LG Chem HG2 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.
Explore the LG Chem HG2 cell for fast charging applications in EVTOLs, addressing overheating and lithium plating challenges effectively.
Value Propositions
Cylindrical 18650 form factor for compact designs.
Nominal capacity of 10.8 Wh and 3.0 Ah for reliable performance.
Top-quartile power density (+25% vs median of 750 W/kg) for brisk current draws.
Volumetric energy density of 616 Wh/l, significantly above the median of 542 Wh/l.
Maximum continuous discharge of 20 A, ensuring robust performance under load.
About the Cell
The LG Chem HG2 cell features a cylindrical 18650 form factor, making it ideal for compact battery designs in UAVs. With a nominal capacity of 10.8 Wh and 3.0 Ah, it provides reliable energy storage for various applications. The cell boasts a volumetric energy density of 616 Wh/l, which is significantly above the database median of 542 Wh/l, allowing for more energy storage in a smaller volume. Additionally, its gravimetric energy density of 225 Wh/kg positions it well within the competitive landscape, offering a balance of weight and energy efficiency. The cell's power density is also impressive, with a volumetric power density of 4107 W/l, placing it in the top-quartile compared to the median of 2029 W/l. This makes the HG2 suitable for applications requiring high discharge rates, such as fast charging in EVTOLs.
Application Challenges
In the context of EVTOLs, fast charging presents unique challenges. The need to charge batteries quickly without overheating or causing lithium plating is critical. Overheating can lead to thermal runaway, while lithium plating can degrade battery performance and safety. The LG Chem HG2 cell, with its high maximum continuous discharge of 20 A, is designed to handle the demands of rapid charging while maintaining thermal stability. The cell's robust thermal management capabilities are essential for ensuring safe operation during high-current charging scenarios. Additionally, the high energy density allows for extended flight times, addressing the need for long endurance in UAV applications.
Why this Cell
The LG Chem HG2 cell is an excellent choice for fast charging applications in EVTOLs due to its impressive specifications. With a maximum continuous discharge rate of 20 A, it is well-suited for high-demand scenarios, ensuring that UAVs can charge quickly without compromising safety. The cell's volumetric energy density of 616 Wh/l is significantly above the median, allowing for more energy storage in a compact form. This is crucial for UAVs that require lightweight battery packs to enhance flight efficiency. Furthermore, the cell's top-quartile power density of 4107 W/l ensures that it can deliver the necessary power for rapid acceleration and sustained flight, making it a reliable option for drone battery design.
How Model-Based Design Helps
Simulation and model-based design play a vital role in optimising battery performance for UAV applications. By modelling load profiles, thermal behaviour, and voltage response, engineers can predict how the LG Chem HG2 cell will perform under various conditions. This approach allows for the identification of potential overheating issues and the evaluation of thermal management strategies before physical testing. For instance, simulating the thermal rise during fast charging can help in selecting the right cooling mechanisms to prevent lithium plating. Additionally, understanding the voltage sag and usable energy across different discharge rates enables engineers to make informed decisions about battery pack design, ensuring that UAVs can achieve their mission profiles effectively.
