Tuesday, December 4, 2018

November 2018 Drive Report; Its Winter Which Means The Beginning Of "IceGate"

The expected rush at work has not materialized which is fine by me. We had one pretty busy week but things have settled down a bit and yes, I am enjoying the extra time off!  As is the norm, Winter means more staying at home, gorging on comfort food, wrapped in a blanket while taking full advantage of my Netflix subscription.  In previous years, work forced me to drive a lot but that is no longer an issue as my 24 mile RT commute means a 75 min charge every morning is more than enough to last the day!

The Stats

LEAF drove 927.6 miles costing me $7.71 on the power bill or .83 cents per mile helped out by 153.788 kwh from NCTC at zero cost.   Without NCTC, my cost would have been $20.93 or 2.26 cents per kwh.  There was a rise in my power bill going from 8.5 cents/kwh to 8.6 cents/kwh. Rounding?? Either way, it was an acceptable outlay of cash. There was a milestone reached when adding in the $7.71 in public charging fees to my home electricity costs to put me over the $100 mark for the LEAF over the first 13½ thousand miles or so.  Getting expensive...

The Battery

Well, its another one of those months when the BMS did not do any resets or calibrations. I lost .05% SOH during the month.  Now will have to say, I have continued my goal of keeping SOC fairly low. During the 4 day work week, I always have enough to drive one sometimes two days before needing a charge but on the last 2 or 3 days of the week, I plug in when I get up in the morning and unplug when leaving for work which means about 75 mins of charging a day. This keeps my SOC between 25-45% more or less but also keeps my pack fairly cold. The batts have pretty much been in the low to upper 50'sº F for the most part.  I would post my extrapolated degradation prediction but I think I will wait till Jan to do that in case an adjustment does pop up like it did in October.  But month ending numbers

Ahr; 109.31
SOH; 94.68
Hx; 117.97

As far as noticable range loss, that is a tough question so can only extrapolate from yesterday (SOC was up to 84%) and yeah, I know that would be December stats but...no one's perfect, right! :)

I would have roughly 162 miles of range. Now that is a very rough estimate and GOM based on city/suburban driving along with a lot of heat. (It has been FRIGID here!)


Well, it didn't take long for me to notice my knee (the point when DCFC stops providing max amperage on a charge) was plunging almost as fast as the Mercury!   The other day, I recorded a knee at 45%!  Granted batteries were cold so repeated the charge a few days later getting similar results on the first charge but seeing a knee at 61.1% on the 2nd when pack was warmer (80º verses 55º)

As always, I will dissect the logs for specifics, collect several more charges and report back here.


Finally, a news agency has reported the eLEAF will launch in January at the CES in Las Vegas. Rumors state no liquid cooling. I am very much ok with that. During my visits to Nissan World HQ, they were pretty adamant in stating that liquid cooling opened up risks to the driver they were not willing to take on.  Now a well designed heat exchanger using using conditioned air in Summer and cabin air in Winter that also assists with cabin warming would be the way to go.

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