CN109066952B - Low-self-consumption control circuit, solar controller and solar power generation system - Google Patents
Low-self-consumption control circuit, solar controller and solar power generation system Download PDFInfo
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- CN109066952B CN109066952B CN201811011344.7A CN201811011344A CN109066952B CN 109066952 B CN109066952 B CN 109066952B CN 201811011344 A CN201811011344 A CN 201811011344A CN 109066952 B CN109066952 B CN 109066952B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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Abstract
The embodiment of the invention relates to the technical field of solar power supply, and discloses a low-self-consumption control circuit, a solar controller and a solar power generation system. The low self-consumption control circuit comprises: the voltage detection circuit is used for being connected with an energy storage battery of the solar controller, detecting the voltage of the energy storage battery, outputting a first electric signal when the voltage of the energy storage battery is higher than a preset threshold value, and outputting a second electric signal when the voltage of the energy storage battery is lower than the preset threshold value; and the power supply circuit is connected with the voltage detection circuit and used for controlling the control circuit of the solar controller to be in a dormant state according to the first electric signal and controlling the control circuit of the solar controller to be in a working state according to the second electric signal. Through the mode, the self-power consumption of the solar controller can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of solar power supply, in particular to a low-self-consumption control circuit, a solar controller and a solar power generation system.
Background
In a solar power generation system, a solar controller is used for controlling a multi-path solar cell array to charge an energy storage cell and controlling the energy storage cell to supply power to a solar inverter load. The solar controller regulates and controls the charging and discharging conditions of the energy storage battery, controls the solar battery assembly and the energy storage battery to output the electric energy of the load according to the power supply requirement of the load, and is a core control part of the whole solar power generation.
The inventor finds that when a user encounters continuous rainy days to enable the solar panel to be incapable of charging, the solar controller cuts off output, but the solar controller consumes power automatically, so that the electric quantity of the energy storage battery is still consumed continuously, the energy storage battery is easy to be over-discharged, and the energy storage battery is damaged.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a low power consumption control circuit, a solar controller, and a solar power generation system, which can effectively reduce the power consumption of the solar controller.
In order to achieve the above purpose, the embodiment of the invention discloses the following technical scheme:
the invention provides a low-self-consumption control circuit, which comprises: the voltage detection circuit is used for being connected with an energy storage battery of the solar controller, detecting the voltage of the energy storage battery, outputting a first electric signal when the voltage of the energy storage battery is higher than a preset threshold value, and outputting a second electric signal when the voltage of the energy storage battery is lower than the preset threshold value; and the power supply circuit is connected with the voltage detection circuit and used for controlling the control circuit of the solar controller to be in a working state according to the first electric signal and controlling the control circuit of the solar controller to be in a dormant state according to the second electric signal.
In some embodiments, the voltage detection circuit comprises a first voltage interface, a second voltage interface, a first resistor, a second resistor, a third resistor, a first voltage regulator tube and an operational amplifier; one end of the first resistor is connected with the first voltage interface, the other end of the first resistor is connected with the inverting input end of the operational amplifier, one end of the second resistor is connected with the inverting input end of the operational amplifier, the other end of the second resistor is connected with the second voltage interface, one end of the third resistor is connected with the first voltage interface, the other end of the third resistor is connected with the non-inverting input end of the operational amplifier, the negative end of the first voltage-stabilizing tube is connected with the non-inverting input end of the operational amplifier, the positive end of the first voltage-stabilizing tube is connected with the second voltage interface, the positive power supply end of the operational amplifier is connected with the first voltage interface, the negative power supply end of the operational amplifier is connected with the second voltage interface, and the output end of the operational amplifier is used for being connected with the power supply circuit; the first voltage interface is used for being connected with a voltage anode of the energy storage battery, and the second voltage interface is used for being connected with a voltage cathode of the energy storage battery.
