Sincere Thank you for this article, it highlights the weaknesses ( that I and other EV realists were bringing forward) and mitigation techniques the industry is using to reduce degradation and range impacts.
The data is different for all the different chemistries
On the MY's that the 4 members here have I believe UIAM all have 2170 NCA (Nickel Cobalt Aluminum) Panasonic cells.
If trying to get the "absolute" most life out of them there is wide agreement that dis charge to 35% and charge back up to only 55%. (Lowest cycle degradation)
But who is going to do that?
I plug in when not driving the car- I was setting the charge to 85% but last fall dropped it to 72% since driving most round trips is about 25 miles.
There is a test that can be done to nail down just how much capacity a vehicle has lost, but that requires charging to 100% and running to zero.
That seems like a sure fire way to "slightly" hurt the battery to me- so not going to do it.
Today was literally 1 year anniversary since picking the car up last St Patty's day.
They say the first year is the largest drop in storage capacity.
Calendar aging is actually more set in stone apparently.
I agree with what another poster in the linked thread said about charging...
"These findings are interesting to me but I won’t force myself or my wife to inconvenience ourselves, either".
ps poster of #236
is Not looking good...
If the projection is correct his battery will need repplacement at 40K miles... "2022 M3 LR 77.8 KWH NCA battery. I use it for my daily 30-35 miles; charge to 50 or 60% at 3.6 KW daily. Only 2X1500 mile trips using superchargers. The car + battery live a pretty charmed life; stored outside in Huntsville Alabama. I always precondition before leaving in the morning if the temperature is below 50F. Rarely floor it. I get my battery information from Tessie. The car has about 17K miles and it's not looking good for the battery - the projection is I'll hit 30% degradation at 40K miles. Thanks for your thoughts and comments"
www.recurrentauto.com
