EdmondLeaf
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Re: Lost a "high-voltage battery status" bar, down to 11

Thu Jun 07, 2012 6:43 am

Steve, I am satisfy with result you got. Do it again on timer to 80% in the evening, and the override, and measure in the morning, my calculation was based on ratio between to ideal numbers 231 and 281

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RegGuheert
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Re: Lost a "high-voltage battery status" bar, down to 11

Thu Jun 07, 2012 6:43 am

Cheezmo wrote:Hmm... I got 271.
Do you know when your car was manufactured? You might see that reported on a service receipt...
RegGuheert
2011 Leaf SL Demo vehicle
10K mi. on 041413; 20K mi. (55.7Ah) on 080714; 30K mi. (52.0Ah) on 123015; 40K mi. (49.8Ah) on 020817; 50K mi. (47.2Ah) on 120717; 60K mi. (43.66Ah) on 091918.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

cyellen
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Leaf Number: 0613

Re: Lost a "high-voltage battery status" bar, down to 11

Thu Jun 07, 2012 10:07 pm

OK...count me in. Lost a bar today...like the rest, down to 11.

I've been a diligent 80% charger since day one, seldom charge more than once daily, occasionally do 100% on the weekends. Thank heavens I leased:-)
Glacier White SL-EV delivered 3/23/2011 in Phoenix, AZ
VIN: 000613
EVProject Participant: Blink installed 3/21/2011

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surfingslovak
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Re: Lost a "high-voltage battery status" bar, down to 11

Thu Jun 07, 2012 11:09 pm

cyellen wrote:OK...count me in. Lost a bar today...like the rest, down to 11.

Welcome, number eight! I see that you are in Phoenix, and it's a white Leaf. Are white and red the most popular colors there, would you know?Image

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Ingineer
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Re: Lost a "high-voltage battery status" bar, down to 11

Thu Jun 07, 2012 11:46 pm

LEAFfan wrote:
Herm wrote:LBW is at the 8.5% SOC point?


No, LBW is at 17.4% on the BCM or Gid meter. VLBW is at 8.5%. Turtle varies between 1.4% and 2.4% depending on speed.
I'll go on my usual tirade again saying that Gids cannot be used to accurately calculate SoC. So far nobody anywhere (except maybe Nissan Engineers or those with beta LEAFSCAN units) can really read SoC. People should avoid the use of gid-based SoC, as once the true SoC is available, this real number is not going to match what Gidmeters report.

-Phil
Last edited by Ingineer on Fri Jun 08, 2012 12:00 am, edited 1 time in total.
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Ingineer
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Re: Lost a "high-voltage battery status" bar, down to 11

Thu Jun 07, 2012 11:54 pm

RegGuheert wrote:I believe that 1 GID is 0.33333% of the NEW capacity of your battery such that a charge to 300 GIDs when new would equal a 100% charge. Also, at 80 Wh/GID, 300 GIDs equals 24 kWh. As Ingineer has told us, the 100% setting is really 93.6% of the total. That is why a new LEAF has 281 GIDs with a 100% charge.

Based on this belief, I would say TickTock's 80% charge ending at 183 means that he has 61% of his toal new battery capacity when he charges to 80%. When he charges to 100% (93.6%) he has 74.6% of new capacity. Both numbers are approximately 19% lower than what would be expected from a NEW LEAF battery.

ETA: This makes a little more sense if you figure an 80% charge is 232 GIDs. That equals 77.3% of full, not 80%. Now the ratios for TickTock's readings are correct: 61/77.3=74.6/93.6=79%

ETA2: If that 79% number is correct, he is close to the second bar, which is at 78.75% IIRC.
A charge set to 80% stops at 80% SoC (real SoC, not what Gidmeters report), whereas a "full" charge usually is stopped from 94-95% SoC. So the difference is only ~15% of the total pack capacity. A charge to true 100% SoC would give you about 24kWh, but the battery ECU is more interested in making the pack last long, (or at least attempting to, Sorry Phoenix!) so it never allows that truly "full" charge.

Packs that routinely see 80% charges are usually more out of balance, so the initial full charge is usually less than even 94% until it gets a chance to rebalance. This will also make a full-charge Gid reading artificially low. For those attempting to assess capacity with Gids, several full charges in a row may be needed to peak your Gids to the real level.

-Phil
Last edited by Ingineer on Fri Jun 08, 2012 2:56 am, edited 1 time in total.
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Ingineer
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Re: Lost a "high-voltage battery status" bar, down to 11

Fri Jun 08, 2012 12:02 am

One other factor to consider, is that it appears that a hot pack will not fully charge. I've noticed on a few occasions less charge if my pack is warmer than normal.

So it may very well be that when it cools off some lost "capacity" will return, though unfortunately I don't expect cars with lost capacity bars to regain them.

-Phil
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Stoaty
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Re: Lost a "high-voltage battery status" bar, down to 11

Fri Jun 08, 2012 6:20 am

Ingineer wrote:Packs that routinely see 80% charges are usually more out of balance, so the initial full charge is usually less than even 94% until it gets a chance to rebalance. This will also make a full-charge Gid reading artificially low. For those attempting to assess capacity with Gids, several full charges in a row may be needed to peak your Gids to the real level.

Very interesting. Where did you get this nugget? Beta Leafscan feedback? :D
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DaveinOlyWA
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Re: Lost a "high-voltage battery status" bar, down to 11

Fri Jun 08, 2012 7:19 am

Stoaty wrote:
Ingineer wrote:Packs that routinely see 80% charges are usually more out of balance, so the initial full charge is usually less than even 94% until it gets a chance to rebalance. This will also make a full-charge Gid reading artificially low. For those attempting to assess capacity with Gids, several full charges in a row may be needed to peak your Gids to the real level.

Very interesting. Where did you get this nugget? Beta Leafscan feedback? :D


have seen AND reported the same thing. i dont even do 80% charges. i simply plug in a few hours a day every few days or so. but do do 100% every so often to check my GID count. and yesterday it was 272 which is lowest ive seen, but it normally takes me 2-3 charges to 100% to get back to my 280

now i did not charge to 100% today since i only drove 25 miles yesterday and figure to do about the same today. but due to possible concerns over permanent loss i will charge to 100% for tomorrow to see where i am at
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 15,000 miles, 478 GIDs, 37.0 kwh 109.81 Ahr , SOH 94.61, Hx 120.15
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cyellen
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Re: Lost a "high-voltage battery status" bar, down to 11

Fri Jun 08, 2012 8:21 am

So here's my question...should I do anything? I assume the dealer cannot do anything about it, right? I never needed all the range (with some exception of course), so I am not worried (yet). I hate the fact that there is anything "negative" about my EV experience, but the sky isn't falling and I don't want to make a mountain out of a molehill (after all, everyone knew the battery wasn't going to last forever).

I assume someone from Nissan reads this and is counting like the rest of us, right?
Glacier White SL-EV delivered 3/23/2011 in Phoenix, AZ
VIN: 000613
EVProject Participant: Blink installed 3/21/2011

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