6% Battery Degradation after 3 years, 35k miles

[0CO2]

Hey, apparently, there could be multiple factors. Where do you live? And do you keep the charge between 10% and 90% often?

Western Oregon, so little extreme cold; I tend to keep the SOC between 40-80% in recent months but for much of the past 3-years between 40-90%. I've probably taken it to 100% SOC <25 times in total, usually just before a long road trip. I've had it down near 2-3% maybe twice in total.

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[Blue highway]

The thing with worrying about the SOH is how often you need 100% of the battery, vs how often you use 100% -2, -2, -2, -2, -2 =% 5 years after buying. 5 years from now you've taken a 10% range hit and 99% of your driving is less than 50% of your range it's nothing to lose sleep over. Does it hurt a little knowing the numbers? Yes. just like the sleep people lose over their phones only having 90% of the battery 2 years later.

Just stop it with facts and reason... this is the internet. Where is the panic and vitriol?

 

[Haven]

Well I’d take 6%. As a general rule of thumb I’ve read in other posts to expect 2.3% per year.

I have a 21 GT with 40,000 with 3 years on the extended battery with 89.5% SOH. I do fast charge when I travel 20-30 times a year. I keep it in the 20-80% range unless I need 100%. I’m in Florida for the winter and Michigan in the summer so it does get more warmer weather than if I was in Michigan year round. I’m an easy driver on it too.

Will be charging it to 100% for the trip home next week.

 

[azerik]

Just stop it with facts and reason... this is the internet. Where is the panic and vitriol?

Strange I get the same reaction at work. lol

I believe the 'damage' of DCFC and charging to 100% is the dendrite growth. Which causes shorts and de-lamination of within the cell to cause capacity.
Here's a short 38 page read:
https://www.sciencedirect.com/science/article/pii/S2590238520301284

 

[Blue highway]

Strange I get the same reaction at work. lol

I believe the 'damage' of DCFC and charging to 100% is the dendrite growth. Which causes shorts and de-lamination of within the cell to cause capacity.
Here's a short 38 page read:
https://www.sciencedirect.com/science/article/pii/S2590238520301284

Thanks for the link. 100% SOC and high temps are a bad combination is the consensus I am seeing in recent research. ( dendrite growth likes that combo)

As for fast charge, the "problem" is defining what is meant by "fast" and where does less fast begin to matter. Ford caps the rate at 1.5C which is really conservative. For perspective Tesla caps charge rate at 3C and I just read of someone (Porsche maybe) going to 4C cap in their next cars.

but remember next time, try flying off the handle or making some sweeping generalization about the end of society. Remember... this is the internet

 

[azerik]

It's all about how well the manuf. handles the growth. I think Porsche isn't using LG who's previous goal was as many batteries as possible as fast as possible without them blowing up or catching on fire. There's a huge amount of research in different ways to slow/stop the growth but just like all the great battery tech we've been hearing about, we only hear about it and it doesn't get very far. But to play the devils advocate they're can't play around with too much black magic when creating this new tech due to all the restrictions and extra warning labels like 'Do not eat your battery', at least while charging. I think the growth is still a big hinderance when battery tech companies start throwing around 4c+ charge rates, then totally gloss over the fact it kills the battery in 1/2 the time or something. (Not all new battery tech does this but I'm pretty sure it's the lifecycle of the battery or the astronomical cost of making it. Or big oil is just secretly making people disappear.)

Even the Lipo RC car batteries I've had over the last 15 years 2 maybe 3 c charge rate on something that has a 100c+ discharge rate.

 

[dtbaker61]

According to the Car Scanner app, my '21 Select, RWD, Std Battery shows 6% degradation after 39 months and 35k miles. This was checked after an 80% charge and an ambient temp of 68 deg. The GOM used to show 200 miles on an 80% charge but now shows 190 (which is down about 6%). Sound about right?

for best accuracy, you *probably* should check in 'standard conditions':
- ambient=70F +/-5 degrees
- after a full charge, and unplugging for 4-5 hours to let batteries 'settle'.

I have a 3 yr old 36k mile Select AWD - SR, my SOH shows 95%, but I have only looked ever 10k miles or so. I noticed a few % drop in first year, but then no drop lately.

 

[Machinator]

Reading this, I wonder, is most fast charging DC? How would you know? I occasionally go to Electrify America to charge a little if low….

 

[ocdxfv]

All fast charging is DC. That’s partly what makes it fast. DC going directly into the DC battery.

 

[Teslaeata]

So, at 33 months and 84,265 miles:

29,468.61kWh charge power
Total cost £8,077.30
Average 2.86mls/kWh
Average £0.10/mile

449 home charges @11kW
22,401.97kWh 76.02% of total power
£3,611.56. 44.71% of total cost

238 DCFC charges
7,066.637 kWh 23.97% of total power
£4,465.47. 55.29% of total cost


Similar size ICE car @ 48mpg, fuel cost saving is c£4,000.

SoH c92% just re checked today

 

[MuckyMach-e]

Well I’d take 6%. As a general rule of thumb I’ve read in other posts to expect 2.3% per year.

I have a 21 GT with 40,000 with 3 years on the extended battery with 89.5% SOH. I do fast charge when I travel 20-30 times a year. I keep it in the 20-80% range unless I need 100%. I’m in Florida for the winter and Michigan in the summer so it does get more warmer weather than if I was in Michigan year round. I’m an easy driver on it too.

Will be charging it to 100% for the trip home next week.

You’ve lost 10.5% over 40,000 miles. At that rate you will have lost 26.5% at 100,000 miles. Just 3.6% short of Ford owing you a new battery.

 

[Xanasazi]

You’ve lost 10.5% over 40,000 miles. At that rate you will have lost 26.5% at 100,000 miles. Just 3.6% short of Ford owing you a new battery.

at that point I'd be purposely trying to degrade the battery ?

 

[Chainspell]

You’ve lost 10.5% over 40,000 miles. At that rate you will have lost 26.5% at 100,000 miles. Just 3.6% short of Ford owing you a new battery.

From what I’ve read on battery degradation most of it occurs in the first year or two then it tapers off and only drops slowly. So in other words it’s not linear. At 100k miles it might only be 15% loss for example. I’m curious who has the highest mileage here and what they are at.

 

[Teslaeata]

From what I’ve read on battery degradation most of it occurs in the first year or two then it tapers off and only drops slowly. So in other words it’s not linear. At 100k miles it might only be 15% loss for example. I’m curious who has the highest mileage here and what they are at.

84,000 miles at 34 months and 92% SoH

 

[tminter4]

According to the Car Scanner app, my '21 Select, RWD, Std Battery shows 6% degradation after 39 months and 35k miles. This was checked after an 80% charge and an ambient temp of 68 deg. The GOM used to show 200 miles on an 80% charge but now shows 190 (which is down about 6%). Sound about right?

According to the Car Scanner app, my '21 Select, RWD, Std Battery shows 6% degradation after 39 months and 35k miles. This was checked after an 80% charge and an ambient temp of 68 deg. The GOM used to show 200 miles on an 80% charge but now shows 190 (which is down about 6%). Sound about right?

I had a 21 that I traded in for a 23 about a month ago and it was showing about 8% degrade. Like you I used to get around 200 miles on a 80% charge. It had went to around 180, depending on the time of year.

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