Briefly explain the advantages, disadvantages and uses of 18650 lithium-ion batteries

18650 lithium-ion battery is a type of lithium-ion battery, is the originator of the lithium-ion battery. 18650 actually refers to the size of the battery model, the common 18650 battery is also divided into lithium-ion batteries and lithium iron phosphate batteries, 18650 in the 18 refers to the diameter of the lithium-ion battery is 18mm, 65 indicates the length value of 65mm, 0 indicates that belong to the cylindrical battery.

Advantages of 18650 lithium-ion battery

1, Large capacity: 18650 lithium-ion battery capacity is generally between 1200mah ~ 3600mah, while the general battery capacity is only about 800mah, if combined into 18650 lithium battery pack, that 18650 lithium battery pack is casually can break through 5000mah.

2, Long life: 18650 lithium-ion batteries have a long life, the cycle life of normal use can be more than 500 times, which is more than twice the ordinary battery.

3, High safety performance: 18650 lithium-ion battery safety performance is high, in order to prevent the battery short-circuit phenomenon, 18650 lithium battery positive and negative electrodes are separated. So the possibility of short circuit has been reduced to the extreme. You can add a protection plate to avoid overcharging and overdischarging the battery, which also extends the service life of the battery.

4, High voltage: 18650 Li-ion battery voltage is generally at 3.6V, 3.8V and 4.2V, much higher than the 1.2V voltage of NiCd and NiMH batteries.

5, No memory effect. No need to empty the remaining power before charging, easy to use.

6, Small internal resistance: The internal resistance of polymer cells is smaller than that of general liquid cells, and the internal resistance of domestic polymer cells can even be less than 35mΩ, which greatly reduces the battery's self-consumption and extends the standby time of cell phones, and can completely reach the level of international standards. This kind of polymer lithium battery that supports large discharge current is ideal for remote control models, becoming the most promising alternative to NiMH batteries.

7, It can be combined in series or parallel to form 18650 lithium battery pack.

8, Wide range of use Laptop computers, walkie-talkies, portable DVDs, instruments, audio equipment, model airplanes, toys, video cameras, digital cameras and other electronic equipment.

Disadvantages of 18650 Li-ion battery

18650 lithium-ion battery's biggest disadvantage is that his volume has been fixed, installed in some notebooks or some products are not very good positioning, of course, this disadvantage can also be said to be an advantage, which is relatively other lithium polymer batteries and other lithium batteries can be customized and can change the size of this is a disadvantage. And relative to some specified battery specifications of the product has become an advantage.

18650 lithium battery production are required to have a protection line to prevent the battery is overcharged and lead to discharge. Of course, this is necessary for lithium batteries, which is also a general disadvantage of lithium batteries, because the lithium battery materials used are basically lithium cobaltate material, and lithium cobaltate material lithium batteries can not be discharged at high current, poor safety.

18650 lithium-ion batteries require high production conditions, compared to the general production of batteries, 18650 lithium batteries require high production conditions, which undoubtedly increases the cost of production.

18650 lithium-ion battery uses

18650 battery life is theoretically 1000 times of cycle charging. Because of the large capacity per unit density, it is mostly used in laptop batteries. In addition, 18650 is widely used in various electronic fields because of its excellent stability in work: commonly used in high-grade flashlight, portable power, wireless data transmitter, electric heating and warm clothes, shoes, portable instruments, portable lighting equipment, portable printer, industrial instruments, medical instruments, etc.


Post time: Feb-21-2023