Murata VTC5A Weight v power trade off in pack design - how to pick the right balance.
Explore the Murata VTC5A cell for UAV applications, balancing weight and power for optimal performance in drone battery design.
Value Propositions
Cylindrical 18650 form factor for compact design.
Nominal capacity of 9.36 Wh and 2.6 Ah for reliable energy supply.
Top-quartile volumetric energy density of 543 Wh/l for efficient space usage.
Maximum continuous discharge of 35 A, ideal for high-demand applications.
Gravimetric power density of 2,681 W/kg, supporting rapid energy delivery.
About the Cell
The Murata VTC5A is a cylindrical 18650 lithium-ion cell with a nominal capacity of 9.36 Wh (2.6 Ah). It boasts a volumetric energy density of 543 Wh/l, positioning it in the top-quartile compared to the database median of 542 Wh/l. The cell's gravimetric energy density is 199 Wh/kg, which is around the median of 210 Wh/kg. With a volumetric power density of 7,309 W/l, it is among the highest in the database, exceeding the median of 2,029 W/l. The maximum continuous discharge rate of 35 A (13.5 C) is also impressive, being significantly above the median of 30 A. This combination of features makes the VTC5A suitable for demanding UAV applications where performance and efficiency are critical.
Application Challenges
In the context of EVTOL applications, the weight versus power trade-off is crucial. UAVs require batteries that not only provide sufficient energy for extended flight times but also maintain a lightweight profile to enhance overall performance. The Murata VTC5A addresses these challenges effectively. Its high energy density allows for longer missions without adding excessive weight, which is vital for maintaining flight efficiency. Additionally, the ability to deliver high discharge rates ensures that the UAV can perform demanding tasks without risking battery failure. This balance is essential for applications such as heavy-lift drones and long-endurance missions, where every gram counts.
Why this Cell
The Murata VTC5A is an excellent choice for UAV applications due to its impressive specifications. With a volumetric energy density of 543 Wh/l, it allows for compact battery designs that do not compromise on energy supply. The maximum continuous discharge rate of 35 A positions it in the top tier of performance, ensuring that it can handle the high demands of UAV operations. Furthermore, its gravimetric power density of 2,681 W/kg supports rapid energy delivery, which is critical for maintaining drone powertrain efficiency. This cell's capabilities make it ideal for applications where weight and power must be optimally balanced.
How Model-Based Design Helps
Simulation and model-based design play a pivotal role in optimising battery selection for UAV applications. By simulating load profiles and thermal behaviour, engineers can predict how the Murata VTC5A will perform under various conditions. This includes assessing voltage sag, heat generation, and usable energy throughout the flight envelope. For instance, modelling can reveal how the cell behaves during high discharge scenarios, ensuring that the selected battery can meet the required thrust without overheating. Such predictive capabilities enable engineers to make informed decisions, reducing the risk of mid-air failures and enhancing mission reliability. Ultimately, this approach leads to more efficient UAV designs that maximise performance while minimising risks.
