PWM inversion control circuit, an overload and load short circuit protection circuit, an output voltage detection circuit, a stabilized voltage power supply circuit, a microprocessor and a system state display circuit, wherein the stabilized voltage power supply circuit is connected with the lithium battery; the lithium battery voltage detection circuit is respectively connected with the stabilized voltage power supply circuit and the lithium battery, the overload and load short-circuit protection circuit is connected with the lithium battery, the charging positive terminal control circuit is connected with the solar cell panel, the output voltage detection circuit is respectively connected with the PWM inversion control circuit and the lithium battery, and the microprocessor is respectively connected with the stabilized voltage power supply circuit, the lithium battery voltage detection circuit, the charging positive terminal control circuit, the PWM inversion control circuit, the overload and load short-circuit protection circuit and the system state display circuit.

Description

Solar UPS power supply circuit

Technical Field

The utility model relates to a photovoltaic power generation technical field, specific theory has related to a solar energy UPS power supply circuit.

Background

The intelligent instrument is installed at a position (such as a concentrator, a flowmeter, a pressure meter and the like) and some sites have no commercial power, so that the power supply is difficult; if a common solar device is adopted, the solar device comprises a charging control device, a battery and an inverter device, the devices are mutually independent, waste is caused to field installation space, installation working hours and cost, and how to design a circuit to realize a power supply function, a charging function, an inverter function, a detection function and a display function at the same time becomes a problem to be solved urgently.

In order to solve the above problems, people are always seeking an ideal technical solution.

Disclosure of Invention

The utility model aims at the not enough of prior art to a solar energy UPS power supply circuit that design science, integrated level are high is provided.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a solar UPS power supply circuit comprises a solar cell panel, a lithium battery voltage detection circuit, a charging positive terminal control circuit, a PWM inversion control circuit, an overload and load short-circuit protection circuit, an output voltage detection circuit, a voltage-stabilized power supply circuit, a microprocessor and a system state display circuit, wherein preferably, the solar cell panel is selected from monocrystalline silicon or polycrystalline silicon of 12V 50W; the lithium battery is a polymer lithium battery with 12V9800 mAh.

The voltage-stabilized power supply circuit is connected with the lithium battery to provide a +5V power supply and a +3.3V power supply; the lithium battery voltage detection circuit is respectively connected with the stabilized voltage power supply circuit and the lithium battery, the overload and load short-circuit protection circuit is connected with the lithium battery, the charging positive terminal control circuit is connected with the solar cell panel, the output voltage detection circuit is respectively connected with the PWM inversion control circuit and the lithium battery, and the microprocessor is respectively connected with the stabilized voltage power supply circuit, the lithium battery voltage detection circuit, the charging positive terminal control circuit, the PWM inversion control circuit, the overload and load short-circuit protection circuit and the system state display circuit.

Based on the above, the positive control circuit that charges includes switch tube Q2 and triode Q1, the grid of switch tube Q2 pass through resistance R11 and resistance R13 respectively with solar cell panel's PV + with triode Q1's collecting electrode is connected, switch tube Q2's drain electrode pass through inductance L1 and diode D9 with the lithium cell is connected, triode Q1's emitter ground, triode Q1's base is connected with the one end of resistance R14.

Based on the above, the overload and load short-circuit protection circuit comprises a detection resistor R21 and an operational amplifier L M324, wherein one end of the detection resistor R21 is connected with the lithium battery, the other end of the detection resistor R21 is grounded, a pin 2 of the operational amplifier L M324 is connected with one end of the detection resistor R21 connected with the lithium battery through a resistor R15, a pin 3 of the operational amplifier L M324 is grounded, a pin 3 of the operational amplifier L M324 is also connected with a pin 2 of the operational amplifier L M324 through a capacitor C8, a pin 1 of the operational amplifier L M324 is connected with one end of the resistor R24, the other end of the resistor R24 is connected with a voltage stabilizing diode D11 and a filter capacitor C20, and a parallel circuit consisting of a resistor R19 and a capacitor C10 is further connected between the pin 1 of the operational amplifier L M324 and the pin 2 of the operational amplifier L M324.

Based on the above, the output voltage detection circuit comprises a transformer T, a bridge rectifier circuit composed of diodes D-D and an operational amplifier M324, wherein a pin 1 of an input end of the transformer T is connected with a pin 14 of the SG3525 chip through a switch circuit composed of a resistor R, a switch tube N, a resistor R and a capacitor C, a pin 3 of the input end of the transformer T is connected with a pin 11 of the SG3525 chip through a switch circuit composed of a resistor R, a switch tube N, a resistor R and a capacitor C, a pin 2 of the input end of the transformer T is connected with the lithium battery, a pin 4 and a pin 5 of a first output end of the transformer T output voltage to the outside through the bridge rectifier circuit composed of diodes D-D, a pin 6 of a second output end of the transformer T is connected with the positive electrode of the bridge rectifier circuit composed of diodes D-D, a pin 67 of the second output end of the transformer T is connected with the negative electrode of the bridge rectifier circuit composed of diodes D-D, a pin 324 is also connected with the operational amplifier M324, a pin R and a resistor R324 are connected between the operational amplifier M324, and a resistor R324, a resistor R and a resistor R are connected in series connection.

Based on the above, the PWM inversion control circuit comprises an SG3525 chip and a comparator L M324, wherein a pin 1 of the SG3525 chip is connected with a Vol power supply through a resistor R20, a pin 2 of the SG3525 chip is connected with the ground through a resistor R23, a pin 2 of the SG3525 chip is further connected with a pin 16 of the SG3525 chip through a resistor R22, a pin 3 of the SG3525 chip is grounded, a pin 5 of the SG3525 chip is grounded through a capacitor C17, a pin 6 of the SG3525 chip is grounded through a resistor R28 and a resistor R27 which are connected in series, a pin 7 of the SG3525 chip is respectively connected with a pin 5 of the SG3525 chip and the capacitor C17 through a resistor R31 and a variable resistor R30, a pin 8 of the SG3525 chip is grounded through a polar capacitor C8, a pin 9 of the SG3525 chip is grounded through a resistor R9648, a capacitor C21 and a capacitor C25 9, a pin 10 of the SG3525 chip receives an output signal of the SG3525 chip, a resistor R3513 of the SG3525 chip is connected with a resistor R6313 and a resistor R6313 of the microprocessor chip, and a resistor R6313 of the SG3525 chip are connected in series, and a resistor R6313 of the chip are connected between the resistor R3525 chip, and the resistor R3513 of the resistor R3525 chip, and the resistor R3513.

Based on the above, the lithium battery voltage detection circuit comprises a resistor R16, a resistor R17 and a capacitor C9, wherein the anode of the lithium battery is grounded through the resistor R16 and the resistor R17 which are connected in series, and the capacitor C9 and the zener diode DZ1 are respectively connected with the resistor R17 in parallel.

Based on the above, the voltage-stabilized power supply circuit comprises a first voltage-stabilized chip 7805 and a second voltage-stabilized chip SPX1117, wherein an input end of the first voltage-stabilized chip 7805 is connected with a power supply VBAT through a filter circuit composed of a polarity capacitor C14 and a capacitor C18, and an output pin of the first voltage-stabilized chip 7805 outputs a +5v power supply after being filtered through a polarity capacitor C15; the output pin of the first voltage regulation chip 7805 is further connected with the input pin of the second voltage regulation chip SPX1117, and the output pin of the second voltage regulation chip SPX1117 outputs +3.3V power after passing through a filter circuit formed by a polar capacitor C16 and a capacitor C19.

Based on the above, the microprocessor is an STM32F103 chip, 1 pin of the STM32F103 chip is connected with a TM respectively, 2 pins, 3 pins and 4 pins of the STM32F103 chip are connected with a +3.3V power supply through a L ED light emitting diode and a resistor respectively, a clock circuit consisting of a capacitor C3, a capacitor C5 and a crystal oscillator X1 is further connected between 5 pins of the STM32F103 chip and 6 pins of the STM32F103 chip, 7 pins of the STM32F103 chip are connected with the +3.3V power supply through a filter circuit consisting of a resistor R12 and a capacitor C7, 8 pins of the STM32F103 chip are grounded, 9 pins and 24 pins of the STM32F103 chip are directly connected with the +3.3V power supply, 13 pins of the STM32F103 chip are connected with the connection positions of the resistor R16 and the resistor R17, 14 pins of the STM32F103 chip are connected with the resistor R24 and the connection position of the voltage stabilizing diode D11, the STM32F chip are connected with the connection position, the other end of the STM32F chip, the STM32F103 chip is connected with the bus connection position, the resistor R6332F 19 pin of the STM32 chip, the STM32F chip, the resistor R9 pin and the connection position of the STM32F 103F 32 chip are connected with the bus connection pin 19 pin, and the resistor S32F bus connection pin 19 pin of the STM32 chip, and the connection pin 19 pin of the STM32F chip, the ST.

