The concept is based on:

  1. combining modular high-energy batteries and high-power batteries,
  2. novel converter concepts and
  3. production technology solutions derived from the automotive sector.

A modular approach will reduce component costs (battery, convertor) so that unique ship designs can profit from economies of scale by using standardised low-cost modular components. In SEABAT existing commercial battery cells will be used, the concept will be suitable for future battery generations and high-power components that may have higher power densities or are based on different chemistries.

The converter concepts studied in the project include:

  • A converter integrated into a battery module, transforming the module into a controllable voltage source. The integration requires balancing compactness and heat load versus efficiency and cost,
    Switching individual cells to achieve e.g. a near-constant DC voltage. The switch needs to be developed for robustness and efficiency, together with the proper control.
  • A partial power converter, where existing concepts need to be upscaled to MWs, developed for bidirectional flow (charging and discharging) and integrated with (over)voltage protection circuits.

Read more on the project approach.