Samsung 20S Weight v power trade off in pack design - how to pick the right balance.
Explore the Samsung 20S cell for UAV applications, addressing weight vs power trade-offs to enhance drone performance and endurance.
Value Propositions
Cylindrical 18650 form factor for versatile applications.
Nominal capacity of 7.2 Wh and 2.0 Ah for efficient energy storage.
Top-quartile volumetric energy density at 415 Wh/l for compact designs.
Maximum continuous discharge of 30 A, ideal for high-demand UAVs.
Gravimetric power density of 2250 W/kg, supporting rapid energy delivery.
About the Cell
The Samsung 20S cell features a cylindrical 18650 form factor, providing a nominal capacity of 7.2 Wh and 2.0 Ah. Its volumetric energy density of 415 Wh/l places it in the top-quartile compared to the database median of 541.67 Wh/l, making it suitable for applications requiring compact energy solutions. The gravimetric energy density of 150 Wh/kg is around the median, ensuring a balance between weight and energy storage. Additionally, the cell boasts a maximum continuous discharge of 30 A, which is among the highest in the database, allowing for robust performance in demanding UAV applications. The volumetric power density of 6228 W/l is also impressive, exceeding the median by +62%, making it ideal for high-energy demands in drone operations. Overall, the Samsung 20S cell is designed for optimal performance in UAV applications, particularly where weight and power trade-offs are critical.
Application Challenges
In the context of EVTOL and the weight vs power trade-off in pack design, selecting the right battery cell is crucial. UAVs require batteries that not only provide sufficient energy for extended flight times but also maintain a lightweight profile to enhance overall efficiency. The challenge lies in balancing these two factors to ensure that the drone can perform optimally under various conditions. For instance, high energy density is essential for long endurance missions, while lightweight designs are necessary for improved manoeuvrability and payload capacity. The Samsung 20S cell, with its high volumetric energy density, addresses these challenges effectively, allowing designers to create UAV battery packs that meet stringent performance criteria without compromising on weight.
Why this Cell
The Samsung 20S cell is particularly suited for UAV applications due to its impressive specifications. With a maximum continuous discharge of 30 A, it supports high-demand operations, making it ideal for applications that require rapid energy delivery. This cell's volumetric energy density of 415 Wh/l is significantly advantageous, as it allows for compact battery designs that do not sacrifice performance. Compared to the database median of 541.67 Wh/l, this cell's performance is notable, ensuring that UAVs can achieve longer flight times without the burden of excessive weight. Furthermore, the gravimetric power density of 2250 W/kg positions it among the highest in the database, facilitating efficient energy use during critical flight phases. These attributes make the Samsung 20S an excellent choice for engineers focused on optimising UAV battery packs.
How Model-Based Design Helps
Simulation and model-based design play a vital role in selecting the right battery cells for UAV applications. By simulating load profiles, thermal behaviour, and voltage response, engineers can predict how the Samsung 20S cell will perform under various operational conditions. This approach allows for accurate modelling of energy consumption and thermal rise, ensuring that the selected cell can deliver the required thrust and energy throughout the flight envelope. For instance, by analysing the cell's performance in different temperature scenarios, designers can prevent issues such as overheating and ensure reliable operation in extreme environments. Additionally, simulation helps in optimising the battery pack design by identifying the best configurations that balance weight and power, ultimately leading to improved UAV mission endurance and efficiency.
