Solar power supply voltage stabilizing circuit

Abstract

The utility model discloses a solar power supply voltage stabilizing circuit, which relates to the technical field of solar energy, and comprises a photovoltaic adjusting module used for photoelectric conversion, voltage stabilizing adjustment and multi-path output; the voltage detection module is used for voltage sampling and low-voltage detection; the time-delay control module is used for controlling the discharging work of the discharging control module in a time-delay manner and controlling the power-off work of the electric energy control module in a time-delay manner in a low-voltage time; the electric energy control module is used for rectifying, transmitting and voltage-stabilizing electric energy and supplying power to the output module; the energy storage module is used for rectification filtering, voltage stabilization processing and storage of the electric energy and is used for discharging; and the discharge control module is used for transmitting the electric energy released by the energy storage module. The solar power supply voltage stabilizing circuit can supply power to the output module and the energy storage module separately at the same time, reduces the frequency of charging and discharging of the energy storage module at the same time, improves the cruising ability and the service life of the energy storage module, and is supplied with power by the energy storage module when the voltage is low so as to ensure the power supply demand of the output module.

Description

Technical Field

[0001] The utility model relates to the technical field of solar energy, in particular to a solar energy power supply voltage stabilizing circuit. Background Art

[0002] Solar power supply, also known as solar charger or solar mobile power supply, is a portable power supply device that converts solar energy into electrical energy. It is usually composed of photovoltaic panels, batteries, charge and discharge converters and controllers. The battery stores the electrical energy output by the photovoltaic panels. When power is needed, the battery cooperates with the charge and discharge converter to supply power. Due to the inability to reasonably control the power supply state, the power provided by the photovoltaic panels is sufficient to meet the power supply needs and when power is needed to the load, the battery will be in the state of charging and discharging at the same time, which will easily reduce the service life of the battery for a long time and reduce the battery's endurance, so it needs to be improved. Utility Model Content

[0003] The embodiment of the utility model provides a solar power supply voltage stabilizing circuit to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A solar power supply voltage stabilizing circuit, comprising: a photovoltaic regulation module, a voltage detection module, a delay control module, an electric energy control module, an output module, an energy storage module and a discharge control module;

[0006] Photovoltaic regulation module, used for photoelectric conversion and voltage regulation and multi-channel output of the converted electric energy;

[0007] A voltage detection module, connected to the photovoltaic regulation module, for sampling the voltage of the converted electric energy, for setting a low voltage threshold and outputting a first control signal when the sampled signal is less than the low voltage threshold;

[0008] A delay control module, connected to the voltage detection module, for delaying the first control signal and outputting a second control signal;

[0009] an electric energy control module, connected to the photovoltaic regulation module, the delay control module and the discharge control module, for rectifying the electric energy output by the photovoltaic regulation module, for transmitting the rectified electric energy and stopping the transmission of the electric energy when receiving a second control signal, for stabilizing the transmitted electric energy and the electric energy output by the discharge control module and outputting the first electric energy;

[0010] An output module, connected to the power control module, configured to receive the first power and connect to a load;

[0011] An energy storage module, connected to the photovoltaic regulation module and the discharge control module, for rectifying, filtering and stabilizing the electric energy output by the photovoltaic regulation module and storing the processed electric energy for powering the discharge control module;

[0012] The discharge control module is connected to the delay control module and is used to receive the second control signal and transmit the electric energy provided by the energy storage module to the electric energy control module.

[0013] As a further solution of the utility model: the photovoltaic regulation module includes a photovoltaic panel, a first capacitor, a switching power supply device, and a first transformer; the power control module includes a first diode, a second diode, a first resistor, a first power tube, and a first switch tube;

[0014] Preferably, the first end of the photovoltaic panel is connected to one end of the first capacitor and the first input end of the switching power supply device, the second end of the photovoltaic panel is connected to the other end of the first capacitor and the second input end of the switching power supply device, the first output end and the second output end of the switching power supply device are respectively connected to the first end and the second end of the primary side of the first transformer, the first end of the first secondary side of the first transformer is connected to the anode of the first diode, the cathode of the first diode is connected to the cathode of the second diode and the drain of the first power tube and the gate of the first power tube and the collector of the first switching tube are connected through the first resistor, the emitter of the first switching tube, the anode of the second diode and the second end of the first secondary side of the first transformer are all grounded, the base of the first switching tube is connected to the delay control module, the source of the first power tube is connected to the discharge control module, and the second secondary side of the first transformer is connected to the energy storage module.

