BAK 45D Safety and risk management - particularly around overheating and thermal runaway during flight.
Explore the BAK 45D cell for EVTOL applications, optimising safety and performance while managing overheating and thermal runaway risks.
Value Propositions
Cylindrical 21700 form factor for compact design.
Nominal capacity of 15.84 Wh and 4.4 Ah for reliable energy supply.
Top-quartile volumetric energy density of 619 Wh/l, +14% vs median.
Maximum continuous discharge of 60 A, ensuring high performance.
Gravimetric power density of 3130 W/kg, supporting dynamic UAV operations.
About the Cell
The BAK 45D cell features a cylindrical 21700 form factor, optimising space and weight for UAV applications. With a nominal capacity of 15.84 Wh (4.4 Ah), it provides a reliable energy source for various drone missions. The cell boasts a volumetric energy density of 619 Wh/l, placing it in the top-quartile compared to the median of 541 Wh/l in the database. This high energy density is crucial for long endurance drone batteries, allowing for extended flight times without increasing weight. Additionally, the cell's gravimetric energy density of 229.57 Wh/kg ensures that it remains lightweight while delivering substantial power. The maximum continuous discharge rate of 60 A positions it among the highest in the database, enabling high performance during demanding flight scenarios. Furthermore, the volumetric power density of 8447 W/l is exceptional, providing the necessary power for rapid acceleration and high thrust applications.
Application Challenges
In the EVTOL sector, safety and risk management are paramount, particularly concerning overheating and thermal runaway during flight. The BAK 45D cell addresses these challenges effectively. With its high maximum continuous discharge rate of 60 A, it can handle the rigorous demands of UAV operations without compromising safety. The ability to maintain performance under high loads is essential for preventing overheating, which can lead to catastrophic failures. Additionally, the cell's impressive energy density ensures that drones can operate efficiently in extreme environments, where battery performance is critical. As UAVs are increasingly used in various applications, including emergency services and industrial inspections, the need for reliable battery systems that can withstand harsh conditions becomes ever more important. The BAK 45D cell's specifications make it a suitable choice for these demanding applications, ensuring that drones can complete their missions safely and effectively.
Why this Cell
The BAK 45D cell is specifically designed to meet the challenges of EVTOL applications, particularly in safety and risk management. Its maximum continuous discharge rate of 60 A ensures that it can deliver the necessary power for high-demand operations, which is crucial for preventing overheating and ensuring safe operation. The cell's volumetric energy density of 619 Wh/l places it in the top-quartile compared to the median of 541 Wh/l, allowing for longer flight times without increasing weight. This is particularly important for UAV battery optimisation, where every gram counts. Furthermore, the gravimetric power density of 3130 W/kg supports dynamic flight profiles, enabling drones to perform effectively in various scenarios. The combination of these metrics makes the BAK 45D an ideal choice for custom UAV battery packs, ensuring that operators can rely on their drones for extended missions without compromising safety.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the BAK 45D cell for EVTOL applications. By modelling load profiles, thermal rise, voltage sag, and usable energy, engineers can accurately predict how the cell will perform under various conditions. This allows for informed decision-making when selecting cells for UAVs, ensuring that the chosen battery can handle the specific demands of each mission. For instance, simulations can identify potential overheating issues before they occur, enabling designers to implement effective thermal management strategies. Additionally, by analysing the cell's performance across different flight profiles, engineers can optimise battery weight versus flight time, ensuring that drones achieve maximum efficiency. This approach not only enhances the reliability of UAV operations but also reduces the risk of mid-air failures, making it a vital tool in the design and development of safe and effective drone battery systems.
