Astros wrote: ↑
Fri Oct 05, 2018 11:04 am
I've had a 2018 Leaf for about six months, and in that time we've taken multiple trips of ~300 miles in a day and two ~500 mile days. On long trips like that, the battery heats up and the quick charges after the first are significantly throttled (rapidgate, as has been covered extensively elsewhere). In the summer I typically got ~45kW for the first charge, 20-25kW for the second, and ~16kW for the third or higher session. Since this charge rate is set by the car, I would really like to see the maximum current charge rate displayed in one of the dash screens, so it is easier to plan charging stops. Yes, I can use LeafSpy to get the temperature and calculate the expected charging rate, but that's not always easy while driving. And, it would really help out people who are new to the car.
Even better would be if we could set the maximum charging rate ourselves. I'm not even asking for the ability to set it higher than the throttled rate, since I assume if we could do that Nissan would find a way for that to void our battery warranty. I'd like the ability to set the maximum charge rate to, say, 30kW for the first charge. That way if I am on a long trip and know I'm going to be doing multiple charging sessions I can keep the battery from getting into the red so quickly, and maybe get a higher average charge rate.
Having done the same with my 2018, I found the only real acceptable solution for me was shorter quicker stops initially planning the long hot charge stops with meals or "events". Unlike my E Plus, when the 40 kwh pack gets hot, it stays that way. With the much shorter range, it was hard to tell but with OAT in the mid 70's (currently the only temperature range I have to compare) my E Plus batt temps would settle into the mid to upper 90's with freeway driving being slightly cooler than typical city driving. I think the higher regen profile of the E Plus heats up the pack when there is a lot of acceleration over the more or less constant velocity typically seen on the highways.
The 40 kwh "probably" settles at a higher temp around 105ishº Now this is a guess and complicated by the shorter range and less time for pack temps to settle.
To elaborate; I charged my E Plus at Vancouver Plaza, pack temps were in the low to mid 100's. I take off for Olympia speeds around 70 mph and pack temps dropped and settled between 98 to 99º. But this was a 100 miles. Finding that length for my 40 kwh was all but impossible to do since a lot of my charging was taking advantage of the rate before it slowed significantly. In most cases, I was only charging until the rate dropped below 40 KW for first 1-2 charges, the 30 kw for 2-3 charges, etc so didn't charge above 75% that much.
BUT, I did see times when I would finish DC charging at a station ~ 100º and still see pack temps rise when I started driving. I always thought it was residual heat from charging simply not hitting the sensors right away but the temps always seemed to rise and stay there most of the time which is part of why I guessed the 105ish º number.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 16,686 mi, 91.51% SOH
My Blog; http://daveinolywa.blogspot.com
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