Hi!On nuke subs, we tricked discharged our lead acid battery bank at 5 amps every hour for every day when the battery was not being used as a power source. When used as a power source, after the event, the electrician on watch at the electrical panal would get permission and commence a "normal" battery charge to get the amps taken out back in.
Once per month, we discharged it to 50% of CALCULATED capacity at a controlled discharge rate and recharged it normally to verify calculated capacity.
Every 6 months we did a test discharge (after inspection and water level check) from 100% capacity to verify that it operated per designed, as compensated for any cells jumpered, and then equalized it. We then reran the capacity number checks.
While the distinction between the data collected may appear to be small, it is not
This is my memory serving me. the time frames can be wrong, but I do not think so.
If I also remember, we tended to do the equalizers at sea as the the motor generators could easily really "reach and maintain ordered amps" that was needed at the start of the equalizer.
Only the reactor got more care and better feeding than the battery. And, batteries lasted a real long time, like decade ++++
Lee On Nov 16, 2008, at 1936, Lee Haefele wrote:The Submarine battery discharge may have been to test the batteries rather than to cycle them to improve them. If you need more I will ask my wife's uncle who was a submarine electrician in WW2.
Lee Haefele ----- Original Message ----- From: Norm of Bandersnatch To: [email protected] Sent: Saturday, November 15, 2008 10:26 AM Subject: Re: [Liveaboard] Battery Discharge DepthThey (Home Power magazine) say for the best longevity/usefulness discharge deep cycle batteries no deeper than 50% of the battery bank's rated capacity and the less the better.
There was a report from a submariner on the List that the manufacturer of the batteries in his submarine specified that the batteries be discharged to a certain point and recharged periodically if they were not done so by operational activities.
I use an E-Meter, a round (about 2"), Amp hour meter that can show Volts, Amps, Amp hours, and percent discharge. I made a hole in my Trace front panel and mounted it there.
Question: I know we capitalize Volt, Ampere (and Amp), Watt, Ohm and Hertz because they are people's names, so shouldn't Amp hours be Ah, not AH as we usually do? I use DCV and acv like that because that's what they do in Home Power magazine.
Norm S/V Bandersnatch Lying Julington Creek 30 07.695N 081 38.484W ----- Original Message ----- From: Lee Haefele To: [email protected] Sent: 11/15/2008 9:45:11 AM Subject: Re: [Liveaboard] Electrical systems installIf you run your batteries all the way to dead, you will shortly need new ones. I know a standard car battery is ruined in about 3 total discharges. Suggest installing a battery monitor, so you know when to charge and when it is economical to stop.
Lee Haefele _______________________________________________ Liveaboard mailing list [email protected]To adjust your membership settings over the web http:// www.liveaboardnow.org/mailman/listinfo/liveaboard
To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/To search the archives http://www.mail-archive.com/ [email protected]
The Mailman Users Guide can be found here http://www.gnu.org/software/ mailman/mailman-member/index.html
Internal Virus Database is out of date. Checked by AVG - http://www.avg.comVersion: 8.0.175 / Virus Database: 270.8.6/1769 - Release Date: 11/5/2008 7:17 AM
_______________________________________________ Liveaboard mailing list [email protected]To adjust your membership settings over the web http:// www.liveaboardnow.org/mailman/listinfo/liveaboard
To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/To search the archives http://www.mail-archive.com/ [email protected]
The Mailman Users Guide can be found here http://www.gnu.org/software/ mailman/mailman-member/index.html
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
