Solar Powered Traffic Light

Solar traffic lights are signal processing devices powered by solar panels located at intersections, crosswalks and other important locations to control traffic flow and can be used to direct road traffic by using different lights.

Most solar traffic lights use LED lights because they are safe and reliable, and have advantages over other lighting devices because they have higher energy efficiency, longer life, and can be turned on and off quickly.

In the field of solar energy development and application, solar traffic lights play an important role. The solar traffic light system adopts the "photovoltaic energy storage" mode, which is a typical independent solar energy development system. If there is sufficient sunshine during the day, photovoltaic power generation, battery charging, battery discharge at night, and signal lights supply power. The salient features of solar traffic lights are safety, environmental protection, energy saving, no need to install complicated and expensive pipelines, and automatic operation without manual operation. A typical solar signal light system includes photovoltaic cells, batteries, signal lights and controllers. In the system configuration, the life of the photocell is generally more than 20 years. Good quality LED signal lights can work for 10 hours a day, and theoretically can work for more than 10 years. The cycle life of lead-acid batteries is about 2000 times in the shallow charging shallow mode, and the service life is 5 to 7 years.

To some extent, the service life of the solar warning light system is determined by the quality of the lead-acid battery. Lead-acid batteries are vulnerable to damage and consumption, and the charging and discharging process must be reasonably controlled. Unreasonable charging methods, overcharging, and overdischarging will affect the life of lead-acid batteries. Therefore, in order to strengthen battery protection, it is necessary to prevent over-discharging and prevent over-charging.

A solar traffic light controller is a device that controls the charging and discharging process of the battery according to the battery characteristics of the system. Control the charging of the solar battery during the day, sample the voltage of the battery, adjust the charging method, and prevent the battery from being overcharged. Control the load of the battery at night, prevent the battery from being overloaded, protect the battery, and prolong the life of the battery as much as possible. It can be seen that the solar traffic light controller acts as a hub in the system. The battery charging process is a complex nonlinear process. In order to achieve a good charging process, it is necessary to better extend the battery life, and the battery charging control adopts intelligent control.