CN114784943B

CN114784943B - Solar energy storage control circuit

Info

Publication number: CN114784943B
Application number: CN202210533210.1A
Authority: CN
Inventors: 欧炜昌; 黄鹏; 杨光明; 赵智星; 詹海峰; 谢峰; 胡宪权; 冷昭君; 万威; 黄浩
Original assignee: Hunan Giantsun Power Electronics Co Ltd
Current assignee: Hunan Giantsun Power Electronics Co Ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2023-05-26
Anticipated expiration: 2042-05-17
Also published as: CN114784943A

Abstract

The invention discloses a solar energy storage control circuit, which comprises a DC input circuit, an input protection circuit, an input detection and filter circuit, a PWM circuit for controlling output power, an MCU, an output detection and protection circuit, a filter circuit, an automatic charge detection module and a battery; the DC input circuit, the input protection circuit, the input detection and filter circuit, the PWM circuit, the output detection and protection circuit, the filter circuit and the battery are sequentially connected, and the MCU is respectively connected with the PWM circuit and the battery; the automatic charging detection module comprises an input sampling unit for sampling input current and an output sampling unit for adopting output current, wherein the input sampling unit is connected between the PWM circuit and the input detection and filtering circuit, and the output sampling unit is connected between the PWM circuit and the output detection and protection circuit. The invention can realize real-time intelligent control of the maximum power charging and shortens the charging time of a user.

Description

Solar energy storage control circuit

Technical Field

The invention relates to the technical field of solar energy, in particular to a solar energy storage control circuit.

Background

With the rapid development of the rapid charging technology, particularly under the outdoor or power failure condition, the energy storage power supply brings great convenience to people. With the release of the carbon neutralization concept, more and more people select clean energy sources such as electric automobiles, wind power generation, solar power generation and the like, and on the premise of large direction, the combination of the fast charging technology and the carbon neutralization concept generates a solar energy storage control circuit. Solar energy is used as an important clean energy source, and is rapidly developed due to the advantages of inexhaustibility, no pollution and the like. Most of the energy storage power sources in the market at present have low solar energy charging efficiency, and the output of the energy storage power sources has obvious nonlinear characteristics due to the influence of various aspects of environments (mainly including sunlight intensity, temperature and humidity), so that the maximum efficiency of solar energy cannot be converted into electric energy output.

Accordingly, improvements and developments in the art are still needed.

Disclosure of Invention

The invention aims to provide a solar energy storage control circuit, which aims to solve the technical problem of low charging efficiency in the existing solar energy storage control technology.

In order to achieve the above purpose, the technical scheme of the invention is as follows: the solar energy storage control circuit comprises a DC input circuit, an input protection circuit, an input detection and filter circuit, a PWM circuit for controlling output power, an MCU, an output detection and protection circuit, a filter circuit, an automatic charging detection module and a battery; the DC input circuit, the input protection circuit, the input detection and filter circuit, the PWM circuit, the output detection and protection circuit, the filter circuit and the battery are sequentially connected, and the MCU is respectively connected with the PWM circuit and the battery; the automatic charging detection module comprises an input sampling unit for sampling input current and an output sampling unit for adopting output current, wherein the input sampling unit is connected between the PWM circuit and the input detection and filtering circuit, and the output sampling unit is connected between the PWM circuit and the output detection and protection circuit.

The solar energy storage control circuit comprises an anti-reverse connection unit for preventing reverse connection and an overvoltage protection unit for preventing overlarge input voltage, wherein the anti-reverse connection unit is connected with the overvoltage protection unit.

The solar energy storage control circuit, wherein, prevent reverse connection unit includes field effect tube Q2, resistance R8 and resistance R9, the negative pole of DC input circuit is connected to field effect tube Q2 ' S D utmost point, DC input circuit ' S positive pole is connected through resistance R8 to field effect tube Q2 ' S G utmost point, field effect tube Q2 ' S S utmost point is connected between field effect tube Q2 ' S G utmost point and resistance R8 through resistance R9.

