Molicel P45B 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 P45B cell for fast charging applications in EVTOL. Achieve high energy density without overheating risks. Learn more now.
Value Propositions
Cylindrical 21700 form factor for compact design.
Nominal capacity of 16.2 Wh, ideal for UAV applications.
Maximum continuous discharge of 45.0 A, top-quartile vs median 30 A.
Volumetric energy density of 633 Wh/l, +16% vs database median of 541.67 Wh/l.
Gravimetric power density of 2314.29 W/kg, among the highest in database.
About the Cell
The Molicel P45B is a cylindrical 21700 cell with a nominal capacity of 16.2 Wh (4.5 Ah). It features a volumetric energy density of 633 Wh/l and a gravimetric energy density of 231.43 Wh/kg. The cell's maximum continuous discharge rate is 45.0 A, which places it in the top-quartile compared to the median of 30 A in the database. Additionally, its volumetric power density of 6330.6 W/l is significantly above the median of 2029.31 W/l, making it an excellent choice for high-performance applications. The cell's design prioritises both energy efficiency and thermal management, crucial for fast charging scenarios.
Application Challenges
In EVTOL applications, fast charging of batteries is critical to ensure operational efficiency. The challenge lies in charging the Molicel P45B quickly without overheating the cells or causing lithium plating, which can degrade battery performance and safety. High discharge rates are essential for rapid energy delivery, but they must be managed to prevent thermal runaway. The Molicel P45B's maximum continuous discharge rate of 45.0 A allows for effective energy transfer, while its thermal management capabilities help mitigate overheating risks. This balance is vital for maintaining drone performance and safety during rapid charging cycles.
Why this Cell
The Molicel P45B cell is specifically designed for fast charging applications in EVTOL environments. With a maximum continuous charge rate of 13.5 A (3.0 C), it supports rapid energy replenishment while maintaining safety. Its volumetric energy density of 633 Wh/l is +16% compared to the median of 541.67 Wh/l, providing ample energy storage without compromising weight. The cell's gravimetric power density of 2314.29 W/kg is among the highest in the database, ensuring that it can handle high discharge rates effectively. This combination of features makes the P45B an ideal choice for UAV battery optimization, allowing for lightweight and efficient battery packs that meet the demands of modern drone applications.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the Molicel P45B in fast charging applications. By modelling load profiles and thermal behaviour, engineers can predict how the cell will respond under various charging conditions. This includes assessing heat generation, voltage response, and usable energy across different scenarios. For instance, simulations can identify the optimal charging rates that prevent overheating while maximising energy transfer. This predictive capability allows for informed decision-making in cell selection, ensuring that the Molicel P45B meets the rigorous demands of EVTOL applications without compromising safety or performance.
