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I want my 281!

Posted: Wed Sep 07, 2011 8:47 am
by GregH
SOC#/RAhC/wtf only got to 272 this am after I forced charge following the 80% overnight charge. I know early on I saw as high as 280 and lately it's been 274/275, but 272? This is going in the wrong direction. I see no evidence of cell balancing. This battery is rarely over 80% or under 20%, and while it is warm out, it's mostly sitting in a garage. How many people can now read pack voltage, current and SOC# on their Leaf? And how many of you still see 280/281 on a full charge?

Re: I want my 281!

Posted: Wed Sep 07, 2011 9:35 am
by 91040
The SOC meter has read 77.5% (218 raw) after my last two 80% charges. I am pretty sure a week or so ago, it read 80% and 80.4%.

It has been fairly hot here but the battery temperature still shows 6 segments. My hypothesis, based on my extensive Arts and Humanities background, is that the battery capacity has gone up with the heat and that the raw numbers are not constant. We can correlate this when we have access to finer battery temperature data. Meanwhile, I will be tracking the readings after charging.

Re: I want my 281!

Posted: Wed Sep 07, 2011 9:56 am
by Boomer23
I've been getting low SOC readings as well since I started using my new meter last week. I can't recall exactly, but I think I've been seeing between 272 and 274. It got my attention, too, since I was able to see 281 with Robert's development rig a few months ago.

Re: I want my 281!

Posted: Wed Sep 07, 2011 10:06 am
by garygid
I will do some testing here and report the SOC readings.

I am not yet aware of programming bugs in the SOC-Meter,
but ... it is possible. :)

Re: I want my 281!

Posted: Thu Sep 08, 2011 7:31 am
by lincomatic
I charged mine to 100% last night, and when I checked the it this morning, I got SOC = 270, 393.0V.
Mine's even worse! Where's my 281??

I was watching it charge last night, and watched it click over from 79.8% to 80.1%
At 80.1% (225), I had 390.0V

I normally charge to 80% except on Fri/Sat nights, where I charge to 100%.

Re: I want my 281!

Posted: Thu Sep 08, 2011 6:29 pm
by surfingslovak
I couldn't help noticing that the reports of relatively sudden drop in battery capacity were clustered geographically. AFAIK it's Southern California and Arizona. I'm wondering if there could be environmental factors at play, especially in the light of this ABC news article mwalsh referenced in another post. Could any of the posters confirm that it's been unusually warm in the past week or so?

Re: I want my 281!

Posted: Thu Sep 08, 2011 6:32 pm
by Boomer23
surfingslovak wrote:I couldn't help noticing that the reports of relatively sudden drop in battery capacity were clustered geographically. AFAIK it's Southern California and Arizona. I'm wondering if there could be environmental factors at play, especially in the light of this ABC news article mwalsh referenced in another post. Could any of the posters confirm that it's been unusually warm in the past week or so?
Yes, it's been hot, but nothing like Texas or AZ. Low 90s, maybe, and only for a couple of days.

Re: I want my 281!

Posted: Thu Sep 08, 2011 6:40 pm
by sparky
Boomer23 wrote:I've been getting low SOC readings as well since I started using my new meter last week. I can't recall exactly, but I think I've been seeing between 272 and 274. It got my attention, too, since I was able to see 281 with Robert's development rig a few months ago.
With my own "development rig" my 100% SOC normally varies between 272 and 280; I've never witnessed 281.
I've also noticed that the range is a bit better these last few weeks. Perhaps the warmer but not hot (< 95F)
conditions.

Re: I want my 281!

Posted: Thu Sep 08, 2011 7:05 pm
by Boomer23
Worst ever this morning:

100% charge beginning at midnight with no stop timer set, charged 5.0 hours, 18.6 kWh
12 bars
SOC #: 257
SOC %: 91.4
Total miles: 4,464
Car's age: about 5.3 months
Daytime temp yesterday, low 90s

Re: I want my 281!

Posted: Thu Sep 08, 2011 7:20 pm
by evnow
I've been geting 276. I once got 279.

But my 80% charges have all been 231.

Anyway after 100% charge the SOC meter goes down so fast, it hardly matters whether we get 276 or 281.