Today's Message Index:
----------------------
1. 02:09 AM - Residue on negative battery pole (werner schneider)
2. 06:44 AM - Re: Residue on negative battery pole (Sebastien)
3. 06:53 AM - Re: Residue on negative battery pole (Werner Schneider)
4. 07:06 AM - Re: Residue on negative battery pole (Sebastien)
5. 07:35 AM - Re: Residue on negative battery pole (Charlie England)
6. 08:57 AM - Re: Re: Why CB on regulator field supply? (Robert L. Nuckolls, III)
7. 09:25 AM - Re: Residue on negative battery pole (Robert L. Nuckolls, III)
Message 1
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| Subject: | Residue on negative battery pole |
Had a look at the battery today (currently pretty cold and cranking not to flashy)
and did see some residue on the negative battery pole, this is a Panasonic
LC-XC1222P any idea what this is coming from and what to do/check next?
Cheers Werner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=505753#505753
Attachments:
http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg
Message 2
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| Subject: | Re: Residue on negative battery pole |
Is it green?
On Thu, Jan 20, 2022, 02:13 werner schneider <glastar@gmx.net> wrote:
> glastar@gmx.net>
>
> Had a look at the battery today (currently pretty cold and cranking not to
> flashy) and did see some residue on the negative battery pole, this is a
> Panasonic LC-XC1222P any idea what this is coming from and what to do/check
> next?
>
> Cheers Werner
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=505753#505753
>
>
> Attachments:
>
> http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg
>
>
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| Subject: | Re: Residue on negative battery pole |
Hi Sebastien,
don't ask me I have a red-green deficiency, so my green is different
from yours :( I would tend more to a yellow, did you have a look at the
picture in the link?
BTW just made a capacity test (start voltage 13.05, start Amps 3.54,
stop voltage 10.75 volt with 3.1 A) after 4h 48 minutes
On 20.01.2022 15:43, Sebastien wrote:
> Is it green?
>
> On Thu, Jan 20, 2022, 02:13 werner schneider <glastar@gmx.net> wrote:
>
> <glastar@gmx.net>
>
> Had a look at the battery today (currently pretty cold and
> cranking not to flashy) and did see some residue on the negative
> battery pole, this is a Panasonic LC-XC1222P any idea what this is
> coming from and what to do/check next?
>
> Cheers Werner
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=505753#505753
>
>
> Attachments:
>
> http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg
>
>
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| Subject: | Re: Residue on negative battery pole |
Sorry Werner, I had not seen the attachment. It looks yellow to me as well
so I'm not sure what it is. My best guess is that the battery is leaking
fumes or battery acid and that's the result but I've never seen that colour
before.
On Thu, Jan 20, 2022, 06:56 Werner Schneider <glastar@gmx.net> wrote:
> Hi Sebastien,
>
> don't ask me I have a red-green deficiency, so my green is different from
> yours :( I would tend more to a yellow, did you have a look at the picture
> in the link?
>
> BTW just made a capacity test (start voltage 13.05, start Amps 3.54, stop
> voltage 10.75 volt with 3.1 A) after 4h 48 minutes
>
> On 20.01.2022 15:43, Sebastien wrote:
>
> Is it green?
>
> On Thu, Jan 20, 2022, 02:13 werner schneider <glastar@gmx.net> wrote:
>
>> glastar@gmx.net>
>>
>> Had a look at the battery today (currently pretty cold and cranking not
>> to flashy) and did see some residue on the negative battery pole, this is a
>> Panasonic LC-XC1222P any idea what this is coming from and what to do/check
>> next?
>>
>> Cheers Werner
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=505753#505753
>>
>>
>>
>>
>> Attachments:
>>
>> http://forums.matronics.com//files/img_20220113_111526870_sm_180.jpg
>>
>>
>>
>> ==========
>> -
>> Electric-List" rel="noreferrer noreferrer" target="_blank">
>> http://www.matronics.com/Navigator?AeroElectric-List
>> ==========
>> FORUMS -
>> eferrer noreferrer" target="_blank">http://forums.matronics.com
>> ==========
>> WIKI -
>> errer noreferrer" target="_blank">http://wiki.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> ="noreferrer noreferrer" target="_blank">
>> https://matronics.com/contribution
>> ==========
>>
>>
>>
>>
>
Message 5
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| Subject: | Re: Residue on negative battery pole |
On 1/20/2022 8:52 AM, Werner Schneider wrote:
> Hi Sebastien,
>
> don't ask me I have a red-green deficiency, so my green is different
> from yours :( I would tend more to a yellow, did you have a look at
> the picture in the link?
