Let’s wirelessly charge everything

Wireless charging, also referred to as inductive charging, is based on the principles of magnetic resonance. The technology consists of two coils, a receiver coil and transmitter coil. The receiver coil is embedded into the original device (for example, a mobile phone) while the transmitter coil is embedded into the wireless charging device. When alternating current (AC) is passed through the transmitter coil, a magnetic field is generated. This is what creates the voltage in the receiver coil that powers the device or charges a battery.

Wireless charging isn’t a new concept however. Think about the Oral-B rechargeable toothbrush. This device has been using inductive charging since the 1990s. Then in 2006, The Massachusetts Institute of Technology revealed its research, demonstrating efficient power transfer between coils that were separated by a few metres. What followed was a slew of unveilings with optional inductive charging accessories. Now, major companies like Samsung, Apple and Blackberry are offering wireless chargers as well.

Wireless charging has become so popular that back in 2008, 230 companies joined together to support the Qi wireless charging standard, forming the Wireless Power Consortium (WPC).

Other markets

According to Research and Markets, the global wireless charging market is likely to grow significantly in the future because of emerging trends like the increased adoption of wireless EV charging, which demands wireless technology. The high growth potential of wireless charging has compelled many automobile companies to implement wireless charging systems for EVs and plug-in hybrid electric vehicles (PHEVs).

When it comes to wirelessly charged cars, plugless charging started with models like the Nissan Leaf and Chevy Volt, and now the Tesla Model S is catching on.

With the help of a system called Plugless, a Tesla Model S can be charged wirelessly too. The cars charge on a parking pad that can be installed by plugging into any 50A circuit near the spot. The wireless charger boasts a 7.2kW charge – the equivalent of 20 miles for every hour charged.

Wireless charging became even more popular last year when Ikea introduced wireless charging furniture, integrating Qi power into beds, side tables, lamps and desks to eliminate dreaded cable messes.

A company named Ossia recently introduced its flagship product, Cota, a wireless power solution that safely delivers remote, targeted energy to devices from six feet to as far away as 30 feet, depending on the charger model. The company developed smart antenna technology that allows for multiple devices to charge without any user intervention, enabling a wire-free experience.

That means smart home products, wearables and other devices remain charged at all times - without users having to plug devices into a charger or place them on a charging pad. Cota technology functions similarly to the way Wi-Fi transmitters deliver data to devices, transmitting both energy and data around corners and over obstructions without requiring a direct line of sight.

“For the Internet of Things and wearables to reach their full potential, it’s absolutely essential to have a source of wireless power, as well as a cloud-based technology platform that enables devices to work together seamlessly,” said Hatem Zeine, founder and CEO of Ossia and creator of Cota technology. “OSF’s cloud technology expertise combined with Cota’s innovative wireless power technology removes the remaining hurdles to widespread smart home and wearables adoption, and we’re excited about working with OSF to demonstrate our technology’s amazing potential.”

Summary

Wirelessly charging devices reduces the risk of electrical faults like short circuits, creates less wear and tear on devices, and is an overall convenient charging alternative. However, it can result in slower charging rates due to lower efficiency and can sometimes be costly due to the extra electronics required in the device and charger. Like any emerging technology that is poised to grow, new solutions will continue to arise in hopes of making it even more efficient for consumers.