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Possible Widespread 2018-19 Traction Battery Quick Charge Problems

Posted: Thu Mar 22, 2018 9:37 pm
by Evoforce
Story at https://youtu.be/XOgqM8iBtPM. I hope this is an isolated case...

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Thu Mar 22, 2018 9:40 pm
by LeftieBiker
It's already been yanked.

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Thu Mar 22, 2018 9:43 pm
by Evoforce
LeftieBiker wrote:It's already been yanked.
Hmmm... It still works on my cellphone. I will come back hopefully with a workaround. It has to do with a video about a longer range trip and the battery not accepting more than 24 KW after a couple of initial charges. I will try to find the poster of the video. OK, I had one letter incorrect in the string. Thanks for the heads up, fixed it!

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Thu Mar 22, 2018 10:03 pm
by LeftieBiker
It's starting to look very much like Nissan already knows that the 40kwh packs have the same design and/or build flaw as the 30kwh units. It is puzzling, though, that the QC speed restriction occurs regardless of pack temperature...

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Thu Mar 22, 2018 10:21 pm
by Evoforce
LeftieBiker wrote:It's starting to look very much like Nissan already knows that the 40kwh packs have the same design and/or build flaw as the 30kwh units. It is puzzling, though, that the QC speed restriction occurs regardless of pack temperature...
Yes, I agree. Guessing it is probably a software setup to make sure there is limited heat. Maybe it is software parameters that can be tweaked without completely sacrificing the battery.

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Thu Mar 22, 2018 10:27 pm
by cwerdna
LeftieBiker wrote:It's already been yanked.
Video plays for my on this page as well as on YouTube's page.

Haven't watched more than about 1 minute though. What's the gist? DC FCing is slower on the 40 kWh than the 24 kWh pack? Or, it gets throttled much earlier? I saw the bit about how he was estimating that a former 48 hour trip on a 24 kWh Leaf w/33 DC FCs he estimates would take 5 or 6 hours longer on a 40 kWh car.

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Fri Mar 23, 2018 1:01 am
by LeftieBiker
cwerdna wrote:
LeftieBiker wrote:It's already been yanked.
Video plays for my on this page as well as on YouTube's page.

Haven't watched more than about 1 minute though. What's the gist? DC FCing is slower on the 40 kWh than the 24 kWh pack? Or, it gets throttled much earlier? I saw the bit about how he was estimating that a former 48 hour trip on a 24 kWh Leaf w/33 DC FCs he estimates would take 5 or 6 hours longer on a 40 kWh car.
The original link had a typo in it. It's been fixed. The gist is that the 40kwh cars throttle back charging a lot from the third QC on, with all charge rates lower than claimed by Nissan, leading to charge times in the 4-5 hour range for each succeeding charge after the second QC, which is also reduced somewhat. So the 2018 Leaf is apparently a "One Fast Charge at a time" car.

EDIT: fixed the description.

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Fri Mar 23, 2018 1:11 am
by Nubo
Very strange that the throttling happens after the first one or two QC sessions. Edit: I misunderstood. It's the 3rd or 4th QC in a day that seems to be the problem. So the early squawks about rapid heating seem to be borne out. Or at least what the vehicle considers to be rapid heating. I'd be interested to know the actual temperatures.

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Fri Mar 23, 2018 1:43 am
by cwerdna
There was a thread at https://www.facebook.com/groups/nissan. ... 049538794/ squawking about something like this but there was no useful data (e.g. starting state of charge of each QC and starting and ending battery temps), at least not in the 1st few hours.

The thread has quickly blown up and I have no time to follow, nor do I really care since I have no plans to get at 40 kWh Leaf anyway. The lack of data (at least initially, not sure if it got better later) coupled w/FB's UI and problems that I pointed to http://www.mynissanleaf.com/viewtopic.p ... 64#p521264 all turn me off from spending time to discuss there.

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Posted: Fri Mar 23, 2018 1:59 am
by Eddiec
There is a thread about this on Speak EV (mostly UK based owners). Pretty much everybody who has done a long trip has encountered the issue.

https://speakev.com/threads/worried-abo ... te.101025/