bq20z90+bq29330 DSG external protection mosfet damage

Hi,

We have some question need to clarify,please refer to below:

 1)      Can any protection components/ circuit be added to this positive line? Example, adding a TVS and etc

2)      What is the ESD level for this Ti application board?

3)      Any other way to prevent this component from damaging beside removing this Q5. Example, doing setting on the bqeazy.

BTW, we already conducted the ESD contact discharge test and it failed at 6kV on positive pack plate. It blow the Q5 MOSFET during 6kV test.

Thanks.

Regards,

Loon