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F.03 Battery System

1 post · Jul 2025

What this trail covers

The F.03 battery represents a significant advancement in humanoid robot energy systems, featuring a 2.3 kWh capacity for 5 hours of runtime, improved energy density, 2 kW fast charging with active cooling, a custom Battery Management System (BMS), and a multi-layer safety architecture targeting both UN & UL certification. It incorporates multi-function components, structural battery design, active cooling integrated into die casting, and an anti-propagation/flame containment system. The battery is now in mass production at BotQ with a cost reduction of 78% over F.02.

All Figure AI trails
  1. F.03 Battery DevelopmentThis post details the engineering advancements in the F.03 battery, focusing on its novel design strategies: multi-function components, structural battery design using high-strength materials, integrated active cooling, and a multi-layer anti-propagation/flame containment system. It also highlights the rigorous multi-layer safety architecture, including BMS protections, cell-level safety, interconnect protection, and pack-level containment. The post emphasizes the certification to UN38.3 and UL2271 standards, including Figure's collaboration in developing the UL standard for humanoid robots. Finally, it describes the transition to high-volume production at BotQ using toled processes and integrated manufacturing systems (PLM, ERP, WMS, MES).