CN113937838B - New energy display screen - Google Patents
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- CN113937838B CN113937838B CN202011306003.XA CN202011306003A CN113937838B CN 113937838 B CN113937838 B CN 113937838B CN 202011306003 A CN202011306003 A CN 202011306003A CN 113937838 B CN113937838 B CN 113937838B
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- 238000010248 power generation Methods 0.000 claims abstract description 49
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 2
- 238000005286 illumination Methods 0.000 abstract description 5
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 230000001934 delay Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Classifications
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
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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
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
- H02S10/12—Hybrid wind-PV energy systems
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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
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A new energy display screen displays by utilizing wind energy and solar energy power generation. The new energy display screen comprises a wind power supply system and a photovoltaic power supply system, wherein the wind power supply system and the photovoltaic power supply system comprise a first storage battery, a second storage battery and a control unit, the first storage battery is used for normally storing electric energy, the second storage battery is used for supplementing and storing electric energy, the control unit comprises a voltage detection circuit and a control circuit, the voltage detection circuit is used for monitoring the charging voltage of the first storage battery in real time, and when the first storage battery is full, the control circuit is automatically informed to generate a control signal, and the second storage battery is started. The power supply system disclosed by the application can adapt to the change conditions of traffic flow and solar illumination, improves the utilization rate of the storage battery, delays the service life of the storage battery, saves the replacement cost of the storage battery, fully utilizes new energy sources to supply power to the display screen, and is energy-saving and environment-friendly.
Description
Technical Field
The application relates to a new energy display screen, in particular to an advertising or advertising screen which is powered by wind energy and solar energy.
Background
With the rapid development of the economy in China, vehicles are also rapidly rising as a public service. In recent years, however, traffic accidents frequently occur, particularly on highways. Through analysis, the reasons are mainly potential safety hazards of the expressway, and a driver cannot predict factors such as road icing, traffic congestion, road wetness, road fog and the like in advance to cause traffic accidents; the high-speed display screen is used for reminding the driver of the road condition in front of the driver.
The principle of wind power generation is that wind power is utilized to drive windmill blades to rotate, and then the rotating speed is increased through a speed increaser so as to promote a generator to generate electricity. According to the current wind power generator technology, the generation of electricity can be started at a breeze speed (breeze degree) of about three meters per second. Wind power generation is forming a hot tide in the world, because wind power generation has no fuel problems and does not generate radiation or air pollution.
Wind power generation is popular in finland, denmark and other countries; china is also promoted in western regions. The small wind power generation system has high efficiency, but is not composed of only one generator head, but a small system with a certain technological content: wind power generator, charger, digital inverter. The wind driven generator consists of a machine head, a rotating body, a tail wing and blades. The wind power generation system comprises a wind power generator, a rectifier, a control circuit, a storage battery, an inverter and a load, and the structure and the working principle of the wind power generation system belong to the known technology and are not described in excess.
Solar energy is used as clean energy source and is widely used at home and abroad. The principle of the solar energy power supply device is mainly that the photoelectric effect of a photovoltaic cell panel is utilized to convert solar energy into electric energy so as to supply working power to a load. Solar power generation is common in various fields of people's life, for example, at present, in places where people are rare, it is very practical to utilize solar energy to generate power, because in places where people are rare, manpower and material resources are wasted by means of power transmission through rack wires, and solar energy is used to generate power, so that power can be supplied from place to place without erecting electric power facilities such as wires, and thus electric power facilities can be saved.
China is a vast country with a plurality of expressways in national planning, and has wide national span, cities are connected through expressways, and zones between cities are usually rare people and cigarettes; therefore, the photovoltaic panel and wind energy are used for generating electricity on the expressway. On the expressway, in order to prompt road conditions or advertise, display screens for displaying information are erected, and the display screens are scattered, and if centralized power supply is difficult, the display screens are not economical. Therefore, the power supply problem of the information display screen on the expressway is to be solved. Because the vehicle running speed on the expressway is generally higher, wind power can be generated, wind power formed by the wind power is not negligible, the expressway is usually in an open area, solar power generation by installing a photovoltaic cell panel is completely feasible, and the two energy sources belong to clean energy sources, have no pollution to the environment and accord with the new energy policy advocated by the nation, so that a scheme for supplying power for new energy sources to a display screen is necessary.
