In a decisive push toward scalable hydrogen mobility, BMW Group has unveiled a next-generation hydrogen storage concept for its iX5 fuel-cell SUV, anchored by a structurally optimized, composite-intensive flat tank system. This development moves beyond incremental engineering upgrades and positions hydrogen storage as a packaging and integration problem solved through advanced materials and geometric innovation.
The new BMW Hydrogen Flat Storage system stores around seven kilograms of hydrogen and takes less than five minutes to refuel. Its new arrangement and tank size offer a higher range of up to 750 kilometres and make exceptionally efficient use of available installation space. The system is fully compatible with the Gen6 high-voltage battery without compromising on space inside the cabin.
The 700-bar high-pressure hydrogen tanks additionally benefit from the mechanical protection provided by the vehicle structure, increasing safety even further.
Dr Joachim Post, Member of the Board of Management of BMW AG said: "Our new storage concept allows us to fit the hydrogen drive system into the new X5 precisely and in a way that saves space. Think of it as installation Tetris: every customer gets the drive system best suited to their needs and a true BMW X5 with no compromises."
The new flat tank system consists of seven high-pressure tanks made of carbon fibre-reinforced composite, which are connected in parallel and integrated into a robust metal frame. Instead of individual pressure vessels, multiple chambers are connected to form an enclosed unit controlled by a central main valve. This optimised storage concept increases range and has resulted in several patent applications being filed by the BMW Group.
The new BMW iX5 Hydrogen is equipped with latest-generation Gen3 fuel cell technology, and benefits from the Heart of Joy control software for the drivetrain and chassis, as well as BMW Dynamic Performance Control.
Thanks to its flexible architecture, the new BMW X5 can be fitted with a choice of five different powertrains — from battery-electric and plug-in hybrid to highly efficient conventional drives and hydrogen fuel cell technology. The flexible platform enhances manufacturing robustness and maximises scalability, paving the way for the BMW iX5 Hydrogen to be rolled out across the BMW Group's production network in 2028.
The HyPowerDrive project is funded by the Federal Ministry of Transport (BMV) as part of the IPCEI Hy2Move, with 191 million euros from the German Federal Government and 82 million in co-funding from the State of Bavaria.
Source: BMW Group
