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Old 04-22-2019, 06:29 AM   #1
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What is this on my battery

I finally dismantled my house battery cables and such to clean everything up Sunday as corrosion has gotten kind of bad.

I have been wondering what these little half moon shaped copper plates are for between the batteries.
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I presume they are sort of acid attracting plates to help direct gassing battery acid to them rather than the cables and battery tray...

I googled around on this and came up with nothing.

Thanks for any info on them...
Windeckere
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Old 04-22-2019, 06:35 AM   #2
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Yep. just like sacrificial sink on boats. Just like the anode rods in a WH.
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Old 04-22-2019, 06:49 AM   #3
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Back in my youth, everyone would put a penny near each post on their car battery
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Old 04-22-2019, 09:24 AM   #4
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Quote:
Originally Posted by Wizard View Post
Back in my youth, everyone would put a penny near each post on their car battery
LOL - back in the days when pennys where made out of copper.
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Old 04-22-2019, 11:42 AM   #5
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Dunno, guys... Those plates look like the tops of battery hold-downs to me.
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Old 04-22-2019, 12:59 PM   #6
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Dunno, guys... Those plates look like the tops of battery hold-downs to me.
That's my vote. You don't see any other visible means of support, either brackets across the top or through the lift tabs. A magnet will tell you in a hurry what they're made of.

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Old 04-22-2019, 07:19 PM   #7
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Originally Posted by l1v3fr33ord1 View Post
Dunno, guys... Those plates look like the tops of battery hold-downs to me.
Without a look at the underside of the battery tray cant really tell? I agree they look like hold downs and they may also keep the batteries separated to keep the battery cases from rubbing on each other.
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Old 04-23-2019, 05:27 AM   #8
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Thanks folks.
They are for sure not battery hold down devices. They just sit on top of the batteries and have a small leg that rests between the batteries about 2 inches long.

I already cleaned and reinstalled them, copper for sure, 100%

It is sort of neat, not sure where the chicken and egg go in this story but the batteries stayed perfectly clean for about 1.5 years after installation, then slowly the copper plates started collecting green, then all the sudden things got green all over.

My assumption was/is as the batteries age and take more to charge them, they gas more causing more corrosion issues.
Curious if the corrosion got bad all at once because the copper plates sort of got full so to speak so corrosion formed elsewhere.

I will know in about 6 months LOL.

I wonder why Monaco did not install a small brushless motor fan in the battery compartment to sort of vent it better. It could be controlled such that the fan only runs when the charger is in bulk mode or whatever.

Another day I guess.
Thanks again for your input!
Windecker
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Old 04-28-2019, 09:58 PM   #9
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Those do look like hold down clamps. For dissimilar metal (zincs) to prevent corrosion they need to be in a liquid medium. Like salt water.
The photo shows serious corrosion on a couple of the cable lugs. If it has begun to delaminate them I would replace the cable.
The only thing that will arrest and prevent corrosion is baking soda.
This is how I treat my battery bay.
Ensure all the battery caps are tight. Mix an entire box of baking soda with 3/4 gallon of distilled water and pour over all surfaces. Repeat until there is no more foaming on any surface. Now liberally sprinkle a box over all surfaces and leave it there. Before checking water level rinse off baking soda with distilled water. (No baking soda.)
Never do anything or even open the battery area without a gallon jug of baking soda infused water with you. Sulfuric acid will cause severe burns in as little as one second when it contacts skin.
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Old 04-29-2019, 11:16 AM   #10
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Quote:
Originally Posted by f4sup View Post
Those do look like hold down clamps. For dissimilar metal (zincs) to prevent corrosion they need to be in a liquid medium. Like salt water.
The photo shows serious corrosion on a couple of the cable lugs. If it has begun to delaminate them I would replace the cable.
The only thing that will arrest and prevent corrosion is baking soda.
This is how I treat my battery bay.
Ensure all the battery caps are tight. Mix an entire box of baking soda with 3/4 gallon of distilled water and pour over all surfaces. Repeat until there is no more foaming on any surface. Now liberally sprinkle a box over all surfaces and leave it there. Before checking water level rinse off baking soda with distilled water. (No baking soda.)
Never do anything or even open the battery area without a gallon jug of baking soda infused water with you. Sulfuric acid will cause severe burns in as little as one second when it contacts skin.
Thanks for the concerns.

Yup baking soda works well. I will use acid/corrosion cleaner for heavy stuff and baking soda/water for final prep.

Plates are not hold downs, well, they hold the corrosion down LOL.
IRV wont allow me to post a picture of a removed copper cap today.

Agreed on replacing cables. I ordered in new connectors but ran out of time before my next trip. I will get them replaced later. All batteries are taking the same amount of water consistently so I am guessing they are all sharing the load.

I need to clean and repair yhd battery trays also.

Windecker.
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Old 04-29-2019, 09:02 PM   #11
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hold downs

Windecker - If you by chance need hold downs - I found these straps (selected the SS ends ) worked pretty well. https://www.strapworks.com/ProductDe...ductCode=FHS1N
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Old 04-30-2019, 06:06 AM   #12
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Thank you for the link.
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Old 04-30-2019, 09:15 AM   #13
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I'm glad you posted that pic of how the GC batteries are oriented in tray. I have two big batts in mine. I might put a long bolt/all-thread in center to 1\2" piecees of lexan One as spacer other to clamp down all four batts.
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Old 04-30-2019, 11:32 AM   #14
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Are those U.S. Batteries holding up well?
A golf cart store will sell me the AMGs for $175 no core charge. I would be short 2 cores at SAMS $18ea "but will accept auto" and some GC stores they want to charge $36 ea.
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