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

Wed May 09, 2012 2:23 pm

klapauzius wrote:In any case, I am still hoping this is an outlier, but it leaves an unpleasant feeling. Adding to range anxiety, we now have capacity anxiety as well...seems like EVs are not for those faint of heart :D
Personally, I'm pretty sure that this is an outlier. Battery health and degradation have been discussed at great length on this forum going back to 2010. Yes, this new case is disconcerting, but unless we see this with much greater frequency, there is no need to get nervous about it. The vast majority of us will be fine, and aside from the occasional module replacement, these batteries should prove to be more robust than we thought possible.

What I found interesting is that all the known cases of what could be described as premature battery aging were clustered in and around Phoenix, AZ. It would be good to have some organized way of collecting and keeping data from a few hundred owners.
Last edited by surfingslovak on Wed May 09, 2012 2:37 pm, edited 1 time in total.

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

Wed May 09, 2012 2:32 pm

The 5-Star Report seems to be primarily a battery Usage/Charging
Statistics summary, not really deeived from any Battery Testing.

The Capacity bar at the top appears to be just
the Capacity Bars that one can see in the car.
In other words, NO information until AFTER the car has lost
a very significant part (15%) of its Pack capacity.

If Pack Capacity and Health are "measured" at all, it would seem
likely that the readings are only seen by Nissan, not the Dealer.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
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EdmondLeaf
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Re: Lost a "high-voltage battery status" bar, down to 11

Wed May 09, 2012 2:37 pm

surfingslovak wrote:What I found interesting is that all the known cases of what could be described as premature battery aging were clustered in and around Phoenix, AZ. It would be good to have some organized way of collecting and keeping data few hundred owners.
I am sure there is one person somewhere around Austin that reported more then normal capacity loss

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

Wed May 09, 2012 2:38 pm

EdmondLeaf wrote: I am sure there is one person somewhere around Austin that reported more then normal capacity loss
Interesting, thank you! Would you know how much approximately, and how old the car might have been?

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

Wed May 09, 2012 2:39 pm

I can't speak for azdre's car, but TickTock's and mine were left for almost three months (mine was end of Mar.-beginning of June) in the LA port and who knows how the battery pack could have been abused. I'm going to try and make an appt. before my battery pack check is due. I'll try to get the capacity reading and the bad cells/module if I can.
2013 LEAF SV Del. 2/28/13
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smkettner
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Re: Lost a "high-voltage battery status" bar, down to 11

Wed May 09, 2012 2:41 pm

garygid wrote:The 5-Star Report seems to be primarily a battery Usage/Charging
Statistics summary, not really deeived from any Battery Testing.
Not disagreeing with you and I want to add I think it is just a white washed report and the real purpose is to collect proprietory data for Nissan.
Serves very little use to the consumer.
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
RAV4 traded in for I-Pace Dec 2018

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

Wed May 09, 2012 2:43 pm

surfingslovak wrote:Interesting, thank you! Would you know how much approximately, and how old the car might have been?
mckemie wrote:I just charged to 100% after receiving my SOC meter a few ways ago. 256. Slightly alarming. Range has always seemed acceptable. We now have 14k miles and charged to 100% for the first 10-12k miles. Then, it dawned on me that 80% would suffice for most of our trips. We now charge to 100% only about once a week. Indicated range (trip distance plus SMRD reading) is 90-95 miles on a full charge. That makes maximum range (to turtle) 95-105 miles.

If the gid really represents energy in the battery, I am 10-12% low.
http://www.mynissanleaf.com/viewtopic.p ... &p=187861#

delivered 5/24/11

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planet4ever
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Location: Morgan Hill, CA, south of San Jose

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

Wed May 09, 2012 3:03 pm

azdre wrote:* We do 'top it off' a lot. That's the one item we got 4/5 stars on the battery check in March 2012.
I'm not sure what your definition of that is, but you might have run afoul of one of the specific warranty exclusions:
This warranty does not cover damage or failures resulting from or caused by:
  • ...
  • Charging the lithium-ion battery full on a daily basis despite the lithium-ion battery keeping a high state of charge level (98-100%).
Ray
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.

azdre
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Location: Phoenix, AZ

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

Wed May 09, 2012 3:20 pm

planet4ever wrote:
azdre wrote:* We do 'top it off' a lot. That's the one item we got 4/5 stars on the battery check in March 2012.
I'm not sure what your definition of that is, but you might have run afoul of one of the specific warranty exclusions:
This warranty does not cover damage or failures resulting from or caused by:
  • ...
  • Charging the lithium-ion battery full on a daily basis despite the lithium-ion battery keeping a high state of charge level (98-100%).
Ray
Interesting. I don't think that is an issue though. It's always at least 10% depleted when we plug in. There's no trip we take that's less than 10 miles. And those 10-20% top-offs that I speak of are relatively infrequent, once a week at the most.

The thing that does concern me with this statement is that the Blink will sometimes (less now than it used to) just run a 2-5 minute charge in the middle of the night for no reason. I elect to get a text message when the car stops or completes charges and sometimes I'd wake up with 2 or 3 charge complete messages.

One of the main reasons I like to remain plugged in is so I can take advantage of pre-cooling and heating while connected. I'm not sure how Nissan intended we do this if we're not supposed to be plugging in when the SOC is above 80%.

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planet4ever
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Re: Lost a "high-voltage battery status" bar, down to 11

Wed May 09, 2012 3:28 pm

LEAFfan wrote:The first bar doesn't disappear until you've lost 15%. So this doesn't sound "gradual" to me. 2% sounds gradual.
People are probably getting tired of me saying this, but please, folks, go check a dictionary. "Gradual" does not mean "slow". If you were losing 1% of your battery capacity every week, that would be very rapid loss, and you would be down a capacity bar in less than four months, but it would still be gradual. If you suddenly lost 10% of your capacity you would still have 12 capacity bars, but that would not be gradual. Gradual means "a little bit at a time." If the battery cells get weaker over time, that is gradual. If some cells suddenly fail, that is not gradual.

Sudden failure is covered. Losing capacity a little bit every day is not covered, no matter how fast it happens. I'm sure any court will uphold that as the proper interpretation of the word "gradual".

Ray
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.

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