Record for wireless charging of electric vehicles: 270 kW without precision parking

Revolution in electric vehicle charging 270 kW wireless and hassle free

US engineers have developed a revolutionary 270 kW wireless electric vehicle charging system that can charge Porsche Taycan by 50% in 10 minutes. The system is compact, efficient and easy to use.

Wireless charging

Record power

Scientists at Oak Ridge National Laboratory (ORNL) have achieved impressive results in the field of wireless charging of electric vehicles. They managed to transfer 270 kW of power to the Porsche Taycan without the use of cables. This achievement follows shortly after the successful demonstration of Hyundai Kona's 100 kW wireless charging.

Comparison with wired systems

Modern high-power DC charging stations can deliver up to 350 kW, but most electric vehicles, including the Taycan and Hyundai Ioniq 5, can only accept 230-250 kW. At this power, the battery charges from 10% to 80% in about 20 minutes. ORNL's wireless system promises to charge the battery to 50% in just 10 minutes.

Technology and Benefits

At the heart of ORNL's design is a magnetic resonance transmitter and receiver on the underside of a vehicle. The key feature is the multiphase windings - lightweight electromagnetic coils that create a rotating magnetic field. This eliminates current ripple and ensures constant energy transfer across the air gap.

According to Omer Onar, head of the research team, the system has 8-10 times higher power density compared to single-phase counterparts with an efficiency of more than 95%.

Compactness and versatility

The system is characterized by compactness of both the transmitting and receiving parts. The powerful 270 kW receiver fits into the space Porsche has provided for a potential 11 kW wireless charger in future versions of the Taycan. The diameter of the receiver electromagnetic coils does not exceed 50 cm.

ORNL claims that their design is the lightest wireless charger in the world with a rating of 7.5 kW/kg, which is significantly superior to the system Brusa (1.9 kW/kg with a power of only 22 kW).

Advantages over wired systems

Wireless charging eliminates the need for bulky cables and plugs, which is especially important for older people and people disabled. The absence of cables also eliminates the risk of damage or theft. The system is easier to maintain compared to cable analogues, which require regular maintenance and replacement of components.

ORNL's development does not require precise parking of the car - efficient charging is possible even with an offset of up to 12 cm. The system can use the car's cameras for precise positioning.

Application prospects

Revolution in electric vehicle charging 270 kW wireless and hassle free

Wireless charging is ideal for future generations of driverless robotaxis. Small fleets of such autonomous taxis are already operating in China, the United States and Europe. The system can be fully automated, which will simplify the charging process for delivery and taxi services.

The prototype 270 kW charger is compatible with a variety of vehicle types, including cars and trucks of varying ground clearances. The system is capable of operating with an air gap of up to 28 cm.

Safety

ORNL assures that their design complies with all electromagnetic regulations radiation, creating a field of about 19 microtesla without additional shielding.

Glossary

ORNL (Oak Ridge National Laboratory) is an American scientific research organization , which develops innovative technologies
Porsche Taycan - an all-electric sports sedan produced by the German company Porsche
Hyundai Kona - a compact electric crossover from the South Korean automaker Hyundai
Hyundai Ioniq 5 is a mid-size electric crossover from Hyundai
Brusa is a Swiss company specializing in the development and production of electronic components for electric vehicles

FAQ

What power was achieved with wireless charging of an electric vehicle?

Engineers from the Oak Ridge National Laboratory managed to achieve a record power of 270 kW when wirelessly charging the Porsche Taycan sedan. This allows you to replenish the battery charge by 50% in about 10 minutes.

What are the advantages of wireless charging over wired charging?

Wireless charging does not require the use of bulky cables, which is convenient for the elderly and people with disabilities. It is less susceptible to vandalism and theft, easier to maintain, and has no problems with overheating and loss of power. In addition, it is ideal for autonomous vehicles and can be automated.

How does the Oak Ridge wireless charging system work?

The system uses a magnetic resonance transmitter and receiver on the underside of the vehicle. The key feature is the multiphase windings - lightweight electromagnetic coils that create a rotating magnetic field. This ensures constant energy transfer without pulsation, which significantly increases the efficiency of using the magnetic field.

How safe is wireless charging for others?

ORNL says the system meets all electromagnetic field emission limits. Without additional shielding, it emits a field of about 19 microtesla, which is within acceptable safety standards.

What are the limitations of the Oak Ridge wireless charging system?

The system allows vehicle movement of more than 12 cm while maintaining efficient charging. It can operate with an air gap of up to 28 cm between the receiver and transmitter, allowing it to be used for different types of vehicles with different ground clearances.

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2024-07-29

Engineers at Oak Ridge National Laboratory (ORNL) set a new record for wireless electric vehicle charging, achieving 270 kW of power when charging a Porsche Taycan. This technology does not require precise parking and is safe for health.

Larisa Shishkova
Larisa Shishkova Copywriter Elbuz

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