In addition, the traffic flow on the expressway is changed along with time, the traffic flow is different in different months in one year, the traffic flow is also different in different time periods in the same day, the traffic flow is large in daytime peak period, and the traffic flow is small in other time periods. The vehicle flow is different, the generated wind energy is also different, and the generated electric quantity is also different; in the same way, the sun illumination is continuously changed throughout the year, the illumination in summer is strong, the temperature is high, the generated solar energy is more, the illumination in winter is weak, the temperature is first, and the generated solar energy is less; the solar energy generated in sunny days is more, and the solar energy generated in cloudy days or rainy days is less, so that the method is suitable for the change condition of traffic flow or sunlight, and the method is also a technical problem to be solved for storing generated wind power or photo-generated electricity according to the change condition of traffic flow or sunlight.
Disclosure of Invention
The application provides a display screen of a highway, which utilizes new energy to supply power, and provides power required by work for the display screen along the way through a wind power generation device and a solar power generation device which are arranged on a green belt in the middle of the highway; the application can be suitable for storing the generated wind power or photo-generated electricity under different traffic flow and different illumination conditions, thereby improving the utilization rate of resources and saving the cost.
The application adopts the following technical scheme:
the new energy display screen can be used on highways and displays by utilizing electric energy obtained by converting wind energy and solar energy; the new energy display screen comprises: the system comprises a wind power supply system, a photovoltaic power supply system and a display screen; the wind power supply system comprises a wind power generation device and a first current processing circuit; the photovoltaic power supply system comprises a solar panel and a second current processing circuit; the wind power generation device comprises a shell (5), an inner rotating shaft (2), an outer rotating shaft (4) and fan blades (1); the shell (5) is cylindrical, and the inner rotating shaft (2) is rotatably fixed at the central shaft of the shell (5); the outer rotating shaft (4) is rotatably sleeved on the outer surface of the inner rotating shaft (2); the outer rotating shaft (4) and the inner rotating shaft (2) can rotate together; the inner rotating shaft (2) is fixedly connected with a rotor of the generator; a plurality of fan blades (1) are arranged on the outer surface of the external rotating shaft, and the fan blades (1) are arc-shaped blades; the outer wall of the shell (5) is provided with a plurality of through grooves, the through grooves extend along the vertical direction of the outer wall of the shell (5), the through grooves are used for air intake, the air entering the shell (5) through the through grooves pushes the fan blades (1) to rotate, the rotation of the fan blades (1) drives the outer rotating shaft (4) to rotate, and then the inner rotating shaft (2) is driven to rotate; the method is characterized in that:
the first current processing circuit includes: the device comprises a rectifier, a filter, a voltage detection circuit, a first storage battery, a second storage battery, an output control circuit and a control circuit; the output end of the wind power generation device is connected with the input end of the rectifier;
the rectifier is used for converting alternating current generated by the wind power generation device into unidirectional pulse power with the same direction and the same size, and the output end of the rectifier is connected with the input end of the filter;
the filter is used for filtering the electric pulse output by the rectifier, and the output end of the filter is connected with the input end of the voltage detection circuit through a node (N);
the voltage detection circuit is used for detecting the charging voltage of the first storage battery, stopping charging the first storage battery when detecting that the charging voltage of the first storage battery exceeds a preset voltage, and generating a signal so that the control circuit generates a control signal for starting the second storage battery to charge; the output end of the voltage detection circuit is connected with one end of the first storage battery, and the output end of the voltage detection circuit is connected with the control circuit;
the control circuit is used for generating control signals for controlling the second storage battery and the output control circuit so as to control the working states of the second storage battery and the output control circuit;
the first storage battery is a main storage battery and is used for storing charges generated by the wind power generation device; the second storage battery is a supplementary storage battery and is used for continuously storing the electric charge generated by the wind power generation device after the first storage battery is full;
the output control circuit is used for controlling the output of the first storage battery and the second storage battery and is used for supplying power to the display screen.
