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garygid
Gold Member
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Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

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

Wed May 09, 2012 12:40 pm

Also, how does one get the Cell-Pair voltages
and the internal resistance readings at 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
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

EdmondLeaf
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Location: Edmond, OK

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

Wed May 09, 2012 12:47 pm

Anyone here to lend SOC meter for a week or so?

smkettner
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Location: Orange County, CA

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

Wed May 09, 2012 1:19 pm

How many battery temperature bars during the long 100% storage?
Are you at the top of the battery temp scale when you top off?
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

azdre
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Joined: Fri Sep 03, 2010 7:28 am
Location: Phoenix, AZ

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

Wed May 09, 2012 1:26 pm

smkettner wrote:How many battery temperature bars during the long 100% storage?
Are you at the top of the battery temp scale when you top off?
I've never seen anything unusual with the battery temperature. Mid-range always. I was out of state for the month of storage, so I have no way of knowing what the battery temperature was during that time. I'm also not sure that it was at 100%, it could have been less, it wasn't really a priority for me at the time. We were told the car could handle the storage, and when we came back it had lost next to nothing. We did remove it from the Blink, because at the time, the Blink was pretty buggy and didn't want the car attached to it unattended for such a long time.

It was a very mild May last year, so in the garage it probably got no warmer than 90 degrees during the worst day.

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

Wed May 09, 2012 1:35 pm

Azdre, I have an SoC gauge. Just let me know if you want to use it to check your SoC%.
2013 LEAF SV Del. 2/28/13
2013 LEAF World Record for Most Miles Driven On One Charge-188 miles/8.8 m/kW h
4.8 kW DC PV ($ .91/W fully installed)/ Dec., 2010

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

Wed May 09, 2012 1:38 pm

If your car was at 100% and unplugged for a month it did not sit at 100% for the entire month. Do you remember the SOC when you checked it at the end of that month? Regardless if sat at 100% a long time. I suspect those in cool climates will have much longer pack capacity life.

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TRONZ
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Location: Denver, CO

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

Wed May 09, 2012 1:47 pm

What is the recommended SOC level for going on a vacation??? We will be away for a week next month and I was thinking of just parking it at about 60%.
Every start, is as good as any start can ever be. - Douglas Darden

Stats;
2011 LEAF SL VIN#202, Delivered 01.30.11. Now, by far, the oldest LEAF in Colorado.

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

Wed May 09, 2012 1:57 pm

TRONZ wrote:We will be away for a week next month and I was thinking of just parking it at about 60%.
TRONZ, that should be fine. Be sure to unplug the car though, and try to park it somewhere where it doesn't bake in the hot sun all day.

adric22
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Leaf Number: 000768
Location: Fort Worth, TX

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

Wed May 09, 2012 2:03 pm

Everybody should keep something in mind.. I do not believe the energy loss of the battery is linear. For example, if you loose 10% the first year then you may have lost 10 miles of range. But if you loose another 10% the next year, you would loose another 9 miles, the next year you'd loose maybe 7 or 8. You get the idea. I'm not saying this is exactly how it works, but I wouldn't expect to loose 15 miles of range every year. If you did, the battery would be completely dead in 6 or 7 years... But would be nearly unusable long before that.

Of course, at some point or another, you'll have a cell or two that just flat out die, then the car will quit working.

I've also wondered about how the Leaf measures capacity loss. For example, if you are now at 85% total capacity, then does that just mean the weakest cell in the pack is at 85%, but other cells may be higher?
2013 Blue Nissan Leaf SV
2012 Summit White Chevy Volt

klapauzius
Posts: 1658
Joined: Thu Feb 24, 2011 4:19 pm
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Leaf Number: 0197
Location: Seattle, Wa

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

Wed May 09, 2012 2:08 pm

we have bunch of forum members with similar mileage/age, so this seems to be somewhat unusual. Or we will see a string of more posts like this pop up in the near future?
It would be nice to make a list, where we systematically collect data on this. I.e. age of the battery at first bar loss, mileage, average high (summer) storage temperature and charging habits (i.e. 80%/100%).

it seems to me that Nissans battery health test is pretty meaningless, if a case like this would still show up as 5 stars? I dont want to know what the loss rate of a 4 star or less test would be....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

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