CN114336861B - Control circuit of solar power generation device - Google Patents
Control circuit of solar power generation device Download PDFInfo
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- CN114336861B CN114336861B CN202111661836.2A CN202111661836A CN114336861B CN 114336861 B CN114336861 B CN 114336861B CN 202111661836 A CN202111661836 A CN 202111661836A CN 114336861 B CN114336861 B CN 114336861B
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Abstract
The invention discloses a control circuit of a solar power generation device, which comprises: the solar energy power supply circuit comprises a solar energy electric plate, a charging control circuit, a power supply circuit, a buzzer alarm circuit, a MOS tube trigger circuit, a charging relay control circuit and an MCU circuit; the solar panel, the charging control circuit and the power supply circuit are electrically connected in sequence; the power supply circuit supplies power for the buzzer alarm circuit, the MOS tube trigger circuit, the charging relay control circuit and the MCU circuit; the MCU circuit is electrically connected with the charging control circuit, the buzzer alarm circuit, the MOS tube trigger circuit and the charging relay control circuit; the charging control circuit comprises a battery BT1, a relay contact JDQ1B, MOS tube Q5, a diode D2 and a high-voltage optocoupler U3; the charging relay control circuit comprises a relay coil JDQ1A and a triode Q4; the relay contact JDQ1B, MOS tube Q5 and the high-voltage optocoupler U3 are all controlled to be in an off state by an MCU circuit before charging. The invention can ensure that the battery is reversely connected and cannot cause faults.
Description
Technical Field
The present disclosure relates to control circuits, and particularly to a control circuit for a solar power generation device.
Background
The solar power generation device is widely used because the solar power generation device can convert solar energy into electric energy, and is energy-saving and environment-friendly.
However, in the process of developing the technology, the inventor discovers that the technology at least has the following technical problems:
If the battery is reversely connected, the control circuit of the existing solar power generation device is easy to fail, and after key elements in the charging control circuit fail, the system cannot self-detect and alarm, so that various potential safety hazards exist during use, and special care is needed.
Disclosure of Invention
The invention aims to solve the problems existing in the prior art and provides a control circuit of a solar power generation device.
The technical scheme for realizing the purpose of the invention is a control circuit of a solar power generation device, which comprises: the solar energy power supply circuit comprises a solar energy electric plate, a charging control circuit, a power supply circuit, a buzzer alarm circuit, a MOS tube trigger circuit, a charging relay control circuit and an MCU circuit; the solar panel, the charging control circuit and the power supply circuit are electrically connected in sequence; the power supply circuit supplies power for the buzzer alarm circuit, the MOS tube trigger circuit, the charging relay control circuit and the MCU circuit; the MCU circuit is electrically connected with the charging control circuit, the buzzer alarm circuit, the MOS tube trigger circuit and the charging relay control circuit; the charging control circuit comprises a battery BT1, a relay contact JDQ1B, MOS tube Q5, a diode D2 and a high-voltage optocoupler U3; the charging relay control circuit comprises a relay coil JDQ1A and a triode Q4; the relay contact JDQ1B, MOS tube Q5 and the high-voltage optocoupler U3 are all controlled to be in an off state by an MCU circuit before charging.
The battery BT1 is connected between the cathode of the diode D2 and the drain electrode of the MOS tube Q5; the relay contact JDQ1B is arranged between the positive electrode output end of the solar panel and the positive electrode of the diode D2; the grid electrode of the MOS tube Q5 is connected to the MOS tube trigger circuit, the source electrode is connected to the MCU circuit, and the source electrode serial resistor R11 is grounded; the high-voltage optocoupler U3 is arranged between the drain electrode of the MOS tube Q5 and the MUC circuit; the relay coil JDQ1A is arranged between the power supply circuit and the collector electrode of the triode Q4; the base electrode of the triode Q4 is connected to the MUC circuit, and the emitter electrode is grounded.
The MCU circuit comprises an MCU chip U6 and a voltage stabilizer U4; the voltage stabilizer U4 is connected with the MCU chip U6.