In some embodiments, the power supply circuit comprises a third voltage interface, a fourth voltage interface, a first diode, a fourth resistor, a fifth resistor, a first triode, a second voltage regulator tube, a first capacitor, a second capacitor and a control chip; the positive electrode end of the first diode is used for being connected with the voltage detection circuit, one end of the fourth resistor is connected with the positive electrode end of the first diode, the other end of the fourth resistor is connected with the voltage detection circuit, the negative electrode end of the first diode is connected with the base electrode end of the first triode, the emitter electrode end of the first triode is connected with the voltage detection circuit, the collector electrode end of the first triode is connected with one end of the fifth resistor, the other end of the fifth resistor is connected with the other end of the fourth resistor, the base electrode end of the second triode is connected with the collector electrode end of the first triode, the collector electrode end of the second triode is connected with the other end of the fourth resistor, the emitter electrode of the second triode is connected with the input end of the control chip, and the positive electrode end of the second voltage stabilizing tube is connected with the emitter electrode end of the first triode, the negative end of the second voltage-regulator tube is connected with the base end of the second triode, the output end of the control chip is connected with the third voltage interface, the grounding end of the control chip is connected with the emitter end of the first triode, the fourth voltage interface is connected with the emitter end of the first triode, one end of the first capacitor is connected with the input end of the control chip, the other end of the first capacitor is connected with the emitter end of the first triode, one end of the second capacitor is connected with the third voltage interface, and the other end of the second capacitor is connected with the fourth voltage interface; the third voltage interface is used for being connected with a voltage anode of the control circuit, and the fourth voltage interface is used for being connected with a voltage cathode of the control circuit.
In some embodiments, the low power consumption control circuit further comprises: and the power supply wake-up circuit is connected with the power supply circuit and used for detecting whether the solar panel of the solar controller meets the charging requirement when the control circuit is in the dormant state, and controlling the control circuit to enter the working state if the solar panel meets the charging requirement.
In some embodiments, the power supply wake-up circuit includes a fifth voltage interface, a sixth voltage interface, a third regulator tube, a sixth resistor, and an isolation unit; the fifth voltage interface is connected with the negative end of the third voltage-stabilizing tube, the positive end of the third voltage-stabilizing tube is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the input positive end of the isolation unit, the input negative end of the isolation unit is connected with the sixth voltage interface, the output positive end of the isolation unit is connected with the power supply circuit, and the output negative end of the isolation unit is connected with the power supply circuit; the fifth voltage interface is used for being connected with the voltage anode of the solar panel, and the sixth voltage interface is used for being connected with the voltage cathode of the solar panel.
In some embodiments, the isolation unit is a photovoltaic isolator.
The invention also provides a solar controller, which comprises a control circuit, a solar panel interface, an energy storage battery interface and the low-self-consumption control circuit; the solar panel interface is used for connecting a solar panel, the energy storage battery interface is used for connecting an energy storage battery, the control circuit is respectively connected with the solar panel interface and the energy storage battery interface, and the low self-consumption control circuit is respectively connected with the energy storage battery and the control circuit.
In some embodiments, the solar controller further comprises: the isolation power supply circuit is respectively connected with the solar panel interface and the energy storage battery interface; the control circuit is connected with the solar panel interface and the energy storage battery interface through the isolation power supply circuit and is used for controlling the isolation power supply circuit so that the solar panel performs constant-current charging on the energy storage battery until the voltage of the energy storage battery is greater than a preset threshold value, and then the constant-current charging is stopped.
In some embodiments, the isolated power supply circuit comprises an input terminal, a third capacitor, a field effect transistor, an isolation transformer, a second diode, a fourth capacitor, a current detection resistor, a control integrated circuit with a current detection function, and an output terminal; the input end is used for connecting the solar panel interface, the two ends of the third capacitor are connected with the two ends of the input end, one end of the input end is connected with one end of a primary coil of the isolation transformer, the other end of the primary coil of the isolation transformer is connected with the drain electrode of the field-effect tube, the source electrode of the field-effect tube is connected with the other end of the input end, the grid electrode of the field-effect tube is connected with the control integrated circuit with the current detection function, one end of the current detection resistor is connected with the control integrated circuit with the current detection function, the other end of the current detection resistor is connected with the source electrode of the field-effect tube, one end of a secondary coil of the isolation transformer is connected with the positive terminal of the second diode, and the negative terminal of the second diode is connected with one end of the output end, the other end of the secondary coil of the isolation transformer is connected with the other end of the output end, the two ends of the fourth capacitor are connected with the two ends of the output end, and the output end is used for being connected with the energy storage battery; the control integrated circuit with the current detection function is connected with the control circuit.
The invention also provides a solar power generation system which comprises the solar controller.
