Analysis of the four major advantages of 21700 lithium battery

1. The single capacity of the battery has been increased by 35%. Take 21700 batteries processed by Tesla as an example. After switching from 18650 type to 21700 type, the capacity of a single battery can reach 3~4.8ah, which is significantly increased by 35%. 2. The energy density of the battery system has increased by approximately 20%. According to data published by Tesla, the energy density of the 18650 battery system used in the early stage is about 250Wh/kg, and the energy density of the 21700 battery system processed in the later stage is about 300Wh/kg. The volumetric energy density of the 21700 battery is nearly 20% higher than that of the original 18650 battery. 3. The cost of the system is expected to be reduced by about 9%. According to the analysis of battery price information published by Tesla, the price of the 21700 battery-powered lithium battery system is $170/Wh, and the price of the 18650 battery system is $185/Wh. Using the 21700 battery on model 3, the cost of the battery system alone can be reduced by about 9%. 4. The components of this system are estimated to be reduced by about 10%. The total capacity of 21700 is greater than 18650. As the capacity of the monomer increases, the energy density of the monomer increases. Therefore, the number of battery cells required under the same energy can be reduced by about 1/3. When SDI switched to a new 21,700 battery, it found that the weight of the system was 10% lighter than the current system. It insists on the high reliability and stability of the 18650 battery. The battery function of the 21700 is greatly improved than that of the 18650 in all aspects. In addition, compared with other types of batteries, 21,700 batteries are similar to the more complex 18650 batteries in terms of raw material selection, manufacturing process and process flow. Therefore, most of the 18650 and 21700 processing lines are compatible. The safer way for some companies is to do something on the processing line to make the 21700 and 18650 processing lines more compatible. The pursuit of high specific energy has become an irreversible trend in power lithium-ion batteries, and many battery companies have begun to turn their attention to the layout of 21,700 batteries. Some companies import processing lines from abroad but assemble them themselves, so they can switch from 18,650 to 21,700 with less capital. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages of all-solid-state lithium secondary batteries?