Molicel P26A Drone Application Weight v Power Trade Off in Pack Design - How to Pick the Right Balance
Explore the Molicel P26A cell for drones, optimising weight and power trade-offs for enhanced performance and endurance in UAV applications.
Value Propositions
Cylindrical 18650 form factor for compact design.
Nominal capacity of 9.0 Wh, ideal for drone applications.
Volumetric energy density of 508 Wh/l, supporting lightweight designs.
Maximum continuous discharge of 35.0 A, suitable for high-performance UAVs.
Gravimetric power density of 2,625 W/kg, ensuring efficient energy delivery.
About the Cell
The Molicel P26A is a cylindrical 18650 lithium-ion cell with a nominal capacity of 9.0 Wh and 2.5 Ah. It boasts a volumetric energy density of 508 Wh/l and a gravimetric energy density of 188 Wh/kg. With a maximum continuous discharge of 35.0 A and a maximum continuous charge of 6.0 A, this cell is designed for high-performance applications. Its volumetric power density of 7,111 W/l and gravimetric power density of 2,625 W/kg place it among the highest in the database, making it an excellent choice for drone battery design. The cell's standard charge current is 2.6 A, with a standard charge rate of 1.0 C, ensuring efficient charging capabilities. Overall, the Molicel P26A is engineered for optimal performance in UAV applications, balancing energy needs with weight considerations.
Application Challenges
In the realm of drones, achieving the right balance between weight and power is critical for effective UAV battery pack design. The Molicel P26A addresses this challenge by providing a high energy density solution that enables longer flight times without adding excessive weight. The need for lightweight drone battery packs is paramount, especially in applications requiring long endurance and high performance. The P26A's specifications allow for efficient energy use, which is essential in preventing overheating and ensuring safe operation. As UAVs are increasingly used in demanding environments, the ability to optimise battery performance while maintaining a lightweight design becomes a key factor in mission success.
Why this Cell
The Molicel P26A cell is particularly suited for drone applications due to its impressive specifications. With a maximum continuous discharge of 35.0 A, it is positioned in the top-quartile compared to the median of 30 A in the database, ensuring that it can handle high power demands during flight. Its volumetric energy density of 508 Wh/l is around the median, providing a solid balance of energy storage without compromising weight. The gravimetric power density of 2,625 W/kg is also among the highest, allowing for efficient energy delivery during critical flight phases. These metrics make the P26A an ideal choice for UAV battery optimisation, ensuring that operators can extend drone flight time while maintaining safety and performance.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the selection of the Molicel P26A for drone applications. By modelling load profiles and thermal behaviour, engineers can predict how the cell will perform under various conditions, such as high discharge rates and temperature fluctuations. This approach allows for accurate predictions of usable energy and voltage sag, which are vital for ensuring reliable drone operation. For instance, simulations can help identify the optimal charge and discharge cycles, preventing overheating and maximising battery life. Furthermore, by using cell-specific data, designers can confidently select the P26A for specific mission profiles, ensuring that the drone meets its performance requirements without unnecessary weight penalties.