The embodiment of the invention has the beneficial effects that: different from the prior art, the solar controller provided by the embodiment of the invention is provided with the voltage detection circuit to detect the voltage of the energy storage battery, and the power supply circuit controls the power supply of the control circuit of the solar controller according to the detection result of the voltage detection circuit, so that the control circuit of the solar controller is in a dormant state or a working state, and the self-power consumption of the solar controller can be effectively reduced.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a low power consumption control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a low power consumption control circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the structures of the first, second and third stabilivolt tubes shown in FIG. 2;
FIG. 4 is a schematic diagram of the operational amplifier shown in FIG. 2;
FIG. 5 is a schematic diagram of the first diode shown in FIG. 2;
fig. 6 is a schematic structural diagram of the first transistor and the second transistor shown in fig. 2;
FIG. 7 is a schematic structural diagram of the isolation unit shown in FIG. 2;
fig. 8 is a schematic structural diagram of a solar controller according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of the isolated power supply circuit shown in FIG. 8;
fig. 10 is a schematic structural diagram of a solar power generation system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In order to improve the living standard of people, products which are safe, convenient, high in energy utilization rate and simple in operation and maintenance are urgently needed to solve the problem of power supply. In the prior art, a solar controller is used as a core control device of a small-sized solar power generation system, and the solar controller is respectively connected with a solar panel, an energy storage battery and a power supply load through a setting interface, so that a control circuit in the solar controller respectively controls the solar panel to supply power for the energy storage battery, the energy storage battery to supply power for the power supply load, and the energy storage battery to supply power for an internal control circuit. When running into weather not good, for example in continuous overcast and rainy day, when solar panel can't charge, even solar controller has cut off the output of power supply load, but the inside control circuit of solar controller still can continuously consume energy storage battery's electric quantity to lead to energy storage battery to cross to put easily, and then damage energy storage battery.
Based on this, the embodiment of the invention provides a low-power-consumption control circuit, a solar controller and a solar power generation system, which can cut off the power supply of the energy storage battery to the control circuit in the solar controller when the energy storage battery is in a low-voltage state, so that the power consumption of the solar controller is effectively reduced.
The low-self-consumption control circuit of the embodiment of the invention can be used as one of the functional units, independently arranged in a solar controller or a solar power generation system, and also can be used as a functional module integrated for use.
Specifically, the embodiments of the present invention will be further explained below with reference to the drawings.
Example one
Fig. 1 is a schematic structural diagram of a low power consumption control circuit according to an embodiment of the present invention. As shown in fig. 1, the low power consumption control circuit 100 of the present embodiment includes a voltage detection circuit 110 and a power supply circuit 120, and the voltage detection circuit 110 is connected to the power supply circuit 120.
Referring to fig. 1 and fig. 2, the voltage detection circuit 110 is used for connecting with the energy storage battery of the solar controller, detecting the voltage of the energy storage battery, outputting a first electrical signal when the voltage of the energy storage battery is higher than a preset threshold, and outputting a second electrical signal when the voltage of the energy storage battery is lower than or equal to the preset threshold. The preset threshold is a preset voltage threshold, and may be slightly greater than the discharge cut-off voltage of the energy storage battery, for example, 0.3 to 0.5V greater than the discharge cut-off voltage of the energy storage battery, so that damage to the energy storage battery can be avoided. The first electrical signal and the second electrical signal may be level signals, for example, when the voltage of the energy storage battery is higher than a preset threshold, a low level is output, and when the voltage of the energy storage battery is lower than or equal to the preset threshold, a high level is output. The voltage of the energy storage battery is detected, and a high level signal or a low level signal is output, so that the power supply circuit can be further controlled.
Specifically, the voltage detection circuit 110 includes a first voltage interface VD +, a second voltage interface VD-, a first resistor R1, a second resistor R2, a third resistor R3, a first voltage regulator ZD1, and an operational amplifier U1A.
The first voltage interface VD + is used for connecting a voltage anode of the energy storage battery, and the second voltage interface VD-is used for connecting a voltage cathode of the energy storage battery. The output terminal of the operational amplifier U1A is connected to the power supply circuit 120, so as to output the first electrical signal or the second electrical signal to the power supply circuit 120.
Referring to fig. 3, the first zener ZD1 is a zener diode, which is a semiconductor device having a high resistance up to a critical reverse breakdown voltage. The first voltage-stabilizing tube ZD1 is provided with a positive terminal and a negative terminal, when current flows from the positive terminal to the negative terminal of the first voltage-stabilizing tube ZD1, the first voltage-stabilizing tube ZD1 has a very high resistance, the passing current is extremely small, and when the first voltage-stabilizing tube ZD1 is reversely broken down, the current flows from the negative terminal to the positive terminal of the first voltage-stabilizing tube ZD1, and at the moment, the first voltage-stabilizing tube ZD1 has a stable voltage value.
