(Psychological / emotional perspective)
To dream of bats attacking us shows the need to confront our fears of madness. Because of their mouselike bodies and birdlike wings, bats are seen as having a dual nature. When the image is of a sports bat, such as cricket or baseball bat, the suggestion is that we are not able to use implements without some kind of training.
To dream of using such a bat indicates a learnt degree of competence.