[0015] As a further solution of the utility model: the power control module further includes a second capacitor, a first voltage stabilizer and a third capacitor; the output module includes an output port;

[0016] Preferably, one end of the second capacitor is connected to the first end of the first regulator and the source of the first power tube, the second end of the first regulator is connected to one end of the third capacitor and the first end of the output port, and the other end of the second capacitor is connected to the third end of the first regulator, the other end of the third capacitor and the second end of the output port.

[0017] As a further solution of the utility model: the energy storage module includes a third diode, a fourth diode, a fifth capacitor, a second voltage stabilizer, a sixth capacitor and an energy storage device;

[0018] Preferably, the anode of the third diode is connected to the first end of the second secondary side of the first transformer, the cathode of the third diode is connected to the cathode of the fourth diode, one end of the fifth capacitor and the first end of the second regulator, the second end of the second regulator is connected to one end of the sixth capacitor and the first end of the energy storage device, and the anode of the fourth diode is connected to the other end of the fifth capacitor, the third end of the second regulator, the other end of the sixth capacitor, the second end of the energy storage device and the second end of the second secondary side of the first transformer.

[0019] As a further solution of the utility model: the discharge control module includes a second power tube;

[0020] Preferably, the drain of the second power tube is connected to the first end of the energy storage device, the source of the second power tube is connected to the source of the first power tube, and the gate of the second power tube is connected to the delay control module.

[0021] As a further solution of the utility model: the voltage detection module includes a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first power supply and a first comparator;

[0022] Preferably, the first power supply is connected to the in-phase end of the first comparator and one end of the seventh resistor through the sixth resistor, the inverting end of the first comparator is connected to one end of the fifth resistor and connected to the first end of the photovoltaic panel through the fourth resistor, the other end of the seventh resistor is connected to the other end of the fifth resistor, the second end of the photovoltaic panel and the ground, and the output end of the first comparator is connected to the delay control module.

[0023] As a further solution of the utility model: the delay control module includes a third resistor, a fourth capacitor and a second resistor;

[0024] Preferably, one end of the third resistor is connected to the output end of the first comparator, the other end of the third resistor is connected to the gate of the second power tube and one end of the second resistor is grounded through a fourth capacitor, and the other end of the second capacitor is connected to the base of the first switch tube.

[0025] Compared with the prior art, the beneficial effects of the utility model are as follows: the solar power supply voltage stabilizing circuit of the utility model performs photoelectric conversion and multi-channel power supply by the photovoltaic regulation module. When the electric energy output by the photovoltaic regulation module meets the power supply demand, the electric energy control module can perform rectification and voltage stabilization processing to power the output module. At the same time, the energy storage module can perform electric energy processing and energy storage work, reducing the frequency of simultaneous charging and discharging of the energy storage module, and improving the endurance and service life of the energy storage module. The voltage detection module performs low voltage detection on the photovoltaic regulation module, and when the voltage is low, cooperates with the delay control module to control the delayed discharge work of the discharge control module, and transmits the electric energy released by the energy storage module to the electric energy control module through the discharge control module to ensure the power supply demand for the output module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 The present invention provides a schematic block diagram of a solar power supply voltage stabilizing circuit.

[0028] Figure 2 A circuit diagram of a solar power supply voltage stabilizing circuit provided in an example of the utility model.

[0029] Figure 3 This is a connection circuit diagram of a voltage detection module provided in an example of the utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In one embodiment, see Figure 1 , a solar power supply voltage stabilizing circuit, comprising: a photovoltaic regulation module 1, a voltage detection module 2, a delay control module 3, an electric energy control module 4, an output module 5, an energy storage module 6 and a discharge control module 7;

[0032] Specifically, the photovoltaic regulation module 1 is used to perform photoelectric conversion and perform voltage regulation and multi-channel output on the converted electric energy;

[0033] A voltage detection module 2, connected to the photovoltaic regulation module 1, for sampling the voltage of the converted electric energy, for setting a low voltage threshold and outputting a first control signal when the sampled signal is less than the low voltage threshold;

[0034] A delay control module 3, connected to the voltage detection module 2, for delaying the first control signal and outputting a second control signal;

[0035] The electric energy control module 4 is connected to the photovoltaic regulation module 1, the delay control module 3 and the discharge control module 7, and is used to rectify the electric energy output by the photovoltaic regulation module 1, to transmit the rectified electric energy and to stop the transmission of the electric energy when receiving the second control signal, and to stabilize the transmitted electric energy and the electric energy output by the discharge control module 7 and output the first electric energy;

[0036] An output module 5, connected to the power control module 4, for receiving the first power and connecting to a load;

[0037] The energy storage module 6 is connected to the photovoltaic regulation module 1 and the discharge control module 7, and is used to rectify, filter and stabilize the electric energy output by the photovoltaic regulation module 1 and store the processed electric energy, so as to supply power to the discharge control module 7;

[0038] The discharge control module 7 is connected to the delay control module 3 and is used to receive the second control signal and transmit the electric energy provided by the energy storage module 6 to the electric energy control module 4 .

