BAK 45D Drones Safety and risk management - particularly around overheating and thermal runaway during flight.
Explore the BAK 45D cell for drones, designed for safety and risk management, ensuring optimal performance and preventing overheating during flight.
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 for efficient space use.
Maximum continuous discharge of 60 A, ensuring high performance under load.
Gravimetric power density of 3130 W/kg, ideal for dynamic UAV applications.
About the Cell
The BAK 45D cell features a cylindrical 21700 form factor, providing a nominal capacity of 15.84 Wh and 4.4 Ah. With a volumetric energy density of 619 Wh/l, it ranks in the top-quartile compared to the median of 541 Wh/l in the database. The gravimetric energy density is 229 Wh/kg, which is around the median of 210 Wh/kg. The cell also boasts a volumetric power density of 8447 W/l, which is among the highest in the database, and a gravimetric power density of 3130 W/kg, which is also in the top-quartile compared to the median of 750 W/kg. This combination of high energy and power densities makes the BAK 45D an excellent choice for drone applications, particularly where weight and space are critical factors.
Application Challenges
In the context of drones, safety and risk management are paramount, especially concerning overheating and thermal runaway during flight. Drones often operate in demanding environments where battery performance can be compromised. The BAK 45D cell's high energy density ensures that drones can achieve longer flight times, which is essential for missions that require extended operational periods. Additionally, the ability to manage thermal performance is crucial; the BAK 45D's design helps mitigate risks associated with overheating, ensuring that drones can operate safely even under high load conditions.
Why this Cell
The BAK 45D cell is specifically designed to meet the challenges of drone applications, particularly in safety and risk management. With a maximum continuous discharge of 60 A, it allows for high performance during demanding flight scenarios. The cell's volumetric energy density of 619 Wh/l is significantly above the median, ensuring that drones can carry more energy without increasing weight. This is critical for extending flight times and improving overall mission endurance. Furthermore, the gravimetric power density of 3130 W/kg positions it in the top-quartile, making it suitable for applications requiring rapid energy delivery, such as heavy-lift operations or high-speed maneuvers.
How Model-Based Design Helps
Simulation and model-based design play a crucial role in optimising the performance of the BAK 45D cell in drone applications. By simulating various load profiles, engineers can predict how the cell will behave under different conditions, including thermal rise and voltage sag. This predictive capability allows for the selection of the most suitable cells for specific missions, ensuring that drones can operate safely and efficiently. For instance, modelling can help identify the optimal charge and discharge rates, ensuring that the battery remains within safe operating limits while delivering the required power. This approach not only enhances safety but also improves overall battery performance, reducing the risk of thermal runaway and extending the lifespan of the battery.