On the basis, the system state display circuit includes the interface of L CD screen, the 1 foot of output port of L CD screen connects the positive end of 3.3V voltage, 2 feet ground connections of L CD screen, 3 feet of L CD screen with 39 feet of STM32F103 chip are connected, 4 feet of L CD screen with 40 feet of STM32F103 chip are connected, 5 feet of L CD screen with 41 feet of STM32F103 chip are connected, 6 feet of L CD screen with 45 feet of STM32F103 chip are connected, 7 feet of L CD screen with 46 feet of STM32F103 chip are connected.

The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model discloses with lithium battery voltage detection circuit, charge positive terminal control circuit, PWM contravariant control circuit, overload and load short-circuit protection circuit, output voltage detection circuit, constant voltage power supply circuit, microprocessor and system status display circuit integrated for use this a circuit can realize functions such as power supply, charge, contravariant, detection and demonstration, have small, the advantage that the integrated level is high.

Drawings

Fig. 1 is a schematic block diagram of the present invention.

Fig. 2 is a schematic circuit diagram of the charging positive terminal control circuit of the present invention.

Fig. 3 is a schematic circuit diagram of the overload and load short-circuit protection circuit and the circuit schematic diagram of the lithium battery voltage detection circuit of the present invention.

Fig. 4 is a schematic circuit diagram of the PWM inverter control circuit according to the present invention.

Fig. 5 is a schematic circuit diagram of the output voltage detection circuit of the present invention.

Fig. 6 is a schematic circuit diagram of the regulated power supply circuit of the present invention.

Fig. 7 is a circuit diagram of the microprocessor and the system status display circuit according to the present invention.

Detailed Description

The technical solution of the present invention will be described in further detail through the following embodiments.

As shown in fig. 1, a solar UPS power circuit includes a solar panel, a lithium battery voltage detection circuit, a charging positive terminal control circuit, a PWM inverter control circuit, an overload and load short circuit protection circuit, an output voltage detection circuit, a regulated power supply circuit, a microprocessor, and a system status display circuit.

Specifically, as shown in fig. 2, the charging positive terminal control circuit includes a switching tube Q2 and a transistor Q1, a gate of the switching tube Q2 is connected to a PV + of the solar cell panel and a collector of the transistor Q1 through a resistor R11 and a resistor R13, a drain of the switching tube Q2 is connected to the lithium battery through an inductor L1 and a diode D9, an emitter of the transistor Q1 is grounded, and a base of the transistor Q1 is connected to one end of the resistor R14.

Specifically, as shown in fig. 3, the lithium battery voltage detection circuit includes a resistor R16, a resistor R17, and a capacitor C9, the positive electrode of the lithium battery is grounded through the resistor R16 and the resistor R17 which are connected in series, and the capacitor C9 and the zener diode DZ1 are respectively connected in parallel with the resistor R17.

The overload and load short-circuit protection circuit comprises a detection resistor R21 and an operational amplifier L M324, wherein one end of the detection resistor R21 is connected with a lithium battery, the other end of the detection resistor R21 is grounded, a pin 2 of the operational amplifier L M324 is connected with one end, connected with the detection resistor R21 and the lithium battery, of the detection resistor R21 through a resistor R15, a pin 3 of the operational amplifier L M324 is grounded, a pin 3 of the operational amplifier L M324 is also connected with a pin 2 of the operational amplifier L M324 through a capacitor C8, a pin 1 of the operational amplifier L M324 is connected with one end of the resistor R24, the other end of the resistor R24 is connected with a voltage stabilizing diode D11 and a filter capacitor C20, and a parallel circuit consisting of a resistor R19 and a capacitor C10 is further connected between the pin 1 of the operational amplifier L M324 and the pin 2 of the operational amplifier L M324.