The charging control circuit further comprises a resistor R3, a resistor R4, a resistor R5, an optocoupler U2, a high-voltage optocoupler U3 and a diode D3; the resistor R3 is connected between the cathode of the diode D2 and the optocoupler U2; the resistor R4 is connected between the power supply and the optical coupler U2 and is connected with the MCU chip U6; the resistor R5 is connected between the power supply and the high-voltage thermocouple U3; the negative electrode of the diode D3 is connected with the drain electrode of the MOS tube Q5, and the positive electrode of the diode D3 is connected with the high-voltage thermocouple U3.
The charging control circuit further comprises a diode D1, a resistor R8 and a resistor R9; the positive pole of diode D1 is connected with the negative pole of diode D2, the positive pole of battery BT1, and the negative pole series resistance R8 of diode D1, resistance R9 ground behind, and the tie point of resistance R8 and resistance R9 is connected to MCU chip U6 simultaneously.
The charging control circuit further comprises a resistor R2 and a resistor R7; the resistor R2 and the resistor R7 are connected in series between the anode of the diode D2 and the ground, and meanwhile, the connection point of the resistor R2 and the resistor R7 is connected to the MCU chip U6.
The charging control circuit further comprises a resistor R11; the resistor R11 is connected between the source electrode of the MOS tube Q5 and the ground, and meanwhile, the connection point of the resistor R11 and the source electrode of the MOS tube Q5 is connected to the MCU chip U6.
The model of the MCU chip U6 is HT66F3185.
Further, the display circuit is also included; the display circuit is powered by the power supply circuit and is connected with the MCU circuit.
After the technical scheme is adopted, the invention has the positive effects that: (1) The relay contact and the MOS tube are not communicated when the charging is not started, and the high-voltage couple is controlled to be in a disconnected state by the MCU chip before the charging is not started, so that even if the battery is reversely connected at the beginning, the relay contact and the MOS tube do not form a loop with any element, and the battery cannot be broken even if the battery is reversely connected.
(2) The invention sets a circuit capable of automatically detecting the battery wiring error in the charging control circuit, the wiring error gives a warning prompt, and the discharging phenomenon of the battery is not caused.
(3) The circuit can realize automatic power-off when the electric quantity of the battery is full, thereby protecting the battery from overcharge.
(4) The invention can ensure that the battery is not discharged even if the battery is charged by incorrect connection when the solar panel is not opened or the power generation is insufficient and the battery cannot be charged.
(5) The invention adopts the double-switch circuit, can automatically detect and alarm when any one is damaged, and simultaneously, the relay contact is disconnected when the battery is not charged, and the MOS tube is closed, so that the battery has no discharge loop and no self-discharge phenomenon when the battery is not charged.
(6) The solar energy power supply device can automatically detect the output voltage of the solar energy power panel, and automatically connect and charge the solar energy power panel after the output voltage reaches a proper voltage.
(7) When the relay provided by the invention has faults, the diode can effectively protect the battery from discharging through the solar panel.
(8) When the MOS tube of the invention fails, the MCU automatically detects and alarms.
(9) The invention is also provided with a diode fault automatic detection circuit which can give an alarm and prompt.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
Fig. 1 is a schematic block diagram of the circuit of the present invention.
Fig. 2 is a circuit diagram of a solar panel and a charge control circuit portion of the present invention.
Fig. 3 is a circuit diagram of the power supply circuit, the buzzer alarm circuit and the MOS transistor trigger circuit portion of the present invention.
Fig. 4 is a circuit diagram of the MCU circuit and the charging relay control circuit part of the present invention.
Fig. 5 is a circuit diagram of a display circuit portion of the present invention.
The reference numerals in the drawings are:
The solar energy power supply device comprises a solar energy electric plate 1, a charging control circuit 2, a power supply circuit 3, a buzzer alarm circuit 4, a MOS tube trigger circuit 5, a charging relay control circuit 6, an MCU circuit 7 and a display circuit 8.
