A UK engineering start-up has developed a structural battery technology that could significantly extend the range and payload capacity of heavy-lift drones, opening up new possibilities for emergency medical response, wildfire suppression, agriculture and defence applications.
The Structural Battery Company (The SB Co.) has unveiled Drone Spine, a high-voltage structural battery that forms part of a drone’s load-bearing frame while simultaneously providing power. By integrating energy storage into the aircraft’s structure, the company says the technology can increase range and payload capacity by up to 50% compared with conventional battery systems.
Unlike traditional unmanned aerial vehicles (UAVs), where batteries are housed as separate components that add weight and occupy valuable space, Drone Spine incorporates battery cells directly into the structural crossbeams of the aircraft. The approach reduces overall mass while freeing additional capacity for payloads or propulsion systems.
According to The SB Co., the technology has applications across several sectors, including emergency healthcare, agriculture, space and defence, as well as supporting efforts to combat increasingly frequent wildfires.
John Moffat, founder and CEO of The SB Co., said the technology could have a significant impact on emergency response.
Our Drone Spine innovation will save lives by enabling medical supplies to get to critically ill or injured patients in remote locations far quicker than ever before. It will dramatically improve firefighters’ ability to extinguish wildfires by enabling drones to carry more flame-retardant materials further and enabling them to make more trips in between battery recharges.
John Moffat, Founder and CEO, The SB Co.
The technology has already been demonstrated through a government-backed programme. In February last year, The SB Co. worked with ISS Aerospace and Marshall Aerospace on a project funded by the UK Government’s Defence and Security Accelerator (DASA). The partners integrated a 400V structural battery into the frame of a 600kg heavy-lift drone, reducing the aircraft’s structural mass by 45%. The demonstrator successfully carried a 220kg payload over a distance of more than 100km, demonstrating performance levels typically associated with crewed aircraft.
Beyond emergency services, the company believes Drone Spine could improve the productivity of agricultural drones used for precision spraying, seeding and crop monitoring by allowing them to operate for longer between charging cycles. The technology could also support next-generation satellite design by integrating energy storage into structural panels, reducing spacecraft mass and creating additional capacity for payloads or onboard systems. Defence represents another potential growth market, with heavier-lift, longer-range UAVs capable of transporting frontline supplies or humanitarian aid while expanding operational capability.
Drone Spine has been designed for quadcopter UAVs with a maximum take-off weight of up to 600kg and a payload-to-drone ratio of 4:1, positioning it for industrial and defence-grade applications rather than the consumer drone market.
The company says the integrated design also simplifies battery integration during aircraft development, potentially reducing engineering complexity and accelerating time to market for future heavy-lift UAV platforms.
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