The integrated solar street lamp battery usually chooses the lithium iron phosphate battery or ternary lithium battery. Which good, how to choose can be based on the following aspects to comprehensive comparison:
1. Different materials
Lithium iron phosphate battery is a kind of lithium-ion battery, which uses lithium iron phosphate as the cathode material. This type of battery is characterized by no precious metal elements (such as cobalt). In practical use, lithium iron phosphate battery has the advantages of high-temperature resistance and low cold, strong safety and stability, and better cycle performance.
Ternary lithium battery is also known as "ternary polymer lithium battery" is the use of nickel cobalt manganese lithium as anode material, graphite as anode material of lithium battery. Due to their smaller size and higher capacity density, ternary lithium batteries are now widely used in new energy vehicles. For example, we are familiar with Tesla, which uses ternary lithium batteries in all its models. Ternary lithium batteries also have great advantages in large charging rates and low-temperature resistance.
2. Voltage is different
The nominal voltage of lithium iron phosphate battery 3.2-3.3V, excellent resistance to overcharge and over-discharge, low voltage power generation is more suitable for rainy weather. Ternary lithium manganese system voltage 3.6-3.7V, slightly higher than lithium iron phosphate battery voltage.
3. Different service life
Ternary lithium batteries can be charged and discharged about 2,000 times and can be used for at least five years with one charge per day. Lithium iron phosphate power battery, the cycle life of more than 2000 times, standard charge (5 hours rate) use, can reach 2000 times, life can basically reach 7-8 years.
4. security
Ternary lithium battery safety performance is not stable, the decomposition temperature of the positive material is about 200℃, the risk factor is higher than lithium iron phosphate battery (the decomposition temperature of the positive material is about 700℃). Due to the unstable structure of nickel and cobalt at high temperatures, the high-temperature safety is poor and the risk factor is higher.
Through the comparison of the above points, no matter in terms of material cost, safety performance, voltage level, or service life, lithium iron phosphate battery is slightly better than three lithium batteries, more suitable for the use of solar street lamps.
