CN109066955B - Solar power supply unit capable of being combined in multiple stages - Google Patents
Solar power supply unit capable of being combined in multiple stages Download PDFInfo
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- CN109066955B CN109066955B CN201811058863.9A CN201811058863A CN109066955B CN 109066955 B CN109066955 B CN 109066955B CN 201811058863 A CN201811058863 A CN 201811058863A CN 109066955 B CN109066955 B CN 109066955B
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- 239000003990 capacitor Substances 0.000 claims description 44
- 238000004891 communication Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000010248 power generation Methods 0.000 description 6
- 238000005286 illumination Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- -1 graphite alkene Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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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- H02J3/385—
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/42—Synchronising a generator for connection to a network or to another generator with automatic parallel connection when synchronisation is achieved
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention discloses a solar power supply unit capable of being combined in multiple stages, which integrates components such as a rechargeable battery, an MPPT (maximum power point tracking) controller, an inverter, a charge-discharge controller and the like with a solar panel to form unit type solar power supply equipment, and is convenient to install, use and carry. Meanwhile, a synchronization module is arranged in each solar power supply unit, when a plurality of solar power supply units are connected together through the synchronization module, each solar power supply unit can generate consistent PWM driving signals based on the same sine wave signal through the synchronization module of each solar power supply unit, so that the phases of alternating current voltages output by inverters of each solar power supply unit are consistent, a complex phase detection and tracking grid-connected circuit is not needed, and the condition of fault expansion caused by faults of the synchronization circuit is avoided.
Description
Technical Field
The invention relates to a solar power generation technology, in particular to a solar power supply unit capable of being combined in multiple stages.
Background
The utilization of solar energy has been long, and in addition to large solar power plants, there are many problems in the application of mobile scenes. For example, solar energy in a pastoral area is utilized, the cost is high, the size is large, the power is low, the failure rate is high, and accessories such as a solar panel, a storage battery and an inverter are inconvenient to mount and carry. These all pose a use barrier. Particularly, the solar power generation equipment cannot be combined freely, for example, the solar power generation equipment must be arranged at the maximum capacity in seasons with different illumination intensities, and the solar power generation equipment must be transported in a whole set in seasons with strong illumination intensities. Therefore, when the device is equipped, the cost is high due to the overlarge selected power, the carrying is inconvenient, and the power is small and is not enough. To increase the power, an inverter for converting the power is required. Usually, each set of inverter equipment has a separate sine wave generator, and if a plurality of sets of low-power equipment need to be changed into high-power equipment, complex grid connection is needed, which brings a plurality of problems to use.
Meanwhile, most of the existing electrical equipment adopts a mechanical switch, and poor contact is easy to occur in the places with humidity or corrosive gas. Mechanical switches are susceptible to touch malfunctions, particularly in mobile devices. The existing one-key electronic switch, such as a computer and the like, realizes one-key switch, but has the problem of static power consumption, even if the switch is turned off, part of circuits are still in a working state, and the power supply still consumes power when part of the circuits are in working, so that the switch is not suitable for electrical equipment such as a storage battery, and especially the power of the storage battery can be exhausted when the equipment is not used for a long time. Meanwhile, the existing one-key power on/off circuit also has the problem of rear-end collision (the power on can be repeatedly started after the power off key is pressed for a long time). And if the system is halted by adopting software shutdown, the system cannot be normally shut down. Especially for solar power supply equipment, static power consumption seriously affects the energy consumption and endurance of the solar power supply equipment.
Disclosure of Invention
The invention mainly aims to provide a solar power supply unit capable of being combined in multiple stages so as to solve the problem that the existing solar power generation equipment is inconvenient to carry and cascade.
