Ampace JP40 Weight v power trade off in pack design - how to pick the right balance.
Discover the Ampace JP40 cell for UAV battery design, optimising weight and power for enhanced drone performance and endurance.
Value Propositions
Cylindrical 21700 form factor for efficient space utilisation.
Nominal capacity of 14.8 Wh and 4.0 Ah for reliable energy supply.
Volumetric energy density of 595 Wh/l, top-quartile vs median 541 Wh/l.
Gravimetric power density of 3,217 W/kg, +328% vs database median of 750 W/kg.
Maximum continuous discharge of 60 A, top-quartile vs median 30 A.
About the Cell
The Ampace JP40 cell is designed in a cylindrical 21700 form factor, optimising space and weight for UAV applications. With a nominal capacity of 14.8 Wh and 4.0 Ah, it provides a reliable energy supply for various drone operations. Its volumetric energy density of 595 Wh/l places it in the top-quartile compared to the database median of 541 Wh/l, making it an excellent choice for applications requiring high energy density. Additionally, the gravimetric power density of 3,217 W/kg is significantly higher than the database median of 750 W/kg, ensuring that the JP40 can deliver power efficiently during demanding tasks. The maximum continuous discharge rate of 60 A further enhances its suitability for high-performance UAVs, allowing for brisk current draws without compromising safety or performance.
Application Challenges
In the context of EVTOL and the weight versus power trade-off in pack design, it is crucial to select battery cells that not only meet energy requirements but also maintain a lightweight profile. The challenge lies in balancing the need for high energy density with the constraints of weight, especially in UAV applications where every gram counts. The Ampace JP40 cell addresses these challenges effectively, providing a high volumetric energy density that supports long endurance missions while ensuring that the overall weight of the battery pack remains manageable. This balance is essential for optimising flight time and payload capacity, particularly in demanding environments where performance is critical.
Why this Cell
The Ampace JP40 cell is an ideal choice for UAV applications due to its impressive specifications. With a maximum continuous discharge rate of 60 A, it is positioned in the top-quartile compared to the median of 30 A in the database, allowing for robust performance during high-demand scenarios. The cell's volumetric energy density of 595 Wh/l, which is significantly higher than the median of 541 Wh/l, ensures that UAVs can achieve extended flight times without adding excessive weight. This makes the JP40 particularly suitable for applications that require a careful balance between energy capacity and weight, such as long endurance drone missions and heavy-lift operations.
How Model-Based Design Helps
Simulation and model-based design play a critical role in optimising the selection of battery cells for UAV applications. By modelling load profiles, thermal behaviour, and voltage response, engineers can predict how the Ampace JP40 cell will perform under various conditions. This approach allows for the identification of the most suitable cells based on specific mission profiles, ensuring that the selected battery can deliver the required thrust and energy throughout the flight envelope. For instance, simulating the thermal rise and potential voltage sag during high discharge scenarios helps in selecting cells that maintain performance without overheating, thus preventing failures and enhancing reliability. This predictive capability is essential for UAV operators who need to ensure mission readiness and efficiency.
