Storage Battery Concept

Challenge
The Battery Storage Concept project develops and tests an initial concept for a container-based energy storage system using batteries (Battery Energy Storage System – BESS).

This is achieved through the flexible integration of commercially available battery packs designed for electromobility and the second-life application of these batteries.

The integration is enabled by an energy-efficient power electronic system that converts and balances incoming and outgoing electrical energy stored in the battery system.

The solution is characterized by several features that collectively help establish a competitive market position:

• Storage capacity of up to approximately 1.5 MWh through the flexible integration of standard battery packs for electromobility, with individual capacities of up to approximately 100 kWh, housed in a robust container solution with a high safety level.
• Modular power electronic system with high energy efficiency and flexibility in energy conversion processes, featuring high-efficiency DC-DC converters as a central component.
• Customization options for specific customer needs in applications both before and after the electricity meter, delivering services that support grid stability and energy consumption balancing.
• The ability to build energy storage systems from standard electromobility battery packs that are widely available in large volumes at relatively attractive prices, independent of dominant market manufacturers.
• Paving the way for the second-life application of battery packs from electromobility, which will increasingly be available on the market.

Solution
The Battery Storage Concept is being developed and tested in an experimental setup to create a concept for a Minimum Viable Product (MVP) that delivers enhanced customer value in segments like electric vehicle charging and renewable energy production.

Specific project objectives include:

1. Services and architecture: Detailed analysis of energy storage system services and use cases that contribute to integrated energy systems, along with the overarching solution architecture.
2. Batteries: Analysis and evaluation of standard electromobility battery packs. Specification and design of a concept for integrating selected battery packs into solutions with variable capacity.
3. Power electronics: Specification and design of an energy-efficient, modular, and flexible power electronics system for precise and variable energy conversion, optimizing connections to the grid and consumption units.
4. Packaging and safety systems: Specification and design of a mechanical container solution for mounting battery packs and necessary auxiliary equipment, including safety systems.
5. Prototype: Development and testing of a prototype in an experimental setup, starting with a basic version and progressing to an integrated version.
6. Final concept design: Define and document the final tailored and cost-optimized design while addressing scaling barriers.

Impact
The Battery Storage Concept project develops a platform concept for subsequent further development and market maturation.

Based on the project’s experimental results and detailed use-case analyses, it will be possible to accurately quantify specific applications, such as truck and work vehicle charging, as well as renewable energy production.

The quantified services typically have a time horizon of up to 24 hours and a scale that depends on the energy storage capacity and the power electronics system.

Services provided by the Battery Storage solution include:

• Price arbitrage: Storing energy at low electricity prices and selling it when prices are high, capitalizing on significant price fluctuations.
• Load shifting: Moving energy consumption to periods of low demand, with shifts possible up to the storage system’s capacity.
• Peak shaving: Reducing costs and strain on the power grid.
• Demand response: Adjusting demand to match the grid’s needs and signals.
• Fee reduction: Shifting consumption to periods or locations with low fees.
• Frequency regulation, voltage support, and reserve power: Services supporting grid stability and reliability.
• Smoothing production from renewable energy systems: Managing renewable energy delivery to the grid, facilitating their integration.
• Grid deferral: Reducing or delaying the need for power grid infrastructure upgrades, including cable capacity.
• Microgrid and resilient decentralized grid infrastructure: Supporting independent local grid operation for energy security and resilience.

Partners

• Banke ApS
• Converdan A/S