Detailed Description
Example 1
Referring to fig. 1, a schematic block diagram of a control circuit of a solar power generation device is shown in fig. 1, including: the solar energy power supply circuit comprises a solar energy electric plate 1, a charging control circuit 2, a power supply circuit 3, a buzzer alarm circuit 4, a MOS tube trigger circuit 5, a charging relay control circuit 6, an MCU circuit 7 and a display circuit 8.
The solar panel 1, the charging control circuit 2 and the power circuit 3 are electrically connected in sequence; the power supply circuit 3 converts the output voltage of the solar panel 1 into stable 12V direct current, and provides power for the buzzer alarm circuit 4, the MOS tube trigger circuit 5, the charging relay control circuit 6, the MCU circuit 7 and the display circuit 8, so that all the circuits work stably. The MCU circuit 7 is electrically connected with the charging control circuit 2, the buzzer alarm circuit 4, the MOS tube trigger circuit 5, the charging relay control circuit 6 and the display circuit 8 and is used for controlling all the circuits.
Referring to fig. 4, the MCU circuit 6 includes an MCU chip U6, a voltage regulator U4 (model 78L05, which is a three-terminal integrated voltage regulator), and a capacitor C8 and a capacitor C9; the voltage stabilizer U4 is connected with the MCU chip U6. The MCU chip U6 is HT66F3185, and has 24 pins. The 3 pin of the voltage stabilizer U4 is connected with +12V voltage, the 1 pin of the voltage stabilizer U4 outputs 5V (VCC) power, and is connected with the 24 pin of the MCU chip U6, and meanwhile, the series capacitor C9 is grounded; the 2 feet of the voltage stabilizer U4 are grounded, and the 3 feet are connected with the capacitor C8 in series and then grounded. And 1 pin of the MCU chip U6 is grounded, and the other 22 pins are connected with other circuits. The charging relay control circuit 6 includes a resistor R20, a resistor R21, a transistor Q4, a diode D4, and a relay coil JDQ1A. One end of the resistor R20 is connected with the 18 pin of the MCU chip U6, and the other end is connected with the base electrode of the triode Q4. The emitter of the triode Q4 is grounded, and the collector is connected with the relay coil JDQ1A. Resistor R21 is connected between the base of transistor Q4 and ground. The relay coil JDQ1A is connected between +12v dc power output from the power supply circuit 3 and the collector of the transistor Q4. The diode D4 is connected in parallel with the relay coil JDQ1A.
Referring to fig. 5, the display circuit 8 includes a digital display tube, resistors R12 to R19, and light emitting diodes D10 to D13. The resistor R12 is connected between the 3 pin of the digital display tube and the 19 pin of the MCU chip U6; the resistor R13 is connected between the pin 5 of the digital display tube and the pin 17 of the MCU chip U6; the resistor R14 is connected between the 10 pins of the digital display tube and the 16 pins of the MCU chip U6; the resistor R15 is connected between the pin 1 of the digital display tube and the pin 15 of the MCU chip U6; the resistor R16 is connected between the pin 2 of the digital display tube and the pin 14 of the MCU chip U6; the resistor R17 is connected between the pin 4 of the digital display tube and the pin 13 of the MCU chip U6; the resistor R18 is connected between the pin 7 of the digital display tube and the pin 12 of the MCU chip U6; the resistor R19 is connected between the 11 pin of the digital display tube and the 11 pin of the MCU chip U6; the 12 feet of the digital display tube are connected with the 6 feet of the MCU chip U6, the 9 feet are connected with the 7 feet of the MCU chip U6, and the 8 feet are connected with the 8 feet of the MCU chip U6. The anodes of the light emitting diodes D10, D11, D12 and D13 are respectively connected with the 2 pin, the 4 pin, the 7 pin and the 11 pin of the digital display tube, and the cathodes of the light emitting diodes D10, D11, D12 and D13 are respectively connected with the 9 pin of the MCU chip U6.
