Malm
Posts: 449
Joined: Mon Jul 22, 2013 12:16 pm
Location: Tábua - Portugal

Re: Maximum Range Remaining

Sat Jul 25, 2015 2:51 am

I still think the formula that the car uses to get the mRR, have a maximum value, and that is 109 miles. For that, your car should be able to use the maximum capacity (close to 16 kWh), temperatures in the battery should be over 25°C, and you have to do the last 20 km at less then 100 wh/km.

It's very difficult for most of you to get that number, because the car, even when it's new, don't use all capacity avaliable.
Riding an i-Miev since 4/2011 in Portugal, 100.000 kms.

PV1
Site Moderator
Posts: 2929
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: Maximum Range Remaining

Mon Aug 15, 2016 7:27 pm

New personal record of 96 miles RR :mrgreen: . I was honestly surprised by this as the previous 15 miles included driving through very heavy rain, sitting in a parking lot for half an hour with the A/C on MAX, and some highway driving, all with A/C on. The only thing I can figure is rolling resistance is very low above 90 F (as I've been getting almost 4.5 miles/kWh measured at the wall these last couple of weeks).

Pic to prove it:
https://www.dropbox.com/s/7lwf4e5kx7mkp ... 2.jpg?dl=0
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

Malm
Posts: 449
Joined: Mon Jul 22, 2013 12:16 pm
Location: Tábua - Portugal

Re: Maximum Range Remaining

Tue Aug 16, 2016 8:58 am

Still far from the 109 miles record, or the maximum number that the display can show you - 175 in km. Only that number will impress me. :)
Riding an i-Miev since 4/2011 in Portugal, 100.000 kms.

JoeS
Site Moderator
Posts: 3537
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: Maximum Range Remaining

Tue Aug 16, 2016 10:48 am

PV1 wrote:New personal record of 96 miles...
At 155km it looks great to me!
Malm wrote:Still far from the 109 miles record, or the maximum number that the display can show you - 175 in km. Only that number will impress me. :)
Aw, Malm, give the guy a break, and it is certainly one of the better recent RR postings - and on a pack that's over a year old. :mrgreen: You've identified that limit previously, how do you know it is 175km (109 miles), other than being unable to beat it yourself? :P
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

Malm
Posts: 449
Joined: Mon Jul 22, 2013 12:16 pm
Location: Tábua - Portugal

Re: Maximum Range Remaining

Tue Aug 16, 2016 11:35 am

Only two, that we know about, reached that number. In hundreds of users, only two reached over 170 km, and both stopped at 175 km (seems the odds are in my favor). I believe for these two guys the car offered the possibility of using all the energy from 4,105V to 2,750V lower cell voltage, when the car was in the beginning of its life. For all the other users, when new, the car will stop at 3,6/3,5V lower cell voltage, so no way it will let you get 175 km of mRR. Maybe one of these days appears a new guy in the block, but for now it appears no one has a special i-MiEV like us. Yes, I believe you need a special i-MiEV to reach 175 km, and there are two possibilities: the inicial capacity is stated to get the 175 km number, by someone who have the knowledge and the means to do that, or the car, after some use, calibrates its capacity to an higher number then the inicial one.
The second happened to me.

So, I'm very confortable that this is the maximum number we can get, and it will be very difficult to see more guys going over 170 km.
Riding an i-Miev since 4/2011 in Portugal, 100.000 kms.

Don
Site Moderator
Posts: 2733
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: Maximum Range Remaining

Tue Aug 16, 2016 11:42 am

I still believe that if you drove it 100 miles down the side of a mountain at 30 mph starting at say 15,000 feet and ending at sea level you would wind up with an RR of at least 150 or 175 miles after a full recharge

NONE of the really high reported RR's impress me very much because we all know what gives you really high and/or really low RR numbers and how to get them . . . . But PV1's 96 miles in what appears to be normal, everyday driving and with the A/C on all the time is certainly the most impressive number I've ever read about here on the forum, bar none! Way to go!!

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

PV1
Site Moderator
Posts: 2929
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: Maximum Range Remaining

Tue Aug 16, 2016 12:14 pm

Thanks, Don!

I'm still curious on the algorithms used to calculate the RR values. We know the factors that alter it, and we also know that activating heat or A/C changes the RR reading, but I'm still wondering if there would be a difference if one drove the exact same 15 miles, once with A/C on, and once with it off. It must be keeping A/C usage separate from motive power, so that even if you do drive the last 15 miles with heavy HVAC usage (like I did), it will ignore that when giving you a reading with the HVAC off (as it was when I started the car after charging) and only consider 12v and motive power consumption.

The i-MiEV continues to amaze.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

Malm
Posts: 449
Joined: Mon Jul 22, 2013 12:16 pm
Location: Tábua - Portugal

Re: Maximum Range Remaining

Tue Aug 16, 2016 12:42 pm

Don wrote:I still believe that if you drove it 100 miles down the side of a mountain at 30 mph starting at say 15,000 feet and ending at sea level you would wind up with an RR of at least 150 or 175 miles after a full recharge

NONE of the really high reported RR's impress me very much because we all know what gives you really high and/or really low RR numbers and how to get them . . . . But PV1's 96 miles in what appears to be normal, everyday driving and with the A/C on all the time is certainly the most impressive number I've ever read about here on the forum, bar none! Way to go!!

Don


They speak, speak, speak and just see they doing nothing. If you want to have a number that deserves attention, make it 109 miles.
Riding an i-Miev since 4/2011 in Portugal, 100.000 kms.

PV1
Site Moderator
Posts: 2929
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: Maximum Range Remaining

Tue Aug 16, 2016 12:49 pm

Challenge accepted.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

mdbuilder
Posts: 227
Joined: Wed May 18, 2016 6:05 am
Location: Great Mills, Md.

Re: Maximum Range Remaining

Tue Aug 16, 2016 1:43 pm

I agree with the AC part, prior days AC usage has no impact on the next days beginning value. It instantly changes the reading as you turn it on or off but is a separate item.
2015 Nissan NV200
2012 I-Miev SE Premium
2009 Mazda 5
2017 Toyota Prius Prime

Return to “Driving the iMiev - Range - Energy Efficiency - Operating Cost”