Which is better, polymer battery or 18650 lithium battery?

In the current mobile power market, there are generally two types of batteries, one is 18650 batteries, and the other is polymer batteries. These two batteries dominate the market for the vast majority of the lithium battery industry. In many netizens mentioned mobile power batteries, the mobile power network here is an explanation of the two types of batteries commonly used in mobile power.

18650 is the industry's statement, that is, the battery has a diameter of 18mm and a length of 65mm. The cylindrical battery is mainly produced by Sanyo, Panasonic, Samsung, and Sony. There are also some manufacturers in China that produce 18650, but the reputation and the impact is not as big as the three above, and Panasonic has actually become the world's largest production plant for the 18650 due to the acquisition of Sanyo.

18650 capacity regular size:

Generally there are 2200mAh, 2400mAh, 2600mAh, 2800mAh capacity standard. According to industry insiders, the current 18650 has achieved a maximum single-block capacity of 3400mAh. If the mobile power source uses 18650 as the battery core, it is basically the above several specifications and connected together.

18650 packaging:

18650 is generally packaged in steel, that is, 18650 lithium ions are in a liquid state, just like a cup filled with water, similar to this understanding. Therefore, the 18650 can only be cylindrical. If you buy a mobile power supply and see a thick and large mobile power supply, it is basically 18650 batteries.

Due to the particularity of the 18650 package (with steel shell), if the quality of the products produced is not enough, the biggest danger is the explosion. The explosion caused by the notebook in previous years is because of Sony's laptop battery (usually using 18650). There is a problem with quality control.

Lithium polymer battery:

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, and the lithium material in the middle is paste. So the shape can be customized. At the same time, you can make ultra-thin batteries, such as ultra-thin batteries such as 0.33mm and 0.50mm.

Lithium polymer battery capacity:

Since the polymer battery can be of any size, it has no standard shape. The general volume is marked as long * wide * thick. In addition, the battery has a positive and negative tolerance, the length and width are 0.5 mm, and the thickness is 0.55 mm. (The two positive and negative tolerances, some memory is unclear, do not know whether it is correct, but does not affect the reading of ordinary users, so explain.) Polymer is the size of the volume according to the size of the volume, but also with the use the ratio of lithium raw materials is related.

The outer surface of the polymer battery is made of a layer of aluminum plastic film, and a layer of high-temperature adhesive tape is applied outside. The maximum safety of the polymer is that it leaks, short circuit, and causes the package to rise. The worst case is the burning and the flame. Therefore, compared with the 18650, the polymer battery is safer. However, burning also poses a safety hazard, so users who use mobile power are advised not to put the mobile power on the pillows, these places on the bed.

It is worth reminding that security is not absolute. The quality of the 18650 battery is much better than the inferior polymer battery, so the masses still have to polish their eyes to distinguish.

In the case of cell quality assurance, the size of the 18650 will be larger than that of the polymer, so the polymer cell will be lighter in terms of portability.