What is the Best Battery for LED Solar Street Light？

With the further development of renewable resources, the application of led solar street lights is becoming more and more extensive. Battery is one of the key components of the led solar street light. It's performance directly affects the lifespan of the streetlight. The cost-effective battery help keep the light running. Users all want to find the best rechargeable battery for the light. Here are some battery types applied in led solar street light and we will introduce the details. You can find the best battery that suits you. The commonly used batteries are lead-acid batteries, gel batteries, ternary lithium batteries, lithium iron phosphate batteries. First of all, let's take a look at the characteristics of these types of batteries:

1. Gel batteries belong to a development category of lead-acid batteries. The method is to add a gelling agent to sulfuric acid to make the sulfuric acid electro-liquid into a colloidal state. Batteries in which the electro-hydraulic is in a gel state are usually called gel batteries. Gel batteries are of high quality and have a longer service life than lead-acid batteries. It can be used in the temperature range of -40℃-60℃, especially the low temperature performance is good, suitable for cold areas. The charging efficiency is high, and the low temperature start performance is good. The disadvantage is that the production technology is difficult and the cost is high.

2. Lead-acid battery is a battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is sulfuric acid solution. In the discharge state of a lead-acid battery, the main component of the positive electrode is lead dioxide and the main component of the negative electrode is lead; in the charged state, the main component of the positive and negative electrodes are lead sulfate. Its advantages are low manufacturing cost, good high and low temperature performance, stable voltage, and electric energy efficiency up to 60%. The disadvantage is that the service life is short and the charging time is long. Lead is a heavy metal and there is pollution.

3. Ternary lithium battery refers to a lithium battery that uses lithium nickel cobalt manganate or lithium nickel cobalt aluminate as the positive electrode material. Smaller size, higher capacity density, low temperature resistance, better cycle performance. The number of deep cycles of ternary lithium battery is about 300-500 times, the life span is about 1 times longer than that of lead-acid battery, and the discharge temperature range is -15℃-45℃. The disadvantage is that because of the high density, the fire point is low when subjected to impact and high temperature, and it is easy to catch fire and explode if used improperly.

4. Lithium iron phosphate battery is a kind of lithium ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The rated voltage of the single unit is 3.2V, and the charge cut-off voltage is 3.6V~3.65V. Small size, long service life and good stability. Moreover, the charging and discharging efficiency is high, the weight is light, the environmental protection is pollution-free, and of course the price is high. The number of deep cycle charging is about 1500-2000, and the service life is long, generally up to 7-9 years. The temperature range is wide, and it can be used at -40℃-70℃.

For the battery capacity, if it is too small, it can't meet the needs of night lighting. If the battery capacity is too large, the battery will be in a power-off state, affecting the service life of the battery, causing a certain amount of waste and increasing unnecessary costs. Therefore, when configuring solar street lamps, you need to choose a battery with an appropriate capacity. Among all these batteries, lithium iron phosphate batteries are the most cost-effective. High performance, safety and stability, and most importantly, long service life. As long as the battery is well maintained and used, the life of the led solar street lights will naturally be extended. But the price of lithium iron phosphate battery is higher, and the solar street light price will be higher. At present, the cost-effective led solar street lights on the market are gradually adopting lithium iron phosphate batteries.