The solar energy storage control circuit, wherein the overvoltage protection unit comprises a voltage stabilizing diode ZV1, a voltage stabilizing diode TVS1, a triode Q9, a field effect transistor Q11, a field effect transistor Q10, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R40 and a resistor R41; the positive electrode of the voltage stabilizing diode ZV1 is connected with the S electrode of the field effect tube Q2, the negative electrode of the voltage stabilizing diode ZV1 is connected with the triode Q9 through a resistor R37 and a resistor R36 respectively, and the triode Q9 is connected with the G electrode of the field effect tube Q10 through a resistor R38; the G pole of the field effect tube Q10 is connected with the positive pole of the zener diode ZV1 and the S pole of the field effect tube Q2 through a resistor R39; the S electrode of the field effect tube Q10 is respectively connected with the S electrode of the field effect tube Q11 and the S electrode of the field effect tube Q11; the D pole of the field effect tube Q10 is connected with the S pole of the field effect tube Q11 through a resistor 41, and the D pole of the field effect tube Q10 is connected with the cathode of the voltage stabilizing diode TVS1 through a resistor R40; the positive electrode of the voltage stabilizing diode TVS1 is connected with the D electrode of the field effect transistor Q11, and the G electrode of the field effect transistor Q11 is connected between the resistor R40 and the resistor R41.

The solar energy storage control circuit comprises an SC8886 voltage conversion chip, an inductor L1, a field effect tube Q3, a field effect tube Q4, a field effect tube Q5 and a field effect tube Q6; the D electrode of the field effect tube Q3 is connected with the D electrode of the field effect tube Q6 through an inductor L1, the D electrode of the field effect tube Q3 is connected with the S electrode of the field effect tube Q4, and the D electrode of the field effect tube Q6 is connected with the S electrode of the field effect tube Q5; the G pole of the field effect tube Q3, the G pole of the field effect tube Q4, the G pole of the field effect tube Q5 and the G pole of the field effect tube Q6 are respectively connected with the SC8886 voltage conversion chip; the S electrode of the field effect transistor Q3 is connected with the S electrode of the field effect transistor Q6.

The solar energy storage control circuit comprises an input detection unit and an input filtering unit, wherein one end of the input filtering unit is connected with the overvoltage protection unit, and the other end of the input filtering unit is connected with the input detection unit.

The solar energy storage control circuit comprises an input detection unit, a control unit and a control unit, wherein the input detection unit comprises a resistor R10, a resistor R11, a resistor R12, a capacitor C8 and a capacitor C9; one end of the resistor R10 is connected with the output end of the input filtering unit, and the other end of the resistor R10 is connected with the D pole of the field effect transistor Q4; one end of the resistor R10 is connected with the 3 pin of the SC8886 voltage conversion chip through a resistor R11, and the other end of the resistor R10 is connected with the 2 pin of the SC8886 voltage conversion chip through a resistor R12; one end of the resistor R11 connected with the SC8886 voltage conversion chip is grounded through a capacitor C8; one end of the resistor R12 connected with the SC8886 voltage conversion chip is grounded through a capacitor C9.

The solar energy storage control circuit, wherein the output detection and protection circuit comprises: the device comprises an output detection unit and a protection unit, wherein one end of the protection unit is connected with the D electrode of the field effect transistor Q5, and the other end of the protection unit is connected with the output detection unit; the output detection unit is connected with one end of the filter circuit;

the output detection unit includes: resistor R19, resistor R20, resistor R21, and capacitor C22; the positive electrode of the resistor R19 is connected with the 20 pins of the SC8886 voltage conversion chip through a resistor R20; the negative electrode of the resistor R19 is connected with the 19 pin of the SC8886 voltage conversion chip through a resistor R21; a capacitor C22 is connected between the positive electrode of the resistor R20 and the positive electrode of the resistor R21.

