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Re: What SOC% does each bar on Leaf dash represent ?

Posted: Wed Sep 14, 2011 11:24 pm
by TonyWilliams
davewill wrote:I arrived there approx 2 miles into "Low battery"
So, you had, generally, 10-13 miles left...

I plugged in (L1) for an hour and a quarter... Ten miles and 400 feet down and back up, and I arrive at home.... I was expecting "Very Low Battery" any moment.
The L1 might have gotten you an additional 7-8 miles on top of the 10-13 you had, for 17-21 miles total. Then you drove 10. You had plenty of reserve !

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Thu Sep 15, 2011 11:56 am
by davewill
TonyWilliams wrote:The L1 might have gotten you an additional 7-8 miles on top of the 10-13 you had, for 17-21 miles total. Then you drove 10. You had plenty of reserve !
Yeah, I was never actually concerned, although I prefer to save the part below VLB as a "oops" reserve rather than depend on it at the start of a trip. I told the story to mainly show that the GOM gave me little useful information to help me do the trip.

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Thu Sep 15, 2011 12:07 pm
by davewill
surfingslovak wrote:Interesting! Would you happen to know what the trip energy economy (miles/kWh) was?
Sorry, I didn't reset the mpk for that sequence. 80% of the trip was spent going up and down hills anyway, so regen might have made quite a hash of the whole battery calculation. I assumed something around 4 mpk when figuring if I could make it, and assumed I could add 4-5 miles by plugging in. It was all surface streets, and I possibly did better.

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Thu Sep 15, 2011 3:35 pm
by GregH
surfingslovak wrote:
TonyWilliams wrote:My numbers are right in line with yours, and I've taken this car down to turtle 4 times to verify them. I use 81 miles of range estimate at 60mph, and 72 miles at 80% on my latest chart. The super important numbers (to me, anyway) are when you're down to below both any fuel bars and (thankfully) Guess-O-Meter numbers, and only have the Battery warnings to judge distance. I'm very confident, now, what distance I can go.
Tony, I took some liberty with your chart. It's speculative, but I think plausible. Have a look:

Image
Interesting.. On my car which only gets to 272# on a"full" charge, just today I saw the 12th bar go away at 250#, the 11th at 230# and the 10th at 214#... so I guess the "bars" are not absolutes..

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Fri Sep 16, 2011 12:02 am
by TonyWilliams
GregH wrote: Interesting.. On my car which only gets to 272# on a"full" charge, just today I saw the 12th bar go away at 250#, the 11th at 230# and the 10th at 214#... so I guess the "bars" are not absolutes..

Your car shouldn't get the same SOC number all the time. Do you ALWAYS get 272 on a full charge?

As more folks get SOC meters, hopefully we'll be able to correlate results and determine why. Thanks for posting your data.

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Fri Sep 16, 2011 8:53 am
by GregH
TonyWilliams wrote:Your car shouldn't get the same SOC number all the time. Do you ALWAYS get 272 on a full charge?
Ha! No! You're absolutely right.. I even started a separate thread... I want my 281! Lately the lowest I've seen is 271# and the highest 274#. The all time highest I've seen on my car was 280# but that was a while ago... The car is nearing 2000 miles and 3 months and rarely spends much time over 80% (or 225#) or under 20% (or ~50#)

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Fri Sep 16, 2011 12:48 pm
by kovalb
GregH wrote:Ha! No! You're absolutely right.. I even started a separate thread... I want my 281! Lately the lowest I've seen is 271# and the highest 274#. The all time highest I've seen on my car was 280# but that was a while ago... The car is nearing 2000 miles and 3 months and rarely spends much time over 80% (or 225#) or under 20% (or ~50#)
Batteries all deteriorate over time. LiIon deteriorates very rapidly at first but the rate of deterioration decreases greatly over time. The first year should be pretty noticeable, but after that much more stable. With 2,000 miles on it I would expect to see some deterioration -- this is no longer a brand new battery. It sounds like your battery "capacity level" is between 96.4% and 97.5% based on the numbers you posted. That is not bad at all. Most people will not be able to see their battery "capacity level" drop in such a granular manner because we only have the "capacity level" gauge just to the right of the SOC gauge (see owner's manual). I'm guessing it will be a year or two before anyone starts to see that gauge move off of 12 bars.

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Fri Sep 16, 2011 5:19 pm
by planet4ever
kovalb wrote:Most people will not be able to see their battery "capacity level" drop in such a granular manner because we only have the "capacity level" gauge just to the right of the SOC gauge (see owner's manual). I'm guessing it will be a year or two before anyone starts to see that gauge move off of 12 bars.
I do hope it will be longer than that, since the service manual says segment 12 turns off at 85% capacity.

Ray

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Fri Sep 16, 2011 5:21 pm
by Stoaty
planet4ever wrote:I do hope it will be longer than that, since the service manual says segment 12 turns off at 85% capacity.
When do the other bars turn off as capacity is reduced?

Re: What SOC% does each bar on Leaf dash represent ?

Posted: Fri Sep 16, 2011 6:32 pm
by planet4ever
Stoaty wrote:
planet4ever wrote:I do hope it will be longer than that, since the service manual says segment 12 turns off at 85% capacity.
When do the other bars turn off as capacity is reduced?

Code: Select all

bar turns off at
11  78.75%
10  72.5%
 9   66.25% 
 8   60% 
 7   53.75% 
 6   47.5% 
 5   41.25% 
 4   35% 
 3   28.75% 
 2   22.5% 
 1   16.25%
In other words, 6.25% per bar except the first one and "bar 0".

Ray