Storage

EnergyVille designs the interfaces between storage units and the system of which they form a part. These interfaces consist of hardware and software components which ensure the efficient, flexible, safe and cost-effective integration of storage units.

 

Electrical storage

Electrical energy storage is a mandatory element to ensure an increased and better integration of renewable energy sources. Therefore, EnergyVille provides the necessary infrastructure to develop new storage materials and battery technologies, improve existing solutions, extend lifetime, performance and operational safety, extend the storage device’s cycling capabilities and develop the next generation of battery systems.

In the EnergyVille battery lab new batteries based on new electrode materials and solid nanocomposite electrolytes are developed. These batteries have higher energy and power densities, are safer and can have a longer lifetime than current existing batteries.

In the battery testing labs, reliability analyses, testing, and characterization reporting for new battery materials and devices as well as existing batteries can be done. This allows customers to better understand and rely on their storage solutions and systems. Moreover, these results can be used to generate software models for integration in intelligent battery management systems to ease energy management, extend life cycle, performance, reliability and safety and to significantly improve the battery ROI.

Thermal storage

EnergyVille also conducts research on thermal energy storage technologies. With these technologies you can store excess heat or cold to be used when needed. In other words, the delivery of heat or cold is made independent of demand. This provides a solution to the daily mismatch between heat demand on a domestic level and supply from renewable sources (such as solar collectors or PV coupled heat pumps. ). A lot of different techniques can be used to store heat or cold, ranging from water tanks to the more exotic PCM (Phase Change Material) or thermochemical energy storage. The increased use of renewable energy sources and the increased self-consumption and self-production of energy are driving forces for the use of energy storage. Storage can also add operational flexibility to energy systems and helps drive waste heat recovery  in both industrial processes and buildings. Overall, it also improves the resource use efficiency of the energy system.

Thermal energy storage systems are especially used in buildings and industrial processes. In these applications about half of the energy used is in the form of thermal energy. Thermal energy storage systems can help balance energy demand and supply in different timeframes. For instance, a water buffer for sanitary hot water in a household stores heat for a few hours, while a large underground borehole storage stores up to a whole season.

Thermal storage can play an important role in both electrical and thermal grids. In order to couple thermal energy storage to an electrical grid, conversion systems like heat pumps or ORC’s are necessary connection systems. In thermal networks storage can play a balancing role between renewable heat production, connected conversion systems and heat consumers both on a short term (day-night) but also on a long term period (summer-winter). EnergyVille focuses on the development, demonstration and implementation of intelligent control of energy storage systems, on the state of charge, on storage integrated concepts and on compact thermal energy storage.

​Research topics

  • New battery materials and device development for improved energy storage
  • Battery analysis, test, characterisation
  • Battery management technologies
  • New technology for short term and long term storage
  • Thermal storage

 


Johan DriesenJohan Driesen, Professor Electrical Energy
"E
nergy storage is the missing link to massive integration of sustainable technologies, such as renewables based power conversion or plug-in vehicles."
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