The solar energy storage control circuit comprises an input sampling unit, a control unit and a control unit, wherein the input sampling unit comprises a capacitor C25 and a resistor R22, and the positive electrode of the resistor R22 is connected with the negative electrode of the resistor R10; the negative electrode of the resistor R22 is connected with the 1 pin of the SC8886 voltage conversion chip, and the negative electrode of the resistor R22 is grounded through a capacitor C25;

the output sampling unit comprises a capacitor C28, one end of the capacitor C28 is grounded, and the other end of the capacitor C28 is connected with the 22 pin of the SC8886 voltage conversion chip and the D electrode of the field effect transistor Q5.

The solar energy storage control circuit comprises a capacitor C23 and a capacitor C24, wherein the capacitor C23 and the capacitor C24 are connected in parallel, one end of the capacitor C23 and one end of the capacitor C24 after being connected in parallel are connected with the negative electrode of a resistor R19, and the other end of the capacitor C23 and the other end of the capacitor C24 after being connected in parallel are grounded.

The beneficial effects are that: the invention realizes real-time intelligent control of maximum power charging by adopting the MCU in combination with the PWM circuit and the automatic charging detection module, greatly shortens the charging time of the user, meets the urgent need of the user for urgent need of electricity, and has strong universality and practicability.

Drawings

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

Fig. 2 is a circuit diagram of the present invention.

Fig. 3 is a circuit diagram of the MCU connection of the present invention.

Fig. 4 is a circuit diagram of an input protection circuit, an input detection and filtering circuit in the present invention.

Fig. 5 is a circuit diagram of the output detection and protection circuit of the present invention.

Fig. 6 is a circuit diagram of the PWM circuit of the present invention.

Fig. 7 is a circuit diagram showing the connection between the filter circuit and the battery according to the present invention.

In the figure: 1. a DC input circuit; 2. an input protection circuit; 3. an input detection and filtering circuit; 4. a PWM circuit; 5. an output detection and protection circuit; 6. a filter circuit; 7. an MCU; 8. a battery; 9. an input sampling unit; 10. an output sampling unit; 20. an anti-reverse connection unit; 21. an overvoltage protection unit; 30. an input detection unit; 31. an input filtering unit; 50. an output detection unit; 51. and a protection unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear and clear, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1 to 7, the invention discloses a solar energy storage control circuit, which comprises a DC input circuit 1, an input protection circuit 2, an input detection and filter circuit 3, a PWM circuit 4 for controlling output power, an MCU 7, an output detection and protection circuit 5, a filter circuit 6, an automatic charge detection module and a battery 8; the DC input circuit 1, the input protection circuit 2, the input detection and filter circuit 3, the PWM circuit 4, the output detection and protection circuit 5, the filter circuit 6 and the battery 8 are sequentially connected, and the MCU 7 is respectively connected with the PWM circuit 4 and the battery 8; the automatic charge detection module comprises an input sampling unit 9 for sampling input current and an output sampling unit 10 for adopting output current, wherein the input sampling unit 9 is connected between the PWM circuit 4 and the input detection and filter circuit 3, and the output sampling unit 10 is connected between the PWM circuit 4 and the output detection and protection circuit 5.

After the structure is adopted, the input protection circuit 2 is used for protecting the current and the voltage input by the DC input circuit 1 from being too large, so that the elements of the rear-end load are not damaged, and the current and the voltage of the electric energy converted by the photovoltaic panel are also changed due to the change of the illumination intensity because of the different illumination intensities of the solar energy storage; for example: the voltage and current of the solar circuit vary greatly on cloudy and sunny days, so the power resulting in charging also differs greatly. Whether external equipment is accessed or not can be automatically identified through the automatic charging automatic detection module; the input detection and filter circuit 3 and the output detection and protection circuit 5 can synchronously collect the voltage and current in the charging process; and is fed back to the MCU 7 through the PWM circuit 4, and is monitored in real time by the MCU 7, and once the set value is exceeded, the standing horse enters a protection state. The voltage and current of the input and the output are controlled by the PWM circuit 4, and when the power of the input end changes rapidly, the SC8886 voltage conversion chip can be controlled by the MCU 7 to quickly obtain the maximum power output of the output end and continuously maintain the maximum power. Therefore, the PWM circuit 4, the MCU 7 and the automatic charging detection module are matched with each other to realize the control of whether the solar energy storage control circuit is connected with external equipment or not, and the PWM circuit 4 and the MCU 7 realize the control and monitoring of the maximum output power.

