Today's Message Index:
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1. 05:30 PM - New kid on the block in automatic chargers (Robert L. Nuckolls, III)
2. 07:08 PM - Re: New kid on the block in automatic chargers (Jeff Luckey)
Message 1
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| Subject: | New kid on the block in automatic chargers |
At 10:10 PM 9/13/2023, you wrote:
>
>Thanks for the link. Yes, I have the exact same charger but with
>different results from others.
>
>I tried charging a motorcycle battery (with the "motorcycle"
>setting) and it attempted to boil away the electrolyte.
If you can see bubbling, are we talking about a flooded
lead-acid battery?
>I tried charging a 12V deep cycle battery that still had enough
>power to get the solenoids for a pump to click. I was watching the
>display and it jumped to 28V. Over the course of a minute or two
>the voltage didn't come down and I started to smell battery acid.
ANY TIME YOU GET SMELLS/BUBBLES/VISIBLE LIQUID during
a charge operation, something is seriously wrong. Unplug
charger first, disconnect later, measure open circuit
voltage after things settle down.
>I ended up charging the deep cycle battery with a regular
>charger. After the regular charger had dropped to a low charge rate,
Do you know what the battery voltage was at 'end of charge'?
What brand and model of the 'regular' charger?
> I disconnected it and connected the Yonhan charger and put it into
> pulse repair mode. A couple of previous
> lister's comments mentioned the short cables and the spark when
> the charger was connected. I had the
> battery on the floor and the charger on top of it due to cable
> length issues. I disconnected one of the
> leads from the charger to the battery to check the battery
> voltage. When I reconnected the lead to
> the battery, the battery exploded and blew out one side and part
> of the top. My ears were ringing
> for the next 20 minutes from the blast.
I'm so glad you were not seriously injured!
I've had occasion to use and gather data on three of those
chargers two of which are now in the hands of clients.
One is on my bench.
We don't have enough data to offer a reasonable analysis
of what you experienced. I've plotted the behavior
of the yonhan charger in the 'pulse mode' and I'm
preparing a report along with voltage plots which
will come in a day or so.
I was off line in Oregon for a couple of weeks and
then it took a week to get back in gear when I got
home!
In the mean time, can you give us a history of the
two batteries you cited and a description of the
'standard' charger?
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: New kid on the block in automatic chargers |
westmeath,
Can you give us a timeline of the events described above?
How much time had passed since the battery was bubbling and the spark that
caused the explosion?
This is scary stuff.=C2- The same thing happened to my dad some 50 years
ago with some truck batteries that were part of a test bench.=C2- These w
ere big flooded-cell batteries and electrolyte spilled out all over the sho
p floor.=C2- Yet another good reason to wear eye protection when working
with batteries.
-Jeff
On Friday, September 15, 2023 at 05:40:55 PM PDT, Robert L. Nuckolls, I
II <nuckolls.bob@aeroelectric.com> wrote:
At 10:10 PM 9/13/2023, you wrote:
--> AeroElectric-List messageposted by: westmeath@rcn.com
Thanks for the link.=C2- Yes, I have the=C2- exact same charger butwith
different results from others.
I tried charging a motorcycle battery (with the "motorcycle"setting) and it
attempted to boil away the electrolyte.
=C2- If you can see bubbling, are we talking about a flooded
=C2- lead-acid battery?
I tried charging a 12V deepcycle battery that still had enough power to get
the solenoids for a pumpto click.=C2- I was watching the display and it
jumped to 28V.=C2-Over the course of a minute or two the voltage didn't c
ome down and Istarted to smell battery acid.
=C2- ANY TIME YOU GET SMELLS/BUBBLES/VISIBLE LIQUID during
=C2- a charge operation, something is seriously wrong. Unplug
=C2- charger first, disconnect later, measure open circuit
=C2- voltage after things settle down.
I ended up charging the deepcycle battery with a regular charger.=C2- Aft
er the regular charger haddropped to a low charge rate,
=C2- Do you know what the battery voltage was at 'end of charge'?
=C2- What brand and model of the 'regular' charger?
=C2-I disconnected it andconnected the Yonhan charger and put it into pul
se repair mode.=C2- Acouple of previous
=C2-lister's comments mentioned the=C2- short cables and the sparkwhen
the charger was connected.=C2- I had the
=C2-battery on the floor and the charger on top of=C2- it due tocable l
ength issues.=C2- I disconnected one of the
=C2-leads from the charger to the battery to check=C2- the batteryvolta
ge.=C2- When I reconnected the lead to
=C2-the battery, the battery exploded and blew out one side and part ofth
e top.=C2- My ears were ringing
=C2-for the next 20 minutes from the blast.
=C2- I'm so glad you were not seriously injured!
=C2- I've had occasion to use and gather data on three of those
=C2- chargers two of which are now in the hands of clients.
=C2- One is on my bench.
=C2- We don't have enough data to offer a reasonable analysis
=C2- of what you experienced. I've plotted the behavior
=C2- of the yonhan charger in the 'pulse mode' and I'm
=C2- preparing a report along with voltage plots which
=C2- will come in a day or so.
=C2- I was off line in Oregon for a couple of weeks and
=C2- then it took a week to get back in gear when I got
=C2- home!
=C2- In the mean time, can you give us a history of the
=C2- two batteries you cited and a description of the
=C2- 'standard' charger?
=C2- Bob . . .
=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2
-=C2-=C2-=C2-=C2-=C2-////
=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2
-=C2-=C2-=C2-=C2-(o o)
=C2-=C2- ===========o00o=(_)=o00o====
=====
=C2-=C2- < Go ahead, make my day . . .=C2-=C2- >
=C2-=C2- < show me where I'm wrong.=C2-=C2-=C2-=C2-=C2->
=C2-=C2- ====================
============
=C2-
=C2-=C2- In the interest of creative evolution
=C2-=C2- of the-best-we-know-how-to-do based
=C2-=C2- on physics and good practice.
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