Molicel P28B 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 Molicel P28B for fast charging UAV batteries, optimising performance while preventing overheating and lithium plating issues. Learn more!
Value Propositions
Cylindrical 18650 form factor for versatile applications.
Nominal capacity of 10.08 Wh, ideal for drone battery design.
Top-quartile power density (+58% vs median 750 W/kg) for high discharge rates.
Gravimetric energy density of 210 Wh/kg, supporting lightweight UAV battery packs.
Maximum continuous discharge of 40 A, ensuring reliable performance.
About the Cell
The Molicel P28B features a cylindrical 18650 form factor, making it suitable for various applications, particularly in drone technology. With a nominal capacity of 10.08 Wh and a nominal capacity of 2.8 Ah, this cell is designed for high-performance use. It boasts a volumetric energy density of 569 Wh/l, which is significantly above the database median of 542 Wh/l, indicating its efficiency in space utilisation. The gravimetric energy density stands at 210 Wh/kg, aligning closely with the median of 210 Wh/kg, making it a competitive choice for lightweight drone battery packs. Furthermore, the cell achieves a volumetric power density of 8126 W/l, which is among the highest in the database, providing excellent performance for demanding applications. The gravimetric power density of 3000 W/kg also places it in the top quartile, ensuring it can handle high discharge rates effectively.
Application Challenges
In the context of EVTOL applications, fast charging of batteries presents unique challenges. The need to charge batteries quickly without overheating or causing lithium plating is critical. Overheating can lead to thermal runaway, while lithium plating can degrade battery performance and safety. The Molicel P28B addresses these challenges with its high maximum continuous discharge of 40 A, allowing for rapid energy transfer while maintaining thermal stability. This capability is essential for UAVs that require quick turnaround times between flights, especially in commercial and emergency scenarios. The ability to manage heat effectively during charging is vital for extending drone flight time and improving mission endurance.
Why this Cell
The Molicel P28B is an excellent choice for fast charging applications due to its impressive specifications. With a maximum continuous discharge of 40 A, it supports high energy demands without compromising safety. This is particularly important in EVTOL applications where rapid charging is necessary. The cell's volumetric energy density of 569 Wh/l is significantly higher than the database median, allowing for more energy storage in a compact form. Additionally, its gravimetric power density of 3000 W/kg ensures that it can deliver power efficiently during critical phases of flight. This combination of high energy and power densities makes the P28B a top contender for UAV battery optimisation, ensuring that operators can achieve longer flight times while maintaining safety and performance.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the Molicel P28B in real-world applications. By modelling load profiles, engineers can predict how the cell will behave under various charging conditions, including rapid charging scenarios. This allows for the identification of potential thermal issues before they arise, ensuring that the battery can be charged quickly without overheating. Additionally, simulations can help in understanding voltage sag and usable energy, which are critical for accurate drone battery state of charge (SoC) predictions. By using cell-specific data, designers can make informed decisions about battery thermal management, ultimately leading to safer and more efficient UAV operations. This predictive capability is essential for ensuring reliability in mission-critical applications, where every second counts.
