Analysis of 18650&21700 Lithium ion Battery
With the application of cylindrical 21700 single cell battery system in Tesla M-3 vehicle, the domestic power battery industry has become popular.
Let us analyze and compare the comprehensive performance of 18650 and 21700 from multi-dimension, from the technical path, product performance, industrialization trend, market potential and so on.
18650-21700 lithium ion battery product iteration - advantage upgrades
Core manufacturing efficiency improvement cost reduced by 9%;
High energy density: monomer capacity of the same material system increased by 35%-50%, energy density increased by 5-20%;
Mature manufacturing capacity: Continuous maturity of 18650 automatic production line production line can be general manufacturing quality consistency high;
PACK tends to mature: mature PACK design, can be suitable for a variety of applications. The flexible design of spatial structure and the continued use of mature PACK manufacturing capability.
18650-21700 lithium ion battery product iteration-disadvantage digestion:
PACK manufacturing difficulty reduced: the number of batteries reduced;
PACK cost: reduce the number of PACK accessories, improve PACK manufacturing efficiency, reduce the cost of PACK by 8%;
lightweight: reduce the number of PACK accessories, reduce the package weight by 10%;
management system difficulty: reduce the management system battery tube Quantity difficulty
|battery model||Parallel||Volumn(mm3)||Weight(kg)||Weight and Energy Ratio (wh/kg)||Volumn and Energy Ratio (wh/L)|
|84Ah battery module||18650||35||987896||1.9||159||306.1|
21700 battery increased battery capacity which is much necessary for new energy car application, which increased much mileage once charged full.