Exploring Feasibility and Sustainability

Second-Life Batteries for Stationary Storage

This project explored the feasibility of using second-life batteries for stationary storage. We conducted technical, commercial, and financial studies to establish the basis for this. We developed a design tool to choose suitable battery cells or modules based on aging mechanisms.


Currently, second-life car batteries are preferably used for larger applications in the industrial sector (storage capacity in the MWh range) for grid stabilization, peak shaving, or as energy storage for the improved use of renewable energies.

Batteries are of crucial importance for the optimal integration of renewable energies into the power grid.

Electric vehicle batteries will be phased out after about 10 years, at which point they will no longer be able to meet the stringent requirements for continuous charge/discharge cycles and range, even if these batteries still have about 70-80% of their original capacity.

Project Key Topics

In this project, two important aspects of second-life batteries are considered:


  • Understanding aging beyond SOH = 70%
  • Implementing data-driven pre-qualification of battery modules