Scientists Confirm: Experimental Wireless EV Charger Matches Speed of Superfast Wired Plugs

SUMMARY

Scientists developed a new wireless charging system for EVs that's 10 times faster than existing options and just as efficient as superfast cable charging.

It uses a "polyphase electromagnetic coupling coil" with rotating magnetic fields to deliver 100 kW of power with 96% efficiency.

The goal is to integrate these chargers into roads and parking spots for automatic charging while parked. This innovation surpasses current options like Plugless Power (3.3-7.2 kW) and WiTricity (11 kW). This technology uses multiple alternating currents to create a more uniform magnetic field, allowing for higher power transfer in a smaller device. The compact size of the prototype makes it practical for real-world applications. This development signifies a major leap towards a future where charging EVs is as simple as parking.

Imagine a world where charging your electric car (EV) is as simple as pulling into a parking spot. No more fumbling with cables or hunting for charging stations. Scientists at the Oak Ridge National Laboratory (ORNL) in Tennessee have brought us closer to this reality with a groundbreaking wireless charging system that surpasses anything currently available.

Faster than Fast: Leaving Cables in the Dust

This new technology boasts a staggering 10 times faster charging speed compared to the most potent existing wireless chargers. It even rivals the efficiency of superfast cable charging, delivering 100 kilowatts (kW) of power with an impressive 96% efficiency.

Breaking Down the Tech: What Makes it So Powerful?

The secret lies in a "polyphase electromagnetic coupling coil" with rotating magnetic fields. This innovative system effectively transmits power wirelessly across a 5-inch air gap, enough to charge a Hyundai Kona EV (estimated range of 261 miles) in under 20 minutes, increasing its battery charge by 50%.

Beyond the Lab: A Glimpse into the Future of EV Charging

The ultimate goal? Integrating these wireless charging devices directly into roads and parking spots. Picture a future where EVs automatically charge while parked, eliminating the need for bulky cables and dedicated charging stations. This not only simplifies the charging process but also holds immense potential for expanding EV infrastructure.

Standing Out from the Crowd: How Does it Compare?

Current options for wireless EV charging pale in comparison. Existing systems like those from Plugless Power offer a measly 3.3 kW to 7.2 kW, while WiTricity's offering tops out at just 11 kW.

The Science Behind the Magic: Unveiling Polyphase Technology

Traditional wireless charging relies on a single-phase magnetic field generated by a large copper coil antenna. ORNL's system takes it a step further with "polyphase" technology. This utilizes multiple alternating currents (AC) and conductive materials, creating a rotating magnetic field with multiple phases.

The result? A more uniform field, allowing for significantly higher power transfer within a compact system. This not only boosts efficiency but also paves the way for smaller charging devices without compromising power.

A Small Footprint with Big Potential

ORNL researchers emphasize that the prototype's compact size makes it incredibly practical for real-world applications. This paves the way for a future where wireless charging seamlessly integrates into our existing infrastructure, revolutionizing the way we power our EVs.

This breakthrough technology from ORNL is a significant leap forward in wireless charging for EVs. With its exceptional speed, efficiency, and compact design, it promises a more convenient and future-proof way to power our electric vehicles. While there's still some development ahead, one thing is clear: the future of EV charging is looking bright, and potentially cable-free.