----- Original Message -----
From: "brucedp5" <[email protected]>
To: <[email protected]>
Sent: Friday, February 22, 2013 6:10 AM
Subject: [EVDL] EVLN: EPA changed range calculation test procedures for
2013EVs
I wonder if the charging will work the other way for short distance driving
as I do for a LiFeP04 battery pack? About five days a week, I discharge to
98% SOC and only takes 7.5 minutes to charge for 1.2 miles and discharge to
90% SOC and only
takes 42 minutes to charge at 25 amps for 6.6 miles.
The battery temperature for 9 months out of the year is about 65 F degrees
and for the other 3 months the batteries may
range in temperature from 65 to 85 degrees.
The above calculation is for a 250 AH cell at 180 volt battery pack. If I
use a 100 AH LiFeP04 pack, the 1.2 miles may have a discharge to 95% SOC
and the 6.6 miles may discharge to 84% SOC. Once in a very great while, I
may use up to 50
AH from the battery which would be 50% SOC.
The LiFePo4 pack I am planning to use will be a 100ah 240 volt pack from
Manzanita Micro complete with battery boxes and
BMS which will be about 1000 lbs lighter then the existing pack making the
EV about 5600 lbs which may increase the SOC
a bit.
Roland
New 2013 Leaf EPA Test Anticipates 75-Mile Range
% Drivers opt to charge to 80% SOC to protect pack life %
http://www.greencarreports.com/news/1082456_2013-nissan-leaf-75-mile-range-anticipated-in-new-test-by-epa
[image] 2013 Nissan Leaf: 75-Mile Range 'Anticipated' In New Test By EPA
By John Voelcker Feb 21 2013
It's the last piece of information on the new and updated 2013 Nissan Leaf
electric car that everyone's been waiting for: its range.
The projected number, Nissan says, is 75 miles--but that shouldn't be
compared to the 73-mile range of the 2011 and 2012 Leaf models.
That's because the EPA changed the test procedures it uses to calculates
range for electric cars for the 2013 model year.
Before this year, the range estimate assumed a battery pack that was charged
to 100 percent of its capacity.
Many electric cars--the Nissan Leaf and Tesla Model S among them--offer
owners the ability to limit charge to 80 percent of capacity.
While this reduces range, it also prolongs battery life and takes
disproportionately less time, since the final 20 percent of a battery pack
tops off at a slower rate.
The EPA's new testing procedure averages the ranges achieved from an
80-percent charge (known as Long-Life Mode charging) and a 100-percent
charge (called Long-Distance Mode charging).
For the 2013 Nissan Leaf, the maker estimates those ranges to be 66 miles
and 84 miles respectively.
So comparing last year's apples to this year's gives a range improvement of
15 percent, from 73 to 84 miles--even though that's not what will appear on
the window sticker.
The improvement in apples-to-apples range is largely due, Nissan says, to
improvements in the Leaf's regenerative braking, reduced aerodynamic drag,
and a slightly lower vehicle weight.
So, the range of the 2013 Nissan Leaf is either 66 miles or 84 miles, or a
number somewhere in between--depending on how you charge the car.
The default charging on new 2013 Nissan Leaf electric cars is set to
Long-Distance Mode, though owners can easily reset that default to Long-Life
Mode.
Nissan notes that regardless of charging mode, its battery capacity
warranty--added in December after a few high-mileage Leafs in very hot
Phoenix lost notable battery capacity--guarantees that at least 70 percent
of battery capacity will remain after five years or 60,000 miles.
To give the battery its best shot at longest life, however, owners may elect
to charge only to 80 percent when they don't expect to travel more than 60
miles in a day--especially in the temperate climates where there's no winter
weather to reduce range below projections.
The official EPA range ratings should be released by early March, Nissan
says.
Meanwhile, it's permitted to put the projected range rating(s) on the window
stickers of the 2013 Leafs now being built in Tennessee and shipped out to
dealerships all over the U.S.
Prices for the 2013 Nissan Leaf start at $28,800 for the base Leaf S model,
rising to $34,840 for the SL model, plus a mandatory $850 destination fee on
all models.
The Nissan Leaf qualifies for a $7,500 Federal income-tax credit for the
purchase of a plug-in car, as well as various other types of state,
regional, local, and corporate incentives.
Nissan hopes the lower prices and improved range, performance, and equipment
level will boost Leaf sales in 2013 from their previous levels between 9,000
and 10,000 a year in 2011 and 2012.
We've long said, "Your mileage may vary"--will we now begin saying, "Your
range may vary"? ...
[© 2013 Green Car Reports All Rights Reserved]
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