external DSG mosfet short

Hi,

I'm using bq20z90 and bq29330 in my actual board, after we run few testing, pack+ and pack - will become 0V and we found that the Q5 are damage,it is this Q5(please refer to below pictures)Image may be NSFW.
Clik here to view. for protection purpose.

Thanks.

Regards,

Loon