Preferably, the control circuit is electrically connected with the output control circuit and the second storage battery, and is used for respectively controlling the work of the output control circuit and the second storage battery by outputting the first control signal and the second control signal.
Preferably, one end of the second storage battery is electrically connected to the node (N), and one end of the output control circuit is also electrically connected to the node (N).
Preferably, the output end of the wind power generation device is electrically connected with the input end of a rectifier, and the output end of the rectifier is connected with a node (N) after passing through a filter;
the first pole of the first storage battery is connected with the output end of the voltage detection circuit, the input end of the voltage detection circuit is connected with the node (N), and the second pole of the first storage battery is connected with the first voltage (V1);
the second pole of the second storage battery is connected with a second voltage (V2), the first pole of the second storage battery is connected with the second pole of the second switching transistor (M2), and the first pole of the second switching transistor (M2) is connected with a node (N);
the output control circuit comprises a first switching transistor (M1), a first pole of the first switching transistor (M1) is connected with a node (N), and a second pole of the first switching transistor is connected with a load;
the control electrode of the first switching transistor (M1) is connected with a first control signal end, and the control electrode of the second switching transistor (M2) is connected with a second control signal end;
the control circuit is connected with the voltage detection circuit, the first control signal end and the second control signal end and is used for generating a first control signal and a second control signal, the first control signal is used for controlling the first switching transistor (M1), and the second control signal is used for controlling the second switching transistor (M2).
Preferably, the second storage battery is a storage battery pack formed by connecting a plurality of storage batteries in parallel.
Preferably, the second storage battery comprises a first sub storage battery (C21), a second sub storage battery (C22) and a third sub storage battery (C23), wherein the positive electrode of the first sub storage battery (C21) is connected with the second electrode of the first-stage switching transistor (M21), the positive electrode of the second sub storage battery (C22) is connected with the second electrode of the second-stage switching transistor (M22), and the positive electrode of the third sub storage battery (C23) is connected with the second electrode of the third-stage switching transistor (M23).
The cathodes of the first sub storage battery (C21), the second sub storage battery (C22) and the third sub storage battery (C23) are connected with the second voltage end.
The second pole of the first stage switching transistor (M21) is connected with the first pole of the second stage switching transistor (M22), and the second pole of the second stage switching transistor (M22) is connected with the first pole of the third stage switching transistor (M23), so that the first stage switching transistor (M21), the second stage switching transistor (M22) and the third stage switching transistor (M23) are connected end to end.
The control poles of the first stage switching transistor (M21), the second stage switching transistor (M22) and the third stage switching transistor (M23) are respectively connected with a first sub-control signal (G21), a second sub-control signal (G22) and a third sub-control signal (G23).
Preferably, the first sub-control signal G21, the second sub-control signal G22 and the third sub-control signal G23 are the same or different.
Preferably, the photovoltaic power supply system includes: the solar energy power generation device comprises a solar cell panel, a third storage battery, a fourth storage battery, a second output control circuit, a second voltage detection circuit and a second control circuit; the output end of the solar panel is connected to the second node and connected with a second voltage detection circuit, and the output end of the second voltage detection circuit is connected with the first pole of the third storage battery and the second control circuit; the fourth storage battery is connected with the second node and the second control circuit; the second output control circuit is connected with the second node and the second control circuit.
Preferably, the second voltage detection circuit is configured to detect a charging voltage of the third battery, and stop charging the third battery when the charging voltage of the third battery exceeds a preset voltage, and generate a signal so that the second control circuit generates a control signal for starting charging of the fourth battery.
