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Wireless Charging of Electric Vehicles

Wireless charging is considered by many to be the charging solution of the future, and it might have potential to give the electric car the edge that makes it the first choice for Swedish car buyers. During the WiCh project a total of twenty cars were equipped with wireless charging technology and the usage followed.

Challenge

WiCh (Wireless Charging of electric vehicles) is a Swedish research and demonstration project studying wireless charging of electric cars from a user’s perspective. The Swedish climate can be cold, rainy and dark so a charging solution that is quick and easy to use, and that works in all weather conditions, will be of great importance for a broad introduction of electric cars on the Swedish market. Wireless charging is considered by many to be the charging solution of the future, and it might have potential to give the electric car the edge that makes it the first choice for Swedish car buyers.

Solution

During the WiCh project, which started up in September 2012 and ended in December 2016, a total of twenty cars were equipped with wireless charging technology. The wireless charging technology used is a type of inductive charging called strongly coupled magnetic resonance. The charging equipment is made up by two different units, a sender placed in the ground at a parking space and a collector mounted underneath the car. The wireless solution paves the way for a fully automatic charging solution, in which the electric car is automatically charged as soon as it is parked above the sender.

In the WiCh project user experience is in focus. We believe that a wireless charging solution can be a great success for electric cars, but for this to happen it is important to find out what pros and cons users experience when handling the equipment and also to study how they interact with the new technology.

Effect

The cars utilized in the study were used in daily operations by employees of the city of Gothenburg and Stockholm. The wireless charging was hence evaluated in real life situations by ordinary people. The users were interviewed thoroughly during the project in order to collect their views of the wireless charging and whether they experience that their charging behavior has changed using the new technology. The results from the interviews were compared with quantitative data collected during the study. The main objective of this project was to answer the question if induction charging changes the charging behavior of the users and causes more frequent connection of electric vehicles to the grid.


Summary

Project name

WiCh

Status

Completed

Area

Electromobility

Region

Region Stockholm, Region Uppsala, Västra Götalandsregionen

RISE role in project

Coordinator

Project start

Duration

4.5 years

Total budget

11.5 MSEK

Partner

Vattenfall, Stockholms stad, Test Site Sweden, Swedish Radiation Safety Authority, Gatubolaget Göteborg

Funders

Swedish Energy Agency

The UN sustainable development goals

Climate action

Project members

Stefan Pettersson

Contact person

Stefan Pettersson

Research Manager

+46 10 228 40 02
stefan.pettersson@ri.se

Read more about Stefan