:29:00 PM
Subject: Re: [EVDL] CALB bolt terminals getting hot -
The cells in the TESLA pack are a group in parallel then the parallel
groups are wired in series for the desired voltage, The key to pack
survival when a cell fails is a fusible link (Correctly sized short length
of wire
Dave,
I have a pack like that, 16 cells, 48V. It is heavy and not packed tight
as it uses the plastic frames available for these cells. But the threaded
holes in the stamped end plates seem to be well made and can take real
torque. If they are nickel that explains their high cost. I always
Jay Summet via EV wrote:
The eSamba guy is using a piece of fuse wire to each cell, so that
if a single cell shorts out, the fuse wire blows...
That's a good plan. Do you know how he tested it, to be sure the fuse
wire is sized right to actually work?
--
The principal defect in a storage
Jay Summet via EV wrote:
Why not pressure fit? ...Flashlights do it all the time...
Think about how many times you've had bad connections and flickering
light, had to shake it or clean the contacts to get it to work.
You can make a good electrical connection with pressure alone, but it
On 08/20/2014 10:22 AM, Lee Hart wrote:
Jay Summet via EV wrote:
The eSamba guy is using a piece of fuse wire to each cell, so that
if a single cell shorts out, the fuse wire blows...
That's a good plan. Do you know how he tested it, to be sure the fuse
wire is sized right to actually
I believe he also used insulated wire to contain any molten copper beads
from getting loose.
On Wed, Aug 20, 2014 at 12:29 PM, Jay Summet via EV ev@lists.evdl.org
wrote:
On 08/20/2014 10:22 AM, Lee Hart wrote:
Jay Summet via EV wrote:
The eSamba guy is using a piece of fuse wire to each
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart via EV
Sent: Tuesday, August 19, 2014 9:08 AM
To: Martin WINLOW; Electric Vehicle Discussion List
Subject: Re: [EVDL] CALB bolt terminals getting hot -
Cor van de Water via EV wrote:
Depends on your
From: Roland via EV ev@lists.evdl.org
Attach a milliamp meter shunting that one link that was torque...
It seems to me that what you mean is a milliVOLT meter.
A milliammeter has a low internal resistance that can give you errors if you
don't have a good connection between it and the test
The website is now working. I forgot to save the changes.
I am not branching out to more services. Better for me to learn how to use
Google and whatever new stuff they have added. I used Google Picasaweb for
years without any trouble. The images I linked to were migrated to G+. I
am guessing
On 19 Aug 2014 at 15:48, Willie2 via EV wrote:
Please inform me if my Google+ page is not visible to all:
https://plus.google.com/102434734002949174273/posts
Perhaps one has to be logged on to Google? I didn't think so.
I had no trouble seeing your page, and I'm not logged in to Google.
On 08/19/2014 04:00 PM, Michael Ross via EV wrote:
The website is now working. I forgot to save the changes.
I am not branching out to more services. Better for me to learn how to use
Google and whatever new stuff they have added. I used Google Picasaweb for
years without any trouble. The
Sorry, the BMS on this pack is hanging outside the pack. There is an image
of another pack (32120 cells) that has the BMS mounted inside its wrapping.
The pack is meant to be used by eScooters and such. As these things go it
was very economical and seems to be functioning very well - except a
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On 08/19/2014 07:54 PM, Ben Apollonio via EV wrote:
True enough, but if a 200Ah cell fails shorted, it still has 200Ah
to dump all by itself, which is likely to be equally catastrophic.
I think the probability of occurrence is higher with 200 1Ah
] CALB bolt terminals getting hot -
The cells in the TESLA pack are a group in parallel then the parallel
groups are wired in series for the desired voltage, The key to pack
survival when a cell fails is a fusible link (Correctly sized short
length
of wire) in series with each and every cell
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Hash: SHA1
On 08/19/2014 09:12 PM, Peri Hartman via EV wrote:
So, if you want individual fusible cells, then a bus bar on both
terminals won't work. One side can be spot welded but the other
side needs the fuse wire - or something. Not sure how that
ev@lists.evdl.org
To: Lee Hart leeah...@earthlink.net; Electric Vehicle Discussion
List ev@lists.evdl.org
Sent: 19-Aug-14 5:29:00 PM
Subject: Re: [EVDL] CALB bolt terminals getting hot -
The cells in the TESLA pack are a group in parallel then the parallel
groups are wired in series
Flashlights only have a current draw of half an amp. The 18650 cells are
typically used at FIVE amps. And I often have to shake my flashlights to
clean the contacts before they attain normal brightness. (That indicates
they a corroding.) About two years ago I recall seeing a spot-welding
system
What, as a matter of interest, is an acceptable amount of resistance in a
battery or cell terminal connection? MW
On 17 Aug 2014, at 00:48, EVDL Administrator via EV wrote:
On 16 Aug 2014 at 14:04, Lee Hart via EV wrote:
The technique has been described many times on the EVDL. It must be
as heat.
Cor van de Water
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Martin WINLOW
Subject: Re: [EVDL] CALB bolt terminals getting hot -
What, as a matter of interest, is an acceptable amount of resistance in
a battery or cell terminal connection
Try an IR-Blue, I have one, and have used it at varying distances.
https://www.google.com/search?q=ir-blue
On August 16, 2014 2:13:23 AM CDT, Martin WINLOW via EV ev@lists.evdl.org
wrote:
Dan,
You should check the instructions for the laser thermometer - I expect
that, like mine, it recommends
Danpatgal via EV wrote:
I have on my to-do list to clean up the connections. With the BMS modules on
there it's just a pain and I have to be very careful (I know - if I had done
it at the beginning ...).
You can measure the resistance of the connections without taking them
apart. Then only
On 16 Aug 2014 at 14:04, Lee Hart via EV wrote:
The technique has been described many times on the EVDL. It must be in
the archives somewhere. Before I type it all in yet again, maybe we can
find it?
Here's one method.
http://www.evdl.org/archive/index.html#nabble-td4657626|a4657642
Just
From: Lee Hart via EV ev@lists.evdl.org
You can measure the resistance of the connections without taking them
apart... All you need is a normal multimeter and a source of a known
current (like your charger)... The technique has been described many times on
the EVDL...
Pump a fixed known
I have on my to-do list to clean up the connections. With the BMS modules on
there it's just a pain and I have to be very careful (I know - if I had done
it at the beginning ...).
I noticed the temperature first while driving from the BMS (Lithimate Lite)
telling me one cell was getting over
From: Danpatgal via EV ev@lists.evdl.org
... several of them were around
33C, in a grouping, maybe 6 or 8 posts adjacent on the most positive side
of my pack. Posts just a few cells more negative were much cooler, maybe
around 26C or cooler.
That doesn't seem like much!
In fact, that
I am with Jan.
The laser thermometers are averaging over the whole patch you see lit up
and they are not hugely accurate because of it. If the patch is larger
from being farther away or not circular because it is on an angle - it will
not report what you are hoping for. They are best for shining
On Aug 13, 2014, at 2:20 PM, Danpatgal via EV ev@lists.evdl.org wrote:
I am using 38x130 ah CALBs in my Lectric Leopard and have had a too hot (
40C) warning on my BMS come on a few times in the last month or so.
Do you get it when driving?
I have the Elithion Pro BMS. My to hot warning
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