Boards.ie uses cookies. By continuing to browse this site you are agreeing to our use of cookies. Click here to find out more x
Post Reply  
 
 
Thread Tools Search this Thread
29-04-2019, 21:36   #751
Mad_Lad
Registered User
 
Join Date: Sep 2007
Posts: 15,632
3200 cycles to 80% that would be about 544,000 Kms to 80% capacity based on 100% 0-100% cycles.
Mad_Lad is online now  
Advertisement
29-04-2019, 21:42   #752
KCross
Registered User
 
Join Date: May 2010
Posts: 6,010
Quote:
Originally Posted by Mad_Lad View Post
But don't forget that battery life depends on many factors , improve the chemistry to better withstand some of those factors and you improve more than cycle life.
Absolutely true, yes.
And the i3 is going to be one of the best of the lot I’d say. It will outlive the car, most likely.

All I’m saying is I don’t believe 100% SoH , that’s all. There is degradation no matter how good it is.
KCross is offline  
29-04-2019, 22:06   #753
unkel
Category Moderator
 
unkel's Avatar
Quote:
Originally Posted by KCross View Post
It will outlive the car, most likely.
Almost all lithium batteries will outlive the cars. I'll go one further. Even batteries that fail under warranty (there will be very few of these) will have a useful second life as grid / home attached storage

You are right of course stating that batteries start degrading straight away. The degradation might be very small though. I.e. I charge my car maybe twice a week and rarely when it is really empty. So now after over two years owning it, it has only done about 200 cycles. In Ireland's mild climate. I't quite likely it's still at about 98-99% SOH

I'm also with you on the 100% being reported. I don't believe that. Particularly not in the case of high mileage 2 year old Ioniqs in colder countries like say Canada.
unkel is offline  
29-04-2019, 22:24   #754
KCross
Registered User
 
Join Date: May 2010
Posts: 6,010
Quote:
Originally Posted by unkel View Post
Almost all lithium batteries will outlive the cars. I'll go one further. Even batteries that fail under warranty (there will be very few of these) will have a useful second life as grid / home attached storage
True. Probably any EV built since 2013 will be in that bracket. Particularly if you use the average age of ICE today, which I think is about 13yrs.
KCross is offline  
29-04-2019, 23:49   #755
n97 mini
Registered User
 
Join Date: Oct 2010
Posts: 7,654
Quote:
Originally Posted by Mad_Lad View Post
I believe it because it gives me the same range to 50 % same routes same driving style. The leaf did not after 3 years and I reached low battery earlier in my commute by the time I got rid of it.
Possibly a better buffer than the Leaf, which as we know is bare minimum. To really show KC's point, the Ampera has a massive buffer, comparatively speaking: 6kwh out of 16.5kwh. So over say a 15 year period the battery will probably still show 100% capacity, even though maybe 5kwh (30%) has been lost. No current lithium battery tech is immune from degradation. Fact.
n97 mini is offline  
Advertisement
30-04-2019, 00:04   #756
unkel
Category Moderator
 
unkel's Avatar
If you never let your Ampera battery go below 25% and do average mileage it will still have 75% capacity after 40 years
unkel is offline  
30-04-2019, 00:05   #757
Mike9832
Registered User
 
Mike9832's Avatar
 
Join Date: Oct 2018
Posts: 947
Quote:
Originally Posted by n97 mini View Post
Possibly a better buffer than the Leaf, which as we know is bare minimum. To really show KC's point, the Ampera has a massive buffer, comparatively speaking: 6kwh out of 16.5kwh. So over say a 15 year period the battery will probably still show 100% capacity, even though maybe 5kwh (30%) has been lost. No current lithium battery tech is immune from degradation. Fact.
Lithium-titanate is
Mike9832 is offline  
30-04-2019, 08:20   #758
Mad_Lad
Registered User
 
Join Date: Sep 2007
Posts: 15,632
No lithium battery is immune from degradation but batteries have Improved since the 24 kwh leaf.

As I said , small changes can have big impacts.

Higher cycle life along with more kwh means cycle life probably increases two fold as more Kwh means less cycling along with increased cycle life.

Better temperature resistance , lower internal resistance etc so it’s easy to see that the I3 May very well still have 100% of its capacity or maybe 0.1% loss etc.
Mad_Lad is online now  
30-04-2019, 09:30   #759
ELM327
Registered User
 
ELM327's Avatar
 
Join Date: Feb 2017
Posts: 8,278
Quote:
Originally Posted by unkel View Post
If you never let your Ampera battery go below 25% and do average mileage it will still have 75% capacity after 40 years
The ampera battery never goes below about 25% anyway as just under 10kWh is available from 16kWh gross
ELM327 is offline  
Post Reply

Quick Reply
Message:
Remove Text Formatting
Bold
Italic
Underline

Insert Image
Wrap [QUOTE] tags around selected text
 
Decrease Size
Increase Size
Please sign up or log in to join the discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search



Share Tweet