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November 13, 2024

Wireless EV Charging: What It Is and Why It’s Worth the Try

The Wireless Electric Vehicle (EV) Charging Systems Market in the automotive market is expected to reach $2.5 billion by 2030, with an impressive annual growth rate of 50.1% over the coming years. This growth is primarily fueled by the increasing demand for fast-charging infrastructure for electric vehicle fleets, the expanding deployment of wireless charging technology across Europe, and concerns over EV driving range. Standardizing wireless EV charging systems and the rising adoption of autonomous vehicles in public transit and delivery services are also anticipated to create significant opportunities for market players.

 

The shift to wireless technology across devices like phones and headphones extends to EV charging, poised to transform industrial solutions. Through system integration of embedded induction technology in EVs, wireless charging enables both stationary and dynamic charging, allowing vehicles to charge without a physical connection—even while driving. Global pilot projects showcase dynamic charging's potential to increase EV adoption by extending driving range and reducing the need for frequent stops.

Wireless EV Charging: What It Is and Why It’s Worth the TryIn 2020, the Society of Automotive Engineers (SAE) introduced official standards for wireless EV charging, prompting automakers to conduct testing and develop prototypes discreetly. Although consumer availability is still uncertain, research firms are making progress.

Oak Ridge National Lab recently made a significant advancement, using coils that delivered 100kW of power with 96% efficiency—reaching a 50% charge within 20 minutes. Efficiency remains a major challenge for the broad adoption of wireless charging, which many consumers may favor for its convenience and elimination of cumbersome charging cables. Leading automakers like Tesla, Geely, Hyundai, and BMW are also said to be advancing their wireless charging technologies.

How does wireless EV charging work?

Wireless EV charging employs resonant electromagnetic induction, similar to the method used for smartphones, to facilitate power transfer—often referred to as inductive charging. This technology involves a magnetic coil in the charging pad that generates a current, which is then captured by a corresponding coil located on the underside of the vehicle. When the EV is correctly aligned over the pad, charging commences.

Wireless charging systems for EVs boast efficiency rates comparable to traditional plug-in methods, typically ranging from 80 to 95%. WiTricity, a leader in wireless EV charging solutions, reports that their systems achieve an efficiency of 90 to 93% percent. These systems can deliver up to 20kW of power, equating to Level 2 charging speeds, and there is potential for even greater manufacturing capabilities in the future.

While the technology is not entirely new—Qualcomm launched its Halo system in 2012—interest has surged with the uptick in EV sales. This process relies on magnetic resonance, transferring energy through a magnetic field between two magnetically linked oscillating coils, one in the ground pad and the other in a receiver installed within the vehicle. This receiver feeds direct current (DC) into the battery and is positioned above the onboard charger.

Although current EVs typically lack this receiver and require significant retrofitting to enable wireless charging, future models are expected to integrate this feature. Safety studies indicate that the magnetic field operates at frequencies well below common radio waves, allowing for safe passage over the pad by people and animals, even while charging. This advancement represents a significant leap in manufacturing capabilities within the automotive industry.

Benefits of wireless EV charging

Experience the freedom and convenience of wireless charging, where tangled cords are replaced by effortless power on the go.

  • Boosted safety

Safety is enhanced by eliminating the wear and tear cables endure in extreme temperatures, which can lead to hazards. No wires mean reduced risks of tripping over bulky wires and no repetitive strain from handling cords.

  • Convenience

Wireless EV charging works seamlessly in all weather conditions with no need for precise parking or dealing with ice, snow, or dirt. With no heavy cables to carry or plugin, drivers enjoy effortless charging and reduced range anxiety.

  • Speed and efficiency

Enjoy the speed and efficiency of traditional plug-in options without the need to exit and connect cables. With advanced battery management systems, dynamic charging may significantly reduce charging times in the future, enhancing overall convenience for EV owners.

  • Being future-ready

Wireless charging will facilitate the development of autonomous vehicle applications and Vehicle-to-Grid (V2G) technologies, ensuring that fleets are well-equipped for the future. As global manufacturing adapts to these advancements, the integration of wireless charging will enhance efficiency and sustainability in transportation.

  • Cost savings

While substituting traditional systems can incur significant expenses, adopting wireless charging technology can minimize utility demand costs by efficiently spreading out charging routes. This innovative technology also fosters a more sustainable electric vehicle infrastructure, ultimately benefiting consumers and the environment.

  • Less maintenance

Wireless charging provides more reliable service than older plug-in systems, reducing the chances of revenue loss for providers. With no moving parts, it requires less maintenance, which means fewer disruptions and a more convenient, hassle-free charging experience for consumers.

  • Space saver

This charging type allows tighter parking arrangements, helping you maximize your available space. With dynamic charging, vehicles can receive power while in motion, eliminating the need for traditional charging stations, which can reduce resource use and emissions associated with infrastructure.

Wireless EV charging challenges

Despite its advantages, wireless EV charging faces several challenges that global manufacturing companies must address for effective implementation and widespread adoption in the market.

  • Limited charging rate

Wireless charging technology is evolving and has not yet reached Level 3 charging capabilities. Currently, it cannot deliver the rapid charging speeds many drivers seek for quick turnarounds.

  • High cost

Setting up induction coils beneath current roadways is both complex and costly. This installation process, combined with the substantial expenses of wireless charging systems, could slow the expansion of the market.

  • Low demand for wireless-enabled EVs

With so few wireless charging stations available, consumer demand for EVs with wireless receivers remains low, giving manufacturers little incentive to produce vehicles equipped with this technology at scale.

Wireless EV charging is an emerging technology with promising benefits but still faces several challenges. However, as demand grows and technology advances, wireless charging could become a more practical and appealing option, potentially transforming the EV landscape and supporting a more sustainable future.

Wireless EV Charging: What It Is and Why It’s Worth the TryAs one of the Top 20 EMS companies in the world, IMI has over 40 years of experience in providing electronics manufacturing and technology solutions 

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