The social application value of solar street lights

Recognizing the increasing shortage of traditional energy sources, the application of green new energy solar energy will become more and more extensive. 1. At present, one of the most important links restricting the application of solar power generation is the price. Take a two-way solar street light as an example, the total load of the two channels is 60 watts. Discharge for 7 hours per night and increase the reserved amount of the battery board by 20%) The battery board needs about 160W. Calculated at 30 yuan per watt, the cost of the battery board will be 4800 yuan, plus the cost of the battery pack of about 180AH is also Nearly around 1800, the one-time investment cost of the entire street lamp is much higher than that of the city circuit lamp, causing the main bottleneck in the application field of solar street lamps. 2. The service life of the battery should also be considered in the application of the entire street light system. The general battery is guaranteed for three or five years, but the general battery will be unsatisfactory after one year or even half a year. Some actual charging rates are It may drop to about 50%, which will definitely affect the normal lighting at night during continuous rainy days, so it is particularly important to choose a better battery. 3. Because the life of LED lights is long and the power can be reduced in different periods at night, general engineering companies will choose LED lights as the lighting of solar street lights, but the quality of LED lights varies, and LEDs with serious light decay It is possible to attenuate 50% of the illuminance in half a year. Therefore, it is necessary to choose LED lamps with slow light decay. The most important thing for LED lamps is to do a good job of heat dissipation and constant current. Constant current can be driven by additional constant current or constant current by using a controller. Heat dissipation must rely on aluminum plates to dissipate heat. It is best to add copper sheets or copper tubes under the aluminum plate to dissipate heat more effectively and control the temperature so that the life of the LED will be longer. 4. The choice of controller is often a problem ignored by engineering companies. The quality of the controller varies. The market price of the 12V/10A controller ranges from 100-200 yuan, although it is the least valuable in the entire street light system. part, but it is a very important part. The quality of the controller directly affects the component life of the solar street light system and the procurement cost of the entire system. (1) The controller with lower power consumption should be selected. The controller works continuously for 24 hours. If its own power consumption is large, it will consume part of the power. It is best to choose a controller with a power consumption of less than 5 mA. (2) To choose a controller with high charging efficiency, the controller with MCT charging mode can automatically track the maximum current of the battery panel, especially in winter or periods of insufficient light, the MCT charging mode is about 20% more efficient than others. (3) A controller with adjustable power should be selected. The controller with power adjustment has been widely promoted. It can automatically reduce the working current of the LED lights during the night when there are few pedestrians, save electricity, and save the configuration of the battery board. Proportion. In addition to selecting the above power-saving functions, you should also pay attention to the protection function of the controller for components such as batteries. For example, the controller with trickle charging mode can protect the battery well and increase the life of the battery. In addition, set the controller undervoltage protection. When the value is lower than or equal to 11.1V, try to adjust the undervoltage protection value to ≥11.1V to prevent the battery from being over-discharged, which will reduce the service life of the battery. 5. Attention should be paid to anti-theft work in places far away from the urban area. Many engineering companies have not carried out effective anti-theft protection due to negligence in construction, resulting in the theft of batteries, battery panels and other components, which not only affects normal lighting, but also causes unnecessary property loss. At present, most of the stolen batteries and battery panels in engineering cases are buried in the ground and poured with cement, which is an effective anti-theft measure and can play a role in maintaining a constant temperature. If the battery box is installed on the light pole, it is best to weld and strengthen it. In addition, if the battery is far away from the controller, it must be equipped with a temperature sensing line, otherwise the controller cannot detect the temperature of the battery and cannot provide relevant temperature compensation. The theft of the battery panel is mainly due to the low pole or the clinging objects around the pole, so the height of the pole is preferably designed to be more than 5M. 6. The waterproof of the controller, most of the controllers are installed in the lampshade and battery box, and generally will not enter the water. However, in actual engineering cases, some of the controllers are not properly installed or the circuit boards of some controllers have not been treated with three-proof paint. It will cause a short circuit because rainwater flows into the controller along the external wiring of the controller terminals. Therefore, during construction, attention should be paid to bending the internal connecting wires of the controller terminals into a U-shape and fixing them, and the connecting wires exposed to the outside are also fixed to a U-shape, so that the rainwater cannot penetrate into the controller and cause a short circuit of the controller. Apply waterproof glue to the cable interface to waterproof. 7. In the practical application of many solar street lights, the solar street lights in many places cannot meet the normal lighting needs, especially in the continuous rainy days and the lack of light in winter. In addition to the use of related components of poor quality, another main The reason is to blindly reduce the cost of components, not design and configure according to requirements, and reduce the use standards of battery panels and batteries, so the street lamps cannot provide lighting on rainy days.