Which battery is better for lithium battery packs? Although there are commercially available lithium battery packs available for purchase, there are still quite a few people who like to assemble them themselves.
For those who like to assemble their own lithium battery packs, this article has nothing to look at. The next step is to understand the assembly for those who want to assemble their own lithium batteries but have not got started or just getting started. Battery.
The battery pack of the assembled lithium battery pack mainly has 18650 batteries and lithium polymer batteries, which are also common lithium battery pack batteries.
The 18650 market is generally lithium iron phosphate and lithium manganate and there are three yuan.
18650 batteries are generally cylindrical, and are generally packaged in steel. Because the lithium ion of 18650 is in a liquid state, just like a cup filled with water, the 18650 can only be cylindrical.
The risk of the 18650 is still high, because the 18650 package generally uses a steel shell. If the manufacturer has problems in production, the quality is not enough, it is easy to explode.
Lithium polymer battery
Lithium polymer batteries, the raw materials are generally mixed with lithium cobalt oxide, lithium manganate, and ternary lithium. Through a certain proportion of the three mixtures, a certain process is used to make the outer packaging mainly using aluminum plastic film. The lithium material in the middle is a paste. The shape can be customized.
The biggest safety problem of lithium polymer batteries is that leakage and short circuit may cause bulging problems, and the most serious situation will cause combustion and sparks.
Compare 18650 cells and lithium polymer cells
The 18650 battery and the lithium polymer battery are different in raw materials. The raw materials for 18650 batteries are lithium iron phosphate, lithium manganate and ternary. These materials are generally used for lithium polymer batteries. It is a mixture of various materials such as lithium cobaltate, lithium manganate, and ternary lithium. The former has a single raw material, while the latter is rich in raw materials.
The safety of the two is also very different. The 18650 battery is likely to explode due to the steel shell packaging. However, the beginner who wants to assemble may not be able to distinguish the 18650 battery that he traded. Whether the quality is passed, for the novice, the 18650 battery is difficult to get started.
The safety of lithium polymer batteries is higher than that of 18650 batteries, because the packaging structure of lithium polymer batteries is made of a layer of aluminum plastic film on the outside, and a layer of high temperature tape is applied outside. That is, it produces combustion, not a direct explosion.
The energy density of lithium polymer cells is also higher than that of liquid 18650.
In general, when assembling lithium batteries, the assembly of lithium battery packs is preferred by the beginners. Lithium polymer batteries are preferred because of their high energy ratio and high safety. Important, after all, to protect your own personal safety, you can do what you like better.