smkettner
Posts: 7313
Joined: Mon Aug 09, 2010 10:13 pm
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Location: Orange County, CA

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

Wed May 16, 2012 1:15 pm

TickTock wrote:Whoa, did I miss something? If I only set the end timer, will the car adjust the start time to finish at the set end time?

With end time only set, mine seems to start charging using the estimated hours shown on the dash. And of course the time shown is longer than actual.
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

Caracalover
Posts: 560
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Leaf Number: 0567
Location: Tujunga
Contact: Website

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

Wed May 16, 2012 10:59 pm

aqn wrote:I disagree. More information is always better. But that's just me. I encourage all high mileage (say, > 13K miles/year) LEAF owners to report battery capacity loss/non-loss, along with pertinent info: locale/temperature, charging habit, etc.

Bought my Leaf in March of 2011, now have over 16,000 miles on it, and have no noticable loss of capacity.

Monday through Sat. I charge to 80%, for the first 12 months on L1 primary.

Sunday I charge to 100% twice. I make a 70 mile one way trip over a mountain to the high desert, where temps get into the 100's, and lows get into the single digits. I have always made it to the destination, and I alter speed and heater use to do so without a low battery warning. Normal battery level at destination is just before or at the first low battery alert. Elevation is a factor on these trips, some 3000' or so.

I have no GID meter. Starting a second year of ownership I have not been able to discern any changes in the vehicle at all, but the software updates have made monitoring that a bit difficult. My one year battery check showed no issues.

I am careful not to top off the battery, always forcing the car to go below an 80% charge state before plugging it back in. This is not as easy as it sounds in some areas, but if you tromp on that 80KW motor, it can happen pretty fast, so hard braking and fast starts with the heater on is what it gets if I need the 100% but opted to go out to lunch at a close by eatery. Charging after just a 3 mile drive seems silly to me, just drive a bit slower if you need to, and even an extra 10 miles should not be an issue.

All of this talk about slow charging and fast charging hurting the battery seems silly to me also. Every Sunday I coast down a mountain and regen at the rate of 15 - 30 KW, which is like a fast charge from a 440 line, and I dare say most of you do it when you slow from highway speeds. I don't believe it hurts the battery beyond what one should expect from a battery.

Learning to care for your Leaf is what will make the difference in how long your car will last - just like owners that don't change filters in an ICE - it will have a long term consequence. How much of a consequence? Well that is what this forum is great for, and I hope my 2 cents helps in some way.
26,000 miles on Silver Leaf
wildcatzoo.org drive there on Sunday across a big mountain, sorry no public charging at this time.
Looking for grants to put in solar port so perhaps in the future...

mkjayakumar
Posts: 1219
Joined: Thu Mar 08, 2012 9:13 am
Delivery Date: 08 Mar 2012
Location: Plano, TX

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

Thu May 17, 2012 4:58 am

Re:.-1

Thanks for sharing your drive parameters and your experience. It is good to know that you are able to go 70 miles and climb 3000 ft on a single charge.

Questions:


- is this in CA?

- when you charge 100% in the morning, do you have it plugged in for a few more hours for the so called 'cell balancing'?

- how much do you charge for your return trip on top of the mountain? 80% or even less? Is that in L1 or L2 ? Where?

Thanks
Jay
2011 Leaf, 30K miles, returned after 24 month lease.
Currently leasing 2014 Leaf SV.

Herm
Posts: 3765
Joined: Sun May 23, 2010 3:08 pm
Delivery Date: 29 Aug 2012
Location: Timbuktu, Mali

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

Thu May 17, 2012 6:02 am

Caracalover wrote:All of this talk about slow charging and fast charging hurting the battery seems silly to me also. Every Sunday I coast down a mountain and regen at the rate of 15 - 30 KW, which is like a fast charge from a 440 line, and I dare say most of you do it when you slow from highway speeds. I don't believe it hurts the battery beyond what one should expect from a battery.


