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Re: New to me low mile 2017 with poor range?

Posted: Tue Apr 06, 2021 3:16 pm
by derbartman
In dealer today - they also see the bad cell - they say they need to do a more complex battery test - drain it 0% then charge 100% - so Im out a car for tonight. They also claim that even if its a warranty replacement Nissan only pays for 3 days of loaner - so if the part is going to take a week Ill have to choose when I want my 3 days..
but apparently we will know for sure the plan tomorrow

Re: New to me low mile 2017 with poor range?

Posted: Wed Apr 07, 2021 12:47 pm
by derbartman
Ok - Boulder Nissan today told me that they are replacing the module so unlike other stories of the past and in the UK this dealer at least is authorized to replace modules inside the battery pack and that is what Nissan US told them to do. New module in 2-4 days and then work is 3 days or so ? IDK why replacing one of those is so long - I sure wish we were getting the 40kwh - but either way this should make a huge difference for the car and having it work like we thought it would to start with will be a big win. Being without a car for 6 days not so great. Apparently Nissan will only do 3 day rental for warranty regardless of length of time waiting for part and work - then today they said 4. Im not sure how that is - it could take them a month to do it, but they give 4 day loaner - but Im going to try an not bother with the hassle.

Re: New to me low mile 2017 with poor range?

Posted: Wed Apr 07, 2021 1:47 pm
by DougWantsALeaf
Shucks, was hoping you would get a new pack.

Re: New to me low mile 2017 with poor range?

Posted: Wed Apr 07, 2021 2:41 pm
by derbartman
Us too for sure. I guess I wonder if a consumer in my situation would have been more likely to get a new battery pack if one were to locate a dealer which was not certified for module/cell replacement..
oh well - will be pretty dang happy if it works as well as should have all along

Re: New to me low mile 2017 with poor range?

Posted: Wed Apr 07, 2021 2:54 pm
by goldbrick
Possibly but I'd guess that most replacements packs are replaced since all the cells are bad. The cells probably all come from the same manufacturing batch so that they age equally. If that batch is bad then all the cells are bad and the pack needs to be replaced. If just one module is bad, then it's obviously cheaper for Nissan to just replace that module. The balancing system will need to keep the new cells within the voltage range of the older cells but so far that hasn't come up as an issue yet, AFAIK.

Re: New to me low mile 2017 with poor range?

Posted: Wed Apr 07, 2021 3:09 pm
by derbartman
well - IDK if its obvious its cheaper - ya it generally makes sense - there are fairly convincing posts on various boards of people with singular or small number of bad cells receiving new complete batteries - in fact the 40kwh -- but I hear y - makes sense to me - if a you tuber can replace a single module then surely the techs at nissan should be able to. but if it takes a tech 3 days to do it - what is shop time? x24 maybe $150?
but then again maybe a big chunk of that is getting to the battery at all. Also there are quality and such issues -
Also - cheaper isnt the whole picture for all this stuff - maybe there is work hazards - maybe risk to building etc..

Re: New to me low mile 2017 with poor range?

Posted: Wed Apr 07, 2021 3:31 pm
by SageBrush
derbartman wrote:
Wed Apr 07, 2021 2:41 pm
Us too for sure. I guess I wonder if a consumer in my situation would have been more likely to get a new battery pack if one were to locate a dealer which was not certified for module/cell replacement.
That would be my thought, but the flip side might be even more difficulty getting the dealership to understand the problem.

Congrats on getting this repair

Re: New to me low mile 2017 with poor range?

Posted: Fri Apr 16, 2021 2:59 pm
by derbartman
Ok - after Boulder Nissan having the car for 8 days we picked it up today. I asked if they had done the deep battery test like the one which allowed them to trigger the replacement and they didn't know. Already we know from the return drive and battery use it is way better. Once I was home I took this shot from leaf spy:
Image

Also this link in case someone wants to support them by going to their page and getting ads: https://ibb.co/dBNWctq

I guess Im sort of bummed my brand new module seems to be worse/weaker than my 17k mile 3 year old rest of battery.. but glad we have a real battery now.

Re: New to me low mile 2017 with poor range?

Posted: Fri Apr 16, 2021 3:49 pm
by LeftieBiker
If they didn't properly charge the new module before installing it, then it may just take a while to get up there with the rest of them. The BMS can't move large amperages.

Re: New to me low mile 2017 with poor range?

Posted: Fri Apr 16, 2021 10:42 pm
by alozzy
I would run the battery down to 5% SOC or so, then do a full L2 charge overnight to get the BMS to balance the cells a bit more. However, a 26 mV imbalance isn't that bad anyways.