Solar street lamps use efficient monocrystalline, polycrystalline silicon solar battery power, USES the type sealed and maintenance-free battery storage power, with high efficiency and energy saving LED lighting, and USES the advanced charge and discharge and the lighting control circuit, has the properties of reliable, high luminous efficiency, brightness, easy installation, without laying cable wire, no need for ac electric energy and electricity, the dc power supply, light control, safe and reliable, energy saving, economy, environmental protection,Practical (according to the configuration and model, charging a day can be used for 3 ~ 7 days)) long life (solar pool can be used for 15 ~ 20 years, battery can be used for 5 ~ 7 years), is the future of outdoor lighting development direction and lighting lamps a rookie.Solar panels: solar panels are the core part of solar street lamps and the most valuable part of solar street lamps.Its function is to convert the solar radiation capacity into electrical energy, or sent to storage batteries.Solar cells are mainly made of monocrystalline silicon.Single-crystal silicon is used to make p-n junctions similar to those found in diodes.It works like a diode.But in diodes, it is the external electric field that drives the p-n junction holes and electrons, while in solar cells, it is the sun's photons and radiant heat that drive and influence the p-n junction holes and electrons.That is commonly known as the photogenic volt effect principle.At present, the efficiency of photovoltaic cell conversion is about 13%-15% for monocrystalline silicon and 11%-13% for polycrystalline silicon.The latest technologies include photovoltaic thin-film cells.Solar controller: the most important link in the solar lamp system is the controller, whose performance directly affects the life of the system, especially the life of the battery.The controller USES industrial-grade MCU as the main controller. Through measuring the ambient temperature, detecting and judging the voltage, current and other parameters of the battery and solar cell components, it controls the opening and closing of MOSFET devices to achieve various control and protection functions.Dongguan haiguang intelligent solar lamp controller can provide comprehensive protection for the battery, so that the battery can work reliably for a long time.Battery: because the solar photovoltaic power generation system input energy is very unstable, so generally need to configure the battery system to work.There are generally lead-acid battery, ni-cd battery, ni-h battery.The choice of battery capacity should generally follow the following principles: first of all, under the premise of meeting the requirements of night lighting, the energy of solar cell modules during the day should be stored as far as possible, and at the same time, it should be able to store the electric energy needed for continuous cloudy and rainy night lighting.Battery capacity is too small to meet the needs of night lighting, the battery is too large, on the one hand, the battery is always in a state of loss of power, affect the battery life, at the same time cause waste.The battery should match the solar cell and the electric load (street lamp).There is a simple way to determine the relationship between them.Solar cell power must be more than four times higher than the load power before the system can work properly.Solar cell voltage to exceed the working voltage of the battery 20-30%, in order to ensure that the battery normal negative.The battery capacity must be more than 6 times higher than the daily load consumption is appropriate.Light source: what kind of light source solar lamps use is an important indicator of whether solar lamps can be used normally. Generally, solar lamps use LED high-efficiency light source.LED light source, long life, up to 1000000 hours, low voltage, no inverter, high light efficiency, domestic 80Lm/w, imported 100Lm/w.With the development of technology, LED performance will be further improved.Dongguan haiguang lighting believes that LED as the source of solar street lamps will be a trend.At present, most lawn lights choose LED as the light source, which mainly USES the energy of solar cells to work.When the sun's light shines on the solar cell during the day, the light energy is converted into electrical energy and stored in the battery, which then supplies the LED(light emitting diode) of the lawn lamp at night.LED energy saving, safety, long life, low working voltage, very suitable for the application of solar lawn lamp.LED technology, in particular, has experienced its key breakthroughs, and its characteristics have been greatly improved in the past five years, its performance and price ratio has also greatly improved the lamp pole and lamp shell: the height of the lamp pole should be determined according to the width of the road, the spacing of lamps and lanterns, road illumination standards.According to the lamp shell we collected a lot of foreign solar lamp data, between beauty and energy saving, most choose energy saving, the lamp appearance requirements are not high, relatively practical on the line.