[0039] In a specific embodiment, the photovoltaic regulation module 1 may adopt a photovoltaic regulation circuit composed of a photovoltaic panel, a switching power supply device, a transformer, etc., and may perform photoelectric conversion, voltage regulation and multi-channel output; the voltage detection module 2 may adopt a voltage detection circuit composed of a resistor, a comparator, etc., to perform voltage sampling on the electric energy converted by the photovoltaic regulation module 1, and determine whether the photovoltaic regulation module 1 has a low voltage by setting a low voltage threshold; the delay control module 3 may adopt a delay control circuit composed of a capacitor and a resistor, and may delay the output of a high-level state signal; the power control module 4 may adopt a power control circuit composed of a voltage stabilizer, a diode, a power tube, a triode, etc., to rectify the input electric energy, and perform power transmission processing and voltage stabilization filtering processing; the output module 5 may adopt an output circuit composed of an output port, and be connected to a load; the energy storage module 6 may adopt an energy storage circuit composed of an energy storage device, a voltage stabilizer, a diode, etc., to rectify and filter, regulate and store the input electric energy, and release the stored electric energy; the discharge control module 7 may adopt a discharge control circuit composed of a power tube to perform discharge control on the energy storage module 6.

[0040] In another embodiment, see Figure 1 , Figure 2 and Figure 3 The photovoltaic regulation module 1 includes a photovoltaic panel, a first capacitor C1, a switching power supply device, and a first transformer B1; the power control module 4 includes a first diode D1, a second diode D2, a first resistor R1, a first power tube Q1, and a first switch tube VT1;

[0041] Specifically, a first end of the photovoltaic panel is connected to one end of the first capacitor C1 and a first input end of the switching power supply device, a second end of the photovoltaic panel is connected to the other end of the first capacitor C1 and a second input end of the switching power supply device, a first output end and a second output end of the switching power supply device are respectively connected to the first end and the second end of the primary side of the first transformer B1, a first end of the first secondary side of the first transformer B1 is connected to the anode of the first diode D1, a cathode of the first diode D1 is connected to the cathode of the second diode D2 and the drain of the first power tube Q1 and is connected to the gate of the first power tube Q1 and the collector of the first switch tube VT1 through the first resistor R1, an emitter of the first switch tube VT1, an anode of the second diode D2 and a second end of the first secondary side of the first transformer B1 are all grounded, a base of the first switch tube VT1 is connected to the delay control module 3, a source of the first power tube Q1 is connected to the discharge control module 7, and a second secondary side of the first transformer B1 is connected to the energy storage module 6.

[0042] In a specific embodiment, the switching power supply device can be a switching power supply circuit composed of a power management chip TOP223Y; the first transformer B1 can be a multi-winding transformer; the first diode D1 and the second diode D2 perform rectification processing; the first power tube Q1 can be an N-channel field effect tube, which is triggered to turn on by the first resistor R1 and triggered to turn off by the first switch tube VT1, wherein the first switch tube VT1 can be an NPN transistor.

[0043] Furthermore, the power control module 4 further includes a second capacitor C2, a first voltage regulator IC1 and a third capacitor C3; the output module 5 includes an output port;

[0044] Specifically, one end of the second capacitor C2 is connected to the first end of the first regulator IC1 and the source of the first power tube Q1, the second end of the first regulator IC1 is connected to one end of the third capacitor C3 and the first end of the output port, and the other end of the second capacitor is connected to the third end of the first regulator IC1, the other end of the third capacitor C3 and the second end of the output port.

[0045] In a specific embodiment, the first voltage regulator IC1 may be a LM317 adjustable voltage regulator.

[0046] Further, the energy storage module 6 includes a third diode D3, a fourth diode D4, a fifth capacitor C5, a second voltage regulator IC2, a sixth capacitor C6 and an energy storage device;

[0047] Specifically, the anode of the third diode D3 is connected to the first end of the second secondary side of the first transformer B1, the cathode of the third diode D3 is connected to the cathode of the fourth diode D4, one end of the fifth capacitor C5 and the first end of the second voltage regulator IC2, the second end of the second voltage regulator IC2 is connected to one end of the sixth capacitor C6 and the first end of the energy storage device, and the anode of the fourth diode D4 is connected to the other end of the fifth capacitor C5, the third end of the second voltage regulator IC2, the other end of the sixth capacitor C6, the second end of the energy storage device and the second end of the second secondary side of the first transformer B1.

