NEED URGENT HELP!!

so I've recently decided it's time for me to get a divorce, my husband has been financially emotionally and is now starting to be physically abusive. the problem I have here is we share a bank account. anyone have any idea how I can save money while sharing an account. I need to move out asap and I'm finding it impossible. also any advice on how to make these moves without him knowing. I'm trying to just up and leave. then tell him why I left, cuz lord knows if I tell him then try to move it's not gonna go well.