As the world's energy crisis intensifies, countries are looking for solutions to the energy crisis. And the wise human beings, discovered and used solar energy. Solar energy as a huge amount of renewable energy, can be said to be inexhaustible, and therefore more and more attention. And at this time, the development of solar street lighting field has become more and more perfect. So what should be noted in the design of solar street light system? The following is the Yinggu lighting small share.
1, solar cell module
The voltage of the solar cell module will decrease as the temperature rises. Due to the high temperature, the voltage loss of the battery module is about 2V, while the diode voltage drop on the charging process controller is 0.7V, so choose the module with an operating voltage of 18V. Due to the special nature of solar street lights, solar panels are generally installed on the poles, for street light poles, generally more than 5 meters, the center of gravity is higher, and most of the solar panels are suspended, in order to enhance the wind resistance of the whole set of equipment, generally choose multiple solar panels to form the required component power.
2、Battery (group)
In the choice of battery, must consider the discharge rate on the battery capacity, the temperature on the battery capacity, the depth of discharge on the battery capacity and several other aspects. So be sure to use a deep-cycle solar battery. When the battery is connected in parallel, it is necessary to consider the impact of imbalance between the individual cells, usually the number of parallel groups should not exceed 4 groups.
3, the choice of light source
The selection of light source for solar street lights is the most critical step, at present for solar street lights dedicated light source less, in order to reduce the loss of limited energy, light source try to choose DC light source. LED as a semiconductor light source, its development momentum is strong, is the most ideal light source for solar street lights, LED street light source is a multi-functional, environmentally friendly energy-saving street light source, suitable for use in a variety of lighting occasions. LED street light driver is a product developed specifically for the LED street light system, used to Provide stable power supply for LED lamps and lanterns. Using advanced electronic power technology, it is designed with two output modes: high-efficiency enhancement and super energy-saving pulse width modulation (PWM), with time control, it can light up LED lamps in high-efficiency enhancement mode when needed (the first half of the night when it is dark and there are many people and cars) to provide good lighting, and in other times (the second half of the night when there are few people and cars) in super energy-saving mode to save the battery's power consumption. In addition, most of the domestic solar street light project lighting brightness to meet the city road lighting standards.
4、Controller
The controller is the key component of the whole street light system acting as a manager, its biggest function is the overall management of the battery, a good controller should be based on the characteristics of the battery, set each key parameter points, such as the battery overcharge point, over discharge point, restore the connection point and SOC discharge control, etc.. When choosing the street light controller, special attention should be paid to the controller recovery connection point parameters, because the battery has voltage self-recovery characteristics, when the battery is in the over-discharge state, the controller cut off the load, and then the battery voltage recovery, if the controller parameters are not set properly, the light may flicker and shorten the life of the battery and light source.
The above considerations on the design of solar street light system is shared here, solar street light without laying cables, no AC power supply, no electricity costs, with good stability, long life, high luminous efficiency, easy installation and maintenance, high safety performance, energy saving, environmental protection, economic and practical advantages, can be widely used in urban main and secondary roads, neighborhoods, factories, tourist attractions, parking lots and other places.
