SFEERS: Key Elements of the Hydrogen Battery

Carbon fiber capsules combined with space-proven microsystem technology lead to a safe and cost-efficient hydrogen solution for a clean tomorrow.

The Perfection of Geometry

The sphere as a pressure vessel

  • SFEERS are a gas storage of the size of a tennis ball, and consist of an outer layer of carbon fiber and a polymer-liner inner layer.
  • The unique shape, size, and functionality of the SFEERS enable a higher energy density than conventional pressure vessels and less material usage, which makes our high-pressure storage cells considerably lighter than conventional high-pressure vessels.
  • The fragmentation of the energy into thousands of small units leads to a multiplication of the safety functions,
    making our solution safer than electric batteries and conventional hydrogen storage systems.
  • The micromechanical valve system that controls the flow of highly pressurized gas is integrated in the liner of the

Rocket Science Brought Back to Earth

The micromechanical valve system

  • The micromechanical valve system of each SFEER includes all the mechanical structures needed for safe, easy, and efficient handling without the need for external control signals. All valves and regulators only respond to the pressures inside and outside of the SFEER.
  • The valve system contains a filter system, separate branches for inlet and outlet flow, check valves, a safety disc, and a pressure regulator.
  • The pressure regulator is used to ensure that the respective application is supplied with the required hydrogen pressure and mass flow at all times.
  • When no hydrogen is required, the pressure regulator is sealed to prevent outflow. A check valve closing at normal
    air-pressure levels enables the easy and safe handling of SFEERS.
  • The intelligent microvalve system is based on satellite technology and has been optimized for use on earth.

The Hydrogen Battery

  • The hydrogen battery consists of multiple SFEERS inside a low-pressure case.
  • SFEERS store renewable energy in the form of compressed gaseous hydrogen. They are independent of each other but act as a unit and fulfill the same functions
    as a conventional pressure vessel with a significantly lower weight and lower costs.
  • The release of hydrogen depends on the pressure in the low-pressure case and is controlled by the intelligent microvalve system (IMVS) in every SFEER.
  • The light weight and the flexibility of the SFEERS enable a highly modular system, so that the hydrogen battery can be customized to the application.
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A number of patents testifies to our innovative strength and secures our leading position in the field of hydrogen storage and microvalve technology

Battery Cell Comparison

Performance and Cost Forecast

SFEERS will offer the highest energy density at the lowest cost and will outperform state-of-the-art and next-generation battery cells.

SFEERS technology will radically transform how hydrogen is currently handled and accelerate the transition to renewables.