Preferably, the input protection circuit 2 includes an anti-reverse connection unit 20 for preventing reverse connection and an overvoltage protection unit 21 for preventing an excessive input voltage, and the anti-reverse connection unit 20 is connected to the overvoltage protection unit 21.

Preferably, the anti-reverse connection unit 20 includes a field effect transistor Q2, a resistor R8 and a resistor R9, wherein a D pole of the field effect transistor Q2 is connected to a negative pole of the DC input circuit 1, a G pole of the field effect transistor Q2 is connected to a positive pole of the DC input circuit 1 through the resistor R8, and an S pole of the field effect transistor Q2 is connected between the G pole of the field effect transistor Q2 and the resistor R8 through the resistor R9.

After the structure is adopted, the resistor R8, the resistor R9 and the field effect transistor Q2 form an inverse connection protection circuit together; in the positive connection, after the resistor R8 and the resistor R9 are divided, the voltage is connected to the grid electrode of the field effect transistor Q2, and the field effect transistor Q2 is normally opened; in the reverse connection, after the resistor R8 and the resistor R9 are divided, the field effect transistor Q2 cannot be opened, so that the following components are protected from being damaged.

Preferably, the overvoltage protection unit 21 includes a zener diode ZV1, a zener diode TVS1, a triode Q9, a field effect transistor Q11, a field effect transistor Q10, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R40, and a resistor R41; the positive electrode of the voltage stabilizing diode ZV1 is connected with the S electrode of the field effect tube Q2, the negative electrode of the voltage stabilizing diode ZV1 is connected with the triode Q9 through a resistor R37 and a resistor R36 respectively, and the triode Q9 is connected with the G electrode of the field effect tube Q10 through a resistor R38; the G pole of the field effect tube Q10 is connected with the positive pole of the zener diode ZV1 and the S pole of the field effect tube Q2 through a resistor R39; the S electrode of the field effect tube Q10 is respectively connected with the S electrode of the field effect tube Q11 and the S electrode of the field effect tube Q11; the D pole of the field effect tube Q10 is connected with the S pole of the field effect tube Q11 through a resistor 41, and the D pole of the field effect tube Q10 is connected with the cathode of the voltage stabilizing diode TVS1 through a resistor R40; the positive electrode of the voltage stabilizing diode TVS1 is connected with the D electrode of the field effect transistor Q11, and the G electrode of the field effect transistor Q11 is connected between the resistor R40 and the resistor R41.

Overvoltage conditions in solar energy storage control circuits fall into two categories: one is a transient voltage that is too high and one is a sustaining voltage that is too high. If the transient voltage is too high, a voltage stabilizing diode TVS1 is arranged in the circuit and used for absorbing the transient voltage peak; if the continuous voltage is too high, the triode Q9 is opened through the voltage stabilizing diode ZV1, the Q10 is opened through the R38 and R39 voltage dividing resistors, the grid electrode of the Q11 is short-circuited with the ground after the Q10 is opened, and therefore the field effect transistor Q11 is closed, and the purpose of input protection is achieved.

