KK Wind Solutions is leading a new technology project focusing on effective and sustainable energy storage.
KK Wind Solutions are teaming up with Aalborg University, PowerCon and Beyonder in a new EUDP funded development project called “Sense – renewable energy systems”. The aim is to create a battery solution based on lithium-ion capacitor technology, focusing on storage and recharging with high immediate power.
Such a solution can be utilized in systems that holds much energy and at the same time requires fast charging and discharging. Furthermore, the project aims at finding a solution to the rising challenge of grid stabilization, including grid frequency regulation.
The project is based on two physical demonstrators; a mega charger and a grid stabilizer.
One of the demonstrators included in the project is what we call a mega charger, which will be used for ferries. A short-distance ferry is not docked for a long time and needs to recharge very quickly which required a lot of power. That is what the project addresses with the mega charger.
"The technology used is similar to a supercapacitor, which has the property of being able to discharge and charge very quickly, but doesn't hold a lot of energy. Li-ion batteries however, can store a lot of energy. In this project, we merge the two technologies into a Lithium Capacitor (LiC) to get the best of both worlds: supercapacitor power and charging capabilities combined with Li-ion high energy storage”, says Bjørn Rannestad, PhD & Senior Specialist at KK Wind Solutions.
An additional benefit is, that Beyonder's battery technology is more sustainable and less harmful to the environment, as it is based on super active carbon extracted from Norwegian wood.
The other demonstrator is a grid stabilizer. Within this technology KK Wind Solutions is the specialist. The aim is to regulate unwanted power fluctuations in the grid. Frequency regulation is necessary as the more renewable energy that fills up the grid, the more regulation is needed to keep the grid in balance. At the moment this task is handled by power plants but the project partners suggest another way to tackle this challenge.
In relation to the frequency regulation and timespan Bjørn Rannestad adds: "Our technology can level out these imbalances. Not over a long time. Not over 30 or 60 minutes, but rather less than 15 minutes. To do this, you need high power. And that's what we're doing: high power over a short time rather than low power over a long time.
"Think of a bucket of water. Do you pour it all out at once or do you pour slowly with a thin stream. Our method is to empty the bucket all at once. Correspondingly, you can recharge the battery at once as soon as wind arrives. We aim to handle the short-term fluctuations in wind with a battery solution that can stabilize the power grid”, continues Bjørn Rannestad.
High efficiency and long lifetime
These technologies has several benefits. One is the high degree of efficiency as it is possible to use much of the stored energy which then leads to low waste percentage. As a result, these technologies are very competitive compared to competing variants. Moreover, this technology has a long lifetime compared to other types of batteries, as it has a high number in discharge- charge cycles.
Project in facts
- Project is titled "Sense – renewable energy systems"
- EUDP has allocated DKK 15.9 million (EUR 2.13 million) in the category "System integration"
- Total budget is for DKK 29 million
- Physical testing will involve two demonstrators: a mega charger and a grid stabilizer
- Project duration of three years, by which time it should be commercially viable
About our partners
- Aalborg University is amongst the best and most acknowledged international universities in the world, especially in the field of Energy Technology and Electrical Engineering. Aalborg University appears on the vast majority of ranking lists and is among the top two per cent of the world’s 17,000 universities.
- PowerCon is a Danish engineering company with a highly-specialized knowledge base within electrical power conversion and especially the development and production of full-scale electric power converters, Danish engineering firm.
- BEYONDER is a Norwegian energy technology company that has developed the next generation of sustainable Li-ion capacitors and supercapacitors for the heavy-duty industry sector.