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Post Your Battery Degradation Results

Posted: Sun Jun 23, 2013 9:15 am
by ELROY
With the ELM327 available now for everyone to use with their smart phones, we should make a compilation of the results from everyone. Showing the age/mileage of the car. General operation condition of the car (batt temps, mileage on car, DCQC?, frequent 100% charging?). I started logging my data. At first I was relieved that my battery capacity was 96.68% (64.06 AH) at the beginning of last month (May). However, here we are, not even at the end of June yet, and my capacity hasbeen steadily falling from the 96.68% down to 92.88% yesterday. (64.06AH down to 61.54AH). Kind of has me concerned, considering I have never DCQC the vehicle, charge to 80% most of the time, and live in relatively mild temperatures.

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Yesterday I went to test drive the Spark EV today at Bunnin Chevrolet. (Culver City). Took the drive there in the LEAF. Trip was 52 miles. Left with 100% charge...got there with 3 bars remaining, averaging 4.8mi/kWh..(27 mi on the GOM, 39.4% SOC on the ELM327). Charged at the Chevy Dealership for 3 hrs to get back to 9 bars. Only made it to 97 mi total trip with 1 bar remaining (4mi GOM, 18.6% SOC on the ELM327). So I had to stop in Thousand Oaks to charge for 1 hr to finish the 112 mi total trip. Odometer read 112 miles total when I got home. So here I am wishing that the LEAF had a little more range. I figured the FIT or the Spark with the extra range would allow me to make trips like this with less opportunity charging.


Running Forum Member Results List:

51.4 AH 48,918 miles, 91040 2011 LEAF (2yrs 1.5 months)
53.5 AH 19,500 miles. Stanton 2011 LEAF
54.07AH 30,455 miles mwalsh 2011 LEAF (29.75 months)
54.7 AH 28,310 miles HighDesert2011 LEAF (21 months) 79.31% capacity
55.23AH 32,745 miles ttweed 2011 LEAF (27 months) 83.36% capacity
56.7 AH 24,000 miles Boomer23 2011 LEAF
56.75AH 6,800 miles vrwl 2011 LEAF (12 months) 84.7% capacity
57.6 AH 21,000 miles opencar 2011 LEAF (2yrs) 86% capacity
57.8 AH 34,704 miles LEAFer 2011 LEAF (2.5yrs) 87.26% capacity
57.8 AH 5,918 miles rickbeckr 2011 LEAF (2.25yrs)
57.88AH 22,000miles tbleakne 2011 LEAF (2yrs, 3wks) 87.36 capacity
58 AH 19,500 miles. drees. 2011 LEAF (2yrs)
61 AH 3,500 miles LEAFfan 2013 LEAF (3 months)
61.5 AH 6,000 miles ELROY 2012 LEAF (8 months) 92.88% capacity
61.8 AH 10,900 miles dp Colorado 2012 LEAF (1 1/2 yrs)
62.5 AH 8000 miles GregH 2012 LEAF (5 months)
63.99AH 1400 miles lion 2013 LEAF (1 month) 98.15% capacity
66.02AH 13000 miles WetEV 2012 LEAF (13 months) (Leaf Logger)
67.36AH 7400 miles MarvG 2013 LEAF (4 months) 101.67% capacity
67.4 AH 4925 miles IraqiInvr 2013 LEAF (4 months) 101.67%

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 9:55 am
by TonyWilliams
ELROY wrote:Odometer read 112 miles total when I got home. So here I am wishing that the LEAF had a little more range. I figured the FIT or the Spark with the extra range would allow me to make trips like this with less opportunity charging.
Spark EV has a 3.3kW charger and no DC quick charge capability yet.
Fit EV has no DC quick charge capability (in the USA; it does in Japan).

All three will need plenty of recharging to go 112 miles, and only the LEAF (of your three examples) has DC CHAdeMO quick charge capability with over 2500 installed worldwide. LEAF also has optional 6.6kW charger.

