Lishen 2170LA 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 Lishen 2170LA cell for fast charging in EVTOL applications, overcoming overheating and lithium plating challenges for optimal performance.
Value Propositions
Cylindrical 21700 form factor for efficient design.
Nominal capacity of 14.4 Wh and 4.0 Ah for reliable energy delivery.
Top-quartile power density (+58% vs median 2,029 W/l) for rapid energy transfer.
Gravimetric energy density of 215 Wh/kg, ensuring lightweight solutions.
Maximum continuous discharge of 45 A, supporting high-performance UAV applications.
About the Cell
The Lishen 2170LA 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 566 Wh/l, it ranks among the highest in the database, surpassing the median of 542 Wh/l by +4%. The gravimetric energy density stands at 215 Wh/kg, which is around the median of 210 Wh/kg. The cell also boasts a volumetric power density of 6,370 W/l, placing it in the top-quartile compared to the median of 2,029 W/l, with a significant +58% increase. Additionally, the gravimetric power density of 2,418 W/kg is also in the top-quartile, exceeding the median of 750 W/kg by +222%. This combination of high energy and power densities makes the Lishen 2170LA an ideal choice for demanding applications such as EVTOL and drone technology.
Application Challenges
In the EVTOL sector, fast charging of batteries is critical to ensure operational efficiency and safety. The challenge lies in charging the Lishen 2170LA cell quickly without overheating or causing lithium plating, which can degrade performance and lead to safety hazards. The high maximum continuous discharge rate of 45 A allows for rapid energy delivery, but careful thermal management is essential to prevent overheating. The ability to maintain performance under high discharge rates is vital for applications requiring quick turnaround times, such as drone deliveries and emergency services. Therefore, effective battery thermal management strategies must be implemented to ensure the longevity and reliability of the battery in demanding environments.
Why this Cell
The Lishen 2170LA cell is specifically designed for fast charging applications, with a maximum continuous discharge rate of 45 A, which is significantly higher than the median of 30 A in the database. This capability allows for efficient energy transfer during rapid charging cycles, making it suitable for UAV applications that require quick recharges. The cell's volumetric energy density of 566 Wh/l is also among the highest, ensuring that it can store substantial energy without compromising on weight. This is crucial for UAVs where every gram counts, and the lightweight design of the Lishen 2170LA cell supports extended flight times while maintaining high performance. Furthermore, the cell's thermal management capabilities are enhanced by its design, allowing it to handle the heat generated during fast charging effectively.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the Lishen 2170LA cell for fast charging applications. By modelling load profiles and thermal behaviour, engineers can predict how the cell will respond under various charging conditions. This includes assessing voltage sag, heat generation, and usable energy across different scenarios. For instance, simulations can help identify the optimal charging rates that prevent overheating while maximising efficiency. By using cell-specific data, designers can ensure that the battery operates within safe thermal limits, thereby reducing the risk of lithium plating and enhancing overall safety. This predictive capability allows for informed decision-making in the design of UAV battery packs, ensuring that the selected cells meet the rigorous demands of fast charging without compromising performance or safety.
