Analyze the internal structure of 18650 batteries

18650 battery internal structure (steel shell. cover. safety valve. copper foil. aluminum foil) 18650 battery is one of the most commonly used batteries in mobile power and notebook batteries. Its common form is a cylindrical battery with a diameter of 18mm and a length of 65mm. The most common lithium battery on the market is a cylindrical (cylindrical) packaging method, which is most widely used in the field of notebooks, strong light flashlights, so the advantages of packaging are uniformity, easy automation, and large-scale processing; mobile phones and tablets A common mobile (square) bag on a computer. The most immediate benefit of this kind of packaging is that they are very thin, allowing you to control the thickness of the product. Many netizens talked about the 18650 battery, worried that it is full of liquid lithium ion, talked about the color change of the 18650, panic explosion. For this reason, some netizens took an 18650 battery and took it apart to see what happened inside. The violent disintegration of 18650 cells gives us insight into its internal material structure. First, when disassembling the battery, remember to discharge lightly. Here, discharge the 18650 battery to no voltage failure. The violent disintegration of 18650 cells allowed us to gain insight into the internal material structure and then use needle-nose pliers to violently separate the positive and negative steel shells from the battery cover, exposing the safety valve and the rolled positive and negative materials. The violent disintegration of 18650 cells gives us insight into its internal material structure. The safety valve is a standard part of every 18650 battery and one of the most important explosion-proof barriers. The working principle of the safety valve: When the internal temperature of the battery is abnormal and the air pressure rises to 1.0-1.2mpa, the safety valve opens to exhaust the internal gas to prevent explosion due to excessive pressure. In columnar cells, the most common pregnancy bulge occurs when internal pressure increases. The violent disintegration of 18650 cells gave us insight into the internal material structure of 18650 cells. The violent disintegration of 18650 cells gave us insight into the internal material structure. Let us do some scientific research on the positive electrode inside the cell. Currently on the market, the 2000-3000mah capacity commonly used by Samsung, Panasonic, Sanyo, LG and other companies, the internal anode material has been upgraded from the first generation LiCoO2 lithium cobalt acid to a ternary material, and the chemical name is lithium cobalt manganese nickel cobalt. Direct benefits: longer service life, greater safety, and better performance. Speaking of which, the prismatic square soft bag packaging mobile phone flat battery uses LiNi-Co-MnO2 nickel cobalt manganese material, but the 18650 cylindrical package is different. The violent disintegration of 18650 cells allows us to gain insight into the structure of its internal material. Finally, we carefully observe the material inside the cell. Copper foil is used to coat the lini-co-mno2 nickel cobalt manganese anode material, and aluminum foil is used to coat graphene. The capacity of the battery is determined according to the ratio of these formulas. Imitation is risky, and dismantling is prudent. Conclusion: After the 18650 battery is disassembled violently, it is found that there is no liquid flowing out of the battery, so there is no liquid lithium ion and it is easy to explode. In fact, under normal circumstances, as long as it is used normally, the 18650 battery does not pose a safety hazard, but it is live and is not affected by extreme conditions. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How far is the hydrogen fuel-powered battery car from us?