In the process of use, there will be damage of components (not connected to the 18V machine, low power after inserting 18V charging, found that charging can not be found, detection found that BAT+ short circuit to the ground).The main performance is BAT+ short circuit to the ground (battery short circuit), fuse F1 is not damaged.The damaged devices include: R37 resistance 0 ohm becomes about 280 ohm, NMOS tube Q14 is damaged (S1 short-circuit to the ground), diode D14 positive pole short-circuit to the ground, D14 positive and negative pole short-circuit (after D14 is removed, U5 22 pin is found to have no short-circuit, diode D14 short-circuit, C79 short circuit).
The falilure rate is a total of 25 pieces were tested and 3 failed
Attached schemetic:BQ24610 Failure rate is too high.docx
