Solar batteries are an important part of solar street lamps and accessories. At this stage, there are ternary lithium batteries, lithium iron phosphate batteries, gel batteries, and lead-acid batteries.
Several kinds of batteries are commonly used in solar street lights, which battery is the best?
1. Lithium iron phosphate batteries commonly used in solar street lights:
What is a lithium iron phosphate battery?
Lithium iron phosphate battery is a kind of battery using lithium iron phosphate (LiFePO4) as the positive electrode material of the battery (partners who are not familiar with the positive electrode material of lithium battery can click on the link below: Analysis of Lithium Battery Cathode Materials), carbon is used as the negative electrode material (the following article about the negative electrode material of lithium battery has a detailed introduction, and interested partners can refer to it by themselves: Lithium-ion battery anode material), the rated voltage of the single cell is 3.2V, and the charge cut-off voltage is 3.6V~3.65V. During the charging process, some of the lithium ions in the lithium iron phosphate are extracted, transferred to the negative electrode through the electrolyte, and embedded in the negative electrode carbon material; at the same time, electrons are released from the positive electrode and reach the negative electrode from the external circuit to maintain the balance of the chemical reaction. During the discharge process, lithium ions are extracted from the negative electrode and reach the positive electrode through the electrolyte. At the same time, the negative electrode releases electrons and reaches the positive electrode from the external circuit to provide energy for the outside world.
The following article has a detailed introduction to lithium iron phosphate batteries. Interested partners can click to view:
In-depth interpretation of lithium iron phosphate batteries
Lithium iron phosphate battery is a battery that integrates many advantages. It has a high specific energy, small size, fast charging, sturdy and durable, and good stability, but the price is also the highest among all batteries. Its deep cycle charging times are generally 1500-2000 times. A group of lithium iron phosphate batteries can generally be used for 8-10 years under regular use and in an environment of -40℃-70℃. The temperature range is quite wide.
2. Ternary lithium batteries commonly used in solar street lights:
What is a ternary lithium battery?
Ternary polymer lithium battery refers to a lithium battery whose positive electrode material uses nickel-cobalt lithium manganate (Li(NiCoMn)O?) or nickel-cobalt aluminate ternary positive electrode material, and the positive electrode material of a ternary composite battery is nickel Salt, cobalt salt and manganese salt are the main raw materials, and the ratio of nickel, cobalt, and manganese can be adjusted according to actual needs. The lithium battery with ternary material as the positive electrode is safer than the lithium cobalt oxide battery.
The ternary lithium battery has many advantages, such as high specific energy, small size, fast charging, and high price. Its deep cycle times are 500-800 times, its life is similar to that of gel batteries, and its temperature range is -15℃-45℃. However, the ternary lithium battery also has disadvantages. Its internal battery is not stable. If it is a ternary lithium battery produced by an unqualified manufacturer, it may explode during the overcharge process or in a high-temperature environment.
3. Gel batteries commonly used in solar street lights:
What is a gel battery?
The colloidal battery is a development classification of lead-acid batteries. The method is to add a gelling agent to sulfuric acid to convert the electro-hydraulic sulfuric acid into a colloidal state. A battery in which the electro-hydraulic is in a gel state is generally called a gel battery.
A gel battery is a kind of solid-state battery to a certain extent. If you are interested in solid-state lithium battery, you can check the following:
The next gold mine is hidden in solid-state lithium batteries
The difference between gel batteries and conventional lead-acid batteries, from the initial understanding of electrolyte gelation to the further development of the electrochemical properties of the electrolyte infrastructure, is equivalent to an upgraded version of lead-acid batteries. It is maintenance-free and overcomes the frequent maintenance of lead-acid batteries. Criticized, the internal structure replaces the sulfuric acid electrolyte with colloidal electrolyte, and the storage capacity, discharge capacity, safety performance, and lifespan are also significantly improved, but the price even surpasses the ternary lithium battery sometimes.
When it comes to the safety of batteries, the charging of lithium batteries is a very important part. I believe that many partners will have questions when charging mobile phones and other electrical appliances. What is the correct charging method? Maybe the following article can give you the answer:
Common application scenarios of lithium batteries
The gel battery can be used in the temperature range of -40°C to 65°C, and the low-temperature performance is better, so it can be used in the northern alpine region. It has good seismic resistance and can be used safely in various harsh conditions. The service life is twice or even more than that of ordinary lead-acid batteries.
4. Lead-acid batteries commonly used in solar street lights:
The plates of lead-acid batteries are composed of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid. The important advantages of lead-acid batteries are that the voltage is relatively stable and the price is relatively cheap; the disadvantage is that the specific energy is relatively low, so the volume is much larger than that of ordinary batteries, and the service life of lead-acid batteries is relatively short, generally 300-500 deep cycles, Maintenance is more frequent, but because of the price advantage, it is still widely used in the solar street light industry.
Well, the above is the whole content of the four kinds of batteries commonly used in solar street lamps that Microcharge brings to you today. Ternary lithium-ion batteries, lithium iron phosphate batteries, gel batteries, and lead-acid batteries each have their own advantages and disadvantages. , you need to choose according to the actual situation when choosing, I hope the above content will be helpful to you, we will see you in the next issue.