Why choose lithium iron phosphate batteries for solar street lights?
Solar street lights are powered by crystalline silicon solar cells, maintenance-free lithium iron phosphate batteries (lithium batteries) to store electrical energy, bright LED lamps as light sources, and are controlled by intelligent charge and discharge controllers to replace traditional public power lighting street lights. No need to lay cables, no AC power supply, no electricity bill; DC power supply and control; it has the advantages of good stability, long life, high luminous efficiency, easy installation and maintenance, high safety performance, energy saving and environmental protection, economical and practical. It can be widely used in urban main and secondary roads, communities, factories, tourist attractions, parking lots and other places. Product components Light pole structure: steel light poles and brackets, the surface is sprayed with plastic, and the battery board is connected with special anti-theft stainless steel screws.
Description of the working principle of the solar street light: During the daytime, the solar street light is under the control of the intelligent controller. The solar panel absorbs the solar light and converts it into electrical energy after being irradiated by sunlight. The solar panel components charge the lithium battery pack during the day, and the lithium battery pack provides electricity at night Supply power to the LED light source to realize the lighting function. The DC controller can prevent the lithium battery pack from being damaged due to overcharge or overdischarge, and has functions such as light control, time control, temperature compensation, lightning protection, and reverse polarity protection.
The common solar street lights in life are composed of five major parts: lamp poles, lamp holders, solar panels, controllers, and lithium batteries. In the meantime, there is a lamp arm on the lamp pole to connect the lamp head, and the lamp pole is combined with the ground cage buried deep in the ground during installation. The lamp head is the lighting part of the solar street lamp, which contains lamp beads, controllers, connecting wires, and some have lithium batteries installed inside. Solar panels are mainly composed of photosensitive devices. Lithium batteries are mainly composed of multiple cells.
When purchasing solar street lights, manufacturers often ask customers to provide some information to determine the rationality of the configuration of each component of solar street lights, such as the number of rainy days in the installation area, which is generally used to determine the capacity of the battery. In terms of choice, lead-acid batteries in the past have also been gradually replaced by lithium iron phosphate batteries. It is said that lithium iron phosphate batteries are better. So what are the advantages of this kind of battery, and where are the advantages?
1. Improved safety performance
The battery often fails due to overcharge and overdischarge. It is a trivial matter to affect its performance. Along with these failures, there is often a potential danger of explosion. For example, the structure of the lithium cobalt oxide battery is not stable enough. It is easy to collapse and generate heat, or form strong oxidizing substances, affecting its safety.
In the crystal structure of lithium iron phosphate batteries, the PO bond is very stable and difficult to decompose. Of course, it cannot be said that there is no danger at all. If it is used improperly, it may still be dangerous, but compared with other batteries, its safety has been greatly improved. The improved, with some safety protection devices, it will be more secure to use.
Second, life extension
During the discharge process of the lithium iron phosphate battery, the discharge voltage is stable and basically unchanged. Only when the discharge voltage is approached, will it change a little, showing good discharge characteristics, the cycle life can reach more than 2000 times, and it can be used 78 years, and the cycle life of lead-acid batteries is often 300500 times, and it will lose its characteristics after a long time, and it will take about 1 and a half years.
3. Stable capacity
If the battery is in a full and incomplete release environment for a long time, it will have a great impact on the capacity, because there is a memory effect. For batteries such as nickel-metal hydride and nickel-chromium, this situation is irreversible. The battery capacity is small, it is really small.
The lithium iron phosphate battery is over-discharged to zero voltage storage, and there will be no leakage or damage, and the capacity will not change much. Some other lithium-ion batteries do not have the characteristics.
4. Light weight
This involves a specific energy problem. Compared with lead-acid batteries, under the same conditions, the volume of lithium iron phosphate batteries is only about 60 percent 70, and the weight of lead-acid batteries is only 30 percent 40 percent . , it can save space better, and it also proves to a certain extent from another level that under the same conditions, the capacity of lithium iron phosphate battery is larger.
5. Environmental protection
This mainly involves the disposal of batteries after they are discarded. Lead-acid batteries contain a large amount of heavy metals such as lead. If they are not handled properly, they will easily pollute the environment. However, lithium iron phosphate batteries do not contain any harmful substances and have good performance. It is relatively stable, and it will not cause any pollution to the environment whether it is in use or in the process of disposal.
The above is the relevant knowledge about why solar street lights should choose lithium iron phosphate batteries. If you have other related questions, you can consult our Zhengzhou Haopai New Energy Technology Co., Ltd.
