Thanks Alvarado.
The edison breakout board required the external power supply between 7~17V.
I installed the edison to my robot, my robot battery power is 16V. (12V in the title is wrong, sorry for this)
I realized that when my robot is in charging, the battery power may come to 18V.. Don't know whether this is the root cause.
But do you know why it will break edison core module? I think there should have some protection in core module.
If this is the case, any method to repair the core module?
Thanks all.