Wireless electric vehicle charging explained

Asia's Tech News Daily

Since many of us now charge our smartphones and earphones without cables, placing them on a wireless charging pad at the end of each day, an obvious question from electric car drivers presents itself – can we do the same with an EV?

At a technical level, the answer is yes. Electric cars use the same lithium-ion battery technology as devices like smartphones, so if equipped accordingly their batteries could also be charged without plugging in a bulky cable. Handy if it’s raining, or for on-street parking where installing chargers at the roadside isn’t convenient.

It is still early days for wireless EV charging, but progress is being made on numerous fronts. Vehicle manufacturers like BMW have already experimented with the technology, and today there are trials already in operation where specially-equipped cars can be charged wirelessly in public parking spaces.

There’s even a car about to go on sale, the Genesis GV60, that has wireless charging hardware fitted, ahead of a pilot kicking off in 2022.

How does wireless electric vehicle charging work?

Charging cars without wires works in a similar way to the wireless phone charger you might already own, just on a bigger scale.

You might have noticed how you can lift your phone very slightly off its charger without stopping the flow of electricity – wireless car chargers work in the same way, but at a distance measured in inches instead of millimeters.

In both cases, the technology required is called inductive charging. This is where electricity is transferred through an air gap from one magnetic coil in the charger to a second fitted to the smartphone or car. All you have to do is park in the right place, to ensure both coils are aligned, then charging can begin.

One EV wireless charging trial happening right now, run by a charging company called Char.gy, is a 12-month trial that kicked off in the UK in October 2021 that will eventually see 10 wireless charging pads installed into parking spaces across the county of Buckinghamshire.

The first is located in Marlow, 35 miles west of London, and can be used by a fleet of 10 Renault Zoe cars modified to work with the wireless chargers.

Char.gy said when the trial began: “This infrastructure means no charging cable – potentially hazardous for other road or pavement users – and no lamp-post charging and is only activated when an EV parks over it.”

Similar inductive charging technology has been in use by the #7 bus route in Milton Keynes, UK since 2014, wirelessly topping up the battery for 10 minutes at the start and end of the service’s 15-mile route.

In a similar fashion, Nottingham, UK began a wireless charging trial for electric taxis. In this case, 10 taxis were fitted with inductive charging technology, which they used to top up their batteries while parked at certain ranks and waiting for their next fare.

This is a common theme when talking about wireless EV charging – a little-and-often approach, instead of the quicker but less frequent use of fast plug-in chargers.

As for installing such a charger in the home, a US firm called Plugless Power (formerly Plugless) is working on its third-generation inductive EV charger, due in 2022.

These are designed to work with a US domestic 240V output, fit to existing cars, and the company claims power can be delivered through an air gap of up to 12 inches, meaning wireless charging of taller vehicles like SUVs and trucks could be possible.

Plugless Power says its upcoming third-generation wireless charger has a target price of $3,500, plus installation, and it is working on chargers for the European market too.

Which cars can be charged wirelessly today?

Currently, it is the charger manufacturers that are making both the chargers and the hardware needed to give an EV inductive charging. Some vehicle manufacturers have expressed interest in adding inductive charging as standard, with BMW running a trial with its 5 Series 530e iPerformance hybrid in 2018.

The trial began in Germany and expanded to the US in 2019, with a small group of California residents invited to lease a 530e hybrid with wireless home charger for 36 months.

Power is transmitted over an air gap of three inches and is delivered with 85 percent efficiency. It has a charging power of 3.2kW, which is enough to fill the battery in 3.5 hours.

Genesis is also working on inductive charging, and is making the feature available as an option on the new GV60 EV. Genesis claims the optional inductive charger will refill the SUV’s 77.4kWh battery more quickly than a typical home wall charger.

Genesis is quoting a full charge of the 280-mile vehicle in six hours, compared to 10 hours via a conventional wall charger.

  • Solar panels, hydrogen and wireless charging – Kia’s big plans for its EV future

The inductive hardware comes from charging specialist WiTricity, but buyers will have to buy the actual charger, to be fitted into the floor of their garage, themselves.