Preferably, the PWM circuit 4 includes an SC8886 voltage conversion chip, an inductor L1, a field-effect transistor Q3, a field-effect transistor Q4, a field-effect transistor Q5, and a field-effect transistor Q6; the D electrode of the field effect tube Q3 is connected with the D electrode of the field effect tube Q6 through an inductor L1, the D electrode of the field effect tube Q3 is connected with the S electrode of the field effect tube Q4, and the D electrode of the field effect tube Q6 is connected with the S electrode of the field effect tube Q5; the G pole of the field effect tube Q3, the G pole of the field effect tube Q4, the G pole of the field effect tube Q5 and the G pole of the field effect tube Q6 are respectively connected with the SC8886 voltage conversion chip; the S electrode of the field effect transistor Q3 is connected with the S electrode of the field effect transistor Q6.

After the structure is adopted, the SC8886 voltage conversion chip controls the voltage rise and the voltage fall to control the voltage and the current of the input and the output, and when the power of the input end changes rapidly, the MCU 7 can control the SC8886 voltage conversion chip to quickly obtain the maximum power output of the output end and continuously maintain the maximum power. The pin 1 of the SC8886 voltage conversion chip is a power input end and is used for supplying power to the SC8886 voltage conversion chip and detecting input voltage; the

pins

16 and 17 of the SC8886 voltage conversion chip are used as loop voltage compensation and are connected with a peripheral circuit; the PIN23, PIN24, PIN26, PIN29, PIN31 and PIN32 of the SC8886 voltage conversion chip are respectively connected with synchronous power tubes (namely, a field effect tube Q3, a field effect tube Q4, a field effect tube Q5 and a field effect tube Q6), so that the current input quantity and the current output quantity of the tail end of a circuit can be increased, thereby meeting the requirement of high-power output and shortening the charging time of charging equipment.

Preferably, the input detection and filtering circuit 3 includes an input detection unit 30 and an input filtering unit 31, one end of the input filtering unit 31 is connected to the overvoltage protection unit 21, and the other end of the input filtering unit 31 is connected to the input detection unit 30.

Preferably, the input detection unit 30 includes a resistor R10, a resistor R11, a resistor R12, a capacitor C8, and a capacitor C9; one end of the resistor R10 is connected with the output end of the input filter unit 31, and the other end of the resistor R10 is connected with the D pole of the field effect transistor Q4; one end of the resistor R10 is connected with the 3 pin of the SC8886 voltage conversion chip through a resistor R11, and the other end of the resistor R10 is connected with the 2 pin of the SC8886 voltage conversion chip through a resistor R12; one end of the resistor R11 connected with the SC8886 voltage conversion chip is grounded through a capacitor C8; one end of the resistor R12 connected with the SC8886 voltage conversion chip is grounded through a capacitor C9.

After the structure is adopted, the SC8886 voltage conversion chip calculates the input current through detecting the voltage at two ends of the resistor R10 and the voltage difference between the two ends.

Preferably, the output detection and protection circuit 5 includes: the output detection unit 50 and the protection unit 51, wherein one end of the protection unit 51 is connected with the D pole of the field effect transistor Q5, and the other end of the protection unit 51 is connected with the output detection unit 50; the output detection unit 50 is connected with one end of the filter circuit 6;

the output detection unit 50 includes: resistor R19, resistor R20, resistor R21, and capacitor C22; the positive electrode of the resistor R19 is connected with the 20 pins of the SC8886 voltage conversion chip through a resistor R20; the negative electrode of the resistor R19 is connected with the 19 pin of the SC8886 voltage conversion chip through a resistor R21; a capacitor C22 is connected between the positive electrode of the resistor R20 and the positive electrode of the resistor R21.

After the structure is adopted, the SC8886 voltage conversion chip samples the output current by detecting the voltage drop of the resistor R19.

Specifically, the SC8886 voltage conversion chip detects input and output currents through the detection resistor R10 and the resistor R19, the SC8886 voltage conversion chip feeds back to the MCU 7 through the 12 pins and the 13 pins, and once the set value of the MCU 7 is exceeded, the MCU 7 can inform the SC8886 voltage conversion chip to turn off the fet Q7 in the output detection and protection circuit through the 12 pins and the 13 pins of the SC8886 voltage conversion chip.

