Even if. Until there is a court order saying otherwise, he isn't obligated to support anyone, you OR the child. Anyone whose name is on an account can empty it, anyone whose name is on a bill can choose to pay it or not pay it.
Again, these are things that require some order before someone can be held to have violated it. Some of these issues might have been possible to address at the protection order hearing, but that's a moot point now. Once the order is in place against him, he'll have a strong arguement that he couldn't get money to you without violating the order.
These issues are the EXACT reason that dealing with an abusive relationship needs to be done with planning, anticipation of problems, and assistance. If you haven't already, you need to be getting in touch with your local program; they understand the issues you're facing and can point you to assistance in your area.
You can find info on programs in your state at
http://www.aardvarc.org/dv/states/menu.shtml
Be sure to check under "Safety Plan" in the left column also.