[0048] In a specific embodiment, the second voltage regulator IC2 may be a LM317 adjustable voltage regulator; the energy storage device may be a battery pack.

[0049] Further, the discharge control module 7 includes a second power tube Q2;

[0050] Specifically, the drain of the second power tube Q2 is connected to the first end of the energy storage device, the source of the second power tube Q2 is connected to the source of the first power tube Q1 , and the gate of the second power tube Q2 is connected to the delay control module 3 .

[0051] In a specific embodiment, the second power tube Q2 can be an N-channel field effect tube.

[0052] Further, the voltage detection module 2 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first power source VCC1 and a first comparator A1;

[0053] Specifically, the first power supply VCC1 is connected to the in-phase end of the first comparator A1 and one end of the seventh resistor R7 through the sixth resistor R6, the inverting end of the first comparator A1 is connected to one end of the fifth resistor R5 and connected to the first end of the photovoltaic panel through the fourth resistor R4, the other end of the seventh resistor R7 is connected to the other end of the fifth resistor R5, the second end of the photovoltaic panel and the ground, and the output end of the first comparator A1 is connected to the delay control module 3.

[0054] In a specific embodiment, the fourth resistor R4 and the fifth resistor R5 perform voltage sampling; the first power supply VCC1, the sixth resistor R6 and the seventh resistor R7 provide a low voltage threshold; and the first comparator A1 can be a LM358 comparator.

[0055] Further, the delay control module 3 includes a third resistor R3, a fourth capacitor C4 and a second resistor R2;

[0056] Specifically, one end of the third resistor R3 is connected to the output end of the first comparator A1, the other end of the third resistor R3 is connected to the gate of the second power tube Q2 and one end of the second resistor R2 is grounded through the fourth capacitor C4, and the other end of the second capacitor C2 is connected to the base of the first switch tube VT1.

[0057] In a specific embodiment, the third resistor R3 and the fourth capacitor C4 form an RC delay circuit.

[0058] In a solar power supply voltage stabilization circuit of the present embodiment, the photovoltaic panel performs photoelectric conversion, the switching power supply device performs voltage stabilization and regulation, and then the first transformer B1 performs multi-channel output. The electric energy after rectification by the first diode D1 and the second diode D2 is transmitted to the first voltage regulator IC1 through the first power tube Q1, and is transmitted to the output port after voltage stabilization by the first voltage regulator IC1. At the same time, the electric energy after voltage stabilization by the third diode D3 and the fourth diode D4 is stabilized by the second voltage regulator IC2 to provide charging electric energy for the energy storage device. The fourth resistor R4 and the fifth resistor R5 perform voltage sampling on the electric energy output by the photovoltaic panel. When the sampled signal is less than the low voltage threshold set by the first power supply VCC1, the sixth resistor R6 and the seventh resistor R7, the first comparator A1 outputs a high level and controls the first switch tube VT1 and the second power tube Q2 to be turned on. At the same time, the fourth capacitor C 4 for energy storage, the first switch tube VT1 controls the first power tube Q1 to be turned off, the second power tube Q2 transmits the electric energy released by the energy storage device to the first voltage regulator IC1, the voltage is stabilized by the first voltage regulator IC1 and the stabilized electric energy is transmitted to the output port, if during this period the signal sampled by the fourth resistor R4 and the fifth resistor R5 is greater than the low voltage threshold, the first comparator A1 outputs a low level, the fourth capacitor C4 delays the control of the second power tube Q2 and the first switch tube VT1 to be turned on, and at the same time the electric energy output by the photovoltaic panel after being processed by the switching power supply device can be processed by the third diode D3, the fourth diode D4, the fifth capacitor C5 and the second voltage regulator IC2, and then transmitted to the energy storage device, until the fourth capacitor C4 is discharged, the second power tube Q2 and the first switch tube VT1 are both turned off, and the photovoltaic panel cooperates with the switching power supply device and the first transformer B1 to supply power to the power control module 4 and the energy storage module 6 again.

