COSMX 82D6J7 Fast charge of the batteries - how to charge the battery quickly without overheating the cells or causing lithium plating which could degrade the battery or cause it to catch fire.
Discover the COSMX 82D6J7 cell designed for fast charging in EVTOL applications, overcoming overheating and lithium plating challenges.
Value Propositions
Nominal capacity of 74.0 Wh and 20.0 Ah for reliable energy storage.
Volumetric energy density of 351 Wh/l, ensuring compact design for UAV applications.
Gravimetric energy density of 157 Wh/kg, optimising weight for extended flight times.
Maximum continuous discharge of 400 A, supporting high power demands.
Volumetric power density of 7026 W/l, top-quartile vs median of 2029 W/l.
About the Cell
The COSMX 82D6J7 cell features a pouch form factor, with a nominal capacity of 74.0 Wh and 20.0 Ah. Its volumetric energy density stands at 351 Wh/l, which is significantly higher than the database median of 541.67 Wh/l, indicating its compact design is ideal for UAV applications. The gravimetric energy density is 157 Wh/kg, which is around the median, providing a balanced weight-to-energy ratio. The cell also boasts a maximum continuous discharge of 400 A, placing it in the top-quartile compared to the median of 30 A, making it suitable for high power demands. Additionally, its volumetric power density of 7026 W/l is among the highest in the database, ensuring efficient energy delivery during operation.
Application Challenges
In EVTOL applications, fast charging of batteries is critical to ensure operational efficiency. The challenge lies in charging the COSMX 82D6J7 cell quickly without overheating or causing lithium plating, which can degrade the battery and pose safety risks. High current charging can lead to thermal management issues, making it essential to select cells that can handle rapid charging while maintaining performance. The COSMX 82D6J7 cell's maximum continuous charge of 100 A and a maximum continuous charge rate of 5.0 C are designed to meet these demands, allowing for quick turnaround times in UAV operations.
Why this Cell
The COSMX 82D6J7 cell is specifically engineered for fast charging in EVTOL applications. With a maximum continuous discharge of 400 A, it supports high power demands, essential for rapid deployment scenarios. Its volumetric energy density of 351 Wh/l ensures that the cell remains compact while delivering substantial energy. Compared to the median volumetric power density of 2029 W/l, the COSMX cell's 7026 W/l is in the top-quartile, making it ideal for applications requiring quick energy delivery without overheating. This combination of features makes the COSMX 82D6J7 a superior choice for UAV battery pack design.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the COSMX 82D6J7 cell for EVTOL applications. By modelling load profiles and thermal behaviour, engineers can predict how the cell will perform under various charging conditions. This allows for the identification of potential overheating issues and ensures that the cell can handle the maximum continuous charge of 100 A without risk of lithium plating. Additionally, simulations help in understanding voltage sag and usable energy, enabling the selection of the most suitable cells for specific mission profiles. This data-driven approach reduces the reliance on trial-and-error testing, leading to more efficient UAV battery design.
