50 kWh lithium battery for energy storage in Aarhus Denmark

Denmark has emerged as a significant player in battery storage technology, playing a vital role in the global transition to renewable energy. As demand for electric vehicles and clean energy solutions grows, the importance of battery storage in the Danish market continues to rise.

Expanding into battery storage, Better Energy is installing its first 10 MW/12 MWh battery energy storage system design at the Hoby solar park in Denmark. Expected to be operational by the end of 2024, this system will enhance grid stability and support a renewable energy-based power system.

Denmark also lacks specific protocols for Lithium-ion battery fire and explosion testing, e.g., UL 9540A, which is a benchmark test recommended in many other countries. Danish guidelines may furthermore provide more clarification on when and which suppression systems should be installed, depending on BESS design parameters.

Aside from presenting a viable opportunity for energy storage or balancing electrical grids, BESS present significant fire and explosion risks, due to employment of Lithium-ion batteries (LIB), which are susceptible to thermal runaway (TR).

Under the DK1 guideline, facilities storing Lithium-ion batteries must ensure direct access from public roads and maintain unobstructed fire routes, including access roads and clear areas for emergency vehicle maneuvers. It is imperative that these routes remain free from obstructions, such as snow and ice.

Overall, there are very few guidelines on the use of repurposed and refurbished batteries in BESS. The Netherlands and USA are the only countries that discuss the topic. Germany underlines the need of risk assessment due to a higher failure probability. Guidance on use of repurposed and refurbished batteries should be provided.