Genesis says the feature will only be available in South Korea initially, and the inductive charging system won’t be activated on vehicles until late-2022.

Speaking of WiTricity, the Massachusetts-based firm was established in 2007 and has worked on wireless charging technology ever since. The VC-backed startup acquired Qualcomm’s Halo inductive charging technology in early-2019, with Qualcomm becoming a minority shareholder in WiTricity.

WiTricity claims it can charge wirelessly with a power efficiency of between 90 and 93 percent at a rate of between 3.6kWh and over 11kWh, and across a distance of between 10 and 25cm.

Qualcomm has previously said how its halo technology could charge wirelessly at up to 22kW, suggesting WiTricity is keeping plenty in reserve.

Charging while driving

This is the holy grail of electric car technology; the ability to power a car as it drives over chargers embedded into the surface of the road.

As part of its development of the Halo system, Qualcomm proved in 2017 that charging while driving is possible, even with the vehicle traveling at up to 70mph.

Underneath the regular-looking road surface of its 100-meter test track, Qualcomm installed a wireless charging system capable of sending power to a fleet of specially modified Renault Kangoo electric vans, each fitted with two 10kW charging pads.

Fast-forward to 2021, and while public roads can’t yet charge electric vehicles, the US states of Michigan and Indiana are both keen to implement the technology.

Most recently, Michigan governor Gretchen Whitmer said in October 2021 how a one-mile stretch of road would be chosen to run a vehicle charging pilot.

As with in-pavement charging trials in Indiana, the exact location (and a timeframe) hasn’t been disclosed. Such trials are also taking place in Israel and Norway.

Crucial for autonomous cars

It doesn’t take much imagination to see how useful such a road would be for autonomous cars of the future.

Instead of robotic taxis taking themselves to the charger every few hours – or, even worse, requiring a human to jump in and take them – they would be constantly charged from the road as they drive along.

It’s sometimes easy to dismiss wireless charging as a gimmick – after all, you don’t really need to charge your phone without a cable. Similarly, jumping out and plugging in an electric car only takes a few seconds.

But if chargers can be embedded into the roads – something WiTricity, Plugless Power and others clearly want to make a commercial success – then the impact could be revolutionary.

  • I played Deathloop on the 10-inch screen in an EV, and it was painful
Internet Explorer Channel Network
Asia's Tech News Daily
News Related


Chromecast with Google TV's best feature is being delayed

One of the most useful and anticipated Chromecast with Google TV features, that being individual user profiles, has now been pushed back into next year, Google confirms. Due to release ... Read more »

Does vaping really damage DNA and increase the risk of cancer?

Vapers experience DNA changes, according to a recent paper published in Nature, and the changes are similar to those seen in smokers – although much less pronounced. Crucially, this evidence ... Read more »

Most of India's USD 1.1 trillion growth in next 11-year can come from yet to be invented digital businesses: Report

Most of India’s USD 1.1 trillion in total economic growth in the next 11 years can come from ancillary digital asset-related businesses that are yet to be invented, according to ... Read more »

Microsoft is making Windows 11 less annoying

Microsoft is working on a new Windows 11 feature that’ll remember if you turned on Wi-Fi or Bluetooth while the computer was in Airplane mode. With the current version of ... Read more »

Why celebrate pizza? Google Doodle shares the cultural heritage of pizza around the world

You may have sliced a few pizzas on Monday’s Google Doodle, which features versions of the culinary favorite from all over the world. Google’s interactive Doodle allows you to slice ... Read more »

Is the Galaxy S21 FE Samsung's worst-kept secret? New leak suggests so

It feels like every day we’re hearing a new Samsung Galaxy S21 FE leak, and it’s starting to rival the Galaxy S22 as the most-rumored product right now. Case in ... Read more »

Samsung Galaxy S22 series could feature Snapdragon 8 Gen 1 chipset in India

The Samsung Galaxy S22 is reportedly arriving in India with the Snapdragon 8 Gen 1 chipset rather than the Exynos 2200. Samsung’s 2022 flagship is slated to arrive in Exynos ... Read more »

