I'm really surprised that this is such a controversy... I thought that
everybody knew that one of the main reasons that the battery packs for all
OEM EV's did last such a long time was that the BMS software stopped the
charging at about 80% and will not let the battery pack be depleted below
20%.
If you only charge a battery to about 80% and don't let it discharge below
about 20% the chemical makeup of the electrolyte is not stressed and lasts a
lot longer.
Roland does the same thing with his batteries. I think that if he sees only
a 75%SOC, then he will not charge until the next day, thereby prolonging the
life of his flooded lead acids. 8 years if I remember correctly.
Rush
www.TucsonEV.com
> -[original]
> > ... Rated range rises to 84 miles Most importantly to new buyers, the
> > range of the 2014 Leaf is now listed as 84 miles, up from last year's
> > 76 miles
> >
> > That number seems like a significant improvement, but in fact the only
> > change made to the car is the elimination of a software option that
> > let owners set battery charging to stop at 80 percent.
> >
> > In other words, the 2014 car has exactly the same battery, drivetrain,
> > and real-world range as the 2013--only its EPA range rating has
> > changed.
> >
> > Changing the rating math Nissan made the change because last year,
> > under EPA rules, the ability to charge only to 80 percent (which may
> > help lengthen battery life) required the company to blend of the
> > ranges achieved under 80-percent and 100-percent charging ...
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