Specifically, as shown in fig. 4, the PWM inverter control circuit includes an SG3525 chip and a comparator L M324, a pin 1 of the SG3525 chip is connected to a Vol power supply through a resistor R20, a pin 2 of the SG3525 chip is connected to ground through a resistor R23, a pin 2 of the SG3525 chip is further connected to a pin 16 of the SG3525 chip through a resistor R22, a pin 3 of the SG3525 chip is grounded, a pin 5 of the SG3525 chip is grounded through a capacitor C17, a pin 6 of the SG3525 chip is grounded through a resistor R28 and a resistor R27 connected in series, a pin 7 of the SG3525 chip is connected to a pin 5 of the SG3525 chip and the capacitor C17 through a resistor R31 and a variable resistor R30, a pin 8 of the SG3525 chip is grounded through a polar capacitor C8, a pin 9 of the SG3525 chip is connected to ground through a resistor R9648, a capacitor C21 and a capacitor C22, a pin 10 of the SG3525 chip is connected to ground, a pin 3525 resistor R3513 of the SG3525 chip is connected to ground, a resistor R6313 of the SG3525 chip, a resistor R3525 chip is connected in series, a resistor R3525 chip is connected between the SG3525 chip, a resistor R3525 chip is connected to ground, a resistor R3513C 59613C 9 of the SG3525 chip is connected to ground, a resistor R3525 chip is connected between the SG3525 chip, a resistor R3525 chip is connected to ground, a resistor R9.

Specifically, as shown in fig. 5, the output voltage detection circuit includes a transformer T, a bridge rectifier circuit composed of diodes D-D, and an operational amplifier M324, wherein pin 1 of the input terminal of the transformer T is connected to pin 14 of the SG3525 chip through a switch circuit composed of a resistor R, a switching tube N, a resistor R, and a capacitor C, pin 3 of the input terminal of the transformer T is connected to pin 11 of the SG3525 chip through a switch circuit composed of a resistor R, a switching tube N, a resistor R, and a capacitor C, pin 2 of the input terminal of the transformer T is connected to the lithium battery, pin 4 and pin 5 of the first output terminal of the transformer T output voltage to the outside through the bridge rectifier circuit composed of diodes D-D, pin 6 of the second output terminal of the transformer T is connected to the positive terminal of the bridge rectifier circuit composed of diodes D-D, pin 67 of the second output terminal of the transformer T is connected to the negative terminal of the bridge rectifier circuit composed of diodes D-D, pin 324 of the bridge rectifier circuit composed of diodes D-D is connected to the negative terminal of the operational amplifier M324, and the operational amplifier M324 are connected to the resistor R, the operational amplifier M324, and the operational amplifier M324, the resistor R-D are connected to the ground.

Specifically, as shown in fig. 6, the regulated power supply circuit includes a first voltage regulation chip 7805 and a second voltage regulation chip SPX1117, an input terminal of the first voltage regulation chip 7805 is connected to the power supply VBAT through a filter circuit composed of a polarity capacitor C14 and a capacitor C18, and an output pin of the first voltage regulation chip 7805 outputs +5v power after being filtered through a polarity capacitor C15; the output pin of the first voltage regulation chip 7805 is further connected with the input pin of the second voltage regulation chip SPX1117, and the output pin of the second voltage regulation chip SPX1117 outputs +3.3V power after passing through a filter circuit formed by a polar capacitor C16 and a capacitor C19.

Specifically, as shown in FIG. 7, the microprocessor is an STM32F103 chip, a pin 1 of the STM32F103 chip is connected with a TM, a pin 2, a pin 3 and a pin 4 of the STM32F103 chip are connected with a +3.3V power supply through a L ED light emitting diode and a resistor, a clock circuit consisting of a capacitor C3, a capacitor C5 and a crystal oscillator X1 is further connected between a pin 5 of the STM32F103 chip and a pin 6 of the STM32F103 chip, a pin 7 of the STM32F103 chip is connected with the +3.3V power supply through a filter circuit consisting of a resistor R12 and a capacitor C7, a pin 8 of the STM32F103 chip is grounded, a pin 9 and a pin 24 of the STM32F103 chip are directly connected with the +3.3V power supply, a pin 13 of the STM32F103 chip is connected with a connection position of the resistor R16 and the resistor R17, a pin 14 of the STM32F103 chip is further connected with a resistor R24 and a pin D24 of the STM32F103 chip, a pin 13 of the STM32F103 chip is connected with a pin 19 and a pin 19 of the STM32F chip, and a pin 19 of the STM32F chip are connected with a connection pin 19 and a voltage stabilizing chip through a pin 19 and a connection pin 19 of the STM32F chip, and a bus connection pin 19 of the STM32F 19 chip, and a connection pin 19.

