Overview of the advantages and disadvantages of 18650 lithium batteries

18650 is the originator of the lithium battery-a standard lithium battery model set by the Japanese SONY company in order to save costs. Among them, 18 means a diameter of 18mm, 65 means a length of 65mm, and 0 means a cylindrical battery. Common 18650 batteries are divided into lithium batteries and lithium iron phosphate batteries. The nominal voltage of the lithium battery is 3.7v, the charge cut-off voltage is 4.2v, the nominal voltage of the lithium iron phosphate battery is 3.2V, the charge cut-off voltage is 3.6v, the capacity is usually 1200mAh-3350mAh, and the common capacity is 2200mAh-2600mAh. Advantages and disadvantages of 18650 lithium battery: 1. Large capacity 18650 lithium battery is generally between 1200mah and 3600mah, while the general battery capacity is only about 800mah. If combined into a 18650 lithium battery pack, the 18650 lithium battery pack is casual It can break through 5000mah. 2. Long life The 18650 lithium battery has a long service life. The cycle life can reach more than 500 times in normal use, which is more than twice that of ordinary batteries. 3. High safety performance 18650 lithium battery has high safety performance, non-explosive, non-combustible; non-toxic, non-polluting, and has passed RoHS trademark certification; various safety performances can be achieved in one go, and the number of cycles is greater than 500; high temperature resistance performance is good, under 65 degrees The discharge efficiency reaches 100%. In order to guard against the battery short-circuit phenomenon, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, the short-circuit phenomenon may have been reduced to the extreme. A protection board can be installed to guard against overcharge and overdischarge of the battery, which can also extend the service life of the battery. 4. High voltage 18650 lithium battery voltage is generally 3.6V, 3.8V and 4.2V, much higher than the 1.2V voltage of nickel-cadmium and nickel-hydrogen batteries. 5. There is no memory effect. It is not necessary to empty the remaining power before charging, which is convenient to use. 6. Small internal resistance: The internal resistance of polymer batteries is smaller than that of ordinary liquid batteries. The internal resistance of domestic polymer batteries can even be less than 35m, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone. In time, it can fully meet the international standards. This kind of polymer lithium battery that supports large discharge current is an ideal choice for remote control models, and it has become the most promising product to replace nickel-metal hydride batteries. 7. It can be combined in series or parallel to form 18650 lithium battery packs. 8. Wide range of use: notebook computers, walkie-talkies, portable DVDs, instrumentation, audio equipment, model airplanes, toys, camcorders, digital cameras and other electronic equipment. undefinedundefinedundefined Disadvantages: The biggest disadvantage of 18650 lithium battery is that its volume has been fixed, and it is not well positioned when installed in some notebooks or some products. Of course, this disadvantage can also be said to be an advantage, which is compared to other polymer lithium batteries. This is a disadvantage in terms of the customizable and changeable size of the lithium battery. And for some products with specified battery specifications, it has become an advantage. 18650 lithium battery is prone to short circuit or explosion, which is also related to polymer lithium battery. If it is relatively ordinary battery, this shortcoming is not so clear. 18650 lithium battery processing must have a protection circuit to prevent the battery from being overcharged and causing discharge. Of course, this is a must for lithium batteries. This is also a common drawback of lithium batteries, because the materials used in lithium batteries are basically lithium cobalt oxide materials, and lithium cobalt oxide materials cannot be discharged at high currents and are safe. Poor. 18650 lithium batteries require high processing conditions. Relative to general battery processing, 18650 lithium batteries require high processing conditions, which undoubtedly increases processing costs. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement.