You instinct to run from this guy is entirely appropriate. You want nothing to do with a guy that beat a woman in the street.
I recommend calling him, right now, and telling him that you need to cancel your plans. And that you don't think you should see him again. If he asks why, you can tell him why.
Give him a quick, clear, honest message that you will not go out with him now or ever. Leave no question in his mind. He is a bad man with a bad temper and he can't be in your life. The clearer you are about that, the better it will be.
Good luck, and thank heavens for Google.