The invention is realized by the following technical scheme:
a solar power supply unit capable of being combined in multiple stages comprises a solar cell panel, a rechargeable battery, a main control module, an MPPT controller, a charging and discharging controller, an inverter, a sine wave generating module and a synchronizing module, wherein the main control module is connected with the MPPT controller, the charging and discharging controller, the inverter, the sine wave generating module and the synchronizing module;
the solar panel is connected with the charge and discharge controller through the MPPT controller, and the charge and discharge controller is connected with the rechargeable battery and the inverter;
the sine wave generating module is used for generating sine wave signals, the main control module is connected with the sine wave generating module and used for generating corresponding PWM (pulse width modulation) driving signals according to the sine wave signals and driving the inverter through the PWM driving signals to convert the direct-current voltage output by the rechargeable battery through the charge and discharge controller into alternating-current voltage and output the alternating-current voltage;
the solar power supply unit is provided with a unique serial number, and the synchronization module is used for being connected with the synchronization modules of other solar power supply units so as to send the serial number and the sine wave signal of the solar power supply unit to other solar power supply units and receive the serial number and the sine wave signal of other solar power supply units;
when a plurality of solar power supply units are connected in sequence through respective synchronous modules, the main control module of each solar power supply unit selects sine wave signals of the solar power supply units with the same serial number to replace original sine wave signals to generate the PWM driving signals;
the solar power supply unit further comprises a power supply cascade port and a power supply port, wherein the power supply port is connected with the inverter and used for providing electric energy for the load or is connected with power supply cascade ports of other solar power supply units so as to form cascade connection with other solar power supply units.
Furthermore, the solar power supply units with the same serial number are the solar power supply units with the smallest serial number in all the solar power supply units.
Further, the rechargeable battery is a graphene battery.
Further, rechargeable battery, host system, bluetooth communication module, MPPT controller, charge-discharge controller, dc-to-ac converter, sine wave produce module, synchronous module, power port and synchronous module and install solar cell panel's back to carry out waterproof sealing through the back lid of taking the frame.
Furthermore, a folding support frame for supporting the solar power supply unit is mounted on the rear cover.
Further, the inverter is driven by a MOS tube.
Furthermore, the solar energy power supply unit further comprises a Bluetooth communication module, wherein the Bluetooth communication module is connected with the main control module and used for connecting and communicating the solar energy power supply unit and external Bluetooth equipment.
Furthermore, the solar energy power supply unit further comprises an electric energy metering chip, wherein the electric energy metering chip is connected with the main control module and used for measuring the output parameters of the solar energy power supply unit and sending the output parameters to the main control module, and the main control module is used for sending the output parameters to the Bluetooth equipment through the Bluetooth communication module.
Further, a photosensitive diode is arranged in the MPPT controller, is installed on the front side of the solar cell panel and is connected with the main control module through an analog-to-digital conversion module.
Further, the device also comprises an electronic switching circuit;
the electronic on-off circuit comprises a switch S, a polar capacitor C1, a polar capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a diode D1, a triode Q1, an N-channel MOS tube Q3 and a relay K; wherein:
the first end of the switch S is used for being connected with the anode of the rechargeable battery, the second end of the switch S is connected with the anode of a polar capacitor C1 through a resistor R2, the cathode of the polar capacitor C1 is grounded, the resistor R1 is connected between the anode of the polar capacitor C1 and the ground, the anode of the polar capacitor C1 is connected with the base of a triode Q1 through a resistor R3, and the emitter of the triode Q1 is grounded;
the second end of the switch S is connected with the anode of a diode D1, the cathode of a diode D1 is connected with the anode of a polar capacitor C2, the collector of a triode Q1 and the gate of an N-channel MOS tube Q3 through a resistor R4, the cathode of a polar capacitor C2 is grounded, a resistor R5 is connected between the anode of the polar capacitor C2 and the ground, the anode of a polar capacitor C2 is connected with the gate of the N-channel MOS tube Q3, and the source of the N-channel MOS tube Q3 is grounded;
the anode of the rechargeable battery is connected with the rear-stage circuit through a contact switch of a relay K, and is connected with the drain electrode of an N-channel MOS (metal oxide semiconductor) tube Q3 through a coil of the relay K;
the grid of the N-channel MOS tube Q3 is connected to the main loop of the relay K through a resistor R4 and a resistor R6 in sequence;
the capacitance of the polar capacitor C1 is larger than that of the polar capacitor C2, and the resistance of the resistor R2 is smaller than that of the resistor R4.
