How powerful is the explosion of an 18650 battery?

How big is the power of the 18650 battery? 18650 is the founder of the lithium battery. Japan's Sony Corporation has launched a standard lithium battery type in order to save costs. 18 means a diameter of 18mm, 65 means a length of 65mm, and 0 means a cylindrical battery. Ordinary 18650 batteries are divided into lithium batteries and lithium iron phosphate batteries. The rated voltage of the lithium battery is 3.7v, the charging cut-off voltage is 4.2v, the rated voltage of the lithium iron phosphate battery is 3.2v, the charging cut-off voltage is 3.6v, the general capacity is 1200mAh-3350mAh, and the general capacity is 2200mAh-2600mAh. Many people have a misunderstanding that as long as the battery is very dangerous, especially the lithium battery is very unsafe, it will burst! Is the 18650 battery as dangerous as it sounds? In order to find out the truth, you need to know what an 18650 battery is ?18650 lithium battery The 18650 we often say actually refers to the appearance standard of the battery. It is a standard battery type set by Sony in Japan at that time to save costs. 18 means the diameter is 18mm, 65 means the length is 65mm, and 0 means Cylindrical battery. 18650 batteries originally referred to nickel-metal hydride batteries and lithium batteries, because nickel-metal hydride is now less used, so now it refers to lithium batteries. The nominal voltage of a single unit of 18650 lithium battery is generally 3.6v or 3.7v. The minimum discharge termination voltage is generally 2.75v. The general capacity is 1200~3000mAh, higher than 3400mAh may be a virtual standard. Since Sony introduced the 18650 battery in the 1990s, it has been enduring. Due to its large capacity, high storage efficiency, good stability, no memory effect, high cycle life, and no toxic substances, 18650 batteries are widely used in industrial and electronic equipment such as laptops, walkie-talkies, instruments, and Tesla. The world's hottest 18650 battery electric vehicle is also supplied by Panasonic. Why does the lithium battery explode? Most of the 18650 batteries are encapsulated in a steel case. Due to the lack of maintenance functions, the internal pressure of the battery will suddenly increase in the case of overcharge (overcharge), and it will exceed the bearing value. Will burst. Short circuit, high temperature, battery squeeze and deformation, or even puncture, etc. may cause the battery to burst. What is a lithium battery safety valve? After 30 years of development, the 18650 battery preparation technology is now very mature. In addition to greatly improved performance, its safety is also very complete. In order to prevent the sealed metal casing from bursting, the 18650 battery now has a safety valve on the top, which is the standard for every 18650 battery and the most important explosion-proof barrier. When the internal pressure of the battery is too high, the top safety valve will open the exhaust to release the pressure and prevent explosion. However, when the safety valve is opened, the chemicals released by the battery will react with oxygen in the air at high temperatures, and a fire may still occur. In addition, some 18650 batteries now have their own maintenance boards, which have functions such as overcharging and short-circuit maintenance, and their safety performance is very high. The previous mobile power explosions that broke the safety valve were all because manufacturers used inferior 18650 batteries in order to save money, and even caused second-hand waste. Now the 18650 batteries processed by important battery manufacturers, such as Panasonic, Sony, Samsung, etc. are actually very safe, and the battery utilization rate in 18650 is very high. We can use it correctly in daily use and prevent battery short circuit, damage or temperature. If it is too high, you don't have to worry about the battery breaking. We cannot use a bamboo pole to overturn a boatman and use a low-quality product to judge the safety of 18650. How powerful is the 18650 battery? From the internal structure data, the lithium battery should be called a polymer lithium battery. Specifically divided into semi-polymer lithium batteries and all-polymer lithium batteries, their burst time is almost the same as that of semi-polymer lithium batteries. Because it is a semi-liquid internal structure, it will have a heating short circuit from the outside, it will add too much voltage, it will have too much internal pressure, and then it will burn and explode. We call on everyone to try not to use this kind of battery lithium polymer battery. It has the advantages of low internal resistance, high output, and much higher safety than semi-polymer batteries! Disclaimer: Some pictures and content of articles published on this site are from the Internet, such as If there is any infringement, please contact to delete the previous article: What heated discussion has the graphene battery caused?