3.7v 3000mah 18650 battery.18650 battery cell

This type of lithium battery cell refers to a rechargeable battery with a diameter of 18mm and a total length of 65mm. 0 indicates a cylindrical rechargeable battery. This technology is technically complete, the battery has a stable structure, high specific volume, and outstanding overall performance. At the same time, due to its small size, it can be used in many industries, which is of important practical significance. The disadvantage is that its safety factor is not as good as that of polymer lithium batteries. The cycle frequency of lithium batteries is relatively low, only about 300 times.

18650 batteries are usually cylindrical and are usually packaged in aluminum shells. The key point is that because the lithium-ion battery of 18650 behaves as a liquid, just like a cup filled with water, 18650 can only be cylindrical.

However, the risk of 18650 is still very high. The main reason is that the packaging design of 18650 products generally uses steel casings. If the manufacturer encounters uncontrollable problems during the processing and the product quality is not up to standard, explosion problems may easily occur.


Polymer batteries

Unlike traditional lithium batteries, the production process of polymer batteries is different. Lithium batteries are coiled together and have a relatively soft capacity. The polymer has a laminated structure and is relatively hard in volume. For polymer and lithium batteries with the same volume, the polymer volume is very large, reaching 30%. The safety factor is good and the risk of explosion is low. Increase the useful life. The battery can be charged and discharged more than 500 times. The disadvantage lies in the increased cost. The polymer battery cell of the same volume is at least 100% more expensive than the 18650 lithium-ion battery lithium battery cell. The biggest safety hazard of lithium-ion batteries is that liquid leakage and short-circuit failure may cause difficulties in unpacking. The most terrifying situation may cause ignition and a slow fire.

Which is better, 18650 battery cell or lithium polymer battery cell?

Initially, the two raw materials of 18650 lithium battery and lithium polymer battery are different. The raw materials of 18650 lithium battery include lithium iron phosphate battery, lithium manganate battery and ternary lithium, etc., while the raw materials of lithium polymer battery are The raw materials are generally a mixture of various materials such as lithium cobalt oxide batteries, lithium manganate batteries, and ternary lithium. The former raw material has high single purity, while the latter raw material has extremely high composition.

The safety factors of these two materials are very different. The main reason for the 18650 lithium battery lies in the packaging design of the aluminum case, which makes it easy to explode when the quality of the product is not up to standard. However, people who are starting to assemble may not be able to identify whether the 18650 lithium batteries they buy are of high quality. For novices, it is more difficult to get started with 18650 lithium batteries. What is recommended? Generally speaking, for the assembly of lithium batteries, novices are interested in assembling lithium battery packs. The lithium battery cells chosen by novices are best lithium polymer batteries. The most important thing is its high efficiency and high safety factor. A high safety factor is the most important. In the final analysis, only by protecting your own personal safety can you do what you want to do.