EVE Energy 50PL Weight v power trade off in pack design - how to pick the right balance.
Explore the EVE Energy 50PL cell for UAV applications, optimising weight and power for enhanced drone performance and endurance.
Value Propositions
Cylindrical 21700 form factor for efficient integration.
Nominal capacity of 18.0 Wh and 5.0 Ah for reliable energy delivery.
Top-quartile volumetric energy density of 724 Wh/l for compact designs.
Maximum continuous discharge of 80 A, ensuring high performance under load.
Gravimetric power density of 4000 W/kg, ideal for dynamic UAV applications.
About the Cell
The EVE Energy 50PL cell features a cylindrical 21700 form factor, providing a nominal capacity of 18.0 Wh and 5.0 Ah. With a volumetric energy density of 724 Wh/l, it ranks in the top-quartile compared to the database median of 542 Wh/l, making it suitable for applications requiring compact energy solutions. The gravimetric energy density is 250 Wh/kg, which is around the median, ensuring a balanced weight-to-energy ratio. Additionally, the cell boasts a volumetric power density of 11580 W/l, which is among the highest in the database, and a gravimetric power density of 4000 W/kg, enabling it to deliver high power outputs efficiently. The standard charge current is 2.5 A, with a maximum continuous charge of 10.0 A, allowing for quick recharging. The standard discharge current is 1.0 A, with a maximum continuous discharge of 80.0 A, making it suitable for high-demand UAV applications.
Application Challenges
In the context of EVTOL and the weight versus power trade-off in pack design, selecting the right battery cell is crucial. UAVs require batteries that not only provide sufficient energy for extended flight times but also maintain a lightweight profile to enhance overall performance. The EVE Energy 50PL cell addresses these challenges by offering a high energy density, which is essential for long endurance drone batteries. The ability to optimise weight while ensuring adequate power output is vital for applications such as heavy lift drones and fixed-wing UAV solutions. Additionally, managing thermal performance is critical to prevent overheating during high discharge scenarios, ensuring safe operation in extreme environments.
Why this Cell
The EVE Energy 50PL cell is an excellent choice for UAV applications due to its impressive specifications. With a maximum continuous discharge rate of 80 A, it is positioned in the top-quartile compared to the database median of 30 A, making it suitable for high-demand scenarios. The cell's volumetric energy density of 724 Wh/l is significantly higher than the median, allowing for compact battery designs that do not compromise on performance. This is particularly important in the context of UAV battery optimisation, where every gram counts. The gravimetric power density of 4000 W/kg ensures that the cell can deliver the necessary power for dynamic flight profiles, making it ideal for applications requiring rapid acceleration and high thrust.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising battery selection for UAV applications. By modelling load profiles and thermal behaviour, engineers can predict how the EVE Energy 50PL cell will perform under various conditions. This includes assessing voltage sag during high discharge rates and estimating usable energy across different flight scenarios. For instance, simulating the thermal rise during extended operations helps in selecting cells that can withstand high currents without overheating. This predictive capability allows for informed decision-making, ensuring that the chosen cell not only meets the energy requirements but also maintains safety and reliability during missions. By avoiding costly trial-and-error testing, simulation enhances the efficiency of the design process.