Referring to fig. 4, the operational amplifier U1A is also called an operational amplifier, which is a circuit unit with high amplification factor, and the operational amplifier U1A may be a discrete device or a semiconductor chip. The operational amplifier U1A is powered by dual power sources and has a positive phase input terminal, a negative phase input terminal, an output terminal, a positive power supply terminal and a negative power supply terminal, so that the output voltage can change on both sides of zero voltage.
One end of a first resistor R1 is connected with a first voltage interface VD +, the other end of the first resistor R1 is connected with an inverting input end of an operational amplifier U1A, one end of a second resistor R2 is connected with an inverting input end of the operational amplifier U1A, the other end of a second resistor R2 is connected with a second voltage interface VD-, one end of a third resistor R3 is connected with the first voltage interface VD +, the other end of the third resistor R3 is connected with a non-inverting input end of the operational amplifier U1A, a negative end of a first voltage-regulator tube ZD1 is connected with a non-inverting input end of the operational amplifier U1A, a positive end of the first voltage-regulator tube ZD1 is connected with the second voltage interface VD-, a positive power end of the operational amplifier U1A is connected with the first voltage interface VD +, and a negative power end of the operational amplifier U1A is connected with the second voltage interface VD-.
In this embodiment, when the voltage of the energy storage battery is higher than the preset threshold, the input voltage is input from the inverting input terminal of the operational amplifier U1A, the output voltage is inverted with respect to the input voltage, and therefore a low level signal is output from the output terminal of the operational amplifier U1A; when the voltage of the energy storage battery is lower than or equal to the preset threshold, the input voltage is input from the non-inverting input terminal of the operational amplifier U1A, the output voltage is in phase with the input voltage, and therefore a high level signal is output at the output terminal of the operational amplifier U1A.
The power supply circuit 120 is configured to control the control circuit of the solar controller to be in a working state according to the first electrical signal, and is further configured to control the control circuit of the solar controller to be in a dormant state according to the second electrical signal.
It is worth noting that when the control circuit is in the working state, the energy storage battery supplies power to the control circuit; when the control circuit is in the dormant state, the power supply of the energy storage battery to the control circuit is cut off.
Specifically, the power supply circuit 120 includes a third voltage interface MCUV +, a fourth voltage interface MCUV-, a first diode D1, a fourth resistor R4, a fifth resistor R5, a first triode Q1, a second triode Q2, a second voltage regulator ZD2, a first capacitor C1, a second capacitor C2, and a control chip U1.
The third voltage interface MCUV + is connected with the voltage anode of the control circuit, and the fourth voltage interface MCUV-is connected with the voltage cathode of the control circuit, so that the power supply of the energy storage battery to the control circuit is controlled.
Referring to fig. 5, the first diode D1 has a positive terminal and a negative terminal, and functions to allow current to flow from the positive terminal to the negative terminal only and to block current from the negative terminal to the positive terminal.
Referring to fig. 6, the first transistor Q1 and the second transistor Q2 are transistors capable of amplifying a weak signal into an electrical signal with a large amplitude, and have a current amplification effect. In this embodiment, the first transistor Q1 and the second transistor Q2 are both NPN transistors, and the first transistor Q1 (the second transistor Q2) has a collector terminal c, a base terminal b, and an emitter terminal e, where the emitter junction is forward biased when the base terminal b is higher in potential than the emitter terminal e, and the collector junction is reverse biased when the collector terminal c is higher in potential than the base terminal b.
Referring to fig. 3, the second voltage regulator ZD2 is also provided with a positive terminal and a negative terminal, but it should be noted that the stabilized voltage value of the first voltage regulator ZD1 and the stabilized voltage value of the second voltage regulator ZD2 may be the same or different, and may be freely set according to actual conditions.
The control chip U1 may be a power management chip or a DCDC converter, the control chip U1 has an input terminal, an output terminal, and a ground terminal, and when a voltage is input to the input terminal of the control chip U1, the control chip U1 converts the input voltage to obtain a smaller voltage value and outputs the smaller voltage value from the control chip U1. In this embodiment, the output voltage of the control chip U1 is less than the voltage threshold when the low power consumption control circuit 100 operates normally, so that the operating current of the low power consumption control circuit 100 is small, for example, the operating current of the low power consumption control circuit 100 is less than 3mA, thereby prolonging the standby time of the solar controller.
