Hi @anishkgt,
I would recommend using Advanced Linear Devices Inc.'s supercapacitor auto balancing MOSFET arrays, such as the ALD810026SCL or ALD810027SCL.
These are MOSFET arrays which have carefully tuned threshold values which are to be connected in parallel with each supercapacitor. When the voltage across each capacitor is below the threshold value, the MOSFETs conduct only nanoamps of current, but their conduction grows exponentially as the capacitor voltage increases, thereby keeping the cells balanced.
In addition to the integrated circuit packages, we also carry boards, either unpopulated or populated with the IC’s already soldered on, for evaluation purposes, such as those linked here:
If you find that they do not conduct enough current due to very high capacitor leakage currents, or that you need to balance very quickly due to high charge currents, one can add a few external components to increase the balancing current dramatically. The following boards can be used to test such circuits.
High-balancing current evaluation boards:
- SABMBOVP226 --> 2.6V threshold 2-cell array
- SABMBOVP227 --> 2.7V threshold 2-cell array