My calculations = 2.5 % per year for the past 6.25 years.
How about yours?
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How about yours?
Sent from my SM-N986W using Tapatalk
Hybrid Battery Degradation
taofen_wang
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Not sure how to test since I didn't own this car when it was first sold but it still charges to 17mi even though the EPA sticker only says it should get 14mi... which I've always thought was a little odd.
It could MAYBE get 17 miles on a day where I don't run any AC or heat, but I feel like it still gets awfully close to what it probably got on day 1.
It could MAYBE get 17 miles on a day where I don't run any AC or heat, but I feel like it still gets awfully close to what it probably got on day 1.
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Based on historic charge activities. In the end of 2019, I was able to charge to ~7.16 kWh (best) from "zero" capacity available. Today, I can only charge to ~6.46 kWh (best) within 3 hours.
7.16 - 6.46 = 0.7 KWh
0.7 / 7.16 = 9.776 %
9.776% / 2.5 years = 3.9 % per year.
Based on the range I estimated:
In 2016 (March), I could get 32 km range.
In 2022 (July), I can get 27 km range.
32 - 27 = 5 km
5 / 32 = 15.625 %
15.625 % / 6.25 years = 2.5 % per year.
Total Charge (only from home charger):
I expect more range lose in the future.
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I did the math a bit different, assuming everything you provided is correct, it is more like losing 3.3%/year of what you have left, not 2.5% of total. Your way, battery will be useless after 40 years, and 50% after 20 years.
This way, it will be 50% after 22 years but after 40 years will still have 18% left.
I don't know if that is actually how batteries age, probably more a combination of the 2, but I'm sure it isn't linear, more like a percentage lost of available at that time.
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34 Posts
you get 27 km real distance or this is shown on the dashboard? i get 20 km net and 5kw usable capacity (xc90 t8 16)
Typically, battery capacity degradation is measured against charge cycle count rather than time. If you can access cycle count, that would be a better metric for this survey 
For those who are interested, this is because lithium dendrites on the anode (and other cell artifacts) form primarily as ions are exchanged, rather than when the battery is in stasis.
In my previous vehicle, I lost 6% capacity after approximately 250 charge cycles (over 36 months and 50.5k miles).
For those who are interested, this is because lithium dendrites on the anode (and other cell artifacts) form primarily as ions are exchanged, rather than when the battery is in stasis.
In my previous vehicle, I lost 6% capacity after approximately 250 charge cycles (over 36 months and 50.5k miles).
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Yes, 27km on the dashboard with pure mode.
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How do you count the charge cycles? I only get charge counts.Typically, battery capacity degradation is measured against charge cycle count rather than time. If you can access cycle count, that would be a better metric for this survey
For those who are interested, this is because lithium dendrites on the anode (and other cell artifacts) form primarily as ions are exchanged, rather than when the battery is in stasis.
In my previous vehicle, I lost 6% capacity after approximately 250 charge cycles (over 36 months and 50.5k miles).
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OK I get 32km but in the first 3 kms are dropping fast to 24km and as real distance I get 21 km
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I feel like 2.5% is spot on with what Volvo's expectation was. Use and charging habits of course can play a role. It's not a topic they offer too often, but it was in a training course at some point. From the automotive perspective, end of auto life is planned at around 50%.. at which point the battery cells would be useable for a home station or something where the weight and space per kwh stored is not as big a factor.
I do not know how to measure this, but using the actual electric-only range as a metric, the battery in my 2017 XC90 T8 has degraded approximately 40% over 4.5 years and 51,000 miles. Initial electric only range when new was 17 miles. Currently, it is about 10 miles. It is currently at the dealer to investigate this issue. But they have now informed me that even with contacting Volvo corporate technical support, that the car is working normally and there is nothing to fix. In the 4.5 years, I've had about 1,100 charge cycles. At a 41% decline, that is 9.1% per year. Currently not happy with Volvo about my situation.
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It depends on how you drive. When was your last total software update?
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My last total software update was two weeks ago. The dealer did this when I took it in for this problem. They returned it that time saying it was working as designed. I tested after and still had just 10 mile range.
Numerous T8s had a BECM issues, which could be part of the problem. My T8 slowly began showing 15 miles of range in PURE (down from 20) and a BECM firmware update and reset fixed it.
My Turtle(s) and battery issue ( I was right about my...
My Turtle(s) and battery issue Car: 2019 XC 60 T8 with 6400 miles, Dec 27th 2019 My Turtle experience!! on Tuesday experienced my 1st ever turtle!! Came on twice very briefly.....Then on Thursday on the way to work, it came on and stayed on for the remainder of the trip. On the way home...
www.swedespeed.com
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@ktenbrook , @HalfMilionKmT8 . If you can get 32km on the dashboard, it is not too bad. I recall one software update made the range on dashboard down for few one.
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Probably the same thing. I don't have a T8 (yet), so I don't know how you arrive at that number in this vehicle.
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