Extra-large autonomous underwater vehicles (XLAUVs) are reshaping subsea operations in the defence, security and the energy sectors. As missions run longer, deeper and become more complex, the demands on onboard power systems increases significantly.
At Lincad, we specialise in designing and manufacturing advanced battery systems that meet these challenges head-on, supporting reliable, long-endurance XLAUV operations in some of the harshest environments on earth.
Why XLAUV Battery Systems Are So Demanding
Unlike smaller AUVs, XLAUVs require far greater energy capacity for powering propulsion, sensors, communications and mission-specific payloads over extended periods. These vehicles often operate without people involved, sometimes for weeks at a time, making reliability and safety non-negotiable.
Battery systems for XLAUVs must deliver high energy density while remaining robust under extreme pressure, low temperatures and corrosive subsea conditions.
Space and weight constraints within the vehicle architecture also mean that batteries must be carefully integrated without compromising on performance or maintainability. As an experienced XLAUV battery supplier, we understand that there is no one-size-fits-all solution.
Modular Battery Design for Scalable Power
At Lincad, our approach centres on large modular battery systems that can be tailored precisely to the requirements of each XLAUV programme. Modular design allows power and voltage levels to be scaled to suit different mission profiles, whether that is long-range surveillance, subsea inspection or specialist defence applications.
Our modular architecture also improves redundancy and safety. Individual modules can be isolated and monitored, reducing risk and simplifying fault management. This approach is particularly valuable in autonomous underwater vehicles, where recovery for maintenance may be infrequent or difficult.
High-Voltage Capability and Power Management
As XLAUVs grow in size and capability, high-voltage battery systems are becoming increasingly vital. That’s why we have invested significantly in our production and testing facilities to support the manufacture of high-voltage, high-power battery systems suitable for extra-large unmanned platforms.
Beyond energy storage, we design complete power management solutions. These systems regulate power distribution across propulsion, navigation and payload subsystems, helping to maximise efficiency and extend mission duration.
Our in-house expertise ensures that battery performance is optimised at a system level, not just at cell level.
Designed for Subsea Environments
Operating underwater places unique stresses on battery systems. Pressure resistance, thermal management and long-term sealing are all critical considerations. Drawing on our experience supplying battery systems for UUVs, ROVs and autonomous inspection vehicles, we design XLAUV batteries specifically for subsea use.
Our bespoke subsea battery designs are engineered to maintain performance and safety throughout the vehicle’s operational life. Each system is rigorously tested to ensure it meets the environmental and operational demands of real-world deployment.
Supporting Defence, Security and Energy Applications
We primarily work in defence and security, supplying battery and charger systems for remotely operated and autonomous vehicles used in applications such as explosive ordnance disposal and subsea surveillance. At the same time, our technology supports underwater autonomous inspection vehicles used in the energy industry, where reliability and endurance are equally critical.
By combining deep technical expertise with an understanding of operational requirements, we have positioned ourselves at the forefront of battery engineering in the UK.
As XLAUV platforms continue to evolve, we remain focused on delivering safe, reliable and high-performance battery solutions that enable the next generation of subsea autonomy.
For more information on our power solutions, simply get in touch today.