As part of the ELINA project, dynamic wireless power transfer (DWPT) technology for electric vehicles was being tested in public spaces for the first time in Germany. To this end, the electric shuttle bus at the Balingen Garden Show 2023 was charged inductively on selected routes and at bus stops. The technology was then tested further in regular bus operations. The latest news on the field trial can be found on the project website.
In electromobility, wired (conductive) charging is currently the primary charging concept in use. Charging must be carried out at a stationary charging station and therefore outside of driving times, which can be inconvenient for users due to waiting times. In addition, the range depends on the availability of charging points and battery capacity. Electric buses in public transport can be charged using conductive charging technologies, for example at bus stops or at the bus depot. The charging options at stops are influenced by the bus routes and frequency. In the case of overnight charging at the depot, the use of renewable energies is limited, as charging is not possible at times of high solar feed-in. In addition, when charging overnight, the range and consequently the battery size must be designed for daily mileage. This also has an impact on the vehicle’s ecological balance, as the battery size and the electricity charged during the operating phase influence the CO2 footprint. The project serves the overarching goal of testing DWPT technology in practice and bringing it to market maturity in Germany. The project focuses on the use of DWPT in public transport.
FfE is providing scientific support for the testing of DWPT technology in public transport carried out as part of the project. The specific objectives are:
• Assessing the national potential of DWPT technology in public transport
• Highlighting the technical, economic, and regulatory environment
• Investigating aspects of social acceptance of the technology
• Highlighting climate and system impacts in comparison to alternative charging technologies and control types
• Qualitative analysis of possible effects on distribution networks
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The research project is funded by the Federal Ministry for Economic Affairs and Energy (BMWE) (funding code: 01 MV22019B).
