You need to go the police when he abuses you, your injuries will be strong evidence.

Even if you don't have the motivation to do it for yourself, you need to do it for your children.

If he is capable of treating even one human that way, he is capable of treating anyone that way, including children.

You are the only person who can protect your children now. I hate to sound harsh, but it's the truth - if you do nothing and he abuses your children, you will be partially to blame, for enabling.

Don't be an enabler of child abuse. Go to the police.