His own actions have put him there. He deserves what he's got. He's a dangerous and violent man. It doesn't matter what has happened to you, he doesn't now get to hurt you as his reward. He's an adult. Trust him to cope with what's happening.
You're in an abusive relationship which means that your thought processes aren't working as they should be. It's very common to have the sort of thoughts that you're having after an assault, to feel pity for the man who has abused you, to want to carry the responsibility for him, to want to somehow fix this for him. But if it was bad enough for the police to arrest him, then it's really bad. I know this is hard to accept. I know it feels easier just to make excuses and try and pretend it isn't as bad as it looks, that if you somehow fix this for him then everything will be alright going forwards, but it really won't be, it will get worse, because he will know that you'll protect him from the consequences of his actions. And he will do it it again. Maybe it will be months, or even years, but he will do it again, and it will be even more difficult to step away.
He will steal years of your life and destroy your health, and if you have children with him, he will destroy your chance at being a good mother to them.
Please ring women's aid and look into the freedom programme before you do anything to help him.