>
> BTW just made a capacity test (start voltage 13.05, start Amps 3.54,
> stop voltage 10.75 volt with 3.1 A) after 4h 48 minutes
>
> On 20.01.2022 15:43, Sebastien wrote:
>> Is it green?
>>
>> On Thu, Jan 20, 2022, 02:13 werner schneider <glastar@gmx.net> wrote:
>>
>> <glastar@gmx.net>
>>
>> Had a look at the battery today (currently pretty cold and
>> cranking not to flashy) and did see some residue on the negative
>> battery pole, this is a Panasonic LC-XC1222P any idea what this
>> is coming from and what to do/check next?
>>
>> Cheers Werner
>>
Honestly, it just looks like dirt, to me. Wipe it off & see if you see
any cracks/voids in the plastic or the sealant around the terminal. I'd
have expected any corrosion to start at the terminal itself, and taper
away from it; it looks like that stuff is in the inside corner of the
case material.
Charlie
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Message 6
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| Subject: | Re: Why CB on regulator field supply? |
>
>The characteristics of fuses vs. CB and nuisance trips were my
>guesses also, but I was hoping someone had more than a guess. Since
>the alternator supply is on a switch, I am not sure using a CB to
>manually turn off the alternator is needed as you can just turn off
>the alternator switch.
ASSUMING elects to incorporate crowbar ov
protection in their project, then to mitigate
possible but RARE nuisance trips of the OV
system, a crew accessible circuit breaker is
the field supply protection of choice. In
the event of an OV trip event, the pilot has
an opportunity to reset the breaker ONE time
to confirm the existence of failure in the
alternator's regulator.
ADDITIONALLY, if one chooses to use a DPST
battery master switch, battery and alternator come
ON-OFF together, the a pullable field supply
breaker is handy for disabling the alternator
for battery only ground operations thus elininating
an energy wasting, full-field drain on the battery.
NOTE. When picking a breaker for upstream management
of field supply in the crowbar system, it is a
really good idea to pick a breaker that is (1)
qualified to function as designed after a substantial
number of hard-fault trips. (2) actuates really
fast under the typical 50 to 200A current pulse
that an OV event impresses on the device. This style of breaker
is highly recommended for this application:
http://aeroelectric.com/Pictures/Breakers/circuitbreakers.jpg
This is one of many breakers NOT suited for service
upstream of a crowbar ov management device:
http://aeroelectric.com/Pictures/Breakers/Breaker_Failure_1a.jpg
Note also that all wound-field, alternator controllers
from B&C feature built-in crowbar ov management systems.
Incorporation of the recommended breaker applies to
these products. I've had a few readers over the years
who elected to protect their field supply with a fuse . . .
this is no more hazardous than a host of other
alternator failures . . . but pretty inconvenient
if that fuse resides in the recommended out-of-sight-
out-of-mind location in the airplane.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 7
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| Subject: | Re: Residue on negative battery pole |
>Honestly, it just looks like dirt, to me. Wipe it off & see if you
>see any cracks/voids in the plastic or the sealant around the
>terminal. I'd have expected any corrosion to start at the terminal
>itself, and taper away from it; it looks like that stuff is in the
>inside corner of the case material.
>
>Charlie
Agreed. The seal between battery posts and interior chemistry
is usually pretty good in AGM batteries. Also, the
stuff is a strange color for battery corrosion product.
Normally a compromised seal causes corrosion to
encircle the whole post
https://mechanicbase.com/wp-content/uploads/2019/07/battery-terminal-corrosion.jpg
if the products of oxidation are just from battery
internal chemistry, the color is dingy white. If
the corrosion has spread to include some terminal
materials or wire, you'll get some blue-green
stuff too.
One good check is to pour a bit of water saturated
with some baking soda on it. If you get a good 'fizz'
then there's products of electrolyte corrosion in the
residue . . . otherwise it's something else.
According to an 'old' data sheet on this product . . .
http://aeroelectric.com/Mfgr_Data/Batteries/Panasonic/lc-x1220p.pdf
the battery should support a 3a load for something on the
order of 6 hours. How old is the battery? If it seemed
weak cranking the engine, then it may well be demonstrating
high resistance and reduced capacity.
If you can get your hands on a 'real' battery tester
like this
https://www.harborfreight.com/500-amp-carbon-pile-load-tester-91129.html
make sure the battery fully charged (on maintainer until
the charge light goes out), then load the battery down
to 9 Volts and hold it there for 15 seconds (the
harbor freight tester has a handy timer for this purpose).
This battery will produce a 15 seconds crank at better than
500A when new, 300 or less along with your flagging cap-check
suggests nearing end of life.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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