18650 electric core and polymer electric core

I believe many people have heard that the 18650 electric core has the danger of explosion, and the worst case of the polymer electric core is that it will not explode if it catches fire, so the polymer electric core is safer than the 18650 electric core. In fact, it is true in theory, but it is not true in reality. 18650 electric core is packed in steel shell, which is not easy to deform. After long-term development, the technology is now very mature. For example, 18650 electric cells produced by Panasonic, Sony, Samsung and other international manufacturers have stable discharge performance, stable endurance, and are guaranteed by excellent circuit design. The probability of explosion is very low. Although the polymer core is safer in theory, the lithium ion inside the core is pasty, and the aluminum plastic film is used for packaging outside, which is soft, easy to deform, and not resistant to collision. Therefore, the technology is difficult, and the production requirements for manufacturers are high. At present, there are few domestic manufacturers that can produce high-quality polymer electric cores. The overvoltage protection adopted by different manufacturers varies greatly. Therefore, in the domestic market, polymer electric cores are not necessarily safer than 18650 electric cores.

The larger the capacity, the better

Since capacity is the most important parameter that affects the usage time of mobile power, many people believe that the larger the capacity of mobile power is, the better. During this period of time, searching the sales ranking of mobile power on Taobao, we can see that the mobile power with a capacity of tens of thousands before has been weak, and it is often 20000 or even 30000 mA. So, is the larger the mobile power supply, the better? A mobile power supply with a capacity of more than 10000 mA usually has 5 to 6 cells. We know that the capacity of the mobile power supply is proportional to its volume. The larger the capacity, the larger the volume. Therefore, when selecting and purchasing, we should follow our own needs. If we don't travel frequently, we don't need to take a "brick" everywhere. Moreover, the phenomenon of false labels in the market is still very serious. Bad manufacturers use high capacity to deceive consumers, while the actual capacity of products is far lower than the standard capacity. Therefore, we should not trust these super large capacity mobile power supplies.