Wherein, the positive terminal of the first diode D1 is used for being connected with the output terminal of the operational amplifier U1A of the voltage detection circuit 110, one terminal of the fourth resistor R4 is connected with the positive terminal of the first diode D1, the other terminal of the fourth resistor R4 is connected with the first voltage interface VD + of the voltage detection circuit 110, the negative terminal of the first diode D1 is connected with the base terminal of the first triode Q1, the emitter terminal of the first triode Q1 is connected with the second voltage interface VD-of the voltage detection circuit 110, the collector terminal of the first triode Q1 is connected with one terminal of the fifth resistor R5, the other terminal of the fifth resistor R5 is connected with the other terminal of the fourth resistor R4, the base terminal of the second triode Q2 is connected with the collector terminal of the first triode Q1, the collector terminal of the second triode Q2 is connected with the other terminal of the fourth resistor R4, the emitter terminal of the second triode Q2 is connected with the input terminal of the control chip U1, the positive end of a second voltage-regulator tube ZD2 is connected with the emitter end of a first triode Q1, the negative end of the second voltage-regulator tube ZD2 is connected with the base end of a second triode Q2, the output end of a control chip U1 is connected with a third voltage interface MCUV +, the grounding end of a control chip U1 is connected with the emitter end of a first triode Q1, a fourth voltage interface MCUV-is connected with the emitter end of a first triode Q1, one end of a first capacitor C1 is connected with the input end of a control chip U1, the other end of the first capacitor C2 is connected with the emitter end of a first triode Q1, one end of a second capacitor C2 is connected with the third voltage interface MCUV +, and the other end of the second capacitor C2 is connected with the fourth voltage interface MCUV-.
It is understood that in some other embodiments, the first capacitor C1 and/or the second capacitor C2 may be omitted.
In this embodiment, the power supply circuit 120 receives the first electrical signal or the second electrical signal of the voltage detection circuit 110, and when the first electrical signal is received, the current flows to the fourth voltage interface MCUV-after passing through the first diode D1 and the first triode Q1, the first triode Q1 is turned on, the second triode Q2 is turned off, the control chip U1 has no output, and the third voltage interface MCUV +, the fourth voltage interface MCUV-has no voltage output, so that the power supply of the control circuit is cut off; when a second electric signal is received, the current flows to the third voltage interface MCUV + after passing through the fourth resistor R4, the fifth resistor R5, the second triode Q2 and the control chip U1, the first triode Q1 is cut off, the second triode Q2 is turned on, the control chip U1 has output, and the third voltage interface MCUV + and the fourth voltage interface MCUV-have voltage output, so that the control circuit is powered.
In some other embodiments, referring back to fig. 1 and 2, the low power consumption control circuit 100 further comprises a power supply wake-up circuit 130. The power supply wake-up circuit 130 is connected with the power supply circuit 120, and the power supply wake-up circuit 130 is used for detecting whether the solar panel of the solar controller meets the charging requirement when the control circuit is in a dormant state, and controlling the control circuit to enter a working state if the solar panel meets the charging requirement.
Specifically, the power supply wake-up circuit 130 includes a fifth voltage interface VP +, a sixth voltage interface VP-, a third voltage regulator ZD3, a sixth resistor R6, and an isolation unit U2.
The fifth voltage interface VP + is used for connecting the voltage anode of the solar panel, and the sixth voltage interface VP-is used for connecting the voltage cathode of the solar panel.
Referring to fig. 3, the third voltage regulator ZD3 is also provided with a positive terminal and a negative terminal, but it should be noted that the stabilized voltage value of the first voltage regulator ZD1, the stabilized voltage value of the second voltage regulator ZD2, and the stabilized voltage value of the third voltage regulator ZD3 may be the same or different, and may be freely set according to actual conditions.
Referring to fig. 7, the isolation unit U2 is an optoelectronic isolator generally composed of three parts, i.e., transmitting, receiving and signal amplifying, and the input electrical signal drives a Light Emitting Diode (LED) to emit light with a certain wavelength, which is received by a photodetector to generate a photocurrent, which is further amplified and then output, thereby performing input, output and isolation functions. In this embodiment, the isolation unit U2 has an input positive terminal ei +, an input negative terminal ei +, an output positive terminal eo +, and an output negative terminal eo-, and electrical signals are input from the input positive terminal ei + and the input negative terminal ei-, and are output from the output positive terminal eo + and the output negative terminal eo-after electrical-optical-electrical conversion.
