If there isn't a delay, the charger won't turn off when it is supposed to, so that's a problem needs to be fixed. My guess is that a 48V charger will need to sense about 61.2V to shut-off, just like a 36V charger needs to see something in the 44V-46V range.Ĭheck to be sure there was a 3-5 second delay between plugging charger into cart and charger coming on. At 60V your battery pack voltage probably isn't high enough to shut off the charger automatically. Once the battery pack voltage begins to approach 2.35V per cell, the charge current begins to taper off to about 2A-8A and stays there as the pack voltage continues to rise towards full charge levels.ĥ. The transformer and capacitor pairs are different values for different battery pack voltages (36V and 48V being the common ones), but they all limit the current in the bulk charge phase to about 25A or so. The transformer and capacitor are a matched pair that forms what is called a ferroresonant transformer circuit. The nominal "On-Charge" cell voltage can be as high as 2.79V when full charge is approached, or 66.96V for a 48V battery Pack, so your batteries probably aren't fully charged yet.Ĥ. Overcharging is continuing to force current through a cell after the SG of the electrolyte stops rising. Fully charged is when the Specific Gravity of the electrolyte does not rise for three consecutive measurements taken at one hour intervals. You need about 2.5V per cell to get gassing.ģ. Also, I'd be careful with the oil coming out of it, the was some nasty stuff used in insulating oils a few year back.Ģ. If the capacitor is leaking, I'd still replace it. Great!!!! That's the way the Ammeter ought to behave. Is the capacitor sort of a voltage regulator also?ġ. They were at around 50 volts when I hooked it up. ![]() After a little time I heard the batteries gassing and checked the volts, a little over 60 volts.ģ. Charger came on, jump to 20 amps then settled back to 5 amps.Ģ. Well, today I cleaned everything up, including the old cap.
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