TerraE 25P4 EVTOL Maximise flight time - optimise the cell selection, duty cycle and flight speed to maximise flight time.
Discover how the TerraE 25P4 cell maximises flight time for EVTOL applications, overcoming challenges in drone battery design and optimisation.
Value Propositions
Cylindrical 18650 form factor with nominal capacity of 9.0 Wh and 2.5 Ah.
Volumetric energy density of 498 Wh/l, top-quartile vs median of 541.67 Wh/l.
Gravimetric energy density of 191 Wh/kg, around median of 210 Wh/kg.
Maximum continuous discharge of 30 A, among the highest in database.
Standard charge current of 2.5 A, around median of 2 A.
About the Cell
The TerraE 25P4 cell is designed in a cylindrical 18650 form factor, featuring a nominal capacity of 9.0 Wh and 2.5 Ah. It boasts a volumetric energy density of 498 Wh/l, which places it in the top-quartile compared to the database median of 541.67 Wh/l. The gravimetric energy density stands at 191 Wh/kg, which is around the median of 210 Wh/kg. With a maximum continuous discharge of 30 A, this cell is among the highest in the database, ensuring robust performance for demanding applications. The standard charge current of 2.5 A is also around the median, making it a reliable choice for various UAV designs.
Application Challenges
In EVTOL applications, maximising flight time is critical. The TerraE 25P4 cell addresses this challenge by optimising cell selection, duty cycle, and flight speed. Current and energy management are vital for ensuring that drones can operate efficiently over extended periods. The ability to maintain high discharge rates without overheating is essential for mission success, especially in demanding environments. The challenge lies in balancing weight, energy density, and thermal management to prevent overheating while extending flight time.
Why this Cell
The TerraE 25P4 cell is an excellent choice for EVTOL applications due to its impressive metrics. With a maximum continuous discharge of 30 A, it is among the highest in the database, ensuring that UAVs can handle demanding tasks without compromising performance. The volumetric energy density of 498 Wh/l, which is in the top-quartile, allows for longer flight times, making it ideal for applications requiring endurance. Additionally, the standard charge current of 2.5 A is around the median, providing a reliable charging option for various UAV designs. This combination of high energy density and robust discharge capabilities makes the TerraE 25P4 cell a top contender for drone battery optimisation.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in selecting the right battery cell for UAV applications. By modelling load profiles, thermal rise, voltage sag, and usable energy, engineers can predict how the TerraE 25P4 cell will perform under various conditions. This approach allows for the identification of optimal duty cycles and flight speeds, ensuring that the cell can deliver the required thrust and energy throughout the flight envelope. For instance, simulating different flight scenarios helps in understanding how the cell behaves under high discharge rates, which is essential for preventing overheating and ensuring mission success. This predictive capability reduces the risk of mid-air failures and enhances operator confidence in drone readiness.
