Well let's see, you'll have a few problems. Assume a total of n+11 batteries in the string. What does the DC-DC that is suppose to charge battery n+11 connect too? Your idea of connecting it to the last and first won't work (assuming 12V batteries it would be reverse biased with 120V, that usually lets the smoke out ) Also DC-DCs are expensive, probably at least 5-10 times as much as battery regulators. They probably won't be as efficient as regulators. Finally this scheme doesn't do anything to prevent a battery's voltage from going too high.
So yeah it would work (except for that problem with n+11), but it doesn't seem to me that it would work even as well as the other (cheaper) methods already available. 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? > >Dan > > > >
