3.7v 18650 battery pack

　　The new 21700 has four distinct advantages:

　　(1) The single volume of the rechargeable battery is increased by 35%. Taking the 21700 rechargeable battery produced by Tesla as an example, from 18650 to 21700, the energy of a single battery can be increased by 34.8ah, an increase of 35%.

　　(2) The specific energy of the rechargeable battery system is about 20% higher. According to the data released by Tesla Motors, the 18650 rechargeable battery system is initially used for 250wh/kg energy, and the 21700 rechargeable battery system is used for 300wh/kg energy. The volume ratio of the 21700 rechargeable battery is nearly 20% higher than the original 18650.

　　(3) System software cost is estimated to be reduced by 9%. According to the statistical analysis of the battery price data released by Tesla, the market price of the lithium-ion battery system driven by the 21700 rechargeable battery is $170/wh, while the market price of the 18650 rechargeable battery system is $185/wh. Applying 21,700 rechargeable batteries on Model 3 can only reduce the cost of system software by about 9%.

　　(4) The net revaluation of system software is reduced by 10%. The total capacity is more than 21,700. With the increase of the single volume, the single energy ratio increases, and the total number of batteries required under the same kinetic energy can be reduced by about 1/3. The total number of metal components and electrical components selected for the battery pack can reduce the difficulty of management information systems. coefficient. After Samsung's sdi switched to the new 21700 rechargeable battery, it found that the system software was 10% lighter than the existing battery.

　　The 18650 rechargeable battery has high reliability and stability, and the performance of the 21700 battery is much higher than that of the 18650. In addition, compared with other battery models, the raw materials, processing technology and technical steps of the 21700 rechargeable battery are more advanced than the 18650 rechargeable battery level. Therefore, the 18650 and 21700 production lines are the best match, and some companies are more suitable for working under the production line, and the production line matches 21700 and 18650.