Samsung 25S Safety and risk management - particularly around overheating and thermal runaway during flight.
Explore the Samsung 25S cell for EVTOL applications, optimising safety and performance against overheating and thermal runaway challenges.
Value Propositions
Cylindrical 18650 form factor for versatile integration.
Nominal capacity of 9.125 Wh and 2.45 Ah for reliable energy delivery.
Top-quartile volumetric energy density of 526 Wh/l, +1% vs median.
High gravimetric power density of 2680 W/kg, +125% vs median.
Maximum continuous discharge of 35 A, top-quartile vs median 30 A.
About the Cell
The Samsung 25S cell features a cylindrical 18650 form factor, providing a nominal capacity of 9.125 Wh and 2.45 Ah. Its volumetric energy density stands at 526 Wh/l, which is around the median of 522 Wh/l, while its gravimetric energy density is 194.149 Wh/kg, which is around the median of 209.39 Wh/kg. The cell boasts a volumetric power density of 7266 W/l, which is among the highest in the database, and a gravimetric power density of 2680.85 W/kg, which is +125% vs the median of 750 W/kg. This combination of metrics makes it an excellent choice for UAV applications, particularly in safety-critical environments.
Application Challenges
In EVTOL applications, safety and risk management are paramount, especially regarding overheating and thermal runaway during flight. The Samsung 25S cell's high energy density and robust discharge capabilities are crucial for maintaining performance under demanding conditions. With a maximum continuous discharge of 35 A, it can handle the rigorous demands of UAV operations, ensuring that drones can operate safely and efficiently even in extreme environments. The ability to manage thermal performance is vital, as overheating can lead to catastrophic failures, making the selection of the right battery cell critical.
Why this Cell
The Samsung 25S cell is ideal for EVTOL applications due to its impressive metrics. With a volumetric energy density of 526 Wh/l, it provides a compact energy solution that maximises flight time. Its gravimetric power density of 2680 W/kg is +125% vs the median, ensuring that it can deliver high power outputs for demanding UAV tasks. Additionally, the maximum continuous discharge of 35 A positions it in the top-quartile, allowing for reliable performance during critical flight phases. This cell is designed to meet the challenges of drone battery design, ensuring safety and efficiency.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the Samsung 25S cell in UAV applications. By modelling load profiles and thermal behaviour, engineers can predict how the cell will perform under various conditions, including high discharge rates and extreme temperatures. This predictive capability allows for the selection of the most suitable cell for specific missions, ensuring that thermal runaway risks are minimised. Furthermore, simulations can help in understanding voltage sag and usable energy, enabling better planning for mission profiles and payload optimisation. This approach reduces the reliance on trial-and-error testing, leading to more efficient and safer UAV operations.