System structure: the microcomputer monitoring system for solar street lamps is composed of microcomputer main control circuit, solar panels, battery chargers and dischargers, battery packs, LED light source drivers and LED lights.(1) microcomputer main control circuit: microcomputer main control circuit is the control core of the whole system, which controls the normal operation of the whole solar street lamp system.Microcomputer main control line has the measuring function, through the detection and judgment of solar panel voltage, battery voltage and other parameters, control the opening or closing of the corresponding line, to achieve a variety of control and protection functions.(2) charging drive circuit: the charging drive circuit is composed of MOSFET drive module and MOSFET.MOSFET driver module adopts high speed optical coupling isolation, emitter output, short circuit protection and slow off function.MOSFET was selected as the special IC for switching power supply of isolated and energy-saving monolithic machine. The full voltage input range of driving LED was 150V ~ 200V, and the output current was 8A ~ 9A.Wide input voltage range, good voltage adjustment rate and load adjustment rate, strong anti-interference ability, low power consumption.This system completes the charging of the solar cell group to the battery through the charging drive circuit, and provides the corresponding protection measures in the circuit.(3)LED drive circuit: composed of IGBT drive module and MOSFET, it can adjust the brightness of street lamps and switch street lamps.(4) solar arrays: solar arrays by solar energy battery monomer (working voltage of 0.5 V, current work is about 20 ~ 25 ma/cm2, covers an area of 10 cm by 10 cm) with string, as a way to connect components, and a standard components including 36 monomer, can make a solar energy battery components about 17 V voltage, become a nominal voltage of 12 V battery ChiZu.When higher voltage and current components are required for the application system, multiple components can be formed into a solar cell array to obtain the required voltage and current.Solar cells play two roles in the whole system. One is to convert sunlight into electricity.The second is that solar cells, as the optical control elements of the system, can detect the brightness of the outdoor from the voltage of the solar cells at both ends, that is, from the size of the solar cell voltage to judge the darkness and dawn and LED lighting source brightness.(5) battery pack: since the energy obtained from photovoltaic array is not always consistent with the requirements of electronic load, the battery can still make the load work when the photovoltaic array itself cannot provide enough power.If electronic loads are required to work at night or on cloudy or overcast days, energy storage is required.The storage capacity of battery is designed to meet the requirement of average daily electronic load during independent operation.Generally speaking, should be able to reserve 5 ~ 7 days of night lighting power consumption.Battery is the key part of the whole solar street lamp system, it is the storage energy equipment of the whole solar system, during the day the solar cell to charge the battery, at night, the system and load by the battery to provide electricity, secondly, cloudy and rainy day power supply also depends on the battery to complete.In independent photovoltaic systems, the electricity generated by photovoltaic arrays is not always used at the same time as the electricity generated, so batteries are needed in most independent photovoltaic systems.(6) communication device: it is composed of wireless data transmission module.The wireless data transmission module supports GPRS, with rs-232 interface, communication distance up to 100 meters, strong anti-interference, not subject to radio and television, mobile communication interference, to achieve communication between adjacent street lamp terminals.

  Concerns over energy supply security and actions to combat climate change have contributed to the rapid development of renewable energy technologies and industries around the world, such as photovoltaic power generation and wind power generation, with annual growth rates of more than 20%.Renewable energy has become an important alternative energy source to realize energy diversification, cope with global climate change and achieve sustainable development.Especially in the past two years, with the sharp fluctuations in international oil prices and the implementation of the Kyoto protocol, the development of renewable energy has become a hot topic in the international energy field and attracted extensive attention from many countries in the world.With the economic development, China's lighting power consumption will be greatly increased, green energy-saving lighting research and application, will be more and more attention.As a cold light source products, solar LED lighting lamps and lanterns has high cost performance, green environmental protection, safe and reliable, stable quality, long service life, easy installation and maintenance etc., can be widely used in green lighting, road lighting, advertising light box, lighting, urban landscape lighting and home lighting system modelling, but higher solar LED lighting lamps and lanterns to invest is the bottleneck of its development.At present, lighting consumption accounts for about 20% of the total power consumption. Reducing lighting consumption is an important way to save energy.In order to achieve this goal, the industry has developed a variety of energy-saving lighting appliances, and achieved some results.However, the distance from the "green lighting" requirements is still far, the development and application of more efficient, reliable, safe, durable new light source is imperative.

