Molicel P50B 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 Molicel P50B cell for fast charging applications in EVTOLs, designed to prevent overheating and ensure safety during operation.
Value Propositions
Cylindrical 21700 form factor for compact design.
Nominal capacity of 18.0 Wh and 5.0 Ah for reliable performance.
Top-quartile power density (+58% vs median of 750 W/kg) for brisk current draws.
Maximum continuous discharge of 60.0 A for demanding applications.
Volumetric energy density of 703.4 Wh/l, among the highest in the database.
About the Cell
The Molicel P50B is a cylindrical 21700 lithium-ion cell with a nominal capacity of 18.0 Wh and 5.0 Ah. This cell features a volumetric energy density of 703.4 Wh/l, which is among the highest in the database, making it an excellent choice for applications requiring compact and efficient energy storage. Additionally, it boasts a gravimetric energy density of 257.143 Wh/kg, providing a lightweight solution for UAVs. The cell's volumetric power density is 8440.8 W/l, placing it in the top-quartile compared to the median of 2029.31 W/l in the database. With a maximum continuous discharge of 60.0 A, this cell is well-suited for high-demand applications, ensuring reliable performance under load. The standard charge current is 5.0 A, allowing for efficient charging without compromising safety.
Application Challenges
In the EVTOL sector, fast charging of batteries is critical to operational efficiency. The challenge lies in charging the Molicel P50B quickly without overheating the cells or causing lithium plating, which can degrade battery performance and pose safety risks. High discharge rates are essential for UAV applications, and the Molicel P50B's maximum continuous discharge of 60.0 A ensures that it meets the demands of rapid energy release during flight. Additionally, effective thermal management is crucial to prevent overheating, which can lead to battery failure. The cell's design must accommodate the high energy density required for long endurance flights while maintaining safety standards.
Why this Cell
The Molicel P50B cell is specifically designed for fast charging applications in EVTOLs, addressing the critical challenge of overheating during rapid charge cycles. With a maximum continuous charge rate of 25.0 A, this cell allows for efficient energy replenishment while minimising the risk of lithium plating. Its top-quartile power density of 3085.71 W/kg ensures that it can handle high current draws without compromising performance. The cell's volumetric energy density of 703.4 Wh/l is among the highest in the database, making it ideal for lightweight drone battery packs that require high energy output. This combination of features makes the Molicel P50B an optimal choice for UAV battery pack design, ensuring both performance and safety.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the Molicel P50B cell for fast charging applications. By modelling load profiles and thermal behaviour, engineers can predict how the cell will respond under various charging conditions. This allows for the identification of optimal charging strategies that minimise the risk of overheating while maximising efficiency. Additionally, simulations can help in understanding voltage sag and usable energy, ensuring that the cell delivers reliable performance throughout its operational envelope. By leveraging these insights, designers can confidently select the Molicel P50B for UAV applications, knowing it meets the rigorous demands of fast charging without compromising safety.
