It's certainly doesn't seem to be the case on my 2017 vehicle. I tested this out just the other day - 100% charge and a long steady downhill (2 miles), but not so steep that the brake lights come on - the regen indicator was sitting around the A & R of 'CHARGE' on the display. My friend following confirmed that the brake lights were not on. The instrument display was showing a 'charge' during the downhill, but the battery simply sat at 100% despite having the AC on max.I33t wrote:Has BMW changed the method?
I initially accepted that the brakes were not used, but I was corrected:
We live up on a hill. When I drive down with 100% battery, I can hear the brakes grinding, and I rarely use the brakes on the i3. Yet there is noticable wear on the front discs since 2014.
If it is not the brakes, what is making the front end noise just like brakes when I back off on the accelerator?
I must say, I'd be really annoyed to discover that my car was riding the brakes all the way down this hill - not a smart idea! It didn't sound (or feel) like the brakes were engaged. Perhaps it's a combination of light braking and some deceleration from the motor/generator, but my brakes are still rusty at the bottom so who knows?
As far as 'protecting the battery from overcharging' from that other thread... I would have thought that this would be done at the electronics level, not simply by using brakes instead of regenerative braking because otherwise the 'power will go to the battery no matter what'. That would be a fairly clumsy & crude way of protecting the battery surely?