![]() ![]() There is a lot of chargers for Nickel Cadmium but very little for SLA since amps too high. The 2nd hand UPS batteries that was replaced with new are 100A/H. Tried building some circuits but all seem to be geared for lower Amp rated batteries.īusy playing with x3 20A/H in series since the current in parallel needed is 6A (10%). ![]() ![]() So I don't think it is doing what it is supposed to be doing. I do have a multi stage charger but batteries get very hot and take very long. So the technology is out there and I just need to find it without importing expensive chargers. The second problem I face is trying to find a decent 10A circuit that is not Nickel Cadmium.Īpparently pulse charging is working it's way into the marine world since mariners don't have the time to wait while batteries are charging. Some say that this is not main stream technology but more research is needed. Why I am fixated on pulse charging is the wikpedia comments and others saying it is OK and quicker and does not harm the battery. For the record I have not blown anything up yet, I am too cautious for that AND DO A LOT OF RESEARCH FIRST. Thankyou all for your advice specially t06fre and jerseyguy1966. Recommended Maximum Charging Current Limit = 6AĮqualization and Cycle Service = 14.6 to 14.8 VDC/unit Average at 25oC Operating Temperature Range = Discharge: -20 ~60 Charge: 0oC~50oC Storage: -20oC~60oCįloat charging Voltage = 13.7 to 13.9 VDC/unit Average at 25oC Normal Operating Temperature Range = 25oC±5oCĬapacity = to 1.75V per cell = Approx. My question: Is there ballpark specs I can target on to start experimenting without blowing things up ? Will say a 50 - 60 volt pulse of short duration and 6.9A be sufficient ? I've rewound a transformer to deliver 500V DC pulses using a 555 timer but from a previous reply from one of the senior forum members this is too high. The locally import battery chargers we get from China are expensive and they don't do what they claim should happen ie multi stage charging.įrom some docs downloaded from Wikipedia and other sites, it seem that PULSE CHARGING SHOULD DO THE TRICK if high current/voltage pulses could be managed ie: magnitude, pulse rate etc. I have a need since after replacing my UPS batteries, I have a number of 2nd hand that I want to charge. I have scoured the net, sites like battery university and nowhere can I find any real info on what voltage, current, charge, discharge times to create a pulse charger for a 12V SLA battery. ![]()
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