Analysis on the advantages and disadvantages of 18650 lithium battery

Overview of 18650 lithium battery 18650 is the standard lithium battery model adopted by Sony. This Japanese company is the pioneer of lithium battery in order to save costs. 18 indicates a diameter of 18mm, 65 indicates a length of 65mm, and 0 indicates 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. The advantages and disadvantages of 18650 lithium battery: 1. The capacity of large-capacity 18650 lithium battery is generally between 1200mah and 3600mah, while the general battery capacity is only about 800mah. If the 18650 lithium battery pack is combined, the 18650 lithium battery pack can exceed 5000mah. 2. Long-life 18650 lithium battery has a very long life, and the cycle life of normal use 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, no explosion, no burning; non-toxic, non-polluting, RoHS trademark certification; all safety functions are completed at one time, and the number of cycles exceeds 500 times. Good high temperature resistance, 100% power efficiency below 65 degrees. 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 18650 lithium battery is generally 3.6v, 3.8v, 4.2v, which is much higher than the 1.2v voltage of nickel-hydrogen nickel-cadmium battery. 5. There is no memory 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 even be less than 35m, which greatly reduces battery power consumption and extends the standby time of mobile phones. The level it can reach is fully in line with international standards. . Lithium polymer, which supports large discharge current, is an ideal choice for remote control models and is the most promising material to replace Ni-MH batteries. 7. Can it be combined in series and parallel to synthesize 18650 lithium batteries. 8. Widely used electronic equipment, such as notebook computers, walkie-talkies, portable DVDs, instruments, audio equipment, model airplanes, toys, camcorders and digital cameras. Defects of 18650 lithium battery: The biggest disadvantage of 18650 lithium battery is its fixed size, which is not easy to locate when installed in some notebook computers or products. Of course, this defect can also be said to be an advantage. Compared with other lithium polymer batteries that can be customized and the size can be changed, this is a defect. This is an advantage, some products specify battery specifications. 18650 lithium batteries are prone to short-circuit or explosion, which is also related to polymer lithium batteries. If compared with ordinary batteries, this defect is not so obvious. There must be 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 disadvantage of lithium batteries, because lithium batteries are selected from lithium cobalt acid data, and lithium cobalt acid data cannot discharge large currents, which is poor in safety. The 18650 lithium battery requires higher processing conditions. Compared with general battery processing, 18650 lithium batteries require higher processing conditions, which undoubtedly increases processing costs. 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: Introduce the activation of lithium batteries