Bats in dreams often reflect fear tied to the unknown -- and, at the same time, an instinct for navigating situations you can't fully see or understand yet. A bat's reliance on senses other than sight can point to trusting intuition when logic runs out. If the bat frightens you, the dream may be asking what exactly you're afraid to look at directly.
It is much worse for an Artist to conceive he knows those things which he is ignorant of, than to be ignorant of those thing which he ought to know. - Cardan Girolamo (1501-1576)