Molicel P50S 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 P50S, designed for fast charging in EVTOL applications, ensuring safety and efficiency without overheating or lithium plating.
Value Propositions
Cylindrical 21700 form factor for compact design.
Nominal capacity of 18.0 Wh and 5.0 Ah for reliable energy supply.
Top-quartile power density (+58% vs median W/kg) for brisk current draws.
Maximum continuous discharge of 100.0 A, ideal for high-demand applications.
Volumetric energy density of 703.4 Wh/l, among the highest in the database.
About the Cell
The Molicel P50S features a cylindrical 21700 form factor, providing a nominal capacity of 18.0 Wh and 5.0 Ah. Its volumetric energy density is 703.4 Wh/l, which is among the highest in the database, while the gravimetric energy density stands at 253.521 Wh/kg. The cell boasts a volumetric power density of 14,068 W/l, placing it in the top-quartile compared to the median of 2,029 W/l. With a maximum continuous discharge of 100.0 A, it is well-suited for demanding applications, ensuring that it can handle high current draws without compromising performance. The standard charge current is 5.0 A, allowing for efficient charging processes. Overall, the Molicel P50S is engineered for high performance, making it an excellent choice for UAV applications.
Application Challenges
In EVTOL applications, fast charging of batteries is critical to ensure operational efficiency. The challenge lies in charging the Molicel P50S quickly without overheating the cells or causing lithium plating, which can degrade battery performance and safety. High discharge rates are essential for UAVs, especially in demanding scenarios where rapid energy delivery is required. The ability to manage thermal conditions during charging is vital to prevent overheating, which can lead to battery failure. Therefore, optimising the charging process while maintaining safety is a core challenge for engineers in the UAV sector.
Why this Cell
The Molicel P50S is specifically designed to meet the challenges of fast charging in EVTOL applications. With a maximum continuous discharge rate of 100.0 A, it supports high energy demands, making it suitable for rapid deployment scenarios. Its volumetric energy density of 703.4 Wh/l ensures that it can store significant energy in a compact form, which is crucial for UAVs that require lightweight battery packs. Additionally, the cell's top-quartile power density (+58% vs median W/kg) allows for brisk current draws, ensuring that the UAV can perform optimally during critical missions. This combination of features makes the P50S an ideal choice for engineers focused on UAV battery optimisation.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the Molicel P50S in UAV applications. By modelling load profiles, engineers can predict how the cell will behave under various conditions, including thermal rise and voltage sag. This allows for accurate assessments of usable energy and helps in selecting the right cell for specific mission profiles. For instance, simulating the thermal behaviour during fast charging can identify potential overheating issues before they occur, enabling engineers to implement effective thermal management strategies. This predictive capability ensures that the Molicel P50S can be used safely and effectively in demanding UAV environments, ultimately enhancing mission success rates.