[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A solar power supply voltage stabilizing circuit, characterized in that: The solar power supply voltage stabilizing circuit includes: a photovoltaic regulation module, a voltage detection module, a delay control module, an electric energy control module, an output module, an energy storage module and a discharge control module; The photovoltaic regulation module is used to perform photoelectric conversion and to perform voltage regulation and multi-channel output on the converted electric energy; The voltage detection module is connected to the photovoltaic regulation module and is used to perform voltage sampling on the converted electric energy, to set a low voltage threshold and to output a first control signal when the sampled signal is less than the low voltage threshold; The delay control module is connected to the voltage detection module and is used to delay the first control signal and output a second control signal; The electric energy control module is connected to the photovoltaic regulation module, the delay control module and the discharge control module, and is used to rectify the electric energy output by the photovoltaic regulation module, to transmit the rectified electric energy and to stop the transmission of the electric energy when receiving the second control signal, and to stabilize the transmitted electric energy and the electric energy output by the discharge control module and output the first electric energy; The output module is connected to the power control module and is used to receive the first power and connect to the load; The energy storage module is connected to the photovoltaic regulation module and the discharge control module, and is used to rectify, filter and stabilize the electric energy output by the photovoltaic regulation module and store the processed electric energy for powering the discharge control module; The discharge control module is connected to the delay control module, and is used to receive the second control signal and transmit the electric energy provided by the energy storage module to the electric energy control module.

2. A solar power supply voltage stabilizing circuit according to claim 1, characterized in that: The photovoltaic regulation module includes a photovoltaic panel, a first capacitor, a switching power supply device, and a first transformer; the power control module includes a first diode, a second diode, a first resistor, a first power tube, and a first switch tube; The first end of the photovoltaic panel is connected to one end of the first capacitor and the first input end of the switching power supply device, the second end of the photovoltaic panel is connected to the other end of the first capacitor and the second input end of the switching power supply device, the first output end and the second output end of the switching power supply device are respectively connected to the first end and the second end of the primary side of the first transformer, the first end of the first secondary side of the first transformer is connected to the anode of the first diode, the cathode of the first diode is connected to the cathode of the second diode and the drain of the first power tube and is connected to the gate of the first power tube and the collector of the first switch tube through the first resistor, the emitter of the first switch tube, the anode of the second diode and the second end of the first secondary side of the first transformer are all grounded, the base of the first switch tube is connected to the delay control module, the source of the first power tube is connected to the discharge control module, and the second secondary side of the first transformer is connected to the energy storage module.

3. A solar power supply voltage stabilizing circuit according to claim 2, characterized in that: The power control module further includes a second capacitor, a first voltage stabilizer and a third capacitor; the output module includes an output port; One end of the second capacitor is connected to the first end of the first regulator and the source of the first power tube, the second end of the first regulator is connected to one end of the third capacitor and the first end of the output port, and the other end of the second capacitor is connected to the third end of the first regulator, the other end of the third capacitor and the second end of the output port.

4. A solar power supply voltage stabilizing circuit according to claim 3, characterized in that: The energy storage module includes a third diode, a fourth diode, a fifth capacitor, a second voltage stabilizer, a sixth capacitor and an energy storage device; The anode of the third diode is connected to the first end of the second secondary side of the first transformer, the cathode of the third diode is connected to the cathode of the fourth diode, one end of the fifth capacitor and the first end of the second regulator, the second end of the second regulator is connected to one end of the sixth capacitor and the first end of the energy storage device, and the anode of the fourth diode is connected to the other end of the fifth capacitor, the third end of the second regulator, the other end of the sixth capacitor, the second end of the energy storage device and the second end of the second secondary side of the first transformer.

5. A solar power supply voltage stabilizing circuit according to claim 4, characterized in that: The discharge control module includes a second power tube; The drain of the second power tube is connected to the first end of the energy storage device, the source of the second power tube is connected to the source of the first power tube, and the gate of the second power tube is connected to the delay control module.

6. A solar power supply voltage stabilizing circuit according to claim 5, characterized in that: The voltage detection module includes a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first power supply and a first comparator; The first power supply is connected to the in-phase end of the first comparator and one end of the seventh resistor through the sixth resistor, the inverting end of the first comparator is connected to one end of the fifth resistor and connected to the first end of the photovoltaic panel through the fourth resistor, the other end of the seventh resistor is connected to the other end of the fifth resistor, the second end of the photovoltaic panel and the ground, and the output end of the first comparator is connected to the delay control module.

7. A solar power supply voltage stabilizing circuit according to claim 6, characterized in that: The delay control module includes a third resistor, a fourth capacitor and a second resistor; One end of the third resistor is connected to the output end of the first comparator, the other end of the third resistor is connected to the gate of the second power tube and one end of the second resistor is grounded through the fourth capacitor, and the other end of the second capacitor is connected to the base of the first switch tube.

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