Hi Rick and All,
Thanks all for the experiences so far. I appreciate it
as do others. Please let us know how yours is working with lithium charging
too as we need a good sample as we need a good low cost wthr meter especially
with adjustable relay outputs.
Cruisin, yes I know more complicated BMS, pricey,
could be better thought not necessarily, but bottom balancing with top voltage
charging limit and Lee Hart's Battery Bridge fault indicators will alert me to
a bad cell if and when that happens.
I haven't found enough on yours to know if it is good for
me or not. Is there details, price on it somewhere I can study?
While 1 BattB on the whole pack could work 1 per 2
modules housed in a lightproof box to a phototransistor or an optical coupler
would at low cost monitor each module if needed for fault conditions of not
just a bad cell but connections, etc that can damage too.
Since EV production car lithium specs are so tight this
can work it seems along with not discharging below 10% and not charging above
95% is likely a good way to go. Since it has worked on even the better of
Chinese lithium, LG cells shouldn't be a problem.
I'll charge full power until the end as it'll show a
fault better, before damage happens in my system is the plan.
Please those doing similar or other version please let
me/us know how it's doing?
Thanks,
Jerry Dycus
.
On Sunday, October 12, 2014 10:56 PM, Rick Beebe via EV <ev@lists.evdl.org>
wrote:
I have a JLD-404 that I use as a fuel gauge and it's worked flawlessly
for that. It seems to be pretty accurate. I have bought things from EVTV
even though they are more expensive than other sources, but these I buy
right from lightobject because Jack has cranked up the price way too
much. Their shipping is fair and quick.
I also use one of their JLD-612DC temperature controllers to control the
water heater in my truck. It too works well.
A problem, however, with controlling a charger is knowing what to
trigger on. The normal charge scheme is to charge to a certain voltage
at whatever amperage you can manage and then hold that voltage and taper
the current off to some small value. I don't think you can really
duplicate that. I suppose you could turn it off at some voltage and when
the pack voltage drops (which it will almost immediately) turn it back
on until it stops dropping below the threshold.
You could trigger on Ah but I always put more in than I took out so
that's problematic too.
--Rick
On 10/12/2014 3:10 PM, jerry freedomev via EV wrote:
> Hi All, In my continuing fight to lower lithium battery pack costs I
> was wondering if anyone has experience with the Lightobject Wthr ,
> etc meter like the one EVTV made the vid of they rebranded?
> Especially interested in it's use turning off the battery charger and
> how well it keeps track of battery capacity of lithium packs, etc?
>> Thanks,
> Jerry Dycus
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