What kind of materials are used for the 18650 lithium battery?

What are the components of the 18650 lithium battery? The working principle of a lithium battery is the principle of charge and discharge. When the battery is charged, lithium ions are formed at the positive electrode of the battery, and the lithium ions reach the negative electrode through the electrolyte. Carbon, that is, the negative electrode, has a layered structure with many micropores, and the lithium ions reaching the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions are inserted, the greater the charging capacity. 18650 is only the battery specification model, it can be divided into lithium ion 18650, lithium iron phosphate 18650, nickel hydride 18650 (very rare), ordinary lithium ion 18650. Ordinary 18650 lithium batteries are divided into lithium batteries, lithium iron phosphate batteries and nickel-hydrogen batteries. The number in the 18650 lithium battery indicates the appearance specification: 18 indicates the battery diameter is 18.0mm, and 650 indicates the battery height is 65.0mm. Common 18650 batteries include lithium batteries, lithium iron phosphate batteries and nickel-metal hydride batteries. The voltage and capacity specifications are nickel-hydrogen battery voltage of 1.2v, normal capacity of 2500MAH, lithium battery voltage of 3.6v, and normal capacity of 1500MAH-3100MAH. 1. The capacity of a large-capacity 18650 lithium battery is generally between 1200mah and 3100mah, while the general battery capacity is only about 800. Assuming the combination of 18650 lithium battery packs, the 18650 lithium battery pack is sloppy and can exceed 5000mah. 2. Long-life 18650 lithium battery has a very long life, and its normal life cycle can reach more than 500 times, which is more than twice that of ordinary batteries. 3. High safety function: 18650 lithium battery has high safety function; it will not explode or burn; non-toxic, non-polluting, RoHS trademark certification; various safety functions, when iron is hot, the cycle times are more than 500 times; high temperature resistance performance Well, the 65-degree power supply drops to 100%. In order to prevent short circuits, the positive and negative electrodes of the 18650 lithium battery are separated. So its short circuit may have been restricted. It can be added to the maintenance board to prevent overcharge and overdischarge of the battery, which can also extend the battery life. The voltage of 4.18650 lithium battery is generally above 3.6 and 3.7, which is much higher than the 1.2v voltage of nickel-hydrogen nickel-cadmium battery. 5. There is no recall effect before charging, no blank, easy to use. 6. The internal resistance is small. The resistance of polymer batteries is less than that of liquid batteries. The internal resistance of domestic polymer batteries can be less than 35m, which greatly reduces battery power consumption and prolongs the standby time of mobile phones, which can reach the world level. Lithium polymer that supports large discharge currents is ideal for remote control models and is the most promising alternative to nickel metal hydride batteries. 7. Can 18650 lithium batteries be synthesized in series and parallel 8. Laptops, walkie-talkies, portable DVDs, instruments, audio equipment, model airplanes, toys, camcorders, digital cameras and other electronic equipment are widely used. The biggest disadvantage of 18650 lithium batteries is it The volume has been fixed, and it is not easy to install in a notebook or some products. Of course, this shortcoming can also be considered an advantage, which is related to other lithium polymer batteries and lithium batteries can be customized and can be changed in size will be a disadvantage . This is an advantage, some products specify battery specifications. The 18650 lithium battery is prone to short-circuit explosion, which is also related to the lithium polymer battery. Assuming that the battery is relatively ordinary, this shortcoming is not so obvious. There is a maintenance line for processing 18650 lithium batteries to prevent battery overcharge and discharge. Of course, this is necessary for lithium batteries, which is also a common shortcoming of lithium batteries, because the material of lithium batteries is lithium cobalt acid materials, and lithium cobalt acid materials lithium batteries cannot discharge large currents, and their safety is poor. 18650 lithium battery is generally composed of positive electrode material and negative electrode material. The positive electrode materials include lithium nickelate, lithium manganate, lithium tribasic acid, lithium iron phosphate, etc. The negative electrode materials generally include amorphous carbon materials, graphitized carbon materials, silicon-based materials, nitrides, and new alloys. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.