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From: Lee and Zehra Licata (no email)
Date: Tue Sep 14 2004 - 20:40:49 EDT
Ron,
we would check for air agitation to each lead acid cell (keeps the
electrolyte mixed) topped off some 220+ cells using lots of water, check
with hygrometer, discharge at the 20 amp rate, temperature compensated,
and then measuring to ensure that we exceeded 180+ minutes.
then, we would recharge, quite carefully, until complete equalization
occurred. Lots of gassing. Kept H2 < 4%.
Then, when done, go back to a < 5 amp discharge rate, went into the
battery compartment, and field day'd the well.
Believe this took more than 6 hours total (discharge, charge cycle) and
much more than 12 hours if you count the preps and cleaning
If memory serves me, I think we did this every 30-45 days.
The above would count as a cycle. It was really done to ensure that we
knew what the capacity was.
If needed, we would jumper and / or replace bad cells as they went bad.
Care to do all that?
I think that if you water carefully, do not discharge > 50%, equalize
2-3 times a years, and actually measure the electrolyte with a real
hygrometer, you can really get some time out of the lead acid cells.
I do not believe that today's sub uses agms although some may be in use
in specialized application.
I also do not believe that you would equalize the agm as there no way to
replace any "fluid" that gasses off...
Lee
Ron Rogers wrote:
> Would this Navy practice be the equivalent of equalization? Do AGM
> batteries require equalization? If not, does the Navy use them?
>
> Ron Rogers
> Willard 40 AIRBORNE
> Lying Annapolis
>
> ----- Original Message -----
>
> From: <mailto:>
> To: <mailto:>
>
> "Forever" I have read that the less (less often and less deeply)
> the battery is discharged and recharged the longer it will last.
> Most of this info is from Home Power magazine.
>
> Until one day years ago on this list when a Navy submarine crewman
> mentioned that they routinely and periodically discharge and
> recharge the submarine's propulsion batteries as per the
> manufacturer's instructions.
>
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