Analysis of requirements for 18650 lithium ion batteries and 18650 lithium ion batteries

Uses: Because of the large capacity per unit density, it is often used in most notebook batteries. In addition, it is also often used in high-end bright flashlights, portable power supplies (mobile chargers), and so on. Size: The numbers 18650 represent the appearance size: 18 refers to the battery diameter of 18.0mm, and 650 refers to the battery height of 65.0mm. (Our ordinary No. 5 battery [AA battery], size is 14500) Type: 18650 batteries have lithium ion batteries and nickel-hydrogen batteries, because nickel-hydrogen batteries are now rarely used, so now we are talking about 18650 batteries, without special instructions. It is a batch of 18650 lithium ion batteries. Voltage and capacity specifications: Ni-MH battery voltage is 1.2V, common capacity is 4500MAH, lithium ion battery voltage is 3.6V-3.7, common capacity is 1500MAH-2600MAH, and the current maximum capacity is 3000MAH. 18650 lithium ion battery requires 18650 lithium ion battery, which has great advantages compared with the commonly used No. 5 battery in terms of weight, volume and capacity. For example, a 2400MAH 18650 battery, the voltage is calculated according to the standard 3.7V, and the power is 8880MWH. The best Sanyo No. 5 rechargeable battery, ENELOOP, has a capacity of 2000MAH, a voltage of 1.2V, and a power of 2400MWH. It can be seen that a good 18650 battery has a power capacity close to 4 times that of the AA battery. The capacity of 18650 lithium-ion battery is generally between 1200mah~3600mah, and the general battery capacity is only about 800. If 18650 lithium-ion batteries are combined to form a 18650 lithium-ion battery pack, the 18650 lithium-ion battery pack can easily break through 5000mah. The 18650 lithium-ion battery has a very 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. The voltages of 18650 lithium-ion batteries are generally 3.6V, 3.8V and 4.2V, which are much higher than the 1.2V voltages of nickel-cadmium and nickel-hydrogen batteries. 18650 lithium ion battery has high safety performance, non-explosive, non-combustible; non-toxic, non-polluting, and has passed RoHS trademark certification; various safety performances are completed in one go, and the number of cycles is more than 500; high temperature resistance performance is good, and the discharge efficiency can reach 100 at 65 degrees. %. In order to prevent the battery short-circuit phenomenon, the positive and negative electrodes of the 18650 lithium-ion battery are separated. Therefore, the short-circuit phenomenon may have been reduced to the extreme. A protection board can be installed to prevent overcharge and overdischarge of the battery, which can also extend the service life of the battery. 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 post: How to heat the lithium-ion battery at low temperature