Daniel Sama Rubio wrote: > > I am looking for feedback on a new idea for equalizing battery > strings. > > We could use 24V (30V) to 12V (15V) unidirectional DC-DC converters > with fixed output. The 24V input would be connected (to every other > battery. > There will be an 15V output connected to each battery. The last DC-DC > converter input would be connected to the last and first battery. > > The converters will be normally off. When the inputs reach 30V they > will start turning on. When battery n and n+1 go over 30V, converter1 > will try to charge battery n at 15V. Converter2 connected to battery > (n+1) and battery (n+2) will charge batery (n+1) at 15V. > > Would it work?
Yes, though there are easier ways. You don't need (or want) to use 30vin/15vout converters. Half your input power would come from the battery you want to charge. It would be better to use 15vin/15vout isolated converters. This is what the Powercheq modules do. Or, use a single 15vin/15vout converter, and switch it between pairs of batteries. This is what the Badicheq does. Or, power the modules from the pack voltage as a whole. This is what the Zivan Smoother does. Or, use a single converter powered from the pack as a whole or AC when parked and charging, and switch its output to the desired battery. This is what I do in my Balancer. -- Lee A. Hart Ring the bells that still can ring 814 8th Ave. N. Forget your perfect offering Sartell, MN 56377 USA There is a crack in everything leeahart_at_earthlink.net That's how the light gets in - Leonard Cohen
