Recent content by TCA

Although the 8-year battery warranty hasn't expired, here in England Nissan will only cover degradation not failing cells. Sticking strictly to the specific wording of the warranty. There been successful warranty claims for weak cells but this was several years ago under the 5-year EV...

Thanks again Mike. I understand now. So the "type 2" turtle is triggered by the approximately 200mV cell difference (for around 3 driving cycles), whereas the very low charge "type 1" turtle is based on the 3V cell parameter. Got it. I'm getting close to a "type 2" in that case. Currently...

Thanks Mike. Yes, similar situation here. SOC falls off a cliff at around 65%. One thing your post highlighted which I hadn't considered, was that you're still able to run the car on reduced power. I've always associated turtle with running out of charge, although never done it myself. So...

Thanks Mike. Very useful to know what actually happens in practice and the fact you could manage it up to a point. Just so I'm clear, are we basically saying that once the cell difference is at 200mV or thereabouts, then just driving another twice (or so) without recharging will cause turtle...

I've just read a post elsewhere where an EV technician said the maximum deviation allowed before turtle is 200mV but that has to be consistently exceeded for a number of drive cycles. His manual says 3 full drive cycles, but apparently it can vary. I'm not sure what a drive cycle actually...

Yes, I didn't want to derail the thread, so just asked a general question equally applicable to 62kWh Leafs. Thanks for your other comments. Good to know you continued to drive your car routinely down to 3.4V on the weak cell.

It's a 2016 30kWh Leaf. Yes, I've been monitoring for a couple of months and the decline is evident. Just trying to get information on how best to run the car until I get it sorted. I appreciate the situation is only going to get worse but don't want to make it worse by doing the wrong thing in...

Thank you goldbrick. That clarifies things. It's a bit scary seeing these ever-increasing mV cell differences, so it's good to know that nothing untoward is likely to happen until the single weak cell hits the turtle threshold.

Thanks again Stanton. I understood what you were saying. I was just looking for a way to avert total failure in the very short term. I know it's inevitable. Is turtle mode the worst thing that can happen in the first instance? Can I avoid turtle as long as I keep that weak cell over 3V, even...

Thanks Stanton. Keeping the battery topped up would only be in the very short term. What I'm trying to work out (with my limited knowledge) is how best to run the car without precipitating further damage until I can get this issue sorted. Avoiding turtle mode and DC charging would seem...

Thanks goldbrick. Is the low battery warning also triggered based on low cell voltage? So can I safely drive without doing more damage until that appears, regardless of the high mV cell difference? If so, does anyone know at what voltage the lbw appears? I think I read turtle mode triggers at...

I've got a weak cell showing in LeafSpy - currently 165mV cell difference at 90% SOC. I plan to get this cell or module replaced but in the meantime, like the example quoted above, do these high mV differences exacerbate the problem and hasten the total failure of the individual cell, or will...

A couple of quick questions for those more than knowledgeable than me. I'm frequently AC charging to keep the SOC high, in the hope this keeps the weak cell topped up and limits any damage so I can continue using the car before I can get it fixed. Am I doing more damage to the weak cell by...

Thanks. I just witnessed exactly that. After driving a 24 mile round trip from 100% SOC with driving in parts at 40-50mph, LeafSpy SOC finished at 78% with the cell difference at 133mV. After the next round trip of 9 miles, at slower speeds, LeafSpy SOC finished at 71% with the cell difference...

In terms of what is experienced while driving with a weak cell, will it just mean the low battery warning comes on much quicker, swiftly followed by turtle mode? The low battery warning on my test a month ago was at 17% SOC but guessing that'll be much higher now. Given the above LeafSpy...