The fifth voltage interface VP + is connected with the negative end of the third voltage-regulator tube ZD3, the positive end of the third voltage-regulator tube ZD3 is connected with one end of a sixth resistor R6, the other end of the sixth resistor R6 is connected with the input positive end ei + of the isolation unit U2, the input negative end ei-of the isolation unit U2 is connected with the sixth voltage interface VP-, the output positive end eo + of the isolation unit U2 is connected with the power supply circuit 120, and the output negative end eo-of the isolation unit U2 is connected with the power supply circuit 120. Specifically, the output positive terminal eo + of the isolation unit U2 is connected to the other end of the fourth resistor R4, and the output negative terminal eo-of the isolation unit U2 is connected to the emitter e of the first transistor Q1.
In this embodiment, when the control circuit is in the sleep state, when the solar panel of the solar controller meets the charging requirement, the fifth voltage interface VP + and the sixth voltage interface VP-have voltage input, and after passing through the isolation unit U2, the voltage input is input to the power supply circuit 120, so that the first triode Q1 is turned from on to off, and the second triode Q2 is turned from off to on, so that the control circuit recovers power supply, and the solar controller can enter a normal working state.
In the embodiment, the low power consumption control circuit 100 detects the voltage of the energy storage battery by setting the voltage detection circuit 110, and the power supply circuit 120 controls the power supply of the control circuit of the solar controller according to the detection result of the voltage detection circuit 110, so that the control circuit of the solar controller is in a sleep state or a working state, and the power consumption of the solar controller can be effectively reduced.
Example two
Fig. 8 is a schematic structural diagram of a solar controller according to an embodiment of the present invention. As shown in fig. 8, the solar controller 200 includes a control circuit 210, a solar panel interface 220, an energy storage battery interface 230, and the low power consumption control circuit 100 according to the first embodiment.
The solar panel interface 220 is used for connecting a solar panel, the energy storage battery interface 230 is used for connecting an energy storage battery, the control circuit 210 is respectively connected with the solar panel interface 220 and the energy storage battery interface 230, and the low self-consumption control circuit 100 is respectively connected with the energy storage battery and the control circuit 210.
Specifically, the solar panel interface 220 is connected to the power supply wake-up circuit 130, the energy storage battery interface 230 is connected to the voltage detection circuit 110, and the power supply circuit 120 is connected to the control circuit 210. The voltage detection circuit 110 detects the voltage of the energy storage battery through the energy storage battery interface 230, the power supply circuit 120 controls the power supply to the control circuit 210 according to the voltage of the energy storage battery, and the power supply wake-up circuit 130 is connected with the solar panel through the solar panel interface 220, so as to wake up the power supply circuit 130.
In some other embodiments, the solar controller 200 further includes a power supply load interface 240, the power supply load interface 240 is connected to the control circuit 210, and the control circuit 210 is further configured to control the energy storage battery to supply power to the load through the power supply load interface 240 in the operating state.
In some other embodiments, the solar controller 200 further includes an isolated power supply circuit 250. The isolated power circuit 250 is connected to the solar panel interface 220 and the energy storage battery interface 230, respectively. The control circuit 210 is connected to the solar panel interface 220 and the energy storage battery interface 230 through the isolation power circuit 250, and the control circuit 210 is configured to control the isolation power circuit 250, so that the solar panel performs constant current charging on the energy storage battery, and the constant current charging is stopped until the voltage of the energy storage battery is greater than a preset threshold value.
