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1203 posts

Uber Geek


  #2001486 24-Apr-2018 11:21
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gzt:
Linuxluver: I avoid metal roads. Like...stop...turn around and don't go there.

That's quite an achievement with the number of miles you've driven : ).

 

Or turning around has caused all those extra miles sealed

 

No spare makes me feel uncomfortable. I've certainly needed the spare on each and everyone of the other cars I've owned. I've gotten screws, bolts, nails and even the end of what looked like a hand-brake cable in my tires. Also hit a brick in the middle of the lane on a dark night. I've not gotten any punctures from gravel to date. So I'm quietly looking around for spare-tire idea's. I see the Australian versions had a spare, but they sacrificed the rear underside aero-dynamic shield to fit it in.

 

Does anyone know of any specialist Leaf wreakers to get used parts from?


282 posts

Ultimate Geek


  #2001506 24-Apr-2018 11:36
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RUKI:

Linuxluver:


.....
It is currently possible to replace a bad cell or 2, 3......but the linking of the battery to the battery management system (a proprietary restriction) limits the options for full replacement. ......
......or just buy a Hyundai Ioniq or BMW i3 or Tesla (online) locally. ..... 



re: reprogramming of swap battery - for me to start offering reprogramming part as a service is a matter of ordering part for about $3K which currently I can not see justifiable in ROI terms.


re: FTF are misleading general public by using two critical words " scientists" and "capacity". True scientists spend time in the LAB putting their assumptions to the test. True scientists have reference points. FTF folks got government money (80K) but have not tested any battery for capacity; they have not asked Jim (LeafSpy Developer) about what SOH is representative of. (Jim admitted that is is somehow related to capacity but not quite); they have not tested any brand new 30kWh battery (must have done at least 3) to have results as a reference point. Hence there is absolutely NO reference point for their findings. They have not tested for the same purpose capacity of NZ New EVs - e.g. Ioniq or BMW - so that those numbers could serve as a reference points going forward.


The truth is (as tested on many batteries in two LABS - my Battery Testing LAB and IDAHO Lab): "DC" - design capacity and "FCC"-Full Charge Capacity of the new battery (any chemistry) could differ and sometimes significantly.



The SOH value is read from the canbus. LeafSpy is just the app displaying the canbus value. It’s just amazing to me how many people are confused about this. The LeafSpy developer has nothing to do with it. Asking him how the value is calculated is pointless, he can only guess. You can use HappyLeaf on the google play store, or if you have deep pockets you can use the Nissan Consult tool to read exactly the same number from the cars computers.

 
 
 
 


879 posts

Ultimate Geek

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  #2001570 24-Apr-2018 12:52
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tripper1000:

 

Does anyone know of any specialist Leaf wreakers to get used parts from?

 

 

I've not been as lucky as Linux Lover. I've had a flat tire about once every 3 years (often away from my home town it seems).
This was the first one with a totally shredded sidewall though :(

 

Anyway I sourced a space saver from Gilmour Automotive here in Dunedin. Talking to Allister there are a range of cars that have the correct sized space savers so you might be able to collect one from a wrecker if you know what number of holes/diameter/spacing etc you need.
(Sorry I don't actually know that info myself)

 

Or otherwise go to a leaf dealer in your town and ask them.

 

 

 

 


282 posts

Ultimate Geek


  #2001889 24-Apr-2018 19:53
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Speaking of tyres, why do the stock tyres on the Leaf slip so much?  I can pretty much squeal tyres at every turn if I gun it.  They seem quite slippery.  Is that just eco tyres in general, and if so, how are they when braking?

 

I can't help but think tyres this slippery are possibly not as safe as grippy tyres.

 

 


Circumspice
684 posts

Ultimate Geek

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  #2001919 24-Apr-2018 21:07
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@zenourn - has the flipthefleet Leaf battery paper been accepted for publication in a reputable peer reviewed journal yet? Journal of Power Sources looks pretty good with IF ~6.


393 posts

Ultimate Geek


  #2001991 24-Apr-2018 23:49
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happyfunball:

 

Speaking of tyres, why do the stock tyres on the Leaf slip so much?  I can pretty much squeal tyres at every turn if I gun it.  They seem quite slippery.  Is that just eco tyres in general, and if so, how are they when braking?

 

I can't help but think tyres this slippery are possibly not as safe as grippy tyres.

 

 

 

 

I'm not familiar with the Leaf or its stock tyres in the flesh, but it does have going on twice the torque compared to similar class ICE vehicles, and that's available from the get-go, so I'd expect it would be easier to overcome tyre friction when you gun it.


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Master Geek

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  #2002068 25-Apr-2018 09:29
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paulchinnz:

 

@zenourn - has the flipthefleet Leaf battery paper been accepted for publication in a reputable peer reviewed journal yet? Journal of Power Sources looks pretty good with IF ~6.

 

 

We haven't submitted to a traditional journal yet.  We are currently working on V2 of the report with substantially more data and results from tests we are carrying out looking at the relationship between SoH and an independent standardised battery capacity test. This version will be submitted to a traditional journal with anonymous peer review.

 

Thanks for your journal suggestion, we haven't decided yet where to send it to yet.

 

One note is the current version isn't without peer review; before publishing the preprint we had it peer-reviewed by 12 people (see the acknowledgements). It has now also been available for open peer review on the preprint site where we have received and replied to several comments.


 
 
 
 


Circumspice
684 posts

Ultimate Geek

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  #2002282 25-Apr-2018 13:38
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Thanks @zenourn for response. 