The resistor R10 and the resistor R19 are used as sampling resistors for detecting input current and output current, have the function of limiting current and can protect elements.

Preferably, the input sampling unit 9 includes a capacitor C25 and a resistor R22, where the positive electrode of the resistor R22 is connected to the negative electrode of the resistor R10; the negative electrode of the resistor R22 is connected with the 1 pin of the SC8886 voltage conversion chip, and the negative electrode of the resistor R22 is grounded through a capacitor C25;

the output sampling unit 10 includes a capacitor C28, where one end of the capacitor C28 is grounded, and the other end of the capacitor C28 is connected to the pin 22 of the SC8886 voltage conversion chip and the D pole of the field-effect transistor Q5.

Preferably, the filter circuit 6 includes a capacitor C23 and a capacitor C24, where the capacitor C23 and the capacitor C24 are connected in parallel, one end of the capacitor C23 and one end of the capacitor C24 after being connected in parallel are connected to the negative electrode of the resistor R19, and the other end of the capacitor C23 and the other end of the capacitor C24 after being connected in parallel are grounded.

The SC8886 voltage conversion chip samples input and output voltages through a 1 pin and a 22 pin.

As shown in fig. 2 and 3, the MCU 7 is connected with

PINs

16 and 17 of the SC8886 voltage conversion chip through

PINs

3 and 4 to achieve the purpose of controlling the SC8886 voltage conversion chip; the SC8886 voltage conversion chip always outputs the maximum power through algorithm optimization, so that the highest charging efficiency is realized, the charging time is shortened, and the charging efficiency is improved; even in the case of variable weather, other electronic devices can be charged quickly through the output terminal.

The invention adopts MCU 7 to cooperate with PWM circuit 4 and automatic charging detection module to realize real-time intelligent control maximum power charging, greatly shortens user charging time, meets urgent need of user for electricity, and has strong universality and practicability.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is not intended to limit the scope of the claims herein, but it should be noted that modifications and equivalents of the inventive arrangements can be made by those skilled in the art without departing from the scope of the invention.

Claims

1. The solar energy storage control circuit is characterized by comprising a DC input circuit, an input protection circuit, an input detection and filter circuit, a PWM circuit for controlling output power, an MCU, an output detection and protection circuit, a filter circuit, an automatic charge detection module and a battery; the DC input circuit, the input protection circuit, the input detection and filter circuit, the PWM circuit, the output detection and protection circuit, the filter circuit and the battery are sequentially connected, and the MCU is respectively connected with the PWM circuit and the battery; the automatic charging detection module comprises an input sampling unit for sampling input current and an output sampling unit for sampling output current, wherein the input sampling unit is connected between the PWM circuit and the input detection and filtering circuit, and the output sampling unit is connected between the PWM circuit and the output detection and protection circuit;

the input protection circuit comprises an anti-reverse connection unit for preventing reverse connection and an overvoltage protection unit for preventing excessive input voltage, wherein the anti-reverse connection unit is connected with the overvoltage protection unit;

the anti-reverse connection unit comprises a field effect tube Q2, a resistor R8 and a resistor R9, wherein the D electrode of the field effect tube Q2 is connected with the negative electrode of the DC input circuit, the G electrode of the field effect tube Q2 is connected with the positive electrode of the DC input circuit through the resistor R8, and the S electrode of the field effect tube Q2 is connected between the G electrode of the field effect tube Q2 and the resistor R8 through the resistor R9;