Specifically, the system state display circuit includes the interface of L CD screen, the 1 pin of the output port of L CD screen connects the positive end of 3.3V voltage, 2 pin ground connections of L CD screen, 3 pin of L CD screen with 39 pins of STM32F103 chip are connected, 4 pins of L CD screen with 40 pins of STM32F103 chip are connected, 5 pins of L CD screen with 41 pins of STM32F103 chip are connected, 6 pins of L CD screen with 45 pins of STM32F103 chip are connected, 7 pins of L CD screen with 46 pins of STM32F103 chip are connected.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. A solar UPS power supply circuit, characterized in that: the system comprises a solar cell panel, a lithium battery voltage detection circuit, a charging positive terminal control circuit, a PWM (pulse-width modulation) inversion control circuit, an overload and load short-circuit protection circuit, an output voltage detection circuit, a stabilized voltage power supply circuit, a microprocessor and a system state display circuit, wherein the stabilized voltage power supply circuit is connected with the lithium battery to provide a +5V power supply and a +3.3V power supply; the lithium battery voltage detection circuit is respectively connected with the stabilized voltage power supply circuit and the lithium battery, the overload and load short-circuit protection circuit is connected with the lithium battery, the charging positive terminal control circuit is connected with the solar cell panel, the output voltage detection circuit is respectively connected with the PWM inversion control circuit and the lithium battery, and the microprocessor is respectively connected with the stabilized voltage power supply circuit, the lithium battery voltage detection circuit, the charging positive terminal control circuit, the PWM inversion control circuit, the overload and load short-circuit protection circuit and the system state display circuit.

2. The solar UPS power supply circuit of claim 1, wherein the charging positive terminal control circuit comprises a switch tube Q2 and a transistor Q1, the gate of the switch tube Q2 is connected to the PV + input of the solar panel and the collector of the transistor Q1 through a resistor R11 and a resistor R13, respectively, the drain of the switch tube Q2 is connected to the Li battery through an inductor L1 and a diode D9, the emitter of the transistor Q1 is grounded, and the base of the transistor Q1 is connected to one end of a resistor R14.

3. The solar UPS power supply circuit of claim 2, wherein the overload and load short circuit protection circuit comprises a detection resistor R21 and an operational amplifier L M324, one end of the detection resistor R21 is connected with the lithium battery, the other end of the detection resistor R21 is grounded, a pin 2 of the operational amplifier L M324 is connected with one end of the detection resistor R21 connected with the lithium battery through a resistor R15, a pin 3 of the operational amplifier L M324 is grounded, a pin 3 of the operational amplifier L M324 is also connected with a pin 2 of the operational amplifier L M324 through a capacitor C8, a pin 1 of the operational amplifier L M324 is connected with one end of the resistor R24, the other end of the resistor R24 is connected with a voltage stabilizing diode D11 and a filter capacitor C20, and a parallel circuit consisting of a resistor R19 and a capacitor C10 is further connected between a pin 1 of the operational amplifier L M324 and a pin 2 of the operational amplifier L M324.

4. The solar UPS circuit of claim 3, wherein the PWM inverter control circuit comprises an SG3525 chip and a comparator L M324, a 1 pin of the SG3525 chip is connected with a Vol power supply through a resistor R20, a 2 pin of the SG3525 chip is connected with the ground through a resistor R23, a 2 pin of the SG3525 chip is further connected with a 16 pin of the SG3525 chip through a resistor R22, a 3 pin of the SG3525 chip is grounded, a 5 pin of the SG3525 chip is grounded through a capacitor C17, a 6 pin of the SG3525 chip is grounded through a resistor R28 and a resistor R27 which are connected in series, a 7 pin of the SG3525 chip is connected with a 5 pin of the SG3525 chip and the capacitor C17 through a resistor R31 and a variable resistor R30 respectively, a pin of the SG 358 pin of the SG3525 chip is grounded through a polar capacitor C38, a 9 pin of the SG 353925 chip is connected with a ground through a resistor R26, a capacitor C21 and a capacitor C3629, a pin of the SG3525 chip is connected with a filter circuit of the SG 3525C 25 5 chip, a resistor SG 3513 resistor R6313C 9 pin of the SG3525 chip is connected in series, a filter circuit of the SG3525 chip is connected between the SG3525 chip, a resistor SG3525 chip is connected with a resistor R6313 resistor of the power supply circuit, a resistor SG3525 and a resistor of the microprocessor 3525 and a resistor MB 12, a resistor SG3525 chip, a resistor SG3525 resistor MB 12 of the microprocessor is connected between the microprocessor, a resistor of the earth, a resistor R.

