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There is no doubt that it is better than lead-acid batteries in all aspects. The most common one is lithium iron phosphate batteries. This battery does not have a memory effect like lead-acid batteries. After more than 1,600 recharges, the storage capacity of the battery is still It can reach 85%. Compared with lead-acid batteries, lithium batteries have the advantages of lightness, large capacity and long service life.
The electrode is mainly made of lead and oxide, and the electrolyte is sulfuric acid solution. In the charged 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 discharged state, the main component of the positive and negative electrodes are lead sulfate. Because of the memory effect of lead-acid batteries, the storage capacity of the battery will be greatly reduced when overlapped more than 500 times.
a) Lithium battery is small and light, saving time and effort to install.
Now the first choice for solar street lights in the world is generally integrated street lights. If lead-acid battery packs are used, they need to be buried underground around the light poles and placed in the buried box. If lithium batteries are used, with their lighter weight, It can be connected to the back of the battery board, saving time and effort.
b) Lithium batteries are less polluting than lead-acid batteries and are environmentally friendly.
We all know that lead-acid batteries have a relatively short service life. Although they are cheap, they may need to be replaced once a year, which will greatly increase environmental pollution. In addition, lead-acid batteries are more polluting than lithium batteries. If they are replaced all the time, they will always cause harm to the environment. Lithium batteries are not polluted, while lead-acid batteries are polluted by heavy metal lead.
c) Lithium battery is smarter.
Today’s lithium batteries have become more and more intelligent, and their functions have become more and more complete. The current lithium battery can be adjusted according to the user’s demand for the battery and the length of use. Many lithium batteries can be installed with a BMS management system, which can view the battery status on the mobile phone in real time, and can also detect the current and voltage of the battery autonomously. If there is an abnormal situation, the BMS system can automatically adjust it.
d) Lithium battery has a longer life.
The annual loss of lead-acid batteries is relatively high, and often needs to be replaced once a year or two. The service life of lithium batteries is 3-5 years, and generally they can be guaranteed for three years. The cycle life of lead-acid batteries is about 300 times. The lithium iron phosphate battery has a 3C cycle life of more than 800 times.
e) Lithium battery is safer and has no memory effect.
Lead-acid batteries are easy to enter water, and lithium batteries are not easy to enter water. Moreover, lead-acid batteries have memory properties, that is charging will produce a memory effect when they are not fully discharged, which will affect the service life of the battery. The lithium battery has no memory and can be charged at any time. This is safer and more assured to use. Lithium iron phosphate has passed strict safety tests and will not explode even in severe collisions.
f) Lithium battery has high energy density.
Lithium batteries have a high storage energy density, which has now reached 460-600Wh/kg, which is about 6-7 times that of lead-acid batteries. This will better store energy for solar street lights.
g) Lithium battery solar street light is very high temperature resistant.
Solar street lights are exposed to the sun every day, so there are higher requirements for the temperature environment. The thermal peak value of lithium iron phosphate battery can be 350~500℃, and it can be used in the environment of -20℃–60℃.
In general, lithium battery is a controllable, non-polluting energy storage battery, which is more stable and safer than lead-acid batteries.
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