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BQ77PL900: BQ77PL900 application problems

Part Number: BQ77PL900


I have used BQ77PL900 to connect 8 groups of tandem lithium-polymer.Each battery pack has 5 pieces of lithium-polymer in parallel  .Each battery voltage 4.2V. The designed board can work normally.

Now I plan to replace lithium-polymer with Li-Lion of the same voltage  . Use This board to Connect 8 groups of tandem Li-Lion.Each battery pack has 6 pieces of Li-Lion in parallel. However, after the Li-Lion battery pack is connected to the board, overvoltage is displayed  . Is there any difference between LI-lion and li-polymer for BQ77PL900 that should be noticed  .thank you!