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1. Solar cell
The function of solar panel is to directly convert solar energy into direct current for load use or storage in battery for standby. According to the needs of users, several solar panels are generally connected in a certain way to form a solar cell array, which is equipped with appropriate supports and junction boxes.
Solar panel is one of the most important components in solar power generation system. Its conversion rate and service life are important factors to determine whether the solar power generation system has service value.
Solar panel features:
● battery:
Polycrystalline silicon is imported from Germany. The antireflection film of the battery is silicon nitride film deposited by enhanced plasma chemical vapor deposition, which is dark blue.
The average conversion rate of the battery is more than 17%.
● component frame:
The module frame is made of anodized high-quality aluminum alloy frame, and the thickness of alumina film on its surface is 25 microns. The frame of the component is equipped with four groups of screw holes and one group of grounding holes for easy installation, which fully meets the requirements of international authoritative certification bodies.
● tempered glass:
The surface glass of the module adopts the low iron (iron content less than 0.02%) tempered glass of Pilkington company in Australia, with a thickness of 3mm and a light transmittance of more than 92% in most optical bands.
● packaging materials:
The components are laminated by imported anti-aging EVA (ethylene vinyl acetate polymer) and good weather resistant TPT (composite fluorine plastic film) material.
● junction box:
The junction box of the module is designed and manufactured according to the requirements of grid connected power generation in the current international market. High quality PP material is used as the shell and internal insulation material of the junction box, silver plated copper electrode material is used as the terminal, and two roadside diodes are configured to reduce the hot spot effect. The junction box has good sealing and waterproof performance.
Technical parameters of solar panels:
Solar panels have a variety of specifications to meet the needs of different users. The following describes the technical parameters of 100W solar panel:
Stp-100 solar panel
■ the module is composed of Japanese sharp polysilicon solar cell chips in series and parallel
■ anodized aluminum alloy frame forms a practical square structure, which allows single use or array use
■ equipped with standard support system and mounting holes
■ guaranteed service life of 25-30 years
■ waterproof and dustproof junction box to ensure safe and reliable wiring
■ silver white aluminum alloy frame, high light transmittance tempered glass, white tetra substrate
Typical parameters
Standard test conditions (AM1.5): irradiance = 1000W / ㎡, battery temperature = 25 ℃
Normal operating temperature of battery
50℃
Peak power (WP)
100W
Short circuit current temperature coefficient
+0.4mA/℃
Open circuit voltage (VOC)
21.6V
Open circuit voltage temperature coefficient
-60mV/℃
Maximum power voltage
(Vmp)
17.2V
Filling factor
70％
Short circuit current (ISC)
5.8A
Frame grounding resistance
≤1ohm
Maximum power current
(Imp)
5.0A
Upwind pressure
2400Pa
weight
8kg
Insulation voltage
≥600V
Overall dimension (mm)
six hundred and seventy × nine hundred and ninety × forty
Mounting aperture
d9
Mounting hole size (mm)
six hundred and thirty-five × six hundred and eighty
2. Microcomputer intelligent controller for solar lighting lamps
In different types of photovoltaic systems, the charge discharge controller is different, and its function and complexity vary greatly, which needs to be determined according to the requirements and importance of the system.
Microcomputer intelligent controller provides battery charging and discharging management functions for the power generation system of solar lighting lamps. The power generated by the solar cell is charged by the intelligent controller. When the battery is not full, the function of the controller is to charge the battery to the greatest extent; When the battery is fully charged, the power generated by the solar cell is controlled to make the battery in floating charge state. When the battery of the solar lighting lamp is discharged to the voltage close to the over discharge point of the battery after the continuous rainy days exceed the rated time, the controller will give an alarm of insufficient battery power and cut off the discharge circuit of the battery to protect the battery.
Hefei lumen New Energy Technology Co., Ltd. has been committed to the R & D and production of solar power generation system. After many improvements and continuous process improvements, the LM series microcomputer intelligent controller adopts 16 bit microprocessor controller, the power device adopts the high-power FET of German IXYS company, and the DC output circuit adopts the special device of British Curtis company, With high quality and high cost performance.
characteristic:
● programmable over charge, over discharge and over current protection values;
● Hall voltage and current sensors;
● the control circuit is completely isolated from the main circuit;
● 1-4 solar cell inputs;
● surge, short circuit, reverse connection, overload and other protection functions;
● battery open circuit protection, load overvoltage protection and night anti reverse charging protection;
● output short circuit protection, solar cell reverse connection protection and battery reverse connection protection;
● undervoltage and overvoltage anti shock protection: balanced charging;
● temperature compensation function (with automatic identification of whether the temperature sensor is online);
● optical control switch, time control switch, dual time control switch or optical / time hybrid control switch;
Typical parameters
3. LED light source of solar lighting lamps
 
LED (light emitting diode) is a semiconductor that can convert electric energy into visible light. It changes the principle of tungsten filament luminescence of incandescent lamp and three primary colors luminescence of energy-saving lamp, and adopts electric field luminescence. According to the analysis, the characteristics of LED are very obvious, with long service life, high light efficiency, no radiation and low power consumption. Almost all the spectra of LED are concentrated in the visible frequency band, and its luminous efficiency can reach 80-90%.
