Tenpower 20SG 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 Tenpower 20SG cell for fast charging applications, optimising UAV performance while preventing overheating and degradation.
Value Propositions
Cylindrical 18650 form factor for versatile applications.
Nominal capacity of 7.4 Wh and 2.0 Ah for reliable energy delivery.
Top-quartile volumetric power density of 6,257 W/l for rapid energy transfer.
Gravimetric energy density of 172 Wh/kg, supporting lightweight designs.
Maximum continuous discharge of 30 A, ideal for high-demand UAV applications.
About the Cell
The Tenpower 20SG cell features a cylindrical 18650 form factor, providing a nominal capacity of 7.4 Wh and 2.0 Ah. With a volumetric energy density of 417 Wh/l, it ranks around the median for volumetric energy density in the market. Its gravimetric energy density of 172 Wh/kg is also around the median, making it suitable for lightweight drone battery packs. The cell's volumetric power density of 6,257 W/l is in the top-quartile, significantly enhancing its performance for fast charging applications. Additionally, the maximum continuous discharge rate of 30 A positions it among the highest in the database, ensuring it meets the demands of high energy density drone batteries.
Application Challenges
In the EVTOL sector, fast charging of batteries is critical to ensure operational efficiency. The challenge lies in charging the battery quickly without overheating the cells or causing lithium plating, which can degrade the battery or lead to safety hazards. The Tenpower 20SG cell's design addresses these concerns, with a maximum continuous charge rate of 6.0 A (3.0 C-rate), allowing for rapid charging while maintaining thermal stability. Effective battery thermal management is essential to prevent overheating, especially during high discharge scenarios. The ability to manage heat generation effectively is crucial for extending drone flight time and improving UAV mission endurance.
Why this Cell
The Tenpower 20SG cell is specifically designed for fast charging applications in UAVs. Its maximum continuous charge rate of 6.0 A (3.0 C-rate) allows for efficient energy transfer, making it suitable for applications requiring quick turnaround times. With a volumetric power density of 6,257 W/l, it is in the top-quartile compared to the database median of 2,029 W/l, ensuring that it can handle high current demands without overheating. This capability is vital for preventing drone battery overheating, a common pain point in UAV battery design. The cell's gravimetric energy density of 172 Wh/kg supports lightweight drone battery packs, further enhancing flight efficiency and endurance.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the Tenpower 20SG cell for fast charging applications. By modelling load profiles, thermal rise, and voltage sag, engineers can predict the cell's behaviour under various operating conditions. This predictive capability allows for the selection of the most suitable cells for specific UAV applications, ensuring that the chosen cell can deliver the required thrust and energy without risking overheating. For instance, simulating the thermal behaviour of the cell during rapid charging helps identify potential hotspots and informs the design of effective thermal management strategies. This approach not only enhances battery performance but also builds operator confidence in the reliability of their UAV systems.