   By the end of 2006, China's renewable energy use totaled 200 million tons of standard coal (excluding biomass energy used in traditional ways), accounting for about 0.5 percentage point, making a solid step toward the goal of 10% renewable energy in China's total primary energy consumption in 2010.At present, China is promoting the development of the domestic market of photovoltaic power generation from the following aspects: 1.2. Photovoltaic power generation for special projects, such as the world expo and the Olympic Games;Building photovoltaic power stations in desert areas;4. Mobilize some cities to launch roof plans;V. study and formulate pricing policies to improve the competitiveness of photovoltaic power generation.LED with low power consumption, extraordinary service life has been widely used in signal indication, digital display and other fields of weak electricity.However, due to the small opening Angle of traditional LED light source, high brightness of point area, strong directivity of light scattering, easy formation of light spot by light source, poor uniformity of light and other factors, its application in the field of lighting is constrained.Through the traditional solar lighting lamps and lanterns structure, intelligent controller, reflector Angle update and technical improvement, the optimal tilt Angle design, so that the advantages of flat head and round head complement each other, so as to make its luminescence more uniform, overall brightness higher, lower cost, more conducive to the application and promotion.The column-type and torch-type combined light source structure of flat-head LED can greatly improve the uniformity and illumination of LED combined light source by reasonably controlling the inclined Angle of flat-head ultra-bright white light LED installation.The technology can not only enhance the light efficiency, but also the combined light source only consumes about 4W energy, the brightness of the light emitted can reach 20W energy-saving lamp or 40W incandescent lamp brightness, can more effectively use solar energy.As long as the capacity of 12W solar cell is needed, the 12V/24Ah battery pack can ensure that this LED light source can continue to work effectively in 5 rainy days, and the service life is more than 100,000 hours, which is more than 10 times of the energy-saving lamp.Developed for street light field special combination of rectangular combination light source, light source, cross and give full play to the flat LED far greater good evenness and the round head LED point light area of the advantage of high brightness, make the two complement each other, the maximum photosynthetic efficiency, overcome the flat LED point area of brightness LED, round head is better than the round head LED light evenness than flat LED shortcomings.

   In terms of the controller, solar photoelectric conversion technology is used to maximize the collection of electric energy. After the storage of electric energy is completed, the battery provides a 12V dc power supply to the light source to generate 6500K white light.At the same time, by simplifying the structure of the intelligent controller, the structure is more simple and the failure rate is lower, so as to further reduce the cost of technical preparation.In addition, through the detection of solar cell output and battery power, so as to determine the working state of the system, the whole system of automatic control and intelligent management.As a new green energy, solar energy has been rapidly promoted and applied with its incomparable advantages.As the fourth generation of new light source, it has been effectively used in urban lighting beautification, road lighting, courtyard lighting, indoor lighting and other fields of lighting and application.Especially in remote areas without electricity, solar lighting lamps and lanterns have a broad application prospect.The successful development of ultra-bright LED has greatly reduced the cost of solar lamps and lanterns, making it reach or close to the cost quotation of the initial installation of power-frequency ac lighting system, and has the advantages of environmental protection, simple installation, safe operation, economic and energy-saving.As LED has the advantages of high light efficiency and low heat output, it has been increasingly applied in the field of lighting and shows the trend of replacing the traditional lighting source.