Compared with ordinary incandescent lamp, spiral energy-saving lamp and T4 and T5 three primary color fluorescent lamp, the results show that the light efficiency of ordinary incandescent lamp is 12lm / W and the service life is less than 2000 hours, the light efficiency of spiral energy-saving lamp is 40lm / W and the service life is less than 4000 hours, while that of T4 and T5 fluorescent lamp is 80lm / W and the service life is about 80000 hours; The light efficiency of ordinary bright white LED with a diameter of 5mm is 28-30lm / W, and that of imported super bright LED with a diameter of 5mm is 80-90lm / W. Jiangsu Senfa street lamp manufacturing Co., Ltd. applies high-efficiency heat dissipation technology to the imported ultra bright white LED and encapsulates it into an integrated high-power light source. Its brightness can reach 80-100lm / W and its service life can be more than 100000 hours. It has been used on the light source of solar lamps for many years, and the effect is very ideal. Several dozen high-power LEDs are integrated into one lamp cap and used on 8-14m high solar street lamps with luminous brightness of more than 400W ordinary high-pressure sodium lamps.
It is generally believed that energy-saving lamps can save 30% energy, which is a great innovation, but LEDs can save 70% more energy than energy-saving lamps, which is a greater reform of solid-state light sources. In addition, led also has other advantages, high light quality, basically no radiation, which is a typical green lighting source; Reliable and durable; The maintenance cost is extremely low and so on. Because LED has the above characteristics that other solid-state light sources cannot match, LED will be the mainstream light source in the lighting industry in five years.
LED is widely used in signal indication, digital display and other weak current fields with low power consumption and extraordinary service life. Nowadays, the successful development of ultra bright LED makes it more and more used in the lighting industry. The advantages of high light efficiency, high light efficiency and low calorific value of LED have gradually replaced the trend of traditional lighting sources, which has been widely concerned by people in the industry.
What kind of light source is used is an important indicator of whether solar lighting lamps can be used normally. General solar lighting lamps adopt low-voltage energy-saving lamps and electrodeless lamps. Low voltage energy-saving lamp: the service life is 2000 hours, the voltage is low, the lamp tube is black, and it will be damaged within 1 year at most. High frequency electrodeless lamp: the lamp can be used under the condition of 220V (pure sine wave, frequency 50Hz) ordinary commercial power, and its service life can reach 50000 hours. When used on solar lighting lamps, its service life is greatly reduced, which is almost the same as that of ordinary energy-saving lamps (because square wave inverters are used on solar lighting lamps, and the output frequency and bit voltage can not be compared with ordinary commercial power).
LED lamp: 100W solar lighting lamps with LED light source, and the actual use efficiency is equivalent to that of ordinary 130W energy-saving lamp light source. The price of high-power LED light source solar lighting lamps produced by our company is far lower than that of ordinary solar lighting lamps; Under the same power condition, the service efficiency, service life and reliability of solar lighting lamps are greatly improved.
4. Battery pack
The battery pack stores the direct current generated by the solar cell for use by the load. In the photovoltaic power generation system, the battery is in the floating charge and discharge state, and there is a large amount of sunshine in summer to prevent the battery from overcharging; There is less sunshine in winter to prevent over discharge of the battery. During the day, the solar cell charges the battery, and at night, the load power is supplied by the battery. Therefore, it is required that the self discharge of the battery should be small and the charging efficiency should be high. At the same time, factors such as performance, price and convenience of use should be considered. The commonly used batteries include lead-acid batteries and silica gel batteries, and the more expensive nickel cadmium batteries can also be selected according to the requirements.
Product features:
■ maintenance free, no need to replenish fluid
■ wide adaptability to ambient temperature: - 50 to + 70 ℃
■ long service life
■ safe explosion-proof
■ there is no free electrolyte, and it can be used when the side is inverted 90 degrees
■ small internal resistance and good current discharge characteristics
■ small self discharge
■ factory charged, easy to use
■ unique formula, good deep discharge recovery performance