The ReHyB project will develop, construct, install, and operate a hybrid battery energy storage system comprised of two distinct battery (power dense and energy dense) and control systems. Such a system provides the ability to optimise power/energy performance by the combination of different technologies and thus simultaneously provide multiple grid services. The overall objective of the ReHyB project is to demonstrate the economic and technical feasibility of such a hybrid system. This will be achieved by (1) developing advanced battery control algorithms and battery management systems and by (2) hybrid system engineering by twinning of two distinct systems with two different types of lithium-ion battery chemistry. As energy dense batteries, second use batteries decommissioned form electric vehicles will be used, which are available at far more reasonable cost than new batteries. This reduces the system costs, and critical and raw material consumption. For power dense batteries, first use batteries will be used. The ReHyB storage is optimized, utilizing the advanced battery control algorithms, for simultaneously providing the following grid services:
- provision of services in weak distribution grids
- provision of load levelling for EV charging service stations
- provision of buffer capacities for renewable energy feed-in
- aid in the balancing the grid system
- intermittent blackout support
To conclude, the ReHyB project will extend the lifespan of batteries and reduce battery waste, optimise installation and operation costs of energy storage systems to below 0.05 €/kWh/cycle, provide new sustainable business opportunities for battery producers and energy companies, promote circular use of critical raw materials within batteries, provide recommendations for stationary storage related standards and regulations, and most importantly provide multiple services to grid operators facing issues related to weak grids and peak power issues.