The Role of Batteries in High Power Charging Infrastructure

DOI

10.2991/ahe.k.210202.020How to use a DOI?

Keywords

Electric vehicle, High power charging, Battery, Simulation analysis, Charging load, Charging stations, Electric grid

Abstract

The project “Cities in Charge” aims at deploying high-power DC and AC charging infrastructure for electric vehicles in twelve different regions in Germany. Foci of the project are the acceleration of the expansion of electro mobility in the target areas, the investigation of interaction of vehicle owners with the charging technology and the analysis of the influence on the distribution network. In this context, Fraunhofer IFAM investigates the possible contribution of battery storage systems for grid assisting charging. From more than 190 planned charging sites those were identified where the grid capacity is limited, and the use of batteries is an alternative to grid reinforcement. For the dimensioning of the battery, it is necessary either to know the charging load or to estimate the load that results from the expected utilization of the charging stations as realistically as possible. As construction of the charging infrastructure did not begin until 2019, real usage data were not available before December 2019. Therefore, Fraunhofer IFAM has developed a probabilistic simulation model to determine the utilization of charging stations. The simulation results are used in a second model assessing the load flows of the charging station. On the basis of these load flows, recommendations for the dimensioning of the batteries are derived. First results show that maximum load occurs less often than assumed and that use of batteries might be the preferable option if the desired availability of charging may be slightly lower than 100 %.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Karin Jahn
AU  - Carl-Friedrich Klinck
PY  - 2021
DA  - 2021/02/04
TI  - The Role of Batteries in High Power Charging Infrastructure
BT  - Proceedings of the 14th International Renewable Energy Storage Conference 2020 (IRES 2020)
PB  - Atlantis Press
SP  - 127
EP  - 134
SN  - 2589-4943
UR  - https://doi.org/10.2991/ahe.k.210202.020
DO  - 10.2991/ahe.k.210202.020
ID  - Jahn2021
ER  -