On Thu, May 28, 2015 at 11:01 AM, Cor van de Water via EV
ev@lists.evdl.org wrote:
Nope,
I have a little experience with charging older style Li-Ion batteries
by hand and the resting voltage is typically a rather fixed amount (delta)
below the charging voltage,
no matter how high you charged
Thanks David...
for pointing out the forgetfulness factor. Been there, done that. There are a
couple of fairly simple solutions to that particular problem. First, a charger
that is set at a low enough voltage to limit that danger. So far it has been
my experience with this pack that there
I don't know of a lithium cell that would be carrying significant capacity
at 2 Volts. That voltage would not hurt a Li cell. 2V would be a reasonable
low cut off. Higher gives you more leeway if your are far out of bottom
balance. If you bottom balance to begin with you are safer for a longer
On 28 May 2015 at 10:18, damon henry via EV wrote:
There are a couple of fairly simple solutions to that particular
problem. First, a charger that is set at a low enough voltage to limit
that danger.
I'm not a lithium expert, but this sounds like it should work well as long
as your cells
, May 28, 2015 10:54 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] FW: On the road again.
I disagree.
Assuming by your example the OCV of the cell is 3.8v and one charges to 4v.
After cycle 1 the OCV will be 22.8v
After cycle 2 the OCV will be 19v
After cycle 3 the OCV
Just remember to check each cell periodically to ensure they are staying
together. If one cell is weak it will drift down each cycle and eventually you
will overcharge the good ones and destroy the weak one (this is where fires
come from).
A little exaggerated perhaps but this is what
Sent: Thursday, May 28, 2015 10:54 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] FW: On the road again.
I disagree.
Assuming by your example the OCV of the cell is 3.8v and one charges to 4v.
After cycle 1 the OCV will be 22.8v
After cycle 2 the OCV will be 19v
After cycle 3 the OCV
I agree with Cor's comment on charging versus resting voltage - I mean a
cutoff voltage to be the resting voltage.
On Thu, May 28, 2015 at 2:18 PM, Michael Ross michael.e.r...@gmail.com
wrote:
I don't know of a lithium cell that would be carrying significant capacity
at 2 Volts. That voltage
: [EVDL] FW: On the road again.
I disagree.
Assuming by your example the OCV of the cell is 3.8v and one charges to 4v.
After cycle 1 the OCV will be 22.8v
After cycle 2 the OCV will be 19v
After cycle 3 the OCV will be 19v
Etc.
One can tell if there is a bad cell immediately after every
I disagree.
Assuming by your example the OCV of the cell is 3.8v and one charges to 4v.
After cycle 1 the OCV will be 22.8v
After cycle 2 the OCV will be 19v
After cycle 3 the OCV will be 19v
Etc.
One can tell if there is a bad cell immediately after every charge because the
OCV will be
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