One in four colds is likely down to COVID, expert warns

Boris Johnson will review current COVID-19 measures on 18 December. (PA Images) One in four colds is likely down to people having coronavirus, an expert has said. Tim Spector, a ... Read more »

Doja Cat's latest interactive music video will teach you how to code

Doja Cat has partnered with nonprofit organization Girls Who Code to create what they claim to be the first-ever codable music video, allowing users to control the story to the ... Read more »

If Apple's next watch is built for extreme sports, it'll need an extreme redesign

One of the main selling points of this year’s Apple Watch 7 was its tougher screen and improved dust resistance, and new rumors suggest that Apple is planning to take ... Read more »

Johnson: We need to invest in rehab to help drug users

Boris Johnson says “everybody who knows about drugs crime will tell you” there needs to be more investment in rehab to drive down crime. He argues, however, that the government ... Read more »

I'm a Celebrity: Snoochie Shy opens up about revealing her birthmark for the first time

The radio presenter said she used to cover up her birthmark with make-up but feels more like herself for revealing it. Read more »

iRobot Roomba i3 Plus review

One-minute review iRobot is a US-based robotics company that was founded in 1990 and launched the first Roomba robot vacuum in 2002. It’s one of the biggest manufacturers of robot ... Read more »

This humanoid robot makes perfect human-like faces

London: As robots evolve to do more work around us, the UK-based humanoid robot manufacturer Engineered Arts has infused more human-like facial expressions into one of its robots, which may ... Read more »

Oppo signs a Memorandum of Understanding with IIT Delhi to offer scholarships

New Delhi: To empower young minds of India, Oppo has signed a Memorandum of Understanding with IIT Delhi to offer scholarships covering academics expenses for the shortlisted students.The brand has ... Read more »

Microsoft wants to revolutionise copy and paste in Edge and Chrome for Windows 11

It looks like Microsoft is planning a radical overhaul of how you copy and paste in its Edge web browser in Windows 11 – and those changes could also come ... Read more »

Oura ring review: Does the celeb-favourite activity tracker live up the hype?

We considered its tracking ability, how comfortable it was to wear and the app’s features (The Independent) Since hitting the smart tech market a few years ago, Oura’s health tracker ... Read more »

Arthur Labinjo-Hughes: Father and stepmum sat in hot tub while boy left in hallway for hours

The case of Arthur Labinjo-Hughes has shocked the nation. (PA) The killers of Arthur Labinjo-Hughes relaxed in a hot tub while the six-year-old boy was left alone for hours, it ... Read more »

Apple could launch lots of new Macs in 2022, including new cheaper MacBook Pro

Apple is rumored to have a bunch of new Macs coming next year – five of them to be precise – and that might include a new cheaper MacBook Pro. ... Read more »

Scientist behind UK vaccine says next pandemic may be worse

On Location: December 3, 2021 Catch up on the developing stories making headlines.ABCNews.com LONDON — One of the scientists behind the Oxford-AstraZeneca COVID-19 vaccine is warning that the next pandemic ... Read more »

Is a Daredevil Disney Plus show in the works?

Marvel chief Kevin Feige has seemingly confirmed that the studio plans to bring Charlie Cox on board so he can reprise his role of Daredevil in the MCU – suggesting ... Read more »

Apple starts legal action against Russian regulator in App Store dispute: Report

Apple has started legal proceedings against Russia’s anti-monopoly regulator in a dispute concerning alternative payment options on its App Store platform, the RIA news agency reported on Sunday citing court ... Read more »

iPad Pro redesign and more iPad updates tipped for 2022

Over the last year Apple has treated us to new models of the iPad Pro, the iPad mini, and the entry-level 10.2-inch iPad, but it doesn’t appear to be slowing ... Read more »

We're finally getting a PS5 pro controller, but it's not being made by Sony

A PS5 pro controller is finally on the way thanks to renowned manufacturer Scuf, which should give PlayStation gamers an edge when playing online. Sony doesn’t have its own version ... Read more »

Sony HT-A9 review

Two-minute review When it comes to home theatre, there are casual users that are satisfied with soundbars and enthusiasts that want a cinema-like experience with multiple speakers all around them. ... Read more »