Compared with the prior art, the application makes the following technical contributions to obtain the following technical effects, and belongs to the innovation of the application:
1. according to the change condition of wind power and solar energy, a combination mode of a main storage battery and a secondary storage battery is adopted, under the condition that wind power and/or solar energy are insufficient in electricity generation, only one main storage battery is used for charging, under the condition that wind power and/or solar energy are excessive in electricity generation, the secondary storage battery is automatically started for supplementing and charging under the condition that the main storage battery is full of electricity, so that the repeated charging of one high-capacity storage battery in the prior art can be avoided, the service life of the high-capacity storage battery is easily shortened, and the cost loss caused by replacing a new high-capacity storage battery is avoided;
2. the voltage detection circuit is used for detecting the charging voltage of the main storage battery in real time, when the charging voltage of the main storage battery is detected to exceed the preset voltage, namely, the auxiliary storage battery is automatically controlled to be started after the main storage battery is detected to be full, so that redundant charges are stored in the auxiliary storage battery, the voltage detection circuit can detect the charging voltage of the main storage battery in real time, and simultaneously, signals are sent to the control circuit under the condition of full charge, and the control circuit controls the auxiliary storage battery to be started. The voltage detection circuit, the main battery (first battery), the control circuit and the auxiliary battery (second battery) are integrated, interact and are not separable.
3. The auxiliary storage battery adopts a mode of connecting the multi-stage sub storage batteries in series or in parallel, and realizes simultaneous charging or staged charging of the multi-stage sub storage battery through the same or different control signals, so that the auxiliary storage battery can be suitable for the supplementary charging under the condition of different generated energy, can be more suitable for the condition of different generated energy, and saves the auxiliary storage battery.
Drawings
FIG. 1 is a perspective view of a power generation section of a highway wind power plant;
FIG. 2 is a schematic view of the exterior shaft and blades of the highway wind power plant;
FIG. 3 is a schematic illustration of the placement of a highway wind power plant;
FIG. 4 is a schematic diagram of a highway wind power system;
FIG. 5 is a partial block diagram of a current handling circuit;
FIG. 6 is a circuit diagram of a voltage detection circuit;
fig. 7 is one of the embodiments of the second battery;
fig. 8 is a schematic diagram of a highway photovoltaic power system.
The wind power generation device comprises a fan blade 1, an inner rotating shaft 2, a cavity 3, an outer rotating shaft 4, a shell 5, a through groove 51, a green belt 6, a wind power generation device 7, a display screen 8 and a first current processing circuit 9.
Detailed Description
As shown in fig. 1-2, the wind power generation device 7 of the present application comprises a plurality of blades 1, an outer rotating shaft 4, an inner rotating shaft 2, and a housing 5. The casing 5 is cylindric metal cylinder, and the center axis department of casing installs the pivot, the pivot includes inside pivot 2 and outside pivot 4, outside pivot 4 cup joints inside pivot 2's outside, drives inside pivot 2 rotation through the rotation of outside pivot 4, thereby the pivot fixed connection of inside pivot and the rotor of big motor drives the rotor rotation of generator through the rotation of inside pivot 2 to produce the electric current by the generator. The fan is characterized in that a plurality of fan blades are arranged on the outer rotating shaft 4, the fan blades 1 are arc-shaped blades in the vertical direction, and wind acts on the fan blades 1, so that the fan blades 1 are driven to move, and the movement of the fan blades 1 drives the outer rotating shaft to rotate. A cavity 3 is formed between the outer rotating shaft 4 and the outer wall of the shell, and the fan blades are arranged in the cavity 3. The outer wall of the cavity 3 is provided with a plurality of through grooves in the vertical direction, and the through grooves are suitable for entering wind generated when an automobile runs on a highway and passes through the power generation device, so that the fan blades 4 are driven to move.
As shown in fig. 3, the wind power generation device 7 is installed in a central green belt of a highway or at both sides of the highway. And warning screens 8 are arranged at the two sides of the middle green belt or the road of the expressway. The wind power generation devices 7 are located in a range of one kilometer in front of and behind the warning screen 8, and power generated by the wind power generation devices 7 is transmitted to the display screen 8, so that working power is provided for display of the display screen 8.
The shell 5 of the wind power generation device 7 is fixedly arranged on the ground, and wind power generated when an automobile passes through drives the fan blades to rotate. In order to increase the wind speed generated when the automobile passes by and ensure that the blades can rotate, an air guide device can be arranged on the outer wall of the shell 5. The specific structure of the air guiding device may be referred to in my previous application, and will not be described in detail herein.