5. The solar UPS circuit of claim 4, wherein the output voltage detection circuit comprises a transformer T, a bridge rectifier circuit composed of diodes D-D and an operational amplifier M324, wherein a pin 1 of an input end of the transformer T is connected with a pin 14 of the SG3525 chip through a switch circuit composed of a resistor R, a switch tube N, a resistor R and a capacitor C, a pin 3 of an input end of the transformer T is connected with a pin 11 of the SG3525 chip through a switch circuit composed of a resistor R, a switch tube N, a resistor R and a capacitor C, a pin 2 of an input end of the transformer T is connected with the lithium battery, a pin 4 and a pin 5 of a first output end of the transformer T output end output voltage outwards through the bridge rectifier circuit composed of diodes D-D, a pin 6 of a second output end of the transformer T is connected with a positive electrode of the bridge rectifier circuit composed of diodes D-D, a pin 67 of a second output end of the transformer T is connected with a negative electrode of the bridge rectifier circuit composed of diodes D-D, a pin R324 is connected with a pin R, a pin R-D of the operational amplifier M324, a resistor R is connected with a pin R324, a pin 7 of the operational amplifier M324 is connected with a negative electrode of the operational amplifier, and a resistor R, a resistor R is connected between the operational amplifier M324, and a resistor R are connected between the operational amplifier M324, and a resistor R are connected in series.

6. A solar UPS power supply circuit as described in claim 5, wherein: the lithium battery voltage detection circuit comprises a resistor R16, a resistor R17 and a capacitor C9, the anode of the lithium battery is grounded through the resistor R16 and the resistor R17 which are connected in series, and the capacitor C9 and the voltage stabilizing diode DZ1 are respectively connected with the resistor R17 in parallel.

7. A solar UPS power supply circuit as described in claim 6, wherein: the voltage-stabilized power supply circuit comprises a first voltage-stabilized chip 7805 and a second voltage-stabilized chip SPX1117, wherein the input end of the first voltage-stabilized chip 7805 is connected with a power supply VBAT through a filter circuit consisting of a polarity capacitor C14 and a capacitor C18, and the output pin of the first voltage-stabilized chip 7805 is filtered through a polarity capacitor C15 and then outputs a +5v power supply; the output pin of the first voltage regulation chip 7805 is further connected with the input pin of the second voltage regulation chip SPX1117, and the output pin of the second voltage regulation chip SPX1117 outputs +3.3V power after passing through a filter circuit formed by a polar capacitor C16 and a capacitor C19.

8. The solar UPS power supply circuit of claim 7, wherein the microprocessor is an STM32F103 chip, 1 pin of the STM32F103 chip is connected with a TM respectively, 2 pins, 3 pins and 4 pins of the STM32F103 chip are connected with a +3.3V power supply through a L ED light emitting diode and a resistor respectively, a clock circuit consisting of a capacitor C3, a capacitor C5 and a crystal oscillator X1 is further connected between a 5 pin of the STM32F103 chip and a 6 pin of the STM32F103 chip, 7 pins of the STM32F103 chip are connected with the +3.3V power supply through a filter circuit consisting of a resistor R12 and a capacitor C7, an 8 pin of the STM32F103 chip is grounded, a 9 pin and a 24 pin of the STM32F103 chip are directly connected with the +3.3V power supply, a 13 pin of the STM32F103 chip is connected with a connection point of the resistor R16 and the resistor R634, a 14 pin of the STM32F103 chip is further connected with a resistor R3523 pin of the STM32F103 chip and a connection point of the STM32F 32 chip, a resistor R6323 pin is connected with a connection point of the STM32F103 chip, a connection point is connected with a connection point of the STM32F 19 pin of the STM32F103 chip, and a connection point of the STM32F103 chip, and a resistor R9 pin 19 is connected with a connection point of the STM32F 19 chip, and a resistor R9 pin of the STM32F 19 chip, and a connection point of the STM32F 19 chip, the STM32F 19 is.

9. The solar UPS power supply circuit of claim 8, wherein the system state display circuit comprises an interface of L CD screen, pin 1 of output port of the L CD screen is connected with a positive terminal of 3.3V voltage, pin 2 of the L CD screen is connected with ground, pin 3 of the L CD screen is connected with pin 39 of the STM32F103 chip, pin 4 of the L CD screen is connected with pin 40 of the STM32F103 chip, pin 5 of the L CD screen is connected with pin 41 of the STM32F103 chip, pin 6 of the L CD screen is connected with pin 45 of the STM32F103 chip, and pin 7 of the L CD screen is connected with pin 46 of the STM32F103 chip.