the overvoltage protection unit comprises a voltage stabilizing diode ZV1, a voltage stabilizing diode TVS1, a triode Q9, a field effect transistor Q11, a field effect transistor Q10, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R40 and a resistor R41; the positive electrode of the voltage stabilizing diode ZV1 is connected with the S electrode of the field effect tube Q2, the negative electrode of the voltage stabilizing diode ZV1 is connected with the triode Q9 through a resistor R37 and a resistor R36 respectively, and the triode Q9 is connected with the G electrode of the field effect tube Q10 through a resistor R38; the G pole of the field effect tube Q10 is connected with the positive pole of the zener diode ZV1 and the S pole of the field effect tube Q2 through a resistor R39; the S electrode of the field effect tube Q10 is respectively connected with the S electrode of the field effect tube Q11 and the S electrode of the field effect tube Q11; the D pole of the field effect tube Q10 is connected with the S pole of the field effect tube Q11 through a resistor 41, and the D pole of the field effect tube Q10 is connected with the cathode of the voltage stabilizing diode TVS1 through a resistor R40; the positive electrode of the voltage stabilizing diode TVS1 is connected with the D electrode of the field effect transistor Q11, and the G electrode of the field effect transistor Q11 is connected between the resistor R40 and the resistor R41;

the PWM circuit comprises an SC8886 voltage conversion chip, an inductor L1, a field effect transistor Q3, a field effect transistor Q4, a field effect transistor Q5 and a field effect transistor Q6; the D electrode of the field effect tube Q3 is connected with the D electrode of the field effect tube Q6 through an inductor L1, the D electrode of the field effect tube Q3 is connected with the S electrode of the field effect tube Q4, and the D electrode of the field effect tube Q6 is connected with the S electrode of the field effect tube Q5; the G pole of the field effect tube Q3, the G pole of the field effect tube Q4, the G pole of the field effect tube Q5 and the G pole of the field effect tube Q6 are respectively connected with the SC8886 voltage conversion chip; the S electrode of the field effect tube Q3 is connected with the S electrode of the field effect tube Q6, and the MCU 7 is connected with the PINs 16 and 17 of the SC8886 voltage conversion chip through the PIN3 and the PIN4 to achieve the purpose of controlling the SC8886 voltage conversion chip; and the SC8886 voltage conversion chip can always output the maximum power through algorithm optimization.

2. The solar energy storage control circuit according to claim 1, wherein the input detection and filtering circuit comprises an input detection unit and an input filtering unit, one end of the input filtering unit is connected with the overvoltage protection unit, and the other end of the input filtering unit is connected with the input detection unit.

3. The solar energy storage control circuit of claim 2, wherein the input detection unit comprises a resistor R10, a resistor R11, a resistor R12, a capacitor C8, and a capacitor C9; one end of the resistor R10 is connected with the output end of the input filtering unit, and the other end of the resistor R10 is connected with the D pole of the field effect transistor Q4; one end of the resistor R10 is connected with the 3 pin of the SC8886 voltage conversion chip through a resistor R11, and the other end of the resistor R10 is connected with the 2 pin of the SC8886 voltage conversion chip through a resistor R12; one end of the resistor R11 connected with the SC8886 voltage conversion chip is grounded through a capacitor C8; one end of the resistor R12 connected with the SC8886 voltage conversion chip is grounded through a capacitor C9.

4. The solar energy storage control circuit of claim 2, wherein the output detection and protection circuit comprises: the device comprises an output detection unit and a protection unit, wherein one end of the protection unit is connected with the D electrode of the field effect transistor Q5, and the other end of the protection unit is connected with the output detection unit; the output detection unit is connected with one end of the filter circuit;

5. The solar energy storage control circuit according to claim 4, wherein the input sampling unit comprises a capacitor C25 and a resistor R22, and the positive electrode of the resistor R22 is connected with the negative electrode of the resistor R10; the negative electrode of the resistor R22 is connected with the 1 pin of the SC8886 voltage conversion chip, and the negative electrode of the resistor R22 is grounded through a capacitor C25;

6. The solar energy storage control circuit according to claim 4, wherein the filter circuit comprises a capacitor C23 and a capacitor C24, the capacitor C23 and the capacitor C24 are connected in parallel, one end of the capacitor C23 and one end of the capacitor C24 are connected with the negative electrode of the resistor R19 after being connected in parallel, and the other end of the capacitor C23 and the other end of the capacitor C24 after being connected in parallel are grounded.