At present, in the 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, I am here to explain the two types of batteries commonly used in mobile power.
18650 batteries
18650 is a standard lithium-ion battery model set by Japan SONY Company in order to save costs. Among them, 18 means diameter is 18mm, 65 means length is 65mm, 0 means cylindrical battery, common 18650 battery is divided into lithium. Ion battery, lithium iron phosphate battery.
18650 capacity regular size
There are generally 2200mAh, 2400mAh, 2600mAh capacity standards. 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
The 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.
18650 security
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
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, 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 cell 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. (These two positive and negative tolerances. Therefore, the polymer is determined by the size of the volume, and also related to the ratio of the use of lithium raw materials.
Lithium polymer battery safety
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 better in terms of safety. 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.
At present, the mobile power market, the relatively large shipments are still 18650, the vast majority of mobile power is using 18650.
At present, the vast majority of high-end mobile power market is using polymer batteries to do mobile power. From a certain degree, it is recommended that users buy mobile power of poly and battery cells better, especially for large capacity. Mobile power, such as 8000mA or more, if there is a safety accident, it is not fun, and the mobile power supply of the polymer battery is at most a small spark, which is unlikely to cause an explosion.