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BQ25171-Q1: need of cell balancing IC

Part Number: BQ25171-Q1
Other Parts Discussed in Thread: BQ76PL102, BQ25798

Hi team,

My customer is considering to use BQ25171-Q1 for thier application.

In the datasheets, in Figure 8-14, there aren't any monitoring IC with cell balancing function.

Is this with the assumption that the battery have a protection?

If the battery that they are going to use doesn't have a protection in it, do they have to use cell balancing ICs like BQ76PL102?

Give me an advice about the needs of cell balancing ICs for a protection.