Specifically, referring to fig. 9, the isolation power circuit 250 includes an input terminal Vi, a third capacitor C3, a field effect transistor MOS1, an isolation transformer Lm, a second diode D2, a fourth capacitor C4, a current detection resistor R7, a control integrated circuit IC having a current detection function, and an output terminal Vo. The input end Vi is used for connecting the solar panel interface 220, two ends of a third capacitor C3 are connected with two ends of the input end Vi, one end of the input end Vi is connected with one end of a primary coil of an isolation transformer Lm, the other end of the primary coil of the isolation transformer Lm is connected with a drain electrode of a field effect transistor MOS1, a source electrode of the field effect transistor MOS1 is connected with the other end of the input end Vi, a grid electrode of the field effect transistor MOS1 is connected with a control integrated circuit IC with a current detection function, one end of a current detection resistor R7 is connected with the control integrated circuit IC with the current detection function, the other end of a current detection resistor R7 is connected with a source electrode of a field effect transistor MOS1, one end of a secondary coil of the isolation transformer Lm is connected with a positive electrode end of a second diode D2, a negative electrode of the second diode D2 is connected with one end of the output end Vo, both ends of the fourth capacitor C4 are connected to both ends of the output Vo, the output Vo is used for connecting the energy storage battery, and the control integrated circuit IC having a current detection function is connected to the control circuit 210. In this embodiment, the control circuit 210 controls the turn-off of the field effect transistor MOS1 by controlling the control integrated circuit IC having the current detection function, so as to control the solar panel to charge the energy storage battery until the voltage of the energy storage battery is greater than the preset threshold.
The solar controller 200 in this embodiment is connected to the control circuit 210 and the energy storage battery interface 230 through the low power consumption control circuit 100, so that the control circuit 210 is in a sleep state or a working state, and the power consumption of the solar controller 100 can be effectively reduced.
EXAMPLE III
Fig. 10 is a schematic structural diagram of a solar power generation system according to an embodiment of the present invention. As shown in fig. 10, the solar power generation system 300 includes the solar controller 200 of the second embodiment, and further includes a solar panel 310, an energy storage cell 320, and a load 330. The solar panel 310 is connected to the solar panel interface 220 of the solar controller 200, the energy storage battery 320 is connected to the energy storage battery interface 230 of the solar controller 200, and the load 330 is connected to the power supply load interface 240 of the solar controller 200.
The solar panel 310 is a solar panel assembly and can convert solar energy into electric energy; the energy storage battery 320 is an energy storage battery assembly and can be used for storing electric energy; the load 330 is a power supply carrier of the solar power generation system.
The solar power generation system 300 in this embodiment can make the control circuit 210 in a sleep state or an operating state, and further can effectively reduce the self-power consumption of the solar controller 100.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A low-self-consumption control circuit is characterized by comprising a voltage detection circuit, a power supply circuit and a power supply wake-up circuit;
the voltage detection circuit comprises a first voltage interface, a second voltage interface, a first resistor, a second resistor, a third resistor, a first voltage-regulator tube and an operational amplifier;
the power supply circuit comprises a third voltage interface, a fourth voltage interface, a first diode, a fourth resistor, a fifth resistor, a first triode, a second voltage-regulator tube, a first capacitor, a second capacitor and a control chip;
the power supply wake-up circuit comprises a fifth voltage interface, a sixth voltage interface, a third voltage regulator tube, a sixth resistor and an isolation unit;
the first voltage interface is used for connecting a voltage anode of an energy storage battery, the second voltage interface is used for connecting a voltage cathode of the energy storage battery and the fourth voltage interface, the third voltage interface is used for connecting a voltage anode of a control circuit, the fourth voltage interface is used for connecting a voltage cathode of the control circuit, the fifth voltage interface is used for connecting a voltage anode of a solar panel, the sixth voltage interface is used for connecting a voltage cathode of the solar panel, one end of the first resistor, one end of the third resistor, a positive power source end of the operational amplifier, one end of the fourth resistor, one end of the fifth resistor and a collector end of the second triode are all connected with the first voltage interface, and the other end of the first resistor, one end of the second resistor and an inverted input end of the operational amplifier are connected together, the other end of the third resistor, the negative end of the first voltage-stabilizing tube and the non-inverting input end of the operational amplifier are connected together, the other end of the second resistor, the positive end of the first voltage-stabilizing tube and the negative power end of the operational amplifier are connected with the second voltage interface, the output end of the operational amplifier, the other end of the fourth resistor, the positive end of the first diode and the output positive end of the isolation unit are connected together, the negative end of the first diode is connected with the base end of the first triode, the collector end of the first triode, the other end of the fifth resistor, the base end of the second triode and the negative end of the second voltage-stabilizing tube are connected together, the emitter end of the second triode, one end of the first capacitor and the input end of the control chip are connected together, the output end of the control chip and one end of the second capacitor are connected with the third voltage interface, the grounding end of the control chip, the emitter end of the first triode, the positive end of the second voltage-stabilizing tube, the other end of the first capacitor and the other end of the second capacitor are all connected with the fourth voltage interface, the negative end of the third voltage-stabilizing tube is connected with the fifth voltage interface, the positive end of the third voltage-stabilizing tube is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the input positive end of the isolation unit, the input negative end of the isolation unit is connected with the sixth voltage interface, and the output negative end of the isolation unit is connected with the second voltage interface.
