TerraE 25P4 Fast charge of the batteries - how to charge the battery quickly without overheating the cells or causing lithium plating which could degrade the battery or cause it to catch fire.
Discover the TerraE 25P4 cell for fast charging UAVs, optimising performance while preventing overheating and ensuring safety in demanding applications.
Value Propositions
Cylindrical 18650 form factor for compact design.
Nominal capacity of 9.0 Wh and 2.5 Ah for reliable performance.
Top-quartile volumetric power density of 5,977 W/l for rapid energy delivery.
Gravimetric energy density of 191 Wh/kg, supporting lightweight UAV designs.
Maximum continuous discharge of 30 A, ideal for high-demand applications.
About the Cell
The TerraE 25P4 cell features a cylindrical 18650 form factor, making it suitable for various UAV applications. With a nominal capacity of 9.0 Wh and 2.5 Ah, it delivers reliable energy for extended flight times. The cell boasts a volumetric energy density of 498 Wh/l, which is around the median of the database, ensuring efficient use of space in battery packs. Additionally, the gravimetric energy density of 191 Wh/kg positions it well among lightweight drone battery packs, allowing for enhanced flight endurance. The volumetric power density of 5,977 W/l is in the top-quartile, providing rapid energy delivery for demanding applications. Furthermore, the maximum continuous discharge rate of 30 A supports high discharge rate UAV batteries, making it an excellent choice for applications requiring quick bursts of power.
Application Challenges
In the context of EVTOL and the challenge of fast charging, it is crucial to manage the thermal behaviour of the battery cells. Rapid charging can lead to overheating, which poses risks such as lithium plating and potential fire hazards. The TerraE 25P4 cell is designed to mitigate these risks, with a maximum continuous charge rate of 6.0 A (2.4 C), allowing for efficient charging without compromising safety. The challenge lies in balancing the need for quick charging with the thermal management of the battery to ensure safe operation during high-demand scenarios. This is particularly important in UAV applications where reliability and safety are paramount, especially in extreme environments.
Why this Cell
The TerraE 25P4 cell is optimally designed for fast charging applications in UAVs. With a maximum continuous charge rate of 6.0 A, it allows for quick energy replenishment while maintaining thermal stability. The cell's volumetric power density of 5,977 W/l is among the highest in the database, enabling rapid energy delivery essential for UAV performance. Additionally, its gravimetric energy density of 191 Wh/kg supports lightweight designs, crucial for extending drone flight time. This combination of high energy density and robust thermal management makes the TerraE 25P4 an ideal choice for applications requiring fast charging without overheating, ensuring safety and efficiency in demanding operational environments.
How Model-Based Design Helps
Simulation and model-based design play a critical role in optimising the performance of the TerraE 25P4 cell for UAV applications. By simulating load profiles and thermal behaviour, engineers can predict how the cell will perform under various conditions, including rapid charging scenarios. This approach allows for accurate modelling of heat generation and voltage response, enabling the selection of the most suitable cell for specific applications. For instance, by analysing the thermal rise during charging, engineers can ensure that the cell operates within safe limits, preventing overheating and degradation. This predictive capability is essential for mission-critical applications, where reliability and performance are paramount. Ultimately, simulation helps in making informed decisions that enhance the overall efficiency and safety of UAV operations.