The Boys is getting another spin-off – and it lands next year

The Boys is getting another spin-off TV show on Amazon Prime Video – and it’ll be released on the streamer in early 2022. Announced by The Boys star Karl Urban ... Read more »

Best NZB indexing websites of 2021

The best NZB indexing websites make it simple and easy to find files, threads, and topics in Usenet groups. The best NZB indexing websites Click the links below to go ... Read more »

‘Stalker 2': Xbox store lists game's ‘approximate size' as 180GB on Xbox Series X/S

From the “Stalker 2” gameplay trailer | Photo credit: Xbox / YouTube screenshot “Stalker 2” is one of the most anticipated games on Xbox Series X/S. The game is still ... Read more »

Moto Edge X30 specifications officially revealed ahead of December 9 launch event

Motorola is launching the Moto Edge X30 in China later this week. The Moto Edge X30 is arriving on December 9 and will be the company’s first smartphone to feature ... Read more »

Samsung Galaxy tab S7 FE review: Can this affordable tablet rival Apple's iPad?

We tested for ease of set up, speed and responsiveness in everyday use (iStock/The Independent) When choosing a tablet, you’ll have to make a few decisions. What size screen are ... Read more »

F1 news LIVE: Max Verstappen penalised as Lewis Hamilton accuses rival of going too far in Saudi Arabia

Follow all the latest F1 news and reaction after Lewis Hamilton won a chaotic Saudi Arabian Grand Prix to draw level with Max Verstappen in the standings with only one ... Read more »

Users face removal of passports and driving licences under Boris Johnson's new 10-year drugs plan

Harsher punishments to deter drug use, including the removal of passports and driving licences, night-time curfews and travel bans like those imposed on football hooligans, will form part of a ... Read more »

Galaxy S21 FE: Samsung accidentally posts official image before mid-range phone is announced

Photo credit: N.Tho.Duc / Unsplash The latest leak about the Galaxy S21 FE has, ironically, come from Samsung. The company appeared to have accidentally posted the upcoming mid-range phone’s promotional image after its ... Read more »

WhatsApp is making voice messages look more exciting

Voice messages are, by their very nature, an audio experience – but this is something that WhatsApp is looking to change. When you receive a voice message form a contact ... Read more »

British teenager attacked by 10ft crocodile describes relief at not losing leg

Amele Osborn-Smith, 18, from Andover, Hampshire, spoke from hospital in Zambia, where she’s recovering from a crocodile bite while white-water rafting near Victoria Falls. Read more »

Excellent Bose headphones deal sees best noise-cancelling earbuds hit lowest price

The best noise-cancelling earbuds you can buy in 2021 have been giving a stellar discount in the US and the UK, plummeting to the lowest prices we’ve ever seen. The ... Read more »

iQoo Neo 6 tipped to launch soon, may come with Qualcomm Snapdragon 888

Vivo’s sub-brand iQoo may soon launch iQoo Neo 6 phone. The handset has allegedly appeared on Google Play Console, revealing its key specifications. As per the listing, the smartphone may ... Read more »

'Metaverse is about seeing things in more integrated way'

Kim Beom-joo, head of evangelism at Unity Korea, speaks during an interview with The Korea Herald at Unity Korea in Seoul on Nov. 29 (Park Hyun-koo / The Korea Herald)Metaverse, ... Read more »

Samsung‘s Lee Jae-yong to leave for Middle East

Samsung Electronics Vice Chairman Lee Jae-yong arrives at Seoul Gimpo Business Aviation Center on Nov. 24, ending his weekslong visit to the United States. (Yonhap)Samsung conglomerate’s de facto leader Lee ... Read more »

SoftBank drags Japan's Nikkei lower; hopes of milder Omicron impact cap losses

Japan’s Nikkei share average ended lower on Monday, dragged down by a sharp decline in SoftBank Group, but optimism that the Omicron variant might not have as much impact on ... Read more »
On free-english-test.com you will find lots of free English exam practice materials to help you improve your English skills: grammar, listening, reading, writing, ielts, toeic