Ampace JP40 Drones Weight v power trade off in pack design - how to pick the right balance.
Discover the Ampace JP40 cell for drones, optimising weight and power trade-offs for enhanced performance and endurance in UAV applications.
Value Propositions
Cylindrical 21700 form factor for efficient design.
Nominal capacity of 14.8 Wh and 4.0 Ah for reliable power.
Volumetric energy density of 595 Wh/l, top-quartile vs median.
Gravimetric power density of 3,217 W/kg, among the highest in database.
Maximum continuous discharge of 60 A, top-quartile vs median.
About the Cell
The Ampace JP40 cell features a cylindrical 21700 form factor, providing a nominal capacity of 14.8 Wh and 4.0 Ah. With a volumetric energy density of 595 Wh/l, it ranks in the top-quartile compared to the database median of 541.67 Wh/l, making it an excellent choice for applications requiring high energy density. Additionally, its gravimetric energy density stands at 214.49 Wh/kg, which is around the median of 210 Wh/kg. The cell also boasts impressive power densities, with a volumetric power density of 8,930 W/l, which is among the highest in the database, and a gravimetric power density of 3,217 W/kg, significantly exceeding the median of 750 W/kg. This combination of high energy and power densities makes the JP40 ideal for drone applications where weight and power trade-offs are critical.
Application Challenges
In the context of drones, the challenge of weight versus power trade-off in pack design is paramount. Drones require lightweight battery solutions that do not compromise on power output, especially for long endurance missions. The Ampace JP40 cell addresses this challenge effectively, providing a high energy density that allows for extended flight times while maintaining a manageable weight. The need for lightweight drone battery packs is crucial for applications such as VTOL (Vertical Take-Off and Landing) and heavy-lift operations, where every gram counts. Moreover, ensuring that the battery can handle high discharge rates without overheating is essential for safe and reliable operation in various environments.
Why this Cell
The Ampace JP40 cell is specifically designed to meet the demands of drone applications, particularly in optimising weight versus power trade-offs. With a maximum continuous discharge rate of 60 A, it is in the top-quartile compared to the median of 30 A in the database, ensuring that it can deliver the necessary power for demanding flight profiles. Its volumetric energy density of 595 Wh/l not only supports longer flight times but also allows for compact battery designs, which is critical in UAV battery pack design. The combination of high gravimetric power density at 3,217 W/kg and a maximum continuous charge rate of 8 A positions the JP40 as an excellent choice for custom UAV battery packs, enabling efficient energy management and performance optimisation.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in selecting the right battery cells for drone applications like the Ampace JP40. By modelling load profiles, thermal behaviour, and voltage response, engineers can accurately predict how a cell will perform under various conditions. For instance, simulating the thermal rise during high discharge scenarios helps in identifying cells that can maintain performance without overheating. This predictive capability allows for informed decisions in battery thermal management for drones, ensuring that the selected cell can handle the operational demands without risk of failure. Additionally, modelling usable energy and voltage sag during flight enables precise calculations of flight endurance, which is vital for mission planning and execution.
