mtndrew1
Posts: 296
Joined: Thu Oct 16, 2014 3:06 pm
Location: Los Angeles, CA

Re: Battery Ageing Model

Mon Jul 10, 2017 8:49 am

Did a 100% - 2% - 100% cycle yesterday.

Current numbers:

MIN 12.6%
MAX 15.0%
CEC 14196
CED 13584
MAX CELL# 3
MIN CELL# 19

ODOMETER 41649 MILES / 67028 KM

SoulEV2016
Posts: 568
Joined: Mon Jul 18, 2016 6:26 am

Re: Battery Ageing Model

Tue Jul 11, 2017 11:53 am

Update from my car :

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Kia Soul EV 2016 Ultimate 27 kWh - Mountain hard driving (fast). Drain 1/3 of Battery after 32km. - Unlimited highway speed (153km/h at regulator).

Tom
Posts: 30
Joined: Sat Jul 18, 2015 1:37 pm
Location: Switzerland

Re: Battery Ageing Model

Wed Aug 02, 2017 3:52 am

Still collecting numbers?

Max. Det. 7.5% , Cell #2
Min. Det. 6.5% , Cell #25

Batt. tmp. 27 °C (and it is sommer here)

ODO close to 30'000 Kilometer

Drive/SOC habitats:
I do not force the car really and drive in ECO mod 99% of the time
Usually exept for balanceing once a moth or so do not charge over 80% (more in winter when I need 100% for the roundtrip (selden).
I leave the car parked never with any SOC below 20% (usually 25%).
Charge a lot 50kW DC and drive it often to arround 13% SOC (in winter sometimes even to arround 8%) direct to the 50kW DC station and load up to arround 75% usually.
I drive and charge so my battery is not getting warmer then 40°C.
KIA Soul EV with vented seats and Chademo
Until July 2015 i-MiEV 13'500km
Summer 2015; Sold my all year arround used Cadillac Seville STS

SoulEV2016
Posts: 568
Joined: Mon Jul 18, 2016 6:26 am

Re: Battery Ageing Model

Fri Aug 11, 2017 6:45 am

Update.

Image
Kia Soul EV 2016 Ultimate 27 kWh - Mountain hard driving (fast). Drain 1/3 of Battery after 32km. - Unlimited highway speed (153km/h at regulator).

JejuSoul
Posts: 1028
Joined: Wed Jul 08, 2015 6:47 am
Location: Jeju
Contact: Website

Re: Battery Ageing Model

Mon Aug 14, 2017 7:52 am

Tom wrote:Still collecting numbers?
Yes. I'm still collecting the numbers. Thanks for posting them.
All of the cars participating in the collection of data on this thread are doing well. No major battery problems.
For instance my car is over 2 years old, has driven nearly 40,000km and is still at SOH = 100%. I am nearing the end of the 10% buffer, so I expect to begin to see a small decrease in range over the next year.

But there are now plenty of stories of massively decreased range, battery failure and / or severe battery degradation leading to battery replacement on other threads. We have very little data on these failed cars, so we can't really say why.

An example is here - Evie zeroed out at 53 miles and UPDATE!! Evie's battery replacement complete!
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.

JejuSoul
Posts: 1028
Joined: Wed Jul 08, 2015 6:47 am
Location: Jeju
Contact: Website

Re: Battery Ageing Model

Wed Aug 23, 2017 8:00 pm

-
Yet another case of sudden degradation of the battery in California requiring battery replacement. Is this 6 cases now?

From last week -
71.2%. Decreased from 79.6% down to 71.2% over 3 weeks. Still does not meet the threshold for a battery warranty, but the dealership kept the car and said they will talk to Kia tomorrow because of the rapid battery deterioration.
see comment on Facebook Forum

This week the car is below 70% and the battery replacement is authorised.
Sudden degradation like this is presumably cell failure or a faulty BMS. But these problems do seem very common.

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Here in Korea there are two similar cases.

First - this car SOH = 62.7% is waiting for the battery replacement.

Image

Second - this car SOH = 79.8% went in to get checked in July.
By August the SOH was 72%. Kia initially said yes, then refused.
I assume the 70% value will be hit next week.

