18650 lithium battery size and advantages analysis

18650 lithium battery size The 18650 lithium battery is a lithium battery named after the battery size. As far as a single battery is concerned, the 18650 lithium battery has two sizes: a bare battery and a finished battery. The latter is numerically larger than the former. Know the size of the 18650 lithium battery May have to start from its origin. The naming of secondary batteries by size is one of the requirements of the International Electrotechnical Commission (IEC). According to the IEC61960 standard, the identification methods for secondary lithium batteries are as follows: 1. Battery identification composition: 3 letters followed by 5 numbers, cylindrical or 6 Square numbers; 2. The first letter indicates the negative electrode material of the battery: I indicates the lithium ion with built-in battery, L indicates the lithium metal electrode or lithium alloy electrode; 3. The second letter indicates the positive electrode material of the battery: C based on cobalt Electrodes, N based on nickel, M based on manganese, V based on vanadium; 4. The third letter indicates the shape of the battery: R indicates a cylindrical battery, L indicates a square battery; 5. Numbers: cylindrical battery 5 Each number represents the diameter and height of the battery. The unit of diameter is millimeter and the unit of height is one-tenth of a millimeter. When either diameter or height is greater than or equal to 100mm, a diagonal line should be added between the two dimensions; square type The 6 numbers of the battery respectively represent the thickness, width and height of the battery, in millimeters. When any of the three dimensions is greater than or equal to 100mm, a diagonal line should be added between the dimensions; if any of the three dimensions is less than 1mm. The above descriptions about the size of 18650 lithium batteries are approximate numbers. There will be slight differences in the products of various battery manufacturers, but they are not very different, that is, on the basis of a design with a diameter of 18m and a height of 65.0mm, the difference is generally ±0.2mm in diameter , The height is between ±2.0mm; to identify 18650 lithium batteries, similar performance is the essence. Having said that, we understand that when the concept of 18650 lithium battery size is mentioned, there may be two different meanings: one is a bare 18650 lithium battery size. In this sense, battery manufacturers include Sanyo, Panasonic, Samsung, LG, BAK, etc.; the other is the size of the encapsulated 18650 lithium battery. The size in this sense is definitely greater than the size of the bare 18650 lithium battery. Therefore, we must pay attention to the concept of the 18650 lithium battery size. Locale. The advantage of the 18650 lithium battery is large. The capacity of the 18650 lithium battery is generally between 1200mah and 3100mah, while the general battery capacity is only about 800. If combined into a 18650 lithium battery pack, the 18650 lithium battery pack can easily break through. 5000mah. Long life, 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. 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 are completed in one go, the number of cycles is greater than 500; high temperature resistance performance, discharge at 65 degrees The efficiency is 100%. In order to guard against the battery short-circuit phenomenon, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, its ability to short-circuit phenomenon has 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. The voltage is high. The voltage of 18650 lithium batteries is generally above 3.6 and 3.7, which is much higher than the 1.2V voltage of nickel-cadmium and nickel-hydrogen batteries. There is no memory effect, and there is no need to empty the remaining power before charging, which is convenient to use. 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: Why does the lithium battery increase? What are the reasons?