Approximately 10 seconds and 55 meters is all the BMW i3 needs to stop from 50 km/h or 31 mph without using its friction brakes thanks to the i3's strong regenerative braking abilities..
At least this is the interesting result from a test conducted at 75% state of charge and temperature: 24°C in the video attached below.
We don't know too much more, so don't expect any analysis. However, for anyone interested in rear-wheel-drive regenerative braking. we previously found this demonstration.
"This is a little recu test. I drove 50 kph and tried to find out how long it takes to stand still without using the brake pedal. It turned out that it are 55m which means a constant acceleration of 0.18g or 1.75 m/s². Battery is at 75%. Outside tempretaure: 24°C."