The underlying principle behind wireless charging was actually proven possible over 100 years ago by a man we're now all familiar with, Nikola Tesla.
He was the first to demonstrate the phenomenon which is magnetic resonate coupling - a practice that enables electricity to transmit THROUGH THE AIR. That's great but again, how the f*ck is that possible.
It's called a magnetic field. There are two ways to create magnetic fields and it's important to be clear - There is a magnetic field created by permanent magnets, which are the kind that you probably played with as a kid. But we're interested in the magnetic field created by temporary magnets or electromagnets.
Tesla knew that when electricity flows through a conductor like copper wire, an electromagnetic field was created (faraday discovered this, but Tesla was the first to use it to wirelessly transmit power). The extent of this field was limited, but further experimentation revealed that coiling the copper wire concentrated the electromagnetic field enough to actually transmit into a resonating conductor connected to a light bulb. Boom! Wireless charge Baby.
Fast forward a hundred years and we're beginning to realise (took us long enough) Tesla’s vision for wireless energy. Your toothbrush was probably the first conventional appliance in your life to take advantage of wireless charging but now we're seeing it pop up in many of our devices most significantly our phones.
Wireless charging pads have one or multiple copper coils embedded underneath the surface. The electric current travels through these coils, to be received by the coils that are implanted in the backs of most modern smartphones. The coils are tuned to the same resonate frequency. So the field created by the charger oscillates at the resonate frequency in the phone's coil, which enables the efficient transfer of energy that is fed into the phone's battery. Pretty darn cool.
Fortunately for you and me, electromagnetic fields are non-ionising meaning they’re completely biologically safe. So please don’t let anyone try to tell you that wireless chargers will give you cancer -.-
So where are we going with this?
It might be a bit optimistic, but we'd like to believe that eventually no cords or wires will burden our lives in the future (we're talking beyond our lifetime). Imagine that your home has one point of energy that produces an electromagnetic field strong enough to power all your devices and appliances. But for now, it will continue to improve on a micro-scale and our mobile devices like our phones and laptops will benefit from this technology.
We look forward to the future and being there to #boostyourjuice