Compared with the prior art, the solar power supply unit capable of being combined in multiple stages integrates the rechargeable battery, the MPPT controller, the inverter, the charge-discharge controller and other components with the solar panel to form unit type solar power supply equipment, and is convenient to install, use and carry. Meanwhile, a synchronization module is arranged in each solar power supply unit, when a plurality of solar power supply units are connected together through the synchronization module, each solar power supply unit can generate consistent PWM driving signals based on the same sine wave signal through the synchronization module of each solar power supply unit, so that the phases of alternating current voltages output by inverters of each solar power supply unit are consistent, a complex phase detection and tracking grid-connected circuit is not needed, and the condition of fault expansion caused by faults of the synchronization circuit is avoided.
Drawings
FIG. 1 is a schematic diagram illustrating a principle of a solar power unit capable of being combined in multiple stages according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a shape and structure of a solar power unit capable of being combined in multiple stages according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a cascade state of a solar power unit capable of being combined in multiple stages according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a cascading principle of a solar power unit that can be combined in multiple stages according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a MPPT controller in a solar power unit capable of multi-stage combination according to an embodiment of the present invention;
FIG. 6 is a schematic view of a photodiode in a solar power unit capable of multi-stage combination according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an electronic on-off circuit of a solar power unit capable of multi-stage combination according to an embodiment of the present invention;
fig. 8 is a schematic diagram of the switch installation of the electronic switch circuit in the solar power supply unit capable of multi-stage combination according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments and the accompanying drawings.
As shown in fig. 1, the solar power unit capable of being combined in multiple stages according to the embodiment of the present invention includes a solar panel 1, a rechargeable battery 4, a main control module 5, an MPPT controller 2, a charging and discharging controller 3, an inverter 6, a sine wave generating module 8, and a synchronizing module 7. The master control module 5 is connected with the MPPT controller 2, the charge and discharge controller 3, the inverter 6, the sine wave generation module 8 and the synchronization module 7, and is used for controlling the PPT controller, the charge and discharge controller 3, the inverter 6, the sine wave generation module 8 and the synchronization module 7 to work.
This solar power supply unit adopts graphite alkene battery as rechargeable battery 4, improves energy storage density, increases life, reduces the maintenance, reduces the volume, lightens weight. Meanwhile, the rechargeable battery 4, the main control module 5, the bluetooth communication module, the MPPT controller 2, the charge and discharge controller 3, the inverter 6, the sine wave generation module 8, the synchronization module 7, the power port 12, the synchronization module 7 and the like are all installed at the back of the solar cell panel 1, and are sealed in a waterproof manner through the rear cover 17 with a frame. In addition, in order to facilitate the installation and use of the solar power supply unit, a folding support frame 9 for supporting the solar power supply unit is mounted on the rear cover 17, and as shown in fig. 2, the support frame 9 is opened when in use, and the support frame 9 is folded when not in use.
