Lishen 2170LH Weight v power trade off in pack design - how to pick the right balance.
Explore the Lishen 2170LH cell for UAV applications, optimising weight and power for enhanced drone performance and endurance.
Value Propositions
Cylindrical 21700 form factor for efficient design.
Nominal capacity of 10.8 Wh and 3.0 Ah for reliable energy supply.
Top-quartile volumetric power density of 6049 W/l for high performance.
Gravimetric energy density of 152 Wh/kg, supporting lightweight designs.
Maximum continuous discharge of 45 A, ideal for demanding UAV applications.
About the Cell
The Lishen 2170LH cell features a cylindrical 21700 form factor, providing a nominal capacity of 10.8 Wh and 3.0 Ah. With a volumetric energy density of 403 Wh/l, it ranks around the median for energy density in the market. The gravimetric energy density is 152 Wh/kg, which is below the median, but still supports lightweight drone designs. The cell also boasts a volumetric power density of 6049 W/l, placing it in the top-quartile compared to the database median of 2029 W/l. Its gravimetric power density of 2281 W/kg is among the highest in the database, ensuring robust performance during high current draws. The standard charge current is 3.0 A, with a maximum continuous charge of 30.0 A, allowing for rapid charging capabilities. This cell is designed to meet the demanding needs of UAV applications, where weight and power efficiency are critical.
Application Challenges
In the context of EVTOL and the weight versus power trade-off in pack design, selecting the right battery is crucial. UAVs require batteries that not only provide sufficient energy for extended flight times but also maintain a lightweight profile to enhance overall performance. The challenge lies in balancing these two factors to optimise the drone's operational capabilities. High energy density is essential for long endurance missions, while lightweight designs are necessary to improve flight efficiency. The Lishen 2170LH cell addresses these challenges with its competitive energy and power densities, enabling UAV manufacturers to create efficient battery packs that do not compromise on performance.
Why this Cell
The Lishen 2170LH cell is particularly suited for UAV applications due to its impressive specifications. With a maximum continuous discharge of 45 A, it supports high power demands, making it ideal for applications requiring rapid acceleration or heavy lifting. The cell's volumetric power density of 6049 W/l is in the top-quartile, providing an advantage in scenarios where space is limited. Additionally, its gravimetric energy density of 152 Wh/kg, while below the median, still offers a viable option for lightweight drone battery packs. This balance of power and energy density is critical for optimising the weight versus power trade-off in UAV designs, ensuring that drones can perform effectively in various mission profiles.
How Model-Based Design Helps
Simulation and model-based design play a vital role in optimising battery selection for UAV applications. By modelling load profiles, thermal behaviour, and voltage response, engineers can predict how different cells will perform under realistic conditions. For instance, simulating the thermal rise and energy output of the Lishen 2170LH cell allows designers to understand its performance across various flight scenarios. This predictive capability helps in selecting the most suitable cell for specific missions, ensuring that the UAV can achieve its operational goals without risking battery failure. Furthermore, accurate modelling of energy consumption and thermal management can prevent overheating, thereby extending the life of the battery and improving overall mission reliability.