Next, it will be described that if the current generated by the wind power generation device is processed and then supplied to the display screen. As shown in fig. 4, the wind power supply system of the present application includes a current processing circuit 9, and the current processing circuit 9 is configured to process a current generated by a wind power generation device and provide the processed current to a display screen, so as to provide a stable working current to the display screen. The circuit processing circuit 9 includes a rectifier, a filter, a voltage detection circuit, a first battery, a second battery, a control circuit, and an output control circuit. The rectifier is used for changing alternating current generated by the wind power generation device into unidirectional pulse power with the same direction and the same size, and the unidirectional pulse power passes through the filter to charge the storage battery. The storage battery includes a first storage battery as a main storage battery and a second storage battery as an auxiliary storage battery. The current firstly charges the first storage battery, and then charges the second storage battery if the first storage battery is full, wherein the second storage battery can be a single storage battery or a storage battery pack formed by a plurality of storage batteries connected in parallel or in series. Since the traffic flow is different for each period of time on the highway, for example, during off-peak hours, the traffic flow is low and the current generated by the wind power generation device is low, the first storage battery is sufficient to store the generated electricity; in peak period, the generated current is large, the first storage battery is easy to be fully charged, and the second storage battery needs to be started for charging. And the economical effects are different using one large-capacity storage battery and using the same-capacity battery pack composed of the first and second storage batteries. If only one high-capacity storage battery is used, the service life of the storage battery is greatly shortened when the storage battery is always in a working state, and a battery pack consisting of the first storage battery and the second storage battery is adopted, so that the second storage battery is started to be charged when required, the service life of the second storage battery is prolonged, only the first storage battery with small capacity is required to be replaced, and the storage battery is obviously more economical than the storage battery with large capacity, and the storage battery is one of innovation points of the application. The output control circuit is used for outputting the current in the first storage battery and the second storage battery so as to supply power for the display screen. The voltage detection circuit is used for detecting the charging voltage of the first storage battery, and if the voltage detection circuit detects that the voltage of the first storage battery in the charging process does not reach the preset charging voltage, the voltage detection circuit is continuously in a conducting state, so that the current generated by the wind power generation device continuously charges the first storage battery. If the voltage detection circuit detects that the voltage of the first storage battery in the charging process reaches a preset charging voltage, namely the first storage battery is full, the voltage detection circuit cuts off output at the moment, and the first storage battery is not charged any more. The voltage detection circuit cuts off the output, so that the control circuit generates a control signal to control the corresponding switch transistor to be turned on, and the current generated by the wind power generation device charges the second storage battery.
As shown in fig. 5, the current filtered by the filter circuit is input to the node N, and then is input to the first pole of the first storage battery C1 after passing through the voltage detection circuit, and the second pole of the first storage battery is connected to the voltage V1; the second pole of the second battery is connected to the voltage V2, the first pole thereof is connected to the second pole of the second switching transistor M2, and the first pole of the second switching transistor M2 is connected to the node N. The output control circuit comprises a first switching transistor M1, a first pole of the first switching transistor M1 being connected to the node N, and a second pole thereof being connected to the load. The control electrode of the second switching transistor M2 is connected to the second control signal G2, and when the first storage battery is detected to be full, the control circuit generates the second control signal G2, so that the second switching transistor M2 is turned on, and the second storage battery is electrically connected to the node N, so that the second storage battery is charged. After the preset charging time is over, the control circuit generates a first control signal G1, so that the first switch transistor M1 is turned on, and the first storage battery and the second storage battery output currents to the outside.
