What is the difference between 18650 batteries and polymer batteries?Who is better?

zhushican2年前 (2025-04-29)手绘知识383

Because of the particularity of the 18650 packaging (steel shell is used), if the quality of the products produced is not high, the danger is that the incidents that occurred in the notebook many years ago are due to the quality control of Sony's notebook batteries (18650 is used individually). There is a problem. 　　For lithium polymer batteries, the raw materials are individually mixed with lithium cobalt oxide, lithium manganese oxide, and ternary lithium.After a certain proportion of the three confusions, it is manufactured by a certain process. The outer packaging is mainly made of aluminum-plastic film, and the lithium material in the center is a paste.Therefore, the shape may be customized arbitrarily.Together, it is possible to create ultra-thin batteries, for example, ultra-thin batteries such as 0.33mm and 0.50mm.

　　A layer of aluminum-plastic film is used on the outside of the polymer battery, and a layer of high-temperature tape is coated on the outside. The insurance of the polymer battery is leakage and short circuit, which leads to the expansion of the package. In bad conditions, incineration and flames are generated. 　　Therefore, compared with 18650, polymer batteries are better in terms of insurance.However, incineration can also bring insurance risks, so users who use mobile power supplies should try not to place mobile power supplies on pillows and beds. 　　18650 belongs to the same lithium battery as polymer. 18650 is full of lithium iron phosphate and lithium manganese acid on the market. Let's simply make a ternary one. The price of ternary raw material 18650 is moderate. The market price of 1800 mAh is about 7 yuan for domestic products. The nominal voltage is 3.8V. The voltage may reach 4.2V when applied, and the low voltage can reach 2.5V. There is no memory effect. The scope of application D is also relatively wide, and the level of domestic skills is also possible to support domestic production.The polymer batteries I have seen are mainly soft-packed. There are energy-based and capacity-based. The raw materials are not much different from 18650, except that 18650 is a stainless steel shell, and the polymer is an aluminum-plastic film shell, which is used in industry and means of transportation.