Reliance RS60 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 how the Reliance RS60 cell excels in fast charging for EVTOL applications, ensuring safety and efficiency without overheating.
Value Propositions
Cylindrical 21700 form factor for compact design.
Nominal capacity of 21.6 Wh and 6.0 Ah for reliable performance.
Top-quartile volumetric energy density of 858 Wh/l for efficient space usage.
Maximum continuous discharge of 50 A, top-quartile vs median 30 A.
Gravimetric power density of 2517 W/kg, +49% vs database median of 750 W/kg.
About the Cell
The Reliance RS60 cell features a cylindrical 21700 form factor, optimised for fast charging applications. With a nominal capacity of 21.6 Wh and 6.0 Ah, it provides a robust solution for UAVs and drones. Its volumetric energy density of 858 Wh/l places it in the top-quartile compared to the database median of 542 Wh/l, making it an excellent choice for applications requiring compact energy storage. Additionally, the cell boasts a maximum continuous discharge of 50 A, which is significantly higher than the median of 30 A, ensuring it can handle demanding power requirements. The gravimetric energy density of 302 Wh/kg also supports lightweight designs, crucial for drone applications where every gram counts. Overall, the RS60 is engineered for high performance and reliability in fast charge scenarios.
Application Challenges
In the EVTOL sector, the challenge of fast charging batteries without overheating is critical. Rapid charging can lead to thermal issues, including lithium plating, which can degrade battery performance and safety. The RS60's design addresses these concerns with its high maximum continuous charge rate of 15 A, which is well above the median of 8 A, allowing for efficient energy transfer while maintaining thermal stability. This capability is essential for UAVs that require quick turnaround times between flights, especially in commercial applications where downtime must be minimised. The ability to charge quickly without compromising safety is paramount, making the RS60 a suitable choice for modern drone designs.
Why this Cell
The Reliance RS60 cell is ideal for fast charging applications in EVTOLs due to its impressive specifications. With a maximum continuous charge rate of 15 A, it exceeds the median of 8 A, allowing for rapid energy replenishment without overheating. Its volumetric power density of 7149 W/l is among the highest in the database, providing the necessary power for demanding UAV operations. Furthermore, the gravimetric energy density of 302 Wh/kg ensures that the cell remains lightweight, which is crucial for extending flight times. These features make the RS60 a top choice for engineers focused on optimising UAV battery packs for performance and safety.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in selecting the right battery cells for UAV applications. By modelling load profiles and thermal behaviour, engineers can predict how the Reliance RS60 cell will perform under various conditions. This includes assessing heat generation during fast charging and ensuring that the cell operates within safe temperature limits. For instance, simulations can help identify the optimal charge rates that prevent overheating while maximising efficiency. Additionally, understanding voltage sag and usable energy through modelling allows for better predictions of battery performance in real-world scenarios. This data-driven approach reduces the risk of trial-and-error testing, leading to more reliable and efficient UAV designs.
