Cor, Thanks - when I did a second charge there was not much time between.
But I still need an answer to my original question. How to hook up this charger for 220v (but so I can still use it with 110v when that's all I have). Adapters? Special cords? - Peter On Wed, Jul 10, 2013 at 2:50 PM, Cor van de Water <cwa...@proxim.com> wrote: > Jay, > > *do* write this up to your batteries getting old. > It has been documented many times here on the EVDL. > With age, the "full" voltage drops, so the charger never > reaches its threshold and starts *over* (not *under*) charging > your batteries. Luckily lead-acid is robust and can handle it > within reason. Due to your relatively short time-out the > damage done to your batteries is limited. > You may notice that your pack is warming up (further reducing the voltage) > due to the charger pumping power into full batteries. > If you let them cool for several hours and restart your charger, you will > see that the indicator will go higher due to the colder batteries. > Possibly it will even hit the threshold voltage to stop charging... > But as long as the batteries are old, the charger relatively wimpy > and the temp high, you will face this situation where you go from > battery charging into thermal runaway or at least a toast-em till timeout. > > Hope this clarifies, > > Cor van de Water > Chief Scientist > Proxim Wireless Corporation http://www.proxim.com > Email: cwa...@proxim.com Private: http://www.cvandewater.com > Skype: cor_van_de_water XoIP: +31877841130 > Tel: +1 408 383 7626 Tel: +91 (040)23117400 x203 > > > > -----Original Message----- > From: ev-boun...@lists.evdl.org on behalf of Jay Summet > Sent: Wed 7/10/2013 8:57 AM > To: Electric Vehicle Discussion List > Subject: Re: [EVDL] 2nd charge cycle > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 07/10/2013 11:30 AM, SLPinfo.org wrote: > > Hi folks, > > > > My Quick Charge Select-A-Charge charger is getting old as are my lead > acid > > batteries in my S-10 http://www.evalbum.com/3739. I've been using them > for > > about 2 years and have about 450 cycles on them. > > > > For the past several weeds the charger never seems to get up to the > target > > voltage. The display seems to get stuck at about 55-60% (varies a little > > from one day to the next) and then it just times out after about 11 > hours. > > Using my DVM it looks like it's hitting about 135V or so which is quite > low > > for my 120V pack. Clearly I'm undercharging my batteries. I sort of > knew > > this would happen as I bought the charger used and it's only rated for > > batteries up to 150 AH and mine are 170 AH Trojan T-875s. It also only > > puts out 10 amps at 110V so I may have been undercharging since day 1. > > > > I don't have an answer about your plug, but have you tried starting a > 2nd charge cycle after the charger times out? (e.g. charge your > batteries twice before using them?) 10 amps isn't a lot of current, but > it's not horribly horribly low (it's better than c/20, but not c/10). > > On the other hand, if it's still in the bulk charge stage (50-60% would > indicate this) it should be putting 10 amps into the batteries for 10 > hours which should be 100 amp hours. Do it twice and it should be able > to charge even a brand new 170 amp hour battery. Do you have a > Kill-A-Watt to verify that the charger is actually drawing 10amps? Do > you have an amp meter on the pack to verify that the batteries are > taking 10 amps? > > If the charger can't get the pack to 140 volts or higher during the 2nd > charge it might be a problem with your batteries, or a problem with the > charger, or even a problem with the power cord going to your charger > (to long, too much resistance, etc...) > > But I wouldn't put it down to just the age of the charger or batteries > before confirming how many amps you are actually putting in. Typically > when lead acid get older they have less capacity, but you can still > charge them up to a full voltage (using less Ah than when new!). > > Jay > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.10 (GNU/Linux) > Comment: Using GnuPG with undefined - http://www.enigmail.net/ > > iEYEARECAAYFAlHdhFQACgkQSWJjSgPNbM+okwCeLCVIMPt1Uxav/nCmv7D1li+z > vI8An3M3ThbkMne9z3VgPZ7nfKDVAcgp > =8E62 > -----END PGP SIGNATURE----- > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... 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