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1. The single capacity of the new 21700 lithium-ion battery increased by 35%. Taking the 21700 lithium-ion battery processed by Tesla as an example, after switching from 18650 model to 21700 model, the single battery capacity of the battery can reach 3~4.8Ah, a significant increase of 35%.
2. The energy density of the new 21700 lithium-ion battery system increased by about 20%. According to the data disclosed by Tesla, the energy density of the 18650 lithium-ion battery system used in the early stage is about 250Wh/kg. Later, the energy density of the 21700 lithium-ion battery system processed by Tesla is about 300Wh/kg. The volume energy density of the 21700 lithium-ion battery is nearly 20% higher than the original 18650.
3. The cost of the system is expected to decrease by about 9%. According to the breakdown of battery price information disclosed by Tesla, the price of 21700 battery power lithium-ion battery system is $170/Wh, while the price of 18650 battery system is $185/Wh. After using 21700 lithium-ion battery on Model 3, the cost of battery system alone can be reduced by about 9%.
4. The weight of the system is expected to decrease by about 10%. The overall volume of the new 21700 lithium-ion battery is larger than that of the 18650 lithium-ion battery. With the increase of monomer capacity, the energy density of the monomer is higher, so the number of battery monomers required under the same energy can be reduced by about 1/3.
5. The energy density of the battery is increased by more than 20%, and the energy density of the 21700 battery is better than that of the 18650 battery. According to the information disclosed by Tesla at present, under the current conditions, the energy density of its 21700 lithium-ion battery system is about 300Wh/kg, which is about 20% higher than the 250Wh/kg of its original 18650 battery system.
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