marspilgrim
Posts: 60
Joined: Tue Jul 30, 2019 10:13 pm
Location: Chicago

EV Battery Degradation Comparison Tool

Sat Feb 22, 2020 2:02 am

2017 Bolt EV Premier

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paulgipe
Posts: 217
Joined: Mon Feb 20, 2017 12:39 am
Location: Bakersfield, California 93305
Contact: Website

Re: EV Battery Degradation Comparison Tool

Tue Feb 25, 2020 10:40 pm

marspilgrim wrote:From the GeoTab Blog

https://storage.googleapis.com/geotab-s ... index.html


Whoa, did you create that? Where did you get your data?

I am tracking our Bolts SOH if you need our data.

Paul
Paul Gipe
2020 Bolt LT with DCFC, leased 10/3/20
2017 Bolt LT with DCFC, leased returned
2015 Nissan S with QC, leased, returned
2013 Chevy Volt Premium, used, sold
www.wind-works.org

marspilgrim
Posts: 60
Joined: Tue Jul 30, 2019 10:13 pm
Location: Chicago

Re: EV Battery Degradation Comparison Tool

Sat Mar 07, 2020 3:02 am

Nope, it is just a blog that is part of a fleet owners website. I assume the data is aggregated from the all the companies tracking their vehicles. I mean, probably take it with a grain of salt but it was interesting selecting the different cars to compare. the Bolt is a little to new and fewer of them on the road to have enough data points. We'll know more in ten years. ;)
2017 Bolt EV Premier

SparkE
Moderator
Posts: 1166
Joined: Sun Sep 11, 2016 5:53 am
Location: SF Bay Area

Re: EV Battery Degradation Comparison Tool

Fri Apr 03, 2020 4:47 pm

Well, maybe they take amazing care of their vehicles. But looking at the line for 2012 and 2013 LEAFs, that degradation looks like complete bullshit.

michaelbolt
Posts: 19
Joined: Sat Sep 21, 2019 5:24 pm

Re: EV Battery Degradation Comparison Tool

Thu Apr 09, 2020 7:13 pm

The curves are not plausible. Until whoever created that shows where their data came from, it should be ignored.

mechanic
Posts: 9
Joined: Mon Dec 28, 2020 6:36 pm

Re: EV Battery Degradation Comparison Tool

Mon Dec 28, 2020 6:50 pm

What program can measure SOH (or kWh) high-voltage battery?

mechanic
Posts: 9
Joined: Mon Dec 28, 2020 6:36 pm

Re: EV Battery Degradation Comparison Tool

Wed Dec 30, 2020 1:43 pm

Car Scanner. :)

desiv
Posts: 62
Joined: Mon Oct 30, 2017 5:00 pm

Re: EV Battery Degradation Comparison Tool

Thu Dec 31, 2020 5:50 pm

SparkE wrote: But looking at the line for 2012 and 2013 LEAFs, that degradation looks like complete bullshit.

Not necessarily...
We know some Leafs in hot climates had really bad degradation. But that wasn't the case in other areas with cooler climates and places that were L2 heavy without a lot of Chademo.
If this data doesn't include those hot climate Leafs (i.e. is a lot of European Leafs, etc..), it might not be too far off...

That's the thing about data. It can be accurate, and still not useful depending on what the collection method and scope is.. ;-)

mechanic
Posts: 9
Joined: Mon Dec 28, 2020 6:36 pm

Re: EV Battery Degradation Comparison Tool

Thu Dec 31, 2020 7:05 pm

I asked about a program that can show the capacity of a high voltage battery.

SparkE
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Posts: 1166
Joined: Sun Sep 11, 2016 5:53 am
Location: SF Bay Area

Re: EV Battery Degradation Comparison Tool

Sun Jan 03, 2021 4:00 am

desiv wrote:
SparkE wrote: But looking at the line for 2012 and 2013 LEAFs, that degradation looks like complete bullshit.

Not necessarily...
We know some Leafs in hot climates had really bad degradation. But that wasn't the case in other areas with cooler climates and places that were L2 heavy without a lot of Chademo.
If this data doesn't include those hot climate Leafs (i.e. is a lot of European Leafs, etc..), it might not be too far off...

That's the thing about data. It can be accurate, and still not useful depending on what the collection method and scope is.. ;-)


1) the degradation for a 2013 LEAF is a straight line down to 80% after 6+ years. That's BS.

2) If the data set is small or restricted to "certain climes", it isn't very useful. Again, pretty much BS. Not necessarily *untrue*, just useless. Data on ONE 2013 LEAF driven in Portland OR is useless to just about everybody. GIGO.

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