Today's Message Index:
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1. 03:46 PM - Re: Promised data on YONHAN 8A charger performance (skywagon185guy)
2. 05:28 PM - Re: Promised data on YONHAN 8A charger performance (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: Promised data on YONHAN 8A charger performance |
Hi Bob,
About the YONHAN charger-maintainer. . .
After it steps into the maintainer mode cycle does it stay there or does it
go to an Off mode after a certain time period..?
Reading some of the details, it seems to have an Off mode option which on a
maintainer seems odd.
If it does have an Off mode, then it must have some sense circuitry to tell
it when to switch back on and run the whole scenario again.
David
On Mon, Oct 16, 2023 at 9:24=AFAM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> Got a chance to organize and annotate the charging
> plots I gathered on the YONHAN 8A charger we discussed
> her on the List a few weeks ago:
>
>
> http://aeroelectric.com/Pictures/Battery_Chargers/YONHAN_8A_Charger-Maint
ainer/
>
>
> A the data suggests, this product is a well-behaved
> charger maintainer. The 'pulse-repair' tap-dance
> is readily observable even if its effectiveness is
> not rigorously documented. There's no reason at this
> time to believe it to be harmful or helpful. Therefore
> other behaviors are of sound principal and compared
> to some of our favorite legacy maintainers) of
> excellent value.
>
> I'll be phasing out my collection of 'wall-wart'
> charger-maintainers to locals for continued service
> on their vehicles. I'll be replacing them with
> this (or similar) offerings.
>
> Bob . . .
>
> ////
> (o o)
> ===========o00o=(_)=o00o======
==
> < Go ahead, make my day . . . >
> < show me where I'm wrong. >
> =======================
=========
>
> In the interest of creative evolution
> of the-best-we-know-how-to-do based
> on physics and good practice.
>
Message 2
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| Subject: | Re: Promised data on YONHAN 8A charger performance |
At 05:45 PM 10/19/2023, you wrote:
>Hi Bob,
>
>About the=C2 YONHAN charger-maintainer. . .=C2
>After it steps into the maintainer mode cycle does it stay
>there or does it go to an Off mode after a certain time period..?
EXCELLENT question . . .
I just went out to the shop to find that the
recharge after 'crank test' had been terminated
for some time. (I was out of town today)
The charger displayed OFF. No output was detectable
from the charger and the voltage was falling very
slightly and slowly to what I presume will be the
open-circuit resting voltage for this specimen.
Without disconnecting the charger, I performed a
cranking test . . . ran out of oompf in the load
bank . . . could only drag it down to 9.5v at
700+ amps.
After the test, the charger remained in the OFF
condition. After a minute or so, I cycled through
the modes and it woke up to initiate a recharge
activity.
I'll let it go to completion again . . . shouldn't
take long to complete with so short a discharge
event.
>Reading some of the details, it seems to have an
>Off mode option which on a maintainer seems odd.
>If it does have an Off mode, then it must have
>some sense circuitry=C2 to tell it when to switch
>back on and run the whole scenario again.
At first blush, it appears to have IGNORED a
significant discharge event and failed to initiate
a recovery. We'll explore this further but while
the product performs as a capable charger,
it did not step up to the plate as a MAINTAINER.
Thanks for the question!
Bob . . .
////
(o o)
===========o00o=(_)=o00o=======
=
< Go ahead, make my day . . . >
< show me where I'm wrong. >
========================
========
In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.
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