TerraE 40P Drones Weight v power trade off in pack design - how to pick the right balance.
Explore the TerraE 40P cell for drones, optimising weight and power for enhanced performance and endurance in UAV applications.
Value Propositions
Cylindrical 21700 form factor for compact design.
Nominal capacity of 14.4 Wh and 4.0 Ah for reliable energy supply.
Top-quartile volumetric energy density of 566 Wh/l for efficient space usage.
Maximum continuous discharge of 45.0 A, ensuring high power output.
Gravimetric power density of 2,418 W/kg, ideal for dynamic UAV applications.
About the Cell
The TerraE 40P cell features a cylindrical 21700 form factor, providing a nominal capacity of 14.4 Wh and 4.0 Ah. With a volumetric energy density of 566 Wh/l, it stands out in the market, being top-quartile compared to the median of 542 Wh/l. The cell's gravimetric energy density is 215 Wh/kg, which is around the median, ensuring a balance between weight and energy. The maximum continuous discharge rate of 45.0 A places it in the top-quartile compared to the median of 30 A, making it suitable for high-demand applications. Additionally, the volumetric power density of 6,365 W/l is among the highest in the database, providing excellent performance for UAVs that require quick bursts of power.
Application Challenges
In the context of drones, the challenge of balancing weight and power in battery pack design is critical. Drones require lightweight components to maximise flight time while ensuring sufficient power for various tasks. The TerraE 40P cell addresses these challenges by offering a high energy density, which allows for longer flight durations without adding excessive weight. This is particularly important for applications such as long endurance missions, where every gram counts. The ability to optimise the weight versus power trade-off is essential for UAV battery pack design, ensuring that drones can perform effectively in diverse environments and mission profiles.
Why this Cell
The TerraE 40P cell is an excellent choice for drone applications due to its impressive specifications. With a maximum continuous discharge of 45.0 A, it is in the top-quartile compared to the median of 30 A, which is crucial for high-performance UAVs that require rapid power delivery. The cell's volumetric energy density of 566 Wh/l is also noteworthy, being top-quartile compared to the median of 542 Wh/l, allowing for efficient use of space in battery packs. This combination of high energy and power density makes the TerraE 40P ideal for applications where weight and performance are critical, such as in heavy lift drones or long endurance missions.
How Model-Based Design Helps
Simulation and model-based design play a vital role in optimising battery selection for drone applications. By simulating load profiles and thermal behaviour, engineers can predict how the TerraE 40P cell will perform under various conditions. This includes modelling voltage sag during high discharge scenarios and assessing thermal rise to prevent overheating. Such simulations enable the selection of the most suitable cells for specific missions, ensuring that drones can achieve their required performance without compromising safety. For instance, understanding the thermal dynamics of the TerraE 40P allows for better battery thermal management, which is crucial for maintaining efficiency during extended flights. Additionally, accurate predictions of state of charge (SoC) help in planning missions effectively, ensuring that drones can complete their tasks without mid-air failures.
