According to the scientific way of solving problems, your problem could have been caused by your new battery installation. Maybe a short circuit on the cables or in the engine fuse box led to a overheating on your inside fuse box. Because there is no fuses between the battery and the central junction box, the battery can handle the high amps, and cables are big enough, but your box isn't rated for that current and overheated, and at random picking the blower fuse on the circuit board. That is merely coincidence.
That is not to blame Ford, but your battery installers.
Now there is no other way but to dissasemble the board if you have the ability or maybe an electronic technician will help you to find that short, or double check the battery.
Remember that the battery problem could have gone already by the vibration on the car, and you have the board problem only.
Give it a try, and dissasemble the board.
