Wireless recharging technology development for electric vehicles – has been around for a while and is now gaining more interest for PHEV and BEV owners and Auto manufacturers.
Interestingly when I talk to people about EV’s and mention wireless charging, I often get a response of “Wireless Charging, you’re kidding?” “No need for cables and plugs?” Wow!
Well, lots of work has been going into producing affordable and convenient wireless induction charging products and now the Society of Automotive Engineers (SAE) has set the ground work for an international single electrical standard for wireless charging.
The SAE Wireless Charging Guidelines.
SAE TIR J2954 guidelines have been released with the aim of setting a wireless induction charging equipment standard for Plug-In Vehicles. The SAE set up the J1772 standard for 240 volt – level 2 charging plug connectors and we now have J2954 for wireless equipment.
The guideline provides recommendations covering a range of charging power capabilities: 3.7kilowatts, 7.7kW, 11kW and 22kW for faster DC charging rates. A 22kW wireless fast charging unit could recharge an i3 BMW 22kWh drive battery from low to 80% in about 30-40 minutes
Aftermarket Wireless Charging.
There’s a number of businesses such as ‘Plugless’ in the USA, that have been supplying home wireless EV charging gear that can be installed in the home for level 2 charging.
- (Level 2 charging uses a 30amp electric circuit and is capable of a charging supply rate of up to 7.2kW per hour on a 240 volt supply).
Vehicles such as the Nissan LEAF and Chevy Volt need to have a wireless charging receiving unit installed under the car to pair with an induction plate installed on the floor of the parking spot.
See the Plugless website on how easy charging can be.
Car Makers to offer Wireless Charging.
We’re now seeing automotive manufactures like BMW and Mercedes Benz looking at providing the technology as an accessory for their Plug-In Vehicle models. eg: 2017 Mercedes Benz S 550e PHEV
Motorsport – Wireless Charging.
Like most advancements in technology for the automotive industry, motorsport plays an ever increasingly important testing ground to perfect the technologies that improves the cars we drive every day.
Two of the FIA’s Formula E series sponsorship partners, namely BMW and Qualcomm Halo, have been working on improving wireless EV charging.
Qualcomm Halo have provided wireless charging to the BMW i8 pace car and the i3 course doctors’ and officials vehicles at each ePrix events around the world. While the i8 and i3 BMW’s are parked at trackside they are wirelessly charging to ensure their battery packs are topped up ready to speed off when needed.