Referring to fig. 3, the power supply circuit 3 is connected to the solar panel 1 through a diode D5, while the anode of the diode D5 is also connected to a relay contact JDQ1B in the charge control circuit 2; the power circuit 3 comprises a DC-DC isolation converter chip U5 (model PN 6380); the +12V direct current output by the power supply circuit 3 is supplied to the buzzer alarm circuit 4, the MOS tube trigger circuit 5 and the charging relay control circuit 6. The buzzer alarm circuit 4 includes a +12v dc output connected to the power supply circuit 3 through a resistor R25, a buzzer SP1, a transistor Q2, a resistor R27, and a resistor R36. The base electrode of the triode Q2 is connected to the intersection point of the resistor R27 and the resistor R36, the emitter electrode is grounded, the collector electrode is connected to the buzzer SP1 through the resistor R26, and the resistor R27 is connected with the 2 pin of the MCU chip U6. The MOS transistor trigger circuit 5 comprises a triode Q1, a triode Q6, a triode Q3, a resistor R28, a resistor R29 and a resistor R37. The base electrode of the triode Q1 is connected with one end of a resistor R29, the emitter electrode of the triode Q6 is connected with the emitter electrode of the triode Q6, and the collector electrode of the triode Q1 is connected to the +12V direct current output end of the power supply circuit 3; the base electrode of the triode Q6 is connected with one end of a resistor R29, and the collector electrode is grounded; the base electrode of the triode Q3 is connected with the 3 pin of the MCU chip U6 through a resistor R37, the emitter electrode is grounded, and the base electrode of the collector electrode is connected with one end of a resistor R29. The other end of the resistor R29 is connected to the +12V direct current output end of the power circuit 3; one end of the resistor R28 is connected to the intersection of the triode Q1 and the triode Q6, and the other end is connected to the grid electrode of the MOS tube Q5 of the charging control circuit 2.
Referring to fig. 2, the 1 pin of the solar panel 1 is connected to the charging control circuit 2, and the 2 pin is grounded. The key circuit of the present embodiment is a charging control circuit 2, specifically, the charging control circuit 2 includes a battery BT1, a relay contact JDQ1B, MOS tube Q5, a diode D1, a diode D2, a diode D3, an optocoupler U2, a high-voltage optocoupler U3, and resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11. The relay contact JDQ1B, MOS, the Q5 and the high-voltage optocoupler U3 are all controlled to be in an off state by the MCU circuit 7 before charging.
Specifically, the battery BT1 is connected between the cathode of the diode D2 and the drain of the MOS transistor Q5; the relay contact JDQ1B is arranged between the positive electrode output end of the solar panel 1 and the positive electrode of the diode D2; the anode of the diode D2 is connected with the resistor R2 and the resistor R7 in series and then grounded, and meanwhile, the intersection point of the resistor R2 and the resistor R7 is connected to the 22 pin of the MCU chip U6; the cathode of the diode D2 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the resistor R8 and the resistor R9 in series and then grounded, and meanwhile, the intersection point of the resistor R8 and the resistor R9 is connected to the 21 pin of the MCU chip U6. The grid electrode of the MOS tube Q5 is connected with a resistor R28 of the MOS tube trigger circuit, and the grid electrode is grounded through a resistor R10; the source is connected to pin 20 of MCU chip U6, while the source is grounded through resistor R11. The diode D3 is arranged between the high-voltage optocoupler U3 and the drain electrode of the MOS tube Q5, the high-voltage optocoupler U3 is connected with the 5 pin of the MCU chip U6, and meanwhile, the high-voltage optocoupler U3 is connected with the optocoupler U2 and the power supply VCC. The resistor R3 is connected between the cathode of the diode D2 and the optical coupler U2; the resistor R4 is connected between the power supply and the optical coupler U2 and is connected with the pin 4 of the MCU chip U6; resistor R5 is connected between power supply VCC and high voltage optocoupler U3. The resistor R1 and the resistor R6 are connected in series, one end of the resistor R1 is connected with the 1 pin of the solar panel 1, one end of the resistor R6 is grounded, and meanwhile, the intersection point of the resistor R1 and the resistor R6 is connected to the 23 pin of the MCU chip U6.