As shown in fig. 6, the voltage detection circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first transformer T1, a second transformer T2, a first diode D1, a second diode D2, and a third switching transistor M3. The resistances of the first resistor R1 and the second resistor R2 are equal, and the resistances of the other resistors may be set according to actual situations, which will not be described in detail herein. The first resistor R1 and the second resistor R2 are connected in series and then connected into a circuit (between the positive electrode and the negative electrode of the power supply), and the third resistor R3 and the first transformer T1 are connected in series and then connected into the circuit. The first section of the first resistor R1 is connected with the positive electrode of the power supply, and the second end of the first resistor R1 is connected with the second end of the first transformer T1. The first end of the first transformer T1 is connected with the second end of the third resistor; the first end of the first transformer T1 is simultaneously connected with the anode of the first diode D1. The negative pole of first diode D1 connects the second end of second transformer T2, and the first end of second transformer T2 connects the second end of fifth resistance R5, and the first end of fifth resistance connects the control pole of third switching transistor M3. The first end of the fifth resistor R5 is simultaneously connected with the second end of the fourth resistor R4, the first end of the fourth resistor R4 is connected with the first pole of the third switching transistor M3, the second pole of the third switching transistor M3 is connected with the positive pole of the second diode D2, the negative pole of the second diode D2 is connected with the input end of the first storage battery, and the negative pole of the second diode D2 is simultaneously connected with the controller.
The above is a structural description of the voltage detection circuit, and the operation principle of the voltage detection circuit is described below. When the first storage battery is charged by the current generated by the wind power generation device, the first storage battery is charged by the third switching transistor M3 and the second diode D2, and if the charging voltage of the first storage battery does not reach the preset working voltage (for example, 36V), the third switching transistor M3 is always kept in a conducting state. If the voltage of the first storage battery reaches the predetermined operating voltage, the voltage of the intermediate point between the first resistor R1 and the second resistor R2 is greater than half of the predetermined operating voltage, so that the first transformer T1 is turned on, and the second transformer is turned off, so that the third switching transistor M3 is turned off, and the charging of the first storage battery is stopped. Since the output of the voltage detection circuit is zero, the controller generates a second control signal G2 (for example, a low level signal), and the second control signal G2 controls the second switching transistor M2 to be turned on, so as to start charging the second storage battery.
The second battery may be a single battery or a plurality of batteries connected in series or in parallel. The following describes a second battery composed of parallel batteries. As shown in fig. 7, the second battery includes three-stage sub-batteries: the positive electrode of the first sub-storage battery C21, the second sub-storage battery C22 and the third sub-storage battery C23 is connected with the second electrode of the first-stage switching transistor M21, the positive electrode of the second sub-storage battery C22 is connected with the second electrode of the second-stage switching transistor M22, and the positive electrode of the third sub-storage battery C23 is connected with the second electrode of the third-stage switching transistor M23. The cathodes of the first sub-battery C21, the second sub-battery C22 and the third sub-battery C23 are all connected to the second voltage terminal. The second pole of the first stage switching transistor M21 is connected to the first pole of the second stage switching transistor M22, and the second pole of the second stage switching transistor M22 is connected to the first pole of the third stage switching transistor M23, so that the first stage switching transistor M21, the second stage switching transistor M22, and the third stage switching transistor M23 are connected end to end. The control electrodes of the first stage switching transistor M21, the second stage switching transistor M22 and the third stage switching transistor M23 are respectively connected to the first sub-control signal G21, the second sub-control signal G22 and the third sub-control signal G23. The first sub-control signal G21, the second sub-control signal G22 and the third sub-control signal G23 may be the same or different. In the same case, the first-stage switching transistor M21, the second-stage switching transistor M22, and the third-stage switching transistor M23 are simultaneously turned on or off in response to the same control signal, so that the first sub-battery C21, the second sub-battery C22, and the third sub-battery C23 are simultaneously charged. In the case of different control signals, the first-stage switching transistor M21, the second-stage switching transistor M22, and the third-stage switching transistor M23 are not turned on at the same time, and thus the switching of the first-stage switching transistor M21, the second-stage switching transistor M22, and the third-stage switching transistor M23 can be controlled according to actual needs, so that the number of sub-batteries to be used can be selected according to actual needs. For example, during a continuous high-flow vehicle flow period, all three sub-storage batteries can be selected to be started for use; and in the case of medium flow, one or both sub-batteries may be selected to be turned on for charging.
