Other Parts Discussed in Thread: BQ78350-R1A, TIDA-00792,
Hi,
we are using the BQ76940 AFE IC along with the BQ78350-R1A companion IC for developing our 48V (15-cell) Battery Management System. We are using the TIDA-00792 design as a reference for the BMS development. The max discharge current in our application is 200A. The document 'BQ769x0 Family Top 10 Design Considerations', points out to some issues involving random cell connections. It says that that the bottom-up cell connection approach is recommended or connecting VSS followed by the cell connection which provides the group power (cell 5). Since, this BMS is going to be used in the field, following such an approach every time while making a connection might not be feasible. The document says that using zeners across each cell might help in preventing the problems. However, this approach seems inefficient as it will increase the board area and the BOM cost. Can you please let me know if random cell connection will actually cause serious issues given the current range I am talking about (max. discharge current 200A). If yes, can you please let me know a workaround that is tested in the field and is efficient?
Looking forward to hearing from you.
Thanks & Regards,
Darshil
