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1. Battery capacity increased by 35%
Taking the GEB 21700 battery as an example, after switching from the 18650 model to the 21700 model, the capacity of a single battery can reach 3~4.8Ah, an increase of 35%.
2. The energy density of the battery system is increased by about 20%
According to the data disclosed by GEB, the energy density of the early 18650 battery system is about 250Wh/kg. Later, the energy density of the GEB 21700 battery system was around 300Wh/kg, and the volumetric energy density of the 21700 battery was nearly 20% higher than that of the original 18650 battery.
3. The system cost is expected to be reduced by about 9%
According to the battery price information disclosed by GEB, the power lithium battery system of the 21700 battery is priced at $170/Wh, while the 18650 battery system is priced at $185/Wh. Model 3 is equipped with 21700 batteries, and the cost of the battery system will be reduced by about 9%.
4. The weight of the system is expected to be reduced by about 10%
The overall volume of the 21700 is larger than the 18650. As the capacity of the single cell increases, the energy density of the single cell is higher, so the number of single cells required may be reduced by one-third for the same energy. The difficulty of system management is reduced, the number of metal structures and electrical accessories of the battery pack is also reduced, and the weight of the battery is further reduced. When Samsung SDI switched to a new 21700 battery, the system was found to be 10% lighter than the current battery.
Maintaining the high reliability and stable performance of the 18650 battery, the performance of the 21700 battery is greatly improved compared to the 18650 battery in all aspects. In addition, compared with other battery models, the 21700 is similar to the more mature 18650 battery in terms of raw material selection, manufacturing process and technical process. Therefore, most of the 18650 and 21700 production lines are compatible, and some companies have safer working methods on the production line, moving closer to the compatibility of the 21700 and 18650 production lines.
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URL:https://www.geb-battery.com/
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