Magnum-H2: A Modular Solid-State Hydrogen Storage Platform with Active Thermo-Mechanical Control for Heavy-Duty Transport

This work presents the Magnum-H2 architecture, a modular solid-state hydrogen storage platform designed for heavy-duty transport applications. The system is based on magnesium hydride (MgH2) and introduces an active thermo-mechanical control concept (“Termo-Spring”) that compensates volumetric expansion of the storage material through constant mechanical preload, while enabling high-rate hydrogen desorption via controlled heat delivery. A cartridge-based deployment model (“Cartridge King”) is proposed to decouple hydrogen storage from high-pressure infrastructure, replacing conventional 700-bar tanks with standardized, swappable thermal modules. A Level-1 analytical model confirms the physical feasibility of the architecture, demonstrating hydrogen desorption at 3.3 g/s, a required thermal input of approximately 124 kW at system level, internal thermal diffusion times on the order of 0.23 seconds, and a staged cold-start strategy enabling operational readiness in under 5 minutes at −20 °C. This publication establishes publicly registered prior art for the Magnum-H2 architecture while intentionally excluding detailed implementation aspects such as material compositions, internal geometries, thermal-mechanical interfaces, control algorithms, and manufacturing processes.