It's been years since I have messsed with building electronics, so since I am getting a LOT of batteries of various types, I may as well start on some chargers. One of which (this project) comes because I'm getting these regularly:
http://www.batteriesplus.com/produc...ed-Lead-Acid-Batteries/102645-Werker/12V.aspx
It's a 12 volt 7 amp hour SLA if you can't see it.
Since many have been in use for years and may have seen their better days, I've been looking at desulfators to compliment my normal charger. For what I'm seeing them for, I think I can build one for pennies on the dollar.
It sounds like I can use a RC charging circuit that charges to around 167 volts from 120 volt Alabama Power. Once the RC circuit is full, it discharges into the battery (and hopefully will be destructive to the sulfate crystals). As the RC circuit charges again, I intend to check the voltage of the battery. If it's 12.6 volts or so, I won't fire the capacitor. Total charging power in RMS should be less than 5 watts, all short high current bursts. That's the theory I'm going for...
My first question is along these lines: I keep looking for guidelines on how much current and voltage I need, and can get away with using to desulfate, so I can size my capacitor. I know I will have to be careful not to go too much or I will be gassing my own dumb self with this one.
I hear there's also a resonant frequency of the battery itself I need to get my pulse width longer than. Again, no info on that to be found.
http://www.batteriesplus.com/produc...ed-Lead-Acid-Batteries/102645-Werker/12V.aspx
It's a 12 volt 7 amp hour SLA if you can't see it.
Since many have been in use for years and may have seen their better days, I've been looking at desulfators to compliment my normal charger. For what I'm seeing them for, I think I can build one for pennies on the dollar.
It sounds like I can use a RC charging circuit that charges to around 167 volts from 120 volt Alabama Power. Once the RC circuit is full, it discharges into the battery (and hopefully will be destructive to the sulfate crystals). As the RC circuit charges again, I intend to check the voltage of the battery. If it's 12.6 volts or so, I won't fire the capacitor. Total charging power in RMS should be less than 5 watts, all short high current bursts. That's the theory I'm going for...
My first question is along these lines: I keep looking for guidelines on how much current and voltage I need, and can get away with using to desulfate, so I can size my capacitor. I know I will have to be careful not to go too much or I will be gassing my own dumb self with this one.
I hear there's also a resonant frequency of the battery itself I need to get my pulse width longer than. Again, no info on that to be found.