The wide application of solar street lights has greatly reduced the installation cost, and the advantages of high efficiency and energy saving have made it widely promoted and applied. The energy storage battery of solar street lights is also one of the very important components in the entire system. The general types are lithium iron phosphate. There are three types of batteries, lithium-ion batteries, and lead-acid batteries. Lithium-ion batteries and iron-lithium batteries are currently the most widely used. Lithium-ion batteries have high energy density, can be made smaller, and iron-lithium batteries have a longer life. This is the main reason why everyone favors lithium batteries. However, in practical applications, due to outdoor exposure and exposure to the sun, the possible high temperature and humid climate will greatly shorten the life of lithium batteries, and ultimately lead to serious consequences. Next, we will use lithium batteries from solar street lights. Do some analysis on advantages and possible risks;
Advantages of using lithium batteries in solar street lights;
1. Lithium-ion batteries are of the nature of dry batteries;
A controllable, non-polluting energy storage battery, which is more stable and safer than lead-acid batteries.
2. Intelligent optimization calculation and reasonable distribution of power consumption levels:
Solar street lamp lithium-ion battery can also intelligently optimize the calculation of remaining battery capacity, day and night time, weather conditions and other factors according to user needs, reasonably allocate power level, and realize functions such as light control, time control and storage memory to ensure continuous rainy days Lights up.
3. Long life of lithium ion battery:
Different from the short life of lead-acid batteries that need to be replaced in two or three years, the service life of lithium-ion batteries is generally greater than 10 years. In the solar street light system, the service life of the LED light source is generally up to 10 years (about 50,000 hours). The ion battery can be perfectly matched with the system, eliminating the tedious process of frequent battery replacement.
The disadvantages of solar street lamp batteries;
1. Environmental factors may cause problems with lithium batteries;
Exposure to direct sunlight during the day for a long time, the high temperature generated may cause serious failure of the lithium battery. This is mainly because the operating temperature range of conventional lithium batteries is -20°C to -60°C, and the internal temperature of the box after direct sunlight may be higher than 80°C. Extreme ambient temperature is a big killer of lithium batteries;
2. Lack or inadequate management of outdoor equipment
Because solar street lights need to be installed outdoors, even in the wilderness away from the crowd, there are certain difficulties in management, and the lack of management level will also lead to the failure to be detected in the early stage of the problem, leading to serious and enlarged;