Image


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I don't have many details on how these cars were driven, or any long term battery data. So as yet no conclusions as to why these cars are failing, but none of the cars we are monitoring are. As a point of reference 10 of the 20 cars we are measuring battery data for have had an OBC replacement. Am guessing that the OBC error is randomly distributed and that it has occurred about half the time in cars 2 or 3 years old. Battery failure however is either very rare or is not randomly distributed. Am guessing the latter. Am assuming it is something similar to this - see viewtopic.php?p=7277#p7277
biffidum wrote:Just in case people start to panic reading the above. There are a couple of things you should know.

1). The OP has 67,000 miles (107,000kms) on a car that is just over a year old.

2). They seem to charge extensively on a rapid c harger (level 3)

Obviously lots of highway driving being done and rapid charges.

This is extreme for any electric car. An EV is ideal for around town with some highway. The higher current draws from highway will (depending on average speed) accelerate battery degradation. Couple this with the higher amperage push on a level 3 c harger and you have a recipe for even more degradation. If you combine both of these activities frequently (long trips) you are Definitely going to see accelerated battery degradation.

These are city cars not cross country commuters...


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To add to the list of battery failures leading to replacement. This 2015 car in Quebec - 110,000km. see Presque trois ans et des maux de tête...
Last edited by JejuSoul on Fri Sep 22, 2017 10:25 pm, edited 1 time in total.
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.

teirhy
Posts: 11
Joined: Sun Feb 19, 2017 12:14 am

Re: Battery Ageing Model

Tue Sep 12, 2017 2:30 pm

2 years, 45 000 km :

Image

JejuSoul
Posts: 1028
Joined: Wed Jul 08, 2015 6:47 am
Location: Jeju
Contact: Website

Re: Battery Ageing Model

Thu Sep 14, 2017 8:50 am

teirhy wrote:2 years, 45 000 km : SOH = 102.2%
teirhy - thanks for the data.
Your car is doing well - slightly better than mine. (2 years, 40 000 km : SOH = 101.7%)
Also good recent data from Elmil here - viewtopic.php?f=6&t=677&start=30#p7335
(2 years, 75 000 km : SOH = 99.7%)

There is an interesting poll on the N issan L eaf sister site - Poll : Number of miles before losing the first bar

Image

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Here's the official SOH for my car at recent service

Image
Last edited by JejuSoul on Wed Sep 20, 2017 7:43 pm, edited 1 time in total.
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.

SoulEV2016
Posts: 568
Joined: Mon Jul 18, 2016 6:26 am

Re: Battery Ageing Model

Thu Sep 14, 2017 2:00 pm

interesting to compare my OpTime (2500h-16000km) and the teirhy OpTime (2500h-45000km). :mrgreen:
Kia Soul EV 2016 Ultimate 27 kWh - Mountain hard driving (fast). Drain 1/3 of Battery after 32km. - Unlimited highway speed (153km/h at regulator).

JejuSoul
Posts: 1028
Joined: Wed Jul 08, 2015 6:47 am
Location: Jeju
Contact: Website

Re: Battery Ageing Model

Wed Sep 20, 2017 8:24 pm

-
This post is copied from the Facebook thread here - https://www.facebook.com/groups/SoulEV/ ... 756149166/

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Scott Lockhart wrote:Over 103000km and still able to break the 200km/charge mark in the summer. I'm interested to see how the battery holds up over 200,000km....which should be in about 2 years
...
I hypermile the car all day every day (consistent throttle, efficient speed, best route etc). I'm not sure what actually helps the car most, but I need this battery to make 350000km so I try everything.
I only charge to 100 when I need too. I never leave the battery at 100 for more then an hour. And when I charge, I do it in stages...1am=80%, 430am=100%. That way the battery doesn't get to warm, it won't sit at 100% to long, and the battery will be at operating temp as soon as I leave to work. During the winter I purposely have the battery charge finish right before I leave to work so that it's still warm and I don't spend any energy warming it up.
I have never quick charged.
I try not to charge it if the car, or outside air temp is too warm. If it's really warm I use 120v.
I always drive in B.
I barely use any climate function.
In city driving, I've done over 200km many times. Summer average on rural roads is about 185k. I've never had less then 120km even in the winter. Winter average is 135-150km. Except twice I've driven the car at very high speed for a long duration, and the range dropped substantially.
My approach has been- EV batteries are still new, and much of what we learn is good for them hasn't truly been time tested. So to protect my investment, I put a lot of thought into whats good for the car.
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.

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