Comparison of storage solutions in car batteries

©istock

This project aims at evaluating the level of competition or complementarity between the use of active car batteries (vehicle-to-grid) and stationary batteries (second life battery) to help relieve the strain on the power system.

The multiplication of electric vehicles has the consequence of increasing the pressure on the electrical network. One way to relieve this pressure is the vehicle-to-grid (V2G) system, which allows vehicle batteries to be used to discharge or charge the grid when the electric vehicle is connected to the grid. The disadvantage is that this can potentially reduce battery life.

An alternative to V2G, which will also develop directly linked to the increase of the number of electric vehicles, is the use of second-life batteries (SLB). This term refers to automotive batteries which, after a certain period of use, due to the reduction in their storage capacity (80%), no longer offer sufficient autonomy for automotive use. However, these batteries can still be used to relieve the network in a stationary manner. They are then considered as second life batteries.

This project aims at evaluating the level of competition or complementarity of the two options V2G and SLB by 2050 at European level. It lasts six months and is conducted by the Risk Analytics and Optimisation Chair. It is sponsored by Groupe PSA.

Principal investigator Dirk Lauinger
Sponsor Groupe PSA
Period 2017-2018
Laboratory RAO