The above description is given of the case of wind power generation. The photovoltaic power generation will be described below. As shown in fig. 8, the photovoltaic power supply system includes a solar panel, a third battery, a fourth battery, a second output control circuit, a second voltage detection circuit, and a second control circuit. Therefore, compared with the wind power generation system, the photovoltaic power generation system has simpler structure, omits a rectifier and a filter, and is determined by the characteristics of solar power generation. The solar light irradiates the solar cell panel to generate electricity by light, so that current is generated (the current is processed, a specific processing circuit belongs to common knowledge in the field of photovoltaic power generation, and the application is not described here, and mainly describes how to store the generated current), and the generated current is input into a third storage battery through a second voltage detection circuit, so that generated charge is stored. The third storage battery is a main storage battery, the fourth storage battery is an auxiliary battery, and the irradiation intensity is different due to the fact that the sun light irradiates in different seasons, different months and different time periods in the same day. The charging condition of the third storage battery is different due to different irradiation intensities, the sun light is sufficient and the temperature is high in summer and autumn, the generated photo-generated charge amount is large, and the third storage battery is easy to be filled, so that the fourth storage battery can be used for storing the rest photo-generated charge, and in winter and spring, the sun light is insufficient and the temperature is low, the generated photo-generated charge amount is small, and the third storage battery is not sufficiently charged, or the third storage battery is used for storing the charge. Therefore, the structure of the third storage battery and the fourth storage battery can be suitable for storing photo-generated charges in different seasons or different time periods, is more suitable for environmental changes than the structure of storing by using a single storage battery, is more economical and environment-friendly, and has the same reason as the reason of using the first storage battery and the second storage battery in the wind power supply system, and is not described in detail herein. The structures of the third and fourth batteries, the second voltage detection circuit, and the second control circuit are the same as those of the first battery, the second battery, the voltage detection circuit, the control circuit, and the output control circuit in the wind power supply system, and the connection relationships are not repeated here.
Claims (8)
1. The new energy display screen can be used on highways and displays by utilizing electric energy obtained by converting wind energy and solar energy; the new energy display screen comprises: the system comprises a wind power supply system, a photovoltaic power supply system and a display screen; the wind power supply system comprises a wind power generation device and a first current processing circuit; the photovoltaic power supply system comprises a solar panel and a second current processing circuit; the wind power generation device comprises a shell (5), an inner rotating shaft (2), an outer rotating shaft (4) and fan blades (1); the shell (5) is cylindrical, and the inner rotating shaft (2) is rotatably fixed at the central shaft of the shell (5); the outer rotating shaft (4) is rotatably sleeved on the outer surface of the inner rotating shaft (2); the outer rotating shaft (4) and the inner rotating shaft (2) can rotate together; the inner rotating shaft (2) is fixedly connected with a rotor of the generator; a plurality of fan blades (1) are arranged on the outer surface of the external rotating shaft, and the fan blades (1) are arc-shaped blades; the outer wall of the shell (5) is provided with a plurality of through grooves, the through grooves extend along the vertical direction of the outer wall of the shell (5), the through grooves are used for air intake, the air entering the shell (5) through the through grooves pushes the fan blades (1) to rotate, the rotation of the fan blades (1) drives the outer rotating shaft (4) to rotate, and then the inner rotating shaft (2) is driven to rotate; the method is characterized in that:
the first current processing circuit includes: the device comprises a rectifier, a filter, a voltage detection circuit, a first storage battery, a second storage battery, an output control circuit and a control circuit; the output end of the wind power generation device is connected with the input end of the rectifier;
the rectifier is used for converting alternating current generated by the wind power generation device into unidirectional pulse power with the same direction and the same size, and the output end of the rectifier is connected with the input end of the filter;
the filter is used for filtering the electric pulse output by the rectifier, and the output end of the filter is connected with the input end of the voltage detection circuit through a node (N);
the voltage detection circuit is used for detecting the charging voltage of the first storage battery, stopping charging the first storage battery when detecting that the charging voltage of the first storage battery exceeds a preset voltage, and generating a signal so that the control circuit generates a control signal for starting the second storage battery to charge; the output end of the voltage detection circuit is connected with one end of the first storage battery, and the output end of the voltage detection circuit is connected with the control circuit;
the control circuit is used for generating control signals for controlling the second storage battery and the output control circuit so as to control the working states of the second storage battery and the output control circuit;