 

Further, I appreciate there're various degrees of 'peer review'. Not sure how preprints.org defines peer review, but they've labeled every page of your paper (e.g. https://www.preprints.org/manuscript/201803.0122/v1/download) with 'not peer-reviewed'. The peer review model I'm familiar with is: editor(s) overseeing selection of, and requesting reviews from, 2 or more referees who are expert in the relevant subject matter, and in theory both editor(s) and referees should be independent of the manuscript authors. Anonymity is a separate consideration, but now I'm getting well off-topic...

 

I'm hoping your manuscript gets accepted in a 'big' journal, and Nissan responds in detail with letter to editor ... but dreams are free.


1203 posts

Uber Geek


  #2003389 27-Apr-2018 11:00
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happyfunball:

 

Speaking of tyres, why do the stock tyres on the Leaf slip so much?  I can pretty much squeal tyres at every turn if I gun it.  They seem quite slippery.  Is that just eco tyres in general, and if so, how are they when braking?

 

I can't help but think tyres this slippery are possibly not as safe as grippy tyres.

 

Your tyres will slip more easily if they are over inflated, and a lot of Leaf owners run higher than recommended pressures for reduced rolling resistance/greater range. 36psi is factory spec for the 16" tyres. If they are high, drop them back to correct pressure and see if it solves the issue.

 

Yeah, generally speaking eco tyres are more slippery than performance tyres, which is why you never see them on race cars. They wear slower because the rubber is harder but softer rubber grips better (think Formula 1 where they have the best grip tyres possible but they only last 1/2 a race). So it is a balancing act between the stickiness you desire vs how long you want them to last.


35 posts

Geek


  #2003606 27-Apr-2018 15:34
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Has anyone here gotten an additional FOB? Any recommendations for how to go about it? I've seen inexpensive units for sale on Aliexpress. Has anyone tried one of these?


Circumspice
684 posts

Ultimate Geek

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  #2003737 27-Apr-2018 20:12
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I had one done at Nissan dealership which was ~$450 and took a few weeks. I think this question's been asked before - if you haven't already tried, search this thread as a Single Page.


282 posts

Ultimate Geek


  #2003743 27-Apr-2018 20:21
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tripper1000:

 

happyfunball:

 

Speaking of tyres, why do the stock tyres on the Leaf slip so much?  I can pretty much squeal tyres at every turn if I gun it.  They seem quite slippery.  Is that just eco tyres in general, and if so, how are they when braking?

 

I can't help but think tyres this slippery are possibly not as safe as grippy tyres.

 

Your tyres will slip more easily if they are over inflated, and a lot of Leaf owners run higher than recommended pressures for reduced rolling resistance/greater range. 36psi is factory spec for the 16" tyres. If they are high, drop them back to correct pressure and see if it solves the issue.

 

Yeah, generally speaking eco tyres are more slippery than performance tyres, which is why you never see them on race cars. They wear slower because the rubber is harder but softer rubber grips better (think Formula 1 where they have the best grip tyres possible but they only last 1/2 a race). So it is a balancing act between the stickiness you desire vs how long you want them to last.

 

 

I'm concerned about braking distance, and handling on a wet road.  I think I'd trade some reduced range for a safer car, do you think upgrading the tires makes sense in my case?  I don't really care about tire wear, its safety for our family that comes first.

 

 


1149 posts

Uber Geek


  #2004319 28-Apr-2018 22:44
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happyfunball:
...or if you have deep pockets you can use the Nissan Consult tool to read exactly the same number from the cars computers.

 

Was digging very deep inside Nissan Dealership Consult3+ tool tonight and found where that LBSOH was hiding (e.g. 0.88 read a minute ago from my Virtual Leaf in the Lab. Official Tech from Nissan Dealership overseas was telling me they did not see it. Found it finally. Cross-checked with Leaf Spy - 88%

 

It is not in the main diagnostic section which is used by Techs daily, that explains why they have not noticed it.





Toyota / Lexus Hybrid and EV Battery Expert Battery Test & Repair 

 

 


282 posts

Ultimate Geek


  #2004735 29-Apr-2018 21:11
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RUKI:

 

happyfunball:
...or if you have deep pockets you can use the Nissan Consult tool to read exactly the same number from the cars computers.

 

Was digging very deep inside Nissan Dealership Consult3+ tool tonight and found where that LBSOH was hiding (e.g. 0.88 read a minute ago from my Virtual Leaf in the Lab. Official Tech from Nissan Dealership overseas was telling me they did not see it. Found it finally. Cross-checked with Leaf Spy - 88%

 

It is not in the main diagnostic section which is used by Techs daily, that explains why they have not noticed it.

 

 

I agree the number is buried, and its a great the EV community exposed this very useful number.  Leafspy really makes buying an EV less risky.  They discovered a huge amount of information about the car and battery from the canbus, and leafspy used the research for their app.  See:  http://www.mynissanleaf.com/viewtopic.php?t=4131

 

Its like Nissan didn't consider battery degradation to be a problem, just cell failure. It seems this 30kwh issue and the earlier hot climate issues on Gen1 cars really took them by surprise.

 

 


1203 posts

Uber Geek


  #2004748 29-Apr-2018 21:52
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happyfunball: I'm concerned about braking distance, and handling on a wet road.  I think I'd trade some reduced range for a safer car, do you think upgrading the tires makes sense in my case?  I don't really care about tire wear, its safety for our family that comes first. 

 

If you care about braking distance, cornering and wet weather performance, Eco tyres are not really the tires for you. Talk to your local tyre shop - the guys are usually pretty knowledgeable and gladly  spell the differences between all the models if you ask. Weather or not it makes sense depends on you and how deep your pockets are. If family safety is paramount there are organisations that offer tuition in emergency braking, cornering, collision avoidance, using ABS to its full potential etc. The courses can be a lot of fun, skidding cars up to and around cones and stuff.


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