When the wireless charging power of electric vehicles breaks through 300kW, when the underwater robot achieves 50 meters deep sea charging, high-power long-distance wireless charging technology is reshaping the basic logic of energy transmission.

Physical principle innovation

The traditional Qi standard is limited to 15cm/15W, and the new technical route includes:

- Magnetic quasi-static field coupling (MIT team achievement) : transmission of 10kW at a distance of 3 meters, efficiency 92%

- Terahertz beamforming (Samsung patented technology) : directional transmission avoids energy diffusion

Metamaterial waveguides: The Chinese Academy of Sciences team uses metasurface materials to extend the transmission distance to the room level

Commercialization milestone

The industry will usher in key breakthroughs in 2024:

- Mercedes-Benz EQ series production car equipped with 11kW ground charging panel

- Schneider Electric releases the explosion-proof 200kW wireless charging system for mining

- Ossia launches Cota Reality system, enabling simultaneous power supply of multiple devices within 5 meters

Cross-industry application map

- Medical field: Johnson & Johnson surgical robots achieve wireless power supply during surgery, eliminating the risk of wire tripping

- Offshore engineering: CNOOC tests wireless power supply for the seabed observation network to ｒｅｐｌａｃｅ high-risk underwater connection operations

- Aerospace: SpaceX plans to use wireless charging stations on the moon to power the rover

Energy efficiency controversy and truth

In response to the question of "wireless loss is higher than wired", the International Energy Agency (IEA)2023 white paper states:

- When transmitted within 3 meters, the new topology makes the overall energy efficiency of the system 8% higher than that of the wired solution (considering the loss of the transformer link)

- Dynamic impedance matching technology increases the number of full discharge cycles to 100,000

Standard war and investment winds

The merger of A4WP and AirFuel Alliance has led to a new standard system, and the China-led MBWC standard has been recognized by 35 patents. According to a Goldman Sachs report, venture capital investment in this area will surge by 170% in 2023, with mid-range (1-5 meters) technology accounting for 61%.