Thanks for sharing your story and welcome to SR.
Your story is sad and we all have our own versions of it. For the sake of you and your kids, I hope you continue to work on some sort of plan which has nothing to do with your AH.
For your own sanity, I'd stop worrying so much about what he smells like. You know exactly why it's being done and thinking any further about it than that, is a waste of your time and peace.
The sudden increase of energy is most likely due to coke use. You told us that he had a history of it. Well...Sounds to me like it's back.
Keep on doing what you need to ensure your health so you can take care of your kids. That's a very toxic environment for them to be in. By all means, put in a protection order if he tries anymore shenanigans with the kids.