Can the safety valve really make the 18650 lithium battery safer?

As we all know, lithium battery safety valve is not so unfamiliar to ordinary users. As the standard safety valve of 18650 lithium ion battery, all manufacturers agree that it can improve the safety performance of 18650 lithium battery, so the safety valve can really make 18650 Are lithium batteries safer? Will the lithium battery not explode with a safety valve? First of all, I will give a brief introduction to the 18650 lithium-ion battery; what we often say today actually refers to the battery's appearance specification, which is the standard battery model developed by Sony in order to save costs. Among them, 18 is a diameter of 18mm, 65 is a length of 65mm, and 0 is a cylindrical battery. 18650 batteries originally referred to nickel metal hydride batteries and lithium ion batteries, because nickel metal hydride is now used less frequently, it now refers to lithium ion batteries. The nominal voltage of a single 18650 lithium ion battery is generally 3.6v or 3.7v. The minimum discharge termination voltage is generally 2.75v. The general capacity is 1200~3500mAh, higher than 3500mAh is probably the wrong standard. This kind of battery has existed since Sony introduced the 18650 battery in the 1990s. 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 notebook computers, walkie-talkies, instruments, and even the hottest in the world. The Tesla 18650 battery electric car is also supplied by Panasonic. Why do lithium-ion batteries explode? Most 18650 batteries are packaged in steel cases. The 18650 battery without safety valve in the early days lacked protection function, and the internal pressure of the poor quality battery would suddenly increase when overcharged (overcharge), and it would explode if it exceeded the load-bearing value. Short circuit, high temperature, battery squeeze and even breakdown can cause the battery to explode. A short circuit will directly cause the high temperature of the lithium battery, and the high temperature will also ignite the electrolyte inside the battery, which will eventually deteriorate into a violent reaction. What is a lithium-ion battery safety valve? After 30 years of development, the 18650 battery preparation process has been very mature. In addition to a great improvement in performance, its security is also perfect. In order to prevent the metal casing from exploding, the battery is now equipped with a safety valve on the top. The safety valve is now a standard part of every 18650 lithium battery and the most important barrier. When the internal pressure of the battery is too high, the top safety valve opens to exhaust and reduce pressure to prevent explosion. However, when the safety valve is opened, the chemical substances leaking from the battery will react with oxygen in the air at high temperatures and still cause a fire. In addition, most of the 18650 batteries now come with a protective panel, with overcharge, overdischarge and short circuit protection functions, and have high safety performance. How to place the 18650 lithium battery explosion accident; it happened before the mobile power explosion, because the manufacturer used inferior 18650 batteries by all means in order to save costs, and even used second-hand waste batteries to assemble. The current important production of 18650 battery battery manufacturers such as Panasonic, Sony, Samsung, etc. are actually very safe, and the battery utilization rate in 18650 is very high, we can do the correct use of the battery in daily use and prevent short circuit, damage or excessive Temperature, don’t worry about the battery exploding. We cannot judge the safety of inferior products in 18650 by overturning a boat with a bamboo pole. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What is the difference between the 18650 lithium battery with the protection board and the without protection board?