My gut tells me there is no point balancing the banks with one another - the balancers are there to ensure the batteries in series are balanced for as long as possible to maximise the life of each virtual 24V battery by equalising the voltage on each of the physical 12V batteries.
To prevent unbalance in the future, as the batteries are aging, use a Battery Balancer. The battery balancer is wired into a system as indicated in the image on the right. It measures the battery bank voltage and also the individual battery voltages.
It measures the battery bank voltage and also the individual battery voltages. The battery balancer activates as soon as the battery bank is being charged and the charge voltage has reached more than 27.3V. At that moment, the battery balancer will start to measure and compare the voltages of both batteries.
Number of cells: The balancing system becomes more complex with the number of cells in the battery pack. Balancing method: Choose active and passive balancing techniques based on the application requirements. Balancing current: Determine the appropriate balancing current to achieve efficient equalization without compromising safety.
Battery balancing is crucial in various applications that use multi-cell battery packs: Electric vehicles (EVs): Battery balancing ensures optimal EV battery packs’ performance, range, and longevity. Renewable energy storage: Large-scale battery systems for solar and wind energy storage benefit from efficient balancing.
A 48V battery bank can be balanced with three Battery Balancers. Green: on (battery voltage > 27,3V) Orange: lower battery leg active (deviation > 0,1V) Orange: upper battery leg active (deviation > 0,1V) Red: alarm (deviation > 0,2V). Remains on until the deviation has reduced to less than 0,14V, or until system voltage drops to less than 26,6V.