Humanoid robots are marching forward in both capability and endurance, and the latest leap comes from Figure with its third-generation battery—F.03. This is not just another upgrade; it’s a fundamental shift in how battery systems are integrated and optimized within an advanced robotic body.
Figure’s F.03 battery does far more than power the robot; it becomes an integral part of the robot’s structure. By using the battery casing as a structural component, Figure has managed to double the capacity of its battery system and cut down excess weight at the same time. This clever integration makes the robot lighter, more durable, and more efficient.
Energy Density: The F.03 boasts a 2.3 kWh capacity, delivering up to five hours of peak performance runtime, a stunning 94% increase in energy density over previous generations.
Form Factor: Gone is the old, bulky external backpack. With innovative stamped steel and die-cast aluminum (which works as a heat pipe), the battery is now embedded into the torso. Structural adhesives tie it all together, improving both strength and thermal management.
Charging & Cooling: Fast-charging is available at 2 kW, keeping robots quickly ready for action, while active forced air cooling ensures thermal stability even under demanding conditions.
Smart Battery Management: A custom Battery Management System (BMS) maintains battery health, optimizes performance, and integrates a robust safety network of sensors, switches, and fuses to guard against overcharging, overheating, and short circuits.
Battery safety is non-negotiable, and Figure’s F.03 leads the industry:
Thermal Runaway Protection: The integrated design features a thermal insulative potting compound and a rapid heat distribution system, stopping thermal events from spreading between cells.
Flame Containment: With a flame arrestor vent and patented flame-containment tech, any potential incident is kept inside the pack.
Short Circuit Safeguards: The wirebond interconnect geometry acts as a fuse, cut off in the event of a short, adding an extra layer of protection.
Certification: The F.03 is set to be the first humanoid robot battery certified to UN38.3 and UL2271 safety standards for batteries, after comprehensive testing with a US Nationally Recognized Testing Laboratory.
Traditional robot battery updates often hit the wall of energy density vs. safety vs. bulkiness. Embedding the battery’s case directly into the robot’s skeleton flips the script:
Improved Weight Distribution: Better balance and agility for the robot, crucial in environments where robots need to move skillfully.
Reduced Complexity: Fewer standalone modules, quicker manufacturing, and easier maintenance.
Manufacturing Scalability: Figure’s design supports large-scale production—up to 12,000 robots per year—thanks to this integrated approach.
The superior energy density of the F.03 approaches benchmarks set by leading lithium-ion battery technologies, but Figure’s focus on structural integration and safety engineering stands out. This design philosophy may well set the template for next-generation mobile robotics—where every gram counts and every cell needs to be safe and smart.
Structural batteries are not just a power source—they’re redefining robot construction.
Emphasis on energy density, safety, and intelligent integration is raising the bar for the whole robotics sector.
Expect more robots with longer runtimes, safer operation, and robust, lightweight skeletons rolling off production lines soon.
As humanoid robots learn to walk, talk, and work alongside humans, advances like Figure’s F.03 will be at the heart of their evolution—keeping these machines moving, resilient, and ready for the real world
Editorial Team
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