I agree with you, but why are you assuming that driving the Leaf in mountainous terrain wont hurt the battery life?

smkettner
Posts: 7313
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

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

Thu May 17, 2012 8:49 am

Flat highway is what ~1C discharge rate? Long hill might be an extended 2C discharge rate. Could make a difference if done every day as part of regular commuting.
Maybe no effect.
Last edited by smkettner on Fri May 18, 2012 8:38 am, edited 1 time in total.
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

Herm
Posts: 3765
Joined: Sun May 23, 2010 3:08 pm
Delivery Date: 29 Aug 2012
Location: Timbuktu, Mali

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

Thu May 17, 2012 10:29 am

C1 discharge is usually not considered strenuous, but 80kW full throttle is only 3.33C so perhaps its marginal. Volt runs up to 7C I believe, but the battery is actively cooled.

DarkStar
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Delivery Date: 25 Mar 2011
Leaf Number: 568
Location: Hillsboro, Oregon, USA
Contact: Website

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

Thu May 17, 2012 12:57 pm

smkettner wrote:Flat highway is what ~C1 discharge rate? Long hill might be an extended C2 discharge rate. Could make a difference if done every day as part of regular commuting.
Maybe no effect.

Herm wrote:C1 discharge is usually not considered strenuous, but 80kW full throttle is only 3.33C so perhaps its marginal. Volt runs up to 7C I believe, but the battery is actively cooled.

Before we get too far down this thread, I just wanted to note that it should be stated as "1C" or "2C." Less than 1C could be written as C/2 (for one-half C). ;)
Mikiko (2011 Nissan LEAF ETEC) Status:
Reserved: 04/20/10 | Ordered: 10/01/10 | EV Project Blink Installed: 03/22/11 | Delivered: 03/25/11 | VIN: 568

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turbo2ltr
Posts: 1376
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Leaf Number: 185
Location: Phoenix, AZ

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

Fri May 18, 2012 8:09 am

It's official.. Lost the bar today.

I find it incredibly hard to believe that so many people would loose the first capacity bar within what, 2 weeks? With such a vast range of mileage. Just doesn't make sense.

I charged to 100% last night after not charging for 3 days (did ~45 miles in 3 days mixed local and highway, had 4 bars and 28 miles on the GoM)

I got to 231 gids, and that (according to the data I collected when I first got the car) is also where an 80% charge stops. It's also a little higher than what I reported last time.

What really threw me off is when I lost one SOC bar, I initially thought the capacity bar came back as the two meters were level with each other again...but that wasn't the case after counting the bars. heh.

I do a long trip today, let see how it goes.

Man I wish I was tracking capacity this whole time so we could of had a degradation curve.
Silver SL-e
Ford F450 Crew Cab Hybrid Conversion

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mwalsh
Posts: 9623
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Leaf Number: 0213
Location: Garden Grove, CA

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

Fri May 18, 2012 8:21 am

I've got some oddities in the number of Gids/SOC reported by the Gidometer, and also with the miles available on the GOM. Both have been lower than previously encountered during the last couple of weeks. For example, I charged to just 80% last night and received only 201 Gids for my troubles. However, still no capacity bar loss, and I haven't seen a massive change in the protected range stilk available to me come the end of the day - just a marginal loss easily attributed to a more relaxed driving style from the more paranoid style I was using when I first got the car. Don't know what all that means.
2011 Blue Ocean SL with 80,000 miles
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RegGuheert
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Leaf Number: 5926
Location: Northern VA

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

Fri May 18, 2012 8:34 am

turbo2ltr wrote:It's official.. Lost the bar today.
That sucks. Thanks for letting us know.
turbo2ltr wrote:I find it incredibly hard to believe that so many people would loose the first capacity bar within what, 2 weeks? With such a vast range of mileage. Just doesn't make sense.
Has it been particularly hot over the past month?
turbo2ltr wrote:Man I wish I was tracking capacity this whole time so we could of had a degradation curve.
Perhaps it would be good to start now. I wonder if anyone in Phoenix has been tracking Gids over the past year.
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

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