(Mod Note: Not putting this in the "Decreasing rated range" thread because: 1) This is the opposite issue, and 2) that thread is long and meandering, altho similar issues have been discussed there).
There's been discussion here previously about the fluctuations in range estimates the car provides, and in particular the downward trend over time. We know that Li-ion cells lose some capacity over time/charge-cycles. But there are other factors at play in estimating cell capacity, and thus computing an estimated range.
This has been talked about in other threads. One of the claims I've made previously is that:
In addition there's been discussion about firmware upgrades "resetting" the algorithm and giving "false positives" in additional range estimation that subsequently disappears... as well as suspected algorithm changes that seem to affect things.
Because I'm of the belief that shallow charge cycles are best for the battery, I typically charge only to 60-70% during weekdays, and 90% on weekends. I'd rather a healthier battery than some imbalance or estimation error. My 70% charge yields 175-176 miles these days. I rarely drive below 30%.
I charged to 100% for probably only the 2nd time in a year or so yesterday. And this time I let it run for the final ~40 minutes to complete the charge, during what's assumed to be the balancing phase. My final range estimate at 100% was 253 miles when it completed, and actually 254 when I got in the car to leave an hour later (I've seen such "settling"before). I then drove it down to 14 miles left.
Today, my 70% charge rendered a 179 mile range estimate... 3-4 miles more than normal. It will be interesting to see how long that lasts.
So it's another data point that indicates that range "loss" that many people worry about is not actual battery loss, but factors 2 & 3 above. Thus I'm inclined to continue my current shallow-charge regimen.
I suspect if I were to repeat this cycle a number of times, the numbers might climb a bit more, including that for the 100% charge state.
There's been discussion here previously about the fluctuations in range estimates the car provides, and in particular the downward trend over time. We know that Li-ion cells lose some capacity over time/charge-cycles. But there are other factors at play in estimating cell capacity, and thus computing an estimated range.
This has been talked about in other threads. One of the claims I've made previously is that:
scaesare said:
In addition there's been discussion about firmware upgrades "resetting" the algorithm and giving "false positives" in additional range estimation that subsequently disappears... as well as suspected algorithm changes that seem to affect things.
Because I'm of the belief that shallow charge cycles are best for the battery, I typically charge only to 60-70% during weekdays, and 90% on weekends. I'd rather a healthier battery than some imbalance or estimation error. My 70% charge yields 175-176 miles these days. I rarely drive below 30%.
I charged to 100% for probably only the 2nd time in a year or so yesterday. And this time I let it run for the final ~40 minutes to complete the charge, during what's assumed to be the balancing phase. My final range estimate at 100% was 253 miles when it completed, and actually 254 when I got in the car to leave an hour later (I've seen such "settling"before). I then drove it down to 14 miles left.
Today, my 70% charge rendered a 179 mile range estimate... 3-4 miles more than normal. It will be interesting to see how long that lasts.
So it's another data point that indicates that range "loss" that many people worry about is not actual battery loss, but factors 2 & 3 above. Thus I'm inclined to continue my current shallow-charge regimen.
I suspect if I were to repeat this cycle a number of times, the numbers might climb a bit more, including that for the 100% charge state.