2. The low self-consumption control circuit according to claim 1, wherein the isolation unit is a photo-isolator.
3. A solar controller comprising control circuitry, a solar panel interface, an energy storage cell interface, and the low power consumption control circuitry of claim 1 or 2;
the solar panel interface is used for connecting a solar panel, the energy storage battery interface is used for connecting an energy storage battery, the control circuit is respectively connected with the solar panel interface and the energy storage battery interface, and the low self-consumption control circuit is respectively connected with the energy storage battery and the control circuit.
4. The solar controller of claim 3, further comprising:
the isolation power supply circuit is respectively connected with the solar panel interface and the energy storage battery interface;
the control circuit is connected with the solar panel interface and the energy storage battery interface through the isolation power supply circuit and is used for controlling the isolation power supply circuit so that the solar panel performs constant-current charging on the energy storage battery until the voltage of the energy storage battery is greater than a preset threshold value, and then the constant-current charging is stopped.
5. The solar controller according to claim 4, wherein the isolated power supply circuit comprises an input terminal, a third capacitor, a field effect transistor, an isolation transformer, a second diode, a fourth capacitor, a current detection resistor, a control integrated circuit with a current detection function, and an output terminal;
the input end is used for connecting the solar panel interface, the two ends of the third capacitor are connected with the two ends of the input end, one end of the input end is connected with one end of a primary coil of the isolation transformer, the other end of the primary coil of the isolation transformer is connected with the drain electrode of the field-effect tube, the source electrode of the field-effect tube is connected with the other end of the input end, the grid electrode of the field-effect tube is connected with the control integrated circuit with the current detection function, one end of the current detection resistor is connected with the control integrated circuit with the current detection function, the other end of the current detection resistor is connected with the source electrode of the field-effect tube, one end of a secondary coil of the isolation transformer is connected with the positive terminal of the second diode, and the negative terminal of the second diode is connected with one end of the output end, the other end of the secondary coil of the isolation transformer is connected with the other end of the output end, the two ends of the fourth capacitor are connected with the two ends of the output end, and the output end is used for being connected with the energy storage battery;
the control integrated circuit with the current detection function is connected with the control circuit.
6. A solar power generation system comprising a solar controller according to any one of claims 3 to 5.
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| CN201811011344.7A CN109066952B (en) | 2018-08-31 | 2018-08-31 | Low-self-consumption control circuit, solar controller and solar power generation system |
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| CN201811011344.7A CN109066952B (en) | 2018-08-31 | 2018-08-31 | Low-self-consumption control circuit, solar controller and solar power generation system |
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| CN109768592B (en) * | 2019-01-02 | 2021-07-20 | 中国船舶重工集团公司第七0七研究所 | Integrated power supply unit of top sensitive part |
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| CN205249553U (en) * | 2015-11-27 | 2016-05-18 | 肖志军 | A power saving power module circuit and LED lamp driving circuit for integrated circuit |
| CN206686099U (en) * | 2016-11-11 | 2017-11-28 | 苏州欧姆尼克新能源科技有限公司 | Photovoltaic DC-to-AC converter control module wake-up circuit |
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| CN102761361A (en) * | 2012-07-25 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Low-consumption optical module, and realization method and realization circuit thereof |
| CN104869003A (en) * | 2014-02-25 | 2015-08-26 | 华为技术有限公司 | Power supply device and method |
| CN105517236A (en) * | 2015-12-24 | 2016-04-20 | 赵晓玲 | Solar energy-based LED street lamp lighting control system |
| CN106301199A (en) * | 2016-08-18 | 2017-01-04 | 许昌学院 | A kind of photovoltaic power generation apparatus |
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| CN205249553U (en) * | 2015-11-27 | 2016-05-18 | 肖志军 | A power saving power module circuit and LED lamp driving circuit for integrated circuit |
| CN206686099U (en) * | 2016-11-11 | 2017-11-28 | 苏州欧姆尼克新能源科技有限公司 | Photovoltaic DC-to-AC converter control module wake-up circuit |
| CN207490079U (en) * | 2017-11-14 | 2018-06-12 | 河南金源环宇储能技术有限公司 | Solar street light lithium ion battery intelligently stores up the low-temperature heat circuit of control system |
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