EVE Energy 40PL 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 EVE Energy 40PL cell, ideal for fast charging in EVTOL applications, ensuring safety and efficiency without overheating or degradation.
Value Propositions
Cylindrical 21700 form factor for compact design.
Nominal capacity of 14.4 Wh and 4.0 Ah for reliable performance.
Top-quartile volumetric power density of 10,108 W/l for rapid energy delivery.
Gravimetric energy density of 215 Wh/kg, ensuring lightweight solutions.
Maximum continuous discharge of 70 A, suitable for high-demand applications.
About the Cell
The EVE Energy 40PL cell features a cylindrical 21700 form factor, providing a nominal capacity of 14.4 Wh and 4.0 Ah. With a volumetric energy density of 578 Wh/l, it stands out in the market, being around the median compared to other cells. The gravimetric energy density is 215 Wh/kg, which is slightly above the median of 210 Wh/kg, making it a competitive choice for lightweight drone battery packs. The cell also boasts a volumetric power density of 10,108 W/l, placing it in the top-quartile compared to the median of 2,029 W/l, ensuring rapid energy delivery for demanding applications. Additionally, the maximum continuous discharge rate of 70 A is significantly higher than the median of 30 A, making it suitable for high-energy demands in UAV applications.
Application Challenges
In the EVTOL sector, fast charging of batteries is critical to ensure operational efficiency. The challenge lies in charging the battery quickly without overheating the cells or causing lithium plating, which can degrade the battery or lead to safety hazards. The EVE Energy 40PL cell addresses these concerns with its high maximum continuous charge rate of 8 A, which is above the median of 8 A in the database. This allows for efficient charging while maintaining thermal stability. The design must also consider the high energy density required for long endurance drone batteries, ensuring that the cells can deliver the necessary power without compromising safety.
Why this Cell
The EVE Energy 40PL cell is specifically designed for fast charging applications in EVTOL environments. With a maximum continuous charge rate of 8 A, it allows for rapid energy replenishment, which is essential for maintaining operational readiness. The cell's volumetric power density of 10,108 W/l is among the highest in the database, providing the necessary power for quick bursts of energy during flight. Additionally, its gravimetric energy density of 215 Wh/kg ensures that the battery remains lightweight, which is crucial for drone performance. This combination of high energy and power densities makes the 40PL an ideal choice for UAV battery optimization.
How Model-Based Design Helps
Simulation and model-based design play a vital role in optimising the performance of the EVE Energy 40PL cell for EVTOL applications. By modelling load profiles, thermal rise, and voltage sag, engineers can predict how the cell will behave under various conditions. This allows for the selection of the most suitable cells based on real-world scenarios, ensuring that the battery can deliver the required thrust and energy without overheating. For instance, simulations can help identify the optimal charging rates and conditions that prevent lithium plating, thereby enhancing the safety and longevity of the battery. This predictive capability is essential for ensuring reliable drone operations, especially in demanding environments.
