Hi Cor,
Ahh, I wondered if that would be the case, that the entire pack would have lost
capacity "evenly". So if I understand correctly when you replace a pack you are
sourcing good used modules from salvage vehicles? Have you found any
replacement cells that would allow one to rebuild the existing modules? Or are
new cells simply too expensive? Seems that there are an increasing # of 6-7 yr
old Leafs that are still in good cosmetic and mechanical condition (60K miles
seems to be the sweet spot) but appear to be outliving their packs. I have been
looking into picking one up for my stepdaughter to use for college but I am not
sure I have the time or desire to look for a good used pack and then changing
it out. I would rather just build a new pack if feasible. If you run across a
source for new cells or modules please let me know. I have done a bit of
searching for these and have not found anything so far. Thanks Dach.
On Saturday, December 10, 2016 9:44 PM, Cor van de Water via EV
<ev@lists.evdl.org> wrote:
Hi David,
My experience has been that all cells in the pack degrade together.
There have been few reports of sudden catastrophic capacity loss,
which was then caused most likely by losing a cell in one module
and since a module has 4 cells: 2 pairs that are series/parallel,
so losing one cell means suddenly having exactly half capacity
since the BMS continues to protect each cell pair.
In such a case, replacing that bad module will restore the capacity.
All Leafs that I have worked on, I have swapped the complete
contents of a pack (48 modules).
It is possible to find decent packs for around $3k.
I typically get my packs either from buying a complete vehicle
or just the pack from a dismantler
BTW, you can check that all cells in a pack are equal in capacity by
checking the cell voltages when the pack is fully charged and
discharged.
The Leaf typically manages to keep the cells together within approx 20mV
so it is really easy to check using LeafSpy if there are any outliers
at either high or low charge level, indicating greater loss of capacity
in that cell.
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626 Skype: cor_van_de_water
XoIP +31 87 784 1130 private: cvandewater.info
http://www.proxim.com
This email message (including any attachments) contains confidential and
proprietary information of Proxim Wireless Corporation. If you received
this message in error, please delete it and notify the sender. Any
unauthorized use, disclosure, distribution, or copying of any part of
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________________________________
From: David Chapman [mailto:iasimov...@yahoo.com]
Sent: Friday, December 09, 2016 10:28 PM
To: 63urban; Cor van de Water; Electric Vehicle Discussion List;
Electric Vehicle Discussion List
Subject: Fw: [EVDL] Anybody interested in 2011 Leaf with new pack for
$8k?
Cor, lately I have seen a few of these older Leafs with a similar
problem IE diminished battery pack and am wondering if one could simply
just "troubleshoot" the existing pack and replace the sub par modules? I
have not worked on one yet so I have no idea if that is even feasible
let alone advisable, I just have seen "good used" modules on Ebay for
$100 or less and it got me to thinking about this tactic. On the other
hand you mention that particular 2011 Leaf with a "new" battery pack, I
am curious - are you replacing the 2 batteries in each module
(essentially "rebuilding" the modules) or have you simply found a
reasonably priced supplier of new OEM replacement modules? I am in AZ
and I would possibly be interested in looking for a discounted Leaf in
my area to "rehab". Like I said I have seen a couple similar deals where
they appear to be going cheap as the current owners are afraid of what
they might view as a rapidly diminishing pack. Would value your input on
this. Regards Dach.
"Do what you can, with what you have, where you are" - Theodore
Roosevelt "We reached the old wolf in time to watch a fierce green fire
dying in her eyes .... I was young then, and full of trigger-itch; I
thought that because fewer wolves meant more deer, that no wolves would
mean hunters' paradise. But after seeing the green fire die, I sensed
that neither the wolf nor the mountain agreed with such a view." - Aldo
Leopold
On Friday, December 9, 2016 3:27 PM, 63urban via EV <ev@lists.evdl.org>
wrote:
Cor where are you located again?
Sent from my Bell Samsung device over Canada's largest network.
-------- Original message --------
From: Cor van de Water via EV <ev@lists.evdl.org>
Date: 2016-12-09 4:48 PM (GMT-05:00)
To: Electric Vehicle Discussion List <ev@lists.evdl.org>
Subject: [EVDL] Anybody interested in 2011 Leaf with new pack for $8k?
Two months ago I bought a 2011 with a new battery for $8800 so I am not
waiting to buy another Leaf at this moment,
but a local Leaf owner is trying to sell his 2011 Leaf SL (the most
luxury version) for cheap since it lost 3 bars and he
has changed job so he no longer needs it.
I can install new modules in a Leaf battery so the total price comes to
$8k (I should have waited with the other Leaf I guess
but I did not know in advance that this would come around)
so you would end up with a nice Blue 2011 Leaf, I believe it has 63k mi
and no other blemish than a shallow scratch
on the front bumper due to a shopping cart (did not even break the
paint, just left an indent)
and the best is that it will have its original range, some Leaf owners
even report better than original range.
Let me know - don't wait too long with expressing interest as I need to
tell him if I put down a deposit to hold the vehicle,
else he might sell it any day...
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626 Skype: cor_van_de_water
XoIP +31 87 784 1130 private: cvandewater.info
http://www.proxim.com <http://www.proxim.com/>
This email message (including any attachments) contains confidential and
proprietary information of Proxim Wireless Corporation. If you received
this message in error, please delete it and notify the sender. Any
unauthorized use, disclosure, distribution, or copying of any part of
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