The 18650 battery is cylindrical and has liquid inside. Because of the battery design and materials, 18650 is suitable for high current. Therefore, almost all notebooks and electric vehicles are designed with 18650 batteries. Only super notebooks can save energy without using 18650 batteries. Instead, use polymer lithium batteries, especially tablet computers. Digital cameras require only 18650-like batteries because of the large voltage and instantaneous current required for charging and discharging the flash.
Polymer lithium batteries have the advantages of small size and large capacity. The disadvantage is that the life is shorter than 18650. Because different designs and materials are used, some have liquid inside, some are dry or colloidal, and the performance is not as good as 18650 when discharged at high current 18650 Cylindrical batteries, so large-capacity and small-volume electrical equipment is required. Polymer lithium batteries are usually used, and the most typical manifestations are mobile phones, tablet computers and other devices.
Advantages of 18650 lithium battery:
1.Large capacity
The capacity of 18650 lithium battery is generally between 1200mah ~ 3400mah, and the general battery capacity is only about 800. If combined into an 18650 lithium battery pack, the 18650 lithium battery pack can easily break through 5000mah.
2.Long life
The 18650 lithium battery has a long service life, and 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, no explosion, no combustion; non-toxic, no pollution, RoHS trademark certification; all kinds of safety performance in one go, cycle times greater than 500 times; good high temperature resistance, discharge efficiency up to 100% at 65 degrees . To prevent battery short circuit, the positive and negative electrodes of 18650 lithium batteries are separated. So the possibility of its short circuit has been reduced to the extreme. A protection board can be added to avoid overcharging and overcharging the battery, which can also extend the battery life.
4.High voltage
The voltage of 18650 lithium battery is generally 3.6V, 3.8V and 4.2V, which is much higher than the 1.2V voltage of nickel-cadmium and nickel-hydrogen batteries.
5.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 35mΩ, which greatly reduces the self-power consumption of the battery and extends the standby time of the mobile phone. International level. This kind of polymer lithium battery that supports large discharge current is an ideal choice for remote control model, and it has become the most promising product to replace nickel-metal hydride battery.
7, can be combined in series or parallel to form 18650 lithium battery pack
8.Applacations of 18650 Li-ion battery packs
1.electric toothbrush、Face Cleaner、Electric Shaver ，vacuum cleaner
2. Digital products、POS device,Sport equipmen
3. GPS, PDA, E-book , portable DVD, laptop, tablet PC, power bank
4. Electric Toys, RC helicopters, Electric tools
Post time: Dec-05-2019
