IISB researchers develop wireless charging technology for EVs

Researchers have developed an efficient and cost-effective wireless charging technology for electric vehicles.

Using electromagnetic induction, where electrical energy is transferred over the air between two objects through an electromagnetic field, it is now possible to charge an electric car with no cables.

The system is able to transmit 3 kW giving a total efficiency of 95 percent.

Since the car is parked closer to the induction source, the coils are kept smaller in diameter.

The best part of this wireless charging technology is that it eliminates the use of cable.

Besides, the coils are organized in such a way that charging takes place even if the vehicle is not parked exactly in position.

The charging column is of waist-high approx and made of plastic that can flip and bend with pressure.

Researchers at IISB, in collaboration with Energie Campus Nürnberg research platform, have developed this new system.

They designed coils that consist of several thin coils each insulated separately in order to keep exchange resistance to a minimum. The design of the wire coils determines the direction and strength of the magnetic field.

In the current approach, induction coils are mounted on the underside of the vehicle and charging stations are installed in the ground.

However, the technology encounters significant challenges also. The coils should be very powerful to accomplish the charging successfully, which are likely to escalate the cost of the EV charging.

There are other associated risks that need to be addressed. For example, metallic paper foils or cigarette packing may go under the system, get hot and burst into flame.

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