|BMW's inductive charging system uses two electromagnetic coils. One attached under the vehicle and the other one is located underneath the car. BMW is using some retired ActiveE's for the test fleet.|
Will the next generation BMW i3 have a wireless charging option? That appears very possible with the announcement that BMW is working with rival Daimler on developing an inductive charging system for their electric vehicles.
This follows a recent announcement from Toyota that the next generation plug in Prius would have wireless inductive charging available. Toyota is using technology from Massachusetts-based WiTricity for their system. It's unclear if BMW is also working with WiTricity or if they and Daimler are developing the system on their own.
The two things about inductive charging that have always made me question its viability are the charging losses incurred and the rate of charging. I'm just not willing to pay a 10% premium on my energy just so I don't have to take a couple seconds to plug in my car. Wireless charging will never be quite as efficient as conductive charging, but the technology does seem to be getting better. BMW claims the system they are developing is better than 90% efficient so that's good news. Personally I'd like to see it get closer to 95% efficient though, which would make the energy loss a little more palatable. The charging speed is another issue. The system BMW is working on is limited to 3.6kW which is only half the rate of speed the i3 can charge at. BMW has said that they are working on improving the charge rate to 7kW which would be a great improvement, but would that then lower the efficiency?
Inductive charging for public locations makes sense.
|Public EVSE has cables stolen|
An answer to a problem that doesn't exist?
|One of my home EVSEs|