The control circuit of the solar power generation device of the embodiment works as follows:
The relay contact JDQ1B and the MOS transistor Q5 are not both communicated when charging is not started, and the high-voltage thermocouple U3 is controlled to be in an off state by the 5 pin BATTER _JC_CNT of the MCU chip U6 before charging is not started, so that even if the battery is reversely connected at the beginning, the battery does not form a loop with any element, and therefore, the battery cannot be broken even if the battery is reversely connected.
The charging control circuit is provided with a circuit capable of automatically detecting battery wiring errors, the circuit consists of R3, R4 and R5, a light couple U2, a high-voltage light couple U3 and a diode D3, when the solar panel 1 is opened, the output voltage of the solar panel 1 is converted into stable 12V voltage through the power supply circuit 3 and is transmitted to the MCU circuit 7, when the MCU circuit 7 starts to work after being electrified, the BATTER _JC_CNT is firstly output to be low level, the BATTER _XH signal is detected, when the BATTER _XH signal is low level, the positive electrode and the negative electrode of the battery BT1 are correctly wired, and when the BATTER _XH is high level, the positive electrode and the negative electrode of the battery BT1 are reversely connected or the battery BT1 is not connected, and at the moment, the buzzer SP1 sounds a warning prompt and simultaneously outputs an error code through the display circuit 8. Meanwhile, when the solar panel 1 does not output, the MCU circuit 7 does not work, the high-voltage photo U3 is in an off state, and a discharging loop formed by the resistor R3, the photo coupler U2 and the diode D3 is disconnected by the high-voltage photo U3, so that a circuit for automatically detecting the wiring error of the battery does not cause the discharging phenomenon of the battery. The diode D1 in the charging control circuit 2 takes the voltage of the battery BT1, the BATTER _V is obtained by dividing the voltage through the resistor R8 and the resistor R9, the signal is sent to the 21 pin of the MCU chip U6, and the MCU chip U6 measures and judges the voltage; when the voltage of the battery BT1 reaches the state of full battery, the MCU chip U6 outputs RELAY_CNT signals (18 feet) to control the charging RELAY coil JDQ1A through the charging RELAY control circuit 6, so that the RELAY contact JDQ1B in the charging control circuit 2 is disconnected with the diode D2 (such as the non-charging state in FIG. 2); meanwhile, the 3 pin of the MCU chip U6 outputs a CMOS_CNT signal with 0 level, and the MOS transistor trigger circuit 5 controls the MOS transistor Q5 to disconnect from the battery BT1, so that the purposes of fully automatic power-off and battery overcharge protection are achieved.
When the solar electric plate 1 is retracted, the solar electric plate 1 does not output, the power circuit 3 does not output stable 12V voltage, the MCU circuit 7 does not work, the relay contact JDQ1B is in an off state, and the MOS tube Q5 is in an off state, so that the battery BT1 is not discharged; when the output voltage of the solar panel 1 is insufficient, the MCU circuit 7 detects the voltage of the battery BT1 in real time through the diode D1, the resistor R8 and the resistor R9, and detects the output voltage of the solar panel 1 in real time through the resistor R1 and the resistor R6 to obtain the voltage SUN_VA (the 23 pin connected to the MCU chip U6), so the MCU chip U6 can judge whether the output voltage of the solar panel can charge the battery BT1 in real time, and when the charging voltage of the battery BT1 is not reached, the MCU chip U6 controls the relay contact JDQ1B to be always turned off, and the MOS tube Q5 is always in a closed state. Therefore, the situation that the battery cannot be charged due to misconnection is avoided when the solar panel is retracted or the solar panel does not generate enough power, and the battery cannot be discharged.
When the contact of the relay contact JDQ1B cannot be connected to D2 correctly, the resistors R2, R7 cannot obtain the voltage due to the effect of the diode D2, and the voltage sun_vb is always 0V at this time, so that the abnormality of the relay contact JDQ1B can be detected immediately, the buzzer SP1 outputs an alarm, and the display circuit 8 outputs an error prompt code. When the relay contact JDQ1B cannot be disconnected from D2 (refer to that although the relay coil JDQ1A is powered off, the relay contact JDQ1B cannot be disconnected, indicating a fault of the disconnection), the resistor R2 and the resistor R7 take sun_vb always with a stable voltage, and the buzzer SP1 outputs an alarm, and the display circuit 8 outputs an error prompt code. Therefore, the battery BT1 is charged and controlled by adopting a double-switch circuit of the relay and the MOS tube Q5, and when one switch is damaged, the battery BT can be automatically detected and the buzzer alarms and prompts.
