Showing posts with label experiment. Show all posts
Showing posts with label experiment. Show all posts

Dec 7, 2013

Blind Driving an EV in Freezing Weather

Arctic air has engulfed the U.S.  For most EV drivers, sub-freezing temperatures present a real stress for their electron-motivated commutes.  Depending on how low the mercury goes, an electric vehicle may lose more than 20% of it's range when the deep freeze arrives.

Last month, I decided to try an experiment:  I would completely disable all dashboard illumination in my LEAF, taking away any ability to see how much charge remained in the battery pack.

The Nissan LEAF comes with a host of displays that provide the driver with a plethora of data points:


Now, three weeks have gone by.  Surprisingly, I'm not suddenly running out of electricity every trip.  Some things have drastically changed, though, since the start of blind driving.  My EV-induced attention-deficit disorder is gone!  Also, I am utilizing the LEAF's heater with blissful ignorance.  Not only that, but I'm driving at speeds that are dictated by my desire.  Or traffic flow--whichever is faster. 

There have been some close calls.  I know because even with the visual displays turned off, the "LEAF lady" still provides audible warnings when the battery charge is "Low, Very Low, Reduced Power."  I have received quite a few (very) low battery warnings, but not the reduced power warning, during this experiment.   
Cutting it close!
Occasionally, after arriving home, I'll look to see how close I was to getting stranded on the side of the road with a dead battery.  In the picture above, you can see that I am cutting it close on occasion.  On the left, the official Nissan LEAF app indicated zero range remaining; the image on the right showing 8 GIDs (EV driver vernacular).

I figured out to get the dashboard display to turn off even in daylight driving;)

With the findings now published, my experiment is officially done.  I think, though, that I'll keep the lights out...serenity now.

My wife is an attorney, so here's the disclaimer that I know she expects from my shenanigans:
Willingly driving without any instrumentation is not only dangerous, but completely moronic.  Don't try it!