Environmental Benefits of Used Batteries from E-Vehicles as Stationary Energy Storage

The batteries aged during the life of an electric vehicle can be reused for a variety of stationary applications. In combination with photovoltaics, higher private consumption rates can be reached at a module level. At the level of complete vehicle high-voltage batteries, DC quick charge stations with low power connections or load management (peak shaving) represent an example for industrial clients. In the megawatt area, used electric vehicle batteries can provided grid support or they can be used to stabilize the energy from wind parks. The environmental benefits of an electric vehicle face repeated criticism. Along with the use of CO₂-intensive, coal-based electricity for vehicle operation, the ecological rucksack of the battery is the primary focus. When the battery is reused at the end of the vehicle’s service life, the environmental benefits far exceed those of just regular recycling. The paper will show two already realized battery plants on a megawatt scale and report the experience in planning and construction. Both systems are used for grid control and can support a smart grid in the future.