When the MOS tube Q5 is damaged and in a short circuit state, as long as the relay contact JDQ1B is connected to the diode D2, when the MOS tube Q5 has no trigger signal, charging current immediately exists, the MOS tube Q5 can be judged to be damaged and in the short circuit state by detecting the BATTER _ CURT signal on the resistor R11 through the pin 22 of the MCU chip U6, otherwise, when the MOS tube Q5 is in the open circuit state due to the fault, the relay contact JDQ1B is connected to the diode D2, the trigger signal CMOS_CNT of the MOS tube Q5 is given by the pin 3 of the MCU chip U6 through the MOS tube trigger circuit 5, but when the BATTER _ CURT signal on the resistor R11 is always 0, namely the MOS tube Q5 is in the open circuit state, the buzzer SP1 alarms and outputs an error prompt code on the display circuit 8.
MCU chip U6 is through relay JDQ1 and MOS pipe Q5 double switch control, and relay contact JDQ1B opens when not charging, and MOS pipe Q5 closes and makes battery BT1 no discharge loop, so does not have the self discharge phenomenon when not charging. Since the voltage of the battery BT1 is taken by the diode D1, BATTER _V is obtained after the voltage of the resistors R8 and R9 is divided, and the MCU chip U6 detects the voltage in real time, the voltage of the battery BT1 can be automatically detected when the battery BT1 is charged, and the MOS tube Q5 is in a closed state when the battery BT1 is not charged, so that the diode D1, the resistor R8 and the resistor R9 and the battery do not form a loop, and no self-discharge phenomenon exists when the battery BT1 is not charged.
The MCU chip U6 detects the voltage of the solar panel in real time through SUN_VA of the voltages of R1 and R6, and detects the voltage of the battery in real time through BATTER _V obtained by the diode D1, the resistor R8 and the resistor R9 to judge whether the voltage of the solar panel 1 is suitable for charging the battery, and when the battery can be charged, the control relay contact JDQ1B is connected to the diode D2, and meanwhile, the MOS tube Q5 is controlled to be conducted for charging. Thereby realizing automatic detection of the output voltage of the solar panel and achieving proper voltage automatic connection charging.
When the relay is in a state of being disconnected but cannot be disconnected when the relay is connected with the D2, and the MOS tube is in a state of being in a short circuit when the relay is in a state of being disconnected, the diode D2 can effectively protect the battery BT1 from discharging through the solar panel 1.
When the diode D2 is in fault and is in short circuit, the relay contact JDQ1B is not connected to the diode D2, after the MOS tube Q5 is opened, the MCU chip U6 can judge whether the diode D2 is in short circuit or not through measuring the SUN_VB voltage obtained by the resistor R2 and the resistor R7, and when the SUN_VB voltage is in short circuit, the SUN_VB voltage is not in short circuit. Thereby realizing the automatic detection of the fault of the diode D2 and the alarm prompt of the buzzer.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (5)
1. A control circuit of a solar power generation device, characterized by comprising: the solar energy power supply device comprises a solar energy electric plate (1), a charging control circuit (2), a power supply circuit (3), a buzzer alarm circuit (4), a MOS tube trigger circuit (5), a charging relay control circuit (6) and an MCU circuit (7); the solar energy power supply device comprises a solar energy electric plate (1), a charging control circuit (2) and a power supply circuit (3), wherein the solar energy electric plate, the charging control circuit and the power supply circuit are electrically connected in sequence; the power supply circuit (3) is used for supplying power to the buzzer alarm circuit (4), the MOS tube trigger circuit (5), the charging relay control circuit (6) and the MCU circuit (7); the MCU circuit (7) is electrically connected with the charging control circuit (2), the buzzer alarm circuit (4), the MOS tube trigger circuit (5) and the charging relay control circuit (6); the charging control circuit (2) comprises a battery BT1, a relay contact JDQ1B, MOS tube Q5, a diode D2 and a high-voltage optocoupler