Stabl Energy is developing a technology that makes battery storage more efficient, safer, and more cost-effective. To do this, the Munich-based company divides high-voltage battery packs into many smaller modules. Using the specially developed technology, these modules are then dynamically interconnected. This concept is intended to protect against failures, improve safety, and save energy. With the Stabl technology, both new and discarded batteries, such as those from electric cars, can be used. This gives old batteries a second use as stationary storage.
Technical hurdles of second-life batteries
Recycling these second-life batteries presents several technical hurdles: conventional storage systems are a chain of many battery modules. This static chain of battery storage systems, like any chain, has the property that the weakest link determines performance. Specifically, the storage system with the lowest energy content determines the available capacity. However, used vehicle batteries vary in condition after many years, due to varying loads, for example, but also production tolerances. Therefore, the conventional approach of stationary storage systems is not suitable for second-life applications.
Stabl Energy has developed a solution to make battery storage more efficient and safer and enable the integration of discarded batteries from electric vehicles in large quantities. According to the company, the Munich-based startup's technology can easily handle the sometimes very different residual capacities of the vehicle's battery modules, allowing the batteries to be used for longer.
Product outside the laboratory
Now, the Munich-based energy startup has integrated its technology into a storage system for the first time. The storage system consists of 24 used battery modules from old KIA Soul EV and has an energy content of 72 kWh. Together with project partners Encore, a corporate startup from DB Bahnbau Gruppe GmbH, Inno2grid, and Dellcon, the project was realized at the Euref Campus and has been open to the public ever since.
"We are pleased to now be able to demonstrate our product in a real environment outside of the laboratory. With the certifications for our product now complete, we are launching series production and allowing as many companies as possible to participate in the energy transition,"
says Co-Founder and Co-CEO Nam Truong.
Stabl Energy and its partners are planning further projects for various customers over the coming years. In addition to rail-related applications such as buffering charging stations at train stations, projects with commercial and industrial companies are also being planned to optimize their electricity supply or provide emergency power supplies.
“In this way, we extend the life cycles of car batteries and want to involve as many companies as possible in the energy transition,”
Truong explains further.
