Solar Bollard Light Manufacturers

A brief history of the origin of solar lights：

The concept of solar energy utilization can be traced back to ancient civilizations. Ancient humans realized that sunlight has the functions of lighting and heating, and tried to use solar energy as an energy source for lighting and heating. However, ancient humans lacked modern science, technology and materials and were unable to achieve effective utilization of solar energy. With the development of modern science and technology, people began to systematically study the utilization of solar energy. At the end of the 19th century and the beginning of the 20th century, scientists proposed ways to utilize solar thermal energy and light energy, and began to try to use solar energy for heating, lighting, and power generation.
First-generation solar lights: The first-generation solar lights usually use solar panels and energy storage batteries to convert solar energy absorbed during the day into electrical energy, store it in the battery, and then use this electrical energy to supply LED lights for lighting at night. This kind of solar light is mainly used in outdoor street lights, courtyard lighting and other scenarios. With the continuous advancement of solar technology and the reduction of costs, the efficiency and performance of solar lights have been significantly improved. The new generation of solar lights uses more efficient solar panels, advanced energy storage batteries, intelligent control systems and other technologies to achieve more stable, more energy-saving and smarter lighting effects. Today, solar lights have been widely used in outdoor lighting, garden landscaping, road lighting, emergency lighting and other fields. They not only provide people with clean, environmentally friendly lighting solutions, but also reduce energy consumption and carbon emissions, contributing to sustainable development.

How do solar lights convert sunlight into electricity through the photovoltaic effect?

Solar lights convert sunlight into electrical energy through the photovoltaic effect. Solar lights are usually equipped with photovoltaic panels whose surfaces are covered with photosensitive materials such as silicon. When sunlight strikes a photovoltaic panel, photon (quantum of light) energy is absorbed by the light-sensitive material. After the energy of the photon is absorbed, the atoms in the photosensitive material are excited, causing some electrons to jump into the conduction band and release electrons from the valence band. This creates electron-hole pairs in the semiconductor material. Due to the structural design of photovoltaic panels, electrons and holes are separated by the electric field. The electrons move toward the negative terminal of the panel, while the holes move toward the positive terminal of the panel. By connecting the photovoltaic panel to an external circuit, the separated electrons and holes form a current that flows to the external load. This current can drive LED lights, rechargeable batteries, or other devices. Solar lights are usually equipped with rechargeable batteries to store the electricity generated during the day. These batteries will provide power for LED lights to use at night or when there is insufficient light, ensuring continuous lighting.

Protection function of overcharge and over-discharge in solar lamps：

The control circuit of solar lights usually includes overcharge and over-discharge protection functions to ensure the safe charging and use of solar cells. These functions can be achieved through electronic components and algorithms in the control circuit.
Overcharge protection: The overcharge protection function ensures that the rechargeable battery will not be damaged by excessive voltage during charging. When the voltage generated by the solar panel exceeds the rated voltage of the rechargeable battery, the overcharge protection circuit will stop charging or limit the charging current to prevent the battery from overcharging.
Over-discharge protection: The over-discharge protection function ensures that the rechargeable battery will not be damaged due to over-discharge during discharge. When the battery is discharged to a certain level, the over-discharge protection circuit will cut off the connection between the battery and the load to prevent the battery from continuing to discharge.

These protection functions are usually implemented by specialized circuit components and control chips, such as overvoltage protection chips, overcurrent protection chips, temperature sensors, etc. These components can monitor parameters such as battery voltage, current, and temperature, and perform control and protection operations based on preset thresholds.
Through the overcharge and over-discharge protection functions, the solar light control circuit can effectively protect the rechargeable battery, extend its service life, and improve the safety and stability of the solar light.