The Volvo Car Group has completed its study of cordless charging for electric cars.
A partner in an advanced research project that has studied the possibilities of inductive charging for electric vehicles, the company said the results show that this technology for transferring energy via an electromagnetic field has a promising future.
“Inductive charging has great potential. Cordless technology is a comfortable and effective way to conveniently transfer energy. The study also indicates that it is safe,” says Lennart Stegland, Vice President, Electric Propulsion System at Volvo Car Group. “There is not yet any common standard for inductive charging. We will continue our research and evaluate the feasibility of the technology in our hybrid and electric car projects.”
Volvo explained inductive charging uses an electromagnetic field instead of a cord to transfer energy between two objects. An induction coil creates an alternating electromagnetic field from a charging base station. A second induction coil in the portable device picks up power from the electromagnetic field and converts it back into an electrical energy that charges the battery.
This technology is common in electrical home appliances such as electrical toothbrushes but is not yet commercially available to charge electric cars.
“With inductive charging, you simply position the car over a charging device and charging starts automatically. We believe that this is one of the factors that can increase the customer’s acceptance of electrified vehicles,” continued Lennart Stegland.
The completed research project, which included inductive charging for cars and buses, was initiated by Flanders’ Drive, the knowledge centre of the automotive industry in the Flanders region in Belgium. It featured a consortium of companies, including Volvo Car Group, Bombardier Transportation and the bus coachbuilder Van Hool.
Volvo said the project was partly funded by the Flemish government.
Volvo Cars supplied the car for the inductive charging project: a Volvo C30 Electric with a power output of 89 kilowatt (120 hp).
“The tests demonstrated that our Volvo C30 Electric can be fully charged without a power cable in approximately 2.5 hours. In parallel with this, we have also conducted research into slow and regular charging together with Inverto, which was also a partner in the project,” said Lennart Stegland.
The company continued by saying it has initiated strategic co-operation with Siemens in order to develop electrical drive technology, power electronics and charging technology as well as the integration of these systems into electric vehicles.