The solar cell panel 1 is connected with the charge and discharge controller 3 through the MPPT controller 2, and the charge and discharge controller 3 is connected with the rechargeable battery 4 and the inverter 6. The maximum power point of the solar cell panel 1 can be tracked by the MPPT controller 2, so that the solar cell panel 1 always charges the battery with the maximum power. As shown in fig. 5, in the MPPT controller 2, the resistors R1 and R2 detect the solar cell voltage, the voltage division a/D (i.e., analog-to-digital conversion module) at the resistors R1 and R2 is connected to the main control module 5 to obtain the solar cell voltage, the a/D (i.e., analog-to-digital conversion module) at the resistor R3 is connected to the main control module 5 to obtain the solar charging current, and the main control module 5 calculates the solar charging maximum power point by controlling the pulse width of the PWM, so as to obtain the maximum power output of the solar energy, thereby fully utilizing the solar power generation. The MPPT controller 2 is further provided with a photodiode 16, and the photodiode 16 is mounted on the front surface of the solar cell panel 1 and connected with the main control module 5 through an analog-to-digital conversion module (i.e., a/D at the resistor R2). The current illumination intensity signal can be tracked in real time through the photosensitive diode 16, the current illumination intensity signal can be sent to the touch module by the analog-to-digital conversion module, and the main control module 5 can judge whether the placing position of the solar cell panel 1 is proper or not according to the current illumination intensity signal so as to realize the maximum utilization of solar energy. As shown in fig. 6, the photodiode 16 may be mounted at the bottom of the black guide 15, and the black guide 15 may be mounted on the front surface of the solar cell panel 1. The photodiode 16 is a photodiode 16 of type ON 9658.
The sine wave generation module 8 is configured to generate a sine wave signal, which is used as a basis for generating a PWM driving signal for driving the inverter 6, and the sine wave signal is converted into a pulse width signal with a constant amplitude and unequal width, and the amplitude of the sine wave signal is associated with the PWM driving signal, and the higher the amplitude of the sine wave is, the higher the PWM duty ratio is. The main control module 5 is connected with the sine wave generating module 8, and is configured to generate a corresponding PWM driving signal according to the sine wave signal, and drive the inverter 6 through the PWM driving signal to convert the dc voltage output by the rechargeable battery 4 through the charge and discharge controller 3 into an ac voltage, and output the ac voltage. The inverter 6 is driven by the MOS tube, and the inverter 6 can output voltage signals of required phases by controlling the conduction and the cut-off time of the MOS tube of the inverter 6.
The sine wave generation module 8 in one solar power supply unit can satisfy the condition that the solar power supply unit is used independently, and when a plurality of solar power supply units are cascaded, in order to ensure the consistency of the output voltage phases of the solar power supply units, as shown in fig. 4, each solar power supply unit should use the sine wave signal of the same solar power supply unit to generate the PWM driving signal for driving the respective inverter 6. Therefore, each solar power supply unit is provided with a unique serial number, and the synchronization module 7 is used for connecting with the synchronization modules 7 of other solar power supply units so as to transmit the serial number and sine wave signal of the solar power supply unit to other solar power supply units and receive the serial number and sine wave signal of other solar power supply units. When a plurality of solar power supply units are connected in sequence through respective synchronization modules 7, the main control module 5 of each solar power supply unit selects the sine wave signal of the solar power supply unit with the same serial number to replace the original sine wave signal to generate a PWM driving signal. Since each solar power supply unit uses the sine wave signal of the same solar power supply unit to generate the PWM driving signal for driving the respective inverter 6, the consistency of the output voltage phase of each solar power supply unit is ensured. Specifically, the solar power supply unit with the same serial number may be the solar power supply unit with the smallest serial number in each solar power supply unit. Through the synchronous module 7, the phases of the output voltages of the cascaded solar power supply units can be consistent without complex phase detection and tracking grid-connected circuits, and meanwhile, the condition of fault expansion caused by the fault of the synchronous circuit is avoided.
The solar power supply unit further comprises a power cascade port 10 and a power port 12, wherein the power port 12 is connected with the inverter 6 and used for supplying electric energy to a load, or is connected with the power cascade port 10 of other solar power supply units so as to form cascade connection with other solar power supply units. Specifically, as shown in fig. 3, during cascading, the cascaded solar power supply units are sequentially connected through a power line 13 and a communication line 14, the power line 13 is used for connecting the power port 12 and the power cascading port 10 of each solar power supply unit, and the communication line 14 is used for transmitting serial numbers and sine wave signals of the solar power supply units. After cascading, the electric appliance can get electricity from the first cascaded solar power supply unit and can also get electricity from the last cascaded solar power supply unit. The power of the electric appliance is within the sum of the powers of all the cascaded solar power supply units. In actual production, the power of each solar power supply unit and the number of cascaded solar power supply units are not limited, and according to different practical application scenarios, there may be solar power supply units with different powers and different numbers of cascaded solar power supply units.