the first storage battery is a main storage battery and is used for storing charges generated by the wind power generation device; the second storage battery is a supplementary storage battery and is used for continuously storing the electric charge generated by the wind power generation device after the first storage battery is full;
the output control circuit is used for controlling the output of the first storage battery and the second storage battery and supplying power to the display screen;
the output end of the wind power generation device is electrically connected with the input end of the rectifier, and the output end of the rectifier is connected with a node (N) after passing through a filter; the first pole of the first storage battery is connected with the output end of the voltage detection circuit, the input end of the voltage detection circuit is connected with the node (N), and the second pole of the first storage battery is connected with the first voltage (V1);
the second pole of the second storage battery is connected with a second voltage (V2), the first pole of the second storage battery is connected with the second pole of the second switching transistor (M2), and the first pole of the second switching transistor (M2) is connected with a node (N);
the output control circuit comprises a first switching transistor (M1), a first pole of the first switching transistor (M1) is connected with a node (N), and a second pole of the first switching transistor is connected with a load;
the control electrode of the first switching transistor (M1) is connected with a first control signal end, and the control electrode of the second switching transistor (M2) is connected with a second control signal end;
the control circuit is connected with the voltage detection circuit, the first control signal end and the second control signal end and is used for generating a first control signal and a second control signal, the first control signal is used for controlling the first switching transistor (M1), and the second control signal is used for controlling the second switching transistor (M2).
2. A display screen as recited in claim 1, wherein: the control circuit is electrically connected with the output control circuit and the second storage battery and is used for respectively controlling the work of the output control circuit and the second storage battery by outputting the first control signal and the second control signal.
3. A display screen according to any one of claims 1-2, wherein: one end of the second storage battery is electrically connected with the node (N), and one end of the output control circuit is also electrically connected with the node (N).
4. A display screen as claimed in claim 3, wherein: the second storage battery is a storage battery pack formed by connecting a plurality of storage batteries in parallel.
5. A display screen as recited in claim 4, wherein: the second storage battery comprises a first sub storage battery (C21), a second sub storage battery (C22) and a third sub storage battery (C23), wherein the positive electrode of the first sub storage battery (C21) is connected with the second electrode of the first-stage switching transistor (M21), the positive electrode of the second sub storage battery (C22) is connected with the second electrode of the second-stage switching transistor (M22), and the positive electrode of the third sub storage battery (C23) is connected with the second electrode of the third-stage switching transistor (M23);
the cathodes of the first sub storage battery (C21), the second sub storage battery (C22) and the third sub storage battery (C23) are connected with a second voltage end;
the second pole of the first-stage switching transistor (M21) is connected with the first pole of the second-stage switching transistor (M22), and the second pole of the second-stage switching transistor (M22) is connected with the first pole of the third-stage switching transistor (M23), so that the first-stage switching transistor (M21), the second-stage switching transistor (M22) and the third-stage switching transistor (M23) are connected end to end;
the control poles of the first stage switching transistor (M21), the second stage switching transistor (M22) and the third stage switching transistor (M23) are respectively connected with a first sub-control signal (G21), a second sub-control signal (G22) and a third sub-control signal (G23).
6. A display screen as recited in claim 5, wherein: the first sub-control signal (G21), the second sub-control signal (G22) and the third sub-control signal (G23) are identical or different.
7. A display screen as recited in claim 1, wherein: the photovoltaic power supply system includes: the solar cell panel, the third storage battery, the fourth storage battery, the second output control circuit, the second voltage detection circuit and the second control circuit; the output end of the solar panel is connected to the second node and connected with a second voltage detection circuit, and the output end of the second voltage detection circuit is connected with the first pole of the third storage battery and the second control circuit; the fourth storage battery is connected with the second node and the second control circuit; the second output control circuit is connected with the second node and the second control circuit.
8. The display screen of claim 7, wherein: the second voltage detection circuit is used for detecting the charging voltage of the third storage battery, and when the charging voltage of the third storage battery exceeds a preset voltage, the third storage battery is stopped being charged, and meanwhile signals are generated so that the second control circuit generates control signals for starting the fourth storage battery to be charged.
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