We need the datasheet of BQ79718-Q1 ,could you help ?

Hi

At present, TI only provides the application entry for the user guide of the EVM of this chip, see the link below.

BQ79718EVM-049 Evaluation board | TI.com

You can request this first, and then check to see if it contains datasheet you need.

If no datasheet, go to the English Technical Forum (TI E2E support forums) and ask experienced engineer if they can help.