The solar power supply unit further comprises a Bluetooth communication module, wherein the Bluetooth communication module is connected with the main control module 5 and used for connecting and communicating the solar power supply unit with external Bluetooth equipment. Meanwhile, the solar power supply unit further comprises an electric energy metering chip, the electric energy metering chip is connected with the main control module 5 and used for measuring the output parameters of the solar power supply unit and sending the output parameters to the main control module 5, and the main control module 5 is used for sending the output parameters to the Bluetooth device through the Bluetooth communication module. For example, a corresponding application program may be installed in a mobile phone with a bluetooth function, and the main control module 5 sends the output parameters to the mobile phone through the bluetooth communication module, and receives and displays the output parameters through the application program of the mobile phone to prompt the current output state of the solar power supply unit to the relevant operator. The electric energy metering chip is an electric energy metering chip with the model number of ATT7026A, can measure output parameters such as voltage, current, power, electric energy and power factor of the solar power supply unit and carry out overcurrent and overload protection on the output of the solar power supply unit, and can transmit signals to a mobile phone or a computer through Bluetooth (or Wi-Fi) by the main control chip to carry out statistics on generated energy, power consumption, faults and the like. Can also set up the time switch function in the application, through bluetooth control solar energy electrical unit time switch, also can look over solar energy electrical unit's operating condition, electric quantity, can also set up functions such as alarm lamp. In addition to the bluetooth communication module, any other form of wireless communication module may be used instead of the bluetooth communication module, such as a Wi-Fi module or the like.
The solar power supply unit capable of being combined in multiple stages further comprises an electronic switching circuit. As shown in fig. 7, the electronic on/off circuit is a one-key electronic on/off circuit. The electronic switching circuit comprises a switch S, a polar capacitor C1, a polar capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a diode D1, a triode Q1, an N-channel MOS tube Q3 and a relay K; wherein:
the first end of the switch S is used for being connected with the positive electrode of the rechargeable battery 4, the second end of the switch S is connected with the positive electrode of the polar capacitor C1 through a resistor R2, the negative electrode of the polar capacitor C1 is grounded, the resistor R1 is connected between the positive electrode of the polar capacitor C1 and the ground, the positive electrode of the polar capacitor C1 is connected with the base electrode of the triode Q1 through a resistor R3, and the emitting electrode of the triode Q1 is grounded;
the second end of the switch S is connected with the anode of a diode D1, the cathode of a diode D1 is connected with the anode of a polar capacitor C2, the collector of a triode Q1 and the gate of an N-channel MOS tube Q3 through a resistor R4, the cathode of a polar capacitor C2 is grounded, a resistor R5 is connected between the anode of the polar capacitor C2 and the ground, the anode of a polar capacitor C2 is connected with the gate of the N-channel MOS tube Q3, and the source of the N-channel MOS tube Q3 is grounded;
the positive pole of the rechargeable battery 4 is connected with the rear-stage circuit through a contact switch of the relay K, and is connected with the drain electrode of an N-channel MOS tube Q3 through a coil of the relay K;
the grid of the N-channel MOS tube Q3 is connected to the main loop of the relay K through a resistor R4 and a resistor R6 in sequence;
the capacitance of the polar capacitor C1 is larger than that of the polar capacitor C2, and the resistance of the resistor R2 is smaller than that of the resistor R4.