U3; the charging relay control circuit (6) comprises a relay coil JDQ1A and a triode Q4; the relay contact JDQ1B, MOS tube Q5 and the high-voltage optocoupler U3 are all controlled to be in an off state by an MCU circuit (7) before charging; the battery BT1 is connected between the cathode of the diode D2 and the drain electrode of the MOS tube Q5; the relay contact JDQ1B is arranged between the positive electrode output end of the solar panel and the positive electrode of the diode D2; the grid electrode of the MOS tube Q5 is connected to the MOS tube trigger circuit (5) and the source electrode is connected to the MCU circuit (7), and meanwhile, the source electrode serial resistor R11 is grounded; the high-voltage optocoupler U3 is arranged between the drain electrode of the MOS tube Q5 and the MCU circuit (7); the relay coil JDQ1A is arranged between the power supply circuit and the collector electrode of the triode Q4; the base electrode of the triode Q4 is connected to an MCU circuit (7), and the emitter electrode is grounded; the MCU circuit (7) comprises an MCU chip U6 and a voltage stabilizer U4; the voltage stabilizer U4 is connected with the MCU chip U6; the charging control circuit (2) further comprises a resistor R3, a resistor R4, a resistor R5, an optocoupler U2, a high-voltage optocoupler U3 and a diode D3; the resistor R3 is connected between the cathode of the diode D2 and the optocoupler U2; the resistor R4 is connected between the power supply and the optical coupler U2 and is connected with the MCU chip U6; the resistor R5 is connected between the power supply and the high-voltage thermocouple U3; the cathode of the diode D3 is connected with the drain electrode of the MOS tube Q5, and the anode of the diode D3 is connected with the high-voltage optocoupler U3; the charging control circuit (2) further comprises a diode D1, a resistor R8 and a resistor R9; the positive pole of diode D1 is connected with the negative pole of diode D2, the positive pole of battery BT1, and the negative pole series resistance R8 of diode D1, resistance R9 ground behind, and the tie point of resistance R8 and resistance R9 is connected to MCU chip U6 simultaneously.
2. The control circuit of a solar power generation device according to claim 1, wherein: the charging control circuit (2) further comprises a resistor R2 and a resistor R7; the resistor R2 and the resistor R7 are connected in series between the anode of the diode D2 and the ground, and meanwhile, the connection point of the resistor R2 and the resistor R7 is connected to the MCU chip U6.
3. A control circuit for a solar power plant according to claim 2, wherein: the charging control circuit (2) further comprises a resistor R11; the resistor R11 is connected between the source electrode of the MOS tube Q5 and the ground, and meanwhile, the connection point of the resistor R11 and the source electrode of the MOS tube Q5 is connected to the MCU chip U6.
4. A control circuit for a solar power plant according to any one of claims 1-3, characterized in that: the model of the MCU chip U6 is HT66F3185.
5. The control circuit of a solar power generation device according to claim 4, wherein: also comprises a display circuit (8); the display circuit (8) is powered by the power supply circuit (3) and is connected with the MCU circuit (7).
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| CN202111661836.2A CN114336861B (en) | 2021-12-31 | 2021-12-31 | Control circuit of solar power generation device |
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| CN202111661836.2A CN114336861B (en) | 2021-12-31 | 2021-12-31 | Control circuit of solar power generation device |
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| CN114336861B true CN114336861B (en) | 2024-06-11 |
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| CN201975841U (en) * | 2011-04-02 | 2011-09-14 | 刘举柱 | Multifunctional intelligent charger |
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| CN203398769U (en) * | 2013-06-17 | 2014-01-15 | 许继电气股份有限公司 | Battery reverse-connection resistant protective circuit of direct current charging pile controller |
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|---|---|
| CN114336861A (en) | 2022-04-12 |
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