rogersleaf wrote: ↑
Wed Jul 31, 2019 6:55 pm
Large amounts of data isn't needed. You answered the main question... The car is native to hot & sunny central Florida. It's no secret that heat destroys a LEAF battery, and it doesn't make much difference if driving vs. parked in the heat. Last time I was through the area, traffic was running at least 75 mph, and at times was getting passed by everything when running 80. That heat and workload was fine for my Ridgeline, but would never want to subject a LEAF battery to those conditions. Would expect consistently hot battery temps without much opportunity to cool off and not the slightest bit surprised your battery is loosing capacity quickly. Remember once having an air-cooled VW Bug, those machines also didn't do so well in the heat especially when run hard. Suggest paying a little more for an EV with liquid cooling.
In my data I also keep track of highest cell temp. and even when really warm out it's in the mid 80s. Battery has been on average in the mid 70s betwen November and April, and in mid 80s betwen may and October. Few sporadic peaks in the high 90s due to DC charging.
I avoid highways, avoid driving in the hot times of day and will go out of my way to park in the shade.
Because I rarely drive during the hot times, I also rarely use the A/C. That is correct, in central FL, in the summer, I very rarely use the AC... I suffer to maximize range. Also I avoid highways to maximize range, and when I go on the highways I set cruise to speed limit up to 65. Everyone passes me, but besides working the battery hard, if I go above 65, the Leaf won't go very far.
So I mostly do city driving when it's not hot out, without AC.
I drive very little 5 to 6k mi /year.
I can count on my fingers the charges to 100%, I usually charge with home L2 from 30% to 60% at most.
Extremely shallow charge cycles, and even with temps in the 60s of the FL winter I was experiencing an SOH drop of about 1%/1000.
Hot or cold weather, this car is losing 1% SOH per 1000 miles.
Which is consistent with the first battery... the original battery was replaced at 29k miles (previous owner)
I don't know what the SOH was, but it has to drop at least 4 bars to be replaced, which is about a 34% loss correct? 15% first bar and 6.25% the other 3?
I bought it with 35800mi, 6k miles later and SOH when I bought it was 94%. Dead spot on with 1% per 1000mi!
I now have 41616, about 12k miles after replacement, lo and behold SOH is 88.74, down 11.26% ... incredibly accurate!
So I drove 5800mi and SOH dropped from 94.08 to 88.74 or 1% every 1089mi to be exact.
Just like clockwork