In the electronic switching circuit, after a switch S is pressed, one path of the circuit charges a capacitor C1 through a resistor R2, and the other path of the circuit charges a capacitor C2 through a diode D1 and a resistor R4, because the capacitor C2 is smaller than the capacitor C1, the resistor R4 is larger than the resistor R2, the capacitor C2 is firstly charged to the conducting voltage of an N-channel MOS transistor Q3, and the capacitor C1 is then charged to the conducting voltage of a triode Q1. The switch S is released before the voltage of the capacitor C2 reaches the voltage to enable the N-channel MOS tube Q3 to be conducted, the relay K cannot be electrified, and the mistaken startup caused by accidental touch of the switch S can be prevented. After the switch S is pressed, as time goes on, the gate voltage of the N-channel MOS transistor Q3 gradually rises to turn on the N-channel MOS transistor Q3, the relay K is turned on, and the post-stage circuit L is turned on. After the relay K is electrified and conducted, the N-channel MOS tube Q3 is conducted and self-locked all the time through the resistor R6 and the resistor R4, and starting is achieved. No matter in a power-on state or a power-off state, when the duration time of pressing the switch S is continuously prolonged and exceeds the time required for leading the voltage of the capacitor C1 to be increased to lead the triode Q1 to be conducted, the triode Q1 is conducted to force the N-channel MOS tube Q3 to be cut off, the relay K loses power, the power-off state can be realized, the switch S is pressed for a long time to be turned off, the switch S is released after the power-off state is ended, the triode Q1, the N-channel MOS tube Q3 and the relay K are all in a power-off state, a rear-stage circuit is completely powered off, the power consumption is zero after the power-off state is ended. The switch S is a spring push switch and can be mounted on the rear cover 17 of the solar power supply unit as shown in fig. 8.
The above-described embodiments are merely preferred embodiments, which are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A solar power supply unit capable of being combined in multiple stages is characterized by comprising a solar panel, a rechargeable battery, a main control module, an MPPT controller, a charging and discharging controller, an inverter, a sine wave generation module and a synchronization module, wherein the main control module is connected with the MPPT controller, the charging and discharging controller, the inverter, the sine wave generation module and the synchronization module;
the solar panel is connected with the charge and discharge controller through the MPPT controller, and the charge and discharge controller is connected with the rechargeable battery and the inverter;
the sine wave generating module is used for generating sine wave signals, the main control module is connected with the sine wave generating module and used for generating corresponding PWM (pulse width modulation) driving signals according to the sine wave signals and driving the inverter through the PWM driving signals to convert the direct-current voltage output by the rechargeable battery through the charge and discharge controller into alternating-current voltage and output the alternating-current voltage;
the solar power supply unit is provided with a unique serial number, and the synchronization module is used for being connected with the synchronization modules of other solar power supply units so as to send the serial number and the sine wave signal of the solar power supply unit to other solar power supply units and receive the serial number and the sine wave signal of other solar power supply units;
when a plurality of solar power supply units are connected in sequence through respective synchronous modules, the main control module of each solar power supply unit selects sine wave signals of the solar power supply units with the same serial number to replace original sine wave signals to generate the PWM driving signals;
the solar power supply unit also comprises a power supply cascade port and a power supply port, wherein the power supply port is connected with the inverter and used for providing electric energy for a load or is connected with power supply cascade ports of other solar power supply units so as to form cascade connection with other solar power supply units;
the cascaded solar power supply units are sequentially connected through power lines and communication lines, the power lines are used for connecting power supply ports of the solar power supply units and power supply cascade ports, and the communication lines are used for transmitting serial numbers and sine wave signals of the solar power supply units.
2. The multi-stage combinable solar power supply unit of claim 1, wherein the solar power supply unit of the same serial number is the solar power supply unit of the smallest serial number among the solar power supply units.
3. The multi-stage combinable solar power unit of claim 1, wherein said rechargeable battery is a graphene battery.
4. The multi-stage combinable solar power unit as claimed in claim 1, wherein the rechargeable battery, the main control module, the bluetooth communication module, the MPPT controller, the charge and discharge controller, the inverter, the sine wave generation module, the synchronization module, the power port and the synchronization module are installed at a rear portion of the solar cell panel and are water-tightly sealed by a back cover with a rim.
5. The solar power supply unit capable of being combined in multiple stages as claimed in claim 4, wherein a folding support frame for supporting the solar power supply unit is installed on the rear cover.
