Introduction to 21700 battery advantages

After switching from the 18650 type to the 21700 type, the capacity of a single-cell lithium-ion battery is increased by 35%. Take the 21700 battery produced by Tesla as an example. The battery capacity can reach 34.8Ah, which can be increased by 35%. The energy density of the 18650 battery system used in the early days was about 250Whkg. Later, the energy density of the 21700 battery system produced by it was about 300Whkg, and the energy density of the 2 battery system was increased by about 20%. Look at the data published by Tesla. The volumetric energy density of the 21700 battery is nearly 20% higher than that of the original 18650. The 21700 battery power lithium-ion battery system is priced at $170/Wh and the 18650 battery system is priced at $185/WhModel3. After using the 21700 battery, the cost of the 3 system is estimated to drop by about 9%. Analysis of battery price information published by Tesla. The cost of the battery system alone can be reduced by about 9%. The energy density of the monomer is higher, and the component of the 4 system is estimated to drop by about 10%. The total volume of 21700 is greater than 18650 as the monomer capacity increases. Therefore, the number of battery cells required for the same energy can be reduced by about 13 while reducing the difficulty of system management. At the same time, the number of metal structural parts and electrical accessories used in the battery pack will be reduced, which further reduces the weight of the battery. After Samsung SDI switched to a new set of 21700 batteries, it was found that the system reduced the weight by 10% compared to the current battery. The function of 21700 battery is greatly improved than 18650 in all aspects. In addition, the high reliability and stable functions of the 18650 battery are maintained. Compared with other battery types, 21700 is similar to the more mature 18650 battery in terms of battery raw material selection, manufacturing process and technical process. Therefore, most of the 18650 and 21700 production lines are compatible. Some companies have a safer method to make a fuss on the production line and move the production line closer to the compatibility of the 21700 and 18650. 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: Can lead-acid batteries be upgraded to lithium-ion batteries?