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bq76PL536A cell balancing

Other Parts Discussed in Thread: BQ76PL536A

I have a 15 Ah Li-ion battery pack in a 9 series configuration. The BMS is based on two stacked bq76PL536A circuits. I want to use fast charging, i.e. I want to charge the battery in 30 minutes or less.

That means that the battery can sometimes be charged only during the constant current phase (approximately 30 A) and ending the charging process at approximately 90 % SOC. How should the cell balancing be set up and used to get out the most advantages of the chip under these operating conditions? Is there any detailed information available about how this cell balancing working?

Are there any drawbacks or obsticals to doing cell balancing while charging? Is the cell voltage readings reliable during 30A charging?

  • I already answered this in the other thread you started but here it is again...

    In your application the bq76PL536A is used to monitor the cell voltages, which would be fed into a balancing algorithm of your design. When your algorithm decides that balancing is required, the bq76PL536A can be instructed to enable balancing on the required cells.

    The details and strategy of the algorithm are completely up to you.