Regarding battery electric vehicles: is there a difference between charging to 100 % for your trip or leaving it at 80 % and using fast charging on the way? In terms of battery aging.
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@nicd May vary with your vehicle and its Battery-Management-System
My yota has internals to allow 100% AC (slow) charge, but reduces DC load speed gradually more the higher the SOC, and by high-frequency DC load (same day) even more so, to protect the 10y/1Mkms gurantee. It also is said to have a higher internal buffer than most others, meaning 100% is perhabs only 92% or so (reducing range initially, but perhabs keeping up better in the long run)
Setting off with 100% AC load is likely always better, since it would reduce the DC load needed on the way
An EQE was recently tested after several 100Kkms having been DC charged daily, always kept between 20 and 80%, showing remarkably good state of its battery.
So maybe your question is not very important, as long as the general advices are adhered to. That may include not to drive maxed-out ob power lengthy times or often 😎
@nicd it depends on the battery chemistry (LFP vs NMC) and also less so on the charging method (“granny” trickle chargers won’t be as harsh going to 100% in the long term).
LFP batteries can easily charge at AC or DC to 100% frequently without long term effects, unlike NMC, but their tech is still being evolved (but is quite good if buying new).
Note though that recent analysis says that batteries on newly produced EVs are expected to last the car’s lifetime with 15% or less degradation. 2 links below:
https://www.electrifying.com/blog/knowledge-hub/lfp-vs-nmc-batteries-what-you-need-to-know-about-electric-car-batteries
And
https://evcentral.com.au/battery-life-fears-debunked-vw-id-3-drops-just-13km-in-range-over-160000km-driving/
Looping in @spacelizard in case I am incorrect, who owns a LFP battery car iirc.
LFP batteries can easily charge at AC or DC to 100% frequently without long term effects, unlike NMC, but their tech is still being evolved (but is quite good if buying new).
Note though that recent analysis says that batteries on newly produced EVs are expected to last the car’s lifetime with 15% or less degradation. 2 links below:
https://www.electrifying.com/blog/knowledge-hub/lfp-vs-nmc-batteries-what-you-need-to-know-about-electric-car-batteries
And
https://evcentral.com.au/battery-life-fears-debunked-vw-id-3-drops-just-13km-in-range-over-160000km-driving/
Looping in @spacelizard in case I am incorrect, who owns a LFP battery car iirc.
@WhombeX @spacelizard Ours is an ID.4 which I believe is NMC.
@nicd @WhombeX @spacelizard If its NMC: no issue to charge to 100% as long as you don't leave it there. its not the charging to 100% that ages it, it's remaining at that level that matters. Rapid charging can degrade the battery (especially if the battery runs warm), but the VW battery management is super-conservative and so the battery stays relatively cool.
Useful explainer: https://youtu.be/w4lvDGtfI9U
Useful explainer: https://youtu.be/w4lvDGtfI9U
@nicd In theory, probably. In practice, unless you're doing that regularly, very unlikely. Age is as much a factor and batteries are outlasting the cars they are in anyway.
@nicd sounds like you shouldn't let it sit at 100% for very long, or do multiple fast-charges back to back. Damned if you do, damned if you don't. https://chatgpt.com/share/68807e69-cfd8-800f-a1b5-5cb06f4a3ff7
@schizanon I appreciate you answering but I can also ask an LLM myself.
@nicd no you can't, you don't pay for it. You're welcome..
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