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 
   

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