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 10:50 am
by ELROY
TonyWilliams wrote:
ELROY wrote:Odometer read 112 miles total when I got home. So here I am wishing that the LEAF had a little more range. I figured the FIT or the Spark with the extra range would allow me to make trips like this with less opportunity charging.
Spark EV has a 3.3kW charger and no DC quick charge capability yet.
Fit EV has no DC quick charge capability (in the USA; it does in Japan).

All three will need plenty of recharging to go 112 miles, and only the LEAF (of your three examples) has DC CHAdeMO quick charge capability with over 2500 installed worldwide. LEAF also has optional 6.6kW charger.
I thought I was going to be impressed by the Spark, as did the Chevy, Salesman. Definitely more impressed with the LEAF. I posted my review:
http://www.mynissanleaf.com/viewtopic.p ... 70#p304803" onclick="window.open(this.href);return false;

Also, is my car losing almost 4% capacity since last month typical? Maybe I should get the reprograming done?

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 11:03 am
by DaveEV
ELROY wrote:Maybe I should get the reprograming done?
You should definitely have the reprogramming done.

If you expect to drive 80+ miles between charges with any regularity you need a car with at least one of the following characteristics:

1. 100+ mi EV range (RAV4EV, Tesla Model S)
2. QC with suitable infrastructure (LEAF, though unfortunately there are none currently on the route of your recent trip)
3. 30A L2 charging (quite a few cars qualify)

Back on topic, my car is currently around:

19.5k miles, 2 years since delivery
58 Ah

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 11:36 am
by dgpcolorado
61.86 Ah (from Leaf DD, should be the same CAN data)
One and a half years, ~10,900 miles

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 12:01 pm
by Stanton
53.5 AHr per LeafDD @19,500 miles.
I lost my first bar last month (May), but it seems as though I'm headed towards my second: am I wrong?
The "health" metric is @77%, which would also suggest I'm close to a second bar. However, I can get close to 70 miles @100% charge (and that's with some highway and A/C).

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 12:03 pm
by LEAFfan
AH-61 (rounded)
2013/4 Mos./3500 Mi.

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 12:25 pm
by ELROY
drees wrote:
ELROY wrote:Maybe I should get the reprograming done?
You should definitely have the reprogramming done.

If you expect to drive 80+ miles between charges with any regularity you need a car with at least one of the following characteristics:

1. 100+ mi EV range (RAV4EV, Tesla Model S)
2. QC with suitable infrastructure (LEAF, though unfortunately there are none currently on the route of your recent trip)
3. 30A L2 charging (quite a few cars qualify)

Back on topic, my car is currently around:

19.5k miles, 2 years since delivery
58 Ah
I left on my 112 mile trip with 100%. Did 4hrs of charging on the road, and it took another 5.5hrs to charge back to 100% when I got home. So a total of 9.5 hrs of L2 charging to achieve 112 miles with an overall efficiency of 4.1m/kwh. Although, on the way back I was driving 65-75mph on the fwy. (hence the drop from 4.8mi/kwh to 4.1mi/kwh)

Good stuff on the AH capacity. I started a running list on the 1st post with the results. This is good, because it tells me although it is alarming I had 64ah last month (which is excellent), my current 61.5 ah is still not out of align with some of the posted results.

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 12:44 pm
by dgpcolorado
LEAFfan wrote:AH-61 (rounded)
2013/4 Mos./3500 Mi.
Wow! That's a big drop for just four months. Phoenix heat strikes again.

Re: POST YOUR BATTERY DEGRADATION RESULTS

Posted: Sun Jun 23, 2013 1:05 pm
by 91040
6/22/13- 2nd bar loss.
Mileage- 48,918.
Ah- 51.48.
Owned 25.5 months.
Battery temperature has typically been 70F to ~90F for the last month.
Location is inland Los Angeles.