6. The solar power supply unit capable of multistage combination according to claim 1, wherein the inverter is driven by a MOS transistor.
7. The solar power supply unit capable of being combined in multiple stages as claimed in claim 1, further comprising a bluetooth communication module, wherein the bluetooth communication module is connected with the main control module, and is used for connecting and communicating the solar power supply unit with an external bluetooth device.
8. The solar power supply unit capable of being combined in multiple stages as claimed in claim 7, further comprising an electric energy metering chip connected to the main control module for measuring the output parameters of the solar power supply unit and sending the output parameters to the main control module, wherein the main control module is used for sending the output parameters to the bluetooth device through the bluetooth communication module.
9. The multi-stage combinable solar power unit as claimed in claim 1, wherein a photodiode is disposed in the MPPT controller, and the photodiode is mounted on the front surface of the solar panel and connected to the main control module through an analog-to-digital conversion module.
10. The solar power supply unit of claim 1, further comprising an electronic switching circuit;
the electronic on-off circuit comprises a switch S, a polar capacitor C1, a polar capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a diode D1, a triode Q1, an N-channel MOS tube Q3 and a relay K; wherein:
the first end of the switch S is used for being connected with the anode of the rechargeable battery, the second end of the switch S is connected with the anode of a polar capacitor C1 through a resistor R2, the cathode of the polar capacitor C1 is grounded, the resistor R1 is connected between the anode of the polar capacitor C1 and the ground, the anode of the polar capacitor C1 is connected with the base of a triode Q1 through a resistor R3, and the emitter of the triode Q1 is grounded;
the second end of the switch S is connected with the anode of a diode D1, the cathode of a diode D1 is connected with the anode of a polar capacitor C2, the collector of a triode Q1 and the gate of an N-channel MOS tube Q3 through a resistor R4, the cathode of a polar capacitor C2 is grounded, a resistor R5 is connected between the anode of the polar capacitor C2 and the ground, the anode of a polar capacitor C2 is connected with the gate of the N-channel MOS tube Q3, and the source of the N-channel MOS tube Q3 is grounded;
the anode of the rechargeable battery is connected with the rear-stage circuit through a contact switch of a relay K, and is connected with the drain electrode of an N-channel MOS (metal oxide semiconductor) tube Q3 through a coil of the relay K;
the grid of the N-channel MOS tube Q3 is connected to the main loop of the relay K through a resistor R4 and a resistor R6 in sequence;
the capacitance of the polar capacitor C1 is larger than that of the polar capacitor C2, and the resistance of the resistor R2 is smaller than that of the resistor R4.
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| CN109066955B true CN109066955B (en) | 2021-03-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201789448U (en) * | 2010-09-16 | 2011-04-06 | 扬州天华光电科技有限公司 | Solar photovoltaic generation system capable of running off-grid |
| CN104160577A (en) * | 2012-01-17 | 2014-11-19 | 英飞凌科技奥地利有限公司 | Power converter circuit, power supply system and method |
| CN205232185U (en) * | 2015-09-25 | 2016-05-11 | 珠海奔图电子有限公司 | Power supply switch control circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6914418B2 (en) * | 2003-04-21 | 2005-07-05 | Phoenixtec Power Co., Ltd. | Multi-mode renewable power converter system |
| EP2624433A1 (en) * | 2012-02-03 | 2013-08-07 | ABB Research Ltd. | Non-isolated PV inverter system with ground current mitigation |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201789448U (en) * | 2010-09-16 | 2011-04-06 | 扬州天华光电科技有限公司 | Solar photovoltaic generation system capable of running off-grid |
| CN104160577A (en) * | 2012-01-17 | 2014-11-19 | 英飞凌科技奥地利有限公司 | Power converter circuit, power supply system and method |
| CN205232185U (en) * | 2015-09-25 | 2016-05-11 | 珠海奔图电子有限公司 | Power supply switch control circuit |
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| CN109066955A (en) | 2018-12-21 |
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